WO2019174006A1

WO2019174006A1 - Data transmission method and device

Info

Publication number: WO2019174006A1
Application number: PCT/CN2018/079177
Authority: WO
Inventors: 魏冬冬; 汪凡; 夏斌; 张朝贤
Original assignee: 华为技术有限公司
Priority date: 2018-03-15
Filing date: 2018-03-15
Publication date: 2019-09-19
Also published as: CN111869174B; CN111869174A

Abstract

A data transmission method and device; when applying the data transmission method, spreading first data so as to obtain spread first data; combining the spread first data with second data to obtain combined data, transmitting the combined data on a time-frequency resource so that the first data and the second data use the same time-frequency resource and are simultaneously transmitted at the same frequency, thus service data capacity may be increased. The method provided in the present embodiment may be applied to various communication systems, such as V2X, LTE-V, V2V, Internet of Vehicles, MTC, ΙοΤ, LTE-M, M2M, the Internet of Things, and the like.

Description

Data transmission method and device

Technical field

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

Background technique

The development of communication technology makes communication systems need to support the transmission of multiple types of communication data. In long term evolution (LTE) systems or 5G new radio (NR) systems, a variety of different service types can be supported, such as Various types of services, such as broadcast service, multicast service, unicast service, and machine type communication; and all adopt orthogonal multiplex frequency division multiplexing (OFDM) to multiplex data of different services. Transfer to different time-frequency resources. For example, non-unicast data such as broadcast service data and multicast service data is usually transmitted in a time division manner, a frequency division manner, and a time-frequency resource in which unicast data is multiplexed.

At present, data of different services is multiplexed to different time-frequency resources for transmission, and there is a problem that service data capacity is degraded. For example, non-unicast data is transmitted by using time-frequency resources for multiplexing unicast data in a time division manner. The time-frequency resource for transmitting the unicast data is multiplexed by the frequency division method, and the time-frequency resource for transmitting the unicast data is occupied, and the time-frequency resource of the unicast data that is occupied and transmitted cannot simultaneously transmit the unicast data, and thus cannot be simultaneously transmitted. The avoided time-frequency resources for transmitting unicast data are reduced, which in turn leads to a decrease in the unicast service data capacity.

Summary of the invention

The embodiment of the present application provides a data sending method and device to improve service data capacity.

In a first aspect, the embodiment of the present application provides a data sending method, which may be applied to a network device, or may also be applied to a chip inside a network device. In the method, the first data is spread to obtain the first data after the spread, and the spread first data and the second data are combined to obtain the combined data, and the combined data is in time. Send on the frequency resource.

In a second aspect, the present application provides a data receiving method, which may be applied to a terminal, or may also be applied to a chip inside the terminal. In the method, in the method, the second data and the spread first data are received on the time-frequency resource, and the spread-first data is despread to obtain the first data.

Specifically, if there is no second data in the received data, and only the first data after the spread spectrum, the received data may be despread, and then the despread data is demodulated to obtain the first data, so as to improve the receiving. The signal to noise ratio of the first data. If the received data includes the second data and the first data after the spreading, the second data may be demodulated to obtain the second data, the first data after the spread spectrum is despread, and then the despread data is demodulated to obtain the first data. After despreading and demodulating the received data to obtain the first data, the first data in the received data is eliminated by the serial interference cancellation method to obtain the second data.

In a third aspect, the present application provides a data transmitting apparatus, including: a unit or means for performing the steps of the above first aspect.

In a fourth aspect, the present application provides a data transmitting apparatus including at least one processor and a memory, the at least one processor for performing the method provided by the above first aspect.

In a fifth aspect, the present application provides a data transmitting apparatus including at least one processor and an interface circuit, the at least one processor for performing the method provided by the above first aspect.

In a sixth aspect, the present application provides a data transmitting program for performing the method of the above first aspect when executed by a processor.

In a seventh aspect, a program product, such as a computer readable storage medium, comprising the program of the sixth aspect is provided.

It can be seen that, in the above aspects, the first data is spread and then merged with the second data, and the combined data is sent on the time-frequency resource, so that the first data and the second data after the spread use the same time-frequency resource. At the same time, it is transmitted at the same frequency, which can increase the service data capacity.

In the above aspects, the first data may be non-unicast data, and the non-unicast data may be, for example, broadcast service data, multicast service data, or the like. The second data can be unicast data.

The first data and the second data after the spreading are combined, and any one of the following methods may be adopted:

Manner 1: For the first data after modulation and after the spread spectrum processing and the modulated second data, different transmit powers are allocated, and the first data after being modulated and subjected to the spread spectrum processing is transmitted on the same time-frequency resource and The modulated second data. Manner 2: for the first data after modulation and after the spread spectrum processing and the modulated second data, the power ratio is allocated, the first data after being modulated and subjected to the spread spectrum processing according to the allocated power ratio, and after the modulation The second data is merged into the third data.

In the embodiment of the present application, the time-frequency resource used for transmitting the combined data may be a time-frequency resource that originally sends the second data.

