WO2024045804A1

WO2024045804A1 - Communication method, apparatus and system, storage medium and computer program product

Info

Publication number: WO2024045804A1
Application number: PCT/CN2023/102210
Authority: WO
Inventors: 余健; 许华
Original assignee: 华为技术有限公司
Priority date: 2022-08-30
Filing date: 2023-06-25
Publication date: 2024-03-07
Also published as: CN117674922A

Abstract

The present application relates to the technical field of communications, and provides a communication method, apparatus and system, a storage medium and a computer program product, capable of solving the problem of poor aggregation transmission performance of terminal devices in the prior art. The method comprises: a network device determines a target precoding matrix corresponding to n terminal devices, and sends to the n terminal devices first indication information indicating the target precoding matrix. The target precoding matrix comprises m first precoding elements. Each of the n terminal devices corresponds to k first precoding elements among the m first precoding elements. The value of m is determined according to the sum of the number of antenna ports of the n terminal devices. The value of k is determined according to the number of antenna ports of each terminal device. n is an integer greater than or equal to 2, m is an integer greater than or equal to n, and k is an integer less than m. According to the present application, a configuration process of the precoding matrix of the network device can be optimized, thereby improving the aggregation transmission performance.

Description

Communication methods, devices, systems, storage media and computer program products

This application requests the priority of the Chinese patent application submitted to the State Intellectual Property Office on August 30, 2022, with the application number 202211058329.4 and the application title "Communication methods, devices, systems, storage media and computer program products", and its entire content incorporated herein by reference.

Technical field

The present application relates to the field of communication technology, and in particular, to a communication method, device, system, storage medium and computer program product.

Background technique

In uplink communication, the terminal device can precode the data to be transmitted based on the precoding matrix, thereby realizing uplink data transmission between the terminal device and the network device. Among them, terminal equipment is limited by the problem of low uplink transmission rate and cannot meet high-rate communication services, thus affecting user experience.

In the existing technology, the uplink transmission rate can be increased by aggregating and transmitting uplink data from multiple terminal devices. However, the current codebook used for data transmission is designed based on the scenario of single terminal device transmission and is not suitable for aggregated transmission of multiple terminal devices, so the aggregated transmission performance is poor.

Contents of the invention

The present application provides a communication method, device, system, storage medium and computer program product, which solves the problem of poor performance of codebooks in the prior art during aggregated transmission by terminal equipment.

In order to achieve the above purpose, this application adopts the following technical solutions:

The first aspect provides a communication method. The method can be executed by a network device, or by a component of the network device, such as a processor, a chip, or a chip system of the network device. It can also be executed by a device that can implement all or part of the network. Logic module or software implementation of the device. The following is an example of the method being executed by a network device. The method includes: the network device determines target precoding matrices corresponding to n terminal devices, and sends a first indication for indicating the target precoding matrix to the n terminal devices. information. Among them, n terminal devices are used to transmit the same target transmission block TB, and the target precoding matrix includes m first precoding elements. Each of the n terminal devices corresponds to k first precoding elements among the m first precoding elements. The value of m is determined based on the sum of the number of antenna ports of n terminal devices. The value of k is determined based on the number of antenna ports of each terminal device. n is an integer greater than or equal to 2, m is an integer greater than or equal to n, and k is an integer less than m.

Based on the above technical solution, the network device can determine the target precoding matrices corresponding to n terminal devices, and send the first indication information indicating the target precoding matrix to the n terminal devices. Since the target precoding matrix includes the first precoding element corresponding to each terminal device among the n terminal devices, any terminal device among the n terminal devices can use the corresponding k first precoding elements in the target precoding matrix. The precoding element precodes the target data to enable aggregated transmission. Compared with the existing technology in which network equipment needs to determine the precoding matrix of each terminal device separately, and the terminal device precodes the target data based on its own precoding matrix, the network device in the above technical solution can be n terminal devices. Configuring the same precoding matrix optimizes the precoding matrix configuration process of network equipment and reduces resource overhead. Therefore, it is more suitable for scenarios where multiple terminal devices transmit the same target TB, and improves aggregate transmission performance.

In conjunction with the above first aspect, in a possible implementation manner, the target precoding matrix is a precoding matrix among one or more first precoding matrices included in the first codebook. The k first precoding elements in the first precoding matrix included in the first codebook are determined by adjusting the phases of the k second precoding elements in the second precoding matrix by an integer multiple of the second value. of. The second precoding matrix is a precoding matrix in the second codebook that does not include precoding elements with a value of zero. The second codebook is a codebook used for data transmission by a single terminal device.

In the first codebook constructed through the above technical solution, each first precoding matrix does not include a precoding element with a value of zero, because a precoding element with a value of zero indicates that the corresponding antenna port does not transmit vector signal, therefore removing the precoding matrix including the precoding element with a value of zero can avoid occupying signaling resources in the process of configuring the precoding matrix. At the same time, by adjusting the phase of the second precoding element to an integer multiple of the second value, the phase difference between different terminal devices can be better matched and reduced. The granularity of phase changes between precoding elements, thereby improving the transmission performance of aggregated transmissions.

Combined with the above first aspect, in a possible implementation manner, among the k first precoding elements among the m first precoding elements corresponding to the first terminal device, the phase difference between different first precoding elements is is an integer multiple of the first value. The first terminal device is any one of the n terminal devices. For any terminal device among n terminal devices, the corresponding k first precoding elements are consistent with the characteristic information of the precoding elements in the codebook for a single terminal device, and their phase differences are all It is an integer multiple of the first value, so it is compatible with current communication protocols and has strong versatility.

In conjunction with the above first aspect, in a possible implementation, the phase difference between any first precoding element corresponding to the first terminal device and any first precoding element corresponding to the second terminal device is a second An integer multiple of the value. The second value is smaller than the first value, and the second terminal device is a terminal device other than the first terminal device among the n terminal devices. As a result, the phase granularity between precoding elements corresponding to different terminal devices in the target precoding matrix is smaller than the phase granularity between precoding elements in the codebook used for transmission by a single terminal device. Therefore, compared with the existing technology, The target precoding matrix is more suitable for aggregated transmission of n terminal devices, improving the transmission performance of aggregated transmission.

Combined with the above first aspect, in a possible implementation manner, the value of the first numerical value is The value of the second numerical value is N is an integer greater than 2. As a result, the phase difference between the first precoding matrices corresponding to the same terminal device in this application is It is consistent with the characteristic information of the precoding elements in the codebook currently used for single terminal equipment, so it is compatible with current communication protocols and has strong versatility.

Combined with the above first aspect, in a possible implementation manner, the target precoding matrix does not include precoding elements with a value of zero. Since a precoding element with a value of zero indicates that the corresponding antenna port does not send vector signals, excluding precoding elements with a value of zero in the target precoding matrix can avoid occupying signaling resources in the process of configuring the precoding matrix.

In conjunction with the above first aspect, in a possible implementation manner, the method further includes: the network device sends codebook configuration information to n terminal devices, and the codebook configuration information is used to configure the first codebook for the n terminal devices. In this case, the network device can implement codebook configuration for the n terminal devices during the aggregated transmission process, so as to subsequently configure the precoding matrices in the first codebook for the n terminal devices.

In conjunction with the above first aspect, in a possible implementation, the codebook configuration information includes at least one of a codebook type, a total number of terminal device antenna ports, a port mapping relationship, and a number of transmission layers. The codebook type is used to indicate that the first codebook is used for aggregated transmission. The total number of terminal device antenna ports is the sum of the number of antenna ports of n terminal devices. The port mapping relationship is used to indicate the corresponding relationship between the antenna port of the terminal device and the precoding elements in the precoding matrix. The number of transmission layers is used to indicate the number of transmission layers of the target precoding matrix in the first codebook. In this way, the network device can also configure the target precoding matrix of the terminal device through the number of transmission layers and the first indication information, and configure the first precoding element corresponding to each terminal device through the port mapping relationship.

Combined with the above first aspect, in a possible implementation manner, the number of transmission layers of the target precoding matrix is M, and M is a positive integer. The value of m is M times the sum of the number of antenna ports of n terminal devices. The value of k is M times the number of antenna ports of the corresponding terminal device. In this way, the number of precoding elements corresponding to each terminal device is consistent with the number of precoding elements corresponding to the terminal device when transmitting data from a single terminal device in the existing technology. Therefore, it is compatible with current communication protocols and has strong versatility. .

