CN107409108B

CN107409108B - Method for cooperative decoding, base station and user equipment

Info

Publication number: CN107409108B
Application number: CN201580077452.2A
Authority: CN
Inventors: 卢磊; 杨辉联; 王磊
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2015-03-09
Filing date: 2015-03-09
Publication date: 2020-02-14
Anticipated expiration: 2035-03-09
Also published as: WO2016141540A1; CN107409108A

Abstract

The invention provides a cooperative decoding method, a base station and user equipment. The method comprises the following steps: the method comprises the steps that first user equipment acquires decoding information of second user equipment and first data to be decoded in data to be decoded of the second user equipment, wherein the first user equipment is one of at least one user equipment which cooperates with the second user equipment to decode the data to be decoded, and the first user equipment and the second user equipment are communicated with a base station in a non-orthogonal multiple access mode; the first user equipment decodes the first data to be decoded according to the decoding information to obtain first decoded data; the first user equipment sends the first decoding data to the second user equipment. The technical scheme of the invention improves the decoding capability of the user equipment and simultaneously enables the user equipment for cooperative decoding to be reasonably and effectively utilized.

Description

Method for cooperative decoding, base station and user equipment

Technical Field

The embodiment of the invention relates to the technical field of mobile communication, in particular to a cooperative decoding method, a base station and user equipment.

Background

Currently, a plurality of multiple access methods, including orthogonal multiple access and non-orthogonal multiple access, have been proposed. Orthogonal multiple access includes, for example, time division multiple access, frequency division multiple access, and code division multiple access, non-orthogonal multiple access, which may improve the throughput of the communication system. In non-orthogonal multiple access techniques, the same resource (e.g., time-frequency resource) may be allocated to multiple users. The non-orthogonal multiple access technology superposes M (M is an integer not less than 1) data streams from one or more users on N (N is an integer not less than 1) subcarriers for transmission, wherein each data of each data stream can be spread on the N subcarriers by means of sparse spreading.

The non-orthogonal multiple access technology has the problem of high decoding complexity while bringing gain. However, the user equipment is limited in size/dimension, etc., and cannot reach the calculation capability of the base station side.

Therefore, how to improve the processing capability of the ue in the non-orthogonal multiple access scenario is an urgent problem to be solved.

Disclosure of Invention

The invention provides a cooperative decoding method, a base station and user equipment, which can improve the processing capacity of a terminal in a non-orthogonal multiple access scene.

In one aspect, a decoding method based on terminal cooperation is provided, including: the method comprises the steps that first user equipment acquires decoding information of second user equipment and first data to be decoded in the data to be decoded of the second user equipment, wherein the decoding information is used for decoding the first data to be decoded, the first user equipment is one of at least one user equipment which cooperates the second user equipment to decode the data to be decoded, and the first user equipment and the second user equipment are communicated with a base station in a non-orthogonal multiple access mode; the first user equipment decodes the first data to be decoded according to the decoding information to obtain first decoded data; the first user equipment sends the first decoding data to the second user equipment.

In a first possible implementation manner, the acquiring, by a first user equipment, decoding information of a second user equipment, and acquiring first data to be decoded in data to be decoded of the second user equipment includes: the first user equipment acquires the decoding information sent by the base station and acquires first data to be decoded sent by the second user equipment.

With reference to the first aspect, in a second possible implementation manner, the method of the first aspect further includes: the method comprises the steps that first user equipment receives a first message sent by a base station, wherein the first message is used for informing the first user equipment of reporting the information of the capability of cooperative decoding; the first user equipment reports the information of the capability of cooperative decoding to the base station, so that the base station determines a cooperation set according to the information of the capability of cooperative decoding, wherein the cooperation set comprises at least one user equipment, and the step of acquiring the decoding information sent by the base station by the first user equipment comprises the following steps: the first user equipment receives decoding information of the user equipment in the cooperative set broadcasted or multicasted by the base station.

With reference to the first aspect, in a third possible implementation manner, the acquiring, by the first user equipment, the decoding information of the second user equipment, and acquiring the first data to be decoded in the data to be decoded of the second user equipment includes: the first user equipment acquires decoding information sent by the second user equipment; the first user equipment acquires first data to be decoded sent by the second user equipment.

With reference to the first aspect, in a fourth possible implementation manner, the multiplexing, by the first user equipment, the same time-frequency resource with the second user equipment, where the first user equipment obtains decoding information of the second user equipment, and obtains first data to be decoded in data to be decoded of the second user equipment, includes: the first user equipment acquires decoding information sent by the second user equipment; the method comprises the steps that first user equipment obtains time-frequency resource position information of first data to be decoded, which is sent by second user equipment; and the first user equipment acquires the first data to be decoded sent by the base station according to the time-frequency resource position information.

With reference to the third or fourth possible implementation manner, in a fifth possible implementation manner, the acquiring, by the first user equipment, the decoding information sent by the second user equipment includes: the first user equipment receives a second message sent by the second user equipment, and is used for requesting the first user equipment to cooperate with the second user equipment to perform decoding, wherein the second message carries decoding information and the size of first data to be decoded, and the decoding method further comprises the following steps: the first user equipment determines the cooperative second user equipment to decode according to the size of the first data to be decoded; and the first user equipment sends a third message to the second user equipment for confirming that the second user equipment is cooperated for decoding.

With reference to the fifth possible implementation manner, in a sixth possible implementation manner, before the first user equipment receives the second message sent by the second user equipment, the decoding method further includes: the first user equipment receives a fourth message sent by the second user equipment, wherein the fourth message is used for informing the first user equipment of reporting the information of the capability of cooperative decoding; the first user equipment reports the information of the capability of cooperative decoding to the first user equipment, so that the second user equipment determines that the first user equipment cooperates with the second user equipment to decode according to the information of the capability of cooperative decoding.

With reference to any one of the foregoing possible implementation manners, in a seventh possible implementation manner, the decoding information is a codebook used by the first data to be decoded, and when the first data to be decoded is transmitted between the first user equipment and the base station, the first data to be decoded multiplexes the same time-frequency resources with at least one data stream based on the codebook.

With reference to any one of the foregoing possible implementation manners, in an eighth possible implementation manner, the decoding information includes a power allocation factor adopted by the first to-be-decoded data, and when the first to-be-decoded data is transmitted between the first user equipment and the base station, the first to-be-decoded data multiplexes the same time-frequency resource with at least one data stream based on the power allocation factor.

With reference to any one of the foregoing possible implementation manners, in a ninth possible implementation manner, the decoding information is information of a signature matrix, where the signature matrix is used to generate a precoding matrix, and the precoding matrix is used to enable Multiple Input Multiple Output (MIMO) transmission of data to be decoded between multiple transmit antennas of the base station and multiple receive antennas formed by antennas of the second user equipment and the at least one user equipment.

In a second aspect, a decoding method based on terminal cooperation is provided, including: the method comprises the steps that a second user device receives first decoding data sent by the first user device, wherein the first user device is one of at least one user device which is cooperated with the second user device to decode data to be decoded, the first decoding data is obtained by decoding the first data to be decoded in the data to be decoded of the second user device by the first user device according to decoding information of the second user device, the first user device and the second user device communicate with a base station in a non-orthogonal multiple access mode, and the decoding information is used for decoding the first data to be decoded; and the second user equipment obtains decoding data corresponding to the data to be decoded according to the first decoding data.

With reference to the second aspect, in a first possible implementation manner, the method of the second aspect further includes: and the second user equipment sends the first data to be decoded to the first user equipment.

With reference to the second aspect, in a second possible implementation manner, the method of the second aspect further includes: before the second user equipment sends the first data to be decoded to the first user equipment, the second user equipment receives a third message sent by the base station, wherein the third message is used for indicating a cooperation set, and the cooperation set comprises at least one user equipment; and the second user equipment determines that the first user equipment cooperates with the second user equipment to decode according to the third message.

With reference to the second aspect, in a third possible implementation manner, the method of the second aspect further includes: the second user equipment sends decoding information to the first user equipment; and the second user equipment sends the first data to be decoded to the first user equipment.

With reference to the second aspect, in a fourth possible implementation manner, the first user equipment and the second user equipment multiplex the same time-frequency resource, and the method of the second aspect further includes: the second user equipment sends decoding information to the first user equipment; and the second user equipment sends the time-frequency resource position information of the first data to be decoded to the first user equipment.

In a fifth possible implementation manner, the sending, by the second user equipment, the decoding information to the first user equipment includes: the second user equipment sends a second message to the first user equipment, the second message being used for requesting the first user equipment to cooperate with the second user equipment to perform decoding, wherein the second message carries decoding information and the size of the first data to be decoded, and the method in the second aspect further comprises: and the second user equipment receives a third message sent by the first user equipment, wherein the third message is used for confirming that the second user equipment is cooperated to decode.

In a fifth possible implementation manner of the second aspect, in a sixth possible implementation manner, the method of the second aspect further includes: before the second user equipment sends a second message to the first user equipment, the second user equipment sends a fourth message to the first user equipment, and the fourth message is used for informing the first user equipment of reporting the information of the capability of the cooperative decoding; the second user equipment receives the information of the capability of cooperative decoding reported by the first user equipment; and the second user equipment determines that the first user equipment cooperates with the second user equipment for decoding according to the information of the capability of cooperative decoding.

With reference to any one of the foregoing possible implementation manners of the second aspect, in a seventh possible implementation manner, the decoding information is a codebook used by the first data to be decoded, and when the first data to be decoded is transmitted between the first user equipment and the base station, the first data to be decoded multiplexes the same time-frequency resources with at least one data stream based on the codebook.

With reference to any one of the foregoing possible implementation manners of the second aspect, in an eighth possible implementation manner, the decoding information includes a power allocation factor adopted by the first data to be decoded, and when the first data to be decoded is transmitted between the first user equipment and the base station, the first data to be decoded multiplexes the same time-frequency resources with the at least one data stream based on the power allocation factor.

With reference to any one of the foregoing possible implementation manners of the second aspect, in a ninth possible implementation manner, the decoding information is information of a signature matrix, where the signature matrix is used to generate a precoding matrix, and the precoding matrix is used to enable multiple-input multiple-output MIMO transmission of data to be decoded between multiple transmit antennas of the base station and multiple receive antennas formed by antennas of the second user equipment and the at least one user equipment.

In a third aspect, a decoding method based on terminal cooperation is provided, including: the base station sends a first message to at least one first user equipment, wherein the first message is used for informing the at least one first user equipment of the information of the capability of reporting the cooperative decoding; the base station receives information of the capability of cooperative decoding reported by at least one first user equipment; the base station decodes the decoding information of at least one piece of broadcast or multicast user equipment according to the information of the cooperative decoding capability reported by the first user equipment, so that the at least one piece of first user equipment can decode the data to be decoded according to the decoding information of the second user equipment; and the base station sends a third message to the second user equipment, wherein the third message is used for indicating a cooperation set, and the cooperation set information comprises at least one user equipment.

With reference to the third aspect, in a first possible implementation manner, the decoding information is a codebook used by the first data to be decoded, and when the first data to be decoded is transmitted between the first user equipment and the base station, the first data to be decoded multiplexes the same time-frequency resources with at least one data stream based on the codebook.

With reference to the third aspect, in a second possible implementation manner, the decoding information includes a power allocation factor adopted by the first data to be decoded, and when the first data to be decoded is transmitted between the first user equipment and the base station, the first data to be decoded multiplexes the same time-frequency resources with the at least one data stream based on the power allocation factor.

With reference to the third aspect, in a third possible implementation manner, the decoding information is information of a signature matrix, the signature matrix is used to generate a precoding matrix, and the precoding matrix is used to enable the data to be decoded to implement MIMO transmission between multiple transmit antennas of the base station and multiple receive antennas formed by antennas of the second user equipment and the at least one user equipment.

