WO2017206585A1

WO2017206585A1 - Data transmission method, apparatus and system

Info

Publication number: WO2017206585A1
Application number: PCT/CN2017/078460
Authority: WO
Inventors: 胡文权; 花梦
Original assignee: 华为技术有限公司
Priority date: 2016-05-30
Filing date: 2017-03-28
Publication date: 2017-12-07
Also published as: CN107453846A

Abstract

Embodiments of the present invention relate to the technical field of communications. Disclosed are a data transmission method, apparatus and system. The method comprises: a second network device receives data channels which are transmitted by a first network device and respectively correspond to transmission time intervals (TTIs) in a set of TTIs, the set of TTIs comprising a first TTI and at least one second TTI, obtains a first process identification corresponding to a transmission block in the first TTI, and determines respective second process identifications of the at least one second TTI according to the first process identification; generate response information separately corresponding to the set of TTIs according to the receiving conditions of the data channels separately corresponding to the set of TTIs; and transmit the response information corresponding to each TTI in the set of TTIs to the first network device separately. According to the embodiments of the present invention, transmission resources can be saved.

Description

Method, device and system for data transmission

The present application claims priority to Chinese Patent Application No. 201610369750.5, entitled "A Method, Apparatus and System for Data Transmission", filed on May 30, 2016, the entire contents of In this application.

Technical field

The present application relates to the field of communications technologies, and in particular, to a data transmission method, apparatus, and system.

Background technique

In the hybrid automatic repeat request (HARQ) process, the base station schedules a transmission time interval (TTI) transmission block, and the terminal sends a HARQ feedback message to the base station according to the receiving situation. Specifically, the terminal is in the When receiving the transport block, if the terminal does not correctly receive the transport block of the TTI, the base station sends a Negative Acknowledgement (NACK) to the base station, and the base station receives the response information NACK, and if the maximum number of retransmissions is exceeded, the terminal may The terminal retransmits the corresponding transport block. If the terminal can correctly receive the transport block, the terminal can feed back the acknowledgement information (Acknowledgement, ACK) to the base station, and the base station receives the acknowledgement information ACK, and can send a new transport block to the terminal.

In order to make full use of the time domain resources, the LTE system further adopts the multi-process HARQ technology. After a TTI calls the HARQ process to transmit data, waiting for receiving the HARQ feedback message, calling other HARQ processes to transmit other data, that is, how many An asynchronous adaptive HARQ process starts.

In order for the base station to distinguish between ACKs or NACKs corresponding to different TTIs, one transport block transmitted in each TTI is associated with one process, and a corresponding process identifier (also referred to as a process number) is assigned thereto, and control of each scheduled TTI is performed. The corresponding process identifier is indicated in the channel, and the terminal also feeds back the transport block of the corresponding process identifier when the response information ACK or NACK is fed back. In this way, after receiving the response information ACK or NACK, the base station can determine the correctness of the transport block of the corresponding TTI, and then decide whether to retransmit the transport block on the process.

In the process of implementing the present application, the inventors found that the prior art has at least the following problems:

Each time the base station schedules a TTI transport block, the process identifier corresponding to the transport block needs to be carried in the control channel of the TTI. When the base station continuously schedules multiple TTI transport blocks, the process will be included in all TTI control channels. Identification, which will consume a large amount of transmission resources.

Summary of the invention

In order to solve the problems of the prior art, embodiments of the present invention provide a method, an apparatus, and a system for data transmission. The technical solution is as follows:

In a first aspect, a method of data transmission is provided, the method comprising:

Receiving, by the first network device, a data channel corresponding to each TTI in a set of transmission time intervals TTI, wherein the set of TTIs includes a first TTI and at least one second TTI; acquiring and the first a first process identifier corresponding to the transport block in the TTI, and determining, according to the first process identifier, a second process identifier of each of the at least one second TTI; receiving, according to the data channel corresponding to the set of TTIs respectively In the case, generating response information corresponding to the set of TTIs respectively; sending response information corresponding to each TTI in the set of TTIs to the The first network device.

The first TTI is the first TTI of the set of TTIs, and the second TTI is the other TTIs of the set of TTIs except the first one.

The second network device receives the control channel corresponding to the set of TTIs sent by the first network device, and obtains the first process identifier of the first TTI, and then determines the second process identifier of each second TTI according to the first process identifier, where The two network devices generate corresponding response information according to the reception status of the data channel corresponding to each TTI, and then send the response information corresponding to each TTI to the first network device.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the receiving, by the first network device, the data channel corresponding to each TTI in the set of the transmission time interval TTI, includes:

Obtaining time domain range information of the set of TTIs, and determining, according to the time domain range information, the first TTI and the at least one second TTI included in the set of TTIs; respectively receiving the first a TTI and a data channel corresponding to each of the at least one second TTI.

The time domain range information is used to directly or indirectly reflect the range of the TTI in the time domain. The time domain range information may be the number of TTIs in a group of TTIs, that is, how many TTIs are included in a group of TTIs. Or the time interval between the first TTI and the last TTI in a set of TTIs, that is, the time interval between receiving the first TTI and receiving the last TTI in a set of TTIs, or the control information corresponding to the first TTI in a set of TTIs Effective time range, or the effective time range of the common control information corresponding to a group of TTIs.

The second network device may obtain time domain range information of a set of TTIs, and then determine each second TTI in the set of TTIs according to the time domain range information of the set of TTIs. The second network device may respectively receive the first TTI sent by the first network device, and each second TTI.

With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, determining, by using the time domain range information, the first TTI included in the group of TTIs and The at least one second TTI includes any one of the following situations: when the time domain range information indicates that the number of TTIs included in the group of TTIs is N, determining the set of TTIs The included TTI is the first TTI and consecutive N-1 second TTIs after the first TTI; and the time domain range information indicates the first TTI and the last one of the set of TTIs In the case of a time interval of the TTI, determining that the TTI included in the set of TTIs is the first TTI and all second TTIs after the first TTI and within the time interval; When the time domain range information indicates the effective time range of the control information corresponding to the first TTI, determining, according to the effective time range of the control information corresponding to the first TTI, determining that the TTI included in the set of TTIs is The first TTI and after the first TTI and at the All the second TTIs within the effective time range of the control information; in the case that the time domain range information indicates the effective time range of the common control information corresponding to the set of TTIs, according to the common group corresponding to the set of TTIs The effective time range of the control information is determined, and the TTI included in the set of TTIs is the first TTI and all the second TTIs that are after the first TTI and are within the effective time range of the common control information.

The time domain range information may be the number of TTIs in a set of TTIs, the second network device may obtain the number N of a set of TTIs, and the second network device receives N-1 TTIs after determining the first TTI in the set of TTIs. The N-1 TTIs are all second TTIs except the first TTI in the set of TTIs. Alternatively, the time domain range information may be a time interval between the first TTI and the last TTI in the set of TTIs, and the second network device may obtain a time interval between the first TTI and the last TTI in the first TTI, at the time. In the time range corresponding to the interval, in addition to the first TTI, the second network device receives the TTI corresponding to the self-scheduling, that is, all the second TTIs except the first TTI in the group of TTIs. Or, when The domain range information may be the effective time range of the control information corresponding to the first TTI, and the second network device may obtain the effective time range of the control information corresponding to the first TTI, where the second TTI is included in the effective time range. The device receives the TTI scheduled by the first network device, that is, all the second TTIs except a first TTI in a group of TTIs. Alternatively, the time domain range information may be a valid time range of the common control information corresponding to the TTI, and the second network device may obtain the effective time range of the common control information corresponding to the TTI, in the effective time range, except the first The TTI, the second network device receives the TTI corresponding to itself, that is, all TTIs except a first TTI in a group of TTIs.

With reference to the first aspect or the first to the second possible implementation manners of the first aspect, in a third possible implementation manner of the first aspect, the acquiring, by using the first process corresponding to the transport block in the first TTI Logo, including:

Obtaining a preset first process identifier corresponding to the transport block in the first TTI; or receiving a control channel corresponding to the first TTI sent by the first network device, and acquiring a control channel carried in the control channel The first process identifier, the first process identifier is a process identifier corresponding to the transport block in the first TTI of the set of TTIs; or the first process identifier is obtained by using a common control channel corresponding to the set of TTIs, The first process identifier is a process identifier corresponding to the transport block in the first TTI in the set of TTIs.

The first process identifier corresponding to the transport block in the first TTI in each group of TTIs is preset in the first network device and the second network device, and is stored in the first network device and the second network device. When the first network device schedules a group of TTIs to transmit data to the second network device, each TTI of the group of TTIs corresponds to the control channel, and the control channel may carry control information, and the control information may include resource allocation information, modulation and coding modes, and the like. The first process identifier corresponding to the transport block in the first TTI may be carried in the control channel corresponding to the first TTI in each group of TTIs. When the first network device schedules a group of TTIs to transmit data to the second network device, each group of TTIs may have a common control channel, and the common control channel corresponding to a group of TTIs may be preceded by a set of TTIs or in the first TTI. The first network device transmits to the second network device. The first network device may carry the first process identifier corresponding to the transport block in the first TTI in the common control channel.

With reference to the first aspect, in a fourth possible implementation manner of the first aspect, the determining, by the first process identifier, the second process identifier of each of the at least one second TTI includes:

Obtaining a preset maximum number of processes, and a TTI interval N between the first TTI and the Nth second TTI; dividing a sum of the first process identifier and the TTI interval N by the maximum process Number, the obtained remainder is determined as the second process identifier of the Nth second TTI, where N is a positive integer; or, the preset maximum number of processes is obtained, and the first TTI and the first a TTI interval P between the two TTIs; dividing the sum of the first process identifier and the TTI interval P by the maximum number of processes, and obtaining a remainder as the second of the first second TTI a process identifier, where P is a positive integer; a second process identifier of the Nth second TTI, and a TTI interval Q of the N+1th second TTI and the Nth second TTI, a sum of the second process identifier of the N second TTIs and the TTI interval Q, divided by the maximum number of processes, and the obtained remainder is determined as the second process identifier of the (N+1)th second TTI, where , N, Q are positive integers.

The second network device may determine, according to the first process identifier, a second process identifier of all the second TTIs in the set of TTIs, or the second network device may determine, according to the first process identifier, the second process identifier of the first second TTI. The second process identifier of the second TTI is determined by the second process identifier of the first TTI, such that the second process identifiers of all the second TTIs in a group of TTIs are determined one by one.

With reference to the first possible implementation manner of the first aspect, in the fifth possible implementation manner of the first aspect, the acquiring the time domain range information of the set of TTIs includes: acquiring the preset group TTI time domain range information; or Receiving, by the first network device, the control channel corresponding to the first TTI, acquiring time domain range information of the group of TTIs carried in the control channel corresponding to the first TTI; or A common control channel corresponding to a set of TTIs acquires time domain range information of the set of TTIs.

The technician can preset time domain range information of each group of TTIs that the first network device schedules for the second network device, and store the information into the first network device and the second network device.

Or, the first network device carries the time domain range information in the control channel corresponding to the first TTI in the set of TTIs, each time the first network device sends a set of TTIs to the second network device.

Alternatively, the first network device may carry a set of TTI time domain range information in a common control channel corresponding to a set of TTIs each time the first network device sends a set of TTIs to the second network device.

With reference to the first aspect or the first to fifth possible implementation manners of the first aspect, in the sixth possible implementation manner of the first aspect, the receiving, according to the data channel corresponding to the set of TTIs, respectively Before generating the response information corresponding to the set of TTIs, the method includes: receiving, by the first network device, a control channel corresponding to each TTI of the set of TTIs, where the control channel corresponding to the first TTI The control information corresponding to the first TTI is carried in the control channel corresponding to the second TTI, and the control information corresponding to each of the second TTIs is corresponding to the control information corresponding to the first TTI. Change information, the change information includes: incremental control information of control information of the second TTI with respect to control information corresponding to the first TTI, or control information corresponding to the second TTI with respect to the Control information updated by the control information corresponding to the TTI; determining, according to the control information corresponding to the first TTI and the change information corresponding to each of the second TTIs, control information corresponding to each of the second TTIs Demodulating and decoding a data channel for each data channel corresponding to each TTI in the set of TTIs according to control information corresponding to each TTI in the set of TTIs, and determining a data channel corresponding to each TTI Receiving situation.

When the second network device determines the control information of a certain TTI in the second TTI in the set of TTIs, if the change information corresponding to the TTI is the incremental control information of the control information corresponding to the TTI and the control information corresponding to the first TTI The control information corresponding to the first TTI and the change information corresponding to the TTI may be used as the control information corresponding to the TTI; if the change information corresponding to the TTI is the control information corresponding to the control information of the TTI with respect to the first TTI For the updated control information, the partial control information and the change information corresponding to the TTI in the control information corresponding to the TTI in the control information corresponding to the first TTI may be used as the control information corresponding to the TTI. In this way, the control information corresponding to each other TTI can be determined, and the transmission resources can be saved.

In particular, when a certain TTI in the second TTI corresponds to a retransmission on a certain process, the TTI may not correspond to the control channel, but inherit the control information in the control channel corresponding to the previous TTI in the process. For example, a set of TTIs includes 4 TTIs, a process identifier of a transport block of the first TTI is 0, a process identifier of a transport block of the first second TTI is 1, and a process identifier of a transport block of the second second TTI is 0. The process identifier of the transport block of the second second TTI is 1. When the feedback information corresponding to the transport block of the first TTI is NACK, it indicates that the error is received, and the retransmission of the second second TTI does not exceed the maximum weight. In this case, when the second second TTI is corresponding to the retransmission, the TTI may not use the control information in the control channel corresponding to the first TTI, and the control channel is saved.

The second network device may perform demodulation on the data channel corresponding to each TTI in a set of TTIs by using control information corresponding to each TTI in the set of TTIs, and then decode the demodulated data channel to determine whether it is correct. The data channel corresponding to each TTI is decoded, and then the reception condition of the data channel corresponding to each TTI is obtained.

With reference to the first aspect or the first to fifth possible implementation manners of the first aspect, in the seventh possible implementation manner of the first aspect, the receiving, according to the data channel corresponding to the set of TTIs, respectively Generating with the set of TTIs Before the corresponding response information, the method includes: receiving a common control channel corresponding to the set of TTIs sent by the first network device, and a control channel corresponding to each TTI in a set of TTIs, where the set of TTIs is corresponding to The common control channel carries the common control information corresponding to the set of TTIs, and the control channel corresponding to each TTI carries the common information corresponding to the control information of each TTI with respect to the set of TTIs. The change information of the control information includes: incremental control information of the common control information of each TTI relative to the common control information corresponding to the set of TTIs, or control information corresponding to each TTI Control information updated by the common control information corresponding to the set of TTIs; determining, according to the common control information corresponding to the set of TTIs and the change information corresponding to each TTI of the set of TTIs, respectively, determining each of the TTIs Control information; demodulating and decoding the data channel for each data channel corresponding to each TTI in the set of TTIs according to control information corresponding to each TTI in the set of TTIs Determining whether said received data channel in each case corresponding to the TTI.

When the second network device determines the control information of a certain TTI in the TTI, if the change information corresponding to the TTI is the incremental control information of the control information corresponding to the TTI and the common control information corresponding to the TTI, The common control information corresponding to the TTI and the change information corresponding to the TTI are used as the control information corresponding to the TTI; if the change information corresponding to the TTI is the control information corresponding to the TTI is updated with respect to the common control information corresponding to the TTI For the control information, the partial control information that is the same as the control information corresponding to the TTI in the common control information corresponding to the TTI, and the change information corresponding to the TTI may be used as the control information corresponding to the TTI. In this way, the control information corresponding to each other TTI can be determined, and the transmission resources can be saved.

With reference to the first aspect or the first to fifth possible implementation manners of the first aspect, in the eighth possible implementation manner of the first aspect, the receiving, according to the data channel corresponding to the set of TTIs, respectively Before generating the response information corresponding to the set of TTIs, the method includes: receiving a reference signal of each TTI of the set of TTIs sent by the first network device, where the reference signal of the first TTI is occupied The resource size is greater than or equal to the resource size occupied by the reference signal of each of the second TTIs; for the first TTI, channel estimation is performed on the first TTI according to the reference signal of the first TTI; Any one of the TTIs, according to the reference signal of any one of the TTIs, and all or part of the reference signals in the reference signals of the TTIs before the any one of the TTIs in the set of TTIs The TTI performs channel estimation. According to the control information corresponding to each TTI in the set of TTIs and the corresponding channel estimation result, the data channel is demodulated and decoded for each data channel corresponding to each TTI in the set of TTIs. ,determine Where each of said received data channel corresponding to the TTI.

For channel estimation of any TTI in the second TTI except for the first TTI in a set of TTIs, reference may be made to the reference signal of the TTI, and all references in the reference signals of the TTIs before the TTI in the set of TTIs. Signaling, performing channel estimation on the TTI, or referring to the reference signal of the TTI, and part of the reference signals in the reference signals of the TTIs before the TTI in the set of TTIs, performing channel estimation on the TTI, thereby saving transmission resources .