Combined with the above first aspect, in a possible implementation manner, each of the M transmission layers corresponds to one of the m first precoding elements. first precoding elements; among them, each transmission layer corresponds to The first precoding element includes the the first precoding element. When the precoding matrix includes one or more transmission layers, each transmission layer includes the same number of precoding elements, and the first terminal device may correspond to the first precoding element. In this way, this technical solution can ensure that the number of precoding elements corresponding to each terminal device is It is consistent with the number of precoding elements corresponding to the terminal device when transmitting data from a single terminal device in the prior art. Therefore, it is compatible with current communication protocols and has strong versatility.

Combined with the above first aspect, in a possible implementation, the sum of the number of antenna ports of n terminal devices is R. At this time, the target precoding matrix is a matrix with R rows and M columns, that is, the antenna of the target precoding matrix The number of ports is R and the number of transport layers is M. Each of the R antenna ports of n terminal devices corresponds to the first precoding element of a different row in the target precoding matrix, so that each terminal device can pass its corresponding row or rows of first precoding elements. The element precodes the target data.

In a second aspect, a communication method is provided, which method can be executed by the first terminal device or can be performed by the first terminal device. The components, such as the processor, chip, or chip system of the first terminal device, may also be implemented by logic modules or software that can implement all or part of the first terminal device. The following description takes the method being executed by a first terminal device as an example. The method includes: the first terminal device receiving first indication information from a network device for indicating a target precoding matrix. Because the target precoding matrix includes m first precoding elements. Each terminal device among the n terminal devices corresponds to k first precoding elements among the m first precoding elements. Therefore, the first terminal device can use k corresponding to the first terminal device among the m first precoding elements. The first precoding elements precode the target data corresponding to the target TB, thereby achieving aggregated transmission of n terminal devices. Wherein, the first terminal device is any terminal device among the n terminal devices. n terminal devices are used to transmit the same target transmission block TB. The first indication information is used to indicate the target precoding matrix. The value of m is determined based on the sum of the number of antenna ports of n terminal devices, and the value of k is determined based on the number of antenna ports of each terminal device. n is an integer greater than or equal to 2, m is an integer greater than or equal to n, and k is an integer less than m.

In conjunction with the second aspect above, in a possible implementation, the target precoding matrix is a precoding matrix among one or more first precoding matrices included in the first codebook; the first precoding matrix included in the first codebook The k first precoding elements in the precoding matrix are determined by adjusting the phases of the k second precoding elements in the second precoding matrix by an integer multiple of the second value; the second precoding matrix is the second The precoding matrix in the codebook does not include precoding elements with a value of zero; the second codebook is a codebook used for data transmission by a single terminal device.

Combined with the above second aspect, in a possible implementation manner, among the k first precoding elements among the m first precoding elements corresponding to the first terminal device, the phase difference between different first precoding elements is is an integer multiple of the first value.

In conjunction with the above second aspect, in a possible implementation, the phase difference between any first precoding element corresponding to the first terminal device and any first precoding element corresponding to the second terminal device is a second an integer multiple of the value; the second value is smaller than the first value, and the second terminal device is a terminal device other than the first terminal device among the n terminal devices.

Combined with the above second aspect, in a possible implementation manner, the value of the first numerical value is The value of the second numerical value is N is an integer greater than 2.

Combined with the above second aspect, in a possible implementation manner, the target precoding matrix does not include precoding elements with a value of zero.

In conjunction with the second aspect above, in a possible implementation, the method further includes: the first terminal device receiving codebook configuration information from the network device, and the codebook configuration information is used to configure the first codebook for n terminal devices .

In conjunction with the second aspect above, in a possible implementation, the codebook configuration information includes at least one of the codebook type of the first codebook, the total number of terminal device antenna ports, port mapping relationships, and the number of transmission layers; wherein, The codebook type of the first codebook is used to indicate that the first codebook is used for aggregated transmission; the total number of terminal equipment antenna ports is the sum of the number of antenna ports of n terminal equipment; the port mapping relationship is used to indicate the number of antenna ports of the terminal equipment and the predetermined Correspondence between precoding elements in the coding matrix; the number of transmission layers is used to indicate the number of transmission layers of the target precoding matrix in the first codebook.

Combined with the above second aspect, in a possible implementation manner, the codebook configuration information includes the number of transmission layers and port mapping relationships. The method further includes: the first terminal device determines a target precoding matrix according to the number of transmission layers and the first indication information, and determines k first precoding elements corresponding to the first terminal device from the target precoding matrix according to the port mapping relationship.

Combined with the second aspect above, in a possible implementation, the number of transmission layers of the target precoding matrix is M, and M is a positive integer; the value of m is M times the sum of the number of antenna ports of n terminal devices; The value of k is M times the number of antenna ports of the corresponding terminal device.

Combined with the above second aspect, in a possible implementation manner, each of the M transmission layers corresponds to one of the m first precoding elements. first precoding elements; among them, each transmission layer corresponds to The first precoding element includes the the first precoding element.

Combined with the second aspect above, in a possible implementation, the sum of the number of antenna ports of n terminal devices is R; the target precoding matrix is a matrix with R rows and M columns; among the R antenna ports of n terminal devices Each antenna port corresponds to the first precoding element of a different row in the target precoding matrix.

In a third aspect, a communication device is provided for implementing the various methods mentioned above. The communication device may be the network device in the above-mentioned first aspect, or a device including the above-mentioned network device, or a device included in the above-mentioned network device, such as a chip. The communication device includes corresponding modules, units, or means (means) that implement the method described in the first aspect, and the modules, units, Or means can be implemented by hardware, software, or by hardware executing the corresponding software implementation. The hardware or software includes one or more modules or units corresponding to the above functions.

In a possible implementation, the communication device includes: a communication unit and a processing unit; a processing unit used to determine target precoding matrices corresponding to n terminal devices; n terminal devices used to transmit the same target transmission block TB ; The target precoding matrix includes m first precoding elements; each of the n terminal devices corresponds to k first precoding elements among the m first precoding elements; the value of m is based on n The sum of the number of antenna ports of the terminal equipment is determined, and the value of k is determined according to the number of antenna ports of each terminal equipment; n is an integer greater than or equal to 2, m is an integer greater than or equal to n, and k is an integer less than m; The communication unit is configured to send first indication information to n terminal devices; the first indication information is used to indicate the target precoding matrix.

Combined with the above third aspect, in a possible implementation manner, the target precoding matrix is a precoding matrix among one or more first precoding matrices included in the first codebook; the first precoding matrix included in the first codebook The k first precoding elements in the precoding matrix are determined by adjusting the phases of the k second precoding elements in the second precoding matrix by an integer multiple of the second value; the second precoding matrix is the second The precoding matrix in the codebook does not include precoding elements with a value of zero; the second codebook is a codebook used for data transmission by a single terminal device.

Combined with the above third aspect, in a possible implementation manner, among the k first precoding elements among the m first precoding elements corresponding to the first terminal device, the phase difference between different first precoding elements is is an integer multiple of the first value; the first terminal device is any one of the n terminal devices.

In conjunction with the above third aspect, in a possible implementation, the phase difference between any first precoding element corresponding to the first terminal device and any first precoding element corresponding to the second terminal device is a second an integer multiple of the value; the second value is smaller than the first value, and the second terminal device is a terminal device other than the first terminal device among the n terminal devices.

Combined with the above third aspect, in a possible implementation manner, the value of the first numerical value is The value of the second numerical value is N is an integer greater than 2.

Combined with the above third aspect, in a possible implementation manner, the target precoding matrix does not include precoding elements with a value of zero.

Combined with the above third aspect, in a possible implementation manner, the communication unit is also used to: send codebook configuration information to n terminal devices, and the codebook configuration information is used to configure the first codebook for the n terminal devices.

