CN118018075A

CN118018075A - Communication method, communication device, computer readable storage medium and related system

Info

Publication number: CN118018075A
Application number: CN202410411755.4A
Authority: CN
Inventors: 赵大骞; 郑国增; 曹永照; 曾勇波
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2024-04-08
Filing date: 2024-04-08
Publication date: 2024-05-10
Anticipated expiration: 2044-04-08
Also published as: CN118018075B

Abstract

The application provides a communication method, a communication device, a computer readable storage medium and a related system. The method comprises the following steps: the first communication device acquires first downlink receiving signals, wherein the first downlink receiving signals are determined by B first downlink sending signals from B second communication devices, one first downlink sending signal is from one second communication device, the first downlink sending signals are obtained by precoding the first signals through a first precoding vector by the second communication device, and B is a positive integer greater than or equal to 2; determining a second precoding vector; precoding the first signal through a second precoding vector to obtain a first uplink transmission signal, and transmitting the first uplink transmission signal to B second communication devices; and precoding the first downlink receiving signals by using the second precoding vector to obtain second uplink sending signals, and sending the second uplink sending signals to the B second communication devices. The embodiment of the application can improve the precoding precision.

Description

Communication method, communication device, computer readable storage medium and related system

Technical Field

The present application relates to the field of wireless communications technologies, and in particular, to a communication method, a communication device, a computer readable storage medium, and a related system.

Background

The radio access networks (radio access network, RAN) of existing mobile communication systems have various forms of networking, including centralized RAN (centralized RAN, CRAN) networking and distributed networking (e.g., internet protocol RAN (internet protocol RAN, IPRAN)). In CRAN networking, different RAN devices have ideal backhaul (backhaul), that is, transmission delay between different RAN devices is small, so that real-time information interaction between RAN devices can be performed. In the IPRAN networking, the backhaul between different RAN devices is not ideal, that is, the transmission delay between different RAN devices is large, so that the interaction of real-time information between the RAN devices cannot be performed.

In a multi-station cooperative ideal backhaul scenario, an efficient data transmission manner of coherent joint transmission (coherent joint transmission, CJT) can be realized by means of real-time information interaction capability among RAN devices, and all RAN devices can use Weighted Minimum Mean Square Error (WMMSE) algorithm (weighted minimum mean-square error) for centralized computation to realize joint precoding. However, in the multi-station cooperative non-ideal backhaul scenario, as the RAN equipment increases, the computation complexity of the joint precoding increases, and the precoding accuracy is difficult to ensure, so how to improve the precoding accuracy is a problem to be solved.

Disclosure of Invention

Embodiments of the present application provide a communication method, a communication apparatus, a computer-readable storage medium, and a related system, which can improve the accuracy of precoding.

In a first aspect, the present application provides a communication method, which may be applied to a first communication device, or to a device (e.g., a chip, or a system on a chip, or a circuit) in the first communication device, or a device that can be used in cooperation with the first communication device, and will be described below by taking the application to the first communication device as an example. The method may include: the first communication device acquires first downlink receiving signals, wherein the first downlink receiving signals are determined by B first downlink sending signals from B second communication devices, one first downlink sending signal is from one second communication device, the first downlink sending signals are obtained by precoding the first signals through a first precoding vector by the second communication device, and B is a positive integer greater than or equal to 2; determining a second precoding vector; precoding the first signal through a second precoding vector to obtain a first uplink transmission signal, and transmitting the first uplink transmission signal to B second communication devices; and precoding the first downlink receiving signals by using the second precoding vector to obtain second uplink sending signals, and sending the second uplink sending signals to the B second communication devices.

In the scheme provided in this embodiment, in the time division duplex (time division duplex, TDD) mode or the frequency division duplex (frequency division duplex, FDD) mode, the first communication device may operate on a previous received signal (such as a first downlink received signal), that is, precode the first downlink received signal by using a second precoding vector to obtain a second uplink transmission signal and transmit the second uplink transmission signal, so that the second communication device may obtain interference information according to the second uplink transmission signal, and may perform precoding update according to the interference information when performing downlink joint data transmission, thereby improving the precoding accuracy and improving the accuracy of data transmission. Further, the first communication device may perform precoding on the first downlink receiving signal by using the updated precoding vector (e.g., the second precoding vector) to obtain a second uplink sending signal, and send the second uplink sending signal to the plurality of second communication devices.

In one possible implementation, the communication method may further include: and receiving B downlink coherent joint transmission data of B second communication devices, wherein one downlink coherent joint transmission data is from one second communication device, the downlink coherent joint transmission data is obtained by precoding downlink transmission data by the second communication device according to a third precoding vector, the third precoding vector is determined by the second communication device according to a first uplink receiving signal, a second uplink receiving signal and a first signal, the first uplink receiving signal is determined according to K first uplink sending signals from K first communication devices, the second uplink receiving signal is determined according to K second uplink sending signals from K first communication devices, and K is a positive integer greater than or equal to 2. Through the scheme provided by the embodiment, each second communication device can update the precoding vector according to the first uplink receiving signal and the second uplink receiving signal, and the updated precoding vector is used for precoding downlink transmission data, so that the precoding precision can be improved, and the accuracy of downlink coherent joint transmission data is improved.

One possible implementation manner, precoding the first downlink received signal using the second precoding vector to obtain a second uplink transmission signal includes: determining a rank 1 matrix according to the second precoding vector; and precoding the first downlink receiving signal by using the rank 1 matrix to obtain a second uplink transmitting signal. Through the scheme provided by the embodiment, the first communication device can operate the previous received signal (such as the first downlink received signal), that is, precoding the first downlink received signal through the second precoding vector to obtain the second uplink transmission signal and transmitting the second uplink transmission signal, so that the second communication device can obtain interference information according to the second uplink transmission signal, and can perform precoding update according to the interference information when downlink combined data transmission is performed, thereby improving the accuracy of precoding and improving the accuracy of data transmission.

Possible implementation manner, first downlink receiving signal and first communication deviceWith the second communication device/>Channel matrix between, second communication device/>For the first communication device/>Is allocated to the first communication device/>One or more of the first signals of (a).

One possible implementation manner, the first downlink received signal satisfies:

Wherein, Representing the first communication means/>First downlink received signal acquired in first downlink stage,/>Representing conjugate transpose operation,/>Representing the first communication means/>With the second communication device/>Channel matrix between,/>Representing the second communication device/>For the first communication device/>First precoding vector,/>Representing allocation to a first communication deviceFirst signal of/>Representing the length of the first signal,/>Representing the first communication means/>The additive white gaussian noise received in the first downlink stage has a mean of 0 and a variance of/>I.e./>。

In one possible implementation, determining the second precoding vector includes: a second precoding vector is determined based on the first downlink received signal and the first signal. By the scheme provided in this embodiment, the first communication device can receive the signal (e.g. the first downlink received signal) according to the previous received signal) A new precoding vector (e.g., a second precoding vector) is constructed and the previous received signal is weighted and then transmitted to the plurality of second communication devices again. The first communication device operates the previous received signal, so that the second communication device can obtain interference information according to the second uplink transmission signal, and precoding update can be performed according to the interference information when downlink combined data transmission is performed, thereby improving the accuracy of precoding and improving the accuracy of data transmission.

In one possible implementation, the second precoding vector satisfies:

Wherein, Representing the first communication means/>Is a second precoding vector,/>Representing the first communication means/>First downlink received signal acquired in first downlink stage,/>Representing conjugate transpose operation,/>Representing allocation to first communication means/>Is a first signal of (a).

Possible implementation manner, second precoding vector and first communication deviceWith the second communication device/>Channel matrix between, second communication device/>For the first communication device/>One or more of the first precoding vectors of (a).

In one possible implementation, the second precoding vector satisfies:

Wherein, Representing the first communication means/>Is a second precoding vector,/>Representing downlink equivalent channel,/>Representing the first communication means/>With the second communication device/>Channel matrix between,/>Represents the operation of conjugate transposition,Representing the second communication device/>For the first communication device/>First precoding vector,/>The N-dimensional identity matrix is represented, and N represents the number of antennas of the first communication device.

A possible implementation manner, the second uplink transmission signal isWherein/>Representing a rank 1 matrix determined from the second precoding vector,/>Representing the first communication means/>And the first downlink receiving signal is acquired in the first downlink stage.

In a second aspect, the present application provides a communication method which can be applied to a second communication device, a device (e.g., a chip, or a chip system, or a circuit) in the second communication device, or a device which can be used in cooperation with the second communication device, and will be described below by taking the application to the second communication device as an example. The method may include: the second communication device performs precoding on the first signals through the first precoding vectors to obtain first downlink transmission signals, and transmits the first downlink transmission signals to K first communication devices, wherein K is a positive integer greater than or equal to 2; receiving K first uplink transmission signals from K first communication devices, wherein one first uplink transmission signal is from one first communication device, and the first uplink transmission signal is obtained by precoding the first signals through second precoding vectors by the first communication device; determining a first uplink receiving signal according to the K first uplink sending signals; receiving K second uplink transmission signals from K first communication devices, wherein one second uplink transmission signal is from one first communication device, the first uplink transmission signal is obtained by precoding a first downlink reception signal through a second precoding vector by the first communication device, and the first downlink reception signal is determined by the first communication device according to B first downlink transmission signals from B second communication devices; determining a second uplink receiving signal according to the K second uplink sending signals; and obtaining a third precoding vector according to the first uplink receiving signal, the second uplink receiving signal and the first signal.

In the scheme provided in this embodiment, in the TDD mode or the FDD mode, the first communication device may operate on a previous received signal (such as a first downlink received signal), that is, precode the first downlink received signal by using a second precoding vector to obtain a second uplink transmission signal and transmit the second uplink transmission signal, so that the second communication device may obtain interference information according to the second uplink transmission signal, and may perform precoding update according to the interference information when performing downlink joint data transmission, thereby improving the accuracy of precoding and improving the accuracy of data transmission. Further, the first communication device may perform precoding on the first downlink receiving signal by using the updated precoding vector (e.g., the second precoding vector) to obtain a second uplink sending signal, and send the second uplink sending signal to the plurality of second communication devices.