With reference to the first aspect or the first to eighth possible implementation manners of the first aspect, in the ninth possible implementation manner of the first aspect, the response information corresponding to each TTI in the set of TTIs, And sending, to the first network device, each of the set of TTIs through a control channel within a last TTI of the set of TTIs or within a TTI other than the set of TTIs The response information corresponding to the TTI is sent to the first network device. After receiving the data channel of all TTIs in a set of TTIs, the second network device may go to the first network through a TTI. The network device feeds back the hybrid automatic repeat request response message corresponding to the data information of each TTI in the set of TTIs, so that the uplink and downlink handovers are not required every time a TTI is received, so that the uplink/downlink switching overhead can be saved.

With reference to the first aspect or the first to the nine possible implementation manners of the first aspect, in a tenth possible implementation manner of the first aspect, the method further includes: in the first TTI or the group In a TTI before the TTI, the scheduling information corresponding to the data channel of each TTI in the set of TTIs is sent to the first network device by using a control channel.

The scheduling information may include information such as data channel resource allocation information, channel modulation and coding information, and power control indication, and the second network device may send a set of TTIs to the first network device by using the first TTI or a TTI before the set of TTIs. The scheduling information is such that uplink/downlink switching is not required every time a TTI is transmitted, thereby saving uplink/downlink switching overhead.

In a second aspect, a method of data transmission is provided, the method comprising:

Transmitting, to the second network device, a data channel corresponding to each TTI of the set of TTIs of the second network device; receiving, by the second network device, each of the set of TTIs fed back according to the receiving condition of the data channel The response information corresponding to the TTIs; and the hybrid automatic repeat request HARQ process is performed according to the received response information.

The first network device sends a data channel of each TTI in the set of TTIs to the second network device, and receives the corresponding response information of each TTI in the set of TTIs sent by the second network device, according to the received response information. , performing HARQ processing.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the set of TTIs includes a first TTI and at least one second TTI, and the control channel corresponding to the first TTI carries the foregoing a process identifier of a transport block of the TTI, where the control channel corresponding to the second TTI does not carry a process identifier of the transport block; or the common control channel corresponding to the set of TTIs carries the first TTI The process identifier of the transport block, where the control channel corresponding to each TTI in the set of TTIs does not carry the process identifier of the transport block.

The first TTI is the first TTI of the set of TTIs, and the second TTI is the TTI of the set of TTIs other than the first TTI.

The first process identifier may be carried in a control channel corresponding to the first TTI, or may be carried in a common control channel corresponding to a group of TTIs.

With reference to the second aspect, in a second possible implementation manner of the second aspect, the method further includes: determining time domain range information of the set of TTIs; and sending the set of TTIs to the second network device a control channel of each TTI, where the control channel corresponding to the first TTI carries time domain range information of the set of TTIs; or, sends a common control corresponding to the set of TTIs to the second network device Channel, the common control channel carries time domain range information of the set of TTIs.

The time domain range information may be carried in a control channel corresponding to the first TTI, or may be carried in a common control channel corresponding to a group of TTIs.

With reference to the second possible implementation of the second aspect, in a third possible implementation manner of the second aspect, the time domain range information of the set of TTIs is: the number of TTIs in the set of TTIs, or The time interval between the first TTI and the last TTI in the set of TTIs, or the effective time range of the control information corresponding to the first TTI in the set of TTIs, or the effective time of the common control information corresponding to the set of TTIs range.

With reference to the second aspect or the first to third possible implementation manners of the second aspect, in a fourth possible implementation manner of the second aspect, the set of TTIs includes a first TTI and at least one second TTI, The method also includes: determining separately The change information corresponding to the control information corresponding to the first TTI, and the change information includes: control information corresponding to the second TTI, relative to the first TTI The incremental control information of the corresponding control information, or the control information updated by the control information corresponding to the second TTI with respect to the control information corresponding to the first TTI; and the sending of the set of TTIs to the second network device a control channel corresponding to each TTI, where the control channel corresponding to the first TTI carries control information corresponding to the first TTI, and each of the control channels corresponding to the second TTI carries each of the foregoing The change information corresponding to the two TTIs.

The first network device may send, to the second network device, a control channel corresponding to each TTI in the set of TTIs, where the control channel corresponding to the first TTI carries the control information corresponding to the first TTI, and the control channel corresponding to the second TTI is carried in the control channel. There is change information corresponding to each second TTI. In this way, the first network device does not need to send all the control information corresponding to each TTI to the second network device, so that a large amount of transmission resources can be saved.

In particular, when the TTI in the second TTI corresponds to a retransmission on a certain process, the TTI may not correspond to the transmission of the control channel, but the control information in the control channel corresponding to the previous TTI in the process is used. Non-adaptive retransmission. If the set of TTIs includes 4 TTIs, the process identifier of the transport block of the first TTI is 0, the process identifier of the transport block of the first second TTI is 1, and the process identifier of the transport block of the second second TTI is 0. The process identifier of the transport block of the third second TTI is 1. When the feedback information corresponding to the transport block of the first TTI is NACK, it indicates that the error is received, and the retransmission of the second second TTI does not exceed the maximum number of retransmissions. In this case, when the second second TTI is corresponding to the retransmission, the TTI may not use the control information in the control channel corresponding to the first TTI, and the control channel is saved.

With reference to the second aspect or the first to third possible implementation manners of the second aspect, in a fifth possible implementation manner of the second aspect, the method further includes: determining, corresponding to each TTI of the set of TTIs The change information of the control information relative to the common control information corresponding to the set of TTIs, the change information includes: incremental control information of the common control information of each TTI relative to the common control information corresponding to the set of TTIs And control information updated by the control information corresponding to each TTI with respect to the common control information corresponding to the set of TTIs; the common control channel corresponding to the set of TTIs is sent to the second network device, and a group a control channel corresponding to each TTI in the TTI, where the common control channel corresponding to the set of TTIs carries the common control information corresponding to the set of TTIs, where each control channel corresponding to each TTI carries the foregoing The control information corresponding to the TTI is relative to the change information of the common control information corresponding to the set of TTIs.

The first network device sends a common control information corresponding to the TTI to the second network device, and the first network device may send, to the second network device, a control channel corresponding to each TTI in the set of TTIs, where each TTI corresponds to the control channel. Carrying change information corresponding to each TTI. In this way, the first network device does not need to send all the control information corresponding to each TTI to the second network device, so that a large amount of transmission resources can be saved.

With reference to the second aspect or the first to third possible implementation manners of the second aspect, in a sixth possible implementation manner of the second aspect, the set of TTIs includes a first TTI and at least one second TTI, The method further includes: transmitting, to the second network device, a reference signal of each TTI in the set of TTIs, where a reference signal of the first TTI occupies a resource size greater than or equal to a reference of each of the second TTIs The amount of resources occupied by the signal.

The first network device schedules a set of TTIs for the second network device, and the first network device may send the reference signal of each TTI to the second network device in the corresponding TTI, where the reference signal of the first TTI can perform channel estimation independently. The second TTI needs to refer to all or part of the TTI reference signals before the TTI in the TTI. The resource size occupied by the reference signal of the first TTI is greater than or equal to the resource size occupied by the reference signal of each second TTI. The resource size can be represented by the number of resource units, so that the reference signal of the second TTI occupies less transmission resources. Thereby saving transmission resources.

In a third aspect, a network device is provided, the network device comprising a receiver, a processor, and a transmitter, wherein:

The receiver is configured to receive, by the first network device, a data channel corresponding to each TTI in a set of transmission time intervals TTI, where the set of TTIs includes a first TTI and at least one second TTI The processor is configured to acquire a first process identifier corresponding to the transport block in the first TTI, and determine, according to the first process identifier, a second process identifier of each of the at least one second TTI; The processor is configured to generate response information corresponding to the set of TTIs respectively according to the receiving conditions of the data channels corresponding to the set of TTIs; the transmitter is configured to respectively use the set of TTIs The response information corresponding to each TTI is sent to the first network device.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the processor is configured to: acquire time domain range information of the set of TTIs, and determine, according to the time domain range information, The first TTI and the at least one second TTI included in a set of TTIs; the receiver, configured to receive a data channel corresponding to each of the first TTI and the at least one second TTI, respectively.

With reference to the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, determining, according to the time domain range information, the first TTI included in the group of TTIs and The at least one second TTI includes any one of the following situations: when the time domain range information indicates that the number of TTIs included in the group of TTIs is N, determining the set of TTIs The included TTI is the first TTI and consecutive N-1 second TTIs after the first TTI; and the time domain range information indicates the first TTI and the last one of the set of TTIs In the case of a time interval of the TTI, determining that the TTI included in the set of TTIs is the first TTI and all second TTIs after the first TTI and within the time interval; When the time domain range information indicates the effective time range of the control information corresponding to the first TTI, determining the TTI included in the set of TTIs according to the effective time range of the control information corresponding to the first TTI For the first TTI and after the first TTI and at All second TTIs within the effective time range of the control information; where the time domain range information indicates an effective time range of the common control information corresponding to the set of TTIs, determining the set of TTIs The included TTI is the first TTI and all second TTIs after the first TTI and within the effective time range of the common control information.

With reference to the third aspect or the first to the second possible implementation manners of the third aspect, in a third possible implementation manner of the third aspect, the processor is configured to: acquire a preset and the first TTI a first process identifier corresponding to the transport block in the medium; or the receiver, configured to receive a control channel corresponding to the first TTI sent by the first network device, where the processor is configured to acquire the control a first process identifier carried in the channel, where the first process identifier is a process identifier corresponding to the transport block in the first TTI of the set of TTIs; or the processor is configured to correspond to the set of TTIs And obtaining, by the common control channel, a first process identifier, where the first process identifier is a process identifier corresponding to the transport block in the first TTI of the group of TTIs.

With reference to the third aspect, in a fourth possible implementation manner of the third aspect, the processor is configured to: obtain a preset maximum number of processes, and between the first TTI and the Nth second TTI The TTI interval N is obtained by dividing the sum of the first process identifier and the TTI interval N by the maximum number of processes, and the obtained remainder is determined as the second process identifier of the Nth second TTI, where And N is a positive integer; or, the preset maximum number of processes, and the TTI interval P between the first TTI and the first second TTI; and the first process identifier and the TTI interval P And dividing by the maximum number of processes, the obtained remainder is determined as the second process identifier of the first second TTI, where, P a positive integer; obtaining a second process identifier of the Nth second TTI, and a TTI interval Q of the N+1 second TTI and the Nth second TTI, where the Nth second TTI is The sum of the second process identifier and the TTI interval Q, divided by the maximum number of processes, and the obtained remainder is determined as the second process identifier of the (N+1)th second TTI, where N and Q are positive Integer.

With reference to the first possible implementation manner of the third aspect, in a fifth possible implementation manner of the third aspect, the processor is configured to: acquire time domain range information of the preset one set of TTIs; or The receiver is configured to receive a control channel corresponding to the first TTI that is sent by the first network device, where the processor is configured to acquire the one that is carried in the control channel corresponding to the first TTI Time domain range information of the group TTI; or the processor, configured to acquire time domain range information of the set of TTIs by using a common control channel corresponding to the set of TTIs.

With reference to the third aspect or the first to fifth possible implementation manners of the third aspect, in a sixth possible implementation manner of the third aspect, the receiver, configured to receive the a control channel corresponding to each TTI in a set of TTIs, where the control channel corresponding to the first TTI carries control information corresponding to the first TTI, and each control channel corresponding to the second TTI carries And the change information of the control information corresponding to the first TTI, the change information includes: the control information of the second TTI corresponding to the first TTI The incremental control information of the control information, or the control information updated by the control information corresponding to the second TTI with respect to the control information corresponding to the first TTI; the processor, configured to control according to the first TTI The information and the change information corresponding to each of the second TTIs respectively determine control information corresponding to each of the second TTIs; the processor is configured to use, according to the control information corresponding to each TTI in the set of TTIs, For the one TTI in each TTI corresponding data channel to demodulate and decode the data channel, the receiving condition is determined for each data channel corresponding to the TTI.

With reference to the third aspect or the first to fifth possible implementation manners of the third aspect, in a seventh possible implementation manner of the third aspect, the receiver, configured to receive the a common control channel corresponding to a set of TTIs, and a control channel corresponding to each TTI in the set of TTIs, wherein the common control channel corresponding to the set of TTIs carries common control information corresponding to the set of TTIs, The control information corresponding to each TTI carries the change information of the control information corresponding to each TTI with respect to the common control information corresponding to the set of TTIs, and the change information includes: the common control of each TTI Incremental control information of the information relative to the common control information corresponding to the set of TTIs, or control information updated by the control information corresponding to each TTI with respect to the common control information corresponding to the set of TTIs; the processor And determining, according to the common control information corresponding to the set of TTIs and the change information corresponding to each TTI in the set of TTIs, the control information corresponding to each TTI; the processor, Demodulating and decoding a data channel for each data channel corresponding to each TTI in the set of TTIs according to control information corresponding to each TTI in the set of TTIs, and determining data corresponding to each TTI Channel reception.

With reference to the third aspect or the first to fifth possible implementation manners of the third aspect, in the eighth possible implementation manner of the third aspect, the receiver is configured to: receive, by the first network device, a reference signal of each TTI in a set of TTIs, where a reference signal of the first TTI occupies a resource size greater than or equal to a resource size occupied by a reference signal of each of the second TTIs; For the first TTI, performing channel estimation on the first TTI according to the reference signal of the first TTI; the processor, configured to use any one of the second TTIs according to any one of the TTIs a reference signal of the TTI, and all or part of the reference signals in the reference signals of the TTIs before the any one of the TTIs, performing channel estimation on the any TTI; the processor, configured to: Determining each TTI of the set of TTIs according to control information corresponding to each TTI in the set of TTIs and corresponding channel estimation results Corresponding data channels are used for demodulating and decoding the data channel to determine the reception status of the data channel corresponding to each TTI.

In conjunction with the third aspect or the first to eighth possible implementations of the third aspect, in a ninth possible implementation of the third aspect, the transmitter is configured to: the last one of the set of TTIs The response information corresponding to each TTI of the set of TTIs is sent to the first network device by using a control channel in a TTI or a TTI other than the set of TTIs.

With reference to the third aspect or the first to the nine possible implementation manners of the third aspect, in the tenth possible implementation manner of the third aspect, the transmitter is further configured to: In a TTI before a set of TTIs, scheduling information corresponding to a data channel of each TTI in the set of TTIs is sent to the first network device by using a control channel.

In a fourth aspect, a network device is provided, the network device comprising a transmitter, a receiver, and a processor, wherein:

The transmitter is configured to send, to the second network device, a data channel corresponding to each TTI of the set of TTIs of the second network device, where the receiver is configured to receive the second network device according to the data The response information corresponding to each TTI of the set of TTIs fed back by the receiving condition of the channel; the processor, configured to perform hybrid automatic repeat request HARQ processing according to the received response information.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the set of TTIs includes a first TTI and at least one second TTI, and the control channel corresponding to the first TTI carries the foregoing a process identifier of a transport block of the TTI, where the control channel corresponding to the second TTI does not carry a process identifier of the transport block; or the common control channel corresponding to the set of TTIs carries the first TTI The process identifier of the transport block, where the control channel corresponding to each TTI in the set of TTIs does not carry the process identifier of the transport block.

With reference to the fourth aspect, in a second possible implementation manner of the fourth aspect, the processor is further configured to determine time domain range information of the set of TTIs; the transmitter is further configured to Transmitting, by the second network device, a control channel of each TTI in the set of TTIs, where the control channel corresponding to the first TTI carries time domain range information of the set of TTIs; or, the transmitter is further used Transmitting, to the second network device, a common control channel corresponding to the set of TTIs, where the common control channel carries time domain range information of the set of TTIs.

With reference to the second possible implementation manner of the fourth aspect, in a third possible implementation manner of the fourth aspect, the time domain range information of the set of TTIs is: the number of TTIs in the set of TTIs, or The time interval between the first TTI and the last TTI in the set of TTIs, or the effective time range of the control information corresponding to the first TTI in the set of TTIs, or the effective time of the common control information corresponding to the set of TTIs range.

With reference to the fourth aspect or the first to third possible implementation manners of the fourth aspect, in a fourth possible implementation manner of the fourth aspect, the set of TTIs includes a first TTI and at least one second TTI, The processor is further configured to: respectively determine, according to the change information of the control information corresponding to the second TTI, the control information corresponding to the first TTI, where the change information includes: the control corresponding to the second TTI The incremental control information of the information relative to the control information corresponding to the first TTI, or the control information updated by the control information corresponding to the second TTI with respect to the control information corresponding to the first TTI; the transmitter, And transmitting, by the second network device, a control channel corresponding to each TTI in the set of TTIs, where the control channel corresponding to the first TTI carries control information corresponding to the first TTI, where each Each of the control channels corresponding to the second TTI carries change information corresponding to each of the second TTIs.