Combined with the above third aspect, in a possible implementation, the codebook configuration information includes at least one of a codebook type, a total number of terminal device antenna ports, a port mapping relationship, and a number of transmission layers; wherein, the codebook type is used for Indicates that the first codebook is used for aggregate transmission; the total number of terminal equipment antenna ports is the sum of the number of antenna ports of n terminal equipment; the port mapping relationship is used to indicate the corresponding relationship between the antenna ports of the terminal equipment and the precoding elements in the precoding matrix ;The number of transmission layers is used to indicate the number of transmission layers of the target precoding matrix in the first codebook.

Combined with the above third aspect, in a possible implementation, the number of transmission layers of the target precoding matrix is M, and M is a positive integer; the value of m is M times the sum of the number of antenna ports of n terminal devices; The value of k is M times the number of antenna ports of the corresponding terminal device.

Combined with the above third aspect, in a possible implementation manner, each of the M transmission layers corresponds to one of the m first precoding elements. first precoding elements; among them, each transmission layer corresponds to The first precoding element includes the the first precoding element.

Combined with the third aspect above, in a possible implementation, the sum of the number of antenna ports of n terminal devices is R; the target precoding matrix is a matrix with R rows and M columns; among the R antenna ports of n terminal devices Each antenna port corresponds to the first precoding element of a different row in the target precoding matrix.

In a fourth aspect, a communication device is provided for implementing the various methods mentioned above. The communication device may be the first terminal device in the second aspect, or a device including the first terminal device, or a device included in the first terminal device, such as a chip. The communication device includes corresponding modules, units, or means (means) that implement the method described in the second aspect. The modules, units, or means can be implemented by hardware, software, or by hardware executing corresponding software. The hardware or software includes one or more modules or units corresponding to the above functions.

In a possible implementation, the terminal device includes: a communication unit and a processing unit; the communication unit is used to receive the first instruction information from the network device; the first terminal device is any terminal device among n terminal devices ;n terminal devices Used to transmit the same target transmission block TB; the first indication information is used to indicate the target precoding matrix; the target precoding matrix includes m first precoding elements; each terminal device among the n terminal devices corresponds to the mth k first precoding elements in a precoding element; the value of m is determined based on the sum of the number of antenna ports of n terminal devices, and the value of k is determined based on the number of antenna ports of each terminal device; n is greater than or An integer equal to 2, m is an integer greater than or equal to n, and k is an integer less than m; the processing unit is used to perform target processing according to the k first precoding elements corresponding to the first terminal device among the m first precoding elements. The target data corresponding to TB is precoded.

In conjunction with the fourth aspect, in a possible implementation, the target precoding matrix is a precoding matrix among one or more first precoding matrices included in the first codebook; the first precoding matrix included in the first codebook The k first precoding elements in the precoding matrix are determined by adjusting the phases of the k second precoding elements in the second precoding matrix by an integer multiple of the second value; the second precoding matrix is the second The precoding matrix in the codebook does not include precoding elements with a value of zero; the second codebook is a codebook used for data transmission by a single terminal device.

Combined with the above fourth aspect, in a possible implementation manner, among the k first precoding elements among the m first precoding elements corresponding to the first terminal device, the phase difference between different first precoding elements is is an integer multiple of the first value.

In conjunction with the fourth aspect, in a possible implementation, the phase difference between any first precoding element corresponding to the first terminal device and any first precoding element corresponding to the second terminal device is a second an integer multiple of the value; the second value is smaller than the first value, and the second terminal device is a terminal device other than the first terminal device among the n terminal devices.

Combined with the fourth aspect above, in a possible implementation manner, the value of the first numerical value is The value of the second numerical value is N is an integer greater than 2.

Combined with the above fourth aspect, in a possible implementation manner, the target precoding matrix does not include precoding elements with a value of zero.

In conjunction with the fourth aspect, in a possible implementation, the communication unit is also configured to receive codebook configuration information from the network device, and the codebook configuration information is used to configure the first codebook for n terminal devices.

In conjunction with the fourth aspect, in a possible implementation, the codebook configuration information includes at least one of the codebook type of the first codebook, the total number of terminal device antenna ports, port mapping relationships, and the number of transmission layers; wherein, The codebook type of the first codebook is used to indicate that the first codebook is used for aggregated transmission; the total number of terminal equipment antenna ports is the sum of the number of antenna ports of n terminal equipment; the port mapping relationship is used to indicate the number of antenna ports of the terminal equipment and the predetermined Correspondence between precoding elements in the coding matrix; the number of transmission layers is used to indicate the number of transmission layers of the target precoding matrix in the first codebook.

Combined with the above fourth aspect, in a possible implementation, the codebook configuration information includes the number of transmission layers and port mapping relationship; the processing unit is also configured to: determine the target precoding matrix according to the number of transmission layers and the first indication information and The k first precoding elements corresponding to the first terminal device are determined from the target precoding matrix according to the port mapping relationship.

Combined with the fourth aspect above, in a possible implementation, the number of transmission layers of the target precoding matrix is M, and M is a positive integer; the value of m is M times the sum of the number of antenna ports of n terminal devices; The value of k is M times the number of antenna ports of the corresponding terminal device.

Combined with the above fourth aspect, in a possible implementation manner, each of the M transmission layers corresponds to one of the m first precoding elements. first precoding elements; among them, each transmission layer corresponds to The first precoding element includes the the first precoding element.

Combined with the fourth aspect above, in a possible implementation manner, the sum of the number of antenna ports of n terminal devices is R; the target precoding matrix is a matrix with R rows and M columns; among the R antenna ports of n terminal devices Each antenna port corresponds to the first precoding element of a different row in the target precoding matrix.

In a fifth aspect, a communication device is provided, including: a processor, the processor is coupled to a memory, and the processor is used to execute a computer program stored in the memory, so that the communication device executes any of the first aspect or the second aspect. One possible implementation is the method described. The communication device may be the network device in the first aspect, or a device including the network device, or a device included in the network device; or the communication device may be the first terminal device in the second aspect. , or a device including the above-mentioned first terminal device, or a device included in the above-mentioned first terminal device, such as a chip.

In conjunction with the fifth aspect, in a possible implementation manner, the communication device may further include a transceiver. The transceiver can be a transceiver circuit or an interface circuit. The transceiver can be used for the communication device described in the fifth aspect to communicate with other communication devices.

In a sixth aspect, a computer-readable storage medium is provided. The computer-readable storage medium stores computer programs or instructions. When the computer program or instructions are run on a computer, the computer is caused to execute the method described in any possible implementation manner of the first aspect or the second aspect.

A seventh aspect provides a computer program product. The computer program product includes: a computer program or instructions. When the computer program or instructions are run on a computer, the computer executes the method described in any possible implementation manner of the first aspect or the second aspect.

In an eighth aspect, the present application provides a communication system, including: a network device and a plurality of terminal devices, wherein the network device is configured to perform the communication method described in the first aspect and any possible implementation of the first aspect. , the terminal device is configured to perform the communication method described in the second aspect and any possible implementation manner of the second aspect.

For the description of the second to eighth aspects in this application, reference may be made to the detailed description of the first aspect; and, for the beneficial effects described in the second to eighth aspects, reference may be made to the analysis of the beneficial effects of the first aspect. Herein No further details will be given.

Description of drawings

Figure 1 is a system architecture diagram of a communication system provided by an embodiment of the present application;

Figure 2 is a schematic diagram of an aggregated transmission scenario provided by an embodiment of the present application;

Figure 3 is a schematic flow chart of a communication method provided by an embodiment of the present application;

Figure 4 is a schematic flow chart of another communication method provided by an embodiment of the present application;

Figure 5 is a schematic structural diagram of a network device provided by an embodiment of the present application;

Figure 6 is a schematic structural diagram of a first terminal device provided by an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a communication device provided by an embodiment of the present application.

Detailed ways

In the description of this application, unless otherwise stated, "/" means that the related objects are in an "or" relationship. For example, A/B can mean A or B; "and/or" in this application only means It is an association relationship that describes associated objects. It means that there can be three relationships. For example, A and/or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. Among them, A and B Can be singular or plural.

In the description of this application, unless otherwise stated, "plurality" means two or more than two. "At least one of the following" or similar expressions thereof refers to any combination of these items, including any combination of a single item (items) or a plurality of items (items). For example, at least one of a, b, or c can mean: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, c can be single or multiple .

