CN115514451A - Method and device for data transmission - Google Patents

Abstract

The present application provides a data transmission method and device, which can reduce the number of blind DCI or SCI detections of a terminal device (first device) during SPS transmission, thereby reducing power consumption of the terminal device. The method includes: the first device sends the first channel quality information to the second device at the first time; the first device receives the first data sent by the second device at the second time; The channel quality information has a first modulation scheme and/or a first coding scheme with a mapping relationship, and the first data is decoded, wherein the second time is later than the first time.

Description

Method and device for data transmission

This application claims the priority of the patent application submitted to the China Patent Office on June 22, 2021, with the application number 202110689788.1 and the title of the invention "A Transmission Method for SPS", the entire contents of which are incorporated in this application by reference.

technical field

The present application relates to the communication field, and more specifically, to a data transmission method and device.

Background technique

Under the new vision of 5G, the real-time broadband communication (RTBC) scenario aims to support large bandwidth and low interaction delay. The goal is to increase the bandwidth by 10 times under the given delay and reliability requirements, creating An immersive experience when interacting with the virtual world. Among them, the extended reality (XR) service with ultra-high bandwidth and ultra-low latency requirements will face more severe challenges for the current fifth generation (5th generation, 5G) system.

In the current 5G new radio (new radio, NR) scenario, two scheduling methods are provided during the downlink transmission process, namely dynamic scheduling and semi-persistent scheduling (SPS) with configuration authorization. In dynamic scheduling, the user equipment (user equipment, UE) will always monitor the physical downlink shared channel (physical downlink control channel, PDCCH), and through the cell-radionetwork temporary identity (C-RNTI) carried by the PDCCH information to determine whether it is a scheduling signaling for the terminal. In configuring the authorized SPS, the base station configures the downlink SPS resource cycle through the radio resource control (RRC) layer, activates the SPS transmission through the PDCCH and indicates the configuration parameters used for the first transmission of the SPS, such as: time-frequency domain resources, Modulation and coding scheme (modulation and coding scheme, MCS), etc.; the UE determines whether the downlink SPS is activated and the resource location corresponding to the subsequent downlink SPS by monitoring the PDCCH. When the downlink SPS is activated, the UE will receive the downlink transmission of the SPS in the pre-configured time slot.

When the channel state is poor, the base station can use low-order MCS to transmit data, so as to ensure the correct rate of data transmission; but the use of low-order MCS to transmit data is to ensure the quality of signal transmission at the cost of increasing signal redundancy, reducing the bandwidth utilization efficiency. When the channel state is good, the base station can use high-order MCS to transmit signals, which can improve bandwidth utilization efficiency.

SPS has the characteristics of one configuration and multiple transmissions, that is, after configuration parameters are configured once, all data transmitted by SPS adopts the configured parameters. If it is desired to change configuration parameters, RRC reconfiguration or downlink control information (DCI) reactivation is required. At present, the method of changing the MCS of each SPS is to perform DCI reactivation for each SPS transmission, and the DCI indicates the MCS parameter of this SPS. But each DCI reactivation will introduce additional delay. Since the existing DCI format used for reactivation contains many fields, that is, it occupies a lot of bits, but only 5 bits are used to indicate the MCS, and the rest of the fields are not helpful for changing the MCS. Therefore, frequent reactivation will seriously increase the overhead of system transmission. , will also increase the power consumption of DCI for UE blind detection reconfiguration or reactivation.

Contents of the invention

The present application provides a method and device for data transmission, which can reduce the number of blind detections of DCI or SCI by a terminal device (first device) during SPS transmission, thereby reducing power consumption of the terminal device.

In the first aspect, a data transmission method is provided, and the method can be executed by a chip or a chip system at a receiving end. The method includes: the first device sends the first channel quality information to the second device at the first time; the first device receives the first data sent by the second device at the second time; the first device according to the Decode the first data with the first modulation scheme and/or the first coding scheme in which the first channel quality information has a mapping relationship, where the second time is later than the first time.

Based on the above technical solution, the first device sends the first channel quality information to the second device at the first time; when the first device receives the first data sent by the second device at the second time, it can use the channel quality information and The mapping relationship between the modulation mode and/or the coding mode determines the first modulation mode and/or the first coding mode that has a mapping relationship with the first channel quality information, and decodes the first modulation mode and/or the first coding mode according to the first modulation mode and/or the first coding mode One data; the first device does not need to detect the DCI or SCI to know the modulation mode and/or coding mode used in this SPS transmission, such as the MCS parameter. Therefore, this solution can reduce the number of times the first device (terminal device) blindly detects DCI or SCI during the SPS transmission process, thereby reducing the power consumption of the first device.

With reference to the first aspect, in some implementation manners of the first aspect, the time difference between the second time and the first time is greater than or equal to a first threshold, where the first threshold is predefined, or , the first threshold is determined according to capability information of the second device or indication information of the second device.

With reference to the first aspect, in some implementation manners of the first aspect, the first device receives first configuration information sent by the first device, where the first configuration information includes channel quality information and modulation scheme and/or Or the mapping relationship of encoding methods. The mapping relationship between the channel quality information and the modulation mode and/or the coding mode includes: a mapping relationship between the first channel quality information and the first modulation mode/or the first coding mode.

With reference to the first aspect, in some implementation manners of the first aspect, the first configuration information further includes a first threshold value; when the first channel quality information is greater than or equal to the first threshold value , the first device receives the first data sent by the second device at the second time; the first device according to the first modulation scheme that has a mapping relationship with the first channel quality information And/or the first encoding method, decoding the first data.

With reference to the first aspect, in some implementation manners of the first aspect, when the first channel quality information is less than or equal to the first threshold value, the first device detects at least one second channel quality information at a third time Control information, the third time is not earlier than the second time, the at least one second control information is used to schedule the second data sent by the second device, and the at least one second control information includes The second modulation method and/or the second coding method for decoding the second data.

With reference to the first aspect, in some implementation manners of the first aspect, the first configuration information further includes a first parameter N, where N is a positive integer; when the first device configures When consecutive decoding of N transport blocks in the first data fails, the first device detects at least one piece of second control information at a fourth time, where the fourth time is not earlier than the second time, and the at least One piece of second control information is used to schedule the second data sent by the second device, and the second control information includes a second modulation mode and/or a second coding mode for decoding the second data.

With reference to the first aspect, in some implementation manners of the first aspect, the fourth time is the transmission time of the Nth transmission block in the first data, or the fourth time is the transmission time of the Nth transmission block in the first data The transmission time of the next transport block of the Nth transport block in .

With reference to the first aspect, in some implementation manners of the first aspect, the method further includes: when the first device does not detect the at least one second control information at the fourth time, the first A device decodes a transmission block of the first data according to the first modulation scheme and/or the first coding scheme.

With reference to the first aspect, in some implementation manners of the first aspect, the first configuration information further includes a first parameter N, where N is a positive integer; when the first device configures When the decoding of N consecutive transport blocks in the first data fails, the first device detects the first indication information at the transmission time of the Nth transport block of the first data; when the first device successfully detects When the first indication information is received, the first device detects at least one second control information at a fifth time, and the fifth time is the transmission of the next transport block of the Nth transport block in the first data time, the at least one second control information is used to schedule the second data sent by the second device, and the second control information includes the second modulation method and/or the second Encoding.

With reference to the first aspect, in some implementation manners of the first aspect, the method further includes: when the first device does not detect that the first When the information is indicated, the first device decodes the transmission block of the first data according to the first modulation scheme and/or the first coding scheme.

With reference to the first aspect, in some implementation manners of the first aspect, the first configuration information further includes second indication information, and the second indication information is used to instruct the first device to repeat the channel quality information The number of times the transmission and/or the first device repeatedly transmits the channel quality information. Repeated transmission of the channel quality information by the first device can ensure transmission reliability of the channel quality information.

With reference to the first aspect, in some implementation manners of the first aspect, the first device does not expect the second device to send first control information for scheduling the first data, where the first control The information is used to schedule the initial transmission of the first data; or, the first device detects the first control information used to schedule the first data with a first cycle, and the first cycle is longer than the first Data transmission cycle.

With reference to the first aspect, in some implementation manners of the first aspect, the first data is sent by using semi-persistent scheduling (SPS).

With reference to the first aspect, in some implementation manners of the first aspect, the method further includes: the first device sends an acknowledgment (acknowledgment, ACK) information for the first data to the second device or Negative acknowledgment (negative acknowledgment, NACK) information; if the first device sends the NACK information to the second device, the first device detects third control information at a sixth time, and the sixth time later than the second time, the third control information is used to schedule third data sent by the second device, and the third control information includes a third modulation scheme and /or the third encoding method.

In a second aspect, a data transmission method is provided, and the method can be executed by a chip or a chip system at a sending end. The method includes: the second device receives the first channel quality information sent by the first device at the first time; the second device according to the first modulation mode and/or the first The encoding method is to encode the first data; the second device sends the first data to the first device at a second time, where the second time is later than the first time.

Based on the above technical solution, the second device receives the first channel quality information sent by the first device at the first time; the second device receives the first modulation method and/or the first coding method according to the first modulation method and/or the first coding method having a mapping relationship with the first channel quality information. , to encode the first data; the second device sends the encoded first data to the first device at a second time. After the first device receives the first data sent by the second device at the second time, it may determine the first channel quality information that has a mapping relationship with the first channel quality information according to the mapping relationship between channel quality information and modulation mode and/or coding mode. A modulation method and/or the first coding method, and decode the first data according to the first modulation method and/or the first coding method; the first device does not need to detect the DCI or SCI to know the modulation method and /or encoding method, such as MCS parameters. Therefore, this solution can reduce the number of times the first device (terminal device) blindly detects DCI or SCI during the SPS transmission process, thereby reducing the power consumption of the first device.

With reference to the second aspect, in some implementation manners of the second aspect, the time difference between the second time and the first time is greater than or equal to a first threshold, where the first threshold is predefined, or , the first threshold is determined according to capability information of the second device or indication information of the second device.

With reference to the second aspect, in some implementations of the second aspect, the method further includes: the second device sending first configuration information to the first device, where the first configuration information includes channel quality information Mapping relationship with modulation mode and/or coding mode. The mapping relationship between the channel quality information and the modulation mode and/or the coding mode includes: a mapping relationship between the first channel quality information and the first modulation mode/or the first coding mode.

With reference to the second aspect, in some implementation manners of the second aspect, when the second device successfully receives the first channel quality information, the second device according to the mapping relationship with the first channel quality information The first modulation mode and/or the first coding mode are used to encode the first data.

With reference to the second aspect, in some implementation manners of the second aspect, the first configuration information further includes a first threshold value; when the second device successfully receives the first channel quality information, and the When the first channel quality information is greater than or equal to the first threshold value, the second device performs the The first data is encoded.

With reference to the second aspect, in some implementations of the second aspect, when the second device successfully receives the first channel quality information but the first channel quality information is less than or equal to the first threshold , the second device sends at least one second control information to the first device at a third time, the third time is not earlier than the second time, and the at least one second control information is used for scheduling For the second data sent by the second device, the at least one piece of second control information includes a second modulation mode and/or a second coding mode for decoding the second data.

Based on the above solution, when the first channel quality information is greater than or equal to the first threshold value, the channel quality between the first device and the second device is better, and the second device uses SPS for data transmission, which can reduce the blindness of the first device. The times of checking the control information are increased, thereby reducing the power consumption of the first device. When the first channel quality information is less than or equal to the first threshold, the channel quality between the first device and the second device is poor, and the second device performs data transmission in a dynamic scheduling manner to ensure reliability of data transmission.