In a fourth aspect, a user equipment is provided, including: the acquisition module is used for acquiring decoding information of second user equipment and acquiring first data to be decoded in the data to be decoded of the second user equipment, wherein the decoding information is used for decoding the first data to be decoded, the user equipment is one of at least one user equipment which cooperates the second user equipment to decode the data to be decoded, and the user equipment and the second user equipment are communicated with a base station in a non-orthogonal multiple access mode; the decoding module is used for decoding the first data to be decoded according to the decoding information to obtain first decoded data; and the sending module is used for sending the first decoding data to the second user equipment.

With reference to the fourth aspect, in a first possible implementation manner, the obtaining module obtains the decoding information sent by the base station, and obtains the first to-be-decoded data sent by the second user equipment.

With reference to the fourth aspect, in a second possible implementation manner, the obtaining module further receives a first message sent by the base station, where the first message is used to notify the ue of information of capability of reporting cooperative decoding; the sending module is further configured to determine a cooperation set according to the information of the capability of cooperative decoding, where the cooperation set includes at least one user equipment, and the obtaining module receives decoding information of the user equipment in the cooperation set broadcasted or multicasted by the base station.

With reference to the fourth aspect, in a third possible implementation manner, the obtaining module obtains the decoding information sent by the second user equipment, and obtains the first to-be-decoded data sent by the second user equipment.

With reference to the fourth aspect, in a fourth possible implementation manner, the ue and the second ue multiplex the same time-frequency resource, the obtaining module obtains the decoding information sent by the second ue, obtains the time-frequency resource location information of the first to-be-decoded data sent by the second ue, and the ue obtains the first to-be-decoded data sent by the base station according to the time-frequency resource location information.

With reference to the third or fourth possible implementation manner of the fourth aspect, in a fifth possible implementation manner, the obtaining module receives a second message sent by a second user equipment, and is configured to request the user equipment to cooperate with the second user equipment to perform decoding, where the second message carries decoding information and a size of first data to be decoded, and the user equipment further includes: and the determining module is used for determining the second user equipment in cooperation for decoding according to the size of the first data to be decoded, and the sending module is also used for sending a third message to the second user equipment for confirming the second user equipment in cooperation for decoding.

With reference to the fifth possible implementation manner of the fourth aspect, in a sixth possible implementation manner, the obtaining module further receives a fourth message sent by the second user equipment before receiving the second message sent by the second user equipment, where the fourth message is used to notify the user equipment of information of capability of reporting cooperative decoding, and the sending module is further used to report the information of capability of reporting cooperative decoding to the user equipment, so that the second user equipment determines that the user equipment cooperates with the second user equipment to perform decoding according to the information of capability of cooperative decoding.

With reference to any one of the foregoing possible implementation manners of the fourth aspect, in a seventh possible implementation manner, the decoding information is that a codebook is used for the first data to be decoded, and when the first data to be decoded is transmitted between the user equipment and the base station, the first data to be decoded multiplexes the same time-frequency resources with at least one data stream based on the codebook.

With reference to any one of the foregoing possible implementation manners of the fourth aspect, in an eighth possible implementation manner, the decoding information includes a power allocation factor adopted by the first data to be decoded, and when the first data to be decoded is transmitted between the user equipment and the base station, the first data to be decoded multiplexes the same time-frequency resources with the at least one data stream based on the power allocation factor.

In a fifth aspect, a user equipment is provided, including: the receiving module is used for receiving first decoding data sent by user equipment, wherein the first user equipment is one of at least one user equipment which cooperates with the user equipment to decode the data to be decoded, the first decoding data is obtained by decoding first data to be decoded in the data to be decoded of the user equipment by the first user equipment according to decoding information of the user equipment, the first user equipment and the user equipment adopt a non-orthogonal multiple access mode to communicate with a base station, and the decoding information is used for decoding the first data to be decoded; and the decoding module is used for obtaining decoding data corresponding to the data to be decoded according to the first decoding data.

With reference to the fifth aspect, in a first possible implementation manner, the user equipment of the fifth aspect further includes: and the sending module is used for sending the first data to be decoded to the first user equipment.

With reference to the fifth aspect, in a second possible implementation manner, before the ue sends the first data to be decoded to the first ue, the receiving module further receives a third message sent by the base station, where the third message is used to indicate a cooperation set, and the cooperation set includes at least one ue, where the ue further includes: and the determining module is used for determining the first user equipment to cooperate with the user equipment to decode according to the third message.

With reference to the fifth aspect, in a third possible implementation manner, the user equipment of the fifth aspect further includes: and the sending module is used for sending the decoding information to the first user equipment and sending the first data to be decoded to the first user equipment.

With reference to the fifth aspect, in a fourth possible implementation manner, the first user equipment and the user equipment multiplex the same time-frequency resource, and the user equipment further includes: and the sending module is used for sending the decoding information to the first user equipment and sending the time-frequency resource position information of the first data to be decoded to the first user equipment.

In a fifth possible implementation manner, the sending module sends a second message to the first user equipment, where the second message is used to request the first user equipment to cooperate with the user equipment for decoding, and the second message carries decoding information and the size of the first data to be decoded, where the receiving module further receives a third message sent by the first user equipment, and the third message is used to confirm that the cooperating user equipment performs decoding.

In a fifth possible implementation manner of the fifth aspect, in a sixth possible implementation manner, the sending module further sends, to the first user equipment, a fourth message before the user equipment sends the second message to the first user equipment, where the fourth message is used to notify the first user equipment of information of capability of reporting cooperative decoding, and the receiving module further receives the information of capability of reporting cooperative decoding, where the user equipment further includes: and the determining module is used for determining the first user equipment to cooperate with the user equipment for decoding according to the information of the capability of cooperative decoding.

With reference to any one of the foregoing possible implementation manners of the fifth aspect, in a seventh possible implementation manner, the decoding information is that the first data to be decoded uses a codebook, and when the first data to be decoded is transmitted between the user equipment and the base station, the first data to be decoded multiplexes the same time-frequency resources with at least one data stream based on the codebook.

With reference to any one of the foregoing possible implementation manners of the fifth aspect, in an eighth possible implementation manner, the decoding information includes a power allocation factor adopted by the first data to be decoded, and when the first data to be decoded is transmitted between the user equipment and the base station, the first data to be decoded multiplexes the same time-frequency resources with the at least one data stream based on the power allocation factor.

With reference to any one of the foregoing possible implementation manners of the fifth aspect, in a ninth possible implementation manner, the decoding information is information of a signature matrix, where the signature matrix is used to generate a precoding matrix, and the precoding matrix is used to enable multiple-input multiple-output MIMO transmission of data to be decoded between multiple transmit antennas of the base station and multiple receive antennas formed by the user equipment and the antenna of the at least one user equipment.

In a sixth aspect, there is provided a base station comprising: the sending module is used for sending a first message to the at least one first user equipment, wherein the first message is used for informing the at least one first user equipment of the information of the capability of reporting the cooperative decoding; a receiving module, configured to receive information of capability of cooperative decoding reported by at least one first user equipment; the sending module is used for sending decoding information to at least one user device which is broadcasted or multicasted according to the information of the cooperative decoding capability reported by the first user device, so that the at least one first user device can decode data to be decoded according to the decoding information of the second user device and send a third message to the second user device, wherein the third message is used for indicating a cooperative set, and the cooperative set information comprises the at least one user device.

With reference to the sixth aspect, in a first possible implementation manner, the decoding information is a codebook used by the first data to be decoded, and when the first data to be decoded is transmitted between the user equipment and the base station, the first data to be decoded multiplexes the same time-frequency resources with at least one data stream based on the codebook.

With reference to the sixth aspect, in a second possible implementation manner, the decoding information includes a power allocation factor adopted by the first data to be decoded, and when the first data to be decoded is transmitted between the user equipment and the base station, the first data to be decoded multiplexes the same time-frequency resources with the at least one data stream based on the power allocation factor.

With reference to the sixth aspect, in a third possible implementation manner, the decoding information is information of a signature matrix, where the signature matrix is used to generate a precoding matrix, and the precoding matrix is used to enable the data to be decoded to implement MIMO transmission between multiple transmit antennas of the base station and multiple receive antennas formed by antennas of the second user equipment and the at least one user equipment.

According to the embodiment of the invention, the first user equipment can acquire a part of data to be decoded of the second user equipment and the decoding information of the part of data to be decoded, decode the part of data to be decoded according to the decoding information, and send the decoding result to the second user equipment, thereby realizing cooperative decoding. Because the first user equipment shares part of decoding work of the second user equipment, the capacity of the second user equipment for processing data to be decoded is improved, and the first user equipment is reasonably and effectively utilized.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a schematic configuration diagram of a communication system according to an embodiment of the present invention.

FIG. 2 is a schematic flow diagram of a method of cooperative coding according to one embodiment of the present invention.

FIG. 3 is a schematic flow diagram of a method of cooperative coding according to another embodiment of the present invention.

FIG. 4 is a schematic flow diagram of a method of cooperative coding according to another embodiment of the present disclosure.

FIG. 5 is a schematic flow diagram of a process of cooperative coding according to another embodiment of this disclosure.

FIG. 6 is a schematic flow diagram of a process of cooperative coding according to another embodiment of this disclosure.

Figure 7 is a schematic diagram of the encoding principle of SCMA.

FIG. 8 is a schematic flow diagram of a process of cooperative coding according to another embodiment of this disclosure.

FIG. 9 is a schematic diagram of a process of cooperative coding according to another embodiment of the invention.

Fig. 10 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.

Fig. 11 is a schematic structural diagram of a user equipment according to another embodiment of the present invention.

Fig. 12 is a schematic structural diagram of a base station according to an embodiment of the present invention.

Fig. 13 is a schematic structural diagram of a user equipment according to another embodiment of the present invention.

Fig. 14 is a schematic structural diagram of a user equipment according to another embodiment of the present invention.

Fig. 15 is a schematic structural diagram of a base station according to another embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.

Various embodiments are now described with reference to the drawings, wherein like reference numerals are used to refer to like elements throughout. In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that the embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.

As used in this specification, the terms "component," "module," "system," and the like are intended to refer to a computer-related entity, either hardware, firmware, a combination of hardware and software, or software in execution. For example, a component may be, but is not limited to being, a process running on a processor, an object, an executable, a thread of execution, a program, and/or a computer. By way of illustration, both an application running on a computing device and the computing device can be a component. One or more components can reside within a process and/or thread of execution and a component can be localized on one computer and/or distributed between 2 or more computers. In addition, these components can execute from various computer readable media having various data structures stored thereon. The components may communicate by way of local and/or remote processes such as in accordance with a signal having one or more data packets (e.g., data from two components interacting with another component in a local system, distributed system, and/or across a network such as the internet with other systems by way of the signal).

Moreover, various embodiments are described herein in connection with an access terminal. An access terminal can also be called a system, subscriber unit, subscriber station, mobile, remote station, remote terminal, mobile device, User terminal, wireless communication device, User agent, User device, or UE (User Equipment). An access terminal may be a cellular telephone, a cordless telephone, a SIP (Session Initiation Protocol) phone, a WLL (Wireless Local Loop) station, a PDA (Personal Digital Assistant), a handheld device having Wireless communication capabilities, a computing device, or other processing device connected to a Wireless modem. Furthermore, various embodiments are described herein in connection with a base station. The Base Station may be a Base Transceiver Station (BTS) in GSM (Global System for mobile communications) or CDMA (Code Division Multiple Access), or an NB (NodeB, Base Station) in WCDMA (Wideband Code Division Multiple Access), or an eNB or eNodeB (evolved Node B) in LTE (Long term evolution), or a relay Station or Access point, or a Base Station device in a future 5G network.

Moreover, various aspects or features of the invention may be implemented as a method, apparatus, or article of manufacture using standard programming and/or engineering techniques. The term "article of manufacture" as used herein is intended to encompass a computer program accessible from any computer-readable device, carrier, or media. For example, computer-readable media may include, but are not limited to: magnetic storage devices (e.g., hard Disk, floppy Disk, magnetic tape, etc.), optical disks (e.g., CD (Compact Disk), DVD (Digital Versatile Disk), etc.), smart cards, and flash Memory devices (e.g., EPROM (Erasable Programmable Read-Only Memory), card, stick, key drive, etc.). In addition, various storage media described herein can represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" can include, without being limited to, wireless channels and various other media capable of storing, containing, and/or carrying instruction(s) and/or data.