It should be understood that the implementation body of the second aspect may be a second communication device, where specific details of the second aspect correspond to those of the first aspect, and corresponding features and achieved beneficial effects of the second aspect may refer to the description of the first aspect, and detailed descriptions are omitted herein as appropriate to avoid repetition.

In one possible implementation, the communication method may further include: precoding downlink transmission data through a third precoding vector; and transmitting the precoded downlink coherent joint transmission data to the K first communication devices.

A possible implementation manner, a first uplink receiving signal and a first communication deviceWith the second communication device/>Channel matrix between, first communication device/>First uplink transmission signal, first communication apparatus/>Is allocated to the first communication device/>One or more of the first signals of (a).

In one possible implementation manner, the first uplink received signal satisfies:

Wherein, Representing the second communication device/>A first uplink received signal acquired in a first uplink stage,Representing the first communication means/>With the second communication device/>Upstream equivalent channel between,/>Representing the first communication means/>With the second communication device/>Channel matrix between,/>Representing the first communication means/>Is used for the second precoding vector of (c),Representing conjugate transpose operation,/>Representing allocation to first communication means/>First signal of/>Representing the second communication device/>The average value of the additive Gaussian white noise received in the first uplink stage is 0, and the variance is/>I.e./>。

A possible implementation manner, the second uplink received signal, the second precoding vector and the first communication deviceWith the second communication device/>Channel matrix between, second communication device/>For the first communication device/>Is allocated to the first communication device/>One or more of the first signals of (a).

In one possible implementation manner, the second uplink received signal satisfies:

Wherein, Representing the second communication device/>A second uplink received signal acquired in a second uplink stage,Representing the first communication means/>With the second communication device/>Upstream equivalent channel between,/>Representing the first communication means/>With the second communication device/>Channel matrix between,/>Representing the first communication means/>Is used for the second precoding vector of (c),Representing conjugate transpose operation,/>Representing the second communication device/>For the first communication device/>Is used for the first pre-coding vector of (c),Representing allocation to first communication means/>First signal of/>Representing the first communication means/>The additive white gaussian noise received in the first downlink stage has a mean of 0 and a variance of/>I.e./>，/>Representing the second communication device/>The additive white gaussian noise received in the second uplink stage has a mean of 0 and a variance of/>I.e./>。

Possible implementation manner, third precoding vector and second communication deviceFirst uplink received signal acquired in first uplink stage and allocated to first communication device/>First signal, second communication device/>For the first communication device/>First precoding vector of (a), second communication device/>One or more of the second uplink received signals acquired in the second uplink stage.

In one possible implementation, the third precoding vector satisfies:

Wherein, Representing the second communication device/>For the first communication device/>Third precoding vector,/>Representing the second communication device/>First uplink received signal acquired in first uplink stage,/>Representing conjugate transpose operation,/>Is a dual variable related to each second communication device power constraint,/>Represents M-dimensional identity matrix, M represents the antenna number of the second communication device,/>Representing allocation to first communication means/>First signal of/>Representing the length of the first signal,/>Representing the second communication device/>For the first communication device/>First precoding vector,/>Representing the second communication device/>And a second uplink received signal acquired in a second uplink stage.

Possible implementation manner, third precoding vector second communication deviceFor the first communication device/>First precoding vector, first communication device/>Related to one or more of the second precoding vectors of (a).

In one possible implementation, the third precoding vector satisfies:

Wherein, Representing the second communication device/>For the first communication device/>Third precoding vector,/>Representing allocation to first communication means/>For determining the priority of K first communication devices,/>, for determining the priority of K first communication devicesRepresenting conjugate transpose operation,/>Is a dual variable related to each second communication device power constraint,/>Represents M-dimensional identity matrix, M represents the antenna number of the second communication device,/>Representing the second communication device/>For the first communication device/>Is used for the first pre-coding vector of (c),Representing the first communication means/>With the second communication device/>Upstream equivalent channel between,/>Representing the first communication means/>With the second communication device/>Channel matrix between,/>Representing the first communication means/>Is used for the second precoding vector of the (c).

In a third aspect, the present application provides a communication device comprising means/units for performing the method of any of the first aspect and possible implementations thereof. The device may be the first communication device, a module (e.g. a chip, a system on a chip, or a processor) applied to the first communication device, or a logic node, a logic module, or software that can implement all or part of the functions of the first communication device.

In a fourth aspect, the present application provides a communications apparatus comprising means/units for performing the method of any of the second aspect and possible implementations thereof. The device may be the second communication device, a module (e.g. a chip, a system on a chip, or a processor) applied to the second communication device, or a logic node, a logic module, or software that can implement all or part of the functionality of the second communication device.

In a fifth aspect, embodiments of the present application provide a communication device that may be a first communication device, or may be a device (e.g., a chip, or a system-on-a-chip, or a circuit) in the first communication device. The communication device may comprise a processor coupled to a memory for storing programs or instructions which, when executed by the processor, cause the communication device to perform the method of the first communication device, or a device in the first communication device, of the above-described method embodiments.

In a sixth aspect, embodiments of the present application provide a communication device that may be a second communication device, or may be a device (e.g., a chip, or a system-on-a-chip, or a circuit) in the second communication device. The communication device may comprise a processor coupled to a memory for storing programs or instructions which, when executed by the processor, cause the communication device to perform the method of the above-described method embodiments performed by the second communication device, or by a device in the second communication device.

In a seventh aspect, embodiments of the present application provide a computer readable storage medium having stored therein a computer program or computer instructions which, when run on a computer, cause the computer to perform the method of the first aspect or any of the possible implementations of the first aspect, the second aspect or any of the possible implementations of the second aspect.

In an eighth aspect, embodiments of the present application provide a computer program product comprising program instructions which, when run on a computer, cause the computer to perform the method of the first aspect or any of the possible implementations of the first aspect, the second aspect or any of the possible implementations of the second aspect.

In a ninth aspect, an embodiment of the present application provides a chip system, where the chip system includes a processor, and the processor is configured to implement the functions in the methods described above. In one possible implementation, the system on a chip may also include memory for storing program instructions and/or data. The chip system may be formed of a chip or may include a chip and other discrete devices.

In a tenth aspect, embodiments of the present application provide a communication system comprising a first communication device and a second communication device for performing any of the methods of the first to second aspects described above when the first and second communication devices are operating in the communication system.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the description of the embodiments will be briefly described below.

Fig. 1 is a schematic diagram of a network architecture of a mobile communication system according to an embodiment of the present application;

FIG. 2 is a schematic diagram of an ideal backhaul scenario provided by an embodiment of the present application;

Fig. 3 is a schematic diagram of a non-ideal backhaul scenario provided by an embodiment of the present application;

FIG. 4 is a schematic view of a scenario of collaborative set expansion provided by an embodiment of the present application;

FIG. 5 is an interactive schematic diagram of a communication method according to an embodiment of the present application;

fig. 6 is a schematic diagram of a scenario of multi-station cooperative data transmission according to an embodiment of the present application;

Fig. 7 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of another communication device according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of a first communication device according to an embodiment of the present application.

Detailed Description

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

The terms first and second and the like in the description, in the claims and in the drawings are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the present application, "at least one (item)" means one or more, "a plurality" means two or more, "at least two (items)" means two or three and more, "and/or" for describing an association relationship of an association object, and three kinds of relationships may exist, for example, "a and/or B" may represent: only a, only B and both a and B are present, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b or c may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.

In the present application, "transmitting information" may be understood as transmitting information from one device to another device, or may be understood as transmitting information from one logic module to another logic module within the device. For example, "access network device sending information" may be understood as an access network device sending information to another device (e.g. a terminal), or may be understood as a logic module 1 in an access network device sending information to a logic module 2 in an access network device.

In the present application, "receiving information" may be understood as that one device receives information from another device, or may be understood as that one logic module inside the device receives information from another logic module. For example, "access network device receives information" may be understood as the access network device receives information from another device (e.g., a terminal), or may be understood as logic 1 in the access network device receives information from logic 2 in the access network device.

In the present application, "transmitting information to … (e.g., a terminal)" is understood to mean that the destination of the information is a terminal. May include directly or indirectly transmitting information to the terminal. "receiving information from … (e.g., a terminal)" or "receiving information from … (e.g., a terminal)" may be understood that the source of the information is a terminal, and may include directly or indirectly receiving information from a terminal. The information may be subjected to necessary processing, such as format change, etc., between the source and destination of the information transmission, but the destination can understand the valid information from the source. Similar expressions in the present application can be understood similarly, and will not be described here again.

For a better understanding of the embodiments of the present application, the following first describes a system architecture related to the embodiments of the present application:

It should be understood that the technical solution of the embodiment of the present application may be applied to various communication systems, for example: global system for mobile communications (global system for mobile communication, GSM) system, code division multiple access (code division multiple access, CDMA) system, wideband code division multiple access (wideband code division multiple access, WCDMA) system, general packet radio service (GENERAL PACKET radio service, GPRS), long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD) system, universal mobile telecommunications (universal mobile telecommunications system, UMTS) system, enhanced data rates for GSM evolution (ENHANCED DATA RATE for GSM evolution, EDGE) system, worldwide interoperability for microwave access (worldwide interoperability for microwave access, wiMAX) system. The technical solution of the embodiment of the present application may also be applied to other communication systems, such as a public land mobile network (public land mobile network, PLMN) system, an advanced long term evolution (LTE ADVANCED, LTE-a) system, a fifth generation mobile communication (the 5th generation,5G) system, a New Radio (NR) system, an open RAN (ora) system, a machine-to-machine communication (machine to machine, M2M) system, or other communication systems evolving in the future, etc., which are not limited in this embodiment of the present application. The technical solution provided by the embodiment of the present application may also be applied to other communication systems, as long as the entity in the communication system can send control information and send (and/or receive) transport blocks, and the entity in the communication system can receive control information and receive (and/or send) transport blocks.