In addition, in order to facilitate a clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, words such as “first” and “second” are used to distinguish identical or similar items with basically the same functions and effects. Those skilled in the art can understand that words such as "first" and "second" do not limit the number and execution order, and words such as "first" and "second" do not limit the number and execution order.

In the embodiments of this application, words such as "exemplary" or "for example" are used to represent examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "such as" in the embodiments of the present application is not to be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete manner that is easier to understand.

It will be understood that reference throughout this specification to "an embodiment" means that a particular feature, structure, or characteristic associated with the embodiment is included in at least one embodiment of the present application. Therefore, various embodiments are not necessarily referred to the same embodiment throughout this specification. Furthermore, the particular features, structures or characteristics may be combined in any suitable manner in one or more embodiments. It can be understood that in the various embodiments of the present application, the size of the sequence numbers of each process does not mean the order of execution. The execution order of each process should be determined by its functions and internal logic, and should not be determined by the execution order of the embodiments of the present application. The implementation process constitutes no limitation.

It can be understood that in this application, "... when" and "if" both refer to corresponding processing under certain objective circumstances. They do not limit the time, and do not require judgment actions during implementation, nor do they require means there are other limitations.

It can be understood that some optional features in the embodiments of the present application, in certain scenarios, can be implemented independently without relying on other features, such as the solutions they are currently based on, to solve corresponding technical problems and achieve corresponding effects. , and can also be combined with other features according to needs in certain scenarios. Correspondingly, the devices provided in the embodiments of the present application can also implement these features or functions, which will not be described again here.

In this application, unless otherwise specified, the same or similar parts between various embodiments may be referred to each other. In the various embodiments of this application and the various implementation methods/implementation methods/implementation methods in each embodiment, if there are no special instructions or logical conflicts, the differences between different embodiments and the various implementation methods/implementation methods in each embodiment will be different. The terminology and/or descriptions between implementation methods/implementation methods are consistent and can be referenced to each other. Different embodiments, as well as the technical features in each implementation method/implementation method/implementation method in each embodiment are based on their inherent Logical relationships can be combined to form new embodiments, implementations, implementation methods, or implementation methods. The embodiments of the present application described below do not constitute a limitation on the protection scope of the present application.

In the following, nouns involved in the embodiments of this application are explained to facilitate readers' understanding.

(1) Coherent superposition

Coherent superposition refers to the superposition of multiple vector signals in the same direction at the receiving end. The stronger the coherence, the stronger the signal power after superposition of multiple vector signals received by the receiving end. On the contrary, the weaker the coherence, the weaker the signal power after superposition of multiple vector signals received by the receiving end. Coherent transmission refers to a transmission method in which multiple signals sent by one or more terminal devices are coherently superimposed and transmitted to network devices.

(2) Aggregation transmission

Aggregated transmission refers to one or more terminal devices assisting another terminal device in transmitting service data, that is, assisting the source terminal device to send service data to the network device through the antenna port of the cooperating terminal device, thereby enhancing the transmission power of the service data as a whole. Improve transmission performance. Among them, aggregated transmission includes non-coherent joint transmission (NCJT) and coherent joint transmission (CJT). In the non-coherent joint transmission mode, multiple terminal devices can encode, scramble, modulate, layer map, and precode different transmission blocks, and send the processed data through the antenna port. In the coherent joint transmission mode, multiple terminal devices can encode, scramble, modulate, layer map, and precode the same transmission block, and send the processed data through the antenna port. Coherent joint transmission can also be called coherent transmission.

The technical solutions provided by the embodiments of the present application are introduced below.

In a wireless communication system, communication can be divided into different types according to the types of sending nodes and receiving nodes. The network device sending information to the terminal device or user equipment (UE) can be called downlink (DL) communication. The terminal device or UE sending information to the network device may be called uplink (UL) communication.

For example, in the fourth generation (4G) and fifth generation (5G) wireless communication systems, that is, new radio access technology (NR) systems, in uplink communication, Measure the uplink channel quality by sounding reference signal (SRS). In downlink communication, the downlink channel quality can be measured through the channel state information reference signal (CSI-RS).

Currently, in the uplink transmission of 5G NR, codebook-based transmission mode and non-codebook-based transmission mode can be used on the physical uplink shared channel (PUSCH). For codebook transmission, the network device can send a transmitted precoding matrix indicator (TPMI) to the terminal device. The TPMI is used to indicate a precoding matrix in the codebook. The terminal device performs precoding processing on the data to be transmitted according to the precoding matrix, thereby achieving uplink communication. For non-codebook transmission, the network device sends a sounding reference signal resource index (SRS resource indicator, SRI) to the terminal device. The SRI corresponds to a non-quantized precoding matrix.

In uplink communication, the terminal device can precode the data to be transmitted based on the precoding matrix, thereby realizing uplink data transmission between the terminal device and the network device. Among them, terminal equipment at the edge of the cell is limited by the problem of low uplink transmission rate, so it cannot meet high-speed communication services (such as high-definition video backhaul services), thus affecting user experience.

In the existing technology, the uplink transmission rate can be increased by aggregating and transmitting uplink data from multiple terminal devices. However, the current codebook used for data transmission is designed based on the scenario of single terminal device transmission, and has poor performance when used for aggregated transmission of multiple terminal devices.

In view of this, the network device in this application can determine a target precoding matrix for aggregated transmission by multiple terminal devices, and send indication information indicating the target precoding matrix to the multiple terminal devices. Since the target precoding matrix includes precoding elements corresponding to each terminal device, the terminal device can precode the data to be transmitted according to the corresponding precoding elements in the target precoding matrix, thereby achieving aggregated transmission. Compared with the existing technology in which network equipment needs to determine the precoding matrix of each terminal device separately, and the terminal device precodes the data to be transmitted based on its own precoding matrix, this application optimizes the configuration of the precoding matrix of the network device. process, reducing resource overhead.

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

Figure 1 is an architectural diagram of a communication system 10 provided by an embodiment of the present application. As shown in FIG. 1 , the communication system 10 includes: multiple terminal devices 101 and network devices 102 .

Among them, the network device 102 is connected to multiple terminal devices 101 through communication links. Multiple terminal devices 101 are connected through communication links. The communication link may be a wired communication link or a wireless communication link, which is not limited in this application.

For example, a device-to-device (D2D) link can be established between terminal devices 101. One way is through a wired connection. Another method is to communicate via sidelinks or side links.

The technical solutions of the embodiments of the present application can be applied to various communication systems 10, such as: code division multiple access (CDMA), time division multiple access (time division multiple access, TDMA), frequency division multiple access (frequency division) multiple access (FDMA), orthogonal frequency-division multiple access (OFDMA), single carrier frequency-division multiple access (single carrier FDMA, SC-FDMA) and other systems. The term "system" is interchangeable with "network". The CDMA system can implement wireless technologies such as universal terrestrial radio access (UTRA) and CDMA2000. UTRA may include wideband CDMA (wideband CDMA, WCDMA) technology and other CDMA variant technologies. CDMA2000 can cover the interim standard (IS) 2000 (IS-2000), IS-95 and IS-856 standards. TDMA systems can implement wireless technologies such as global system for mobile communication (GSM). The OFDMA system can implement technologies such as evolved universal wireless terrestrial access (evolved UTRA, E-UTRA), ultra mobile broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash OFDMA and other wireless technologies. UTRA and E-UTRA are UMTS and UMTS evolved versions. 3GPP's long term evolution (LTE) and various versions based on LTE evolution are new versions of UMTS using E-UTRA. The communication system 10 may also be a 5G communication system or a new radio (NR). In addition, the communication system 10 can also be applied to future-oriented communication technologies, all of which are applicable to the technical solutions provided by the embodiments of this application.