In conjunction with the fourth aspect or the first to third possible implementations of the fourth aspect, the fifth possibility in the fourth aspect In the current mode, the processor is further configured to: determine change information of control information corresponding to each TTI in the set of TTIs relative to common control information corresponding to the set of TTIs, where the change information includes: The incremental control information of the common control information of each TTI relative to the common control information corresponding to the set of TTIs, or the control of the control information corresponding to each TTI relative to the common control information corresponding to the set of TTIs The transmitter is further configured to send, to the second network device, a common control channel corresponding to the set of TTIs, and a control channel corresponding to each TTI in a set of TTIs, where the set of TTIs corresponds to a common The control channel carries the common control information corresponding to the set of TTIs, where the control channel corresponding to each TTI carries the common control information corresponding to the control information of each TTI with respect to the set of TTIs. Change information.

With reference to the fourth aspect or the first to third possible implementation manners of the fourth aspect, in a sixth possible implementation manner of the fourth aspect, the set of TTIs includes a first TTI and at least one second TTI, The transmitter is further configured to: send, to the second network device, a reference signal of each TTI in the set of TTIs, where a reference signal of the first TTI occupies a resource size greater than or equal to each of the second TTIs The size of the resource occupied by the reference signal.

In a fifth aspect, a network device is provided, where the network device includes:

a receiving module, configured to receive, by the first network device, a data channel corresponding to each TTI in a set of transmission time intervals TTI, where the set of TTIs includes a first TTI and at least one second TTI; a module, configured to acquire a first process identifier corresponding to the transport block in the first TTI, and a determining module, configured to determine, according to the first process identifier, a second process identifier of each of the at least one second TTI; a generating module, configured to generate response information corresponding to the set of TTIs respectively according to the receiving situation of the data channel corresponding to the set of TTIs; and a sending module, configured to respectively use each TTI in the set of TTIs Corresponding response information is sent to the first network device.

With reference to the fifth aspect, in a first possible implementation manner of the fifth aspect, the receiving module includes a determining submodule and a receiving submodule, where: the determining submodule is configured to acquire the set of TTIs Time domain range information, and determining, according to the time domain range information, the first TTI and the at least one second TTI included in the set of TTIs; the receiving submodule, configured to receive the A data channel corresponding to each of the first TTI and the at least one second TTI.

With reference to the first possible implementation manner of the fifth aspect, in the second possible implementation manner of the fifth aspect, the determining submodule is configured to: include, in the time domain range information, the group of TTIs If the number of TTIs is N, determining that the TTIs included in the set of TTIs are the first TTI and consecutive N-1 second TTIs after the first TTI; If the domain range information indicates a time interval between the first TTI and the last TTI in the set of TTIs, determining that the TTI included in the set of TTIs is the first TTI and in the first All the second TTIs after the TTI and in the time interval; in the case that the time domain range information indicates the effective time range of the control information corresponding to the first TTI, according to the control corresponding to the first TTI The effective time range of the information, determining that the TTI included in the set of TTIs is the first TTI and all the second TTIs that are after the first TTI and are within the effective time range of the control information; The time domain range information indicates the public control corresponding to the set of TTIs Determining, according to the effective time range of the common control information corresponding to the set of TTIs, determining that the TTI included in the set of TTIs is the first TTI and in the first All second TTIs after the TTI and within the effective time range of the common control information.

With reference to the fifth aspect or the first to the second possible implementation manners of the fifth aspect, in the third possible implementation manner of the fifth aspect, the acquiring module is configured to: acquire a preset and the first TTI The first process corresponding to the transport block in And the receiving module is configured to receive a control channel corresponding to the first TTI that is sent by the first network device, where the acquiring module is configured to acquire a first process identifier carried in the control channel, where The first process identifier is a process identifier corresponding to the transport block in the first TTI of the set of TTIs; or the acquiring module is configured to obtain the first process by using a common control channel corresponding to the set of TTIs And the first process identifier is a process identifier corresponding to the transport block in the first TTI in the set of TTIs.

With reference to the fifth aspect, in a fourth possible implementation manner of the fifth aspect, the acquiring module is configured to obtain a preset maximum number of processes, and between the first TTI and the Nth second TTI a determining module, configured to divide the sum of the first process identifier and the TTI interval N by the maximum number of processes, and obtain a remainder that is determined to be the Nth second TTI a second process identifier, where N is a positive integer; or the acquiring module is configured to obtain a preset maximum number of processes, and a TTI interval P between the first TTI and the first second TTI; a determining module, configured to divide the sum of the first process identifier and the TTI interval P by the maximum number of processes, and obtain a remainder, which is determined as a second process identifier of the first second TTI, The P is a positive integer, and the acquiring module is configured to obtain a second process identifier of the Nth second TTI, and a TTI interval Q of the N+1th second TTI and the Nth second TTI, The determining module is configured to divide the second process identifier of the Nth second TTI and the TTI interval Q by a sum of The maximum number of processes is obtained, and the obtained remainder is determined as the second process identifier of the (N+1)th second TTI, where N and Q are positive integers.

With reference to the first possible implementation manner of the fifth aspect, in a fifth possible implementation manner of the fifth aspect, the acquiring module is configured to: obtain time domain range information of the preset one set of TTIs; or The receiving module is configured to receive the control channel corresponding to the first TTI that is sent by the first network device, where the acquiring module is configured to acquire the one that is carried in the control channel corresponding to the first TTI The time domain range information of the group of TTIs; or the acquiring module, configured to acquire time domain range information of the set of TTIs by using a common control channel corresponding to the set of TTIs.

With reference to the fifth aspect or the first to fifth possible implementation manners of the fifth aspect, in a sixth possible implementation manner of the fifth aspect, the receiving module is further configured to receive, by the first network device, a control channel corresponding to each TTI in a set of TTIs, where the control channel corresponding to the first TTI carries control information corresponding to the first TTI, and each control channel corresponding to the second TTI is respectively And carrying the change information of the control information corresponding to the second TTI with respect to the control information corresponding to the first TTI, where the change information includes: the control information of the second TTI is corresponding to the first TTI Incremental control information of the control information, or control information updated by the control information corresponding to the second TTI with respect to the control information corresponding to the first TTI; the determining module is further configured to correspond to the first TTI The control information and the change information corresponding to each of the second TTIs respectively determine control information corresponding to each of the second TTIs; the determining module is further configured to: according to each TTI of the set of TTIs Control letter , A set of the data channel for each TTI corresponding to TTI, to demodulate and decode the data channel, each TTI corresponding to the determined data channel reception situation.

With reference to the fifth aspect or the first to fifth possible implementation manners of the fifth aspect, in the seventh possible implementation manner of the fifth aspect, the receiving module is further configured to receive, by the first network device, a common control channel corresponding to a set of TTIs, and a control channel corresponding to each TTI in the set of TTIs, where the common control channel corresponding to the set of TTIs carries the common control information corresponding to the set of TTIs. The control information corresponding to each TTI carries the change information of the control information corresponding to each TTI with respect to the common control information corresponding to the set of TTIs, where the change information includes: the common of each TTI Incremental control information of control information relative to common control information corresponding to the set of TTIs, or common control of control information corresponding to each TTI with respect to the set of TTIs Control information of the information update; the determining module is further configured to determine, according to the common control information corresponding to the set of TTIs and the change information corresponding to each TTI of the set of TTIs, respectively, the control corresponding to each TTI The determining module is further configured to: perform demodulation and decoding of a data channel on a data channel corresponding to each TTI in the set of TTIs according to control information corresponding to each TTI in the set of TTIs, Determining the reception status of the data channel corresponding to each TTI.

With reference to the fifth aspect or the first to fifth possible implementation manners of the fifth aspect, in the eighth possible implementation manner of the fifth aspect, the receiving module is further configured to receive, by the first network device, a reference signal of each TTI in a set of TTIs, where the reference signal of the first TTI occupies a resource size greater than or equal to a resource size occupied by a reference signal of each of the second TTIs; the network device further includes: An estimation module, configured, for the first TTI, to perform channel estimation on the first TTI according to the reference signal of the first TTI; the estimating module, configured to use, for any TTI in the second TTI, Channel estimation of any one of the TTIs according to the reference signal of any one of the TTIs and all or part of the reference signals of the reference signals of the TTIs before the any one of the TTIs; a determining module, configured to perform demodulation and translation of a data channel for each data channel corresponding to each TTI in the set of TTIs according to control information corresponding to each TTI in the set of TTIs and corresponding channel estimation results Code, determine the A receiving condition data channels corresponding to the TTI.

With reference to the fifth aspect or the first to eighth possible implementation manners of the fifth aspect, in a ninth possible implementation manner of the fifth aspect, the sending module is configured to use a last TTI in the set of TTIs The response information corresponding to each TTI of the set of TTIs is sent to the first network device by using a control channel, for example, in a TTI or a set of TTIs.

With reference to the fifth aspect or the first to the nine possible implementation manners of the fifth aspect, in the tenth possible implementation manner of the fifth aspect, the sending module is further configured to be in the first TTI or the The scheduling information corresponding to the data channel of each TTI in the set of TTIs is sent to the first network device by using a control channel in a TTI before a set of TTIs.

In a sixth aspect, a network device is provided, where the network device includes:

a sending module, configured to send, to the second network device, a data channel corresponding to each TTI of the set of TTIs of the second network device, and a receiving module, configured to receive, according to the data channel, the second network device The feedback information corresponding to each TTI in the set of TTIs is fed back; the processing module is configured to perform hybrid automatic repeat request HARQ processing according to the received response information.

With reference to the sixth aspect, in a first possible implementation manner of the sixth aspect, the set of TTIs includes a first TTI and at least one second TTI, and the control channel corresponding to the first TTI carries the foregoing a process identifier of a transport block of the TTI, where the control channel corresponding to the second TTI does not carry a process identifier of the transport block; or the common control channel corresponding to the set of TTIs carries the first TTI The process identifier of the transport block, where the control channel corresponding to each TTI in the set of TTIs does not carry the process identifier of the transport block.

With reference to the sixth aspect, in a second possible implementation manner of the sixth aspect, the network device further includes: a determining module, configured to determine time domain range information of the set of TTIs; Transmitting, to the second network device, a control channel of each TTI in the set of TTIs, where the control channel corresponding to the first TTI carries time domain range information of the set of TTIs; or, the sending The module is further configured to send, to the second network device, a common control channel corresponding to the set of TTIs, where the common control channel carries time domain range information of the set of TTIs.

With reference to the second possible implementation manner of the sixth aspect, in a third possible implementation manner of the sixth aspect, the time domain range information of the set of TTIs is: the number of TTIs in the set of TTIs, or The time interval between the first TTI and the last TTI in the set of TTIs, or the effective time range of the control information corresponding to the first TTI in the set of TTIs, or the effective time of the common control information corresponding to the set of TTIs range.

With reference to the sixth aspect or the first to third possible implementation manners of the sixth aspect, in a fourth possible implementation manner of the sixth aspect, the set of TTIs includes a first TTI and at least one second TTI, a determining module, configured to determine, respectively, change information of control information corresponding to each of the second TTIs, and control information corresponding to the first TTI, where the change information includes: control corresponding to the second TTI The incremental control information of the information relative to the control information corresponding to the first TTI, or the control information updated by the control information corresponding to the second TTI with respect to the control information corresponding to the first TTI;

The sending module is further configured to send, to the second network device, a control channel corresponding to each TTI in the set of TTIs, where the control channel corresponding to the first TTI carries the control corresponding to the first TTI And information, each of the control channels corresponding to the second TTI carries change information corresponding to each of the second TTIs.

With reference to the sixth aspect or the first to third possible implementation manners of the sixth aspect, in a fifth possible implementation manner of the sixth aspect, the determining module is further configured to determine each TTI in the set of TTIs Corresponding control information, with respect to the change information of the common control information corresponding to the set of TTIs, the change information includes: an increment of the common control information of each TTI relative to the common control information corresponding to the set of TTIs Control information, or control information that is updated by the control information corresponding to each TTI with respect to the common control information corresponding to the set of TTIs; the sending module is further configured to send the group to the second network device a common control channel corresponding to the TTI, and a control channel corresponding to each TTI in the set of TTIs, where the common control channel corresponding to the set of TTIs carries common control information corresponding to the set of TTIs, where each TTI corresponds to The control channel carries the change information of the control information corresponding to each TTI with respect to the common control information corresponding to the set of TTIs.

With reference to the sixth aspect or the first to third possible implementation manners of the sixth aspect, in a sixth possible implementation manner of the sixth aspect, the set of TTIs includes a first TTI and at least one second TTI, The sending module is further configured to: send, to the second network device, a reference signal of each TTI in the set of TTIs, where a reference signal of the first TTI occupies a resource size greater than or equal to each of the second The resource size occupied by the TTI reference signal.

In a seventh aspect, a system for data transmission is provided, the system comprising a first network device and a second network device, wherein:

The first network device is configured to send, to the second network device, a data channel corresponding to each TTI of a set of TTIs of the second network device; and receive, according to the data channel, the second network device The response information corresponding to each TTI in the set of TTIs fed back; the hybrid automatic repeat request HARQ process is performed according to the received response information; the second network device is configured to receive the first network device And a data channel corresponding to each TTI in a set of transmission time interval TTIs, wherein the set of TTIs includes a first TTI and at least one second TTI; and obtaining a transport block in the first TTI And corresponding to the first process identifier, and determining, according to the first process identifier, a second process identifier of each of the at least one second TTI; and generating, according to the receiving situation of the data channel corresponding to the group of TTIs respectively The response information corresponding to each group of TTIs is respectively sent to the first network device, and the response information corresponding to each TTI in the set of TTIs is sent to the first network device.

The beneficial effects brought by the technical solutions provided by the embodiments of the present invention are:

In the embodiment of the present invention, the second network device receives, by the first network device, a data channel corresponding to each TTI in a set of transmission time intervals TTI, where the set of TTIs includes the first TTI and the at least one second Determining, by the TTI, a first process identifier corresponding to the transport block in the first TTI, and determining, according to the first process identifier, a second process identifier of each of the at least one second TTI, according to receiving the data channel corresponding to the group of TTIs respectively In the case, the response information corresponding to each group of TTIs is generated, and the response information corresponding to each TTI in the set of TTIs is sent to the first network device. In this way, when the first network device transmits a set of TTI data to the second network device, it does not need to carry the process identifier of the transport block of each TTI, thereby saving a large amount of transmission resources.

The above general description and the following detailed description are intended to be illustrative and not restrictive.

DRAWINGS

1(a) is a schematic diagram of a system framework provided by an embodiment of the present invention;

1(b) is a schematic diagram of a system framework provided by an embodiment of the present invention;

2 is a schematic structural diagram of a second network device according to an embodiment of the present invention;

3 is a schematic structural diagram of a first network device according to an embodiment of the present invention;

4 is a flowchart of a method for data transmission according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of downlink transmission of an FDD according to an embodiment of the present invention; FIG.

FIG. 6 is a schematic diagram of downlink transmission of TDD according to an embodiment of the present invention; FIG.

FIG. 7(a) is a schematic diagram of TDD downlink feedback hybrid automatic repeat request response information provided by an embodiment of the present invention;

FIG. 7(b) is a schematic diagram of TDD uplink feedback hybrid automatic repeat request response information provided by an embodiment of the present invention;

FIG. 8(a) is a schematic diagram of TDD downlink feedback hybrid automatic repeat request response information provided by an embodiment of the present invention;

FIG. 8(b) is a schematic diagram of TDD uplink feedback hybrid automatic repeat request response information provided by an embodiment of the present invention;

FIG. 9 is a flowchart of transmission control information according to an embodiment of the present invention;

FIG. 10 is a flowchart of transmission control information according to an embodiment of the present invention;

11 is a schematic diagram of public control information of FDD downlink transmission according to an embodiment of the present invention;

FIG. 12 is a schematic diagram of TDD downlink transmission common control information according to an embodiment of the present invention; FIG.