An exemplary explanation follows with respect to the system architecture shown in fig. 1. As shown in fig. 1, the communication system 1000 includes a radio access network (radio access network, RAN) 100, a Core Network (CN) 200, and the internet 300.RAN 100 includes at least one access network device (e.g., 110a and 110b, collectively 110 in fig. 1) and at least one terminal (e.g., 120a-120j, collectively 120 in fig. 1). Other RAN nodes may also be included in the RAN 100, such as wireless relay devices and/or wireless backhaul devices (not shown in fig. 1), and the like. The terminal 120 is connected to the access network device 110 by wireless means. The access network device 110 is connected to the core network 200 by wireless or wired means. The core network device in the core network 200 and the access network device 110 in the RAN 100 may be different physical devices, or may be the same physical device with integrated core network logic functions and radio access network logic functions.

It should be noted that the RAN 100 may be a cellular system related to the third generation partnership project (3rd generation partnership project,3GPP), for example, a 4G, 5G mobile communication system, or a 5G later evolution system (for example, a 6G mobile communication system). RAN 100 may also be an open RAN, O-RAN or ORAN, a cloud radio access network (cloud radio access network, CRAN), or the like. RAN 100 may also be a communication system in which two or more of the above systems are converged. It should be noted that the numbers of access network devices and terminal devices in fig. 1 are only illustrative and should not be considered as a specific limitation of the present application. The terminal device and the access network device related to the system architecture are described in detail below.

1. Terminal equipment

The terminal device may be referred to as a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), etc., or a device for providing voice or data connectivity to a user, or may be an internet of things device. For example, the terminal device includes a handheld device having a wireless connection function, an in-vehicle device, and the like. Currently, the terminal device may be: a mobile phone, a tablet computer, a notebook computer, a palm computer, a mobile internet device (mobile INTERNET DEVICE, MID), a wearable device (e.g., a smart watch, a smart bracelet, a pedometer, etc.), a vehicle-mounted device (e.g., an automobile, a bicycle, an electric car, an airplane, a ship, a train, a high-speed rail, etc.), a satellite terminal, a Virtual Reality (VR) device, an augmented reality (augmented reality, AR) device, a point of sale (POS) machine, a customer terminal device (customer-premises equipment, CPE), a wireless terminal in industrial control, a smart home device (e.g., a refrigerator, a television, an air conditioner, an electricity meter, etc.), a smart robot, a robotic arm, a workshop device, a wireless terminal in unmanned aerial vehicle, a wireless terminal in a telemedicine, a wireless terminal in smart grid (SMART GRID), a wireless terminal in transportation security, a wireless terminal in a smart city, or a wireless terminal in a smart home, a flying device (e.g., a smart robot, a hot air balloon, an unmanned aerial vehicle, an airplane, etc.). The terminal device may also be other devices with terminal functions, for example, the terminal device may also be a device functioning as a terminal function in D2D communication.

The embodiment of the application does not limit the device form of the terminal, and the device for realizing the function of the terminal device can be the terminal device; or a device, such as a chip system, capable of supporting the terminal device to implement the function. The device can be installed in or matched with the terminal equipment. In the embodiment of the application, the chip system can be composed of chips, and can also comprise chips and other discrete devices.

2. Access network device

The access network device is a node in a radio access network (radio access network, RAN), which may also be referred to as a network device, and may also be referred to as a RAN node (or device). The access network device is used for helping the terminal to realize wireless access. The plurality of access network devices 110 in the communication system 1000 may be the same type of node or different types of nodes. In some scenarios, the roles of access network device 110 and terminal 120 are relative, e.g., network element 120i in fig. 1 may be a helicopter or drone, which may be configured as a mobile base station, network element 120i being a base station for those terminals 120j that access RAN 100 through network element 120 i; but for base station 110a network element 120i is a terminal. Access network device 110 and terminal 120 are sometimes referred to as communication devices, e.g., network elements 110a and 110b in fig. 1 may be understood as communication devices with base station functionality and network elements 120a-120j may be understood as communication devices with terminal functionality.

In one possible scenario, the access network device may be a base station (bs), an evolved NodeB (eNodeB), a transmission and reception point (TRANSMITTING AND RECEIVING point, TRP), a transmission point (TRANSMITTING POINT, TP), a next generation base station (gNB), a next generation base station in a sixth generation (6th generation,6G) mobile communication system, a base station in a future mobile communication system, a satellite, an access backhaul (IAB) node, an access network device in a mobile switching center non-terrestrial communication network (non-TERRESTRIAL NETWORK, NTN) communication system, i.e. may be deployed on an altitude platform or a satellite, etc. The access network device may be a macro base station (e.g., 110a in fig. 1), a micro base station or an indoor station (e.g., 110b in fig. 1), a relay node or a donor node, or a radio controller in a CRAN scenario. The access network device may also be a device-to-device (D2D) communication, a device functioning as a base station in internet of vehicles communication, drone communication, machine communication. Optionally, the access network device may also be a server, a wearable device, a vehicle or vehicle-mounted device, or the like. For example, the access network device in the vehicle extrapolating (vehicle to everything, V2X) technology may be a Road Side Unit (RSU).

All or part of the functionality of the access network device in the present application may also be implemented by software functions running on hardware or by virtualized functions instantiated on a platform, such as a cloud platform. The access network device in the present application may also be a logical node, a logical module or software capable of implementing all or part of the functions of the access network device.

In another possible scenario, a plurality of access network devices cooperate to assist a terminal in implementing wireless access, and different access network devices implement part of the functionality of a base station respectively. For example, the access network device may be a Centralized Unit (CU), a Distributed Unit (DU), a CU-Control Plane (CP), a CU-User Plane (UP), or a Radio Unit (RU), etc. The CUs and DUs may be provided separately or may be included in the same network element, e.g. in a baseband unit (BBU). The RU may be included in a radio frequency device or unit, such as in a remote radio unit (remote radio unit, RRU), an active antenna processing unit (ACTIVE ANTENNA unit, AAU), or a remote radio head (remote radio head, RRH). It is understood that the access network device may be a CU node, or a DU node, or a device comprising a CU node and a DU node. In addition, the CU may be divided into access network devices in the access network RAN, or may be divided into access network devices in the core network CN, which is not limited herein.

In different systems, CUs (or CU-CP and CU-UP), DUs or RUs may also have different names, but the meaning will be understood by those skilled in the art. For example, in ORAN systems, a CU may also be referred to as an O-CU (open CU), a DU may also be referred to as an O-DU, a CU-CP may also be referred to as an O-CU-CP, a CU-UP may also be referred to as an O-CU-UP, and a RU may also be referred to as an O-RU. For convenience of description, the present application is described by taking CU, CU-CP, CU-UP, DU and RU as examples. Any unit of CU (or CU-CP, CU-UP), DU and RU in the present application may be implemented by a software module, a hardware module, or a combination of software and hardware modules.

In the embodiment of the present application, the form of the access network device is not limited, and the device for implementing the function of the access network device may be the access network device; or may be a device, such as a system-on-a-chip, capable of supporting the access network equipment to perform this function. The apparatus may be installed in or used in cooperation with an access network device.

The network devices and/or terminals may be fixed or mobile. Network devices and/or terminals may be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; the device can be deployed on the water surface; but also on aerial planes, balloons and satellites. The application scenarios of the network device and the terminal are not limited in the present disclosure. The network device and the terminal device may be deployed in the same scenario or in different scenarios, e.g., the network device and the terminal device are deployed on land at the same time; or the network equipment is deployed on land, the terminal equipment is deployed on water surface, etc., which are not exemplified one by one.

In the embodiment of the application, the terminal equipment or the network equipment comprises a hardware layer, an operating system layer running on the hardware layer and an application layer running on the operating system layer. The hardware layer includes hardware such as a central processing unit (central processing unit, CPU), a memory management unit (memory management unit, MMU), and a memory (also referred to as a main memory). The operating system may be any one or more computer operating systems that implement business processes through processes (processes), such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system. The application layer comprises applications such as a browser, an address book, word processing software, instant messaging software and the like. Further, the embodiment of the present application is not particularly limited to the specific structure of the execution body of the method provided by the embodiment of the present application, as long as the communication can be performed by the method provided according to the embodiment of the present application by running the program recorded with the code of the method provided by the embodiment of the present application, and for example, the execution body of the method provided by the embodiment of the present application may be a terminal device or a network device, or a functional module in the terminal device or the network device that can call the program and execute the program.

Furthermore, various aspects or features of the application 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 encompasses 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 or tape, etc.), optical disks (e.g., compact Disk (CD), digital versatile disk (DIGITAL VERSATILE DISC, DVD), etc.), smart cards, and flash memory devices (e.g., erasable programmable read-only memory (EPROM), card, stick, key drive, etc.). Additionally, 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.

It should be noted that the number and types of network devices and terminal devices included in the network architecture shown in fig. 1 are merely examples, and embodiments of the present application are not limited thereto. For example, more or fewer terminal devices in communication with the network device may also be included. For simplicity of description, it is not depicted in the drawings one by one. In addition, in the network architecture shown in fig. 1, although the network device and the terminal device are shown, the application scenario may not be limited to include the network device, the terminal device, for example, may also include a core network device or a device for carrying a virtualized network function, which will be obvious to those skilled in the art, and will not be described in detail herein.

A description of technical terms that may appear in the embodiments of the present application is given below. The terminology used in the description of the embodiments of the application herein is for the purpose of describing particular embodiments of the application only and is not intended to be limiting of the application. It is to be understood that the following definitions of various technical terms are provided by way of example only. For example, as technology continues to evolve, the scope of the above definition may also change, and embodiments of the application are not limited.

(1) Coherent cooperative transmission mechanism (CJT)

The terminal device, due to its mobility, can move from the coverage area center of an access network device to the edge area of the access network device. The edge area is located within the coverage area of multiple access network devices, so that other signal transmissions may cause strong interference to the terminal device, and the data transmission performance of the terminal device may be poor. To improve data transmission performance of terminal devices located in the edge region, long term evolution (long term evolution, LTE) and New Radio (NR) introduce coherent cooperative transmission (coherent joint transmission, CJT) mechanisms.