In a possible design, the length of the spreading sequence used for spreading the first data in the embodiment of the present application should be configured within a limited range of the maximum value and the minimum value of the length of the spreading sequence, so that after the spread spectrum The service rate of the first data transmission should meet the minimum service rate requirement, and the spread of the first data is performed after the minimum length of the spread spectrum sequence is used to satisfy the coverage requirement of the first data.

In a possible implementation manner, in the embodiment of the present application, the symbols available in the time unit for transmitting the first data may be grouped, and the length of the available symbols in the group obtained by the group is used as the first data to be spread. The length of the spreading sequence.

The time unit for transmitting the first data may be a subframe, a time slot, or the like.

In the embodiment of the present application, the length of the spreading sequence used for spreading the first data may be an exemplary length configuration range of {2, 3, 4, 5, 6, 7, 11, 12, 13} Where the length unit can be a symbol.

In another possible implementation manner, in the embodiment of the present application, the length of the spreading sequence used for spreading the first data may be indicated by the indication information.

The first indication information may indicate a number of groups obtained by grouping symbols available in a time unit in which the first data is transmitted, and a length of available symbols in each group.

When the first data is the broadcast service data, the first indication information may be system information, for example, in the LTE system, the system information may be SIB2 or SIB13. In the NR system, the system information can also be an OSI. When the first data is multicast service data, the first indication information may be DCI.

In another possible design, when the second data and the spread first data are simultaneously transmitted on the time-frequency resource of the second data, the power used to transmit the spread first data is smaller than the transmission. The power of the second data is used to reduce the impact on the transmission of the second data by transmitting the spread first data on the time-frequency resource that transmits the second data.

In another possible design, the power used to transmit the spread first data and the power to transmit the second data may be indicated by the second indication information.

The second indication information may be used to indicate a ratio between the power used to transmit the spread first data and the power of the second data, to indicate the power used to transmit the spread first data, and The power of the second data is sent.

The first indication information may be system information, for example, in an LTE system, the system information may be SIB2 or SIB13. In the NR system, the system information can also be an OSI. When the first data is multicast service data, the second indication information may be DCI.

In another possible design, in the embodiment of the present application, when the second data and the spread first data are simultaneously transmitted on the time-frequency resource of the second data, the first data after the spread is used. The length of the CP is the same as the length of the CP that transmits the second data, so as to avoid interference and simplify the processing complexity of receiving data as much as possible. The CP used for transmitting the second data and the first data after the spreading may be an extended CP or a normalCP.

DRAWINGS

1 is a structural diagram of a communication system to which a data transmission method according to an embodiment of the present application is applied;

FIG. 2 is a schematic diagram of a scenario applied to a data sending method according to an embodiment of the present disclosure;

FIG. 3 is a flowchart of implementing a data sending method according to an embodiment of the present application;

4 is a schematic diagram of determining a length of a spreading sequence according to an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a data sending apparatus according to an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a data receiving apparatus according to an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a network device according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of a terminal according to an embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

Please refer to FIG. 1 , which is a schematic diagram of a communication system according to an embodiment of the present application. As shown in FIG. 1, the terminal performs wireless access through an access link provided by a high altitude platform station (HAPS), and the HAPS communicates with the ground gateway through a dedicated backhaul link, and returns user data, and further connects. Into the Internet.

The terminal is also called a user equipment (UE), a mobile station (MS), a mobile terminal (MT), etc., and is a device that provides voice and/or data connectivity to users. For example, a handheld device having a wireless connection function, an in-vehicle device, or the like. Currently, some examples of terminals are: mobile phones, tablets, laptops, PDAs, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality. (augmented reality, AR) equipment, wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in remote medical surgery, smart grid Wireless terminals, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, and the like.

The HAPS integrates the functions of the network device, where the network device is a device in the wireless network, for example, may be a radio access network (RAN) node that accesses the terminal to the wireless network, and the RAN node may also be referred to as a base station. At present, some examples of network devices are: a Node B (gNB) that continues to evolve, a transmission reception point (TRP), an evolved Node B (eNB), and a radio network controller (radio network controller, RNC), Node B (NB), base station controller (BSC), base transceiver station (BTS), home base station (for example, home evolved NodeB, or home Node B, HNB) , a base band unit (BBU), or a wireless fidelity (Wifi) access point (AP). In addition, in a network structure, the RAN may include a centralized unit (CU) node and a distributed unit (DU) node. This structure separates the protocol layer of the eNB in the long term evolution (LTE) system, and the functions of some protocol layers are centrally controlled in the CU, and the functions of the remaining part or all of the protocol layers are distributed in the DU by the CU. Centrally control the DU.

Scalable, HAPS can also be data relay. The network device is placed on the ground side. After the network device sends the signal to the HAPS, the HAPS forwards the signal to the terminal.

Please refer to FIG. 2 , which is an application scenario according to an embodiment of the present application. In the application scenario, a terminal can support both a unicast service and a broadcast service. The HAPS may transmit a unicast signal through one or more small beams, or may transmit a multicast signal through one or more small beams, or transmit a broadcast signal through a large beam equivalently synthesized by all the small beams. Generally, when the HAPS transmits a broadcast signal, the OFDM method is used to transmit the time-frequency resources of the unicast signal by time division or frequency division. However, regardless of whether the broadcast signal uses the time division method or the frequency division method, multiplexing and transmitting the time-frequency resources of the unicast signal for transmission, the time-frequency resources for transmitting the unicast signal are occupied, and the occupied time-frequency resources cannot be simultaneously transmitted. The unicast signal, in turn, reduces the time-frequency resources for transmitting the unicast signal, thereby causing the data capacity of the unicast service to decrease.