With reference to the second aspect, in some implementation manners of the second aspect, the first configuration information further includes a first parameter N, where N is a positive integer; when the second device fails to receive the first channel quality information , the second device sends at least one second control information to the first device at a fourth time, the fourth time is not earlier than the second time, and the at least one second control information is used for scheduling For the second data sent by the second device, the at least one piece of second control information includes a second modulation mode and/or a second coding mode for decoding the second data.

With reference to the second aspect, in some implementation manners of the second aspect, the fourth time is the transmission time of the Nth transmission block in the first data, or the fourth time is the transmission time of the Nth transmission block in the first data The transmission time of the next transport block of the Nth transport block in .

With reference to the second aspect, in some implementation manners of the second aspect, the first configuration information further includes a first parameter N, where N is a positive integer; when the second device fails to receive the first channel quality information , the second device sends the first indication information to the first device at the transmission time of the Nth transport block in the first data; the second device sends the first indication information to the first device at the fifth time Send at least one second control information, the fifth time is the transmission time of the next transport block of the Nth transport block in the first data, and the at least one second control information is used to schedule the second device For the second data to be sent, the at least one piece of second control information includes a second modulation mode and/or a second coding mode for decoding the second data.

Based on the above solution, when the second device does not receive the first channel quality information sent by the first device, if the second device continues to use the SPS method for data transmission, the first device will not be able to correctly decode the received data. Therefore, when the second device does not receive the first channel quality information sent by the first device, the first device transmits data to the first device in a dynamic scheduling manner, which can ensure the reliability of data transmission.

With reference to the second aspect, in some implementation manners of the second aspect, the first configuration information further includes second indication information, and the second indication information is used to instruct the first device to repeat the channel quality information The number of times the transmission and/or the first device repeatedly transmits the channel quality information.

With reference to the second aspect, in some implementation manners of the second aspect, the first data is sent by using semi-persistent scheduling (SPS).

With reference to the second aspect, in some implementations of the second aspect, the method further includes: the second device receiving positive acknowledgment ACK information or negative acknowledgment NACK for the first data sent by the first device information; if the second device receives the NACK information sent by the first device, the second device sends third control information to the first device at a sixth time, and the sixth time is later At the second time, the third control information is used to schedule third data sent by the second device, and the third control information includes a third modulation method and/or for decoding the third data or a third encoding method.

In a third aspect, there is provided a communication device, which can be applied to the first device described in the first aspect, and the device includes: a transceiver unit, configured to send first channel quality information to a second device at a first time; The transceiving unit is further configured to receive the first data sent by the second device at a second time; the processing unit is configured to use the first modulation scheme and/or the second modulation scheme having a mapping relationship with the first channel quality information An encoding manner, decoding the first data, wherein the second time is later than the first time.

With reference to the third aspect, in some implementation manners of the third aspect, the time difference between the second time and the first time is greater than or equal to a first threshold, where the first threshold is predefined, or , the first threshold is determined according to capability information of the second device or indication information of the second device.

With reference to the third aspect, in some implementation manners of the third aspect, the transceiver unit is further configured to receive first configuration information sent by the second device, where the first configuration information includes channel quality information and modulation The mapping relationship between mode and/or encoding mode.

With reference to the third aspect, in some implementation manners of the third aspect, the first configuration information further includes a first threshold value; the transceiver unit is specifically configured to, when the first channel quality information is greater than or equal to When the first threshold value is reached, the first data sent by the second device is received at the second time; the processing unit is specifically configured to, according to a mapping relationship with the first channel quality information The first modulation mode and/or the first coding mode decode the first data.

With reference to the third aspect, in some implementation manners of the third aspect, the transceiver unit is further configured to, when the first channel quality information is less than or equal to the first threshold value, detect at least A piece of second control information, the third time is not earlier than the second time, the at least one second control information is used to schedule the second data sent by the second device, the at least one second control information includes a second modulation scheme and/or a second coding scheme for decoding the second data.

With reference to the third aspect, in some implementation manners of the third aspect, the first configuration information further includes a first parameter N, where N is a positive integer; the transceiver unit is further configured to, when the processing unit according to the When the first channel quality information fails to continuously decode N transport blocks in the first data, at least one second control information is detected at a fourth time, and the fourth time is not earlier than the second time, so The at least one second control information is used to schedule the second data sent by the second device, and the second control information includes a second modulation mode and/or a second coding mode for decoding the second data.

With reference to the third aspect, in some implementation manners of the third aspect, the fourth time is the transmission time of the Nth transmission block in the first data, or the fourth time is the transmission time of the Nth transmission block in the first data The transmission time of the next transport block of the Nth transport block in .

With reference to the third aspect, in some implementation manners of the third aspect, the processing unit is further configured to: when the transceiver unit does not detect the at least one second control information at the fourth time, according to the The first modulation mode and/or the first coding mode are used to decode the transmission block of the first data.

With reference to the third aspect, in some implementation manners of the third aspect, the first configuration information further includes a first parameter N, where N is a positive integer; the transceiver unit is further configured to, when the processing unit according to the When the first channel quality information fails to decode consecutive N transport blocks in the first data, the first indication information is detected at the transmission time of the Nth transport block of the first data; the transceiver unit also uses Therefore, when the first indication information is successfully detected, at least one second control information is detected at a fifth time, and the fifth time is the transmission of the next transport block of the Nth transport block in the first data time, the at least one second control information is used to schedule the second data sent by the second device, and the second control information includes the second modulation method and/or the second Encoding.

With reference to the third aspect, in some implementation manners of the third aspect, the processing unit is further configured to, when the transceiver unit does not detect that the Nth transmission block of the first data is transmitted When the information is indicated, the transmission block of the first data is decoded according to the first modulation mode and/or the first coding mode.

With reference to the third aspect, in some implementation manners of the third aspect, the first configuration information further includes second indication information, and the second indication information is used to instruct the transceiver unit to repeatedly transmit channel quality information And/or the number of times the first device repeatedly transmits the channel quality information.

With reference to the third aspect, in some implementation manners of the third aspect, the transceiver unit does not expect the second device to send first control information for scheduling the first data, where the first control information used to schedule the initial transmission of the first data; or, the transceiver unit is also used to detect the first control information used to schedule the first data with a first cycle, the first cycle is longer than the The transmission period of the first data.

With reference to the third aspect, in some implementation manners of the third aspect, the first data is sent by using semi-persistent scheduling (SPS).

With reference to the third aspect, in some implementation manners of the third aspect, the transceiving unit is further configured to send positive acknowledgment ACK information or negative acknowledgment NACK information for the first data to the second device; The transceiver unit is further configured to: if the NACK information is sent to the second device, detect third control information at a sixth time, the sixth time is later than the second time, and the third control information It is used to schedule the third data sent by the second device, and the third control information includes a third modulation mode and/or a third coding mode used for decoding the third data.

In a fourth aspect, there is provided a communication device, which can be applied to the second device described in the second aspect, and the device includes: a transceiver unit, configured to receive the first channel quality information sent by the first device at a first time a processing unit, configured to encode the first data according to a first modulation scheme and/or a first coding scheme having a mapping relationship with the first channel quality information; the transceiver unit is also configured to, at a second time sending the first data to the first device, wherein the second time is later than the first time.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the time difference between the second time and the first time is greater than or equal to a first threshold, where the first threshold is predefined, or , the first threshold is determined according to capability information of the second device or indication information of the second device.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the transceiver unit is further configured to send first configuration information to the first device, where the first configuration information includes channel quality information and modulation mode And/or the mapping relationship of the encoding method.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the processing unit is specifically configured to, when the transceiver unit successfully receives the first channel quality information, according to information related to the first channel quality information The first modulation mode and/or the first coding mode of the mapping relationship are used to encode the first data.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the first configuration information further includes a first threshold value; the processing unit is specifically configured to, when the transceiver unit receives the first channel When the quality information is successful and the first channel quality information is greater than or equal to the first threshold value, according to the first modulation mode and/or the first coding mode that have a mapping relationship with the first channel quality information, the The first data is encoded.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the transceiver unit is further configured to, when receiving the first channel quality information successfully but the first channel quality information is less than or equal to the first threshold value, at least one second control information is sent to the first device at a third time, the third time is not earlier than the second time, and the at least one second control information is used to schedule the For the second data sent by the second device, the at least one piece of second control information includes a second modulation mode and/or a second coding mode for decoding the second data.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the first configuration information further includes a first parameter N, where N is a positive integer; the transceiver unit is further configured to, when receiving the first channel When the quality information fails, send at least one second control information to the first device at a fourth time, where the fourth time is not earlier than the second time, and the at least one second control information is used to schedule the For the second data sent by the second device, the at least one piece of second control information includes a second modulation mode and/or a second coding mode for decoding the second data.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the fourth time is the transmission time of the Nth transmission block in the first data, or the fourth time is the transmission time of the Nth transmission block in the first data The transmission time of the next transport block of the Nth transport block in .

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the first configuration information further includes a first parameter N, where N is a positive integer; the transceiver unit is further configured to, when receiving the first channel When the quality information fails, send the first indication information to the first device at the transmission time of the Nth transmission block in the first data; The device sends at least one second control information, the fifth time is the transmission time of the next transport block of the Nth transport block in the first data, and the at least one second control information is used to schedule the second For the second data sent by the device, the at least one second control information includes a second modulation mode and/or a second coding mode for decoding the second data.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the first configuration information further includes second indication information, and the second indication information is used to instruct the first device to repeat the channel quality information The number of times the transmission and/or the first device repeatedly transmits the channel quality information.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the first data is sent by using semi-persistent scheduling (SPS).

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the transceiving unit is further configured to receive positive acknowledgment ACK information or negative acknowledgment NACK information for the first data sent by the first device; The transceiving unit is further configured to, if the NACK information sent by the first device is received, send third control information to the first device at the sixth time, the sixth time being later than the At the second time, the third control information is used to schedule the third data sent by the second device, and the third control information includes a third modulation method and/or a third modulation method for decoding the third data. Encoding.

In a fifth aspect, a communication device is provided, including: a processor and a transceiver, the transceiver is used to receive computer codes or instructions and transmit them to the processor, and the processor runs the computer codes or instructions, such as The method in the first aspect or any possible implementation of the first aspect.

In a sixth aspect, a communication device is provided, including: a processor and a transceiver, the transceiver is used to receive computer codes or instructions and transmit them to the processor, and the processor runs the computer codes or instructions, such as The second aspect or the method in any possible implementation of the second aspect.

A seventh aspect provides a communication system, including: the first device in the first aspect or the method described in the second aspect, other communication devices that communicate with the first device, a second device, and a communication device that communicates with the second device other communication equipment for communication.

In an eighth aspect, a computer-readable storage medium is provided, the computer-readable medium stores a computer program; when the computer program runs on a computer, the computer executes any one of the above-mentioned first aspect and the first aspect. Methods in Possible Implementations.

In a ninth aspect, a computer-readable storage medium is provided, the computer-readable medium stores a computer program; when the computer program runs on a computer, the computer executes any one of the above-mentioned second aspect and the second aspect Methods in Possible Implementations.

In a tenth aspect, a computer program product including instructions is provided, and when the instructions are executed by a computer, the communication device implements the above first aspect and the method in any possible implementation manner of the first aspect.

In an eleventh aspect, a computer program product including instructions is provided, and when the instructions are executed by a computer, the communication device implements the method in the above-mentioned second aspect and any possible implementation manner of the second aspect.

Description of drawings

Figure 1 is a schematic diagram of the SPS.