The cqt mechanism is that a plurality of access network devices transmit data to a terminal device through a coherent transmission mode. All data information and channel state information (CHANNEL STATE information, CSI) between the access network devices and the terminal device are known to each other, so that the access network devices, like a distributed antenna array, can precode the same layer of data to be transmitted together. By "coherent transmission", it is meant that a plurality of access network devices may jointly transmit a certain data stream, so that the transmission signals of the plurality of access network devices may be superimposed in the same direction when reaching the terminal device, thereby doubling the power of the received signal and greatly reducing interference. In other words, the coherent transmission can change all interference among a plurality of access network devices into useful signals, so that the interference among the access network devices is avoided, and the data transmission performance can be remarkably improved.

Taking fig. 1 as an example, under the CJT mechanism, the access network device 110a and the access network device 110b provide the terminal device 120b with CJT. At this time, among the signals received by the terminal device 120b, the useful signals come from both access network devices. Under the mechanism of single-station transmission or incoherent cooperative transmission (non-coherent joint transmission, NCJT), only one service access network device can provide a useful signal, and other access network devices can cause interference to the service access network device. Thus, the cqt mechanism may significantly improve the signal-to-interference-and-noise ratio (signal to interferenceplus noise ratio, SINR).

(2) Precoding technique

If the sender is able to learn certain information of the channel (preconditions for precoding), the transmitted signal can be preprocessed with this information to improve the transmission rate and link reliability of the system. A technique of preprocessing a transmission signal using transmission-side channel state information (CHANNEL STATE information AT THE TRANSMITTER, csi) is called a precoding technique.

Purpose of precoding: if the precoding technology is not adopted, the base station transmits signals of a plurality of users on the same time-frequency resource, so that interference among the users is caused. Each user is limited by the number of its receiving antennas, and it is difficult to cancel interference from other users alone and recover the desired signal. In order to solve the interference problem between multiplexing users, the base station needs to pre-encode the transmission signal according to the CSIT. In addition, the precoding technology is adopted in the downlink of the multi-user MIMO system, and the complexity of the receiver can be reduced by placing a large amount of complex computation on the transmitting end with better computation performance.

(3) Minimum mean square error (minimum mean square error, MMSE) precoding

MMSE precoding optimizes transmission performance by minimizing the mean square error between the received signal and the original signal. The method considers the influence of channel noise and is suitable for different signal-to-noise ratio conditions. MMSE precoding minimizes the mean square error between the received signal and the original signal, and is suitable for different signal-to-noise ratio situations. MMSE precoding minimizes the mean square error of the received signal and the original signal, taking into account the effect of noise.

(4) Time division duplexing (time division duplex, TDD) and frequency division duplexing (frequency division duplex, FDD)

TDD and FDD are two large duplex modes in a communication system. For TDD mode, uplink and downlink data transmissions are interleaved in time allocation. For FDD, uplink and downlink data are respectively located in different frequency bands and transmitted simultaneously.

The embodiment of the application can be applied to a TDD mode or an FDD mode.

First, in order to facilitate understanding of the embodiments of the present application, technical problems to be solved by the present application are further analyzed and presented.

The enhancement of CJT in Rel-18 is mainly focused on the ideal backhaul scenario. Referring to fig. 2, fig. 2 is a schematic diagram of an ideal backhaul scenario according to an embodiment of the present application. As shown in fig. 2, CJT is in an ideal backhaul scenario, where backhaul of TRPs between stations is ideal. However, the non-ideal backhaul architecture is widely deployed in most areas, and referring to fig. 3, fig. 3 is a schematic diagram of a non-ideal backhaul scenario provided by the embodiment of the present application. As shown in fig. 3, CJT in a non-ideal backhaul scenario, where backhaul of TRPs between stations is non-ideal. The bandwidth and delay parameters for ideal backhaul and non-ideal backhaul and the manner of NCJT and CJT can be as follows in table 1:

TABLE 1 parameters corresponding to ideal and non-ideal backhaul

As shown in table 1, it can be seen that the bandwidth of the non-ideal backhaul is limited and has a higher latency than the ideal backhaul. Therefore, in Rel-19, for non-ideal backhaul scenarios, it is considered to enable CJT enhancement functionality with limited bandwidth latency.

Current implementations of precoding with respect to M-TRP (multi-TRP) include various schemes, the following exemplary lists being as follows:

The scheme is as follows: centralized precoding. Firstly, each TRP acquires a channel matrix and forwards the channel matrix to the BBU through a backhaul signaling; then, the BBU calculates the receiving right and the transmitting right through alternate optimization according to the channel matrix, then feeds back the transmitting right of the TRP-specific to each TRP through a feedback signaling, and finally, each terminal device calculates the receiving right of the terminal device.

The disadvantage of this solution is: as shown in fig. 4, for the conventional weight minimum mean square error (weighted minimum mean square error, WMMSE) precoding, all the user weights in the cluster (cluster) are calculated in a centralized manner, and as the collaboration set expands, the calculation complexity increases exponentially, and the precoding precision is poor; the traditional WMMSE precoding has high signaling interaction requirement on each TRP and high deployment cost; it is difficult to ensure that all TRPs are connected to the same BBU by a forward/backward link, and there are cases across BBUs (non-ideal forward/backward link).

Accordingly, the technical problems to be solved by the present application may include: how to improve the precoding precision based on the multi-station cooperative non-ideal backhaul scene and how to reduce the signaling overhead and the time delay. According to the embodiment of the application, the first communication device can operate the previous received signal (such as the first downlink received signal), namely, the first downlink received signal is precoded through the second precoding vector to obtain the second uplink transmission signal and transmitted, so that the second communication device can obtain interference information according to the second uplink transmission signal, precoding update can be performed according to the interference information when downlink combined data transmission is performed, the precoding precision can be improved, and the accuracy of data transmission is improved. Further, the first communication device may perform precoding on the first downlink receiving signal by using the updated precoding vector (e.g., the second precoding vector) to obtain a second uplink sending signal, and send the second uplink sending signal to the plurality of second communication devices.

The present application provides a plurality of communication methods, which will be described by the following embodiments, respectively. Some of these communication methods are directed to only a portion of the flow, and some may be applied to any one or more of the flows. It should be appreciated that these communication methods may be used in conjunction with one another.

It should be understood that the communication method may change with the evolution of the technical solution, and the technical solution provided by the present application is not limited to the process described below. Further, the description of the scene in the embodiment of the present application is only an example, and the scheme of the embodiment of the present application is not limited to be applied only to describing the scene, and is also applicable to the scene with similar problems.

The first communication device in the following embodiment (e.g., the method embodiment corresponding to fig. 5 below) may be a terminal apparatus in the network architecture shown in fig. 1, and the functions performed by the first communication device in this embodiment may also be performed by a device (e.g., a chip, or a chip system, or a circuit) in the first communication device. The second communication device in the embodiment described below may be an access network apparatus in the network architecture shown in fig. 1, and the functions performed by the second communication device in this embodiment may also be performed by a device (e.g., a chip, or a chip system, or a circuit) in the second communication device. The embodiments of the present application are described herein in a unified manner, and will not be described in detail later.

It should be noted that the embodiment of the present application may be suitable for an application scenario of downlink joint data transmission, and support system architectures of a plurality of first communication devices and a plurality of second communication devices (such as a system architecture of a plurality of first communication devices and a plurality of second communication devices with expanded collaboration set shown in fig. 4), and the number of specific second communication devices may be related to the collaboration set size.

The following describes a communication method provided by an embodiment of the present application. Referring to fig. 5, fig. 5 is an interaction schematic diagram of a communication method according to an embodiment of the present application. The method shown in fig. 5 may be any one of a plurality (e.g., K) of first communication devices and a plurality (e.g., B) of second communication devices (with the first communication device)Illustrative description of the examples,/>Represents a first set of communication devices, K is a positive integer greater than or equal to 2) and any second communication device (with the second communication device/>Illustrative description of the examples,/>Representing a second set of communication devices, B being a positive integer greater than or equal to 2). As shown in fig. 5, the communication method may include the following steps.

S501: second communication deviceAnd precoding the first signal through the first precoding vector to obtain a first downlink transmission signal.

Second communication deviceThe first signal may be precoded by a first precoding vector to obtain a first downlink transmit signal. Wherein the first precoding vector can also be understood as the second communication device/>Is a transmission right of (a). The first precoding vector may also be understood as first communication device/>Is used for the initial precoding vector of (a). The first downlink transmission signal may be a channel state information reference signal (CHANNEL STATE information REFERENCE SIGNAL, CSI-RS) or a DMRS, or may be another type of signal, which is not limited in the type of the first signal in this embodiment.

Optionally, the first communication deviceThe first precoding vector may be initialized prior to precoding the first signal with the first precoding vector. Illustratively, the first precoding vector is/>Can represent the second communication device/>Is used for the first precoding vector of the (c). Second communication device/>With the first precoding vector/>For the first signal/>Precoding to obtain a first downlink transmission signal/>。

S502: second communication deviceThe first downlink transmission signals are transmitted to the K first communication apparatuses. Accordingly, the first communication device/>, of the K first communication devicesReceive from/including the second communication deviceB first downlink transmission signals of B second communication apparatuses. /(I)

Second communication deviceAfter the first signal is precoded by using the first precoding vector to obtain a first downlink transmission signal, the first downlink transmission signal may be transmitted to K first communication apparatuses.

S503: first communication deviceA first downlink received signal is acquired.

First communication deviceAfter receiving the first downlink transmission signals from the B second communication apparatuses, the first downlink reception signals may be acquired.

In one embodiment, the first downlink received signal is associated with a first communication deviceWith the second communication device/>Channel matrix and second communication device/>, betweenFor the first communication device/>Is allocated to the first communication deviceOne or more of the first signals of (a). Illustratively, the first downlink received signal may satisfy:

It should be noted that S501 to S503 may be understood as a first downlink stage between the first communication device and the second communication device.

S504: first communication deviceAnd determining a second precoding vector, and precoding the first signal through the second precoding vector to obtain a first uplink transmission signal.