FIG. 13 is a flowchart of a transmission reference signal according to an embodiment of the present invention;

14 is a flowchart of a transmission reference signal according to an embodiment of the present invention;

FIG. 15 is a schematic diagram of TDD uplink transmission scheduling information according to an embodiment of the present invention;

FIG. 16 is a schematic structural diagram of a second network device according to an embodiment of the present disclosure;

FIG. 17 is a schematic structural diagram of a second network device according to an embodiment of the present disclosure;

FIG. 18 is a schematic structural diagram of a second network device according to an embodiment of the present invention;

FIG. 19 is a schematic structural diagram of a first network device according to an embodiment of the present invention;

FIG. 20 is a schematic structural diagram of a first network device according to an embodiment of the present invention.

detailed description

The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

An embodiment of the present invention provides a data transmission method, which may be configured by a first network device and a second network. Prepare for common implementation. The first network device and the second network device may be a terminal or a base station. When the first network device is a base station, the second network device may be a terminal, and when the first network device is a terminal, the second network device may be Base station. The terminal may also be referred to as a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (Mobile Terminal), etc., for example, the terminal may be a mobile phone, a computer having a mobile terminal, etc., for example, a terminal. It can also be a portable, pocket, handheld, computer built-in or in-vehicle mobile device that exchanges language and/or data with the wireless access network. The base station may be a Base Transceiver Station (BTS) in GSM or CDMA, or may be a base station (NodeB, NB) in WCDMA, or may be an evolved Node B (eNB or e-NodeB) in LTE. . The first network device may send a data channel of each TTI in a set of TTIs to the second network device, where the second network device may receive data corresponding to each TTI in the set of transmission time intervals TTI sent by the first network device. a channel, wherein the set of TTIs includes the first TTI and the at least one second TTI; the second network device may acquire the first process identifier corresponding to the transport block in the first TTI, and determine at least one according to the first process identifier The second process identifier of each of the two TTIs, and then generates response information corresponding to a group of TTIs respectively according to the reception status of the data channels corresponding to the group of TTIs, and the first network device receives the reception status of the second network device according to the data channel. And the feedback information corresponding to each TTI in the set of TTIs is fed back, and the hybrid automatic repeat request HARQ process is performed according to the received response information. As shown in Fig. 1(a) and 1(b), Fig. 1(a) shows downlink transmission, that is, the base station transmits data information to the terminal, and Fig. 1(b) shows uplink transmission, that is, the terminal transmits data information to the base station. .

The second network device may include a receiver 210, a processor 220, a transmitter 230, and the receiver 210 and the transmitter 230 may be respectively connected to the processor 220, as shown in FIG. Receiver 210 can be used to receive messages or data. Receiver 210 can include, but is not limited to, an antenna, at least one amplifier, a tuner, one or more oscillators, a coupler, a Low Noise Amplifier (LNA), a dual Tools, etc. The processor 220 can be a control center of the second network device that connects various portions of the entire second network device, such as the receiver 210 and the transmitter 230, using various interfaces and lines. In the embodiment of the present invention, the processor 220 may be configured to determine a process for processing a process identifier of a transport block in a set of TTIs. Optionally, the processor 220 may include one or more processing units; optionally, the processor 220 The application processor and the modem processor can be integrated, wherein the application processor mainly processes the operating system, the modem processor mainly processes the wireless communication, and the processor 220 can also be a digital signal processor, an application specific integrated circuit, and a field programmable Gate arrays or other programmable logic devices.

The first network device may include a processor 310, a transmitter 320, a receiver 330, and the transmitter 320 and the receiver 330 may be respectively connected to the processor 310, as shown in FIG. Receiver 330 can be used to receive messages or data, and receiver 330 can include, but is not limited to, an antenna, at least one amplifier, a tuner, one or more oscillators, a coupler, an LNA, a duplexer, and the like. In the embodiment of the present invention, the processor 310 may be configured to schedule a TTI related process for the terminal, or determine a set of TTIs corresponding to the second network device, and the processor 310 may include one or more processing units; the processor 310 It can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; or a digital signal processor (DSP) or an application specific integrated circuit (Application Specific) Integrated Circuit (ASIC), Field Programmable Gate Array (FPGA) or other programmable logic devices. In particular, the program can include program code, the program code including computer operating instructions.

The technical solutions of the embodiments of the present invention can be applied to various communication systems, such as a Long Term Evolution (LTE) system, an LTE Frequency Division Duplex (FDD) system, and an LTE time division. Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), and other wireless communication systems using Orthogonal Frequency Division Multiplexing (OFDM) technology.

In order to facilitate the understanding of the embodiments of the present invention, the basic concepts involved in the embodiments of the present invention are first described below. The LTE system is taken as an example, but the embodiment of the present invention is not applicable to the LTE system. In fact, any wireless communication system that performs data transmission by scheduling may adopt the solution provided by the embodiment of the present invention.

First, the data channel

The data channel can be used to carry data information, which can be an uplink data channel or a downlink data channel.

Second, the control channel

The Control Channel (CCH) can be used to carry control information. The control channel can be a Broadcast Control Channel (BCCH), a Common Control Channel (CCCH), and a Dedicated Control Channel (DCCH). In the embodiment of the present invention, the control channel is a dedicated control channel.

Third, the reference signal

Reference Signal (RS) is used in the physical layer and does not carry data information, such as Demodulation Reference Signal (DMRS) for uplink, and Sounding Reference Signal (SRS) for downlink. A Cell-specific Reference Signal (CRS) is used for a downlink UE-specific Reference Signal (URS) or a Group-specific Reference Signal (GRS) for downlink.

As shown in FIG. 4, the embodiment of the present invention is described in detail by taking a first network device as a base station and a second network device as a terminal. The processing procedure of the method may include the following steps:

In step 401, the first network device sends, to the second network device, a data channel corresponding to each TTI of the set of TTIs of the second network device.

In an implementation, when the first network device schedules a group of TTIs to transmit data to the second network device, the first network device may determine a set of TTIs scheduled by the second network device, and the set of TTIs may include multiple TTIs. The TTIs may be consecutive in the time domain or may be discontinuous in the time domain. The multiple TTIs are associated with each other. For example, if the control information corresponding to each TTI has the same part, the first network device may send the determination to the second network device. a data channel of each TTI in a set of TTIs, where the data channel of each TTI carries corresponding data, and the first network device may carry the indication that the TTI is in the control information corresponding to the first TTI of each group of TTIs. The identifier of the first TTI.

In step 402, the second network device receives, by the first network device, a data channel corresponding to each TTI in a set of transmission time intervals TTI, where the set of TTIs includes the first TTI and the at least one second TTI.

The first TTI is the first TTI, and the first TTI is the first TTI in the set of TTIs, and the second TTI is the other TTIs except the first TTI in the set of TTIs.

In an implementation, the second network device may view the identifier of the network device corresponding to each TTI, and if the identifier of the network device in the TTI is the identifier of the second network device, receive the data channel of the TTI, if a TTI The identifier of the network device in the network is not the identifier of the second network device, and the data channel of the TTI is not received. In this way, the second network device can receive a data channel corresponding to each TTI in a set of TTIs, where the data channel carries data transmitted by the first network device to the second network device.

Optionally, the second network device may determine each TTI in a set of TTIs according to a time domain range corresponding to the set of TTIs, and the corresponding step 402 may be processed as follows:

The second network device acquires the time domain range information of the set of TTIs, and determines the first TTI and the at least one second TTI included in the set of TTIs according to the time domain range information;

Receiving respective data channels corresponding to the first TTI and the at least one second TTI, respectively.

The time domain range information is used to directly or indirectly reflect the range of the TTI in the time domain. The time domain range information may be the number of TTIs in a group of TTIs, that is, how many TTIs are included in a group of TTIs. Or the time interval between the first TTI and the last TTI in a set of TTIs, that is, the time interval between receiving the first TTI and receiving the last TTI in a set of TTIs, or the control information corresponding to the first TTI in a set of TTIs The effective time range or the effective time range of the common control information corresponding to a set of TTIs. The detailed explanation is described in detail later.

In an implementation, the second network device may acquire time domain range information of a set of TTIs (method of acquiring time domain range information is described in detail later), and then determine each of a set of TTIs according to time domain range information of a set of TTIs. Second TTI. The second network device may respectively receive the first TTI sent by the first network device, and each second TTI.

Optionally, there are several ways to obtain time domain range information. Several possible ways are given below:

In a first manner, the second network device acquires time domain range information of a preset set of TTIs.

In an implementation, the technician may preset the time domain range information of the set of TTIs that the first network device schedules for the second network device, and store the information into the first network device and the second network device, where the second network device receives the corresponding After the data channel of the first TTI in a set of TTIs, the second network device may obtain preset time domain range information of each group of TTIs.

In the second mode, the second network device receives the control channel corresponding to the first TTI that is sent by the first network device, and acquires time domain range information of a group of TTIs carried in the control channel corresponding to the first TTI.

In an implementation, when the first network device schedules a set of TTIs for the second network device, the first network device may carry the time domain range information in the control channel corresponding to the first TTI in the set of TTIs. After receiving the control channel corresponding to the first TTI in the TTI, the second network device may obtain the time domain range information carried in the control channel corresponding to the first TTI, and use the time domain range information of the set of TTIs.

In the third mode, the second network device obtains time domain range information of a set of TTIs through a common control channel corresponding to the TTI.

In an implementation, each time the first network device schedules a set of TTIs for the second network device, the first network device may carry time domain range information of a set of TTIs in a common control channel corresponding to the set of TTIs. After receiving the common control channel corresponding to the TTI, the second network device may obtain the time domain range information carried in the common control channel corresponding to the TTI and use it as the time domain range information of the TTI.

In addition, for the two cases of the foregoing mode 2 and mode 3, the first network device may also carry the time domain range of each group of TTIs only in the control channel corresponding to the first TTI in the first group of TTIs scheduled for the second network device. The information, when the second network device obtains the time domain range information carried by the control channel corresponding to the first TTI in the first group of TTIs, the time domain range information may be used as each group scheduled by the first network device for the second network device. The time domain range information of the TTI, the first network device does not carry the time domain range information of a set of TTIs in the control channel corresponding to the first TTI in each group of TTIs scheduled for the second network device. Alternatively, the first network device may also carry the time domain range information of each group of TTIs only in the common control channel corresponding to the first group of TTIs scheduled for the second network device, and when the second network device receives the first group of TTIs, Time domain range information carried by the common control channel, the time domain range information may be used as time domain range information of each group of TTIs scheduled by the first network device for the second network device, and the first network device is next Network equipment The time domain range information of a set of TTIs is no longer carried in the common control channel corresponding to each group of TTIs.

Optionally, the first TTI and the at least one second TTI in the set of TTIs are determined according to the time domain range information of the set of TTIs, and may include any one of the following conditions:

When the time domain range information indicates that the number of TTIs included in a group of TTIs is N, determining that the TTIs included in one set of TTIs are the first TTI and the consecutive N-1 second TTIs after the first TTI ;

In the case that the time domain range information indicates the time interval between the first TTI and the last TTI in a set of TTIs, it is determined that the TTI included in the set of TTIs is the first TTI and after the first TTI and at the time interval All second TTIs within;

When the time domain range information indicates the effective time range of the control information corresponding to the first TTI, determining, according to the effective time range of the control information corresponding to the first TTI, determining that the TTI included in the set of TTIs is the first TTI and All second TTIs after the first TTI and within the effective time range of the control information;

When the time domain range information indicates the effective time range of the common control information corresponding to the TTI, the TTI included in the TTI is determined to be the first TTI according to the effective time range of the common control information corresponding to the TTI. And all second TTIs after the first TTI and within the effective time range of the common control information.

In an implementation, the time domain range information may be the number of TTIs in a set of TTIs, the second network device may obtain the number N of a set of TTIs, and the second network device receives the Nth after determining the first TTI in the set of TTIs. - 1 TTI, which is the second TTI of the set of TTIs except the first TTI.

Alternatively, the time domain range information may be a time interval between the first TTI and the last TTI in the set of TTIs, and the second network device may obtain a time interval between the first TTI and the last TTI in the first TTI, at the time. In the time range corresponding to the interval, in addition to the first TTI, the second network device receives the TTI corresponding to the self-scheduling, that is, all the second TTIs except the first TTI in the group of TTIs.

Alternatively, the time domain range information may be an effective time range of the control information corresponding to the first TTI, and the second network device may obtain an effective time range of the control information corresponding to the first TTI, where the first TTI is included in the effective time range. The second network device receives the TTI scheduled by the first network device, that is, all the second TTIs except a first TTI in a group of TTIs. For example, if the control information effective time range of the first TTI is 10 minutes, the second network device starts timing from the data channel that receives the first TTI, and the TTI received within 10 minutes is the first TTI of the group of TTIs. All second TTIs outside.

Alternatively, the time domain range information may be a valid time range of the common control information corresponding to the TTI, and the second network device may obtain the effective time range of the common control information corresponding to the TTI, in the effective time range, except the first The TTI, the second network device receives the TTI corresponding to itself, that is, all TTIs except a first TTI in a group of TTIs. For example, if the control information effective time range of a group of TTIs is 10 minutes, the second network device starts counting from the data channel that receives the first TTI, and the TTI received within 10 minutes is all TTIs in a group of TTIs. The first TTI is included, and at least one second TTI is also included.

In step 403, the second network device acquires a first process identifier corresponding to the transport block in the first TTI, and determines a second process identifier of each of the at least one second TTI according to the first process identifier.

The first process identifier is a process identifier corresponding to the transport block in the first TTI in the set of TTIs.

In an implementation, the second network device, in the control information of the received TTI, parses the identifier indicating that the TTI is the first TTI, determines that the TTI is the first TTI, and then the second network device can obtain the first The first process identifier corresponding to the transport block in the TTI, and when the second TTI is subsequently received, the second process of the second TTI may be determined. The process of determining the first process identifier and the second process identifier is described in detail later.

Optionally, there are multiple manners for the second network device to obtain the first process identifier corresponding to the transport block in the first TTI, and three optional manners are given as follows:

In a first manner, the second network device acquires a preset first process identifier corresponding to the transport block in the first TTI.

In an implementation, the technician may preset, in the first network device and the second network device, a first process identifier corresponding to the transport block in the first TTI in each group of TTIs, and store the first process identifiers on the first network device and the second network device. For example, the first process identifier corresponding to the transport block in the first TTI in each group of TTIs may be preset to be 0, and stored in the first network device and the second network device, when the second network device or the second network When the device receives the data channel of the first TTI in the TTI, the device may determine that the first process identifier corresponding to the transport block in the first TTI is 0.

In the second mode, the second network device receives the control channel corresponding to the first TTI sent by the first network device, and obtains the first process identifier carried in the control channel, where the first process identifier is a transport block corresponding to the first TTI in the set of TTIs. Process ID.

In an implementation, when the first network device schedules a group of TTIs to transmit data to the second network device, each TTI of the group of TTIs corresponds to the control channel, and the control channel may carry control information, where the control information may include resource allocation information and The modulation coding mode and the like may also carry the first process identifier corresponding to the transport block in the first TTI in the control channel corresponding to the first TTI in each group of TTIs. The second network device may receive the control channel corresponding to the first TTI, where the control channel carries the first process identifier of the transport block in the first TTI, and the second network device obtains the transmission in the first TTI from the control channel. The first process ID of the block.

In the third mode, the second network device obtains the first process identifier by using a common control channel corresponding to the TTI, where the first process identifier is a process identifier corresponding to the transport block in the first TTI in the group of TTIs.

In an implementation, when the first network device schedules a group of TTIs to transmit data to the second network device, each group of TTIs may have a common control channel, and the common control channel corresponding to a group of TTIs may be before a group of TTIs, or first In the TTI, the first network device transmits to the second network device. The first network device may carry the first process identifier corresponding to the transport block in the first TTI in the common control channel. The second network device may receive a common control channel corresponding to a set of TTIs, where the common control channel carries a first process identifier corresponding to the transport block in the first TTI of the set of TTIs. The second network device may further receive a common control channel corresponding to the set of TTIs that the first network device schedules for the second network device, and then obtain, from the common control channel, the first process corresponding to the transport block in the first TTI that is carried. Logo.

Optionally, according to the first process identifier, there are multiple ways to determine the second process identifier of each of the at least one second TTI. Two possible ways are as follows:

In the first manner, the preset maximum number of processes is obtained, and the TTI interval N between the first TTI and the Nth second TTI is obtained; the sum of the first process identifier and the TTI interval N is divided by the maximum number of processes, and the remainder is obtained. And determining a second process identifier of the Nth second TTI, where N is a positive integer.

In an implementation, the technician can preset the maximum number of processes and store them in the first network device and the second network device. The second network device receives the data channel of the Nth second TTI, and can obtain the maximum number of processes stored in advance, and divides the time between receiving the first TTI and the time of receiving the Nth second TTI. Taking a TTI, the obtained quotient, determining that the TTI interval between the second TTI and the first TTI is N, and then dividing the sum of the first process identifier and the TTI interval N by the maximum number of processes, and obtaining the remainder, The second process identifier of the Nth second TTI. For example, the preset maximum number of processes is 3, the first process identifier is 0, the time interval between the time when the first TTI is received and the time when the second second TTI is received is 30 ms, divided by one TTI (10 ms), The quotient obtained is 3, the first TTI and the second second The TTI interval N between the TTIs is 3. The first process identifier 0 and the TTI interval 3 are added to obtain 3, divided by the maximum number of processes 3, and the obtained remainder is 0. Then, the second second TTI is second. The process ID is 0.