The basic idea of the terminal cooperation technology is that each mobile terminal in the system is provided with one or more cooperation partners, and the cooperation partners help the cooperation partners to transmit information while transmitting the information, so that each terminal utilizes the own channel and the channels of the cooperation partners in the information transmission process, and a certain space diversity gain is obtained. In a cooperative communication network, a source node can directly transmit information through a path between the source node and a destination node, and a virtual antenna array can be formed together with an antenna on a relay node by utilizing cooperative diversity. Thus, each antenna transmits the signal of the source node to the destination node, and the virtual antenna array can be regarded as a virtual MIMO structure.

The embodiment of the invention utilizes the terminal cooperation technology to enhance the processing capability of the terminal in the non-orthogonal multiple access scene.

Referring to fig. 1, a wireless communication system 100 is illustrated in accordance with various embodiments herein. The wireless communication system 100 includes a base station 102, and the base station 102 can include multiple antenna groups. Each antenna group can include one or more antennas, e.g., one antenna group can include

antennas

104 and 106, another antenna group can include

antennas

108 and 110, and an additional group can include

antennas

112 and 114. 2 antennas are shown in fig. 1 for each antenna group, however, more or fewer antennas may be utilized for each group. Base station 102 may additionally include a transmitter and a receiver, each of which may include various components associated with signal transmission and reception (e.g., processors, modulators, multiplexers, demodulators, demultiplexers, antennas, etc.), as will be appreciated by one skilled in the art.

Base station 102 may communicate with one or more access terminals, such as access terminal 116 and access terminal 122. However, it can be appreciated that base station 102 can communicate with any number of access terminals similar to

access terminals

116 or 122. The

access terminals

116 and 122 can be, for example, cellular phones, smart phones, laptops, handheld communication devices, handheld computing devices, satellite radios, global positioning systems, PDAs, and/or any other suitable device for communicating over the wireless communication system 100. As depicted, access terminal 116 is in communication with

antennas

112 and 114, where

antennas

112 and 114 transmit information to access terminal 116 over forward link 118 and receive information from access terminal 116 over reverse link 120. In addition, access terminal 122 is in communication with

antennas

104 and 106, where

antennas

104 and 106 transmit information to access terminal 122 over forward link 124 and receive information from access terminal 122 over reverse link 126.

Base station 102, access terminal 116, or access terminal 122 can be a wireless communication transmitting device and/or a wireless communication receiving device. When sending data, the wireless communication sending device may encode the data for transmission. Specifically, the wireless communication transmitting device may obtain (e.g., generate, receive from other communication devices, or save in memory, etc.) a number of data bits to be transmitted over the channel to the wireless communication receiving device. Such data bits may be contained in a transport block (or transport blocks) of data, which may be segmented to produce multiple code blocks.

According to the embodiment of the invention, the base station and the plurality of UEs can communicate through air interfaces by adopting a non-orthogonal multiple access technology, and the plurality of UEs can communicate by adopting a D2D mode. Multiple UEs may multiplex the same time-frequency resource when communicating with the base station.

It should be understood that the non-orthogonal multiple access technology in the embodiment of the present invention may be an SCMA technology that multiplexes the same time-frequency resource in a code division manner, or may also be an NOMA technology that multiplexes the same time-frequency resource in a power multiplexing manner, which is not limited in the embodiment of the present invention, and may also be other non-orthogonal multiple access technologies.

Specifically, SCMA is a non-orthogonal multiple access technology, which may not be referred to as SCMA by those skilled in the art, but may be referred to by other names. According to the technology, a plurality of different data streams are transmitted on the same transmission resource by means of codebooks, wherein the codebooks used by the different data streams are different, and therefore the utilization rate of the resource is improved. The data streams may be from the same terminal device or from different terminal devices. In the SCMA system, the time-frequency Resource may be divided into a plurality of orthogonal time-frequency Resource blocks, and each time-frequency Resource block contains L REs (Resource elements). When a sending end k sends data, the data to be sent is firstly divided into data blocks with the size of S bits, and a codebook C is searched_kMapping each data block into a set of modulation symbols X_k＝{X_k1，X_k2，...，X_kLAnd each modulation symbol corresponds to one RE in the resource block. When the receiving end decodes, the receiving end can decode according to the codebook C_kMPA (Message publishing Algorithm, Messaging Algorithm) is performed on data) And iterating to obtain the data sent by the sending end. The non-orthogonal air interface access allows a plurality of code words to be transmitted in a superposition mode on one system resource block.

In particular, NOMA is a non-orthogonal multiple access technique, although those skilled in the art may refer to this technique without NOMA, or by other names. In the NOMA system, SIC (Serial Interference Cancellation) is required at the receiving end in order to decode non-orthogonal data. The SIC can distinguish the signals of different users at the receiving end. The basic principle of SIC is to gradually subtract the interference of the user with the maximum signal power, the SIC detector makes data decisions for multiple users one by one in the received signal, and determines that one user simultaneously subtracts the Multiple Access Interference (MAI) caused by the user signal, and operates according to the order of the signal power, and the signal with larger power operates first. This is done cyclically until all the multiple access interference is cancelled.

FIG. 2 is a schematic flow diagram of a method of cooperative coding according to one embodiment of the present invention. The method of fig. 2 is performed by the user equipment of fig. 1. The method of fig. 2 includes the following.

And 210, the first user equipment acquires decoding information of the second user equipment and acquires first data to be decoded in the data to be decoded of the second user equipment, wherein the decoding information is used for decoding the first data to be decoded, the first user equipment is one of at least one user equipment which cooperates with the second user equipment to decode the data to be decoded, and the first user equipment and the second user equipment communicate with the base station in a non-orthogonal multiple access mode.

And 220, the first user equipment decodes the first data to be decoded according to the decoding information to obtain first decoded data.

The first user equipment transmits the first decoded data to the second user equipment 230.

In particular, the user equipment may communicate with the base station using a non-orthogonal multiple access approach (e.g., NOMA or SCMA). The data to be decoded is data (for example, NOMA encoded data or SCMA encoded data) obtained by the base station encoding data that needs to be sent to the second user equipment. The second user equipment can perform cooperative decoding on the data to be decoded by at least one first user equipment, wherein the data to be decoded can be divided into a plurality of parts, each first user equipment shares a part of decoding work, after each first user equipment performs cooperative decoding, an obtained decoding result is sent to the second user equipment, and the second user equipment performs subsequent processing.

It should be understood that the second user equipment and the first user equipment may communicate in a Device-to-Device (D2D) manner, and the embodiment of the present invention is not limited thereto, for example, the second user equipment and the first user equipment may also communicate through the base station.

Optionally, as another embodiment, in 210, the first user equipment acquires the decoding information sent by the base station, and acquires the first data to be decoded sent by the second user equipment.

Specifically, the base station may allocate decoding information to the ue under its coverage or within a certain set, and notify each ue of the decoding information, so that the first ue may receive the decoding information of the second ue sent by the base station. It should be understood that the base station may also set the user equipment capable of cooperating with other users for decoding as a cooperation set, and only transmit decoding information of the user equipment in the cooperation set to the user equipment in the cooperation set. The base station may transmit the encoded data to the second user equipment, and the second user equipment allocates a part of data to the first user equipment first after receiving the encoded data transmitted by the base station, and then transmits the part of data to the first user equipment. In this way, the first user equipment can obtain the data which needs to be decoded cooperatively from the second user equipment directly.

Optionally, as another embodiment, the method of fig. 2 further includes: the method comprises the steps that first user equipment receives a first message sent by a base station, wherein the first message is used for informing the first user equipment of reporting the information of the capability of cooperative decoding; the first user equipment reports the information of the capability of cooperative decoding to the base station, so that the base station determines a cooperation set according to the information of the capability of cooperative decoding, wherein the cooperation set comprises the at least one user equipment, and the step of acquiring the decoding information sent by the base station by the first user equipment comprises the following steps: the first user equipment receives decoding information of the user equipment in the cooperative set broadcasted or multicasted by the base station.

For example, the base station may first obtain information of the capability of cooperative decoding reported by the user equipments under its coverage or within a certain set, where the information includes at least one of the computing capability of the user equipments, the time period for supporting the computing capability, the location and signal quality of each user equipment, and the like. The base station can determine which user equipment has the ability to cooperate with other user equipment for decoding according to the information of the cooperative decoding ability of the user equipment. For example, if the signal quality of a certain ue is lower than a preset threshold, it is determined that the ue does not have the capability of cooperative decoding, or the capability of cooperative decoding is poor, otherwise it is determined that the ue has the capability of cooperative decoding, or the capability of cooperative decoding is good. For another example, it may also be determined that the ue in a certain range has the capability of cooperative decoding according to the location of the ue, for example, if the distance between the cooperating ues is greater than a preset threshold, the ue is considered not to have the capability of cooperative decoding. For another example, if the calculation capability of a certain ue is higher than the preset threshold, the ue is considered to have the capability of cooperative decoding. Of course, the embodiments of the present invention are not limited thereto, and it should be understood by those skilled in the art that when determining whether a certain ue has cooperative decoding capability, the ue may also be based on any combination of the above parameters. For example, when the computing power set by the user within a certain time period exceeds a preset threshold, it is determined that the user equipment has the cooperative decoding capability.

The base station may set the ue with cooperative decoding capability as a cooperation set, and notify all ues in the cooperation set of decoding information of all ues, so that some ues in the cooperation set perform cooperative decoding for other ues. According to the embodiment of the invention, the base station can select the proper user equipment for cooperative decoding according to the cooperative decoding capability of the user equipment, so that the processing capability of the user equipment can be enhanced, and the capability of other user equipment participating in the cooperation can be reasonably and effectively utilized.

Optionally, as another embodiment, in 210, the first ue obtains decoding information sent by the second ue; the first user equipment acquires first data to be decoded sent by the second user equipment.

For example, after receiving the encoded data and the corresponding decoding information sent by the base station, the second user equipment first allocates a part of data to the first user equipment, and then sends the part of data and the corresponding decoding information to the second user equipment. In this way, the first user equipment can directly obtain the data and the decoding information which need the second user equipment to perform the cooperative decoding.

Optionally, as another embodiment, the first user equipment and the second user equipment multiplex the same time-frequency resource. In 210, the first user equipment acquires the decoding information sent by the second user equipment; the method comprises the steps that first user equipment obtains time-frequency resource position information of first data to be decoded, which is sent by second user equipment; and the first user equipment acquires the first data to be decoded sent by the base station according to the time-frequency resource position information.

For example, under the condition that the first user equipment and the second user equipment multiplex the same resource, both the second user equipment and the first user equipment may receive the encoded data sent by the base station to the second user equipment, so that the second user equipment only needs to inform the first user equipment of the time-frequency resource location information of the data that needs to be decoded by the first user equipment in a cooperative manner, and the first user equipment may obtain the data that needs to be decoded by the first user equipment in a cooperative manner according to the time-frequency resource location information. In this case, the second user equipment does not need to send the data which needs the cooperative decoding of the first user equipment to the first user equipment, so that the resource utilization rate is improved.

It should be understood that the first ue may also obtain the time-frequency resource location information of the first data to be decoded directly from the base station.

Optionally, according to an embodiment of the present invention, the acquiring, by the first user equipment, the decoding information sent by the second user equipment includes: the first user equipment receives a second message sent by the second user equipment, and is configured to request the first user equipment to cooperate with the second user equipment to perform decoding, where the second message carries decoding information and a size of the first data to be decoded, and the decoding method in fig. 2 further includes: the first user equipment determines the cooperative second user equipment to decode according to the size of the first data to be decoded; and the first user equipment sends a third message to the second user equipment for confirming that the second user equipment is cooperated for decoding.