Terminal device 101 is a device with wireless communication functions that can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted. It can also be deployed on water (such as ships, etc.). It can also be deployed in the air (such as on airplanes, balloons, satellites, etc.). Terminal equipment 101 is also called user equipment (UE), mobile station (MS), mobile terminal equipment (mobile terminal, MT), terminal equipment, etc. It is a device that provides voice and/or data to users. Connectivity devices. For example, the terminal device 101 includes a handheld device, a vehicle-mounted device, etc. with a wireless connection function. Currently, the terminal device 101 can be: a mobile phone (mobile phone), a tablet computer, a notebook computer, a handheld computer, a mobile internet device (mobile internet device, MID), a wearable device (such as a smart watch, a smart bracelet, a pedometer, etc. ), vehicle-mounted equipment (such as cars, bicycles, electric vehicles, airplanes, ships, trains, high-speed rail, etc.), virtual reality (VR) equipment, augmented reality (AR) equipment, industrial control (industrial control) Wireless terminal equipment in wireless terminal equipment, smart home equipment (such as refrigerators, TVs, air conditioners, electricity meters, etc.), intelligent robots, workshop equipment, wireless terminal equipment in self-driving (self driving), remote medical surgery (remote medical surgery) Wireless terminal equipment, wireless terminal equipment in smart grid, wireless terminal equipment in transportation safety, wireless terminal equipment in smart city, or wireless terminal equipment in smart home Terminal equipment, flight equipment (for example, intelligent robots, hot air balloons, drones, airplanes), etc. In one possible application scenario of this application, the terminal device is a terminal device that often works on the ground, such as a vehicle-mounted device. In this application, for convenience of description, chips deployed in the above devices, such as system-on-a-chip (SOC), baseband chips, etc., or other chips with communication functions can also be called terminal devices.

The terminal device 101 may be a vehicle with corresponding communication functions, or a vehicle-mounted communication device, or other embedded communication device, or it may be a user handheld communication device, including a mobile phone, a tablet computer, etc.

As an example, in this embodiment of the present application, the terminal device 101 may also be a wearable device. Wearable devices can also be called wearable smart devices. It is a general term for applying wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes, etc. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not just hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. Broadly defined wearable smart devices include full-featured, large-sized devices that can achieve complete or partial functions without relying on smartphones, such as smart watches or smart glasses, and those that only focus on a certain type of application function and need to cooperate with other devices such as smartphones. Use, such as various types of smart bracelets, smart jewelry, etc. for physical sign monitoring.

The network device 102 is a device located on the access network side of the above-mentioned communication system and has a wireless transceiver function or can be installed on the device. equipment chips or chip systems. The network device 102 includes but is not limited to: access point (AP) in the WiFi system, such as home gateway, router, server, switch, bridge, etc., evolved NodeB (eNB), wireless network control Radio network controller (RNC), NodeB (NB), base station controller (BSC), base transceiver station (BTS), home base station (e.g., home evolved NodeB, or home NodeB, HNB), base band unit (BBU), wireless relay node, wireless backhaul node, transmission point (transmission and reception point, TRP or transmission point, TP), etc. It can also be a 5G base station, such as A gNB in a new radio (NR) system, or a transmission point (TRP or TP), one or a group (including multiple antenna panels) of antenna panels of a base station in a 5G system, or may also constitute a gNB Or network nodes at transmission points, such as baseband units (BBU), distributed units (DU), road side units (RSU) with base station functions, or 5G radio access networks (NG radio access network, NG-Ran) equipment, etc. The network device 102 also includes base stations in different networking modes, such as a master base station (master evolved NodeB, MeNB) and a secondary base station (secondary eNB, SeNB, or secondary gNB, SgNB). Network equipment 102 also includes different types, such as ground base stations, air base stations, satellite base stations, etc.

The technical solution provided by this application is applied to the aggregation transmission process of multiple terminal devices 101, wherein the multiple terminal devices 101 include source user equipment (source user equipment, SUE) and one or more cooperative user equipment (cooperative user equipment). user equipment, CUE).

The SUE is the terminal device 101 that needs to send data to be transmitted to the network device 102. CUE is a terminal device 101 that assists SUE in data aggregation transmission.

The SUEs in multiple terminal devices 101 are used to send data to be transmitted to the CUE. Correspondingly, CUEs in multiple terminal devices 101 are used to receive data to be transmitted from SUEs.

For example, the SUE may send the data to be transmitted to the CUE through unicast, multicast or broadcast. For details, please refer to related technologies and will not be described in detail here.

In practical applications, the SUE can send all transport blocks (TB) in the data to be transmitted to the CUE. When multiple terminal devices 101 perform aggregate transmission, they send the same target TB to the network device 102 to achieve the desired transmission. Aggregated transmission of data. The SUE can also continuously send TBs of the data to be transmitted to the CUE. When multiple terminal devices 101 perform aggregated transmission, they send the same target TB to the network device 102 to achieve aggregated transmission of the data to be transmitted.

For example, as shown in Figure 2, phase calibration is also performed between the SUE and the CUE to ensure that signals transmitted from the same TB can achieve coherent superposition when they arrive at the network device. The phase calibration process can refer to related technologies and will not be described in detail here.

The network device 102 is used to send codebook configuration information to multiple terminal devices 101. Correspondingly, multiple terminal devices 101 receive codebook configuration information from the network device 102.

The codebook configuration information is used to configure the first codebook for multiple terminal devices 101. Multiple terminal devices 101 are used to transmit the same target transmission block TB. The first codebook is a codebook used to aggregate transmission data.

For example, the codebook configuration information can be carried in radio resource control (radio resource control, RRC) signaling configuration information.

In a possible implementation, the codebook configuration information includes at least one of a codebook type, a total number of terminal device antenna ports, a port mapping relationship, and a number of transmission layers.

The codebook type is used to indicate that the first codebook is used for aggregated transmission. For example, the codebook type may be characterized by the "codebookSubset" field. When the value of "codebookSubset" is "CJT" or "Full coherent", this codebook type indicates that the first codebook is used for aggregate transmission.

The total number of terminal device antenna ports is the sum of the number of antenna ports of multiple terminal devices 101. For example, multiple terminal devices 101 include one SUE and one CUE, where the number of antenna ports of the SUE is 2 and the number of antenna ports of the CUE is 2. At this time, the total number of antenna ports of the terminal equipment is the sum of the number of antenna ports of SUE and CUE, which is 4. That is to say, when SUE and CUE perform aggregated transmission, they can be equivalent to a terminal device with 4 antenna ports for data transmission.

The port mapping relationship is used to indicate the corresponding relationship between the antenna ports of the terminal device 101 and the precoding elements in the precoding matrix. Based on the above example, multiple terminal devices 101 include one SUE and one CUE, where the number of antenna ports of the SUE is 2 and the number of antenna ports of the CUE is 2. Each transport layer in the precoding matrix includes 4 precoding elements. The port mapping relationship may be that the first antenna port in the SUE corresponds to the first precoding element in each transmission layer, and the second antenna port corresponds to the third precoding element in each transmission layer. The first antenna port in CUE corresponds to the second antenna port in each transmission layer. Precoding element, the second antenna port corresponds to the fourth precoding element in each transmission layer. The specific mapping relationship can be set according to the actual situation, and this application does not limit this.

The number of transmission layers is used to indicate the number of transmission layers of the target precoding matrix in the first codebook. The number of transmission layers (layer) is also called transmission order or transmission rank. The number of transmission layers is less than or equal to the total number of antenna ports of the terminal device.

The network device 102 is also used to determine target precoding matrices corresponding to multiple terminal devices 101.

The target precoding matrix is a precoding matrix among one or more first precoding matrices included in the first codebook, and the target precoding matrix includes precoding elements corresponding to each terminal device 101 in the plurality of terminal devices 101 .

In a possible implementation, the number of precoding elements corresponding to the terminal device 101 may be determined by the number of antenna ports and the number of transmission layers of the terminal device 101. For example, the number of precoding elements corresponding to the terminal device 101 is equal to the product of the number of antenna ports of the terminal device 101 and the number of transmission layers.

For example, if the number of transmission layers of the target precoding matrix is 2, and the number of antenna ports of the terminal device 101 is 2, then the number of precoding elements corresponding to the terminal device 101 is 4.

In a possible implementation, the network device 102 may determine the target precoding matrix based on uplink channel measurements. For details, please refer to related technologies and will not be described in detail here.

The network device 102 is also configured to send the first indication information to multiple terminal devices 101. Correspondingly, multiple terminal devices 101 are configured to receive the first indication information from the network device 102.

The first indication information is used to indicate the target precoding matrix. The first indication information may be carried in downlink control information (DCI). For example, the first indication information may be the transmitted precoding matrix indicator (TPMI) field in DCI. The TPMI field is an index indicating the precoding matrix and corresponds one-to-one to the precoding matrix in the codebook. The codebook set may be pre-configured in the terminal device 101 and the network device 102.