For example, as shown in FIG. 5, for an FDD system, one TTI corresponds to one transport block, and one Round Trip Time (RTT) includes two TTIs (with the process ID being 0 and the process ID being 1 as an example). The number of processes is 2, the first network device schedules a TTI in the TTI for the second network device, and the process identifier of the transport block in which the second network device obtains the first TTI is 0, and receives the first second. After the data channel of the TTI, the process identifier of the transport block that determines the first second TTI is calculated to be 1 according to the process identifier 0, the maximum number of processes, and the TTI interval of the first TTI, and the second second TTI is received. After the data channel, the process identifier of the transport block of the second second TTI is determined to be 0 according to the process identifier 0, the maximum number of processes, and the TTI interval of the first TTI, and so on, determining the second TTI in the set of TTIs. Process ID.

In the second manner, the preset maximum number of processes is obtained, and the TTI interval P between the first TTI and the first second TTI is obtained; the sum of the first process identifier and the TTI interval P is divided by the maximum number of processes, and the remainder is obtained. Determining, as a second process identifier of the first second TTI, where P is a positive integer;

Obtaining a second process identifier of the Nth second TTI, and a TTI interval Q of the N+1 second TTI and the Nth second TTI, and setting a second process identifier of the Nth second TTI to the TTI interval Q The sum is divided by the maximum number of processes, and the obtained remainder is determined as the second process identifier of the N+1th second TTI, where N and Q are positive integers.

In an implementation, the technician can preset the maximum number of processes and store them in the first network device and the second network device. When receiving the data channel of the first second TTI, the second network device may acquire the preset maximum number of processes, and the time interval between the time when the first TTI is received and the time when the first second TTI is received Dividing by a TTI, the obtained quotient is determined as the TTI interval P between the first TTI and the first second TTI, and then the sum of the TTI interval P and the first process identifier is divided by the preset maximum number of processes. The remainder obtained is the second process identifier of the first second TTI.

The second network device has received the data channel of the Nth second TTI before receiving the data channel of the (N+1)th second TTI, and the second network device determines the second of the N+1th second TTI When the process is identified, the maximum number of processes stored in advance may be obtained, and the second process identifier of the Nth second TTI determined before is obtained, and then the time of receiving the Nth second TTI and the time of the N+1th TTI are received. The time interval is divided by a TTI, and the obtained quotient is determined as the TTI interval Q of the Nth second TTI and the N+1th second TTI, and the second process identifier of the Nth second TTI is separated from the TTI. The sum of Q is divided by the preset maximum number of processes, and the remainder obtained is the second process identifier of the N+1th second TTI. For example, the preset maximum number of processes is 4, the time interval between the third second TTI and the fourth second TTI is 30 ms, one TTI is 10 ms, and the third second TTI and the fourth The time interval between the two TTIs is 3 TTIs, and the second process ID of the third second TTI is 3, and the second process ID of the fourth second TTI is 2.

For example, as shown in FIG. 6 , for a TDD system, one TTI corresponds to one transport block, and one RTT includes two TTIs (with the process ID being 0 and the process ID being 1 as an example), and the maximum number of processes is 2, the first network. The device schedules, for the second network device, a set of TTIs that include three TTIs, and the second network device obtains the process identifier of the transport block of the first TTI to be 0, and after receiving the data channel of the first second TTI, may determine The process identifier of the transport block of the first second TTI is 1. After receiving the data channel of the second second TTI, the second process ID 1 of the first second TTI may be added to the TTI interval 1. Dividing by the maximum number of processes 2, the remainder is 0, the process identifier of the second second TTI transport block is 0, and so on, determining the process identifier of the second TTI in a set of TTIs.

In step 404, the second network device generates response information corresponding to a group of TTIs according to the reception status of the data channels corresponding to a group of TTIs.

In an implementation, the second network device may perform demodulation and decoding processing on the data channel for receiving the data channel corresponding to each TTI in the set of TTIs, and determine whether the data channel can be correctly demodulated or decoded. If the data channel corresponding to a TTI can be correctly demodulated and correctly decoded, it is determined that the response information corresponding to the TTI is an ACK. If the data channel corresponding to a TTI cannot be correctly demodulated, or cannot be correctly decoded, then it is determined. The response information corresponding to the TTI is NACK, so that the response information corresponding to each TTI in a group of TTIs can be determined.

In step 405, the second network device sends response information corresponding to each TTI in a set of TTIs to the first network device.

In an implementation, for the FDD, the first TTI and the at least one second TTI are included in the TTI, and the second network device receives the data channel of the first TTI and determines the response information corresponding to the first TTI. The response information of the TTI is sent to the first network device, and the first second TTI is received, the response information of the first second TTI is determined, and then the response information corresponding to the first second TTI is sent to the first network device. And so on, sending response information corresponding to each TTI in a set of TTIs to the first network device.

For the TDD, the first TTI and the at least one second TTI are included in the TTI, the second network device receives the data channel of the first TTI, and determines the response information corresponding to the first TTI, and the second network device may The transmission is switched to the uplink transmission, and the response information corresponding to the first TTI is sent to the first network device. When the second network device receives the first second TTI sent by the first network device, the uplink transmission may be switched to the downlink transmission, and the data channel of the first second TTI is received, and the response of the first second TTI is determined. After the information is transmitted, the second network device switches the downlink transmission to the uplink transmission, and sends the response information corresponding to the first second TTI to the first network device. And so on, the response information corresponding to each TTI in a set of TTIs is sent to the first network device.

Optionally, for TDD, a method for feeding back response information corresponding to data information of each TTI in a set of TTIs is provided. Correspondingly, the processing of step 405 may be as follows:

The response information corresponding to each TTI in a set of TTIs is sent to the first network device by using a control channel in a TTI in a TTI or a TTI in a group of TTIs.

In an implementation, the first network device transmits data to the second network device, and after receiving the first TTI in the set of TTIs, the second network device may determine data of all TTIs in a set of TTIs according to the time domain range information. After the channel is all received, the response information corresponding to each TTI can be obtained, and the second network device can feed back the response information corresponding to each TTI in the TTI to the first network device by using any one of the TTIs. The switching overhead of downlink transmission and uplink transmission can be reduced. However, in order to reduce the data buffer, the second network device may feed back the response information corresponding to each TTI in the set of TTIs to the first network device in the first TTI after the set of TTIs. For example, as shown in FIG. 7(a) and FIG. 7(b), the first network device schedules, for the second network device, a set of TTIs that include two TTIs, and the second network device can receive the first TTI of the set of TTIs. After receiving the second TTI scheduled by the first network device for the second network device, the second network device may feed back, by using one TTI, the response information corresponding to the two TTIs in the set of TTIs to the first network device, where 7(a) and 7(b) show TDD downlink transmission and TDD uplink transmission, respectively.

Alternatively, the second network device may also feed back, to the first network device, response information corresponding to each TTI in a set of TTIs in a last TTI in a set of TTIs, that is, a set of TTIs includes N TTIs, first The TTI to the N-1th second TTI is a downlink transmission, and the Nth second TTI is switched to the uplink transmission after the downlink data channel is transmitted, so that the second network device does not need to receive a downlink every time a TTI is received. The transmission is switched to the uplink transmission, so that the switching overhead of the downlink transmission and the uplink transmission can be reduced. For example, as shown in FIG. 12(b) and FIG. 13(b), the first network device schedules, for the second network device, a set of TTIs that include two TTIs, and the second network device can receive the second TTI of the set of TTIs. of After the data channel, the downlink transmission is switched to the uplink transmission, and the response information corresponding to the two TTIs in the TTI is fed back to the first network device, where FIG. 8(a) and FIG. 8(b) respectively represent the TDD downlink transmission and the TDD. Uplink transmission.

In step 406, the first network device receives the response information corresponding to each TTI in the set of TTIs that the second network device feeds back according to the reception condition of the data channel.

In step 407, the first network device performs hybrid automatic repeat request HARQ processing according to the received response information.

In an implementation, for a certain TTI, if the response information received by the first network device is an ACK, the new data may be transmitted on the transport block when the transport block corresponding to the process identifier of the TTI is transmitted next time, the second network. The device can perform the processing of steps 402 to 405.

For a certain TTI, if the response information received by the first network device is a NACK, the maximum number of retransmissions corresponding to the TTI is obtained. If the maximum number of retransmissions is not exceeded, the transmission corresponding to the process identifier of the TTI may be transmitted next time. In the case of a block, the data corresponding to the TTI is retransmitted on the transport block. When the second network device receives the TTI corresponding to the process identifier of the last feedback NACK response information, the process may identify the two TTI data channels corresponding to the process. The data is merged, and then the processing of steps 404 to 405 is performed.

In the embodiment of the present invention, a method for transmitting control information and determining a receiving condition of a data channel corresponding to a set of TTIs according to the control information is further provided. As shown in FIG. 9, the corresponding processing may be as follows:

In step 901, the first network device determines, respectively, change information of the control information corresponding to each second TTI with respect to the control information corresponding to the first TTI.

The change information includes: incremental control information of the control information corresponding to the second TTI with respect to the control information corresponding to the first TTI, or control information updated by the control information corresponding to the second TTI with respect to the control information corresponding to the first TTI. For example, if the control information corresponding to a certain second TTI adds a part of the control information to the control information corresponding to the first TTI, the change information is the added part of the control information, or the control information corresponding to a certain second TTI is relative to the control information. The control information corresponding to the first TTI updates a part of the control information, and the change information is part of the updated control information.

In an implementation, when the first network device sends a set of TTIs for the second network device, the first network device may first determine control information corresponding to the first TTI, and then determine control information corresponding to each second TTI with respect to the first The change information of the control information corresponding to the TTI. For example, if the control information corresponding to the second TTI adds a part of the control information to the control information corresponding to the first TTI, the control information carried in the control channel corresponding to the second TTI is part of the foregoing control information.

In step 902, the first network device sends a control channel corresponding to each TTI in the TTI to the second network device, where the control channel corresponding to the first TTI carries control information corresponding to the first TTI, and each second TTI corresponds to Each of the control channels carries change information corresponding to each second TTI.

In an implementation, the first network device may send, to the second network device, a control channel corresponding to each TTI in the set of TTIs, where the control channel corresponding to the first TTI carries control information corresponding to the first TTI, and each second TTI The corresponding control channel carries change information corresponding to each second TTI. In this way, the first network device does not need to send all the control information corresponding to each second TTI to the second network device, so that a large amount of transmission resources can be saved.

In addition, when a certain TTI in the second TTI corresponds to a retransmission on a certain process, the TTI may not correspond to the control channel, but inherit the control information in the control channel corresponding to the previous TTI in the process. For example, a set of TTIs includes 4 TTIs, a process identifier of a transport block of the first TTI is 0, and a process identifier of a transport block of the first second TTI is 1 and a second The process identifier of the transport block of the second TTI is 0, and the process identifier of the transport block of the second second TTI is 1. When the feedback information corresponding to the transport block of the first TTI is NACK, it indicates that the error is received, and the second The retransmission of the second TTI does not exceed the maximum number of retransmissions. In this case, when the second second TTI is corresponding to the retransmission, the TTI may not correspond to the control channel, and the control information in the control channel corresponding to the first TTI is used. , saving the transmission of the control channel.

In step 903, the second network device receives the control channel corresponding to each TTI in the set of TTIs sent by the first network device.

The control channel corresponding to the first TTI carries the control information corresponding to the first TTI, and the control channel corresponding to each second TTI carries control corresponding to the control information corresponding to the first TTI. Information change information.

In step 904, the second network device determines the control information corresponding to each second TTI according to the control information corresponding to the first TTI and the change information corresponding to each second TTI.

In an implementation, when the second network device determines the control information of the second TTI in the TTI, the change information corresponding to the TTI is the increment of the control information corresponding to the TTI and the control information corresponding to the first TTI. Control information, the control information corresponding to the first TTI and the change information corresponding to the TTI may be used as the control information corresponding to the TTI; if the change information corresponding to the TTI is the control information corresponding to the TTI, corresponding to the first TTI For the control information of the control information update, the partial control information and the change information corresponding to the TTI in the control information corresponding to the TTI in the control information corresponding to the first TTI may be used as the control information corresponding to the TTI. In this way, the control information corresponding to each second TTI can be determined.

For example, after receiving the control channel of the first TTI in the TTI, the second network device may obtain the control information, and obtain the TTI corresponding to the control channel corresponding to the first second TTI in the TTI. The change information, if the change information corresponding to the first second TTI is the incremental control information, the control information corresponding to the first TTI and the change information corresponding to the first second TTI may be used as the first second TTI. Control information, if the change information corresponding to the first second TTI is the updated control information, the control information corresponding to the first second TTI may be the same as the control information corresponding to the first TTI, and the first part The change information corresponding to the second TTI is used as the control information corresponding to the first second TTITTI.

In addition, when a TTI in a second TTI of a group of TTIs is corresponding to a retransmission on a certain process, the TTI may correspond to a control channel, and the control information of the TTI may be in the control channel corresponding to the previous TTI in the process. Control information.

In step 905, the second network device performs demodulation and decoding of the data channel for each data channel corresponding to each TTI in a set of TTIs according to control information corresponding to each TTI in the set of TTIs, and determines corresponding to each TTI. The reception of the data channel.

In an implementation, the second network device may perform demodulation on a data channel corresponding to each TTI in a set of TTIs by using control information corresponding to each TTI in a set of TTIs, and then decode the demodulated data channels. And determining whether the data channel corresponding to each TTI is correctly decoded, thereby obtaining the reception condition of the data channel corresponding to each TTI.

In another embodiment of the present application, another method for transmitting control information and determining a receiving condition of a data channel corresponding to a group of TTIs according to the control information is further provided. As shown in FIG. 10, the corresponding processing may be as follows:

In step 1001, the first network device determines change information of control information corresponding to each TTI in a set of TTIs relative to common control information corresponding to a group of TTIs.

The change information includes: common control information corresponding to each TTI with respect to a common control information of a set of TTIs The incremental control information, or the control information updated by the control information corresponding to each TTI with respect to the common control information corresponding to a set of TTIs. For example, if the control information corresponding to a certain TTI adds a part of the control information to the common control information corresponding to the TTI, the change information is an added part of the control information, or the control information corresponding to a certain TTI corresponds to a set of TTIs. The common control information updates a part of the control information, and the change information is part of the updated control information.

In an implementation, when the first network device sends a set of TTIs for the second network device, the first network device may first determine common control information corresponding to a set of TTIs, and then determine that the control information corresponding to each TTI in the set of TTIs is relatively Change information of common control information corresponding to a set of TTIs. For example, if the control information corresponding to a certain TTI adds a part of the control information to the common control information corresponding to the TTI, the control information carried in the control channel corresponding to the TTI is part of the control information.

In the step 1002, the first network device sends a common control channel corresponding to the TTI to the second network device, and a control channel corresponding to each TTI in the TTI. The common control channel corresponding to the TTI carries a set of TTIs. The common control information, the control channel corresponding to each TTI carries the change information of the control information corresponding to each TTI with respect to the common control information corresponding to a group of TTIs.

In an implementation, the first network device may send a common control channel corresponding to a set of TTIs to the second network device, and a control channel corresponding to each TTI, where a common control channel corresponding to a set of TTIs carries a common control corresponding to a set of TTIs. The information, the control channel corresponding to each TTI carries the change information of the control information corresponding to each TTI with respect to the common control information corresponding to a group of TTIs. In this way, the first network device does not need to send all the control information corresponding to each TTI to the second network device, so that a large amount of transmission resources can be saved. As shown in FIG. 11 and FIG. 12, in the downlink transmission for FDD and TDD, respectively, the common control information of a group of TTIs includes the same part of the control information in the control information corresponding to each TTI.

In step 1003, the second network device receives a common control channel corresponding to a set of TTIs sent by the first network device, and a control channel corresponding to each TTI in a set of TTIs.

In step 1004, the control information corresponding to each TTI is determined according to the common control information corresponding to a set of TTIs and the change information corresponding to each TTI in a set of TTIs.

In an implementation, when the second network device determines the control information of a TTI in a set of TTIs, if the change information corresponding to the TTI is the incremental control of the control information corresponding to the TTI with respect to the common control information corresponding to the set of TTIs. For the information, the common control information corresponding to the TTI and the change information corresponding to the TTI may be used as the control information corresponding to the TTI; if the change information corresponding to the TTI is the control information corresponding to the TTI corresponding to a set of TTIs For the control information of the common control information update, the partial control information of the common control information corresponding to the TTI and the change information corresponding to the TTI may be used as the control information corresponding to the TTI. In this way, the control information corresponding to each TTI can be determined.

In step 1005, the second network device demodulates and decodes the data channel for each data channel corresponding to each TTI in a set of TTIs according to control information corresponding to each TTI in the set of TTIs, and determines corresponding to each TTI. The reception of the data channel.

In the embodiment of the present invention, a method for transmitting a reference signal and determining a receiving condition of a data channel corresponding to a group of TTIs according to the reference signal is further provided. As shown in FIG. 13, the corresponding processing may be as follows:

In step 1301, the first network device sends a reference signal of each TTI in a set of TTIs to the second network device.