For example, after determining that the first user equipment has the cooperative decoding capability, the second user equipment sends a cooperative decoding request message to the first user equipment, where the cooperative decoding request may carry the size of data that needs to be subjected to cooperative decoding by the first user equipment, so that the first user equipment determines whether to provide cooperative decoding for the second user equipment according to the size of the data, for example, if the size of the data exceeds a preset threshold, the first user equipment may refuse to provide cooperative decoding for the second user equipment, so as to avoid affecting data processing of the first user equipment.

Optionally, as another embodiment, before the first user equipment receives the second message sent by the second user equipment, the decoding method in fig. 2 further includes: the first user equipment receives a fourth message sent by the second user equipment, wherein the fourth message is used for informing the first user equipment of reporting the information of the capability of cooperative decoding; the first user equipment reports the information of the capability of cooperative decoding to the first user equipment, so that the second user equipment determines that the first user equipment cooperates with the second user equipment to decode according to the information of the capability of cooperative decoding.

For example, when the second user equipment needs other user equipment to perform cooperative decoding, a notification reporting the information of the capability of the cooperative decoding may be sent to the first user equipment, the first user equipment may report the information of the capability of the cooperative decoding to the second user equipment, and the second user equipment selects an appropriate user equipment from the plurality of first user equipment to perform the cooperative decoding according to the received information of the capability of the cooperative decoding reported by the plurality of first user equipment, so that the processing capability of the user equipment can be enhanced and the capability of the other user equipment participating in the cooperation can be reasonably and effectively utilized.

According to an embodiment of the present invention, as another embodiment, the decoding information is a codebook used by the first data to be decoded, and when the first data to be decoded is transmitted between the first user equipment and the base station, the first data to be decoded multiplexes the same time-frequency resources with at least one data stream based on the codebook.

For example, the first user equipment and the second user equipment communicate with the base station in a sparse code division multiple access (SCMA) mode, data to be decoded is SCMA coded data, and decoding information is an SCMA codebook used by the first data to be decoded.

The SCMA employs a codebook that is a collection of two or more codewords.

The codeword may be a multi-dimensional complex field vector, the number of dimensions of which is two or more than two dimensions, and is used to represent a mapping relationship between data and two or more modulation symbols, where the modulation symbols include at least one zero modulation symbol and at least one non-zero modulation symbol, the data may be binary bit data or multivariate data, and the relationship between the zero modulation symbol and the non-zero modulation symbol may be that the number of zero modulation symbols is not less than the number of non-zero modulation symbols.

The codebook consists of two or more codewords. The codebook may represent a mapping of possible data combinations of data of a certain length to codewords in the codebook.

The SCMA technique implements extended transmission of data on multiple resource units by directly mapping data in a data stream into codewords, i.e., multidimensional complex vectors, in a codebook according to a certain mapping relationship. The data may be binary bit data or multivariate data, and the plurality of resource units may be resource units of time domain, frequency domain, space domain, time-frequency domain, time-space domain, and time-frequency space domain.

The code word adopted by the SCMA may have a certain sparsity, for example, the number of zero elements in the code word may be not less than the number of modulation symbols, so that a receiving end may utilize a multi-user detection technique to perform decoding with a lower complexity. Here, the above-listed relationship between the number of zero elements and the modulation symbol is only an exemplary sparse description, and the present invention is not limited thereto, and the ratio of the number of zero elements to the number of non-zero elements may be arbitrarily set as necessary.

For example, during decoding, the first user equipment may perform MPA (Message Passing Algorithm) iteration on the first data to be decoded according to an SCMA codebook of the second user equipment to obtain the first decoded data. The MPA-based iterative process may be similar to conventional techniques and will not be described in detail herein.

According to the embodiment of the present invention, the decoding information includes a power allocation factor adopted by the first data to be decoded, and when the first data to be decoded is transmitted between the first user equipment and the base station, the first data to be decoded multiplexes the same time-frequency resources with at least one data stream based on the power allocation factor.

For example, the first user equipment and the second user equipment communicate with the base station in a non-orthogonal multiple access (NOMA) manner, the data to be decoded is NOMA coded data, and the decoding information includes a power allocation factor adopted by the first data to be decoded.

For example, during decoding, the first user equipment may perform SIC on the first to-be-decoded spirit according to the time-frequency resource information, and may obtain the first decoded data through the SIC. In NOMA, a power allocation factor (or weight) is employed to represent the power allocation of different user equipments. Decoding based on the power allocation factor may be similar to conventional techniques and will not be described herein.

According to an embodiment of the present invention, the decoding information may be information of a signature matrix, where the signature matrix is used to generate a precoding matrix, and the precoding matrix is used to enable Multiple Input Multiple Output (MIMO) transmission of data to be decoded between multiple transmit antennas of the base station and multiple receive antennas formed by the second user equipment and the antenna of the at least one user equipment.

For example, the base station may generate a precoding matrix from the signature matrix and the channel matrix, precode data using the precoding matrix to generate encoded data, and transmit the encoded data to the user equipment, and in addition, the base station may transmit information of the signature matrix (e.g., the signature matrix or an index of the signature matrix) to the user equipment, so that the user equipment decodes the encoded data through MPA iteration according to the signature matrix.

Specifically, the base station may perform bit mapping processing (which may also be referred to as modulation processing) on multiple layers of information bits that need to be sent to the user terminal according to a preset constellation point set to generate L-layer data streams (i.e., L modulation symbol sequences), where the L-layer data streams correspond to the same time-frequency resource and L is greater than or equal to 2; the base station determines a signature matrix according to the number of layers L of the data stream and the number R of first spatial resources used by user equipment, wherein the signature matrix may include L first element sequences arranged along a first dimension direction, the L first element sequences correspond to the L layer data stream one to one, each first element sequence includes R first elements arranged along a second dimension direction, the R first elements correspond to the R first spatial resources one to one, the R first elements include at least one zero element and at least one non-zero element, R is greater than or equal to 2, and the L first element sequences are different from each other. The base station determines a pre-coding matrix according to the channel matrix and the signature matrix, and performs pre-coding processing on the L-layer data stream according to the pre-coding matrix P, wherein the channel matrix corresponds to a channel between the base station and the user equipment, the precoding matrix P comprises L second element sequences arranged along the first dimension direction, the L second element sequences correspond to the L first element sequences one to one, for example, the base station may determine, according to the ith first element sequence in the channel matrix and the signature matrix, the ith second element sequence corresponding to the ith data stream in the precoding matrix, and enabling the energy of the ith layer of data stream after precoding processing based on the ith second element sequence on the spatial domain resource corresponding to the zero element in the ith first element sequence to be zero or approximate to zero, wherein i belongs to [1, L ]. The base station may send the precoded L-layer data stream and information indicating the signature matrix to the ue, so that the base station may decode the precoded L-layer data stream according to the signature matrix S and the constellation point set to obtain the L-layer bit information.

FIG. 3 is a schematic flow diagram of a method of cooperative coding according to another embodiment of the present invention. The method of fig. 3 corresponds to the method of fig. 2, and is performed by the user equipment of fig. 1, and a detailed description is appropriately omitted herein. The method of fig. 3 includes the following.

And 310, receiving first decoding data sent by first user equipment by second user equipment, wherein the first user equipment is one of at least one user equipment which cooperates with the second user equipment to decode data to be decoded, the first decoding data is obtained by decoding the first data to be decoded in the data to be decoded of the second user equipment by the first user equipment according to decoding information of the second user equipment, the first user equipment and the second user equipment communicate with a base station in a non-orthogonal multiple access mode, and the decoding information is used for decoding the first data to be decoded.

And 320, the second user equipment obtains decoding data corresponding to the data to be decoded according to the first decoding data.

Specifically, the second ue cooperates with at least one ue to decode data to be decoded of the second ue. The second ue may obtain corresponding decoding results from the at least one ue, and combine the decoding results and the decoding results obtained by the second ue into a final decoding result.

According to the embodiment of the invention, the second user equipment can acquire the decoding data obtained by the cooperative decoding of other user equipment, and obtain the final decoding data according to the decoding data obtained by the user equipment. Because the first user equipment shares part of decoding work of the second user equipment, the capacity of the second user equipment for processing data to be decoded is improved, and the first user equipment is reasonably and effectively utilized.

Optionally, as another embodiment, the method of fig. 3 further includes: and the second user equipment sends the first data to be decoded to the first user equipment.

For example, the second user equipment may divide the data to be decoded into a plurality of portions, respectively allocated to the plurality of first user equipments. For example, the second user equipment may allocate data received in different time periods to different user equipments for cooperative decoding, which is not limited to this according to the embodiment of the present invention, and for example, the second user equipment may also block data to be decoded according to size and allocate the data to different user equipments for cooperative decoding.

Optionally, as another embodiment, before the second user equipment sends the first data to be decoded to the first user equipment, the method of fig. 3 further includes: the second user equipment receives a third message sent by the base station, wherein the third message is used for indicating a cooperation set, and the cooperation set comprises at least one user equipment; and the second user equipment determines that the first user equipment cooperates with the second user equipment to decode according to the third message.

For example, the base station may further send control signaling to the second user equipment through the downlink control channel, where the control signaling includes information of the cooperation set, which is used to indicate which user equipments can perform cooperative communication with the second user equipment.

Optionally, as another embodiment, the method of fig. 3 further includes: the second user equipment sends decoding information to the first user equipment; and the second user equipment sends the first data to be decoded to the first user equipment.

For example, the second user equipment may divide the data to be decoded into a plurality of portions, respectively allocated to the plurality of first user equipments.

Optionally, as another embodiment, the first user equipment and the second user equipment multiplex the same time-frequency resource, and the method in fig. 3 further includes: the second user equipment sends decoding information to the first user equipment; and the second user equipment sends the time-frequency resource position information of the first data to be decoded to the first user equipment.

According to an embodiment of the present invention, the sending, by the second user equipment, the decoding information to the first user equipment includes: the second user equipment sends a second message to the first user equipment, where the second message is used to request the first user equipment to cooperate with the second user equipment to perform decoding, and the second message carries decoding information and a size of the first data to be decoded, where the method in fig. 3 further includes: and the second user equipment receives a third message sent by the first user equipment, wherein the third message is used for confirming that the second user equipment is cooperated to decode.

Optionally, as another embodiment, before the second user equipment sends the second message to the first user equipment, the decoding method further includes: the second user equipment sends a fourth message to the first user equipment, wherein the fourth message is used for informing the first user equipment of the information of the capability of reporting the cooperative decoding; the second user equipment receives the information of the capability of cooperative decoding reported by the first user equipment; and the second user equipment determines that the first user equipment cooperates with the second user equipment for decoding according to the information of the capability of cooperative decoding.

According to the embodiment of the invention, when the first data to be decoded is transmitted between the first user equipment and the base station, the first data to be decoded and at least one data stream multiplex the same time-frequency resource based on the codebook

Optionally, as another embodiment, the decoding information includes a power allocation factor adopted by the first data to be decoded, and when the first data to be decoded is transmitted between the first user equipment and the base station, the first data to be decoded multiplexes the same time-frequency resources with the at least one data stream based on the power allocation factor.

For example, the decoding information is information of a signature matrix, the signature matrix is used for generating a precoding matrix, and the precoding matrix is used for enabling the data to be decoded to realize Multiple Input Multiple Output (MIMO) transmission between a plurality of transmitting antennas of the base station and a plurality of receiving antennas formed by the antennas of the second user equipment and the at least one user equipment.

The first user equipment and the second user equipment communicate with the base station in a non-orthogonal multiple access (NOMA) mode, data to be decoded is NOMA coded data, and decoding information comprises a power allocation factor adopted by the first data to be decoded.

FIG. 4 is a schematic flow diagram of a method of cooperative coding according to another embodiment of the present disclosure. The method of fig. 4 corresponds to the method of fig. 2, and is performed by the base station of fig. 1, and a detailed description thereof is appropriately omitted. The method of fig. 4 includes the following.

And 410, the base station sends a first message to the at least one first user equipment, wherein the first message is used for informing the at least one first user equipment of the capability of reporting the cooperative decoding.