Taking a codebook with 2 antenna ports and 1 transmission layer as an example, the corresponding relationship between the codebook and the TPMI field is shown in Table 1 below:

Table 1

Among them, when the value of TPMI is 0, the corresponding precoding matrix is When the value of TPMI is 1, the corresponding precoding matrix is When the value of TPMI is 2, the corresponding precoding matrix is When the value of TPMI is 3, the corresponding precoding matrix is When the value of TPMI is 4, the corresponding precoding matrix is When the value of TPMI is 5, the corresponding precoding matrix is

Taking a codebook with 2 antenna ports and 2 transmission layers as an example, the corresponding relationship between the codebook and the TPMI field is shown in Table 2 below:

Table 2

Among them, when the value of TPMI is 0, the corresponding precoding matrix is When the value of TPMI is 1, the corresponding precoding matrix is When the value of TPMI is 2, the corresponding precoding matrix is

For example, the first indication information may also include a port mapping relationship. For example, the corresponding relationship between the antenna ports of the terminal equipment for multiple aggregate transmissions and the precoding elements in the target precoding is indicated through the SRI information included in the first indication information. Based on the above example, multiple terminal devices 101 include one SUE and one CUE, where the number of antenna ports of the SUE is 2 and the number of antenna ports of the CUE is 2. Each transport layer in the precoding matrix includes 4 precoding elements. The SRI index 1 indicated in the first indication information indicates the SRS resources corresponding to the antenna port of the SUE, and the SRI index 2 indicates the SRS resources corresponding to the antenna port of the CUE. source.

Among them, the port mapping relationship can be that the first antenna port in SRI index 1 corresponds to the first precoding element in each transmission layer, and the second antenna port corresponds to the third precoding element in each transmission layer. element. The first antenna port in SRI index 2 corresponds to the second precoding element in each transmission layer, and the second antenna port corresponds to the fourth precoding element in each transmission layer.

That is to say, the port mapping relationship can be carried in the codebook configuration information or in the first indication information. This application does not limit this.

Multiple terminal devices 101 are also configured to precode target data corresponding to the target TB according to corresponding precoding elements in the target precoding matrix.

For example, the target data may be coded, scrambled, modulated, and layer-mapped data of the target TB. The terminal device 101 can determine the target precoding matrix according to the first indication information and the number of transmission layers, and determine the corresponding precoding element from the target precoding matrix according to the port mapping relationship, thereby precoding the target data according to the precoding element. coding. It can be understood that this is only an exemplary description, and the terminal device 101 can also determine the corresponding precoding element in the target precoding matrix in other ways, such as preconfiguring each terminal device 102 with the precoding element in the precoding matrix. Correspondence between encoding elements.

Multiple terminal devices 101 are also used to send precoded target data to the network device 102 . Correspondingly, the network device 102 receives precoded target data from multiple terminal devices 101 .

For example, multiple terminal devices 101 can transmit data through a physical uplink shared channel (PUSCH). PUSCH is used to transmit the target TB.

It should be pointed out that the embodiments of the present application can learn from or refer to each other. For example, the same or similar steps, method embodiments, system embodiments and device embodiments can all be referred to each other without limitation.

Figure 3 is a flow chart of a communication method provided by an embodiment of the present application. As shown in Figure 3, the method includes the following steps:

Step 301: The network device determines target precoding matrices corresponding to n terminal devices.

Among them, n terminal devices are used to transmit the same target transmission block TB. The target precoding matrix includes m first precoding elements. Each of the n terminal devices corresponds to k first precoding elements among the m first precoding elements. n is an integer greater than or equal to 2, m is an integer greater than or equal to n, and k is an integer less than m.

For example, the n terminal devices include SUE and one or more CUE. SUE is a terminal device that needs to send data to be transmitted to the network device. CUE is a terminal device that assists SUE in data aggregation and transmission.

In a possible implementation, the value of m is determined based on the sum of the number of antenna ports of n terminal devices, and the value of k is determined based on the number of antenna ports of each terminal device. That is to say, the number k of first precoding elements corresponding to different terminal devices may be the same or different. The number m of first precoding elements included in the target precoding matrix is the sum of the number of first precoding elements corresponding to each of the n terminal devices.

In a possible implementation manner, the number of transmission layers of the target precoding matrix is M, and M is a positive integer. The value of m is M times the sum of the number of antenna ports of n terminal devices. The value of k is M times the number of antenna ports of the corresponding terminal device.

Each of the M transmission layers corresponds to one of the m first precoding elements. the first precoding element. Each transport layer corresponds to The first precoding element includes the the first precoding element.

For example, the number of transmission layers of the target precoding matrix is 2, the n terminal devices include terminal device 1 and terminal device 2, the number of antenna ports of terminal device 1 is 2, and the number of antenna ports of terminal device 2 is 2.

At this time, the target precoding matrix can be expressed as:

Among them, α is a normalization parameter used to balance the signal output power. The number of transmission layers M of the target precoding matrix is 2, including 8 first precoding elements. Each transport layer corresponds to 4 first precoding elements. Precoding element A, precoding element B, precoding element C and precoding element D are the first precoding elements in the first transmission layer in the target precoding matrix. The precoding element E, the precoding element F, the precoding element G and the precoding element H are the first precoding elements in the second transmission layer in the target precoding matrix.

The above precoding element A is only used to represent the first precoding element in the first transmission layer of the target precoding matrix, and the precoding element B is only used to represent the second precoding element in the first transmission layer of the target precoding matrix. precoded elements, and so on. The above notation does not limit the numerical value of the precoding element. The same is true in subsequent examples and will not be repeated.

The first precoding element corresponding to the terminal device 1 in the first transmission layer may be precoding element A and precoding element B, and the first precoding element corresponding to the terminal device 1 in the second transmission layer may be precoding Element E and precoding element F. The first precoding element corresponding to the terminal device 2 in the first transmission layer may be precoding element C and precoding element D, and the first precoding element corresponding to the terminal device 2 in the second transmission layer may be precoding Element G and precoding element H.

For another example, the first precoding element corresponding to the terminal device 1 in the first transmission layer may be precoding element A and precoding element C, and the first precoding element corresponding to the terminal device 1 in the second transmission layer may be are precoding element E and precoding element G. The first precoding element corresponding to the terminal device 2 in the first transmission layer may be precoding element B and precoding element D, and the first precoding element corresponding to the terminal device 2 in the second transmission layer may be precoding Element F and precoding element H.

In a possible implementation, the sum of the number of antenna ports of n terminal devices is R. The target precoding matrix is a matrix with R rows and M columns. Each of the R antenna ports of the n terminal devices corresponds to the first precoding element of a different row in the target precoding matrix.

Based on the above example, the first antenna port of the terminal device 1 corresponds to the precoding element A and the precoding element E, and the second antenna port of the terminal device 1 corresponds to the precoding element B and the precoding element F. The first antenna port of the terminal device 2 corresponds to the precoding element C and the precoding element G, and the second antenna port of the terminal device 2 corresponds to the precoding element D and the precoding element H.

For another example, the first antenna port of the terminal device 1 corresponds to the precoding element A and the precoding element E, and the second antenna port of the terminal device 1 corresponds to the precoding element C and the precoding element G. The first antenna port of the terminal device 2 corresponds to the precoding element B and the precoding element F, and the second antenna port of the terminal device 2 corresponds to the precoding element D and the precoding element H.

It can be understood that this is only an exemplary description, and the corresponding relationship between the terminal device and the first precoding element in the target precoding matrix can be set according to the actual situation, for example, through the identification information of the antenna port of the terminal device and the precoding element. The mapping relationship of encoding elements represents the correspondence relationship. This application does not limit this.

In a possible implementation, the network device can determine the target precoding matrix based on uplink channel measurement. For example, the network device measures the uplink channel status based on the reference signals fed back by n terminal devices, and determines the target precoding matrix based on the uplink channel status. For details, please refer to related technologies and will not be described in detail here.

Step 302: The network device sends the first instruction information to n terminal devices. Correspondingly, n terminal devices receive the first indication information from the network device.