In view of this, the embodiment of the present application provides a data sending method, in which a first data (for example, non-unicast data such as broadcast service data and multicast service data) is spread to obtain a first spread spectrum. Data, combining the spread first data with the second data (for example, unicast data) to obtain the combined data, and transmitting the combined data on the time-frequency resource, so that the first data and the second data The data uses the same time-frequency resources and is transmitted at the same frequency, which in turn can increase the service data capacity.

FIG. 3 is a flowchart of a method for transmitting data according to an embodiment of the present application. Referring to FIG. 3, the method includes:

S101: Perform spreading on the first data to obtain the first data after spreading.

In the embodiment of the present application, the first data may be non-unicast data such as broadcast service data and multicast service data that are sent by the HAPS to the terminal in the coverage area of the HAPS. The HAPS integrated with the network device function may perform channel coding and modulation on the first data and then perform spreading to obtain the first data after spreading.

Specifically, in the embodiment of the present application, the first data is a symbol stream {s ₀ , s ₁ , s ₂ , . . . , s _l-1 } having a length of ₁ , and the first data after the spreading is X _{b is taken} as an example. Description. For a symbol stream {s ₀ , s ₁ , s ₂ , ..., s _l-1 } of length _l , spread spectrum with a spreading sequence of length m to obtain a spread symbol stream X _b = {s _{0 , 0} , s _0,1 , s _0,2 ,...s _0,m-1 ,s _1,0 ,s _1,1 ,s _1,2 ,...s _1,1 _,m-1 ,s _2,0 ,s _2,1 ,s _2,2 ,...s _2,m-1 ,...,s _l-1,0 ,s _l-1,1 ,s _l-1,2 ,...s _l-1,m-1 } The spread symbol stream length is ml.

The length of the spreading sequence used for spreading the first data in the embodiment of the present application should be configured within a limited range of the maximum value and the minimum value of the length of the spreading sequence. For example, the maximum value of the length of the spreading sequence can be determined by the lowest service rate, that is, after the non-unicast data is spread by using the maximum length of the spreading sequence, the service rate of the first data transmission after the spreading should be Meet the minimum business rate requirements. The minimum value of the length of the spreading sequence can be determined according to the coverage requirement of the first data, that is, after the first data is spread-spectrum processed by using the minimum length of the spreading sequence, the coverage requirement of the first data is satisfied.

In a possible example, in the embodiment of the present application, the symbols available in the time unit for transmitting the first data may be grouped, and the length of the available symbols in the group obtained by the group is used as the extension used for spreading the first data. The length of the frequency sequence. In this embodiment, the available symbols in the time unit for transmitting the first data may be used as one packet, and the length of the available symbols in the entire time unit may be used as the length of the spreading sequence used for spreading the first data. The symbols available in the time unit in which the first data is transmitted are divided into a plurality of packets, and the length of the available symbols in the group is used as the length of the spreading sequence used for spreading the first data in each packet. The time unit for transmitting the first data may be a subframe, a time slot, or the like. Of course, the specific form of the time unit for transmitting the first data is not limited. In a possible implementation, the time unit is a subframe. In the embodiment of the present application, the symbols available in the subframe in which the first data is transmitted may be grouped according to time slots. For example, as shown in FIG. 4, in the LTE system, each subframe includes two slots, which are slot0 and slot1, five symbols are available in slot0, and seven symbols are available in slot1. The first data transmitted in slot 0 may be spread by using a spreading sequence of length 5, and the first data transmitted in slot 1 may be spread by using a spreading sequence of length 7. It can be understood that, in the embodiment of the present application, other implementations for grouping available symbols in a subframe in which the first data is transmitted may be used, for example, when grouping the symbols available in the subframe in which the first data is transmitted, the entire In the sub-frame. In another possible implementation manner, the time unit in the embodiment of the present application may be a time slot, and the available symbols in each time slot may be grouped. For example, in an LTE system, each subframe includes two time slots (slots). ), respectively, slot0 and slot1, there are 5 available symbols in slot0, there are 7 available symbols in slot1, and 5 available symbols in slot0 can be divided into two groups, and

symbols

2 and 3 are divided into one group. Symbol 4, symbol 5, and symbol 6 are divided into one group. The 7 available symbols in slot 1 are divided into three packets, the

symbols

7 and 8 are divided into one packet, the

symbols

9 and 10 are divided into one packet, and the

symbols

11, 12 and 13 are divided into one packet. When the first data is transmitted on symbol 2 and symbol 3 of slot 0, spreading may be performed using a spreading sequence of length 2, and the spread first data is transmitted on

symbols

2 and 3. When the first data is transmitted on symbol 4, symbol 5, and symbol 6 of slot 0, spreading may be performed using a spreading sequence of length 3, and the spreaded first data is transmitted on symbol 4, symbol 5, and symbol 6. . When the first data is sent on the symbol of slot 1, the implementation process is similar and will not be described in detail herein.