The base station receives 420 information of the capability of cooperative decoding reported by the at least one first user equipment.

430, the base station decodes the information of the capability of cooperative decoding reported by the first ue to the broadcasted or multicasted at least one ue, so that the at least one first ue decodes the data to be decoded according to the decoding information of the second ue.

Specifically, the base station may determine a cooperation set according to the information of the capability of cooperative decoding, where the cooperation set includes at least one user equipment that cooperates with the second user equipment to decode the data to be decoded.

And 440, the base station sends a third message to the second user equipment, wherein the third message is used for indicating a cooperation set, and the cooperation set information comprises at least one user equipment.

Specifically, the base station sends a cooperation set selection message to each user equipment in its coverage area or in a certain set, so as to notify the user equipment of reporting cooperation capability information. And after receiving the cooperation set selection message sent by the base station, each user equipment feeds back cooperation capability information to the base station. And the base station demarcates the range of the cooperation set according to the cooperation capability information fed back by each first user equipment, and appoints the decoding information corresponding to each first user equipment in the cooperation set. The base station may set a first user equipment with cooperative communication capability in the cooperation set, and allocate corresponding decoding information to the first user equipment in the cooperation set. And the base station transmits the decoding information corresponding to all the user equipment in the cooperation to each user equipment in the cooperation set. Then, the base station encodes data of the second user equipment and transmits the encoded data to the second user equipment. Meanwhile, the base station may also send a control signaling to the second user equipment through the downlink control channel, so as to indicate which user equipments can perform cooperative communication with the second user equipment.

According to the embodiment of the invention, the base station can determine that the first user equipment can perform cooperative decoding on the second user equipment according to the information of the cooperative decoding capability of the first user equipment, and sends the decoding information of the second user equipment to the first user equipment, so that the first user equipment can share part of decoding work of the second user equipment according to the decoding information, thereby improving the capability of the second user equipment for processing data to be decoded and simultaneously enabling the first user equipment to be reasonably and effectively utilized.

According to the embodiment of the invention, the decoding information is a codebook used by the first data to be decoded, and when the first data to be decoded is transmitted between the first user equipment and the base station, the first data to be decoded and at least one data stream multiplex the same time-frequency resource based on the codebook

According to the embodiment of the invention, the decoding information is information of a signature matrix, the signature matrix is used for generating a precoding matrix, and the precoding matrix is used for enabling the data to be decoded to realize multiple-input multiple-output (MIMO) transmission between a plurality of transmitting antennas of the base station and a plurality of receiving antennas formed by the antennas of the second user equipment and the at least one user equipment.

FIG. 5 is a schematic flow diagram of a process of cooperative coding according to another embodiment of this disclosure. The embodiment of fig. 5 is an example of the method of fig. 2, 3 and 4, and a detailed description is appropriately omitted herein. The method of fig. 5 includes the following.

The eNodeB sends 510 a cooperation capability request to each UE for informing the UE to report the cooperation capability information.

The cooperative capability information may include at least one of its computing capabilities, time periods supporting the computing capabilities, locations of the respective UEs, signal quality, and the like.

The embodiment of the present invention does not limit the name of the message for notifying the UE to report the cooperation capability information, for example, when the cooperation capability information is used to determine a cooperation set, the message may also be referred to as a cooperation set selection message, and the cooperation set may include a user equipment with a cooperation decoding capability.

And 520, after receiving the cooperation capability request sent by the eNodeB, each UE feeds back the cooperation capability information to the eNodeB.

And 530, the eNodeB demarcates the range of the cooperation set according to the cooperation capability information fed back by each UE, and appoints an SCMA codebook corresponding to each UE in the cooperation set.

The eNodeB may set UEs with cooperative communication capability in a cooperation set, for example, in this embodiment, the cooperation set includes UE a, UE B, and UE C, and allocates corresponding SCMA codebooks to the UEs in the cooperation set to form an SCMA codebook set.

540, the eNodeB transmits the SCMA codebook corresponding to the UE in the cooperating set.

For example, the eNodeB may transmit the SCMA codebook set to the UEs in the cooperating set in the form of a broadcast or multicast message.

Of course, if the eNodeB only needs to determine the device for cooperative decoding for a certain UE (e.g., UE B), the eNodeB may also only notify the codebook information of UE B to the respective UEs (e.g., UE a and UE C).

And 550, the eNodeB performs SCMA coding on the data to be transmitted to the UE B, transmits the data after SCMA coding to the UE B, and simultaneously transmits cooperation set information for indicating which UEs can perform cooperative communication with the UE B. For example, the collaboration set information may be carried in a data frame in which the data is transmitted.

Alternatively, as another embodiment, the eNodeB performs SCMA encoding on the data that needs to be transmitted to UE B, and transmits the data after SCMA encoding to UE B. The eNodeB may also send a control signaling to UE B through a downlink control channel, so as to indicate which UEs can perform cooperative communication with UE B.

560, after receiving the SCMA data and the control signaling sent by eNodeB, UE B divides the SCMA data to be decoded into multiple parts, and notifies neighboring UE a and UE C through cooperative communication.

570, after receiving SCMA coded data from UE B, UE A and UE C find out the codebook corresponding to UE B according to the SCMA codebook set issued by eNodeB before, and decode UE B;

580, after the UE A and the UE A finish decoding, the decoding result is fed back to the UE B.

FIG. 6 is a schematic flow diagram of a process of cooperative coding according to another embodiment of this disclosure. The embodiment of fig. 6 is an example of the method of fig. 2, 3 and 4, and a detailed description is appropriately omitted herein. The method of fig. 6 includes the following.

The eNodeB transmits SCMA encoded data to UE B610.

For example, the eNodeB performs SCMA coding on data to be transmitted to the UE B to obtain SCMA coded data, and transmits the SCMA coded data to the UE B through a downlink channel.

Optionally, as another embodiment, in a case that UE a, UE B, and UE C multiplex the same time-frequency resource, UE a and UE C may also receive data sent by the base station to UE B at the same time.

And 620, after receiving the SCMA coded data, the UE B sends a cooperation capability request to the neighbor UE for requesting the UE A and the UE C to report the cooperation capability information.

For example, if UE B needs neighbor UE a and UE C to decode SCMA encoded data cooperatively, UE B sends a cooperative capability request to UE a and UE C for instructing UE a and UE B to report available computing capability and/or time parameters, etc.

The neighbor UE reports 630 its available computing power, and/or a time parameter that the available computing power can support, to UE B after receiving the cooperation capability request of UE B.

For example, neighbor UE a and UE C may report their available computing capabilities and/or time periods that the available computing capabilities can support to UE B.

And 640, the UE B makes a cooperative decoding decision according to the available computing capacity reported by the neighbor UE and/or the time parameter which can be supported by the available computing capacity, and decides to select the neighbor UE for cooperative decoding.

Specifically, UE B may select UE a and UE C to perform cooperative decoding when the available computing power reported by UE a and UE C is greater than a certain preset value and the time period is within a preset time range.

And 650, UE B decides to initiate cooperative communication and initiates a cooperation request message to the neighbor UE A and UE C.

Specifically, the cooperation request message may carry SCMA codebook information of UE B and a size of a data block that requires cooperative decoding by UE a and UE C.

And 660, after receiving the message, the UE a determines whether to perform cooperative decoding on the UE B according to the size of the data block.

Although UE a has the capability to cooperate UE B for cooperative decoding, UE a may also decide whether to perform cooperative decoding according to the size of the data block, for example, UE a may refuse to perform cooperative decoding when the size of the data block exceeds a predetermined value.

665, UE a sends a response message to UE B, the response message confirming whether UE a agrees to perform cooperative decoding.

670, after receiving the message, UE C determines whether to agree to perform cooperative decoding for UE B.

675, UE C sends a response message to UE B, which confirms whether UE C agrees to the cooperative decoding.

680, UE C agrees to cooperative decoding, UE B sends partial SCMA encoded data to it. The partial SCMA coded data is SCMA coded data which needs UE C to perform cooperative decoding.

Alternatively, as another embodiment, the UE B may also transmit the time-frequency resource corresponding to the partial SCMA encoded data instead of transmitting the partial SCMA encoded data to the UE B.

Specifically, the partial SCMA coded data is SCMA coded data that requires UE C to perform cooperative decoding. Since UE b and UE C use the same time-frequency resources when communicating with the base station, UE C is able to receive SCMA encoded data of UE b from the base station. And the UE C determines the part of SCMA coded data according to the position and the size of the received time-frequency resource of the part of SCMA coded data.

Because the SCMA resources are multiplexed by multiple users, multiple users in a downlink scene occupy the same time-frequency resource block, and decoding is performed by using different codebooks. In this scenario, if UE C and UE B are multiplexed users, then UE C receives SCMA data while also receiving UE B's data. If the terminal processor capability of UE C is strong, UE B can be helped to carry out cooperative communication, and then UE B does not need to send data needing cooperative decoding to UE C, and only needs to transmit the position and size of time-frequency resources needing cooperative decoding.

690, UE C performs cooperative decoding of the portion of SCMA encoded data.

695, UE C feeds back the decoding result to UE B.

It should be appreciated that if a neighbor UE does not agree to perform cooperative decoding, UE B does not perform cooperative coding with the neighbor UE. For example, in this embodiment, since UE a does not agree to perform cooperative decoding, UE B does not perform cooperative decoding with UE a.

Figure 7 is a schematic diagram of the encoding principle of SCMA. The embodiment of fig. 7 is described by taking an example in which 6 data streams multiplex 4 resource units.

Referring to fig. 7, the data streams may also be referred to as variable nodes and the resource units may also be referred to as functional nodes, wherein 6 data streams constitute one packet and 4 resource units constitute one coding unit. A Resource Element may be a Resource Element, or a Resource Element (RE), or an antenna port. The presence of a connection between a data stream and a resource unit indicates that at least one data combination of the data stream will send a non-zero modulation symbol on the resource unit after codeword mapping, and the absence of a connection between the data stream and the resource unit indicates that all possible data combinations of the data stream will send zero modulation symbols on the resource unit after codeword mapping. The data combination of the data stream can be understood as set forth below, for example, in a binary bit data stream, 00, 01, 10, 11 are all possible two-bit data combinations. For convenience of description, data combinations to be transmitted for 6 data streams in the bipartite graph are sequentially denoted by s1 to s6, and symbols transmitted on 4 resource elements in the bipartite graph are sequentially denoted by x1 to x 4. After codeword mapping, data of each data stream may send modulation symbols on two or more resource units, and meanwhile, a symbol sent by each resource unit is a superposition of modulation symbols of data of two or more data streams after respective codeword mapping. For example, the data combination s3 to be sent of the data stream 3 may be coded to send non-zero modulation symbols on resource unit 1 and resource unit 2, and the data x3 sent by the resource unit 3 is a superposition of the non-zero modulation symbols obtained by coding the data combinations s2, s4 and s6 to be sent of the data stream 2, data stream 4 and data stream 6, respectively. Because the number of data streams can be larger than the number of resource units, the SCMA system can effectively increase the network capacity, including the number of accessible users and the spectrum efficiency of the system.

It will be appreciated that the flow of the embodiments of figures 5 and 6 may also be similarly applied to the NOMA technique, except that in the NOMA technique, NOMA-encoded data is decoded according to a power allocation factor. Described below in conjunction with fig. 8.

FIG. 8 is a schematic flow diagram of a process of cooperative coding according to another embodiment of this disclosure. The embodiment of fig. 8 is an example of the method of fig. 2, 3 and 4, and a detailed description is appropriately omitted herein. The method of fig. 8 includes the following.

The eNodeB sends a cooperation capability request to each UE 810, informing the UE to report the cooperation capability information.

And 820, after receiving the cooperation capability request sent by the eNodeB, each UE feeds back the cooperation capability information to the eNodeB.

830, the eNodeB defines a range of the cooperation set according to the cooperation capability information fed back by each UE, and specifies a power allocation factor corresponding to each UE in the cooperation set.