The first indication information is used to indicate the target precoding matrix.

Taking any terminal device among n terminal devices as an example, the above step 302 can be expressed as: the first terminal device receives the first indication information from the network device.

Wherein, the first terminal device is any terminal device among the n terminal devices.

In a possible implementation, the first indication information may be carried in DCI. For example, the first indication information may be the TPMI field in DCI. The TPMI field is an index indicating the precoding matrix and corresponds one-to-one to the precoding matrix in the codebook.

For example, each precoding matrix has a corresponding precoding number, that is, bit field mapped to index. The corresponding relationship between the precoding number and the TPMI field is as shown in Table 3 below:

table 3

Among them, when the number of transmission layers is 1 and the value of TPMI is 0, the precoding number of the corresponding precoding matrix is 0. When the number of transmission layers is 1 and the value of TPMI is 1, the precoding number of the corresponding precoding matrix is 1, and so on.

In a possible implementation manner, the first indication information may also include a port mapping relationship. For example, the corresponding relationship between the antenna ports of the terminal equipment for multiple aggregate transmissions and the precoding elements in the target precoding is indicated through the SRI information included in the first indication information.

For example, n terminal devices include terminal device 1 and terminal device 2, where the number of antenna ports of terminal device 1 is 2 and the number of antenna ports of terminal device 2 is 2. Each transport layer in the target precoding matrix includes 4 first precoding elements. The SRI index 1 indicated in the first indication information indicates the SRS resource corresponding to the antenna port of the terminal device 1, and the SRI index 2 indicates the SRS resource corresponding to the antenna port of the terminal device 2.

In addition, the port mapping relationship can also be carried in the codebook configuration information. For related content, please refer to the description in step 401 below, which will not be described again here.

Step 303: For each terminal device among the n terminal devices, each terminal device precodes the target data corresponding to the target TB according to the k first precoding elements corresponding to the terminal device among the m first precoding elements. .

Taking any terminal device among the n terminal devices as an example, the above step 303 can be expressed as: the first terminal device performs calculation on the target TB according to the k first precoding elements corresponding to the first terminal device among the m first precoding elements. Perform precoding.

Wherein, the first terminal device is any terminal device among the n terminal devices. The target data can be the data after encoding, scrambling, modulation, and layer mapping of the target TB.

In a possible implementation, the first terminal device may determine the corresponding precoding element from the target precoding matrix, and precode the target data according to the precoding element.

The corresponding relationship between each terminal device and the precoding elements in the target precoding matrix can be indicated by the network device, or can be pre-configured and determined, which is not limited in this application.

For example, the precoded target TB satisfies the following formula 1:

Wherein, W is a sub-matrix in the target precoding matrix, and the sub-matrix in the target precoding matrix is composed of k first precoding elements corresponding to the first terminal device. y ⁽⁰⁾ (i)...y ^(υ-1) (i) is the target data, υ is the number of transmission layers, is the precoded target data, p ₀ ... p _ρ-1 respectively corresponds to the antenna port of the first terminal device, and ρ is the number of antenna ports of the first terminal device.

Based on the above technical solution, the network device in this application can determine the target precoding matrices corresponding to n terminal devices and provide The n terminal devices send first indication information indicating the target precoding matrix. Since the target precoding matrix includes the first precoding element corresponding to each terminal device among the n terminal devices, any terminal device among the n terminal devices can perform the coding according to the corresponding first precoding element in the target precoding matrix. The element precodes the target data for aggregated transmission. Compared with the existing technology in which network equipment needs to determine the precoding matrix of each terminal device separately, and the terminal device precodes the target data based on its own precoding matrix, this application optimizes the configuration of the precoding matrix of the network device. process, reducing resource overhead.

Furthermore, in order to ensure the coherent superposition effect of multiple terminal devices during aggregated transmission, thereby improving aggregated transmission performance, embodiments of the present application provide a first codebook for aggregated transmission data.

As a possible embodiment, the target precoding matrix is a precoding matrix among one or more first precoding matrices included in the first codebook.

Wherein, the k first precoding elements in the first precoding matrix included in the first codebook are obtained by adjusting the phases of the k second precoding elements in the second precoding matrix by an integer multiple of the second value. definite. The second precoding matrix is a precoding matrix in the second codebook that does not include precoding elements with a value of zero. The second codebook is a codebook used for data transmission by a single terminal device.

That is to say, the first precoding elements in the first precoding matrix are obtained by phase-adjusting the second precoding elements in the second precoding matrix.

For example, the codebook type may be characterized by the "codebookSubset" field. When the value of "codebookSubset" is "CJT" or "Full coherent", it indicates that the first codebook is used for aggregated transmission.

In a possible implementation, the second codebook may be a codebook used for data transmission by a single terminal device in various current communication systems, or may be a codebook used for data transmission by a single terminal device in a future-oriented communication system. , this application does not limit this.

For example, the second codebook may be applicable to terminal devices with different numbers of antenna ports. For example, if the number of antenna ports is 4, the number of transmission layers is 1, and transform precoding is enabled, the second codebook can be as shown in Table 4 below:

Table 4

Among them, when the value of TPMI is 0, the corresponding precoding matrix is When the value of TPMI is 1, the corresponding precoding matrix is And so on.

The second codebook with the number of antenna ports being 4, the number of transmission layers being 1 and disabling transform precoding can be as shown in Table 5 below:

table 5

The second codebook with 4 antenna ports, 2 transmission layers and disabled transform precoding can be as shown in Table 6 below:

Table 6

The second codebook with 4 antenna ports, 3 transmission layers and disabled transform precoding can be as shown in Table 7 below:

Table 7

The second codebook with 4 antenna ports, 4 transmission layers and disabled transform precoding can be as shown in Table 8 below:

Table 8

Among them, when the value of TPMI is 0, the corresponding precoding matrix is When the value of TPMI is 1, it corresponds to precoding The matrix is And so on.

The second codebook may also be a codebook with 2 antenna ports in the above Table 1 or Table 2, which will not be listed here.

It can be seen from the codebook in the above table that in a codebook with an antenna port number of 2, for a precoding matrix that does not include precoding elements with a value of 0, the precoding elements in each transmission layer satisfy the following Formula 2:
[A,B] ^T = [1,e ^jφ ] ^T formula 2

Among them, the value of precoding element A is 1, which can also be expressed as e ^j0 , and the value of precoding element B is e ^jφ , φ represents the phase difference between the two precoding elements, and the value can be 0 degrees or 90 degrees. 180 degrees (π), and 270 degrees

In a codebook with an antenna port number of 4, for a precoding matrix that does not include precoding elements with a value of 0, the following formula 3 is satisfied between the precoding elements in each transmission layer:
[A,B,C,D] ^T =[1,e ^jφ ,e ^jθ ,e ^jφ ,e ^jθ ] ^T formula 3

Among them, the value of precoding element A is 1, which can also be expressed as e ^j0 , the value of precoding element B is e ^jφ , the value of precoding element C is e ^jθ , and the value of precoding element D is e ^jφ , e ^jθ . φ represents the phase difference between precoding element A and precoding element B, and the value can be 0 degrees or 90 degrees. 180 degrees (π), and 270 degrees θ represents the phase difference between precoding element A and precoding element B. The value can be 0 degrees or 90 degrees. 180 degrees (π), and 270 degrees

In a possible implementation, when the phase differences are 360 degrees, 450 degrees, 540 degrees and 630 degrees, they are equivalent to 0 degrees, 90 degrees, 180 degrees and 270 degrees respectively. That is to say, when the phase difference is greater than or equal to 360 degrees, it can be converted to a value within 360 degrees.

It can be seen from the above that for the second codebook currently used for single terminal device data transmission, in the precoding matrix that does not include precoding elements with a value of 0, the phase difference between the precoding elements is an integer of the first value times. However, when the second codebook is applied to the aggregated transmission of n terminal devices, each terminal device corresponds to some precoding elements in the precoding matrix of the second codebook, and the phase difference between these precoding elements will usually be Greater than an integer multiple of the first value. This will cause the phase change granularity between precoding elements to be too coarse, making the coherent superposition effect of n terminal devices worse, thus affecting aggregate transmission.