Fig. 2 is a schematic flowchart interaction diagram of a method for data transmission according to an embodiment of the present application.

Fig. 3 is a schematic flowchart interaction diagram of another data transmission method according to an embodiment of the present application.

Fig. 4 is a schematic flowchart interaction diagram of another data transmission method according to an embodiment of the present application.

Fig. 5 is a schematic diagram of the second device transmitting second data to the first device in a dynamic scheduling manner when the first CQI received by the second device from the first device is less than or equal to the CQI threshold.

Fig. 6 is a schematic diagram of the second device transmitting second data to the first device in a dynamic scheduling manner when the second device fails to receive the first CQI sent by the first device.

FIG. 7 is another schematic diagram of the second device transmitting second data to the first device in a dynamic scheduling manner when the second device fails to receive the first CQI sent by the first device.

FIG. 8 is another schematic diagram of the second device transmitting second data to the first device in a dynamic scheduling manner when the second device fails to receive the first CQI sent by the first device.

FIG. 9 is another schematic diagram of the second device transmitting second data to the first device in a dynamic scheduling manner when the second device fails to receive the first CQI sent by the first device.

Fig. 10 is a schematic block diagram of a communication device according to an embodiment of the present application.

Fig. 11 is a schematic block diagram of another communication device according to an embodiment of the present application.

Fig. 12 is a schematic block diagram of a communication device according to an embodiment of the present application.

detailed description

The technical solution in this application will be described below with reference to the accompanying drawings.

The embodiments of the present application can be applied to various communication systems, such as a wireless local area network system (wireless local area network, WLAN), a narrowband Internet of Things system (narrow band-internet of things, NB-IoT), a global system for mobile communication (global system for mobile communications, GSM), enhanced data rate for gsm evolution (EDGE), wideband code division multiple access (WCDMA), code division multiple access 2000 (code division multiple access, CDMA2000 ), time division-synchronization code division multiple access (TD-SCDMA), long term evolution (LTE), satellite communication, fifth generation (5th generation, 5G) system, sideline Link (sidelink, SL) system or a new communication system that will appear in the future.

A communication system applicable to this application includes one or more sending ends and one or more receiving ends. Wherein, the signal transmission between the sending end and the receiving end may be transmitted through radio waves, or may be transmitted through transmission media such as visible light, laser, infrared, and optical fiber.

Exemplarily, one of the sending end and the receiving end may be a terminal device, and the other may be a network device. Exemplarily, both the sending end and the receiving end may be terminal devices.

The terminal devices involved in the embodiments of the present application may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to wireless modems. The terminal can be a mobile station (mobile station, MS), a subscriber unit (subscriber unit), a user equipment (userequipment, UE), a cellular phone (cellular phone), a smart phone (smart phone), a wireless data card, a personal digital assistant (personal digital assistant (PDA) computer, tablet computer, wireless modem (modem), handheld device (handset), laptop computer (laptop computer), machine type communication (machinetype communication, MTC) terminal, etc.

Exemplarily, the network device may be an evolved Node B (evolved Node B, eNB), a radio network controller (radio network controller, RNC), a Node B (Node B, NB), and a base station controller (base station controller, BSC) , base transceiver station (base transceiver station, BTS), home base station (homeevolved NodeB, or home Node B, HNB), baseband unit (baseband unit, BBU), access point in wireless fidelity (wireless fidelity, WIFI) system (access point, AP), wireless relay node, wireless backhaul node, transmission point (transmission point, TP) or transmission and reception point (transmission and reception point, TRP), etc., can also be a new air interface (new radio, NR) gNB or transmission point (for example, TRP or TP), one or a group (including multiple) antenna panels of a base station in NR, or it can also be a network node that constitutes a gNB or transmission point, such as a baseband unit (building baseband unit, BBU) or distributed unit (distributed unit, DU), etc., or, the network device can also be a vehicle device, a wearable device, and a network device in a 5G network, or a network device in a PLMN network that will evolve in the future. limited.

The product forms of network equipment are very rich. For example, during product implementation, the BBU and a radio frequency unit (Radio Frequency Unit, RFU) may be integrated into the same device, and the device is connected to the antenna array through a cable (such as but not limited to a feeder). The BBU and the RFU can also be set separately, and the two are connected through an optical fiber, and communicate through, for example but not limited to, a common public radio interface (common public radio interface, CPRI) protocol. In this case, the RFU is generally called an RRU (remote radio unit, remote radio unit), which is connected to the antenna array through a cable. In addition, the RRU can also be integrated with the antenna array. For example, active antenna unit (active antenna unit, AAU) products currently on the market adopt this structure.

Furthermore, the BBU can be further decomposed into multiple parts. For example, the BBU can be further subdivided into a centralized unit (centralized unit, CU) and a distributed unit (distributed unit, DU) according to the real-time performance of the processed service. CU is responsible for processing non-real-time protocols and services, and DU is responsible for processing physical layer protocols and real-time services. Furthermore, some physical layer functions can be separated from the BBU or DU and integrated in the AAU.

Under the new vision of 5G, the real-time broadband communication (RTBC) scenario aims to support large bandwidth and low interaction delay. The goal is to increase the bandwidth by 10 times under the given delay and reliability requirements, creating An immersive experience when interacting with the virtual world. Among them, extended reality (XR) services with ultra-high bandwidth and ultra-low latency requirements will face more severe challenges for the current 5G. XR mainly includes virtual reality (VR), augmented reality (augmented reality, AR), mixed reality (mixed reality, MR) and other virtual and reality interaction technologies. Wherein, during the downlink transmission process, the XR content of the server will generate data content at a fixed frequency (for example, 60 Hz or 120 Hz), and transmit it to the XR UE by the base station side. In addition, due to the needs of graphics generation, devices such as AR and MR need built-in cameras to collect and continuously upload current scene images at a specific frequency (such as 60Hz). Therefore, AR and MR also impose delay and bandwidth requirements for uplink transmission.

In the current 5G NR scenario, the uplink scheduling methods are divided into two types: dynamic scheduling and configuration authorization-free scheduling. Dynamic scheduling is that when the UE needs to transmit, it sends a transmission request to the base station and reports the amount of transmission information data, and the base station allocates corresponding transmission resources for the UE according to the information reported by the UE. The main problem of such UE-based scheduling request and uplink scheduling grant transmission is that the request and scheduling process will cause a long delay in data transmission, which is difficult to meet the requirements of low-latency services. 5G NR introduces an uplink pre-configuration authorized scheduling-free transmission method, that is, before uplink data transmission, the UE does not need to send a scheduling request to the base station, nor does it need to wait for the base station's uplink scheduling permission, but the UE performs the scheduling on the configured or activated resources. Send uplink data autonomously. For uplink scheduling-free transmission, the base station first configures scheduling-free transmission period parameters for the UE side through RRC signaling, that is, the base station configures transmission resources for the UE in each period, and the UE can send uplink data on the configured resources at this time. It is known that the XR uplink transmission is a periodic service, so the scheduling-free transmission method can be used to allocate transmission resources for the XR uplink service, so as to avoid the extra delay introduced by the scheduling request and the uplink scheduling grant in the dynamic scheduling mode.

In the downlink transmission process, 5G NR also provides two scheduling methods, namely dynamic scheduling and semi-persistent scheduling SPS with authorization. In dynamic scheduling, the UE will always monitor the physical downlink shared channel PDCCH, and judge whether it is a scheduling signaling for the terminal through the cell radio network temporary identifier C-RNTI information carried by the PDCCH. In configuring authorized SPS, the base station configures the downlink SPS resource period through the radio resource control RRC layer, and the UE monitors the PDCCH to determine whether the downlink SPS is activated and the resource location corresponding to the subsequent downlink SPS. After the SPS transmission is activated, the UE can still receive the PDCCH to indicate new service transmission. The base station uses the PDCCH to complete transmission processes such as activation, deactivation of the SPS, and SPS retransmission. When the downlink SPS is activated, the UE will receive the downlink transmission of the SPS in the pre-configured time slot.

The side link SL also provides two scheduling methods, that is, dynamic scheduling and semi-persistent scheduling SPS with authorized configuration. In dynamic scheduling, the receiving UE will always monitor sidelink control information (sidelink control information, SCI) on a physical sidelink control channel (physical sidelink control channel, PSCCH). In the SPS with configuration authorization, the sending UE will configure the downlink SPS resource period through radio resource control RRC signaling, and the receiving UE will monitor the PSCCH to determine whether to activate the downlink SPS and the resource location corresponding to the subsequent downlink SPS. When the downlink SPS is activated, the receiving UE will receive the downlink transmission of the SPS in the pre-configured time slot.

In order to facilitate the understanding of the embodiment of the present application, the prior art related to the embodiment of the present application is briefly introduced.

In wireless transmission, changes in air interface channels can easily cause bit errors in transmitted signals. To solve this problem, the current 3rd generation partnership project (3rd generation partnership project, 3GPP) standard adopts a channel state-based modulation and coding strategy MCS, that is, adjusts parameters of the MCS according to channel conditions. When the channel state is poor, the base station can use the low-order MCS to transmit data, so as to ensure the correct rate of data transmission. However, the use of low-order MCS to transmit data is to ensure the quality of signal transmission at the cost of increasing signal redundancy, which reduces the efficiency of bandwidth utilization. When the channel state is good, the base station can use high-order MCS to transmit signals, which can improve bandwidth utilization efficiency.

In the existing 3GPP standard, two sets of MCS tables are defined for enhanced mobile broadband (eMBB), respectively corresponding to 64 quadrature amplitude modulation (quadrature amplitude modulation, QAM) and 256QAM. As shown in Table 1, it is the MCS table of 64QAM; as shown in Table 2, it is the MCS table of 256QAM.

A set of MCS table is defined for ultra reliable and low latency communication (URLLC), as shown in Table 3. The base station can select a corresponding MCS table for the UE through RRC signaling according to the UE capability. Once the MCS table is selected, the MCS parameters that the base station schedules for the UE can be determined by 5-bit parameters, corresponding to MCS indexes (index) 0-31 in the MCS table.

Table 1

Table 2

table 3

During downlink transmission, the base station cannot know the downlink channel state, so the base station needs the UE to report channel quality indicator information (channel quality indicator, CQI), which is used to inform the base station of the downlink channel state. The reporting of CQI information may be periodic, aperiodic, or semi-persistent. After receiving the CQI information reported by the UE, the base station will refer to the CQI information and adjust the MCS parameters of the next data sent to the UE.

In the case of downlink SPS, the gNB will configure some configuration information for the UE through RRC signaling, such as the SPS transmission period, etc., but when configuring the partial configuration information, it does not activate the SPS transmission, but indicates the activation time through DCI. The DCI also includes other configuration information of the SPS, for example, MCS and time-frequency domain resources. As shown in Figure 1, it is a schematic diagram of the SPS. After the base station configures the UE for SPS transmission, the base station can send the PDCCH scrambled by CS-RNTI to activate SPS transmission and indicate the configuration information used for the first SPS transmission, such as time-frequency domain resources, MCS, etc. After the downlink SPS is configured, the UE will receive the downlink transmission of the SPS within the configured time slot.

Currently, only one transport block (transport block, TB) can usually be scheduled for each SPS transmission, but it is understandable that multiple TBs can also be scheduled for each SPS transmission.

In the case of dynamic scheduling, the MCS information of each physical downlink shared channel (physical downlink shared channel, PDSCH) data of the UE is indicated by downlink control information DCI. The DCI information is used to indicate configuration information of the data to be transmitted this time, such as MCS, time-frequency domain resources, and the like. Although the DCI can be used to configure different parameters for each transmission according to the channel state, which provides flexibility in transmission, but the UE needs to blindly detect the DCI each time to decode the PDSCH resource carried by the DCI. Therefore, in the dynamic scheduling, the UE needs to detect and decode the DCI for each transmission, which increases the power consumption of the UE and increases the scheduling complexity.