Among them, for the embodiment of determining the second precoding vector, the following two types may be exemplarily given:

First possible implementation manner, first communication device The second precoding vector may be determined from the first downlink received signal and the first signal. Illustratively, the second precoding vector may satisfy:

Wherein, Representing the first communication means/>Is a second precoding vector,/>Representing the first communication means/>And the first downlink receiving signal is acquired in the first downlink stage.

A second possible implementation manner, the second precoding vector and the first communication deviceWith the second communication device/>Channel matrix between, second communication device/>For the first communication device/>One or more of the first precoding vectors of (a). Illustratively, the second precoding vector may satisfy:

Wherein, Representing downlink equivalent channel,/>The N-dimensional identity matrix is represented, and N represents the number of antennas of the first communication device.

First communication deviceThe first signal is precoded by the second precoding vector to obtain a first uplink transmission signal, where the first uplink transmission signal may be a channel Sounding Reference Signal (SRS) REFERENCE SIGNAL or other types of signals, and the type of the first uplink transmission signal is not limited in this embodiment. Exemplary, the first uplink transmission signal is/>。

S505: first communication deviceAnd transmitting the first uplink transmission signal to the B second communication devices. Accordingly, the second communication device/>, of the B second communication devicesReceiving comprises the first communication device/>K first uplink transmission signals of K first communication apparatuses.

First communication deviceAfter the first signal is precoded by the second precoding vector to obtain a first uplink transmission signal, the first uplink transmission signal may be transmitted to B second communication apparatuses.

S506: second communication deviceAnd determining a first uplink receiving signal according to the K first uplink sending signals.

Second communication deviceAfter receiving K first uplink transmission signals of the K first communication apparatuses, a first uplink reception signal may be determined according to the K first uplink transmission signals.

In one embodiment, the first uplink received signal is associated with a first communication deviceWith the second communication device/>Channel matrix between, first communication device/>First uplink transmission signal, first communication apparatus/>Is allocated to the first communication device/>One or more of the first signals of (a). Illustratively, the first uplink received signal may satisfy:

As can be appreciated, the second communication deviceThe uplink equivalent channel can be obtained from the first uplink received signal, i.e. the first communication device/>With the second communication device/>Interference information between them.

It should be noted that S504 to S506 can be understood as the first communication deviceAnd a second communication device/>A first upstream stage in between.

S507: first communication deviceAnd precoding the first downlink receiving signal by using the second precoding vector to obtain a second uplink sending signal.

First communication deviceAnd precoding the first downlink receiving signal through a second precoding vector to obtain a second uplink sending signal, specifically, determining a rank 1 matrix according to the second precoding vector, and precoding the first downlink receiving signal through the rank 1 matrix to obtain the second uplink sending signal. Exemplary, the second uplink transmission signal is/>Wherein, the method comprises the steps of, wherein,Represents a rank 1 matrix determined from the second precoding vector,/>Representing the first communication means/>And the first downlink receiving signal is acquired in the first downlink stage.

As can be appreciated, the first communication deviceA new precoding vector (e.g., a second precoding vector) may be constructed and used for the previous received signal (e.g., the first downlink received signal/>) Weighted and then sent again to B second communication devices, or as can be understood as first communication device/>A new DMRS pilot sequence may be constructed using the second precoding vector and the first downlink received signal and transmitted to the B second communication devices.

The second uplink transmission signal may be a new DMRS (different from the first downlink reception signal), or may be another new signal, and the type of the second uplink transmission signal is not limited in this embodiment.

S508: first communication deviceAnd transmitting the second uplink transmission signals to the B second communication devices. Accordingly, the second communication device/>, of the B second communication devicesK second uplink transmission signals from the K first communication devices are received.

It should be noted that S507 and S508 can be understood as the first communication deviceAnd a second communication device/>A second upstream stage in between.

S509: second communication deviceAnd determining a second uplink receiving signal according to the K second uplink sending signals.

In one embodiment, a second uplink received signal and the second precoding vector, the first communication deviceWith the second communication device/>Channel matrix between, second communication device/>For the first communication device/>Is allocated to the first communication device/>One or more of the first signals of (a). Illustratively, the second uplink received signal may satisfy:

Wherein, Representing the second communication device/>A second uplink received signal acquired in a second uplink stage,Representing the first communication means/>With the second communication device/>Upstream equivalent channel between,/>Representing the second communication device/>The additive white gaussian noise received in the second uplink stage has a mean of 0 and a variance of/>I.e.。

As can be appreciated, the second communication deviceDetermining a second uplink received signal from the K second uplink transmitted signals, which after correlation with the first signal may include the first communication device/>With the second communication device/>Interference information between them. Each second communication device can recover the interference information of all the first communication devices from the same received signal, and the interference information between each second communication device and each first communication device is not required to be exchanged through the forward/backward signaling.

S510: second communication deviceAnd determining a third precoding vector according to the first uplink received signal, the second uplink received signal and the first signal.

First possible implementation manner, third precoding vector and second communication deviceFirst uplink received signal acquired in first uplink stage and allocated to first communication device/>First signal, second communication device/>For the first communication device/>First precoding vector of (a), second communication device/>One or more of the second uplink received signals acquired in the second uplink stage. Illustratively, the third precoding vector may satisfy:

Wherein, Representing the second communication device/>For the first communication device/>Third precoding vector,/>Representing the second communication device/>First uplink received signal acquired in first uplink stage,/>Is a dual variable related to each second communication device power constraint,/>Represents M-dimensional identity matrix, M represents the antenna number of the second communication device,/>Representing the second communication device/>And a second uplink received signal acquired in a second uplink stage.

Second possible implementation manner, third precoding vector second communication deviceFor the first communication device/>First precoding vector, first communication device/>Related to one or more of the second precoding vectors of (a). Illustratively, the third precoding vector may satisfy:

Wherein, Representing allocation to first communication means/>For determining the priority of the K first communication devices.

It will be appreciated that each second communication device may obtain the interference information required for the distributed joint precoding design, thereby enabling to increase the accuracy of the precoding when determining the third precoding vector.

Further, the method may further include:

s511: second communication device And precoding downlink transmission data through a third precoding vector.

S512: second communication deviceAnd transmitting the precoded downlink coherent joint transmission data to the K first communication devices. Accordingly, the first communication device/>, of the K first communication devicesAnd B pieces of downlink coherent joint data from the B pieces of second communication devices are received.

Second communication deviceAfter precoding the downlink transmission data by the third precoding vector, the precoded downlink coherent joint transmission data can be transmitted in downlink. The downlink transmission may include, but is not limited to, a physical downlink shared channel (physical downlink SHARED CHANNEL, PDSCH), a physical downlink control channel (physical downlink control channel, PDCCH), a channel state information reference signal (CHANNEL STATE information REFERENCE SIGNAL, CSI-RS), and the like. In other words, the downlink transmission may be a transmission of downlink control signaling, such as PDCCH; transmission of downlink data, such as PDSCH; transmission of downlink signals, such as CSI-RS; or any combination of downlink control signaling, downlink data and downlink signals, such as pdcch+pdsch, pdcch+csi-RS, pdsch+csi-RS, pdcch+pdsch+csi-RS.

It should be noted that S509 to S512 may be understood as a second downlink phase between the first communication apparatus and the second communication apparatus.

It should be understood that, in this embodiment, the sequence number of each process does not mean the sequence of execution, and the execution sequence of each process should be determined by its function and internal logic, and should not limit the implementation process of the embodiment of the present application.

In the scheme provided in this embodiment, in the TDD mode or the FDD mode, the first communication device may operate on a previous received signal (such as the first downlink received signal), that is, precode the first downlink received signal by using the third precoding vector to obtain a second uplink transmission signal and transmit the second uplink transmission signal, so that the second communication device may obtain interference information according to the second uplink transmission signal, and may perform precoding update according to the interference information when performing downlink joint data transmission, thereby improving the accuracy of precoding and improving the accuracy of data transmission. Further, the first communication device may perform precoding on the first downlink received signal by using the updated precoding vector (such as the third precoding vector) to obtain a second uplink transmission signal, and send the second uplink transmission signal to the plurality of second communication devices.

The method embodiment shown in fig. 5 is further described below by taking 2 first communication devices and 3 second communication devices as examples for a multi-station collaboration scenario in conjunction with the method embodiment shown in fig. 5. It will be understood that the number of the first communication devices and the number of the second communication devices in the embodiment of the method shown in fig. 5 in the present application are 2 and 3 are only examples, and the number of the first communication devices and the second communication devices in the embodiment of the method in the present application may also be other numbers, which is not limited in this embodiment of the present application.

Referring to fig. 6, fig. 6 is a schematic diagram of a scenario of multi-station cooperative data transmission according to an embodiment of the present application. As shown in fig. 6, the following steps may be included:

s1: DL-1: each second communication device precodes the first signal with the first precoding vector to obtain a first downlink transmission signal, and transmits the first downlink transmission signal to the first communication device 1 and the first communication device 2. For example, the second communication apparatus 1 passes through a first precoding vector thereof with respect to the first communication apparatus 1 First signal/>, to first communication device 1Precoding and a first precoding vector/>, by which to the first communication device 2First signal/>, to first communication device 2Precoding to obtain a first downlink transmission signal/>And transmits the first downlink transmission signal/>, of the second communication apparatus 1To the first communication device 1 and the first communication device 2; by means of which the second communication device 2 is presented with a first precoding vector/>, relative to the first communication device 1First signal/>, to first communication device 1Precoding and a first precoding vector/>, by which to the first communication device 2First signal/>, to first communication device 2Precoding to obtain a first downlink transmission signal/>And transmits the first downlink transmission signal/>, of the second communication apparatus 2To the first communication device 1 and the first communication device 2; by means of which the second communication device 3 is presented with a first precoding vector/>, relative to the first communication device 1First signal/>, to first communication device 1Precoding and a first precoding vector/>, by which to the first communication device 2First signal/>, to first communication device 2Precoding to obtain a first downlink transmission signal/>And transmits the first downlink signal of the second communication device 2To the first communication device 1 and the first communication device 2.