For example, the eNodeB may set UEs with cooperative communication capability in a cooperation set, and allocate corresponding power allocation factors to the UEs in the cooperation set.

840, the eNodeB transmits the power allocation factor corresponding to each UE in the cooperating set to the UEs in the cooperating set.

For example, the eNodeB may transmit the power allocation factor used by each UE to the UEs in the cooperating set in the form of a broadcast or multicast message.

And 850, the eNodeB carries out NOMA coding on the data which needs to be transmitted to the UE B, transmits the data after NOMA coding to the UE B, and simultaneously sends cooperation set information for indicating which UEs can carry out cooperation communication with the UE B. For example, the collaboration set information may be carried in a data frame in which the data is transmitted.

Alternatively, as another embodiment, the eNodeB performs NOMA encoding on the data required to be transmitted to UE B, and transmits the data after NOMA encoding to UE B. Meanwhile, the eNodeB may also send a control signaling to the UE B through a downlink control channel, so as to indicate which UEs can perform cooperative communication with the UE B.

860, after receiving the NOMA data and the control signaling sent by the eNodeB, UE B divides the NOMA data to be decoded into a plurality of parts, and notifies neighboring UE a and UE C through cooperative communication, respectively.

870, after receiving the cooperation-requesting NOMA data from UE B, UE a and UE C decode UE B according to the power allocation factor issued by the eNodeB before.

880, after the UE A and the UE C finish decoding, the decoding result is fed back to the UE B.

FIG. 9 is a schematic diagram of a process of cooperative coding according to another embodiment of the invention. The embodiment of fig. 9 is an example of the method of fig. 2, 3 and 4, and a detailed description is appropriately omitted herein. The method of fig. 9 includes the following.

And 910, the base station calculates a precoding matrix according to the signature matrix.

In this embodiment, the number of antennas t of the base station is 8, the number of antennas r of the user equipment is 4, and the number of data streams l multiplexed is 6. Let the channel matrix be H, the size of H being 4 x 8.

Setting signature matrix

Wherein the number d of non-zero elements of each column of the signature matrix is 2.

The precoding matrix P is set such that the position of the non-zero element of the matrix HP is the same as the position of '1' in the matrix S.

For example, P can be calculated by:

1) firstly, defining matrix H according to the position of "1" in each column of signature matrix S₁～H₆And the matrix is defined according to the position of "0" in each column of the matrix S

For example, if the 1 st and 2 nd elements of the 1 st column of the matrix S are "1", let H₁＝H_{[1，2]，：}I.e. H₁Taking the 1 st and 2 nd rows of the matrix H; the 3 rd and 4 th elements are "0", then let

Namely, it is

To take the 3 rd and 4 th rows of matrix H, let H be "1" if the 2 nd and 3 rd elements of the 2 nd column of matrix S are "1"₂＝H_{[2，3]，：}I.e. H₂Taking the 2 nd and 3 rd rows of the matrix H; the 1 st and 4 th elements are "0", then let

Namely, it is

To take rows 3 and 4 of matrix H, and so on, H may be obtained₃，H₄，H₅，H₆And

2) calculating

Of (2) null space

Wherein

Size of 8 x 6: to pair

Performing singular value decomposition to obtain

3) Calculating

Of orthogonal subspace

To pair

Singular value decomposition is carried out:

two columns in total, each corresponding to a singular value σ₁，σ₂(∑_j＝diag(σ₁，σ₂) One column with a larger singular value is taken as s_j；

4) Generating a precoding matrix

Wherein D is a diagonal matrix for power allocation between data streams, which can be set according to actual needs.

920, the base station sends the signature matrix or the index number of the signature matrix to the user equipment through the control channel.

Let the data sent be

The base station will precode the data, i.e. transmit

930, the user equipment receives the data and the signature matrix, and the received data y is HPx + n, where n is noise.

940, the user equipment carries out MPA iterative decoding on the received data according to the signature matrix, and demodulates the data sent by the base station.

For example, the user equipment may demodulate

In this embodiment, 4 antennas of the UE may be distributed over multiple UEs, and the distributed multiple antennas on the multiple UEs may implement the above steps through terminal cooperation.

In an embodiment, when the ue needs to perform cooperative decoding by other ues, the base station or the ue may send information of the signature matrix of the ue to the other ues, and the other ues decode data according to the signature matrix and feed back the decoded data to the ue. The process of the other ue acquiring the information of the signature matrix, decoding the data according to the information, and sending the decoded data to the ue is similar to the above embodiment, and will not be described in detail here.

Although the embodiment of the present invention is described by taking the user equipment using 4 antennas as an example, it should be understood by those skilled in the art that the embodiment of the present invention can be applied to the case of supporting more complicated SCMA or NOMA reception such as 8 antennas, and the higher SCMA or NOMA transmission mode.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

It should be understood that in various embodiments of the present invention, the names for various messages are not limited by the embodiments of the present invention, and other names may be adopted in different scenarios as needed.

It should also be understood that, in various embodiments of the present invention, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

The method for cooperative decoding according to the embodiment of the present invention is described above, and the user equipment and the base station according to the embodiment of the present invention are described below with reference to fig. 10 to fig. 15, respectively.

Fig. 10 is a schematic structural diagram of a user equipment 1000 according to an embodiment of the present invention. The user equipment 1000 includes an acquisition module 1010, a decoding module 1020, and a transmitting module 1030.

The obtaining module 1010 is configured to obtain decoding information of a second user equipment, and obtain first data to be decoded in data to be decoded of the second user equipment, where the decoding information is used to decode the first data to be decoded, the user equipment is one of at least one user equipment that cooperates with the second user equipment to decode the data to be decoded, and the user equipment and the second user equipment communicate with a base station in a non-orthogonal multiple access manner.

The decoding module 1020 is configured to decode the first data to be decoded according to the decoding information to obtain first decoded data.

The sending module 1030 is configured to send the first decoded data to the second user equipment.

According to the embodiment of the invention, one user equipment can acquire a part of data to be decoded of a second user equipment and decoding information of the part of data to be decoded, decode the part of data to be decoded according to the decoding information, and send a decoding result to the second user equipment, thereby realizing cooperative decoding. The user equipment shares a part of decoding work of the second user equipment, so that the capability of the second user equipment for processing data to be decoded is improved, and the user equipment is reasonably and effectively utilized.

According to an embodiment of the present invention, the obtaining module 1010 obtains decoding information sent by a base station, and obtains first data to be decoded sent by a second user equipment.

Optionally, as another embodiment, the obtaining module 1010 further receives a first message sent by the base station, where the first message is used to notify the ue of information of capability of reporting cooperative decoding; the sending module 1030 is further configured to determine a cooperation set according to the information of the capability of cooperative decoding, where the cooperation set includes at least one ue, and the obtaining module 1010 receives decoding information of ues in the cooperation set broadcasted or multicasted by the base station.

According to an embodiment of the present invention, the obtaining module 1010 obtains decoding information sent by the second user equipment, and obtains first data to be decoded sent by the second user equipment.

According to the embodiment of the present invention, the ue and the second ue multiplex the same time-frequency resource, the obtaining module 1010 obtains the decoding information sent by the second ue, obtains the time-frequency resource location information of the first to-be-decoded data sent by the second ue, and the ue obtains the first to-be-decoded data sent by the base station according to the time-frequency resource location information.

Optionally, as another embodiment, the obtaining module 1010 receives a second message sent by a second user equipment, and is configured to request the user equipment to cooperate with the second user equipment to perform decoding, where the second message carries decoding information and a size of first data to be decoded, and the user equipment further includes: the determining module 1040 is configured to determine, according to the size of the first data to be decoded, that the second user equipment cooperates with the sending module 1030 to perform decoding, where the sending module 1030 is further configured to send a third message to the second user equipment, so as to confirm that the second user equipment cooperates with the sending module to perform decoding.

Optionally, as another embodiment, before receiving the second message sent by the second user equipment, the obtaining module 1010 further receives a fourth message sent by the second user equipment, where the fourth message is used to notify the user equipment of information of capability of reporting cooperative decoding, and the user equipment further includes: a sending module 1030, configured to report information of the capability of cooperative decoding to the ue, so that the second ue determines that the ue cooperates with the second ue to perform decoding according to the information of the capability of cooperative decoding.

According to the embodiment of the present invention, the decoding information is a codebook used by the first data to be decoded, and when the first data to be decoded is transmitted between the user equipment and the base station, the first data to be decoded and at least one data stream multiplex the same time-frequency resources based on the codebook.

According to the embodiment of the present invention, the decoding information includes a power allocation factor adopted by the first data to be decoded, and when the first data to be decoded is transmitted between the user equipment and the base station, the first data to be decoded multiplexes the same time-frequency resources with at least one data stream based on the power allocation factor.

The operations and functions of the modules of the UE 1000 may refer to the method of fig. 2, which is not described herein again to avoid repetition.

Fig. 11 is a schematic structural diagram of a user equipment 1100 according to another embodiment of the present invention. The user equipment 1100 includes: a receiving module 1110 and a decoding module 1120.

The receiving module 1110 is configured to receive first decoding data sent by a user equipment, where the first user equipment is one of at least one user equipment that cooperates with the user equipment to decode data to be decoded, the first decoding data is obtained by decoding, by the first user equipment, first data to be decoded in data to be decoded of the user equipment according to decoding information of the user equipment, the first user equipment and the user equipment communicate with a base station in a non-orthogonal multiple access manner, and the decoding information is used to decode the first data to be decoded.

The decoding module 1120 is configured to obtain decoding data corresponding to data to be decoded according to the first decoding data.

According to the embodiment of the invention, the user equipment can acquire the decoding data obtained by the cooperative decoding of other user equipment, and obtain the final decoding data according to the decoding data obtained by the user equipment. The first user equipment shares part of decoding work of the user equipment, so that the capability of the user equipment for processing data to be decoded is improved, and the first user equipment is reasonably and effectively utilized.

Optionally, as another embodiment, the user equipment 1100 further includes: a sending module 1130 is configured to send the first data to be decoded to the first user equipment.

Optionally, as another embodiment, before the ue sends the first data to be decoded to the first ue, the receiving module 1110 further receives a third message sent by the base station, where the third message is used to indicate a cooperation set, and the cooperation set includes at least one ue, where the ue further includes: a determining module 1140, configured to determine that the first ue cooperates with the ue to perform decoding according to the third message.

Optionally, as another embodiment, the user equipment 1100 further includes: the sending module 1130 is configured to send the decoding information to the first user equipment, and send the first data to be decoded to the first user equipment.

Optionally, as another embodiment, the first user equipment and the user equipment multiplex the same time-frequency resource, and the user equipment 1100 further includes: the sending module 1130 is configured to send the decoding information to the first user equipment, and send the time-frequency resource location information of the first to-be-decoded data to the first user equipment.

Optionally, as another embodiment, the sending module 1130 sends a second message to the first user equipment, where the second message carries decoding information and a size of the first to-be-decoded data, and the receiving module 1110 further receives a third message sent by the first user equipment, and the third message is used to confirm that the cooperative user equipment performs decoding.

Optionally, as another embodiment, the sending module 1130 further sends, to the first user equipment, a fourth message before the user equipment sends the second message to the first user equipment, where the fourth message is used to notify the first user equipment of information about capability of reporting cooperative decoding, and the receiving module 1110 further receives the information about capability of reporting cooperative decoding by the first user equipment, where the user equipment further includes: a determining module 1140, configured to determine that the first ue cooperates with the ue for decoding according to the information of the capability of cooperative decoding.

According to the embodiment of the invention, the decoding information is information of a signature matrix, the signature matrix is used for generating a precoding matrix, and the precoding matrix is used for enabling the data to be decoded to realize MIMO transmission between a plurality of transmitting antennas of the base station and a plurality of receiving antennas formed by the user equipment and at least one antenna of the user equipment.

The operations and functions of the modules of the UE 1100 may refer to the method of fig. 3, which is not described herein again to avoid repetition.