In order to ensure the quality of air interface signal transmission, low-order MCS parameters can be configured in the active DCI to improve transmission reliability at the cost of reducing bandwidth utilization efficiency. However, the size of each frame of the XR video service is relatively large. Long-term use of low-order MCS will seriously affect the system capacity, increase the transmission delay of XR frames, and affect user experience.

SPS has the characteristics of one configuration and multiple transmissions, that is, after configuration parameters are configured once, all data transmitted by SPS adopts the configured parameters. If you want to change configuration parameters, RRC reconfiguration or DCI reactivation is required.

At present, the method of changing the MCS of each SPS is to perform DCI reactivation for each SPS transmission, and indicate the MCS parameters of this SPS through the DCI. But DCI reactivation will introduce additional delay. Since the existing DCI format used for reactivation contains many fields, that is, it occupies a lot of bits, but only 5 bits are used to indicate the MCS, and the rest of the fields are not helpful for changing the MCS. Therefore, frequent reactivation will seriously increase the overhead of system transmission. , will also increase the power consumption of the DCI of UE blind detection and reactivation.

To this end, the embodiment of the present application proposes a data transmission method, the first device sends the first channel quality information to the second device at the first time; the first device receives the first channel quality information sent by the second device at the second time data, and decode the first data according to the first modulation scheme and/or the first coding scheme having a mapping relationship with the first channel quality information, wherein the second time is later than the first time. Through this method, the times of blind DCI or SCI detection by the UE during the SPS transmission process can be reduced, thereby reducing the power consumption of the UE.

As shown in FIG. 2 , it shows a schematic flow interaction diagram of a data transmission method 200 proposed by the embodiment of the present application. The method may include but not limited to the following steps.

210. The first device sends measured first channel quality information to the second device at a first time, where the first channel quality information may be channel quality indicator information CQI or channel state information (channel state information, CSI). The first device is a UE, and the second device is a base station; or, the first device is a receiving UE, and the second device is a sending UE.

220. The second device receives the first channel quality information sent by the first device at the first time. It can also be understood that the second device receives the first channel quality information sent by the first device at the first time. Wherein, the first time may be understood as a first time slot or within a first time range.

It should be understood that the sending period of the channel quality information and the SPS transmission period may be consistent or inconsistent. If the transmission period of the channel quality information is inconsistent with the SPS transmission period, for example, the transmission period of the channel quality information is greater than the SPS transmission period, the modulation mode and/or coding mode corresponding to each SPS transmission can refer to the last channel quality information sent by the first device .

230. The second device encodes the first data according to the first modulation mode and/or the first coding mode that have a mapping relationship with the first channel quality information.

Exemplarily, the mapping relationship between the channel quality information and the modulation mode and/or coding mode may be determined by the second device according to historical transmission conditions. Wherein, the above-mentioned mapping relationship between the channel quality information and the modulation mode and/or the coding mode includes: a mapping relationship between the first channel quality information and the first modulation mode/or the first coding mode.

Optionally, the second device may send first configuration information to the first device, where the first configuration information includes a mapping relationship between channel quality information and modulation mode and/or coding mode; the first device may receive the first configuration information sent by the second device. The first configuration information. The first configuration information may be sent through RRC signaling, or may be sent through other methods. The mapping relationship between the channel quality information and the modulation mode and/or coding mode may also be agreed in the protocol. This application does not make specific limitations.

240. The second device sends the encoded first data to the first device at a second time, where the second time is later than the first time. The second time may be understood as a second time slot or within a second time range. The first data is sent by using the semi-persistent scheduling (SPS) transmission method, that is, the second device transmits to the first device through the PDSCH in the time slot of the SPS transmission. of the first data. The embodiment of the present application supports the situation that one or more transmission blocks are scheduled for each SPS transmission.

Specifically, the time difference between the second time and the first time is greater than or equal to a first threshold, and the first threshold is predefined, or the first threshold is based on capability information of the second device or indication information of the second device Sure.

250. The first device receives the first data sent by the second device at a second time. It can be understood that the first device receives the first data sent by the second device at the second time. The first device does not expect the second device to send the first control information for scheduling the first data, or the first device does not detect the first control information for scheduling the first data, the first control information for scheduling the first data 1. Initial transmission of data. Alternatively, the first device detects the first control information for scheduling the first data with a first period, where the first period is greater than a transmission period of the first data.

260. The first device decodes the first data according to the first modulation mode and/or the first coding mode that have a mapping relationship with the first channel quality information. Specifically, the first device determines the first modulation method and/or the first coding method corresponding to the first channel quality information according to the first channel quality information and the mapping relationship between the channel quality information and the modulation method and/or coding method , decoding the first data according to the first modulation mode and/or the first encoding mode, to obtain decoded first data.

Specifically, when the second device successfully receives the first channel quality information sent by the first device, the second device, according to the first modulation method and/or the first coding method having a mapping relationship with the first channel quality information, The first data is encoded. If the second device successfully receives the first channel quality information sent by the first device, it may be understood that the second device receives the first channel quality information sent by the first device and successfully decodes the received first channel quality information.

In the technical solution provided by the embodiment of this application, the second device receives the first channel quality information sent by the first device at the first time; /or the first encoding method, encoding the first data; the second device sends the encoded first data to the first device at a second time. After the first device receives the first data sent by the second device at the second time, it may determine the first channel quality information that has a mapping relationship with the first channel quality information according to the mapping relationship between channel quality information and modulation mode and/or coding mode. A modulation method and/or a first coding method, and decode the first data according to the first modulation method and/or the first coding method; the first device does not need to detect the DCI or SCI to know the modulation method and /or encoding method, such as MCS parameters. Therefore, this solution can reduce the number of times the first device (terminal device) blindly detects DCI or SCI during the SPS transmission process, thereby reducing the power consumption of the first device.

The mapping relationship between channel quality information and modulation schemes and/or coding schemes may be one-to-one correspondence, that is, each piece of channel quality information has a corresponding modulation scheme and/or coding scheme. The mapping relationship between channel quality information and modulation schemes and/or coding schemes may not be one-to-one correspondence, for example, multiple pieces of channel quality information correspond to one modulation scheme and/or coding scheme. The mapping relationship between the channel quality information and the modulation mode and/or coding mode may be a formula or a mapping table.

Exemplarily, the mapping relationship between channel quality information and modulation scheme and/or coding scheme may be the mapping relationship between CQI and MCS.

Optionally, the mapping relationship between CQI and MCS may be a formula.

Exemplarily, when each CQI includes 4 bits, when the base station adopts 256QAM table scheduling, the mapping relationship between CQI and MCS can be expressed by the following formula (1):

Exemplarily, when each CQI includes 4 bits, when the base station adopts 64QAM table scheduling, the mapping relationship between CQI and MCS can be expressed by the following formula (2):

MCS=2CQI-2, 1≤CQI≤15 (2)

Exemplarily, when each CQI includes 5 bits, the mapping relationship between CQI and MCS can be expressed by the following formula (3):

MCS=CQI-1, 1≤CQI≤31 (3)

At this time, for the 64QAM form, the value range of the CQI is 1-29; for the 256QAM, the value range of the CQI is 1-28. This application does not limit the number of bits of the CQI.

Optionally, the mapping relationship between CQI and MCS may be a mapping table.

Exemplarily, as shown in Table 4, it is a CQI-MCS mapping relationship corresponding to 256QAM, and each CQI includes 4 bits (bit).

Table 4

Exemplarily, as shown in Table 5, it is a CQI-MCS mapping relationship corresponding to 64QAM, and each CQI includes 4 bits.

table 5

CQI MCS 1 0 2 2 3 4 4 6 5 8 6 10 7 12 8 14 9 16 10 18 11 20 12 twenty two 13 twenty four 14 26 15 28

The control information in this embodiment of the present application may be DCI or SCI.

Taking the first configuration information as the RRC signaling, the mapping relationship between the channel quality information and the modulation mode and/or coding mode as the mapping relationship between the CQI and the MCS, and the control information as the SCI as an example. The first device may be a receiving UE, and the second device may be a sending UE.

As shown in FIG. 3 , it shows a schematic flow interaction diagram of a data transmission method 300 proposed by the embodiment of the present application.

310. The second device sends RRC signaling to the first device. The RRC signaling includes a mapping relationship between CQI and MCS and an SPS resource period. The mapping relationship between CQI and MCS may be determined and configured by the second device according to historical transmission conditions. .

Exemplarily, the mapping relationship between CQI and MCS may be one-to-one, that is, each CQI has a corresponding MCS.

Exemplarily, the mapping relationship between CQI and MCS may not be one-to-one correspondence, for example, the mapping relationship between CQI and MCS is that multiple CQIs correspond to one MCS.

320. The first device receives RRC signaling sent by the second device.

330. The first device sends (reports) the first CQI obtained by measurement to the second device at the first time, where the first CQI is the CQI obtained by the first device last measurement.

340. The second device receives the first CQI sent by the first device. It should be understood that the sending period of the CQI and the transmission period of the SPS may be consistent or inconsistent. If the CQI sending period is inconsistent with the SPS transmission period, the MCS corresponding to each SPS transmission may refer to the latest CQI sent by the first device.

350. The second device determines a first MCS that has a mapping relationship with the first CQI according to the received first CQI and the mapping relationship between the CQI and the MCS.

Specifically, if the second device successfully receives the first CQI sent by the first device, that is, the second device receives the first CQI and successfully decodes the first CQI, then the second device receives the first CQI and the mapping between the CQI and the MCS relationship, and determine the first MCS that has a mapping relationship with the first CQI.

360. The second device uses the first MCS to encode the first data transmitted by the SPS, and sends the first data encoded by using the first MCS to the first device through the PDSCH at a second time.

370. The first device receives first data sent by the second device. The first device does not need to detect the first SCI for scheduling the first data.

380. The first device determines, according to the first CQI and the mapping relationship between the CQI and the MCS, a first MCS that has a mapping relationship with the last reported first CQI, and decodes the encoded first data according to the first MCS , to obtain the decoded first data.

Optionally, the first configuration information further includes a first threshold. The first threshold is a threshold of channel quality information. The first threshold may be determined according to information such as historical channel quality information, average code rate requirements of services, and the like.

When the second device successfully receives the first channel quality information sent by the first device and the first channel quality information is greater than or equal to the first threshold, the second device considers that the communication between the second device and the first device If the channel quality is good enough to guarantee the reliability of the SPS data transmission, the SPS transmission is used for this transmission. Specifically, the second device encodes the first data according to the first modulation scheme and/or the first coding scheme that have a mapping relationship with the first channel quality information.

Each time the first device sends the measured channel quality information to the second device, it needs to compare the measured channel quality information with the first threshold. Correspondingly, when the first device determines that the first channel quality information is greater than or equal to the first threshold value, the first device considers that the second device uses the SPS transmission mode for data transmission in this transmission, and the first device performs data transmission in the second The time receives the first data sent by the second device, and decodes the first data according to the first modulation mode and/or the first coding mode having a mapping relationship with the first channel quality information.