After each first communication device receives the first downlink transmission signals from the second communication devices 1-3, the corresponding first downlink reception signals can be obtained. If the first communication device 1 receives the first downlink transmission signal from the second communication devices 1-3、/>And/>After that, the corresponding first downlink receiving signal can be obtained as/>; The first communication device 2 receives the first downlink transmission signal/>, from the second communication devices 1 to 3、And/>After that, the corresponding first downlink receiving signal can be obtained as。

Each first communication device calculates its corresponding second precoding vector. If the first communication device 1 calculates the corresponding second precoding vector asThe first communication device 2 calculates its corresponding third precoding vector as/>。

S2: UL-1: the first communication apparatus 1 and the first communication apparatus 2 perform precoding on the respective first signals with their second precoding vectors to obtain first uplink transmission signals, for example, the first communication apparatus 1 usesFor its first signal/>Precoding to obtain a first uplink transmission signal/>, of the first communication apparatus 1First communication device 2 use/>For the first signal thereofPrecoding to obtain a first uplink transmission signal/>, of the first communication apparatus 2. The first communication device 1 transmits/>, to the second communication devices 1 to 3The first communication device 2 transmits/>, to the second communication devices 1 to 3。

The second communication device 1 receives the data from the first communication device 1And/>, from the first communication means 2After that, can be according to/>And/>Determining the first uplink received signal/>; The second communication device 2 receives/>, from the first communication device 1And/>, from the first communication means 2After that, can be according to/>AndDetermining the first uplink received signal/>; The second communication device 3 receives/>, from the first communication device 1And/>, from the first communication means 2After that, can be according to/>And/>Determining the first uplink received signal/>。

S3: UL-2: each first communication device constructs a rank 1 matrix by using the corresponding second precoding vector, and then performs precoding on the corresponding first downlink receiving signal by using the rank 1 matrix to obtain a second uplink transmitting signal. As the first communication device 1 uses its corresponding rank 1 matrixFor its corresponding first downlink received signal/>Precoding to obtain a corresponding second uplink transmission signal/>And transmits the corresponding second uplink transmission signal/>, to the second communication devices 1-3; The first communication device 2 uses its corresponding rank 1 matrix/>For its corresponding first downlink received signalPrecoding to obtain a corresponding second uplink transmission signal/>And transmits the corresponding second uplink transmission signal/>, to the second communication devices 1-3。

Each second communication device receives the second uplink transmission signal from the first communication device 1-2And/>Thereafter, a second uplink received signal may be determined from the 2 second uplink transmitted signals. As the second communication device 1 according to/>And/>Obtain the corresponding second uplink received signal/>=; The second communication device 2 according to/>And/>Obtain the corresponding second uplink received signal/>=/>; The second communication means 3 according to/>And/>Obtain the corresponding second uplink received signal/>=。

S4: DL-2: for each first communication device, each second communication device updates its third precoding vector with each first communication device. For the second communication device 1, the second communication device 1 updates its third precoding vector to be the third precoding vector for the first communication device 1The second communication device 1 updates its third precoding vector to the first communication device 2 as; For the second communication device 2, the second communication device 2 updates its third precoding vector to be the third precoding vector for the first communication device 1The second communication device 2 updates its third precoding vector to/>, for the first communication device 2; For the second communication device 3, the second communication device 3 updates its third precoding vector to be the third precoding vector for the first communication device 1The second communication device 3 updates its third precoding vector to the first communication device 2 as。

And after each second communication device precodes the downlink transmission data through a third precoding vector corresponding to each first communication device, the second communication device sends the precoded downlink coherent joint transmission data to each first communication device. As the second communication device 1 uses its third precoding vector for the first communication device 1Precoding the downlink transmission data of the first communication apparatus 1 and transmitting the precoded downlink coherent joint transmission data to the first communication apparatus 1, the second communication apparatus 1 uses its third precoding vector for the first communication apparatus 2Precoding downlink transmission data of the first communication device 2 and transmitting the precoded downlink coherent joint transmission data to the first communication device 2; the second communication device 2 uses its third precoding vector to the first communication device 1Precoding the downlink transmission data of the first communication apparatus 1 and transmitting the precoded downlink coherent joint transmission data to the first communication apparatus 1, the second communication apparatus 2 uses a third precoding vector thereof for the first communication apparatus 2Precoding downlink transmission data of the first communication device 2 and transmitting the precoded downlink coherent joint transmission data to the first communication device 2; the second communication device 3 uses its third precoding vector to the first communication device 1Precoding the downlink transmission data of the first communication apparatus 1 and transmitting the precoded downlink coherent joint transmission data to the first communication apparatus 1, the second communication apparatus 3 uses a third precoding vector thereof for the first communication apparatus 2The downlink transmission data of the first communication apparatus 2 is precoded and the precoded downlink coherent joint transmission data is transmitted to the first communication apparatus 2.

The foregoing describes an embodiment of a method provided by the present application, and in order to facilitate better implementation of the foregoing solutions of the embodiments of the present application, the embodiments of the present application further provide a corresponding apparatus.

The embodiment of the application can divide the functional modules of the communication device according to the method example, for example, each functional module can be divided corresponding to each function, or two or more functions can be integrated in one processing module. The integrated modules may be implemented in hardware or in software functional modules. It should be noted that, in the embodiment of the present application, the division of the modules is schematic, which is merely a logic function division, and other division manners may be implemented in actual implementation.

Referring to fig. 7, fig. 7 is a schematic structural diagram of a communication device according to an embodiment of the present application, where the communication device may be a first communication device or a device (for example, a chip, or a system on a chip, or a circuit) in the first communication device. As shown in fig. 7, the communication device 700 includes at least: a processing unit 701 and a transmitting/receiving unit 702; wherein:

when the communication device 700 is used to implement the functionality of a first communication device:

A processing unit 701, configured to obtain a first downlink received signal, where the first downlink received signal is determined by B first downlink transmission signals from B second communication devices, where one first downlink transmission signal is from one second communication device, the first downlink transmission signal is obtained by precoding the first signal by the second communication device through a first precoding vector, and B is a positive integer greater than or equal to 2;

The processing unit 701 is further configured to determine a second precoding vector and perform precoding on the first signal by using the second precoding vector to obtain a first uplink transmission signal;

a transceiver unit 702, configured to send a first uplink transmission signal to B second communication devices;

the processing unit 701 is further configured to precode the first downlink received signal using a second precoding vector to obtain a second uplink transmission signal;

the transceiver unit 702 is further configured to send a second uplink transmission signal to B second communication devices.

In one embodiment, the transceiver unit 702 is further configured to receive B pieces of downlink coherent joint transmission data of B second communication devices, where one piece of downlink coherent joint transmission data is from one second communication device, the downlink coherent joint transmission data is obtained by precoding downlink transmission data by the second communication device according to a third precoding vector, where the third precoding vector is determined by the second communication device according to a first uplink receiving signal, a second uplink receiving signal and a first signal, where the first uplink receiving signal is determined according to K first uplink sending signals from K first communication devices, and the second uplink receiving signal is determined according to K second uplink sending signals from K first communication devices, and K is a positive integer greater than or equal to 2.

In one embodiment, the processing unit 701 performs precoding on the first downlink received signal using a second precoding vector to obtain a second uplink transmission signal, which is specifically configured to: determining a rank 1 matrix according to the second precoding vector; and precoding the first downlink receiving signal by using the rank 1 matrix to obtain a second uplink transmitting signal.

In one embodiment, a first downlink received signal is associated with a first communication deviceWith the second communication device/>Channel matrix between, second communication device/>For the first communication device/>Is allocated to the first communication device/>One or more of the first signals of (a).

In one embodiment, the first downlink received signal satisfies:

/>

In one embodiment, the processing unit 701 determines a second precoding vector, specifically for: a second precoding vector is determined based on the first downlink received signal and the first signal.

In one embodiment, the second precoding vector satisfies:

In one embodiment, the second precoding vector is associated with the first communication deviceWith the second communication device/>Channel matrix between, second communication device/>For the first communication device/>One or more of the first precoding vectors of (a).

In one embodiment, the second precoding vector satisfies:

In one embodiment, the second uplink transmission signal isWherein/>Representing a rank 1 matrix determined from the second precoding vector,/>Representing the first communication means/>And the first downlink receiving signal is acquired in the first downlink stage.

When the communication device 700 is used to implement the functionality of a second communication device:

A processing unit 701, configured to perform precoding on the first signal by using a first precoding vector to obtain a first downlink transmission signal;

a transceiver unit 702, configured to send first downlink sending signals to K first communication devices, where K is a positive integer greater than or equal to 2;

the transceiver unit 702 is further configured to receive K first uplink transmission signals from K first communication devices, where one first uplink transmission signal is from one first communication device, and the first uplink transmission signal is obtained by precoding a first signal by the first communication device through a second precoding vector;

the processing unit 701 is further configured to determine a first uplink received signal according to the K first uplink transmission signals;

The transceiver unit 702 is further configured to receive K second uplink transmission signals from K first communication devices, where one second uplink transmission signal is from one first communication device, the first uplink transmission signal is obtained by precoding a first downlink reception signal by the first communication device through a second precoding vector, and the first downlink reception signal is determined by the first communication device according to B first downlink transmission signals from B second communication devices;

the processing unit 701 is further configured to:

Determining a second uplink receiving signal according to the K second uplink sending signals;

And obtaining a third precoding vector according to the first uplink receiving signal, the second uplink receiving signal and the first signal.

In an embodiment, the processing unit 701 is further configured to precode downlink transmission data by a third precoding vector;

The transceiver unit 702 is further configured to send the precoded downlink coherent joint transmission data to the K first communication devices.

In one embodiment, a first uplink received signal is associated with a first communication deviceWith the second communication device/>Channel matrix between, first communication device/>First uplink transmission signal, first communication apparatus/>Is allocated to the first communication device/>One or more of the first signals of (a).

In one embodiment, the first uplink received signal satisfies:

In one embodiment, the second uplink received signal and the second precoding vector, the first communication deviceWith the second communication device/>Channel matrix between, second communication device/>For the first communication device/>Is allocated to the first communication device/>One or more of the first signals of (a).