In the embodiment of the present application, the length of the spreading sequence used for spreading the first data may be indicated by the indication information. For the convenience of description in the embodiment of the present application, the indication information indicating the length of the spreading sequence used for spreading the first data may be referred to as first indication information.

Specifically, when the length of the spreading sequence used for spreading the first data is indicated by the first indication information, the number of groups obtained by grouping the symbols available in the subframe in which the first data is transmitted may be indicated, and The length of the symbols available within each group.

When the first data is the broadcast service data, the first indication information may be system information. For example, in the LTE system, the system information may be a system information block (SIB) 2 or an SIB 13 . In the NR system, the system information may also be on-demand system information (OSI). When the first data is multicast service data, the first indication information may be downlink control information (DCI).

S102: Combine the spread first data with the second data to obtain the combined data.

In the embodiment of the present application, the first data and the second data after the spreading may be combined by using any one of the following methods:

Method 1: For the first data after modulation and after the first data of the spread spectrum processing and the second data after modulation, the network device allocates different transmission powers, and after transmitting the modulation on the same time-frequency resource and after performing the spread spectrum processing One data and the second data after modulation. In other words, the combined data includes the spread-spectrum processed first data and the modulated second data transmitted on the same time-frequency resource.

Method 2: For the first data after modulation and after the first data of the spread spectrum processing and the second data after modulation, the network device allocates a power ratio, and the first data after being modulated and subjected to the spread spectrum processing according to the allocated power ratio, And the modulated second data is merged into the third data. In other words, the combined data includes the third data transmitted on the time-frequency resource.

In the embodiment of the present application, the first ml symbols of the second data symbol stream may be represented by X _u . In the embodiment of the present application, the second data may be unicast data that is sent by the HAPS to the terminal in the coverage area of the HAPS. The HAPS superimposes the symbol stream X _b with the symbol stream X _u to obtain the combined data X=X _b +X _u .

In the embodiment of the present application, after the HAPS superimposes and combines the symbol stream X _b and the symbol stream X _u , the combined data X=X _b +X _u can be mapped to the time-frequency resource for transmission. Specifically, the HAPS maps the merged data X=Xb+Xu to the time-frequency resource, and maps the m spread symbols obtained by spreading a single modulation symbol to consecutive m symbols corresponding to a certain subcarrier or maps Up to consecutive m subcarriers.

S103: Send the combined data on the time-frequency resource.

In the embodiment of the present application, the time-frequency resource used for transmitting the combined data may be a time-frequency resource that originally sends the second data. In other words, in the embodiment of the present application, the combined data is sent on the time-frequency resource, which can be understood as mapping the spread first data to the time-frequency resource that sends the second data, and simultaneously with the second data. Frequency transmission.

When the first data is broadcast data, the HAPS may perform the OFDM time-frequency resource mapping on the spread first data, and map the spread first data to the consecutive m times on the time-frequency resource that sends the second data. On the OFDM subcarrier. Wherein, when the first data is broadcast data, the location of the mapping start symbol may be a predefined fixed location. For example, if the predefined fixed location is symbol 2, the mapping start symbol of the broadcast data is fixed to symbol 2 regardless of the number of symbols of the physical downlink control channel (PDCCH). Or the start symbol of the broadcast data mapping can be notified by the system message and remains fixed for a period of time, or the start symbol of the broadcast data map can also be related to the system bandwidth and the like. When the second data is unicast data, the mapping start symbol of the unicast data depends on the number of symbols of the PDCCH, and the mapping starts from the first symbol after the PDCCH ends.

When the first data is multicast data, the HAPS may perform non-orthogonal multiple access (NOMA) time-frequency resource mapping on the spread first data, and the same time as the second data multiplexing. The frequency resource is sent. When the first data is multicast data, when the time-frequency resource mapping is performed, the first symbol after the physical downlink control channel (PDCCH) is used as the starting mapping symbol, and the first spectrum is spread. The data is mapped to consecutive m subcarriers on the time-frequency resource that transmits the second data. When the second data is unicast data, the initial mapping symbol of the unicast data is also the first symbol after the PDCCH, that is, the first data of the spread spectrum is the same as the mapping start position of the second data.

It can be understood that the first data in the embodiment of the present application may be broadcast data or multicast data of a multimedia broadcast multicast service (MBMS), or may be machine type communications (MTC) or Communication data in the Internet of Things (IoT) communication service.

In a possible implementation, in the embodiment of the present application, when the second data and the spread first data are simultaneously transmitted on the time-frequency resource of the second data, the first data after the spread spectrum is used. The power of the second data is less than the power of the second data to reduce the impact on the transmission of the second data by transmitting the spread first data on the time-frequency resource that sends the second data.

Specifically, the power used to transmit the spread first data in the embodiment of the present application should be configured within a limited range of the set power maximum value. The maximum value of the power used by the first data after the spread of the spread data satisfies the carrier-to-interference plus noise ratio (CINR) that is used by the worst user in the cell to perform data transmission using the maximum power value. Equal to the set threshold (for example, 1dB).