Fig. 12 is a schematic structural diagram of a base station 1200 according to an embodiment of the present invention. The base station 1200 includes: a transmitting module 1210, a receiving module 1220, and a determining module 1230.

The sending module 1210 is configured to send a first message to the at least one first user equipment, where the first message is used to notify the at least one first user equipment of information on the capability of reporting the cooperative decoding.

The receiving module 1220 is configured to receive information of capability of cooperative decoding reported by at least one first ue.

The sending module 1210 sends, to at least one piece of broadcast or multicast decoding information of the user equipment according to the information of the capability of cooperative decoding reported by the first user equipment, so that the at least one piece of first user equipment decodes the data to be decoded according to the decoding information of the second user equipment, and sends a third message to the second user equipment, where the third message is used to indicate a cooperation set, and the cooperation set information includes the at least one piece of user equipment.

The operations and functions of the modules of the UE 1200 may refer to the method of fig. 4, which is not described herein again to avoid repetition.

Fig. 13 is a schematic structural diagram of a user equipment 1300 according to another embodiment of the present invention. User device 1300 includes a processor 1310, memory 1320, communication bus 1330, receiver 1340, and transmitter 1350.

The receiver 1340 is configured to obtain decoding information of a second user equipment, and obtain first data to be decoded in data to be decoded of the second user equipment, where the decoding information is used to decode the first data to be decoded, the user equipment is one of at least one user equipment that cooperates with the second user equipment to decode the data to be decoded, and the user equipment and the second user equipment communicate with the base station in a non-orthogonal multiple access manner.

The processor 1310 is configured to call the codes stored in the memory 1320 through the communication bus 1330, so as to decode the first data to be decoded according to the decoding information, thereby obtaining first decoded data.

The transmitter 1350 is configured to transmit the first decoded data to the second user equipment.

According to the embodiment of the present invention, the receiver 1340 obtains the decoding information sent by the base station and obtains the first data to be decoded sent by the second ue.

Optionally, as another embodiment, the receiver 1340 is further configured to receive a first message sent by the base station, where the first message is used to notify the ue of the capability of cooperative decoding, and the transmitter 1350 is further configured to determine a cooperation set according to the capability of cooperative decoding, where the cooperation set includes at least one ue, where the receiver 1340 receives decoding information of ues in the cooperation set broadcasted or multicasted by the base station.

According to the embodiment of the present invention, the receiver 1340 obtains the decoding information sent by the second ue and obtains the first data to be decoded sent by the second ue.

According to the embodiment of the present invention, the ue and the second ue multiplex the same time-frequency resource, the receiver 1340 obtains the decoding information sent by the second ue, obtains the time-frequency resource location information of the first to-be-decoded data sent by the second ue, and the ue obtains the first to-be-decoded data sent by the base station according to the time-frequency resource location information.

Optionally, as another embodiment, the receiver 1340 receives a second message sent by a second ue, and is configured to request the ue to cooperate with the second ue for decoding, where the second message carries decoding information and a size of the first data to be decoded, where the processor 1310 is further configured to determine that the second ue cooperates for decoding according to the size of the first data to be decoded, and the transmitter 1350 is further configured to send a third message to the second ue for confirming that the second ue cooperates for decoding.

Optionally, as another embodiment, before receiving the second message sent by the second user equipment, the receiver 1340 is further configured to receive a fourth message sent by the second user equipment, where the fourth message is used to notify the user equipment of information about capability of reporting cooperative decoding, and the processor 1310 is further configured to report the information about capability of reporting cooperative decoding to the user equipment, so that the second user equipment determines that the user equipment cooperates the second user equipment for decoding according to the information about capability of cooperative decoding.

According to the embodiment of the present invention, the decoding information is a codebook used by the first data to be decoded, and when the first data to be decoded is transmitted between the first user equipment and the base station, the first data to be decoded multiplexes the same time-frequency resources with at least one data stream based on the codebook.

The operations and functions of the modules of the UE 1300 may refer to the method of fig. 2, which is not described herein again to avoid repetition.

Fig. 14 is a schematic structural diagram of a user equipment according to another embodiment of the present invention. The user equipment 1400 includes: a processor 1410, a memory 1420, a communication bus 1430, a receiver 1440, and a receiver 1450.

The receiver 1440 is configured to receive first decoding data sent by a user equipment, where the first user equipment is one of at least one user equipment that cooperates with the user equipment to decode data to be decoded, the first decoding data is obtained by the first user equipment decoding first data to be decoded in data to be decoded of the user equipment according to decoding information of the user equipment, the first user equipment and the user equipment communicate with a base station in a non-orthogonal multiple access manner, and the decoding information is used to decode the first data to be decoded.

The processor 1410 is configured to call the code stored in the memory 1420 through the communication bus 1430, so as to obtain decoding data corresponding to the data to be decoded according to the first decoding data.

Optionally, as another embodiment, the transmitter 1450 is further configured to transmit the first data to be decoded to the first user equipment.

Optionally, as another embodiment, the receiver 1440 is further configured to receive, before the ue sends the first data to be decoded to the first ue, a third message sent by the base station, where the third message is used to indicate a cooperation set, and the cooperation set includes at least one ue, where the processor 1410 is further configured to determine that the first ue cooperates with the ue to perform decoding according to the third message.

Optionally, as another embodiment, the transmitter 1450 is further configured to transmit the decoding information to the first user equipment, and transmit the first data to be decoded to the first user equipment.

Optionally, as another embodiment, the first ue and the ue multiplex the same time-frequency resource, and the transmitter 1450 is further configured to send the decoding information to the first ue, and send the time-frequency resource location information of the first to-be-decoded data to the first ue.

Optionally, as another embodiment, the transmitter 1450 transmits a second message to the first user equipment, where the second message carries the decoding information and the size of the first data to be decoded, to request the first user equipment to cooperate with the user equipment for decoding, and the receiver 1440 further receives a third message transmitted by the first user equipment, and the third message is used to confirm that the cooperating user equipment performs decoding.

Optionally, as another embodiment, the transmitter 1450 is further configured to transmit a fourth message to the first user equipment before the user equipment transmits the second message to the first user equipment, where the fourth message is used to inform the first user equipment of information about capability of reporting cooperative decoding, where the receiver 1440 is further configured to receive the information about capability of cooperative decoding reported by the first user equipment, and where the processor 1410 is further configured to determine that the first user equipment cooperates with the user equipment to decode according to the information about capability of cooperative decoding.

The operations and functions of the UE 1400 module may refer to the method of fig. 3, which is not described herein again to avoid repetition.

Fig. 15 is a schematic structural diagram of a base station 1500 according to an embodiment of the present invention. The base station 1500 includes: a processor 1510, a memory 1520, a communication bus 1530, a receiver 1540, and a transmitter 1550.

The transmitter 1550 is configured to transmit a first message to the at least one first user equipment, the first message being used for notifying the at least one first user equipment of information of a capability of reporting the cooperative decoding.

The receiver 1540 is configured to receive information of the capability of cooperative decoding reported by the at least one first user equipment.

The sender 1550 is configured to decode, according to the information of the capability of cooperative decoding reported by the first user equipment, decoding information of at least one user equipment that is broadcast or multicast, so that the at least one first user equipment decodes, according to the decoding information of the second user equipment, data to be decoded, and sends a third message to the second user equipment, where the third message is used to indicate a cooperation set, and the cooperation set information includes the at least one user equipment.

The operations and functions of the UE 1500 module may refer to the method of fig. 4, which is not described herein again to avoid repetition.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

Technical features and descriptions in one embodiment above can be understood and applied to other embodiments for brevity and clarity of the application document, and are not described in detail in other embodiments.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A decoding method based on terminal cooperation is characterized by comprising the following steps:

a first user equipment acquires decoding information of a second user equipment and acquires first data to be decoded in data to be decoded of the second user equipment, wherein the decoding information is used for decoding the first data to be decoded, the first user equipment is one of at least one user equipment which cooperates with the second user equipment to decode the data to be decoded, and the first user equipment and the second user equipment communicate with a base station in a non-orthogonal multiple access mode;

the first user equipment decodes the first data to be decoded according to the decoding information to obtain first decoding data;

the first user equipment sends the first decoding data to the second user equipment.

2. The decoding method according to claim 1, wherein the obtaining, by the first user equipment, the decoding information of the second user equipment and obtaining the first data to be decoded in the data to be decoded of the second user equipment comprises:

and the first user equipment acquires the decoding information sent by the base station and acquires the first data to be decoded sent by the second user equipment.

3. The decoding method according to claim 1, further comprising:

the first user equipment receives a first message sent by the base station, wherein the first message is used for informing the first user equipment of the information of the capability of reporting the cooperative decoding;

the first user equipment reports the information of the capability of cooperative decoding to the base station, so that the base station determines a cooperation set according to the information of the capability of cooperative decoding, wherein the cooperation set comprises the at least one user equipment,

wherein, the acquiring, by the first user equipment, the decoding information sent by the base station includes:

the first user equipment receives coding information of the user equipment in the cooperation set broadcasted or multicasted by the base station.

4. The decoding method according to claim 1, wherein the obtaining, by the first user equipment, the decoding information of the second user equipment and obtaining the first data to be decoded in the data to be decoded of the second user equipment comprises:

the first user equipment acquires the decoding information sent by the second user equipment;

and the first user equipment acquires the first data to be decoded sent by the second user equipment.

5. The decoding method according to claim 1, wherein the first ue and the second ue multiplex the same time-frequency resource, and the first ue obtains decoding information of the second ue and obtains first data to be decoded in data to be decoded of the second ue, including:

the first user equipment acquires time-frequency resource position information of the first data to be decoded, which is sent by the second user equipment;

and the first user equipment acquires the first data to be decoded sent by the base station according to the time-frequency resource position information.

6. The decoding method according to claim 4 or 5, wherein the obtaining, by the first user equipment, the decoding information sent by the second user equipment comprises:

the first user equipment receives a second message sent by the second user equipment, and is used for requesting the first user equipment to cooperate with the second user equipment to decode, wherein the second message carries the decoding information and the size of the first data to be decoded,

wherein the coding method further comprises:

the first user equipment determines to cooperate with the second user equipment to carry out decoding according to the size of the first data to be decoded;

and the first user equipment sends a third message to the second user equipment for confirming that the second user equipment is cooperated for decoding.

7. The decoding method according to claim 6, wherein before the first user equipment receives the second message sent by the second user equipment, the decoding method further comprises:

the first user equipment receives a fourth message sent by the second user equipment, wherein the fourth message is used for informing the first user equipment of reporting the information of the capability of the cooperative decoding;

the first user equipment reports the information of the capability of cooperative decoding to the second user equipment, so that the second user equipment determines that the first user equipment cooperates with the second user equipment to decode according to the information of the capability of cooperative decoding.

8. The decoding method according to any of claims 1 to 5, wherein the decoding information is a codebook used by the first data to be decoded, and when the first data to be decoded is transmitted between the first user equipment and the base station, the first data to be decoded multiplexes the same time-frequency resources with at least one data stream based on the codebook.

9. The decoding method according to any of claims 1 to 5, wherein the decoding information includes a power allocation factor used by the first data to be decoded, and when the first data to be decoded is transmitted between the first user equipment and the base station, the first data to be decoded multiplexes the same time-frequency resources with at least one data stream based on the power allocation factor.

10. The decoding method according to any one of claims 1 to 5, wherein the decoding information is information of a signature matrix, the signature matrix is used for generating a precoding matrix, and the precoding matrix is used for enabling the data to be decoded to implement MIMO transmission between a plurality of transmitting antennas of the base station and a plurality of receiving antennas formed by the antennas of the second user equipment and the at least one user equipment.

11. A decoding method based on terminal cooperation is characterized by comprising the following steps:

the method comprises the steps that a second user device receives first decoding data sent by the first user device, wherein the first user device is one of at least one user device which is cooperated with the second user device to decode data to be decoded, the first decoding data is obtained by decoding first data to be decoded in the data to be decoded of the second user device by the first user device according to decoding information of the second user device, the first user device and the second user device communicate with a base station in a non-orthogonal multiple access mode, and the decoding information is used for decoding the first data to be decoded;

and the second user equipment obtains decoding data corresponding to the data to be decoded according to the first decoding data.