In one embodiment, the second uplink received signal satisfies:

In one embodiment, the third precoding vector is used in conjunction with the second communication deviceFirst uplink received signal acquired in first uplink stage and allocated to first communication device/>First signal, second communication device/>For the first communication device/>First precoding vector of (a), second communication device/>One or more of the second uplink received signals acquired in the second uplink stage.

In one embodiment, the third precoding vector satisfies:

In one embodiment, the third precoding vector second communication deviceFor the first communication device/>First precoding vector, first communication device/>Related to one or more of the second precoding vectors of (a).

In one embodiment, the third precoding vector satisfies:

For more detailed description of the processing unit 701 and the transceiver unit 702, reference may be directly made to the description of the first communication device and the second communication device in the method embodiment shown in fig. 5 and fig. 6, which are not repeated herein.

Referring to fig. 8, fig. 8 is a schematic structural diagram of another communication device according to an embodiment of the application. As shown in fig. 8, the apparatus 800 may include one or more processors 801, where the processor 801 may also be referred to as a processing unit and may implement certain control functions. The processor 801 may be a general purpose processor or a special purpose processor, or the like. For example, a baseband processor or a central processing unit. The baseband processor may be used to process communication protocols and communication data, and the central processor may be used to control communication devices (e.g., base stations, baseband chips, terminals, terminal chips, DUs or CUs, etc.), execute software programs, and process data of the software programs.

In an alternative design, the processor 801 may also store instructions 803 and/or data, where the instructions 803 and/or data may be executed by the processor, such that the apparatus 800 performs the method described in the method embodiments above.

In another alternative design, the processor 801 may include a transceiver unit for implementing the receive and transmit functions. For example, the transceiver unit may be a transceiver circuit, or an interface circuit, or a communication interface. The transceiver circuitry, interface or interface circuitry for implementing the receive and transmit functions may be separate or may be integrated. The transceiver circuit, interface or interface circuit may be used for reading and writing codes/data, or the transceiver circuit, interface or interface circuit may be used for transmitting or transferring signals.

In yet another possible design, apparatus 800 may include circuitry to implement the functions of transmitting or receiving or communicating in the foregoing method embodiments.

Optionally, the apparatus 800 may include one or more memories 802, on which instructions 804 and/or data may be stored, the instructions 804 and/or data being executable on the processor such that the apparatus 800 performs the methods described in the method embodiments above. Optionally, the memory may further store data. In the alternative, the processor may store instructions and/or data. The processor and the memory may be provided separately or may be integrated. For example, the correspondence described in the above method embodiments may be stored in a memory or in a processor.

Optionally, the apparatus 800 may further comprise a transceiver 805 and/or an antenna 806. The processor 801 may be referred to as a processing unit and controls the apparatus 800. The transceiver 805 may be referred to as a transceiver unit, a transceiver circuit, a transceiver device, a transceiver module, or the like, for implementing a transceiver function.

Alternatively, the apparatus 800 in the embodiment of the present application may be used to perform the methods described in fig. 5 and 6 in the embodiment of the present application.

In one embodiment, the communication device 800 may be a first communication device, or may be a device (for example, a chip, or a chip system, or a circuit) in the first communication device, where the processor 801 is configured to perform the operations performed by the processing unit 701 in the foregoing embodiment when the computer program instructions stored in the memory 802 are executed, and the transceiver 805 is configured to perform the operations performed by the transceiver unit 702 in the foregoing embodiment, and the transceiver 805 is further configured to send information to other communication devices other than the communication device. The first communication device or a device in the first communication device may also be used to execute the various methods executed by the first communication device in the embodiments of the methods of fig. 5 and 6, which are not described herein.

In one embodiment, the communication device 800 may be a second communication device, or may be a device (for example, a chip, or a chip system, or a circuit) in the second communication device, where the processor 801 is configured to perform the operations performed by the determining unit 701 in the above embodiment when the computer program instructions stored in the memory 802 are executed, and the transceiver 805 is configured to perform the operations performed by the transceiver unit 702 in the above embodiment, and the transceiver 805 is further configured to receive information from other communication devices other than the communication device. The second communication device or a device in the second communication device may also be used to execute the various methods executed by the second communication device in the embodiments of the methods shown in fig. 5 and fig. 6, which are not described herein.

The processors and transceivers described in this disclosure may be implemented on integrated circuits (INTEGRATED CIRCUIT, IC), analog ICs, radio frequency integrated circuits (radiofrequencyinterfacechip, RFIC), mixed signal ICs, application Specific Integrated Circuits (ASIC), printed circuit boards (printed circuit board, PCB), electronic devices, and the like. The processor and transceiver may also be fabricated using a variety of IC process technologies such as complementary metal oxide semiconductor (complementary metal oxide semiconductor, CMOS), N-type metal oxide semiconductor (NMOS), P-type metal oxide semiconductor (PMOS), bipolar junction transistor (Bipolar Junction Transistor, BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

The apparatus described in the above embodiment may be the first communication device or the second communication device, but the scope of the apparatus described in the present application is not limited thereto, and the structure of the apparatus may not be limited by fig. 8. The apparatus may be a stand-alone device or may be part of a larger device. For example, the device may be:

(1) A stand-alone integrated circuit IC, or chip, or system-on-a-chip or subsystem;

(2) Having a set of one or more ICs, which may optionally also include storage means for storing data and/or instructions;

(3) An ASIC, such as a modem (MSM);

(4) Modules that may be embedded within other devices;

(5) Receivers, terminals, smart terminals, cellular telephones, wireless devices, handsets, mobile units, vehicle devices, network devices, cloud devices, artificial intelligence devices, machine devices, home devices, medical devices, industrial devices, etc.;

(6) Others, and so on.

Referring to fig. 9, fig. 9 is a schematic structural diagram of a first communication device according to an embodiment of the application. For convenience of explanation, fig. 9 shows only main components of the first communication apparatus (terminal device). As shown in fig. 9, the first communication device 900 includes a processor, a memory, a control circuit, an antenna, and an input-output device. The processor is mainly used for processing the communication protocol and the communication data, controlling the whole terminal, executing the software program and processing the data of the software program. The memory is mainly used for storing software programs and data. The radio frequency circuit is mainly used for converting a baseband signal and a radio frequency signal and processing the radio frequency signal. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are mainly used for receiving data input by a user and outputting data to the user.

When the terminal is started, the processor can read the software program in the storage unit, analyze and execute the instructions of the software program and process the data of the software program. When data is required to be transmitted wirelessly, the processor carries out baseband processing on the data to be transmitted and then outputs a baseband signal to the radio frequency circuit, and the radio frequency circuit processes the baseband signal to obtain a radio frequency signal and transmits the radio frequency signal outwards in the form of electromagnetic waves through the antenna. When data is transmitted to the terminal, the radio frequency circuit receives a radio frequency signal through the antenna, the radio frequency signal is further converted into a baseband signal, and the baseband signal is output to the processor, and the processor converts the baseband signal into data and processes the data.

For ease of illustration, fig. 9 shows only one memory and processor. In an actual terminal, there may be multiple processors and memories. The memory may also be referred to as a storage medium or storage device, etc., and embodiments of the present application are not limited in this respect.

As an alternative implementation manner, the processor may include a baseband processor, which is mainly used to process the communication protocol and the communication data, and a central processor, which is mainly used to control the whole terminal, execute a software program, and process the data of the software program. The processor in fig. 9 integrates the functions of a baseband processor and a central processing unit, and those skilled in the art will appreciate that the baseband processor and the central processing unit may be separate processors, interconnected by bus technology, etc. Those skilled in the art will appreciate that a terminal may include multiple baseband processors to accommodate different network formats, and that a terminal may include multiple central processors to enhance its processing capabilities, with various components of the terminal being connectable via various buses. The baseband processor may also be expressed as a baseband processing circuit or a baseband processing chip. The central processing unit may also be expressed as a central processing circuit or a central processing chip. The function of processing the communication protocol and the communication data may be built in the processor, or may be stored in the storage unit in the form of a software program, which is executed by the processor to realize the baseband processing function.

In one example, the antenna and the control circuit having the transmitting/receiving function may be regarded as the transmitting/receiving unit 901 of the first communication apparatus 900, and the processor having the processing function may be regarded as the processing unit 902 of the first communication apparatus 900. As shown in fig. 9, the first communication apparatus 900 includes a transceiver unit 901 and a processing unit 902. The transceiver unit may also be referred to as a transceiver, transceiver device, etc. Alternatively, the device for implementing the receiving function in the transceiver unit 901 may be regarded as a receiving unit, and the device for implementing the transmitting function in the transceiver unit 901 may be regarded as a transmitting unit, that is, the transceiver unit 901 includes a receiving unit and a transmitting unit. For example, the receiving unit may also be referred to as a receiver, a receiving circuit, etc., and the transmitting unit may be referred to as a transmitter, a transmitting circuit, etc. Alternatively, the receiving unit and the transmitting unit may be integrated together, or may be a plurality of independent units. The receiving unit and the transmitting unit may be located in one geographical location or may be distributed among a plurality of geographical locations.

In one embodiment, the processing unit 902 is configured to perform the operations performed by the processing unit 701 in the above embodiment, and the transceiver unit 901 is configured to perform the operations performed by the transceiver unit 702 in the above embodiment. The first communication device 900 may also be used to perform various methods performed by the first communication device in the embodiments of the methods of fig. 5 and 6, which are not described herein.

The embodiment of the present application also provides a computer readable storage medium, on which a computer program is stored, where the program when executed by a processor may implement a procedure related to the first communication device in the method provided in the above method embodiment.

The embodiment of the present application also provides a computer readable storage medium, on which a computer program is stored, where the program when executed by a processor may implement a procedure related to the second communication device in the method provided in the above method embodiment.

Embodiments of the present application also provide a computer program product which, when run on a computer or processor, causes the computer or processor to perform one or more steps of any of the methods described above. The respective constituent modules of the above-mentioned apparatus may be stored in the computer-readable storage medium if implemented in the form of software functional units and sold or used as independent products.