Specifically, in the embodiment of the present application, the power used to transmit the spread first data and the power of the second data may be indicated by the indication information. In the embodiment of the present application, for convenience of description, the indication information indicating the power used to transmit the spread first data and the power to transmit the second data may be referred to as second indication information.

In a possible implementation, in the embodiment of the present application, a ratio between the power used to transmit the spread first data and the power of the second data may be predefined, and then the second indication information is used to indicate the transmission extension. a ratio between the power used by the frequency-first data and the power of the second data to indicate the power used to transmit the spread-first data and the power to transmit the second data.

In another possible implementation manner, in the embodiment of the present application, when the second data and the spread first data are simultaneously transmitted on the time-frequency resource that sends the second data, the first data after the spread spectrum is used. The cyclic prefix (CP) length is the same as the length of the CP transmitting the second data to avoid interference and simplify receiver processing complexity as much as possible. Specifically, the CP used for transmitting the second data and the spread first data may be an extended CP or a normal CP.

In the embodiment of the present application, the transmitting end (for example, the HAPS) spreads the first data, combines with the second data, and sends the same data on the same time-frequency resource, and the receiving end (for example, the terminal) can receive the first time-frequency resource. The second data and the first data after spreading are despread and spread the first data to obtain the first data.

Specifically, if there is no second data in the data received by the receiving end, and only the first data after the spreading is performed, the receiving end may despread the received data, and then demodulate the despread data to obtain the first data. Data to improve the signal-to-noise ratio of the received first data. If the data received by the receiving end includes the second data and the first data after the spreading, the receiving end may demodulate the second data to obtain the second data, despread the spread the first data, and then demodulate the despread data. Get the first data. The receiving end may also cancel the first data in the received data by despreading and demodulating the received data to obtain the first data, and obtain the second data by using the serial interference cancellation method.

In the embodiment of the present application, when the transmitting end is a HAPS and the receiving end is a terminal, all terminals in the HAPS coverage area can receive the second data simultaneously transmitted in the same frequency and the first data after the spreading, or the part in the HAPS coverage area. The terminal receives the second data simultaneously transmitted in the same frequency and the first data after the spread, and the remaining terminals can support receiving the data transmitted in the conventional manner. If some terminals in the HAPS coverage area support receiving the second data that is simultaneously transmitted in the same frequency and the first data after the spread in the embodiment of the present application, some terminals support receiving data transmitted in a conventional manner (for example, supporting receiving and adopting multimedia) The data transmitted by the multicast broadcast service single frequency network (MBSFN) subframe scheme can be configured to simultaneously transmit the second data and the first data after the spread, and configure the first data. Part of the subframe is an MBSFN subframe for transmitting data transmitted in a conventional manner.

The solution provided by the embodiment of the present application is mainly introduced from the perspective of interaction between the terminal and the network device. It can be understood that the terminal and the network device include corresponding hardware structures and/or software modules for performing the respective functions in order to implement the above functions. The embodiments of the present application can be implemented in a combination of hardware or hardware and computer software in combination with the elements of the examples and algorithm steps described in the embodiments disclosed in the application. Whether a function is implemented in hardware or computer software to drive hardware depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the technical solutions of the embodiments of the present application.

The embodiments of the present application may perform the division of functional units on the terminal and the network device according to the foregoing method. For example, each functional unit may be divided according to each function, or two or more functions may be integrated into one processing unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

Based on the same inventive concept, an embodiment of the present application further provides an apparatus for implementing any of the above methods, for example, providing an apparatus including a unit for implementing various steps performed by a network device in any of the above methods (or means). As another example, another apparatus is provided, including means (or means) for implementing the various steps performed by the terminal in any of the above methods.

In a possible implementation, the embodiment of the present application provides a data sending apparatus 100. Referring to FIG. 5, the data sending apparatus 100 includes a processing unit 101 and a sending unit 102. The processing unit 101 is configured to perform spreading on the first data to obtain the first data after the spreading. The sending unit 102 is configured to combine the first data obtained by the processing unit 101 and the second data to obtain the combined data, and send the combined data on the time-frequency resource.

In another possible implementation, the embodiment of the present application provides a data receiving apparatus 200. Referring to FIG. 6, the data receiving apparatus 200 includes a receiving unit 201 and a processing unit 202. The receiving unit 201 receives the second data and the spread first data on the time-frequency resource. The processing unit 202 is configured to despread the spread first data to obtain the first data.

Specifically, if there is no second data in the data received by the receiving unit 201, and only the first data after spreading, the processing unit 202 may despread the received data, and then demodulate the despread data to obtain The first data is to improve the signal to noise ratio of the received first data. If the data received by the receiving unit 201 includes the second data and the spread first data, the processing unit 202 may demodulate the second data to obtain the second data, despread and spread the first data, and then demodulate and despread. The data gets the first data. The processing unit 202 may also remove the first data in the received data by the serial interference cancellation method after despreading and demodulating the received data to obtain the first data, to obtain the second data.

The first data involved may be non-unicast data, and the non-unicast data may be, for example, broadcast service data, multicast service data, or the like. The second data can be unicast data.