In an implementation, the first network device schedules a set of TTIs for the second network device, and the first network device may send the reference signal of each TTI to the second network device in the corresponding TTI, where the reference signal of the first TTI may be independent. The channel estimation is performed. When performing the channel estimation, the second TTI needs to refer to all or part of the TTI reference signals before the TTI in the TTI. The reference signal of the first TTI occupies a resource equal to or greater than the reference signal of each second TTI. The size of the occupied resource and the size of the resource may be represented by the number of resource units. Therefore, the reference signal of the second TTI occupies less transmission resources, which can save transmission resources.

In step 1302, the second network device receives a reference signal of each TTI in a set of TTIs sent by the first network device.

In step 1303, the second network device performs channel estimation on the first TTI according to the reference signal of the first TTI for the first TTI.

In an implementation, when channel estimation is performed on a first TTI in a group of TTIs, channel estimation may be performed using a reference signal of the first TTI.

In step 1304, the second network device, according to any TTI in the second TTI, according to any reference signal of any TTI, and all or part of the reference signals in the reference signals of each TTI before any TTI in a set of TTIs, Any TTI performs channel estimation.

In the implementation, when performing channel estimation on any TTI in the second TTI in a set of TTIs, reference may be made to the reference signals of the TTI and all reference signals in the reference signals of the TTIs before the TTI in the set of TTIs. The TTI performs channel estimation, or may refer to the reference signal of the TTI, and part of the reference signals in the reference signals of the TTIs before the TTI in the set of TTIs, and perform channel estimation on the TTI.

In addition, the reference signal of the TTI, the reference signal of all the TTIs in the TTIs before the TTI in the set of TTIs, or the reference signal of the TTI, and the TTIs before the TTI in the set of TTIs may also be referred to. The reference signal of the partial TTI, such as a set of TTI, the reference signal of several TTIs before the TTI.

In step 1305, according to the control information corresponding to each TTI in a set of TTIs and the corresponding channel estimation result, the data channel corresponding to each TTI in a group of TTIs is demodulated and decoded, and each TTI is determined. Corresponding data channel reception.

In an implementation, the second network device may perform channel estimation on the control channel of each TTI by using a reference signal of each TTI in a set of TTIs, and perform demodulation to obtain control information corresponding to each TTI. Then, channel estimation is performed on the data channel corresponding to each TTI, and the data channel corresponding to each TTI in a group of TTIs is solved according to the obtained control information corresponding to each TTI and the result of channel estimation for each TTI. Tuning, and then decoding the demodulated data channel to determine whether the data channel corresponding to each TTI is correctly decoded, thereby obtaining the reception condition of the data channel corresponding to each TTI.

In addition, as shown in FIG. 14, the embodiment of the present invention further provides that: in a set of TTIs sent by the first network device to the second network device, the first TTI sends all reference signals, and is used in the second TTI in a group of TTIs. A part of the TTI transmits the reference signal, and another part of the TTI does not transmit the reference signal. The corresponding processing can be as follows:

In step 1401, the first network device sends a reference signal of each TTI in a set of TTIs to the second network device.

In an implementation, when the first network device sends a set of TTIs for the second network device, all the first TTIs are sent. The reference signal, each second TTI in the set of TTIs, randomly transmits a reference signal for a portion of the TTI, and another portion of the TTI does not transmit the reference signal.

In step 1402, the second network device receives the reference signal of the first TTI and the reference signal of the partial TTI in the second TTI.

In step 1403, for any TTI in a group of TTIs, if any TTI has a reference signal, channel estimation is performed according to a reference signal of any TTI, and if any TTI has no reference signal, according to any one of the TTIs The channel signal is estimated for any TTI based on the nearest TTI reference signal before TTI.

In an implementation, after receiving the TTI in the TTI, the second network device may obtain the reference signal of the TTI, and if the TTI has a reference signal, perform channel estimation according to the reference signal of any TTI, if the TTI Without the reference signal, the reference signal of the nearest TTI before the TTI can be obtained as the reference signal of the TTI, and then the channel estimation is performed on the TTI.

In addition, after receiving the TTI of the TTI, the second network device may obtain the reference signal of the TTI, and if the TTI has a reference signal, perform channel estimation on the TTI according to the reference signal of the TTI, if the TTI Without the reference signal, the reference signal of all or part of the TTI before the TTI may be acquired as a reference signal of the TTI, and then the channel estimation is performed on the TTI.

In step 1404, according to the control information corresponding to each TTI in a set of TTIs and the corresponding channel estimation result, the data channel corresponding to each TTI in a group of TTIs is demodulated and decoded, and each TTI is determined. Corresponding data channel reception.

As shown in FIG. 4, the embodiment of the present invention further provides that when the first network device is a terminal and the second network device is a base station, the process of the method is as follows:

In an implementation, when the terminal transmits data to the base station, the terminal requests uplink resources from the base station, and the base station allocates uplink transmission resources to the terminal according to the amount of data to be transmitted by the terminal, and the terminal may determine that a group of TTIs transmit data to the base station, and the group of TTIs may include The multiple TTIs may be consecutive in the time domain or may be discontinuous in the time domain. The multiple TTIs are associated with each other, for example, the control information corresponding to each TTI has the same part, and the terminal may be in the The control information corresponding to the first TTI of each group of TTIs carries an identifier indicating that the TTI is the first TTI.

The specific processing in the step 402 to the step 407 is the same as the processing in which the first network device is the base station, and the second network device is the terminal, and details are not described herein again.

Optionally, the embodiment of the present invention further provides that, when the terminal transmits data to the base station, the base station needs to send the data channel of each TTI to the terminal before the base station receives the data channel of the first TTI in the set of TTIs of the corresponding terminal sent by the terminal. The corresponding scheduling information, the way to send scheduling information can be as follows:

The scheduling information corresponding to the data channel of each TTI in the set of TTIs is sent to the first network device by using the control channel in a TTI before the first TTI or a group of TTIs.

The scheduling information includes information such as data scheduling coding information, uplink coding information, power consumption indication, and the like.

In an implementation, when transmitting data information to a base station, the terminal requests an uplink resource from the base station, and the base station allocates an uplink transmission resource according to the amount of data to be transmitted by the terminal, and passes a TTI before receiving the first TTI in the set of TTIs. Sending scheduling information corresponding to the data channel of each TTI to the terminal. As shown in FIG. 15 , a group of TTIs includes two TTIs, and the base station may send scheduling information corresponding to each TTI data channel in the group of TTIs to the terminal through a certain TTI before a group of TTIs. In this way, the downlink transmission and the downlink transmission are switched less, so that the uplink/downlink handover overhead can be saved.

Alternatively, the base station sends scheduling information corresponding to the data channel of each TTI to the terminal through the first TTI in the set of TTIs.

In the embodiment of the present invention, the second network device receives, by the first network device, a data channel corresponding to each TTI in a set of transmission time intervals TTI, where the set of TTIs includes the first TTI and the at least one second Determining, by the TTI, a first process identifier corresponding to the transport block in the first TTI, and determining, according to the first process identifier, a second process identifier of each of the at least one second TTI, according to receiving the data channel corresponding to the group of TTIs respectively In the case, the response information corresponding to each group of TTIs is generated, and the response information corresponding to each TTI in the set of TTIs is sent to the first network device. In this way, when the first network device transmits the data information of a set of TTIs to the second network device, the process identifier of the transport block of each TTI does not need to be carried, thereby saving a large amount of transmission resources.

Based on the same technical concept, an embodiment of the present invention further provides a network device. As shown in FIG. 2, the network device includes a receiver 210, a processor 220, and a transmitter 230, where:

The receiver 210 is configured to receive, by the first network device, a data channel corresponding to each TTI in a set of transmission time intervals TTI, where the set of TTIs includes a first TTI and at least one second TTI;

The processor 220 is configured to acquire a first process identifier corresponding to the transport block in the first TTI, and determine, according to the first process identifier, a second process identifier of each of the at least one second TTI;

The processor 220 is configured to generate response information corresponding to the set of TTIs respectively according to the receiving situation of the data channels respectively corresponding to the set of TTIs;

The transmitter 230 is configured to separately send response information corresponding to each TTI in the set of TTIs to the first network device.

Optionally, the processor 220 is configured to:

Obtaining time domain range information of the set of TTIs, and determining, according to the time domain range information, the first TTI and the at least one second TTI included in the set of TTIs;

The receiver 210 is configured to receive a data channel corresponding to each of the first TTI and the at least one second TTI, respectively.

Optionally, determining, according to the time domain range information, the first TTI and the at least one second TTI included in the group of TTIs, including any one of the following conditions:

When the time domain range information indicates that the number of TTIs included in the group of TTIs is N, determining that the TTIs included in the group of TTIs are after the first TTI and the first TTI Continuous N-1 second TTIs;

When the time domain range information indicates a time interval between the first TTI and the last TTI in the set of TTIs, determining that the TTI included in the set of TTIs is the first TTI and After the first TTI and All second TTIs within the time interval;

When the time domain range information indicates the effective time range of the control information corresponding to the first TTI, determining, according to the effective time range of the control information corresponding to the first TTI, determining the set of TTIs The included TTI is the first TTI and all second TTIs after the first TTI and within the effective time range of the control information;

When the time domain range information indicates an effective time range of the common control information corresponding to the set of TTIs, determining that the TTI included in the set of TTIs is the first TTI and is in the first All second TTIs after the TTI and within the effective time range of the common control information.

Optionally, the processor 220 is configured to:

Obtaining a preset first process identifier corresponding to the transport block in the first TTI; or

The receiver 210 is configured to receive, by the first network device, a control channel corresponding to the first TTI, where the processor 220 is configured to acquire a first process identifier carried in the control channel, where The first process identifier is a process identifier corresponding to the transport block in the first TTI in the set of TTIs; or

The processor 220 is configured to obtain, by using a common control channel corresponding to the set of TTIs, a first process identifier, where the first process identifier is a process identifier corresponding to a transport block in the first TTI of the set of TTIs. .

Optionally, the processor 220 is configured to:

Obtaining a preset maximum number of processes, and a TTI interval N between the first TTI and the Nth second TTI; dividing a sum of the first process identifier and the TTI interval N by the maximum process a number, the obtained remainder, is determined as a second process identifier of the Nth second TTI, where N is a positive integer; or

Obtaining a preset maximum number of processes, and a TTI interval P between the first TTI and the first second TTI; dividing a sum of the first process identifier and the TTI interval P by the maximum process Number, the obtained remainder is determined as the second process identifier of the first second TTI, where P is a positive integer;

Obtaining a second process identifier of the Nth second TTI, and a TTI interval Q of the N+1 second TTI and the Nth second TTI, and identifying a second process identifier of the Nth second TTI And the sum of the TTI interval Q, divided by the maximum number of processes, the remainder obtained is determined as the second process identifier of the (N+1)th second TTI, where N and Q are positive integers.

Optionally, the processor 220 is configured to:

Obtaining time domain range information of the preset set of TTIs; or

The receiver 210 is configured to receive the control channel corresponding to the first TTI that is sent by the first network device, where the processor 220 is configured to acquire the Time domain range information for a set of TTIs; or,

The processor 220 is configured to obtain time domain range information of the set of TTIs by using a common control channel corresponding to the set of TTIs.

Optionally, the receiver 210 is configured to receive, by the first network device, a control channel corresponding to each TTI in the set of TTIs, where the control channel corresponding to the first TTI is carried Control information corresponding to the first TTI, where each control channel corresponding to the second TTI carries change information of control information corresponding to each second TTI with respect to control information corresponding to the first TTI, The change information includes: incremental control information of control information of the second TTI with respect to control information corresponding to the first TTI, or control information corresponding to the second TTI, corresponding to the first TTI Control information for controlling information update;

The processor 220 is configured to determine, according to the control information corresponding to the first TTI and the change information corresponding to each of the second TTIs, control information corresponding to each of the second TTIs;

The processor 220 is configured to perform demodulation and decoding of a data channel on a data channel corresponding to each TTI in the set of TTIs according to control information corresponding to each TTI in the set of TTIs, and determine The reception status of the data channel corresponding to each TTI is described.

Optionally, the receiver 210 is configured to receive a common control channel corresponding to the set of TTIs sent by the first network device, and a control channel corresponding to each TTI in a set of TTIs, where the one The common control channel corresponding to the group TTI carries the common control information corresponding to the set of TTIs, and the control channel corresponding to each TTI carries the control information corresponding to each TTI with respect to the set of TTIs. Corresponding information of the common control information, the change information includes: incremental control information of the common control information of each TTI relative to the common control information corresponding to the set of TTIs, or corresponding to each TTI Control information for updating control information relative to common control information corresponding to the set of TTIs;

The processor 220 is configured to determine control information corresponding to each TTI according to common control information corresponding to the set of TTIs and change information corresponding to each TTI in the set of TTIs;

Optionally, the receiver 210 is configured to:

Receiving, by the first network device, a reference signal of each TTI in the set of TTIs, where a reference signal of the first TTI occupies a resource size greater than or equal to a reference signal of each of the second TTIs Resource size

The processor 220 is configured to perform channel estimation on the first TTI according to the reference signal of the first TTI for the first TTI;

The processor 220 is configured to, according to any TTI in the second TTI, a reference signal according to any one of the TTIs, and a reference signal of each TTI in the set of TTIs before the any TTI Channel estimation for any of the TTIs, all or part of the reference signals;

The processor 220 is configured to perform demodulation of a data channel for a data channel corresponding to each TTI in the set of TTIs according to control information corresponding to each TTI in the set of TTIs and corresponding channel estimation results. And decoding, determining the reception status of the data channel corresponding to each TTI.

Optionally, the transmitter 230 is configured to:

Transmitting response information corresponding to each TTI of the set of TTIs to the first TTI in the last TTI of the set of TTIs or one TTI other than the set of TTIs A network device.

Optionally, the transmitter 230 is further configured to send, by using a control channel, a data channel of each TTI in the set of TTIs by using a control channel in a TTI before the set of TTIs. Corresponding scheduling information.

With regard to the apparatus in the above embodiments, the specific manner in which the respective components perform the operations has been described in detail in the embodiment relating to the method, and will not be explained in detail herein.

Based on the same technical concept, an embodiment of the present invention further provides a network device. As shown in FIG. 3, the network device includes a processor 310, a transmitter 320, and a receiver 330, where:

The transmitter 320 is configured to send, to the second network device, each of a set of TTIs corresponding to the second network device. TTI data channel;

The receiver 330 is configured to receive response information corresponding to each TTI in the set of TTIs that is fed back by the second network device according to the receiving situation of the data channel;

The processor 310 is configured to perform hybrid automatic repeat request HARQ processing according to the received response information.

Optionally, the set of TTIs includes a first TTI and at least one second TTI;

a process identifier corresponding to the transport block of the first TTI, where the control channel corresponding to the first TTI does not carry a process identifier of the transport block in the control channel corresponding to the second TTI; or, the group The process identifier of the transport block of the first TTI is carried in the common control channel corresponding to the TTI, and the process identifier of the transport block is not carried in the control channel corresponding to each TTI in the set of TTIs.

Optionally, the processor 310 is further configured to determine time domain range information of the set of TTIs;

The transmitter 320 is further configured to send, to the second network device, a control channel of each TTI in the set of TTIs, where a control channel corresponding to the first TTI carries a time domain of the set of TTIs Range information; or,

The transmitter 320 is further configured to send, to the second network device, a common control channel corresponding to the set of TTIs, where the common control channel carries time domain range information of the set of TTIs.

Optionally, the time domain range information of the set of TTIs is: a number of TTIs in the set of TTIs, or a time interval of a first TTI and a last TTI in the set of TTIs, or the set of The effective time range of the control information corresponding to the first TTI in the TTI or the effective time range of the common control information corresponding to the set of TTIs.

Optionally, the set of TTIs includes a first TTI and at least one second TTI, and the processor 310 is further configured to:

The change information of the control information corresponding to each of the second TTIs and the control information corresponding to the first TTI is determined, where the change information includes: control information corresponding to the second TTI, The incremental control information of the control information corresponding to the TTI, or the control information updated by the control information corresponding to the second TTI with respect to the control information corresponding to the first TTI;

The transmitter 320 is further configured to send, to the second network device, a control channel corresponding to each TTI in the set of TTIs, where the control channel corresponding to the first TTI carries the first TTI Control information, each of the control channels corresponding to the second TTI carrying change information corresponding to each of the second TTIs.

Optionally, the processor 310 is further configured to:

Determining, by the common control information of each TTI, the change information of the control information corresponding to each TTI in the set of TTIs, the common control information of each of the TTIs The incremental control information of the common control information corresponding to the group TTI, or the control information updated by the control information corresponding to each TTI with respect to the common control information corresponding to the set of TTIs;

The transmitter 320 is further configured to send, to the second network device, a common control channel corresponding to the set of TTIs, and a control channel corresponding to each TTI in a set of TTIs, and the common control corresponding to the set of TTIs The channel carries the common control information corresponding to the set of TTIs, where the control channel corresponding to each TTI carries the control information corresponding to each TTI with respect to the common control information corresponding to the set of TTIs. Change information.