The embodiment of the application also provides a chip system, which comprises at least one processor and a communication interface, wherein the communication interface and the at least one processor are interconnected through a line, and the at least one processor is used for running a computer program or instructions to execute part or all of the steps of any one of the method embodiments corresponding to the above-mentioned fig. 5 and 6. The chip system can be composed of chips, and can also comprise chips and other discrete devices.

The embodiment of the application also discloses a communication system, which comprises a first communication device and a second communication device, and the specific description can refer to the methods shown in fig. 5 and 6.

It should be understood that the memory referred to in embodiments of the present application may be volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile memory may be a hard disk (HARD DISK DRIVE, HDD), a Solid State Disk (SSD), a read-only memory (ROM), a Programmable ROM (PROM), an erasable programmable ROM (erasable PROM, EPROM), an Electrically Erasable Programmable ROM (EEPROM), or a flash memory. The volatile memory may be random access memory (random access memory, RAM) which acts as external cache memory. By way of example, and not limitation, many forms of RAM are available, such as static random access memory (STATIC RAM, SRAM), dynamic random access memory (DYNAMIC RAM, DRAM), synchronous Dynamic Random Access Memory (SDRAM), double data rate synchronous dynamic random access memory (double DATA RATE SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (ENHANCED SDRAM, ESDRAM), synchronous link dynamic random access memory (SYNCHLINK DRAM, SLDRAM), and direct memory bus random access memory (direct rambus RAM, DR RAM). The memory is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to such. The memory in embodiments of the present application may also be circuitry or any other device capable of performing memory functions for storing program instructions and/or data.

It should also be appreciated that the processor referred to in the embodiments of the present application may be a central processing unit (central processing unit, CPU), but may also be other general purpose processors, digital signal processors (DIGITAL SIGNAL processors, DSPs), application Specific Integrated Circuits (ASICs), off-the-shelf programmable gate arrays (field programmable GATE ARRAY, FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, the memory (storage module) is integrated into the processor.

It should be noted that the memory described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

It should be understood that, in various embodiments of the present application, the sequence numbers of the foregoing processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic thereof, and should not constitute any limitation on the implementation process of the embodiments of the present application.

Those of ordinary skill in the art will appreciate that the 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 solution. 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 application.

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

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown 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 may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in 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 this understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk, etc.

The steps in the method of the embodiment of the application can be sequentially adjusted, combined and deleted according to actual needs.

The modules/units in the device of the embodiment of the application can be combined, divided and deleted according to actual needs.

The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.

Claims

1. A communication method, applied to a first communication device, comprising:

Acquiring first downlink receiving signals, wherein the first downlink receiving signals are determined by B first downlink sending signals from B second communication devices, one first downlink sending signal is from one second communication device, the first downlink sending signals are obtained by precoding the first signals through a first precoding vector by the second communication device, and B is a positive integer greater than or equal to 2;

Determining a second precoding vector;

Precoding the first signal through the second precoding vector to obtain a first uplink transmission signal, and transmitting the first uplink transmission signal to the B second communication devices;

And precoding the first downlink receiving signals by using the second precoding vector to obtain second uplink sending signals, and sending the second uplink sending signals to the B second communication devices.

2. The method according to claim 1, wherein the method further comprises:

and receiving B downlink coherent joint transmission data of the B second communication devices, wherein one downlink coherent joint transmission data is from one second communication device, the downlink coherent joint transmission data is obtained by precoding downlink transmission data by the second communication device according to a third precoding vector, the third precoding vector is determined by the second communication device according to a first uplink receiving signal, a second uplink receiving signal and the first signal, the first uplink receiving signal is determined according to K first uplink sending signals from K first communication devices, the second uplink receiving signal is determined according to K second uplink sending signals from K first communication devices, and K is a positive integer greater than or equal to 2.

3. The method of claim 2, wherein precoding the first downlink received signal using the second precoding vector to obtain a second uplink transmitted signal comprises:

Determining a rank 1 matrix according to the second precoding vector;

and precoding the first downlink receiving signal by using the rank 1 matrix to obtain the second uplink sending signal.

4. A method according to claim 3, wherein the first downlink received signal is associated with a first communication deviceWith the second communication device/>Channel matrix between, second communication device/>For the first communication device/>Is allocated to the first communication device/>One or more of the first signals of (a).

5. The method of claim 4, wherein the first downlink received signal satisfies:

Wherein, Representing the first communication means/>First downlink received signal acquired in first downlink stage,/>Representing conjugate transpose operation,/>Representing the first communication means/>With the second communication device/>Channel matrix between,/>Representing the second communication device/>For the first communication device/>First precoding vector,/>Representing allocation to first communication means/>First signal of/>Representing the length of the first signal,/>Representing the first communication means/>The additive white gaussian noise received in the first downlink stage has a mean of 0 and a variance of/>I.e./>。

6. The method of claim 5, wherein the determining the second precoding vector comprises:

And determining the second precoding vector according to the first downlink receiving signal and the first signal.

7. The method of claim 6, wherein the second precoding vector satisfies:

8. The method of claim 1, wherein the second precoding vector is associated with a first communication deviceWith the second communication device/>Channel matrix between, second communication device/>For the first communication device/>One or more of the first precoding vectors of (a).

9. The method of claim 8, wherein the second precoding vector satisfies:

Wherein, Representing the first communication means/>Is a second precoding vector,/>Representing the downlink equivalent channel(s),Representing the first communication means/>With the second communication device/>Channel matrix between,/>Representing conjugate transpose operation,/>Representing the second communication device/>For the first communication device/>First precoding vector,/>The N-dimensional identity matrix is represented, and N represents the number of antennas of the first communication device.

10. The method according to any of claims 3-9, wherein the second uplink transmission signal isWherein/>Represents a rank 1 matrix determined from the second precoding vector,/>Representing the first communication means/>And the first downlink receiving signal is acquired in the first downlink stage.

11. A communication method applied to a second communication device, the method comprising:

Precoding a first signal through a first precoding vector to obtain a first downlink transmission signal, and transmitting the first downlink transmission signal to K first communication devices, wherein K is a positive integer greater than or equal to 2;

Receiving K first uplink transmission signals from K first communication devices, wherein one first uplink transmission signal is from one first communication device, and the first uplink transmission signal is obtained by precoding the first signal through a second precoding vector by the first communication device;

determining a first uplink receiving signal according to the K first uplink sending signals;

Receiving K second uplink transmission signals from the K first communication devices, wherein one second uplink transmission signal is from one first communication device, the first uplink transmission signal is obtained by precoding a first downlink reception signal through a second precoding vector by the first communication device, and the first downlink reception signal is determined by the first communication device according to B first downlink transmission signals from B second communication devices;

12. The method of claim 11, wherein the method further comprises:

Precoding downlink transmission data through a third precoding vector;

And sending the precoded downlink coherent joint transmission data to the K first communication devices.

13. The method of claim 12, wherein the first uplink received signal is associated with a first communication deviceWith the second communication device/>Channel matrix between, first communication device/>First uplink transmission signal, first communication apparatus/>Is allocated to the first communication device/>One or more of the first signals of (a).

14. The method of claim 13, wherein the first uplink received signal satisfies:

Wherein, Representing the second communication device/>A first uplink received signal acquired in a first uplink stage,Representing the first communication means/>With the second communication device/>Upstream equivalent channel between,/>Representing the first communication means/>With the second communication device/>Channel matrix between,/>Representing conjugate transpose operation,/>Representing a first communication deviceIs a second precoding vector,/>Representing allocation to first communication means/>First signal of/>Representing the second communication device/>The average value of the additive Gaussian white noise received in the first uplink stage is 0, and the variance is/>I.e./>。

15. The method of claim 11, wherein the second uplink received signal is combined with the second precoding vector, the first communication deviceWith the second communication device/>Channel matrix between, second communication device/>For the first communication device/>Is allocated to the first communication device/>One or more of the first signals of (a).

16. The method of claim 15, wherein the second uplink received signal satisfies:

17. The method of claim 11, wherein the third precoding vector is used with a second communication deviceFirst uplink received signal acquired in first uplink stage and allocated to first communication device/>First signal, second communication device/>For the first communication device/>First precoding vector of (a), second communication device/>One or more of the second uplink received signals acquired in the second uplink stage.

18. The method of claim 17, wherein the third precoding vector satisfies:

19. The method according to any of claims 11-18, wherein the third precoding vector is a second communication deviceFor the first communication device/>First precoding vector, first communication device/>Related to one or more of the second precoding vectors of (a).

20. The method of claim 19, wherein the third precoding vector satisfies:

Wherein, Representing the second communication device/>For the first communication device/>Third precoding vector,/>Representing allocation to first communication means/>For determining the priority of K first communication devices,/>, for determining the priority of K first communication devicesRepresenting conjugate transpose operation,/>Is a dual variable related to each second communication device power constraint,/>Represents M-dimensional identity matrix, M represents the antenna number of the second communication device,/>Representing the second communication device/>For the first communication device/>First precoding vector,/>Representing the first communication means/>With the second communication device/>Upstream equivalent channel between,/>Representing the first communication means/>With the second communication device/>Channel matrix between,/>Representing the first communication means/>Is used for the second precoding vector of the (c).

21. A communication device comprising means for performing the method of any of claims 1-10; or means for performing the method of any one of claims 11-20.

22. A communication device comprising a processor for executing a computer program or instructions in a memory, which when executed by the processor, causes the device to perform the method of any one of claims 1-10 or to implement the method of any one of claims 11-20.

23. The communication device of claim 22, wherein the communication device further comprises the memory.

24. A computer readable storage medium, having stored therein a computer program or computer instructions which, when executed by a processor, enable a first communication device to perform the method of any one of claims 1-10 or enable a second communication device to perform the method of any one of claims 11-20.

25. A system on a chip comprising at least one processor, a memory, and an interface circuit, wherein the memory, the interface circuit, and the at least one processor are interconnected by a line, and wherein the at least one memory has instructions stored therein; the instructions, when executed by the processor, enable a first communication device to perform the method of any one of claims 1-10 or enable a second communication device to perform the method of any one of claims 11-20.

26. A communication system comprising a first communication device for performing the method of any of claims 1-10 and a second communication device for performing the method of any of claims 11-20.