The processing unit 101 may combine the spread first data and the second data by using any one of the following methods:

In the embodiment of the present application, the time-frequency resource used by the sending unit 102 to send the combined data may be a time-frequency resource that originally sends the second data. The time-frequency resource that the receiving unit receives the data may also be the time-frequency resource that originally transmitted the second data.

In a possible design, the length of the spreading sequence used by the processing unit 101 to spread the first data in the embodiment of the present application should be configured within a limited range of the maximum value and the minimum value of the length of the spreading sequence, so that The service rate of the first data transmission after the spread spectrum should meet the minimum service rate requirement, and the spread of the first data is satisfied by using the minimum length of the spread spectrum sequence to meet the coverage requirement of the first data.

In a possible implementation, the processing unit 101 in the embodiment of the present application may group the symbols available in the time unit for transmitting the first data, and use the length of the available symbols in the group to spread the first data. The length of the spreading sequence used.

In the embodiment of the present application, the length of the spreading sequence used by the processing unit 101 to spread the first data may be an exemplary length configuration range of {2, 3, 4, 5, 6, 7, 11, 12 , 13}, where the length unit can be a symbol.

In another possible implementation manner, in the embodiment of the present application, the length of the spreading sequence used by the processing unit 101 to spread the first data may be indicated by the indication information.

In another possible design, when the transmitting unit 102 simultaneously transmits the second data and the spread first data simultaneously on the time-frequency resource that sends the second data, the power used by the spread-first data is transmitted. The power of the second data is smaller than the power of the second data to reduce the impact on the transmission of the second data by transmitting the spread first data on the time-frequency resource that sends the second data.

In another possible design, the power used by the transmitting unit 102 to transmit the spread first data and the power of transmitting the second data may be indicated by the second indication information.

In another possible design, in the embodiment of the present application, when the sending unit 102 simultaneously transmits the second data and the spread first data on the time-frequency resource of the second data, the first one after the spread spectrum is transmitted. The length of the CP used by the data is the same as the length of the CP that transmits the second data, so as to avoid interference and simplify the processing complexity of receiving data. The CP used for transmitting the second data and the first data after the spreading may be an extended CP or a normalCP.

It should be understood that the division of the units in the above apparatus is only a division of logical functions, and the actual implementation may be integrated into one physical entity in whole or in part, or may be physically separated. The units in the device may all be implemented by software in the form of processing component calls; or may be implemented entirely in hardware; some units may be implemented in software in the form of processing component calls, and some units may be implemented in hardware. For example, each unit may be a separately set processing element, or may be integrated in one chip of the device, or may be stored in a memory in the form of a program, which is called by a processing element of the device and executes the unit. Features. In addition, all or part of these units can be integrated or implemented independently. The processing elements described herein can in turn be a processor and can be an integrated circuit with signal processing capabilities. In the implementation process, each step of the above method or each of the above units may be implemented by an integrated logic circuit of hardware in the processor element or by software in the form of a processing component call.

In one example, the units in any of the above devices may be one or more integrated circuits configured to implement the above methods, such as: one or more application specific integrated circuits (ASICs), or one or A plurality of digital singnal processors (DSPs), or one or more field programmable gate arrays (FPGAs), or a combination of at least two of these integrated circuit forms. As another example, when a unit in the apparatus can be implemented in the form of a processing component scheduler, the processing element can be a general purpose processor, such as a central processing unit (CPU) or other processor that can invoke the program. As another example, these units can be integrated and implemented in the form of a system-on-a-chip (SOC).

The above unit for receiving is an interface circuit of the device for receiving signals from other devices. For example, when the device is implemented in a chip, the receiving unit is an interface circuit for the chip to receive signals from other chips or devices. The above unit for transmitting is an interface circuit of the device for transmitting signals to other devices. For example, when the device is implemented in a chip, the transmitting unit is an interface circuit for transmitting signals to other chips or devices.

Please refer to FIG. 7 , which is a schematic structural diagram of a network device according to an embodiment of the present application. Used to implement the operation of the network device in the above embodiment. As shown in FIG. 7, the network device includes an antenna 111, a radio frequency device 112, and a baseband device 113. The antenna 111 is connected to the radio frequency device 112. In the uplink direction, the radio frequency device 112 receives the information transmitted by the terminal through the antenna 111, and transmits the information transmitted by the terminal to the baseband device 113 for processing. In the downlink direction, the baseband device 113 processes the information of the terminal and transmits it to the radio frequency device 112. The radio frequency device 112 processes the information of the terminal and transmits it to the terminal via the antenna 111.

Baseband device 113 may include one or more processing elements 1131, including, for example, a master CPU and other integrated circuits. In addition, the baseband device 113 may further include a storage element 1132 for storing programs and data, and an interface circuit 1133 for interacting with the radio frequency device 112, such as a common public wireless interface (common) Public radio interface, CPRI). The above device for the network device may be located in the baseband device 113. For example, the above device for the network device may be a chip on the baseband device 113, the chip including at least one processing element and interface circuit, wherein the processing element is used to execute the above network The various steps of any of the methods performed by the device, the interface circuit being used to communicate with other devices. In one implementation, the unit of the network device implementing the various steps in the above method may be implemented in the form of a processing component scheduler, for example, the apparatus for the network device includes a processing component and a storage component, and the processing component invokes a program stored by the storage component to The method performed by the network device in the above method embodiment is performed. The storage element may be a storage element on which the processing element is on the same chip, that is, an on-chip storage element, or a storage element on a different chip than the processing element, that is, an off-chip storage element.