Optionally, the set of TTIs includes a first TTI and at least one second TTI, and the transmitter 320 is further configured to:

And transmitting, by the second network device, a reference signal of each TTI in the set of TTIs, where a reference signal of the first TTI occupies a resource size greater than or equal to a resource occupied by a reference signal of each of the second TTIs size.

Based on the same technical concept, an embodiment of the present invention further provides a network device, as shown in FIG.

The receiving module 1610 is configured to receive, by the first network device, a data channel corresponding to each TTI in a set of transmission time intervals TTI, where the set of TTIs includes a first TTI and at least one second TTI;

The obtaining module 1620 is configured to acquire a first process identifier corresponding to the transport block in the first TTI;

a determining module 1630, configured to determine, according to the first process identifier, a second process identifier of each of the at least one second TTI;

The generating module 1640 is configured to generate response information corresponding to the set of TTIs respectively according to the receiving situation of the data channels respectively corresponding to the set of TTIs;

The sending module 1650 is configured to separately send response information corresponding to each TTI in the set of TTIs to the first network device.

Optionally, as shown in FIG. 17, the receiving module 1610 includes a determining submodule 1611 and a receiving submodule 1612, where:

The determining sub-module 1621 is configured to acquire time domain range information of the set of TTIs, and determine, according to the time domain range information, the first TTI included in the set of TTIs and the at least one Second TTI;

The receiving sub-module 1622 is configured to receive a data channel corresponding to each of the first TTI and the at least one second TTI, respectively.

Optionally, the determining submodule 1621 is configured to:

When the time domain range information indicates a time interval between the first TTI and the last TTI in the set of TTIs, determining that the TTI included in the set of TTIs is the first TTI and All second TTIs after the first TTI and within the time interval;

When the time domain range information indicates the effective time range of the control information corresponding to the first TTI, determining, according to the effective time range of the control information corresponding to the first TTI, determining that the set of TTIs is included The TTI is the first TTI and all second TTIs after the first TTI and within the effective time range of the control information;

In the case that the time domain range information indicates the effective time range of the common control information corresponding to the set of TTIs, determining the set of TTIs according to the effective time range of the common control information corresponding to the set of TTIs. The included TTI is the first TTI and all second TTIs after the first TTI and within the effective time range of the common control information.

Optionally, the obtaining module 1620 is configured to:

The receiving module 1610 is configured to receive a control channel corresponding to the first TTI that is sent by the first network device, where the acquiring module 1620 is configured to acquire a first process identifier that is carried in the control channel, where The first process identifier is a process identifier corresponding to the transport block in the first TTI in the set of TTIs; or

The obtaining module 1620 is configured to obtain, by using a common control channel corresponding to the set of TTIs, a first process identifier, where the first process identifier is a process identifier corresponding to a transport block in the first TTI of the set of TTIs. .

Optionally, the obtaining module 1620 is configured to obtain a preset maximum number of processes, and a TTI interval N between the first TTI and the Nth second TTI, where the determining module 1630 is configured to a sum of the first process identifier and the TTI interval N, divided by the maximum number of processes, and the obtained remainder is determined as a second process identifier of the Nth second TTI, where N is a positive integer; or ,

The obtaining module 1620 is configured to obtain a preset maximum number of processes, and a TTI interval P between the first TTI and the first second TTI, where the determining module 1630 is configured to use the first process. The sum of the identifier and the TTI interval P, divided by the maximum number of processes, the remainder obtained is determined as the second process identifier of the first second TTI, where P is a positive integer;

The obtaining module 1620 is configured to acquire a second process identifier of the Nth second TTI, and a TTI interval Q of the N+1 second TTI and the Nth second TTI, where the determining module 1630 is configured. And a sum of the second process identifier of the Nth second TTI and the TTI interval Q, divided by the maximum number of processes, and obtained as a remainder of the N+1th second TTI The second process identifier, where N and Q are positive integers.

Optionally, the obtaining module 1620 is configured to:

Obtaining time domain range information of the preset set of TTIs; or

The receiving module 1610 is configured to:

Receiving, by the first network device, the control channel corresponding to the first TTI, where the acquiring module 1620 is configured to acquire time domain range information of the group of TTIs carried in the control channel corresponding to the first TTI ;or,

The obtaining module 1620 is configured to obtain time domain range information of the set of TTIs by using a common control channel corresponding to the set of TTIs.

Optionally, the receiving module 1610 is further configured to receive, by the first network device, a control channel corresponding to each TTI in the set of TTIs, where the control channel corresponding to the first TTI carries Control information corresponding to the first TTI, where the control information corresponding to each of the second TTIs carries change information of control information corresponding to each second TTI with respect to control information corresponding to the first TTI The change information includes: incremental control information of the control information of the second TTI with respect to the control information corresponding to the first TTI, or control information corresponding to the second TTI corresponding to the first TTI Control information for updating control information;

The determining module 1630 is further configured to determine, according to the control information corresponding to the first TTI and the change information corresponding to each of the second TTIs, control information corresponding to each of the second TTIs;

The determining module 1630 is further configured to: perform demodulation and decoding of the data channel on the data channel corresponding to each TTI in the set of TTIs according to control information corresponding to each TTI in the set of TTIs, and determine The reception status of the data channel corresponding to each TTI.

Optionally, the receiving module 1610 is further configured to receive a common control channel corresponding to the set of TTIs sent by the first network device, and a control channel corresponding to each TTI in a set of TTIs, where A common control channel corresponding to a set of TTIs carries common control information corresponding to the set of TTIs, and a control channel corresponding to each TTI The change information of the control information corresponding to each TTI is compared with the common control information corresponding to the set of TTIs, where the change information includes: the common control information of each TTI is relative to the group Incremental control information of the common control information corresponding to the TTI, or control information updated by the control information corresponding to each TTI with respect to the common control information corresponding to the set of TTIs;

The determining module 1630 is further configured to determine control information corresponding to each TTI according to common control information corresponding to the set of TTIs and change information corresponding to each TTI in the set of TTIs;

Optionally, the receiving module 1610 is further configured to receive a reference signal of each TTI in the set of TTIs sent by the first network device, where a reference signal of the first TTI occupies a larger resource size. Equal to the resource size occupied by the reference signal of each of the second TTIs;

As shown in FIG. 18, the network device further includes:

The estimating module 1660 is configured to perform channel estimation on the first TTI according to the reference signal of the first TTI for the first TTI;

The estimating module 1660 is configured to, according to any TTI in the second TTI, a reference signal according to any one of the TTIs, and a reference signal of each TTI in the set of TTIs before the any TTI Channel estimation for any of the TTIs, all or part of the reference signals;

The determining module 1630 is further configured to perform, according to the control information corresponding to each TTI in the set of TTIs and the corresponding channel estimation result, a data channel solution for a data channel corresponding to each TTI in the set of TTIs. The decoding is performed to determine the reception status of the data channel corresponding to each TTI.

Optionally, the sending module 1650 is configured to: respectively, in the last TTI of the set of TTIs or within one TTI of the set of TTIs, each of the set of TTIs by using a control channel The response information corresponding to the TTIs is sent to the first network device.

Optionally, the sending module 1650 is further configured to send the set of TTIs to the first network device by using a control channel in the first TTI or in a TTI before the set of TTIs. Scheduling information corresponding to the data channel of each TTI.

With regard to the apparatus in the above embodiments, the specific manner in which the respective modules perform the operations has been described in detail in the embodiment relating to the method, and will not be explained in detail herein.

Based on the same technical concept, the embodiment of the present invention further provides a network device. As shown in FIG. 19, the network device includes:

The sending module 1910 is configured to send, to the second network device, a data channel corresponding to each TTI of the set of TTIs of the second network device;

The receiving module 1920 is configured to receive, by the second network device, response information corresponding to each TTI in the set of TTIs that are fed back according to the receiving situation of the data channel;

The processing module 1930 is configured to perform hybrid automatic repeat request HARQ processing according to the received response information.

Optionally, the set of TTIs includes a first TTI and at least one second TTI;

a process identifier of the transport block of the first TTI carried in the control channel corresponding to the first TTI, each of the The process identifier of the transport block that does not carry the transport block in the control channel corresponding to the second TTI; or the process identifier of the transport block of the first TTI that is carried in the common control channel corresponding to the set of TTIs, each of the set of TTIs The process identifier of the transport block is not carried in the control channel corresponding to the TTI.

Optionally, as shown in FIG. 20, the network device further includes:

a determining module 1940, configured to determine time domain range information of the set of TTIs;

The sending module 1910 is further configured to send, to the second network device, a control channel of each TTI in the set of TTIs, where the control channel corresponding to the first TTI carries a time domain of the set of TTIs Range information; or,

The sending module 1910 is further configured to send, to the second network device, a common control channel corresponding to the set of TTIs, where the common control channel carries time domain range information of the set of TTIs.

Optionally, the group of TTIs includes a first TTI and at least one second TTI, and the determining module 1940 is further configured to respectively determine that control information corresponding to each of the second TTIs is corresponding to the first TTI. Change information of the control information, wherein the change information includes: incremental control information of control information corresponding to the second TTI with respect to control information corresponding to the first TTI, or control corresponding to the second TTI Control information updated with respect to control information corresponding to the first TTI;

The sending module 1910 is further configured to send, to the second network device, a control channel corresponding to each TTI in the set of TTIs, where the control channel corresponding to the first TTI carries the first TTI Control information, each of the control channels corresponding to the second TTI carrying change information corresponding to each of the second TTIs.

Optionally, the determining module 1940 is further configured to determine, according to the change information of the control information corresponding to each TTI in the set of TTIs, the common control information corresponding to the set of TTIs, where the change information includes: The incremental control information of the common control information of each TTI with respect to the common control information corresponding to the set of TTIs, or the control information corresponding to each TTI is updated with respect to the common control information corresponding to the set of TTIs. Control information

The sending module 1910 is further configured to send, to the second network device, a common control channel corresponding to the set of TTIs, and a control channel corresponding to each TTI in a set of TTIs, and the common control corresponding to the set of TTIs The channel carries the common control information corresponding to the set of TTIs, where the control channel corresponding to each TTI carries the control information corresponding to each TTI with respect to the common control information corresponding to the set of TTIs. Change information.

Optionally, the set of TTIs includes a first TTI and at least one second TTI, and the sending module 1910 is further configured to:

In the embodiment of the present invention, the second network device receives, by the first network device, a data channel corresponding to each TTI in a set of transmission time intervals TTI, where the set of TTIs includes the first TTI and the at least one second Determining, by the TTI, a first process identifier corresponding to the transport block in the first TTI, and determining, according to the first process identifier, a second process identifier of each of the at least one second TTI, according to receiving the data channel corresponding to the group of TTIs respectively In the case, the response information corresponding to a set of TTIs is generated, and the response information corresponding to each TTI in the set of TTIs is sent to the first network. device. In this way, when the first network device transmits the data information of a set of TTIs to the second network device, the process identifier of the transport block of each TTI does not need to be carried, thereby saving a large amount of transmission resources.

Based on the same technical concept, the embodiment of the present invention further provides a system for data transmission, where the system includes a first network device and a second network device, where:

The first network device is configured to send, to the second network device, a data channel corresponding to each TTI of a set of TTIs of the second network device; and receive, according to the data channel, the second network device The response information corresponding to each TTI in the set of TTIs fed back; the hybrid automatic repeat request HARQ process is performed according to the received response information;

The second network device is configured to receive, by the first network device, a data channel corresponding to each TTI in a set of transmission time intervals TTI, where the set of TTIs includes a first TTI and at least a second TTI; obtaining a first process identifier corresponding to the transport block in the first TTI, and determining, according to the first process identifier, a second process identifier of each of the at least one second TTI; The response information of the data channel corresponding to the set of TTIs is respectively generated, and the response information corresponding to the set of TTIs is generated, and the response information corresponding to each TTI of the set of TTIs is sent to the first network device.

A person skilled in the art can understand that all or part of the steps of implementing the above embodiments may be completed by hardware, or may be executed by a program to instruct related hardware, and the program may be stored in a computer readable storage medium. The storage medium may be a read only memory, a magnetic disk or an optical disk or the like.

Claims

A method for data transmission, comprising:

Receiving, by the first network device, a data channel corresponding to each TTI in a set of transmission time intervals TTI, wherein the set of TTIs includes a first TTI and at least one second TTI;

Obtaining a first process identifier corresponding to the transport block in the first TTI, and determining, according to the first process identifier, a second process identifier of each of the at least one second TTI;

And generating response information corresponding to the set of TTIs respectively according to the receiving situation of the data channels respectively corresponding to the set of TTIs;

Sending response information corresponding to each TTI in the set of TTIs to the first network device.
The method according to claim 1, wherein the receiving, by the first network device, the data channel corresponding to each TTI in the set of transmission time intervals TTI comprises:

Obtaining time domain range information of the set of TTIs, and determining, according to the time domain range information, the first TTI and the at least one second TTI included in the set of TTIs;

Receiving respective data channels corresponding to the first TTI and the at least one second TTI, respectively.
The method according to claim 2, wherein the first TTI and the at least one second TTI included in the set of TTIs are determined according to the time domain range information, including the following Any one:

When the time domain range information indicates that the number of TTIs included in the group of TTIs is N, determining that the TTIs included in the group of TTIs are after the first TTI and the first TTI Continuous N-1 second TTIs;

When the time domain range information indicates a time interval between the first TTI and the last TTI in the set of TTIs, determining that the TTI included in the set of TTIs is the first TTI and All second TTIs after the first TTI and within the time interval;

When the time domain range information indicates the effective time range of the control information corresponding to the first TTI, determining, according to the effective time range of the control information corresponding to the first TTI, determining that the set of TTIs is included The TTI is the first TTI and all second TTIs after the first TTI and within the effective time range of the control information;

In the case that the time domain range information indicates the effective time range of the common control information corresponding to the set of TTIs, determining the set of TTIs according to the effective time range of the common control information corresponding to the set of TTIs. The included TTI is the first TTI and all second TTIs after the first TTI and within the effective time range of the common control information.
The method according to any one of claims 1 to 3, wherein the acquiring the first process identifier corresponding to the transport block in the first TTI comprises:

Obtaining a preset first process identifier corresponding to the transport block in the first TTI; or

Receiving, by the first network device, a control channel corresponding to the first TTI, and acquiring a first process identifier that is carried in the control channel, where the first process identifier is in a first TTI of the group of TTIs The process ID corresponding to the transport block; or,

The first process identifier is obtained by using the common control channel corresponding to the set of TTIs, where the first process identifier is a process identifier corresponding to the transport block in the first TTI of the set of TTIs.
The method according to claim 1, wherein the determining, according to the first process identifier, the second process identifier of each of the at least one second TTI comprises:

Obtaining a preset maximum number of processes, and a TTI interval N between the first TTI and the Nth second TTI; dividing a sum of the first process identifier and the TTI interval N by the maximum process a number, the obtained remainder, is determined as a second process identifier of the Nth second TTI, where N is a positive integer; or

Obtaining a preset maximum number of processes, and a TTI interval P between the first TTI and the first second TTI; dividing a sum of the first process identifier and the TTI interval P by the maximum process Number, the obtained remainder is determined as the second process identifier of the first second TTI, where P is a positive integer;

Obtaining a second process identifier of the Nth second TTI, and a TTI interval Q of the N+1 second TTI and the Nth second TTI, and identifying a second process identifier of the Nth second TTI And the sum of the TTI interval Q, divided by the maximum number of processes, the remainder obtained is determined as the second process identifier of the (N+1)th second TTI, where N and Q are positive integers.
The method according to claim 2, wherein the acquiring the time domain range information of the set of TTIs comprises:

Obtaining time domain range information of the preset set of TTIs; or

Receiving, by the first network device, the control channel corresponding to the first TTI, acquiring time domain range information of the group of TTIs carried in the control channel corresponding to the first TTI; or

The time domain range information of the set of TTIs is obtained by using a common control channel corresponding to the set of TTIs.
The method according to any one of claims 1 to 6, wherein the generating, before the generating the response information corresponding to the set of TTIs according to the receiving conditions of the data channels corresponding to the set of TTIs, comprises:

And receiving, by the first network device, a control channel corresponding to each TTI in the set of TTIs, where the control channel corresponding to the first TTI carries control information corresponding to the first TTI, where each The control information corresponding to the second TTI carries the change information of the control information corresponding to each of the second TTIs and the control information corresponding to the first TTI, where the change information includes: the second TTI The incremental control information of the control information relative to the control information corresponding to the first TTI, or the control information updated by the control information corresponding to the second TTI with respect to the control information corresponding to the first TTI;

Determining, according to the control information corresponding to the first TTI and the change information corresponding to each of the second TTIs, control information corresponding to each of the second TTIs;