12. The coding method according to claim 11, wherein the method further comprises:

the second user equipment sends the first data to be decoded to the first user equipment.

13. The decoding method according to claim 12, wherein before the second user equipment sends the first data to be decoded to the first user equipment, the method further comprises:

the second user equipment receives a third message sent by a base station, wherein the third message is used for indicating a cooperation set, and the cooperation set comprises the at least one user equipment;

and the second user equipment determines that the first user equipment cooperates with the second user equipment to decode according to the third message.

14. The coding method according to claim 11, wherein the method further comprises:

the second user equipment sends the decoding information to the first user equipment;

15. The coding method of claim 11, wherein the first user equipment and the second user equipment multiplex the same time-frequency resources, the method further comprising:

and the second user equipment sends the time-frequency resource position information of the first data to be decoded to the first user equipment.

16. The decoding method according to claim 14 or 15, wherein the second ue sends the decoding information to the first ue, and comprises:

the second user equipment sends a second message to the first user equipment, and the second message is used for requesting the first user equipment to cooperate with the second user equipment to decode, wherein the second message carries the decoding information and the size of the first data to be decoded;

wherein the method further comprises:

and the second user equipment receives a third message sent by the first user equipment, wherein the third message is used for confirming that the second user equipment is cooperated to decode.

17. The decoding method according to claim 16, wherein before the second user equipment sends the second message to the first user equipment, the decoding method further comprises:

the second user equipment sends a fourth message to the first user equipment, wherein the fourth message is used for informing the first user equipment of the information of the capability of reporting the cooperative decoding;

the second user equipment receives the information of the capability of the cooperative coding reported by the first user equipment;

and the second user equipment determines that the first user equipment cooperates with the second user equipment for decoding according to the information of the capability of cooperative decoding.

18. The decoding method according to any of claims 11 to 15, wherein the decoding information is a codebook used by the first data to be decoded, and when the first data to be decoded is transmitted between the first user equipment and the base station, the first data to be decoded multiplexes the same time-frequency resources with at least one data stream based on the codebook.

19. The decoding method according to any of claims 11 to 15, wherein the decoding information includes a power allocation factor used by the first data to be decoded, and when the first data to be decoded is transmitted between the first user equipment and the base station, the first data to be decoded multiplexes the same time-frequency resources with at least one data stream based on the power allocation factor.

20. The decoding method according to any one of claims 11 to 15, wherein the decoding information is information of a signature matrix, the signature matrix is used for generating a precoding matrix, and the precoding matrix is used for enabling the data to be decoded to implement MIMO transmission between a plurality of transmitting antennas of the base station and a plurality of receiving antennas formed by the antennas of the second user equipment and the at least one user equipment.

21. A decoding method based on terminal cooperation is characterized by comprising the following steps:

the base station sends a first message to at least one first user equipment, wherein the first message is used for informing the at least one first user equipment of the information of the capability of reporting the cooperative decoding;

the base station receiving information of the capability of cooperative coding reported by the at least one first user equipment;

the base station broadcasts or multicasts decoding information of second user equipment to the at least one first user equipment according to the information of the capability of cooperative decoding reported by the at least one first user equipment, so that the at least one first user equipment can decode the data to be decoded of the second user equipment according to the decoding information of the second user equipment;

the base station sends a third message to the second user equipment, wherein the third message is used for indicating a cooperation set, and the cooperation set information comprises the at least one first user equipment.

22. The decoding method of claim 21, wherein the decoding information is a codebook used by a first data to be decoded in the data to be decoded, and when the first data to be decoded is transmitted between the first user equipment and the base station, the first data to be decoded multiplexes the same time-frequency resources with at least one data stream based on the codebook.

23. The decoding method according to claim 21, wherein the decoding information includes a power allocation factor used by a first data to be decoded in the data to be decoded, and when the first data to be decoded is transmitted between the first user equipment and the base station, the first data to be decoded multiplexes the same time-frequency resources with at least one data stream based on the power allocation factor.

24. The decoding method according to claim 21, wherein the decoding information is information of a signature matrix, and the signature matrix is used to generate a precoding matrix, and the precoding matrix is used to enable the data to be decoded to implement MIMO transmission between multiple transmit antennas of the base station and multiple receive antennas of the second user equipment and the at least one first user equipment.

25. A user device, comprising:

an obtaining module, configured to obtain decoding information of a second user equipment, and obtain first data to be decoded in data to be decoded of the second user equipment, where the decoding information is used to decode the first data to be decoded, the user equipment is one of at least one user equipment that cooperates with the second user equipment to decode the data to be decoded, and the user equipment and the second user equipment communicate with a base station in a non-orthogonal multiple access manner;

the decoding module is used for decoding the first data to be decoded according to the decoding information to obtain first decoded data;

a sending module, configured to send the first decoded data to the second user equipment.

26. The ue of claim 25, wherein the obtaining module obtains the decoding information sent by the base station, and obtains the first data to be decoded sent by the second ue.

27. The ue of claim 25, wherein the obtaining module further receives a first message sent by the base station, the first message is used to inform the ue of capability of reporting cooperative decoding, the sending module is further used to send the capability information of the cooperative decoding to the base station, so that the base station determines a cooperation set according to the capability information of the cooperative decoding, the cooperation set includes the at least one ue, and wherein the obtaining module receives decoding information of ues in the cooperation set broadcasted or multicasted by the base station.

28. The ue of claim 25, wherein the obtaining module obtains the decoding information sent by the second ue, and obtains the first data to be decoded sent by the second ue.

29. The ue of claim 25, wherein the ue and the second ue reuse the same time-frequency resource, the obtaining module obtains the decoding information sent by the second ue, obtains time-frequency resource location information of the first to-be-decoded data sent by the second ue, and the ue obtains the first to-be-decoded data sent by the base station according to the time-frequency resource location information.

30. The UE of claim 25 or 26, wherein the obtaining module receives a second message sent by the second UE, for requesting the UE to cooperate with the second UE to perform decoding, wherein the second message carries the decoding information and the size of the first data to be decoded,

wherein the user equipment further comprises:

and the determining module is used for determining to cooperate the second user equipment to decode according to the size of the first data to be decoded, and the sending module is also used for sending a third message to the second user equipment for confirming to cooperate the second user equipment to decode.

31. The UE of claim 30, wherein the obtaining module further receives a fourth message sent by the second UE before receiving the second message sent by the second UE, and the fourth message is used to inform the UE of the capability of reporting cooperative decoding,

the sending module is further configured to report information of capability of cooperative decoding to the second user equipment, so that the second user equipment determines that the user equipment cooperates with the second user equipment to perform decoding according to the information of the capability of cooperative decoding.

32. The UE of any one of claims 25 to 29, wherein the coding information is a codebook used by the first data to be coded, and when the UE and the base station transmit the first data to be coded, the first data to be coded multiplexes the same time-frequency resources with at least one data stream based on the codebook.

33. The UE of any of claims 25 to 29, wherein the coding information includes a power allocation factor used by the first data to be coded, and when the first data to be coded is transmitted between the first UE and the base station, the first data to be coded multiplexes the same time-frequency resources with at least one data stream based on the power allocation factor.

34. The UE of any one of claims 25 to 29, wherein the decoding information is information of a signature matrix, and the signature matrix is used to generate a precoding matrix, and the precoding matrix is used to enable the data to be decoded to implement MIMO transmission between multiple transmit antennas of the BS and multiple receive antennas of the second UE and the at least one UE.

35. A user device, comprising:

a receiving module, configured to receive first decoding data sent by a first user equipment, where the first user equipment is one of at least one user equipment that cooperates with the user equipment to decode data to be decoded, the first decoding data is obtained by decoding, by the first user equipment, first data to be decoded in the data to be decoded of the user equipment according to decoding information of the user equipment, the first user equipment and the user equipment communicate with a base station in a non-orthogonal multiple access manner, and the decoding information is used to decode the first data to be decoded;

and the decoding module is used for obtaining decoding data corresponding to the data to be decoded according to the first decoding data.

36. The user equipment of claim 35, further comprising:

a sending module, configured to send the first data to be decoded to the first user equipment.

37. The UE of claim 36, wherein the receiving module further receives a third message sent by a base station before the UE sends the first data to be decoded to the first UE, wherein the third message is used to indicate a cooperation set, and the cooperation set comprises the at least one UE,

wherein the user equipment further comprises:

and the determining module is used for determining that the first user equipment cooperates with the user equipment to decode according to the third message.

38. The user equipment of claim 35, further comprising:

and the sending module is used for sending the decoding information to the first user equipment and sending the first data to be decoded to the first user equipment.

39. The ue of claim 35, wherein the first ue multiplexes the same time-frequency resources with the ue, and wherein the ue further comprises:

and the sending module is used for sending the decoding information to the first user equipment and sending the time-frequency resource position information of the first data to be decoded to the first user equipment.

40. The UE of claim 38 or 39, wherein the sending module sends a second message to the first UE for requesting the first UE to cooperate with the UE for decoding, wherein the second message carries the decoding information and the size of the first data to be decoded, wherein the receiving module further receives a third message sent by the first UE, and the third message is used for confirming to cooperate with the UE for decoding.

41. The UE of claim 40, wherein the sending module further sends a fourth message to the first UE before the UE sends the second message to the first UE, the fourth message informing the first UE of the capability of reporting cooperative decoding, wherein the receiving module further receives the information of the capability of cooperative decoding reported by the first UE,

wherein the user equipment further comprises:

and the determining module is used for determining that the first user equipment cooperates the user equipment for decoding according to the information of the capability of cooperative decoding.

42. The UE of any of claims 35 to 39, wherein the coding information is a codebook used by the first data to be coded, and when the UE and the base station transmit the first data to be coded, the first data to be coded multiplexes the same time-frequency resources with at least one data stream based on the codebook.

43. The UE of any of claims 35 to 39, wherein the coding information includes a power allocation factor used by the first data to be coded, and when the first data to be coded is transmitted between the UE and the base station, the first data to be coded multiplexes the same time-frequency resources with at least one data stream based on the power allocation factor.

44. The UE of any one of claims 35 to 39, wherein the decoding information is information of a signature matrix, and the signature matrix is used to generate a precoding matrix, and the precoding matrix is used to enable the data to be decoded to implement MIMO transmission between multiple transmit antennas of the BS and multiple receive antennas of the UE and the at least one UE.

45. A base station, comprising:

a sending module, configured to send a first message to at least one first user equipment, where the first message is used to notify the at least one first user equipment of information of a capability of reporting cooperative decoding;

a receiving module, configured to receive information of the capability of cooperative decoding reported by the at least one first user equipment, where the sending module is configured to broadcast or multicast, to the at least one first user equipment, decoding information of a second user equipment according to the information of the capability of cooperative decoding reported by the at least one first user equipment, so that the at least one first user equipment decodes data to be decoded of the second user equipment according to the decoding information of the second user equipment, and sends a third message to the second user equipment, where the third message is used to indicate a cooperation set, and the cooperation set information includes the at least one first user equipment.

46. The base station of claim 45, wherein the decoding information is an SCMA codebook used by a first data to be decoded of the data to be decoded, and when the first data to be decoded is transmitted between the first UE and the base station, the first data to be decoded multiplexes the same time-frequency resources with at least one data stream based on the codebook.

47. The base station of claim 45, wherein the decoding information comprises a power allocation factor used by a first data to be decoded of the data to be decoded, and when the first data to be decoded is transmitted between the UE and the base station, the first data to be decoded multiplexes the same time-frequency resources with at least one data stream based on the power allocation factor.

48. The enb according to claim 45, wherein said decoding information is information of a signature matrix, said signature matrix is used to generate a precoding matrix, said precoding matrix is used to enable multiple-input multiple-output (MIMO) transmission of said data to be decoded between multiple transmit antennas of said enb and multiple receive antennas of said second ue and said at least one first ue.