In another implementation, the unit of the network device implementing the various steps in the above method may be configured as one or more processing elements, and the processing elements are disposed on the baseband device, where the processing element may be an integrated circuit, for example: Or a plurality of ASICs, or one or more DSPs, or one or more FPGAs, or a combination of these types of integrated circuits. These integrated circuits can be integrated to form a chip.

The units of the network device implementing the various steps in the above method may be integrated and implemented in the form of a system-on-a-chip (SOC), for example, the baseband device includes the SOC chip for implementing the above method. At least one processing component and a storage component may be integrated in the chip, and the method executed by the above network device may be implemented in the form of a stored procedure in which the processing component invokes the storage component; or, at least one integrated circuit may be integrated in the chip to implement the above network. The method performed by the device; or, in combination with the above implementation manner, the functions of some units are implemented by the processing component calling program, and the functions of some units are implemented by the form of an integrated circuit.

It can be seen that the above device for the network device can include at least one processing element and interface circuit, wherein at least one processing element is used to perform the method performed by any of the network devices provided by the above method embodiments. The processing element may perform some or all of the steps performed by the network device in a first manner: by calling a program stored by the storage element; or in a second manner: by combining the instructions through hardware integrated logic in the processor element The method performs some or all of the steps performed by the network device; of course, some or all of the steps performed by the above network device may also be performed in combination with the first mode and the second mode.

The processing elements herein, as described above, may be general purpose processors, such as a CPU, or may be one or more integrated circuits configured to implement the above methods, such as one or more ASICs, or one or more microprocessors. The DSP, or one or more FPGAs, etc., or a combination of at least two of these integrated circuit forms.

The storage element can be a memory or a collective name for a plurality of storage elements.

Please refer to FIG. 8 , which is a schematic structural diagram of a terminal according to an embodiment of the present application. It can be the terminal in the above embodiment, and is used to implement the operation of the terminal in the above embodiment. As shown in FIG. 8, the terminal includes an antenna 210, a radio frequency device 220, and a signal processing device 230. The antenna 210 is connected to the radio frequency device 220. In the downlink direction, the radio frequency device 220 receives the information transmitted by the network device through the antenna 210, and transmits the information sent by the network device to the signal processing device 230 for processing. In the uplink direction, the signal processing device 230 processes the information of the terminal and sends the information to the radio frequency device 220. The radio frequency device 220 processes the information of the terminal and sends the information to the network device via the antenna 210.

The signal processing device 230 may include a modem subsystem for implementing processing of each communication protocol layer of data; and may further include a central processing subsystem for implementing processing on the terminal operating system and the application layer; Other subsystems, such as multimedia subsystems, peripheral subsystems, etc., in which the multimedia subsystem is used to implement control of the terminal camera, screen display, etc., and the peripheral subsystem is used to implement connection with other devices. The modem subsystem can be a separately set chip. Optionally, the above device for the terminal may be located in the modem subsystem.

The modem subsystem may include one or more processing elements 231, including, for example, a master CPU and other integrated circuits. In addition, the modem subsystem may also include a storage element 232 and an interface circuit 233. The storage element 232 is used to store data and programs, but the program for performing the method performed by the terminal in the above method may not be stored in the storage element 232, but stored in a memory other than the modem subsystem, using The modem demodulation subsystem is loaded for use. Interface circuit 233 is used to communicate with other subsystems. The above device for the terminal may be located in a modem subsystem, which may be implemented by a chip, the chip comprising at least one processing element and interface circuit, wherein the processing element is used to perform any of the above methods of terminal execution In various steps, the interface circuit is used to communicate with other devices. In one implementation, the means for the terminal to implement the various steps in the above method may be implemented in the form of a processing component scheduler, for example, the device for the terminal includes a processing component and a storage component, and the processing component invokes a program stored by the storage component to perform the above Method performed by a terminal in a method embodiment. The storage element can be a storage element on which the processing element is on the same chip, ie an on-chip storage element.

In another implementation, the program for performing the method performed by the terminal in the above method may be on a different storage element than the processing element, ie, an off-chip storage element. At this time, the processing element calls or loads the program from the off-chip storage element on the on-chip storage element to invoke and execute the method performed by the terminal in the above method embodiment.

In yet another implementation, the unit that implements the various steps in the above method may be configured as one or more processing elements disposed on a modem subsystem, where the processing elements may be integrated circuits, such as : One or more ASICs, or one or more DSPs, or one or more FPGAs, or a combination of these types of integrated circuits. These integrated circuits can be integrated to form a chip.

The unit that implements each step in the above method may be integrated and implemented in the form of a system-on-a-chip (SOC) for implementing the above method. At least one processing element and a storage element may be integrated in the chip, and the method executed by the terminal is implemented by the processing element calling the stored program of the storage element; or at least one integrated circuit may be integrated in the chip for implementing the above terminal Alternatively, in combination with the above implementation manner, the functions of some units are implemented by processing the component calling program, and the functions of some units are implemented by the form of an integrated circuit.