Demodulating and decoding a data channel for each data channel corresponding to each TTI in the set of TTIs according to control information corresponding to each TTI in the set of TTIs, and determining a data channel corresponding to each TTI Receiving situation.
The method according to any one of claims 1 to 6, wherein the generating, before the generating the response information corresponding to the set of TTIs according to the receiving conditions of the data channels corresponding to the set of TTIs, comprises:

And receiving, by the first network device, a common control channel corresponding to the set of TTIs, and a control channel corresponding to each TTI in the set of TTIs, where the common control channel corresponding to the set of TTIs carries the a common control information corresponding to a set of TTIs, where the control channels corresponding to each TTI respectively carry change information of control information corresponding to each TTI with respect to common control information corresponding to the set of TTIs, the change The information includes: incremental control information of the common control information of each TTI relative to the common control information corresponding to the set of TTIs, or common information corresponding to the control information of each TTI with respect to the set of TTIs Control information for controlling information update;

Determining control information corresponding to each TTI according to the common control information corresponding to the set of TTIs and the change information corresponding to each TTI in the set of TTIs;

Data corresponding to each TTI in the set of TTIs according to control information corresponding to each TTI in the set of TTIs The channel performs demodulation and decoding of the data channel to determine the reception status of the data channel corresponding to each TTI.
The method according to any one of claims 1 to 6, wherein the generating, before the generating the response information corresponding to the set of TTIs according to the receiving conditions of the data channels corresponding to the set of TTIs, comprises:

Receiving, by the first network device, a reference signal of each TTI in the set of TTIs, where a reference signal of the first TTI occupies a resource size greater than or equal to a reference signal of each of the second TTIs Resource size

For the first TTI, performing channel estimation on the first TTI according to the reference signal of the first TTI;

For any TTI in the second TTI, according to the reference signal of any one of the TTIs, and all or part of the reference signals in the reference signals of the TTIs before the any TTI in the set of TTIs, Performing channel estimation on any of the TTIs;

Demodulating and decoding a data channel for each data channel corresponding to each TTI in the set of TTIs according to control information corresponding to each TTI in the set of TTIs and corresponding channel estimation results, determining the each The reception status of the data channel corresponding to the TTI.
The method according to any one of claims 1 to 9, wherein the sending the response information corresponding to each of the TTIs to the first network device, respectively, includes:

Transmitting response information corresponding to each TTI of the set of TTIs to the first TTI in the last TTI of the set of TTIs or one TTI other than the set of TTIs A network device.
The method according to any one of claims 1 to 10, wherein the method further comprises:

Dispatching information corresponding to a data channel of each TTI of the set of TTIs is sent to the first network device by using a control channel in a TTI or a TTI before the set of TTIs.
A data transmission method, comprising:

Transmitting, to the second network device, a data channel corresponding to each TTI of the set of TTIs of the second network device;

Receiving, by the second network device, response information corresponding to each TTI of the set of TTIs that are fed back according to the receiving situation of the data channel;

The hybrid automatic repeat request HARQ process is performed based on the received response information.
The method according to claim 12, wherein the set of TTIs comprises a first TTI and at least one second TTI;

a process identifier corresponding to the transport block of the first TTI, where the control channel corresponding to the first TTI does not carry a process identifier of the transport block in the control channel corresponding to the second TTI; or, the group The process identifier of the transport block of the first TTI is carried in the common control channel corresponding to the TTI, and the process identifier of the transport block is not carried in the control channel corresponding to each TTI in the set of TTIs.
The method of claim 12, wherein the method further comprises:

Determining time domain range information of the set of TTIs;

Transmitting, to the second network device, a control channel of each TTI in the set of TTIs, where the control channel corresponding to the first TTI carries time domain range information of the set of TTIs; or

Sending, to the second network device, a common control channel corresponding to the set of TTIs, where the common control channel carries time domain range information of the set of TTIs.
The method according to claim 14, wherein the time domain range information of the set of TTIs is: the number of TTIs in the set of TTIs, or the first TTI and the last TTI of the set of TTIs Interval, or The effective time range of the control information corresponding to the first TTI in a set of TTIs or the effective time range of the common control information corresponding to the set of TTIs.
The method according to any one of claims 12 to 15, wherein the set of TTIs comprises a first TTI and at least one second TTI, the method further comprising:

The change information of the control information corresponding to each of the second TTIs and the control information corresponding to the first TTI is determined, where the change information includes: control information corresponding to the second TTI, The incremental control information of the control information corresponding to the TTI, or the control information updated by the control information corresponding to the second TTI with respect to the control information corresponding to the first TTI;

Transmitting, by the second network device, a control channel corresponding to each TTI in the set of TTIs, where the control channel corresponding to the first TTI carries control information corresponding to the first TTI, and each of the second Each of the control channels corresponding to the TTI carries change information corresponding to each of the second TTIs.
The method according to any one of claims 12 to 15, wherein the method further comprises:

Determining, by the common control information of each TTI, the change information of the control information corresponding to each TTI in the set of TTIs, the common control information of each of the TTIs The incremental control information of the common control information corresponding to the group TTI, or the control information updated by the control information corresponding to each TTI with respect to the common control information corresponding to the set of TTIs;

Transmitting, to the second network device, a common control channel corresponding to the set of TTIs, and a control channel corresponding to each TTI in the set of TTIs, where the set of TTIs is carried in a common control channel corresponding to the set of TTIs Corresponding common control information, where the control channel corresponding to each TTI carries change information of the control information corresponding to each TTI with respect to the common control information corresponding to the set of TTIs.
The method according to any one of claims 12 to 15, wherein the set of TTIs comprises a first TTI and at least one second TTI, the method further comprising:

And transmitting, by the second network device, a reference signal of each TTI in the set of TTIs, where a reference signal of the first TTI occupies a resource size greater than or equal to a resource occupied by a reference signal of each of the second TTIs size.
A network device, characterized in that the network device comprises a receiver, a processor and a transmitter, wherein:

The receiver is configured to receive, by the first network device, a data channel corresponding to each TTI in a set of transmission time intervals TTI, where the set of TTIs includes a first TTI and at least one second TTI ;

The processor is configured to acquire a first process identifier corresponding to the transport block in the first TTI, and determine a second process identifier of each of the at least one second TTI according to the first process identifier;

The processor is configured to generate response information corresponding to the set of TTIs respectively according to the receiving situation of the data channels respectively corresponding to the set of TTIs;

The transmitter is configured to separately send response information corresponding to each TTI in the set of TTIs to the first network device.
The network device according to claim 19, wherein the processor is configured to:

Obtaining time domain range information of the set of TTIs, and determining, according to the time domain range information, the first TTI and the at least one second TTI included in the set of TTIs;

The receiver is configured to receive a data channel corresponding to each of the first TTI and the at least one second TTI, respectively.
The network device according to claim 20, wherein the first TTI and the at least one second TTI included in the set of TTIs are determined according to the time domain range information, including the following cases Any of the following:

When the time domain range information indicates that the number of TTIs included in the group of TTIs is N, determining that the TTIs included in the group of TTIs are after the first TTI and the first TTI Continuous N-1 second TTIs;

When the time domain range information indicates a time interval between the first TTI and the last TTI in the set of TTIs, determining that the TTI included in the set of TTIs is the first TTI and All second TTIs after the first TTI and within the time interval;

When the time domain range information indicates the effective time range of the control information corresponding to the first TTI, determining, according to the effective time range of the control information corresponding to the first TTI, determining the set of TTIs The included TTI is the first TTI and all second TTIs after the first TTI and within the effective time range of the control information;

When the time domain range information indicates an effective time range of the common control information corresponding to the set of TTIs, determining that the TTI included in the set of TTIs is the first TTI and is in the first All second TTIs after the TTI and within the effective time range of the common control information.
The network device according to any one of claims 19 to 21, wherein the processor is configured to:

Obtaining a preset first process identifier corresponding to the transport block in the first TTI; or

The receiver is configured to receive a control channel corresponding to the first TTI that is sent by the first network device, where the processor is configured to acquire a first process identifier that is carried in the control channel, where the first The process identifier is a process identifier corresponding to the transport block in the first TTI in the set of TTIs; or

The processor is configured to obtain a first process identifier by using a common control channel corresponding to the set of TTIs, where the first process identifier is a process identifier corresponding to a transport block in the first TTI of the set of TTIs.
The network device according to claim 19, wherein the processor is configured to:

Obtaining a preset maximum number of processes, and a TTI interval N between the first TTI and the Nth second TTI; dividing a sum of the first process identifier and the TTI interval N by the maximum process a number, the obtained remainder, is determined as a second process identifier of the Nth second TTI, where N is a positive integer; or

Obtaining a preset maximum number of processes, and a TTI interval P between the first TTI and the first second TTI; dividing a sum of the first process identifier and the TTI interval P by the maximum process Number, the obtained remainder is determined as the second process identifier of the first second TTI, where P is a positive integer;

Obtaining a second process identifier of the Nth second TTI, and a TTI interval Q of the N+1 second TTI and the Nth second TTI, and identifying a second process identifier of the Nth second TTI And the sum of the TTI interval Q, divided by the maximum number of processes, the remainder obtained is determined as the second process identifier of the (N+1)th second TTI, where N and Q are positive integers.
The network device according to claim 20, wherein the processor is configured to:

Obtaining time domain range information of the preset set of TTIs; or

The receiver is configured to receive, by the first network device, a control channel corresponding to the first TTI, where the processor is configured to acquire the group that is carried in a control channel corresponding to the first TTI Time domain range information of TTI; or,

The processor is configured to acquire time domain range information of the set of TTIs by using a common control channel corresponding to the set of TTIs.
The network device according to any one of claims 19 to 24, wherein the receiver is configured to receive a control channel corresponding to each TTI of the set of TTIs sent by the first network device, where Corresponding to the first TTI Control information corresponding to the first TTI is carried in the control channel, and each control channel corresponding to the second TTI carries control information corresponding to each second TTI corresponding to the first TTI. The change information of the control information, the change information includes: incremental control information of the control information of the second TTI with respect to the control information corresponding to the first TTI, or control information corresponding to the second TTI Control information for updating control information corresponding to the first TTI;

The processor is configured to determine, according to the control information corresponding to the first TTI and the change information corresponding to each of the second TTIs, control information corresponding to each of the second TTIs;

The processor is configured to perform demodulation and decoding of a data channel on a data channel corresponding to each TTI in the set of TTIs according to control information corresponding to each TTI in the set of TTIs, and determine the The reception of the data channel corresponding to each TTI.
The network device according to any one of claims 19 to 24, wherein the receiver is configured to receive a common control channel corresponding to the set of TTIs sent by the first network device, and each of a set of TTIs a control channel corresponding to the TTI, where the common control channel corresponding to the set of TTIs carries the common control information corresponding to the set of TTIs, where each TTI is carried in the control channel corresponding to each TTI Corresponding control information, with respect to the change information of the common control information corresponding to the set of TTIs, the change information includes: an increment of the common control information of each TTI relative to the common control information corresponding to the set of TTIs Control information, or control information updated by the control information corresponding to each TTI with respect to the common control information corresponding to the set of TTIs;

The processor is configured to determine control information corresponding to each TTI according to common control information corresponding to the set of TTIs and change information corresponding to each TTI in the set of TTIs;

The processor is configured to perform demodulation and decoding of a data channel on a data channel corresponding to each TTI in the set of TTIs according to control information corresponding to each TTI in the set of TTIs, and determine the The reception of the data channel corresponding to each TTI.
The network device according to any one of claims 19 to 24, wherein the receiver is configured to:

Receiving, by the first network device, a reference signal of each TTI in the set of TTIs, where a reference signal of the first TTI occupies a resource size greater than or equal to a reference signal of each of the second TTIs Resource size

The processor is configured to perform channel estimation on the first TTI according to the reference signal of the first TTI for the first TTI;

The processor is configured to: according to any one of the TTIs, according to the reference signal of any one of the TTIs, and the reference signals of the TTIs before the TTI in the set of TTIs Channel estimation of any one of the TTIs, all or part of the reference signal;

The processor is configured to perform demodulation of a data channel on a data channel corresponding to each TTI in the set of TTIs according to control information corresponding to each TTI in the set of TTIs and corresponding channel estimation results. Decoding, determining the reception status of the data channel corresponding to each TTI.
The network device according to any one of claims 19 to 27, wherein the transmitter is configured to:

Transmitting response information corresponding to each TTI of the set of TTIs to the first TTI in the last TTI of the set of TTIs or one TTI other than the set of TTIs A network device.
The network device according to any one of claims 19 to 28, wherein the transmitter is further configured to: send, to the first network device, a control channel through a control channel in a TTI before the group of TTIs Scheduling information corresponding to a data channel of each TTI in a set of TTIs.
A network device, characterized in that the network device comprises a transmitter, a receiver and a processor, wherein:

The transmitter is configured to send, to the second network device, a data channel corresponding to each TTI of the set of TTIs of the second network device;

The receiver is configured to receive response information corresponding to each TTI in the set of TTIs that is fed back by the second network device according to the receiving situation of the data channel;

The processor is configured to perform hybrid automatic repeat request HARQ processing according to the received response information.
The network device according to claim 30, wherein the set of TTIs comprises a first TTI and at least one second TTI;

a process identifier corresponding to the transport block of the first TTI, where the control channel corresponding to the first TTI does not carry a process identifier of the transport block in the control channel corresponding to the second TTI; or, the group The process identifier of the transport block of the first TTI is carried in the common control channel corresponding to the TTI, and the process identifier of the transport block is not carried in the control channel corresponding to each TTI in the set of TTIs.
The network device according to claim 30, wherein the processor is further configured to determine time domain range information of the set of TTIs;

The transmitter is further configured to send, to the second network device, a control channel of each TTI in the set of TTIs, where a control channel corresponding to the first TTI carries a time domain range of the set of TTIs Information; or,

The transmitter is further configured to send, to the second network device, a common control channel corresponding to the set of TTIs, where the common control channel carries time domain range information of the set of TTIs.
The network device according to claim 32, wherein the time domain range information of the set of TTIs is: the number of TTIs in the set of TTIs, or the first one of the set of TTIs and the last one The time interval of the TTI, or the effective time range of the control information corresponding to the first TTI in the set of TTIs, or the effective time range of the common control information corresponding to the set of TTIs.
The network device according to any one of claims 30 to 33, wherein the set of TTIs comprises a first TTI and at least one second TTI, and the processor is further configured to:

The change information of the control information corresponding to each of the second TTIs and the control information corresponding to the first TTI is determined, where the change information includes: control information corresponding to the second TTI, The incremental control information of the control information corresponding to the TTI, or the control information updated by the control information corresponding to the second TTI with respect to the control information corresponding to the first TTI;

The transmitter is further configured to send, to the second network device, a control channel corresponding to each TTI in the set of TTIs, where the control channel corresponding to the first TTI carries the control corresponding to the first TTI And information, each of the control channels corresponding to the second TTI carries change information corresponding to each of the second TTIs.
The network device according to any one of claims 30 to 33, wherein the processor is further configured to:

Determining, by the common control information of each TTI, the change information of the control information corresponding to each TTI in the set of TTIs, the common control information of each of the TTIs The incremental control information of the common control information corresponding to the group TTI, or the control information updated by the control information corresponding to each TTI with respect to the common control information corresponding to the set of TTIs;

The transmitter is further configured to send, to the second network device, a common control channel corresponding to the set of TTIs, and a control channel corresponding to each TTI in a set of TTIs, and a common control channel corresponding to the set of TTIs Carrying the group The common control information corresponding to the TTI, where the control channel corresponding to each TTI carries change information of the control information corresponding to each TTI with respect to the common control information corresponding to the set of TTIs.
The network device according to any one of claims 30 to 33, wherein the set of TTIs comprises a first TTI and at least one second TTI, and the transmitter is further configured to:

And transmitting, by the second network device, a reference signal of each TTI in the set of TTIs, where a reference signal of the first TTI occupies a resource size greater than or equal to a resource occupied by a reference signal of each of the second TTIs size.
A system for data transmission, characterized in that the system comprises a first network device and a second network device, wherein:

The first network device is configured to send, to the second network device, a data channel corresponding to each TTI of a set of TTIs of the second network device; and receive, according to the data channel, the second network device The response information corresponding to each TTI in the set of TTIs fed back; the hybrid automatic repeat request HARQ process is performed according to the received response information;

The second network device is configured to receive, by the first network device, a data channel corresponding to each TTI in a set of transmission time intervals TTI, where the set of TTIs includes a first TTI and at least a second TTI; obtaining a first process identifier corresponding to the transport block in the first TTI, and determining, according to the first process identifier, a second process identifier of each of the at least one second TTI; The response information of the data channel corresponding to the set of TTIs is respectively generated, and the response information corresponding to the set of TTIs is generated, and the response information corresponding to each TTI of the set of TTIs is sent to the first network device.