When the second device successfully receives the first channel quality information sent by the first device but the first channel quality information is less than or equal to the first threshold value, the second device considers that the communication between the second device and the first device If the channel quality is poor and the reliability of the SPS data transmission cannot be guaranteed, the second device cancels the SPS transmission and uses dynamic scheduling to transmit data in the time slot corresponding to the SPS transmission to ensure data transmission reliability. Specifically, the second device sends at least one piece of second control information to the first device at a third time. The at least one second control information is used to schedule the second data sent by the second device, and the at least one second control information includes a second modulation mode and/or a second coding mode for decoding the second data; the second The device sends to the second device second data encoded by using the second modulation mode and/or the second coding mode. The second data is sent in a dynamically scheduled sending manner. The third time is not earlier than the second time.

Each time the first device sends the measured channel quality information to the second device, it needs to compare the measured channel quality information with the first threshold. Correspondingly, when the first device determines that the first channel quality information is less than or equal to the first threshold, the first device considers that data transmission is performed in a dynamic scheduling manner this time. Specifically, the first device detects at least one second control information at a third time, the at least one second control information is used to schedule the second data sent by the second device, and the at least one second control information includes information for decoding The second modulation method and/or the second coding method of the second data; the first device receives the second data sent by the second device according to the at least one second control information, and according to the second modulation method and/or the second coding method , to decode the second data.

Wherein, the third time may be the same as the second time, and the third time may also be later than the second time.

Based on the above solution, when the first channel quality information is greater than or equal to the first threshold value, the channel quality between the first device and the second device is better, and the second device uses SPS for data transmission, which can reduce the blindness of the first device. The times of checking the control information are increased, thereby reducing the power consumption of the first device. When the first channel quality information is less than or equal to the first threshold, the channel quality between the first device and the second device is poor, and the second device performs data transmission in a dynamic scheduling manner to ensure reliability of data transmission.

Taking the first configuration information as the RRC signaling, the mapping relationship between the channel quality information and the modulation mode and/or coding mode as the mapping relationship between the CQI and the MCS, and the control information as the SCI as an example. The first device may be a receiving UE, and the second device may be a sending UE.

As shown in FIG. 4 , it shows a schematic flowchart interaction diagram of another data transmission method 400 proposed by the embodiment of the present application.

410. The second device sends RRC signaling to the first device, where the RRC signaling includes a mapping relationship between CQI and MCS, a first threshold value, and an SPS resource period, where the first threshold value is a CQI threshold value, and the CQI The threshold value may be determined according to information such as historical channel quality information, average code rate requirements of services, and the like.

Exemplarily, the mapping relationship between CQI and MCS may be one-to-one, that is, each CQI has a corresponding MCS.

Exemplarily, the mapping relationship between CQI and MCS may not be one-to-one correspondence, for example, the mapping relationship between CQI and MCS is that multiple CQIs correspond to one MCS.

420. The first device receives RRC signaling sent by the second device.

430. The first device sends (reports) the first CQI obtained by measurement to the second device at the first time, where the first CQI is the CQI obtained by the first device last measurement.

440. The second device receives the first CQI from the first device at a first time. It should be understood that the sending period of the CQI and the transmission period of the SPS may be consistent or inconsistent. If the CQI sending period is inconsistent with the SPS transmission period, the MCS corresponding to each SPS transmission may refer to the latest CQI sent by the first device.

450. The second device judges whether the last received first CQI is greater than or equal to a first threshold.

When the second device successfully receives the first CQI sent by the first device, and the first CQI is greater than or equal to the first threshold, the second device determines the The first CQI has a mapping relationship with the first MCS. The second device transmits data to the first device through the SPS transmission mode, that is, step 460 is executed.

When the second device successfully receives the first CQI sent by the first device, but the first CQI is less than or equal to the first threshold value, the second device transmits data to the first device through a dynamically scheduled transmission mode, that is, executes step 470 .

460. The second device encodes the first data of the SPS transmission according to the first MCS, and sends the first data encoded by using the first MCS to the first device in a time slot of the SPS transmission. In this case, the first device does not need to detect the PSCCH.

470. The second device sends at least one second SCI and second data to the first device at a third time, the at least one second SCI is used to schedule the second data, and the at least one second SCI includes The second data is the second MCS. The third time is not earlier than the second time. In this case, the second device needs to detect the PSCCH.

480. The first device determines whether the first CQI reported to the second device last time is greater than or equal to a first threshold. When the first CQI is greater than or equal to the CQI threshold, the first device receives the first data sent by the second device on the PSCSH according to resource information configured by the second device.

The first device determines the first MCS that has a mapping relationship with the last reported first CQI according to the first CQI and the mapping relationship between the CQI and the MCS. And decode the encoded first data according to the first MCS to obtain the decoded first data.

490. When the first device determines that the first CQI reported to the second device last time is less than or equal to the CQI threshold, the first device detects at least one second SCI sent by the second device at a third time, and according to the at least one second SCI, A second SCI receives the second data sent by the second device, the at least one second SCI includes a second MCS for decoding the second data, and the first device uses the second MCS in the at least one second SCI Decode the second data to obtain decoded second data.

Optionally, the RRC signaling may further include a first parameter N, where N is less than or equal to M, M is the number of transport blocks included in the data sent by the second device to the first device, and M and N are positive integers. When the first device determines that the first CQI reported to the second device last time is less than or equal to the CQI threshold, and the first device fails to detect at least one second SCI sent by the second device at the third time, the first The device detects the first indication information at the next transmission time of the second SCI; when the first device successfully detects the first indication information, the first device detects at least one piece of fourth control information at a seventh time, and the seventh time is the first The transmission time of the next transport block of the Nth transport block in the data, at least one piece of fourth control information is used to schedule the fourth data sent by the second device, and the fourth control information includes the fourth information used to decode the fourth data Modulation mode and/or fourth coding mode.

As shown in FIG. 5, it shows a method that when the second device receives the first CQI sent by the first device is less than or equal to the CQI threshold value, the second device transmits the second data to the first device in a dynamic scheduling manner. schematic diagram.

The second device receives the first CQI (CQI1) at U00, if the first CQI is less than or equal to the CQI threshold value, the second device considers that the channel quality between the second device and the first device is poor, If the reliability of the SPS data transmission cannot be guaranteed, the second device cancels the SPS transmission, and performs data transmission in a time slot corresponding to the SPS transmission by means of dynamic scheduling. The time corresponding to this SPS transmission is D10-D13. U00 can be understood as the first time, and D10 can be understood as the second time.

The second device may send the at least one second SCI to the first device at a third time, the third time being no earlier than the second time. That is, the third time may be the same time as the second time, or the third time may be later than the second time. Taking the third time being the same time as the second time as an example, the second device starts to send at least one second SCI to the first device at D10, and the at least one second SCI is used for scheduling the second data.

Correspondingly, after the first device sends the first CQI to the second device at U00, if it determines that the first CQI is less than or equal to the CQI threshold, it considers that the second device will use dynamic scheduling to perform this data transmission. The first device may start detecting at D10 that the second device sends at least one second SCI.

Optionally, the first configuration information may further include a first parameter N. It should be understood that each data sent by the second device to the first device includes M transmission blocks, where M is greater than or equal to N, and M and N are positive integers. The first parameter N is used to indicate that when the first device fails to decode N consecutive transport blocks in the first data, the first device needs to judge whether the second device has received the first channel quality information. If the first channel quality information is obtained, it can be confirmed that the second device uses the dynamic scheduling transmission method instead of the SPS transmission method for this data transmission; the first parameter N can also be used to indicate that the second device is in the first data The transmission time of the Nth transmission block or the transmission time of the next transmission block of the Nth transmission block in the first data is dynamically scheduled to transmit data to the first device.

In one implementation, when the second device fails to receive the first channel quality information, the second device will not be able to allocate the correct modulation mode and/or coding mode for this SPS transmission, which will cause the first device to be unable to correctly decode the first channel quality information. a data. Therefore, the second device may cancel the SPS transmission, and perform data transmission in a dynamic scheduling manner. Specifically, the second device may send at least one second control information to the first device at a fourth time, where the fourth time is not earlier than the second time, and the at least one second control information is used to schedule the first control information sent by the second device. Two data, the at least one second control information includes a second modulation method and/or a second encoding method used to decode the second data; the second device transmits to the second device using the second modulation method and/or the second The encoded second data in the encoding mode. The second data is sent in a dynamically scheduled sending manner. If the second device fails to receive the first channel quality information, it can be understood that the second device does not receive the first channel quality information sent by the first device, or the second device fails to decode the first channel quality information sent by the first device .

Exemplarily, the fourth time is the transmission time of the Nth transmission block in the first data, or, the fourth time is the transmission time of the next transmission block of the Nth transmission block in the first data. The second time can also be understood as the transmission time of the first transmission block in the first data. When N is equal to 1, the fourth time is the same time as the second time.

It should be understood that when the second device fails to receive the first channel quality information, the transmission block sent by the second device to the first device at the transmission time of the first N transmission blocks of the first data is empty, therefore, the first device will Decoding failed for N consecutive transport blocks in the first data.

Correspondingly, when the first device fails to decode N consecutive transport blocks in the first data according to the first channel quality information, the first device judges whether the second device receives the first channel quality information by detecting control information. Specifically, the first device detects at least one second control information at a fourth time, the at least one second control information is used to schedule the second data sent by the second device, and the at least one second control information includes information for decoding The second modulation method and/or the second coding method of the second data; the first device receives the second data sent by the second device according to the at least one second control information, and according to the second modulation method and/or the second coding method , to decode the second data.

It should be understood that when the first device fails to decode N consecutive transport blocks in the first data, the first device needs to determine whether the second device has received the first channel quality information, and the first device detects the second channel quality information sent by the second device. For control information, if the second control information is detected, the first device determines that the second device has not received the first channel quality information, and the first device may consider that the second device sends the second data in a dynamically scheduled transmission manner. If the first device only fails to decode one of the N consecutive transport blocks in the first data, it cannot be determined that the second device has not successfully received the first channel quality information, and it may be that the first device is unable to decode Something went wrong. Therefore, the limitation that the first device fails to decode N consecutive data blocks in the first data is for the second device to successfully receive the first channel quality information sent by the first device and send it to the first device in SPS mode. In the case of the first data, when the first device only fails to decode a certain data block in the first data, it is avoided that the first device mistakenly believes that the second device has not successfully received the first channel quality information and detects the second channel quality information. Blind detection overhead caused by control information.

When the first device does not detect at least one piece of second control information at the fourth time, the first device continues to decode other transmission blocks of the first data according to the first modulation mode and/or the first coding mode, and sends The second device feeds back ACK information or NACK information for the first data. It should be understood that when the first device fails to decode N consecutive transport blocks in the first data according to the first channel quality information, it also sends NACK information corresponding to the N transport blocks to the second device.

Based on the above solution, when the second device does not receive the first channel quality information sent by the first device, if the second device continues to use the SPS method for data transmission, the first device will not be able to correctly decode the received data. Therefore, when the second device does not receive the first channel quality information sent by the first device, the first device transmits data to the first device in a dynamic scheduling manner, which can ensure the reliability of data transmission.

Taking the first configuration information as the RRC signaling, the mapping relationship between the channel quality information and the modulation mode and/or coding mode as the mapping relationship between the CQI and the MCS, and the control information as the SCI as an example. The first device may be a receiving UE, and the second device may be a sending UE.

Optionally, the RRC signaling may further include a first parameter N, where N is less than or equal to M, M is the number of transport blocks included in the data sent by the second device to the first device, and M and N are positive integers.

When the second device fails to receive the first CQI sent by the first device, that is, when the second device fails to receive the first CQI sent by the first device or fails to decode the first CQI sent by the first device, the second device will The correct MCS parameter cannot be allocated for this SPS transmission, therefore, it may cause the UE to fail to decode correctly. For this reason, the second device cancels the current SPS transmission, and transmits the second data to the first device in a dynamic scheduling manner at a time corresponding to the current SPS transmission.