It can be seen that the above device for the terminal can include at least one processing element and interface circuit, wherein at least one processing element is used to execute the method performed by any of the terminals provided by the above method embodiments. The processing element may perform some or all of the steps performed by the terminal in a manner of calling the program stored by the storage element; or in a second manner: by combining the logic of the hardware in the processor element with the instruction The method performs some or all of the steps performed by the terminal; of course, some or all of the steps performed by the terminal may also be performed in combination with the first mode and the second mode.

According to the method provided by the embodiment of the present application, the embodiment of the present application further provides a communication system, including the foregoing network device and one or more terminals.

The embodiment of the present application further provides a data sending apparatus, which is applied to a network device, and includes at least one processing element (or chip) for executing the foregoing method embodiments.

The present application provides a data transmitting program for executing the data transmitting method of the above embodiment when executed by a processor.

The present application also provides a program product, such as a computer readable storage medium, including the program of the data transmission method described above.

The embodiment of the present application further provides a data receiving apparatus, which is applied to a terminal, and includes at least one processing element (or chip) for performing the foregoing method embodiments.

The present application provides a data receiving program for executing the data receiving method of the above embodiment when executed by a processor.

The present application also provides a program product, such as a computer readable storage medium, including the program of the data receiving method described above.

Embodiments of the present application are described with reference to flowchart illustrations and/or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Claims

A data transmitting method, characterized in that the method comprises:

Spreading the first data to obtain the first data after the spreading;

Combining the spread first data with the second data to obtain merged data;

The combined data is sent on a time-frequency resource.
The method of claim 1, wherein the first data is non-unicast data and the second data is unicast data.
The method according to claim 1 or 2, wherein the length of the spreading sequence used for spreading the first data is a group obtained by grouping the symbols available in the time unit in which the first data is transmitted. The length of the symbols available within.
The method according to claim 3, wherein the length of the spreading sequence used for spreading the first data is indicated by the first indication information;

The first indication information indicates a number of groups obtained by grouping symbols available in a time unit in which the first data is transmitted, and a length of symbols available in each group.
The method according to claim 4, wherein the first data is broadcast data, and the first indication information is system information; or

The first data is multicast data, and the first indication information is downlink control information DCI.
The method according to claim 5, wherein the first indication information is system information, and the system information comprises an on-demand system message OSI.
The method according to any one of claims 1 to 6, wherein the power used to transmit the spread first data is smaller than the power to transmit the second data.
The method according to claim 7, wherein the power used to transmit the spread first data and the power to transmit the second data are indicated by the second indication information.
The method according to claim 8, wherein the second indication information is used to indicate a ratio between a power used to transmit the spread first data and a power to transmit the second data.
The method according to any one of claims 8 to 9, wherein the second indication message is a system message.
The method of claim 10 wherein said system message comprises an on-demand system message OSI.
The method according to any one of claims 1 to 11, wherein the first data transmitted by the spread spectrum adopts a cyclic prefix length that is the same as a cyclic prefix length for transmitting the second data.
A data transmitting device, comprising:

a processing unit, configured to perform spreading on the first data to obtain the first data after the spreading;

And a sending unit, configured to combine the first data obtained by the spreading processing of the processing unit with the second data to obtain merged data, and send the merged data on a time-frequency resource.
The apparatus according to claim 13, wherein said first data is non-unicast data and said second data is unicast data.
The apparatus according to claim 13 or 14, wherein the length of the spreading sequence used for spreading the first data is a group obtained by grouping symbols available in a time unit for transmitting the first data. The length of the symbols available within.
The apparatus according to claim 15, wherein the length of the spreading sequence used for spreading the first data is indicated by the first indication information;

The first indication information indicates a number of groups obtained by grouping symbols available in a time unit in which the first data is transmitted, and a length of symbols available in each group.
The apparatus according to claim 16, wherein the first data is broadcast data, and the first indication information is system information; or

The first data is multicast data, and the first indication information is downlink control information DCI.
The apparatus according to claim 17, wherein said first indication information is system information, and said system information comprises an on-demand system message OSI.
The apparatus according to any one of claims 13 to 18, characterized in that the power used to transmit the spread first data is smaller than the power to transmit the second data.
The apparatus according to claim 19, wherein the power used to transmit the spread first data and the power to transmit the second data are indicated by the second indication information.
The apparatus according to claim 20, wherein the second indication information is used to indicate a ratio between a power used to transmit the spread first data and a power to transmit the second data.
The apparatus according to any one of claims 20 to 21, wherein the second indication message is a system message.
The apparatus of claim 22 wherein said system message comprises an on-demand system message OSI.
The apparatus according to any one of claims 13 to 23, characterized in that the first data transmitted by the spread spectrum adopts a cyclic prefix length which is the same as a cyclic prefix length for transmitting the second data.
A data transmitting apparatus comprising at least one processor and an interface circuit, wherein the at least one processor is operative to perform the method of any one of claims 1 to 12.
A network device comprising the data transmitting apparatus according to any one of claims 13 to 24.
A storage medium characterized by comprising a program for executing the method according to any one of claims 1 to 12 when executed by a processor.