Exemplarily, the second device sends at least one second SCI and second data to the first device at a fourth time, the at least one second SCI is used to schedule the second data, and the at least one second SCI includes The second MCS for decoding the second data. The fourth time is not earlier than the second time. Exemplarily, the fourth time is the transmission time of the Nth transport block in the first data, or is the transmission time of the next transport block of the Nth transport block in the first data time. It can be understood that the fourth time may also be the transmission time of several transport blocks after the Nth transport block.

Correspondingly, if the first device fails to decode N consecutive transport blocks in the first data sent by the second device according to the first MCS, the first device detects at least one second SCI at a fourth time, and performs The at least one second SCI receives the second data sent by the second device, the at least one second SCI includes a second MCS for decoding the second data, and the first device uses the at least one second SCI according to the second data in the at least one second SCI The second MCS decodes the second data to obtain decoded second data.

It should be understood that the determination that the second device does not receive the first CQI when the first device fails to decode consecutive N data blocks in the first data is for the purpose of determining that the second device has not received the first CQI when the second device successfully receives the first CQI sent by the first device. When the first data is sent to the first device with CQI and SPS, when the first device fails to decode only one of the N consecutive data blocks in the first data, the first device is prevented from erroneously It is considered that the second device does not receive the first CQI successfully, but detects the blind detection overhead caused by the second SCI.

As shown in FIG. 6 , it shows a schematic diagram of the second device transmitting the second data to the first device in a dynamic scheduling manner when the second device fails to receive the first CQI sent by the first device. Take the fourth time as the transmission time of the Nth transmission block in the first data, where N is equal to 1, and M is equal to 4 as an example. This detection sequence is valid only for SPS transmissions and is valid with the activation of the active SCI.

Wherein, the MCS corresponding to each SPS transmission is determined according to the last CQI reported by the first device. For example, the MCS corresponding to the SPS data at D00-D03 is determined according to CQI0; in the next SPS transmission, the second device sends SPS data at time D10-D13, and the MCS corresponding to this SPS transmission is based on the last reported CQI1 (first CQI) determined.

The second device does not receive the CQI1 (the first CQI) at U00, so that the second device cannot allocate the MCS parameter corresponding to the CQI1 for this SPS transmission. The time corresponding to this SPS transmission is D10-D13. Among them, U00 can be understood as the first time, and D10 can be understood as the second time; since the fourth time is the transmission time of the Nth transmission block in the first data, and N is equal to 1, the fourth time is the transmission time of the Nth transmission block in the first data. The transmission time of the first transmission block, that is, D10 may be understood as a fourth time, and in this case, the fourth time may be the same time as the second time.

The second device may transmit the data to be transmitted in the SPS transmission at D10-D13 in a dynamic scheduling manner, that is, the second device transmits the second data at D10-D13 in a dynamic scheduling manner. Specifically, the second device starts to send at least one second SCI to the first device at D10, and the at least one second SCI is used for scheduling the second data. The second data may be the same as or different from the first data; the second MCS may be the same as or different from the first MCS.

Correspondingly, when the first device fails to decode the first data at D10 according to the MCS having a mapping relationship with CQI1, the first device may detect at least one second SCI sent by the second device at D10, if the first device is in When the second SCI is detected at D10, the first device will detect the second SCI at four consecutive transmission times starting from this time (D10), and 4 may be the default number of transmission blocks in the first data; if the first device After detecting the second SCI, the first device may feed back NACK/ACK for the second data to the second device. It should be understood that when the first device fails to decode the first data at D10, the first device may feed back NACK information for the first data to the second device. It should be understood that the number of transport blocks in data can also be configured through RRC signaling.

If the first device does not detect the second SCI at D10 or fails to detect the second SCI, the second device continues to decode the first data at D11-D13 according to the MCS that has a mapping relationship with CQI1, that is, the second device decodes the first data according to the SPS The manner decodes the first data at D11-D13, and feeds back NACK/ACK for the first data to the second device.

As shown in FIG. 7 , it shows another schematic diagram of the second device transmitting the second data to the first device in a dynamic scheduling manner when the second device fails to receive the first CQI sent by the first device. Take the fourth time as the transmission time of the Nth transmission block in the first data, where N is equal to 2, and M is equal to 4 as an example.

The second device does not receive the CQI1 (the first CQI) at U00, so that the second device cannot allocate the MCS parameter corresponding to the CQI1 for this SPS transmission. The time corresponding to this SPS transmission is D10-D13, that is, each SPS transmission transmits M=4 transmission blocks. Among them, U00 can be understood as the first time, and D10 can be understood as the second time; since the fourth time is the transmission time of the Nth transmission block in the first data, and N is equal to 2, the fourth time is the time in the first data The transmission time of the second transmission block, that is, D11 can be understood as the fourth time.

The second device may transmit the data to be transmitted in this SPS transmission in a dynamic scheduling manner at D11-D14, that is, the second device transmits the second data in a dynamic scheduling manner at D11-D14. Specifically, the second device starts to send at least one second SCI to the first device at D11, where the at least one second SCI is used to schedule second data. It should be understood that the second data may be the same as or different from the first data; the second MCS may be the same as or different from the first MCS.

Correspondingly, when the first device fails to decode the first data at D10 and D11 according to the MCS having a mapping relationship with CQI1, the first device may detect at least one second SCI sent by the second device at D11, if the first When the device detects the second SCI, the first device will detect the second SCI for 4 consecutive times starting from the current time (D11), where 4 may be the default amount of time for SPS transmission.

If the first device does not detect the second SCI at D11 or fails to detect the second SCI, the second device continues to decode the first data at D12 and D13 according to the MCS that has a mapping relationship with CQI1, that is, the second device decodes the first data according to the SPS The manner decodes the first data at D12 and D13, and feeds back NACK/ACK for the first data to the second device.

As shown in FIG. 8 , it shows another schematic diagram of the second device transmitting the second data to the first device in a dynamic scheduling manner when the second device fails to receive the first CQI sent by the first device. Take the fourth time as the transmission time of the next transport block of the Nth transport block in the first data, where N is equal to 2, and M is equal to 4 as an example.

The second device does not receive the CQI1 (the first CQI) at U00, so that the second device cannot allocate the MCS parameter corresponding to the CQI1 for this SPS transmission. The time corresponding to this SPS transmission is D10-D13, that is, each SPS transmission transmits 4 transmission blocks. Among them, U00 can be understood as the first time, and D10 can be understood as the second time; since the fourth time is the transmission time of the Nth transmission block in the first data, and N is equal to 2, the fourth time is the time in the first data The transmission time of the next transmission block of the second transmission block, that is, D12 may be understood as the fourth time.

The second device may transmit the data to be transmitted in the SPS transmission at D12-D15 in a dynamic scheduling manner, that is, the second device transmits the second data in a dynamic scheduling manner at D12-D15. Specifically, the second device starts to send at least one second SCI to the first device at D12, and the at least one second SCI is used for scheduling the second data. It should be understood that the second data may be the same as or different from the first data; the second MCS may be the same as or different from the first MCS.

Correspondingly, when the first device fails to decode the first data at D10 and D11 according to the MCS having a mapping relationship with CQI1, the first device may detect at least one second SCI sent by the second device at D12, if the first The device detects the second SCI, and the first device detects the second SCI for 4 consecutive times starting from the current time (D12), where 4 may be the default time amount of SPS transmission.

If the first device does not detect the second SCI at D12 or fails to detect the second SCI, the second device continues to decode the first data at D12 and D13 according to the MCS that has a mapping relationship with CQI1, that is, the second device decodes the first data according to the SPS The manner decodes the first data at D12 and D13, and feeds back NACK/ACK for the first data to the second device.

In another implementation, when the second device fails to receive the first channel quality information, the second device will not be able to allocate the correct modulation mode and/or coding mode for this SPS transmission, which will cause the first device to fail to decode correctly first data. Therefore, the second device may cancel the SPS transmission, and perform data transmission in a dynamic scheduling manner. Specifically, the second device sends first indication information to the first device at the transmission time of the Nth transmission block of the first data, and the first indication information may be used to instruct the first device to stop SPS detection; the second device Send at least one second control information to the first device at a fifth time, where the fifth time is the transmission time of the next transport block of the Nth transport block in the first data, and the at least one second control information is used to schedule the Nth transport block For the second data sent by the second device, the at least one second control information includes a second modulation method and/or a second coding method for decoding the second data; the second device sends to the first device using the second modulation method And/or the second data encoded by the second encoding method.

It should be understood that when the second device fails to receive the first channel quality information, the transmission block sent by the second device to the first device at the transmission time of the first N transmission blocks of the first data is empty, therefore, the first device will Decoding failed for N consecutive transport blocks in the first data.

Correspondingly, when the first device fails to decode N consecutive transport blocks in the first data according to the first channel quality information, the first device detects the first indication information at the transmission time of the Nth transport block of the first data ; When the first device successfully detects the first indication information, the first device believes that the second device uses dynamic scheduling to perform this data transmission, and the first device detects at least one second control information at the fifth time, the The fifth time is the transmission time of the next transport block of the Nth transport block in the first data, and the at least one second control information is used to schedule the second data sent by the second device, and the at least one second control information includes The second modulation method and/or the second coding method used to decode the second data; the first device receives the second data sent by the second device according to the at least one second control information, and according to the second modulation method and/or the first In the second encoding mode, the second data is decoded.

When the first device does not detect the first indication information at the transmission time of the Nth transmission block of the first data, or when the first device does not detect the second control information at the fifth time, the first device according to the first A modulation mode and/or a first coding mode, decoding other transmission blocks of the first data, and feeding back ACK information or NACK information for the first data to the second device.

Optionally, when the second device fails to receive the first channel quality information, the second device may also transmit the first data to the first device at the transmission time of the N+1th transmission block or the N+2th transmission block Send the first indication information. Correspondingly, when the first device fails to decode N consecutive transport blocks in the first data according to the first channel quality information, the first device decodes the N+1th transport block or the N+2th transport block of the first data The transmission time of the transmission block detects the first indication information. This application does not specifically limit it.

It should be understood that the first indication information may be pre-configured or configured through RRC.

Taking the first configuration information as the RRC signaling, the mapping relationship between the channel quality information and the modulation mode and/or coding mode as the mapping relationship between the CQI and the MCS, and the control information as the SCI as an example. The first device may be a receiving UE, and the second device may be a sending UE.

Optionally, the RRC signaling may further include a first parameter N, where N is less than or equal to M, M is the number of transport blocks included in the data sent by the second device to the first device, and M and N are positive integers. The RRC signaling may also include configuration information of the first indication information.

When the second device fails to receive the first CQI sent by the first device, that is, when the second device fails to receive the first CQI sent by the first device or fails to decode the first CQI sent by the first device, the second device will The correct MCS parameter cannot be allocated for this SPS transmission, therefore, it may cause the UE to fail to decode correctly. For this reason, the second device cancels the current SPS transmission, and transmits the second data to the first device in a dynamic scheduling manner at a time corresponding to the current SPS transmission.

Exemplarily, the second device sends first indication information to the first device at the transmission time of the Nth transmission block in the first data, and the first indication information is used to instruct the terminal device to stop SPS detection, and at the fifth time sending at least one second SCI and second data to the first device, the at least one second SCI is used to schedule the second data sent by the second device, and the at least one second SCI includes a second MCS. The fifth time is the transmission time of the next transport block of the Nth transport block in the first data.

Correspondingly, when the first device fails to decode consecutive N transport blocks in the first data sent by the second device according to the first MCS, the first device will Detecting the first indication information; when the first device successfully detects the first indication information, the first device believes that the second device adopts the dynamic scheduling method for this data transmission, then the first device detects at least one second SCI, and receive the second data sent by the second device according to the at least one second SCI, the at least one second SCI includes a second MCS for decoding the second data, and the first device according to the at least one The second MCS in the second SCI decodes the second data to obtain decoded second data.

As shown in FIG. 9 , it shows another schematic diagram of the second device transmitting the second data to the first device in a dynamic scheduling manner when the second device fails to receive the first CQI sent by the first device. Take N equal to 1 and M equal to 4 as an example. This detection sequence is valid only for SPS transmissions and is valid with the activation of the active SCI.

The second device does not receive the CQI1 (the first CQI) at U00, so that the second device cannot allocate the MCS parameter corresponding to the CQI1 for this SPS transmission. The time corresponding to this SPS transmission is D10-D13. Among them, U00 can be understood as the first time, and D10 can be understood as the second time; since the fifth time is the transmission time of the next transport block of the Nth transport block in the first data, and N is equal to 1, the fifth time is the transmission time of the second transmission block in the first data, that is, D11 can be understood as the fifth time.

The second device transmits the second data in a dynamic scheduling manner at D11-D14. Specifically, the second device sends first indication information to the first device at D10, the first indication information is used to instruct the terminal device to stop SPS detection; the second device starts to send at least one second SCI to the first device at D11 , the at least one second SCI is used to schedule second data.

Correspondingly, when the first device fails to decode the first data at D10 according to the MCS having a mapping relationship with CQI1, the first device may detect the first indication information at D10; when the first device detects the first indication information at D10 When the information is indicated, the first device believes that the second device uses dynamic scheduling to perform this data transmission, and the first device starts to detect at least one second SCI sent by the second device at D11, and according to the at least one second SCI The SCI receives the second data sent by the second device.

If the first device does not detect the first indication information at D10 or fails to detect the second SCI, the second device continues to decode the first data at D11-D13 according to the MCS that has a mapping relationship with CQI1, that is, the second device decodes the first data according to In the SPS mode, the first data is decoded at D11-D13, and NACK/ACK for the first data is fed back to the second device.

In another implementation manner, when the second device fails to receive the first channel quality information, the second device may send the first indication information to the first device at a preconfigured transmission time; correspondingly, when the first device fails to receive the first channel quality information according to When the first channel quality information fails to decode the transport block in the first data, the first device may detect the first indication information sent by the first device at the preconfigured transmission time, and when the first device successfully detects the first indication information , the first device detects at least one piece of second control information at a fifth time. Wherein, the preconfigured transmission time may be configured through the first configuration information.

It should be understood that the first control information, the second control information, and the third control information in this embodiment of the present application may be different control information, such as DCI or SCI.

If the second device does not receive the channel quality information sent (reported) by the first device, it will not be able to determine the modulation mode and/or coding mode adopted by the SPS data, which will result in SPS transmission failure. To solve this problem, optionally, the first configuration information further includes second indication information, where the second indication information is used to instruct the first device to repeatedly transmit the channel quality information, and/or the first device to transmit the channel quality information The number of times the quality information is retransmitted. Repeated transmission of the channel quality information by the first device can ensure transmission reliability of the channel quality information. Wherein, when the second indication information instructs the first device to repeatedly transmit the channel quality information, the number of times of repeated transmission may be 3 times by default.

The first device may also send positive acknowledgment (acknowledgment, ACK) information or negative acknowledgment (negative acknowledgment, NACK) information for the first data to the second device. If the first device sends NACK information for the first data to the second device, the second device may send third control information to the first device at the sixth time, the sixth time is later than the second time, and the third control The information is used to schedule the third data, and the third control information includes a third modulation mode and/or a third coding mode used for decoding the third data. The third data may or may not be the same as the first data. Correspondingly, the first device may detect the third control information at the sixth time.

It should be understood that if the first device fails to decode N consecutive transport blocks in the first data and the first device does not detect the second control information, the first device detects the third control information at a sixth time. Specifically, if the number of HARQ feedback information received by the second device is less than or equal to the number of transport blocks of the first data, and all of them are NACK, the second device may consider that the first device has not received the second control information or is incorrect. To decode the second data, the second device may send third control information to the first device at a sixth time.

It should be understood that in the embodiments of the present application, an indication may generally explicitly and/or implicitly indicate what it represents and/or. Illustratively, the implicit indication may be based on the location and/or resources used for transmission. An explicit indication may be based on one or more parameters, and/or one or more indices, and/or one or more bit patterns it represents. Instructions can also be understood as "comprising".

An embodiment of the present application proposes a communication device, as shown in FIG. 10 , which shows a schematic block diagram of a communication device 1000 according to the embodiment of the present application. The apparatus may be applied to the first device in the embodiment of the present application. The communication device 1000 includes:

A transceiver unit 1010, configured to send first channel quality information to a second device at a first time;

The transceiving unit 1010 is further configured to receive the first data sent by the second device at a second time;

A processing unit 1020, configured to decode the first data according to a first modulation scheme and/or a first coding scheme having a mapping relationship with the first channel quality information, wherein the second time is later than the first for a while.

Optionally, the time difference between the second time and the first time is greater than or equal to a first threshold, where the first threshold is predefined, or the first threshold is based on the second The capability information of the device or the indication information of the second device is determined.

Optionally, the transceiving unit 1010 is further configured to receive first configuration information sent by the second device, where the first configuration information includes a mapping relationship between channel quality information and modulation schemes and/or coding schemes.

Optionally, the first configuration information further includes a first threshold;

The transceiving unit 1010 is specifically configured to, when the first channel quality information is greater than or equal to the first threshold, receive the first data sent by the second device at the second time;

The processing unit 1020 is specifically configured to decode the first data according to the first modulation scheme and/or the first coding scheme that have a mapping relationship with the first channel quality information.

Optionally, the transceiving unit 1010 is further configured to detect at least one second control information at a third time when the first channel quality information is less than or equal to the first threshold, and the third time No earlier than the second time, the at least one second control information is used to schedule the second data sent by the second device, and the at least one second control information includes information for decoding the second data The second modulation method and/or the second coding method.

Optionally, the first configuration information further includes a first parameter N, where N is a positive integer;

The transceiver unit 1010 is further configured to detect at least one piece of second control information at a fourth time when the processing unit fails to continuously decode N transport blocks in the first data according to the first channel quality information , the fourth time is not earlier than the second time, the at least one second control information is used to schedule the second data sent by the second device, and the second control information includes information for decoding the A second modulation mode and/or a second coding mode of the second data.

Optionally, the fourth time is the transmission time of the Nth transmission block in the first data, or the fourth time is the transmission time of the next transmission block of the Nth transmission block in the first data transmission time.

Optionally, the processing unit 1020 is further configured to, when the transceiver unit does not detect the at least one second control information at the fourth time, according to the first modulation mode and/or the second control information, In an encoding manner, the transport block of the first data is decoded.

Optionally, the first configuration information further includes a first parameter N, where N is a positive integer;

The transceiver unit 1010 is further configured to, when the processing unit fails to decode consecutive N transmission blocks in the first data according to the first channel quality information, in the Nth transmission block of the first data Block transmission time detection first indication information;

The transceiver unit 1010 is further configured to detect at least one second control information at a fifth time when the first indication information is successfully detected, and the fifth time is the Nth transmission block in the first data The transmission time of the next transmission block, the at least one second control information is used to schedule the second data sent by the second device, and the second control information includes the second information used to decode the second data modulation method and/or second coding method.

Optionally, the processing unit 1020 is further configured to, when the transceiver unit does not detect the first indication information at the transmission time of the Nth transmission block of the first data, according to the first modulation mode and/or the first encoding mode, and decode the transport block of the first data.

Optionally, the first configuration information further includes second indication information, and the second indication information is used to instruct the transceiver unit to repeatedly transmit channel quality information and/or the first device to perform channel quality information Number of times to make repeated transfers.

Optionally, the transceiving unit does not expect the second device to send first control information for scheduling the first data, where the first control information is used for scheduling the initial transmission of the first data; or ,

The transceiving unit 1010 is further configured to detect the first control information for scheduling the first data with a first cycle, the first cycle being longer than a transmission cycle of the first data.

Optionally, the first data is sent in a semi-persistent scheduling (SPS) manner.

Optionally, the transceiving unit 1010 is further configured to send positive acknowledgment ACK information or negative acknowledgment NACK information for the first data to the second device;

The transceiving unit 1010 is further configured to, when the NACK information is sent to the second device, detect third control information after the second time, the third control information is used to schedule the second device For the third data sent by the device, the third control information includes a third modulation scheme and/or a third coding scheme for decoding the third data.

The embodiment of the present application proposes another communication device, as shown in FIG. 11 , which shows a schematic block diagram of another communication device 1100 according to the embodiment of the present application. The apparatus may be applied to the second device in the embodiment of the present application. The communication device 1100 includes:

A transceiver unit 1110, configured to receive first channel quality information sent by the first device at a first time;

a processing unit 1120, configured to encode the first data according to a first modulation scheme and/or a first coding scheme having a mapping relationship with the first channel quality information;

The transceiving unit 1110 is further configured to send the first data to the first device at a second time, wherein the second time is later than the first time.

Optionally, the time difference between the second time and the first time is greater than or equal to a first threshold, where the first threshold is predefined, or the first threshold is based on the second The capability information of the device or the indication information of the second device is determined.

Optionally, the transceiving unit 1110 is further configured to send first configuration information to the first device, where the first configuration information includes a mapping relationship between channel quality information and modulation schemes and/or coding schemes.

Optionally, the processing unit 1120 is specifically configured to: when the transceiver unit successfully receives the first channel quality information, according to the first modulation scheme and/or the second modulation scheme having a mapping relationship with the first channel quality information, An encoding mode, encoding the first data.

Optionally, the first configuration information further includes a first threshold;

The processing unit 1120 is specifically configured to, when the transceiver unit successfully receives the first channel quality information and the first channel quality information is greater than or equal to the first threshold value, according to the first The channel quality information has a first modulation scheme and/or a first coding scheme with a mapping relationship, and encodes the first data.

Optionally, the transceiving unit 1110 is further configured to, when receiving the first channel quality information successfully but the first channel quality information is less than or equal to the first threshold value, send a message to the The first device sends at least one second control information, the third time is not earlier than the second time, the at least one second control information is used to schedule the second data sent by the second device, the At least one piece of second control information includes a second modulation scheme and/or a second coding scheme for decoding the second data.

Optionally, the first configuration information further includes a first parameter N, where N is a positive integer;

The transceiving unit 1110 is further configured to, when receiving the first channel quality information fails, send at least one second control information to the first device at a fourth time, where the fourth time is no earlier than the first Two times, the at least one second control information is used to schedule the second data sent by the second device, and the at least one second control information includes a second modulation method and/or used to decode the second data or the second encoding method.

Optionally, the fourth time is the transmission time of the Nth transmission block in the first data, or the fourth time is the transmission time of the next transmission block of the Nth transmission block in the first data transmission time.

Optionally, the first configuration information further includes a first parameter N, where N is a positive integer;

The transceiver unit 1110 is further configured to, when receiving the first channel quality information fails, send first indication information to the first device at the transmission time of the Nth transmission block in the first data;

The transceiver unit 1110 is further configured to send at least one piece of second control information to the first device at a fifth time, the fifth time being the next transmission block of the Nth transmission block in the first data Transmission time, the at least one second control information is used to schedule the second data sent by the second device, and the at least one second control information includes a second modulation method and/or used to decode the second data or the second encoding method.

Optionally, the first configuration information further includes second indication information, and the second indication information is used to instruct the first device to repeatedly transmit channel quality information and/or the first device to perform channel quality information The number of times the message is retransmitted.

Optionally, the first data is sent in a semi-persistent scheduling (SPS) manner.

Optionally, the transceiving unit 1110 is further configured to receive positive acknowledgment ACK information or negative acknowledgment NACK information for the first data sent by the first device;

The transceiving unit 1110 is further configured to, when receiving the NACK information sent by the first device, send third control information to the first device after the second time, the third control information It is used to schedule the third data sent by the second device, and the third control information includes a third modulation mode and/or a third coding mode used for decoding the third data.

An embodiment of the present application provides a communication device 1200 , as shown in FIG. 12 , which shows a schematic block diagram of the communication device 1200 according to the embodiment of the present application.

The communication device 1200 includes: a processor 1210 and a transceiver 1220, the transceiver 1220 is used to receive computer codes or instructions and transmit them to the processor 1210, and the processor 1210 runs the computer codes or instructions to Implement the method in the embodiment of this application. The communication device may be a terminal device or a network element of a core network in the embodiment of the present application.

The above-mentioned processor 1210 may be an integrated circuit chip, which has a signal processing capability. In the implementation process, each step of the above-mentioned method embodiments may be completed by an integrated logic circuit of hardware in a processor or instructions in the form of software. The aforementioned processor may be a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other available Program logic devices, discrete gate or transistor logic devices, discrete hardware components. Various methods, steps, and logic block diagrams disclosed in the embodiments of the present application may be implemented or executed. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register. The storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.

The embodiment of the present application also provides a communication system, including the first device in the data transmission method provided in the embodiment of the present application, other communication devices communicating with the first device, a second device, and a communication device communicating with the second device other communication equipment for communication.

The embodiment of the present application also provides a computer-readable storage medium, on which a computer program for implementing the method in the above method embodiment is stored. When the computer program runs on the computer, the computer can implement the methods in the above method embodiments.

The embodiment of the present application also provides a computer program product, the computer program product includes computer program code, and when the computer program code is run on the computer, the method in the above method embodiment is executed.

The embodiment of the present application also provides a chip, including a processor, the processor is connected to a memory, the memory is used to store a computer program, and the processor is used to execute the computer program stored in the memory, so that the The chip executes the method in the above method embodiment.

It should be understood that in this embodiment of the application, the numbers "first", "second"... are only used to distinguish different objects, such as different devices or different times, and do not limit the scope of this embodiment of the application. The embodiment of the present application is not limited thereto.

In addition, the term "and/or" in this application is only an association relationship describing associated objects, indicating that there may be three relationships, for example, A and/or B may indicate: A exists alone, and A and B exist simultaneously , there are three cases of B alone. In addition, the character "/" in this article generally means that the contextual objects are an "or" relationship; the term "at least one" in this application can mean "one" and "two or more", for example, A , B and C, can mean: A exists alone, B exists alone, C exists alone, A and B exist simultaneously, A and C exist simultaneously, C and B exist simultaneously, A, B and C exist simultaneously, these seven kinds Condition.

Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may implement the described functionality using different methods for each particular application, but such implementation should not be considered as exceeding the scope of the present application.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.

If the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disk or optical disk and other various media that can store program codes. .

The above is only a specific implementation of the application, but the scope of protection of the application is not limited thereto. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the application. Should be covered within the protection scope of this application. Therefore, the protection scope of the present application should be determined by the protection scope of the claims.

Claims (30)

1. A method of data transmission, comprising:

the first equipment sends first channel quality information to the second equipment at a first time;

the first device receives first data sent by the second device at a second time;

and the first equipment decodes the first data according to a first modulation mode and/or a first coding mode which has a mapping relation with the first channel quality information, wherein the second time is later than the first time.

2. The method of claim 1,

the time difference of the second time later than the first time is greater than or equal to a first threshold, wherein the first threshold is predefined, or the first threshold is determined according to the capability information of the second device or the indication information of the second device.

3. The method according to claim 1 or 2, characterized in that the method further comprises:

the first device receives first configuration information sent by the second device, wherein the first configuration information includes a mapping relation between first channel quality information and a first modulation mode and/or a first coding mode.

4. The method of claim 3, wherein the first configuration information further comprises a first threshold value;

when the first channel quality information is greater than or equal to the first threshold value, the first device receives the first data at the second time;

and the first equipment decodes the first data according to the first modulation mode and/or the first coding mode.

5. The method of claim 4,

when the first channel quality information is less than or equal to the first threshold, the first device detects at least one piece of second control information at a third time, where the third time is not earlier than the second time, the at least one piece of second control information is used to schedule second data sent by the second device, and the at least one piece of second control information includes a second modulation scheme and/or a second coding scheme used to decode the second data.

6. The method according to claim 3 or 4, wherein the first configuration information further includes a first parameter N, where N is a positive integer;

when the first device fails to decode N transport blocks of the first data continuously according to the first channel quality information, the first device detects at least one piece of second control information at a fourth time, where the fourth time is not earlier than the second time, the at least one piece of second control information is used to schedule second data sent by the second device, and the second control information includes a second modulation scheme and/or a second coding scheme used to decode the second data.

7. The method of claim 6,

the fourth time is a transmission time of an nth transmission block in the first data, or the fourth time is a transmission time of a next transmission block of the nth transmission block in the first data.

8. The method according to claim 6 or 7, characterized in that the method further comprises:

when the first device does not detect the at least one second control information at the fourth time, the first device decodes the transport block of the first data according to the first modulation scheme and/or the first coding scheme.

9. The method according to claim 3 or 4, wherein the first configuration information further includes a first parameter N, where N is a positive integer;

when the first device fails to decode the N continuous transmission blocks in the first data according to the first channel quality information, the first device detects first indication information at the transmission time of the Nth transmission block of the first data;

when the first device successfully detects the first indication information, the first device detects at least one piece of second control information at a fifth time, where the fifth time is a transmission time of a next transport block of an nth transport block in the first data, and the at least one piece of second control information is used to schedule second data sent by the second device, and the second control information includes a second modulation scheme and/or a second coding scheme used to decode the second data.

10. The method of claim 9, further comprising:

when the first device does not detect the first indication information at the transmission time of the nth transmission block of the first data, the first device decodes the transmission block of the first data according to the first modulation mode and/or the first coding mode.

11. The method according to any one of claims 3 to 10, wherein the first configuration information further includes second indication information, and the second indication information is used to indicate that the first device performs repeated transmission of channel quality information and/or the number of times that the first device performs repeated transmission of channel quality information.

12. The method according to any one of claims 1 to 11,

the first device does not expect the second device to send first control information for scheduling the first data, wherein the first control information is used for scheduling the first data to be primarily transmitted; or the like, or, alternatively,

the first device detects the first control information for scheduling the first data with a first period, the first period being greater than a transmission period of the first data.

13. The method according to any one of claims 1 to 12,

the first data is transmitted by a semi-persistent scheduling (SPS) transmission mode.

14. The method according to any one of claims 1 to 13, further comprising:

the first device sending positive acknowledgement, ACK, information or negative acknowledgement, NACK, information for the first data to the second device;

if the first device sends the NACK information to the second device, the first device detects at least one third control information at a sixth time, where the sixth time is later than the second time, the third control information is used to schedule third data sent by the second device, and the third control information includes a third modulation scheme and/or a third coding scheme used to decode the third data.

15. A method of data transmission, comprising:

the second equipment receives first channel quality information sent by the first equipment at a first time;

the second equipment encodes first data according to a first modulation mode and/or a first coding mode which has a mapping relation with the first channel quality information;

the second device transmits the first data to the first device at a second time, wherein the second time is later than the first time.

16. The method of claim 15,

the time difference of the second time later than the first time is greater than or equal to a first threshold, wherein the first threshold is predefined, or the first threshold is determined according to the capability information of the second device or the indication information of the second device.

17. The method according to claim 15 or 16, characterized in that the method further comprises:

and the second equipment sends first configuration information to the first equipment, wherein the first configuration information comprises the mapping relation between the first channel quality information and the first modulation mode and/or the first coding mode.

18. The method according to any of claims 15 to 17, wherein when the second device successfully receives the first channel quality information, the second device encodes the first data according to the first modulation scheme and/or a first coding scheme.

19. The method of claim 17, wherein the first configuration information further comprises a first threshold value;

and when the second device successfully receives the first channel quality information and the first channel quality information is greater than or equal to the first threshold value, the second device codes the first data according to a first modulation mode and/or a first coding mode which have a mapping relation with the first channel quality information.

20. The method of claim 19,

when the second device successfully receives the first channel quality information but the first channel quality information is less than or equal to the first threshold value, the second device sends at least one piece of second control information to the first device at a third time, where the third time is not earlier than the second time, the at least one piece of second control information is used for scheduling second data sent by the second device, and the at least one piece of second control information includes a second modulation scheme and/or a second coding scheme used for decoding the second data.

21. The method of claim 17, wherein the first configuration information further includes a first parameter N, N being a positive integer;

when the second device fails to receive the first channel quality information, the second device sends at least one piece of second control information to the first device at a fourth time, where the fourth time is not earlier than the second time, the at least one piece of second control information is used to schedule second data sent by the second device, and the at least one piece of second control information includes a second modulation scheme and/or a second coding scheme used to decode the second data.

22. The method of claim 21,

the fourth time is a transmission time of an nth transmission block in the first data, or the fourth time is a transmission time of a next transmission block of the nth transmission block in the first data.

23. The method of claim 17, wherein the first configuration information further includes a first parameter N, N being a positive integer;

when the second device fails to receive the first channel quality information, the second device sends first indication information to the first device at the transmission time of the Nth transport block in the first data;

the second device sends at least one piece of second control information to the first device at a fifth time, where the fifth time is a transmission time of a next transport block of an nth transport block in the first data, the at least one piece of second control information is used to schedule second data sent by the second device, and the at least one piece of second control information includes a second modulation scheme and/or a second coding scheme used to decode the second data.

24. The method according to any one of claims 17 to 23, wherein the first configuration information further includes second indication information, and the second indication information is used to indicate that the first device performs repeated transmission of channel quality information and/or the number of times that the first device performs repeated transmission of channel quality information.

25. The method of any one of claims 15 to 24,

the first data is transmitted by a semi-persistent scheduling (SPS) transmission mode.

26. The method of any one of claims 15 to 25, further comprising:

the second equipment receives positive Acknowledgement (ACK) information or Negative Acknowledgement (NACK) information which is sent by the first equipment and aims at the first data;

if the second device receives the NACK information sent by the first device, the second device sends third control information to the first device at a sixth time, where the sixth time is later than the second time, the third control information is used to schedule third data sent by the second device, and the third control information includes a third modulation scheme and/or a third coding scheme used to decode the third data.

27. A communications device comprising means to implement the functionality of the method of any of claims 1 to 14 or claims 15 to 26.

28. A communication device, comprising: a processor and a transceiver for receiving computer code or instructions and transmitting the computer code or instructions to the processor, the processor executing the computer code or instructions, the method of any of claims 1 to 14 or claims 15 to 26.

29. A computer-readable storage medium, comprising

The computer readable medium stores a computer program;

the computer program, when run on a computer, causes the computer to perform the method of any one of claims 1 to 26.

30. A computer program product, comprising a computer program that, when executed, causes the method of any of claims 1 to 26 to be carried out.

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