In this application, a second precoding matrix that does not include precoding elements with a value of zero can be determined from the second codebook, and the phase of the second precoding element in the second precoding matrix is adjusted by a second value. is an integer multiple of , thereby obtaining the first precoding matrix.

The second value is smaller than the first value. As a result, in the precoding matrix of the first codebook provided by this application, the phase change granularity between the first precoding elements corresponding to different terminal devices is finer. Therefore, this application The first codebook provided in the application can compensate for the phase difference between terminal devices, improve the coherent superposition performance of n terminal devices, and is more suitable for aggregate transmission scenarios.

As a possible implementation, for the target precoding matrix, among the k first precoding elements among the m first precoding elements corresponding to the first terminal device, the phase difference between different first precoding elements can be is an integer multiple of the first value.

On this basis, the phase difference between any first precoding element corresponding to the first terminal device and any first precoding element corresponding to the second terminal device may be an integer multiple of the second value.

Wherein, the second value is smaller than the first value, and the second terminal device is a terminal device other than the first terminal device among the n terminal devices.

For example, the value of the above first numerical value can be The value of the above second numerical value can be N is an integer greater than 2.

In addition, for a precoding matrix including a precoding element with a value of 0 in the second codebook, it is also not applicable to aggregated transmission. Aggregation transmission is mainly to coherently superpose signals on each antenna of the terminal device, thereby improving data transmission performance. However, when the value of the precoding element is 0, it means that the antenna port corresponding to the precoding element does not send vector signals, and the antenna gain will be lost. Therefore, a precoding matrix including a precoding element with a value of 0 will occupy signaling resources in the precoding matrix configuration process and affect the transmission performance of aggregated transmission.

For example, the corresponding relationship between the precoding number and the TPMI field of the second codebook with the number of antenna ports being 4 is as shown in Table 9 below:

Table 9

Among them, when the codebook type of the second codebook is complete, partial, or irrelevant, that is, when the value of "codebookSubset" is "fullyAndPartialAndNonCoherent", the precoding matrix includes 62, corresponding to precoding numbers 0-61 respectively. When the codebook type of the second codebook is partial and irrelevant, that is, when the value of "codebookSubset" is "partialAndNonCoherent", the precoding matrix includes 32, corresponding to precoding numbers 0-31. When the codebook type of the second codebook is irrelevant, that is, when the value of "codebookSubset" is "nonCoherent", the precoding matrix includes 12, corresponding to precoding numbers 0-11 respectively.

It can be seen from the above that for the codebook of data transmitted by a single terminal device, the maximum length of the TPMI field is 6 bits, corresponding to the precoding matrix with precoding numbers 0-61 and two reserved bits. At the same time, there are many precoding matrices including precoding elements with a value of 0. For example, in Table 1, the number of antenna ports is 2 and the number of transmission layers is 1. The codebook includes two precoding matrices containing 0 elements. The number of antenna ports in Table 2 is 2, and the codebook with a transmission layer number of 2 includes a precoding matrix containing 0 elements. Table 4 The number of antenna ports in is 4, and the codebook with a transmission layer number of 1 includes 12 precoding matrices containing 0 elements. Precoding matrices containing 0 elements also exist in codebooks with other antenna port numbers, and will not be listed one by one here.

In a possible implementation manner, the target precoding matrix does not include precoding elements with a value of zero. In other words, each first precoding matrix in the first codebook does not include a precoding element with a value of zero.

In this way, this application can avoid the precoding matrix containing 0 elements from occupying signaling resources in the precoding matrix configuration process. When the TPMI field is certain, the first precoding matrix corresponding to different terminal devices can be reduced by adjusting the phase. Encodes the granularity of phase changes between elements. Compared with the codebook used for single terminal device data transmission, the first codebook provided by this application can not only avoid increasing signaling resource overhead, but also improve the transmission performance of aggregated transmission.

In a possible implementation, through the above solution, the present application can realize the construction of a first codebook with a number of antenna ports equal to the number of antenna ports of the second codebook and a construction of a third codebook with a number of antenna ports greater than the number of antenna ports of the second codebook. A codebook. Discuss the following situations:

Case 1: Construct a first codebook with the number of antenna ports equal to the number of antenna ports of the second codebook.

Wherein, the number of antenna ports of the first codebook and the number of antenna ports of the second codebook are both the sum of the number of antenna ports of n terminal devices. Both the first precoding matrix and the second precoding matrix include m precoding elements. The first precoding matrix is a precoding matrix in the first codebook, and the second precoding matrix is a precoding matrix in the second codebook that does not include precoding elements with a value of zero. The number of transmission layers of the first codebook is the same as the number of transmission layers of the second codebook.

One terminal device among the n terminal devices corresponds to k first precoding elements in the first precoding matrix. One terminal device among the n terminal devices also corresponds to k second precoding elements in the second precoding matrix. Different terminal devices correspond to different first precoding elements, and different terminal devices correspond to different second precoding elements.

For example, the number of antenna ports in the first codebook and the second codebook is 4, and the number of transmission layers is 1. The n terminal devices include terminal device 1 and terminal device 2. The number of antenna ports of terminal device 1 is 2, and the number of antenna ports of terminal device 2 is 2. The first precoding matrix can be expressed as:

Among them, α is a normalization parameter, precoding element A is the first precoding element in the first precoding matrix, precoding element B is the second precoding element in the first precoding matrix, and the precoding element C is the third precoding element in the first precoding matrix, and precoding element D is the fourth precoding element in the first precoding matrix.

The second precoding matrix can be expressed as:

Among them, α′ is a normalization parameter, precoding element A′ is the first precoding element in the second precoding matrix, and precoding element B′ is the second precoding element in the second precoding matrix. The precoding element C′ is the third precoding element in the second precoding matrix, and the precoding element D′ is the fourth precoding element in the second precoding matrix.

The terminal device 1 may correspond to the precoding element A and the precoding element C in the first precoding matrix, and the terminal device 1 may also correspond to the precoding element A' and precoding element C' in the second precoding matrix. The terminal device 2 may correspond to the precoding element B and the precoding element D in the first precoding matrix, and the terminal device 2 may also correspond to the precoding element B' and the precoding element D' in the second precoding matrix.

It can be understood that this is only an exemplary description. The corresponding relationship between the terminal device and the precoding element can be set according to the actual situation. It only needs to ensure that the first precoding element corresponding to different terminal devices is different, and the corresponding second precoding element is different. The precoding elements only need to be different, and this application does not limit this.

In a possible implementation, for each terminal device, this application can adjust the phases of the k second precoding elements in the second precoding matrix corresponding to the terminal device by an integer multiple of the second value to obtain the The k first precoding elements in the first precoding matrix corresponding to the device.

Combined with the above example, the first precoding element in the first precoding matrix satisfies the following formula 4:

Among them, the values of θ ₁ and θ ₂ are integer multiples of the second value, and θ ₁ and θ ₂ can be the same value or different values.

For example, taking the above Table 5 as the second codebook as an example, the first precoding matrix constructed through the above method is as shown in the following Table 10:

Table 10

Wherein, when the second precoding element in the second precoding matrix is [1,1,1,1] ^T , the second value is When , the first precoding matrix can be constructed in the following way:

When θ ₁ is 0 degrees and θ ₂ is 0 degrees, it can be obtained from the above formula 4 that the first precoding element in the first precoding matrix is [1,1,1,1] ^T . That is, the precoding element corresponding to row 1 and column 1 in Table 10.

When θ ₁ is 0 degrees, θ ₂ is When , it can be obtained from the above formula 4 that the first precoding element in the first precoding matrix is That is, the precoding element corresponding to row 1 and column 2 in Table 10.

When θ ₁ is 0 degrees, θ ₂ is degree, it can be obtained from the above formula 4 that the first precoding element in the first precoding matrix is [1,j,1,j] ^T . That is, the precoding element corresponding to row 1 and column 3 in Table 10. Since the phase difference between the second precoding elements in the second codebook is the first value (i.e. ), the first precoding element determined at this time also exists in the second codebook.

When θ ₁ is 0 degrees, θ ₂ is When the degree is high, it can be obtained from the above formula 4 that the first precoding element in the first precoding matrix is That is, the precoding element corresponding to row 1 and column 4 in Table 10.

When the second precoding element in the second precoding matrix is [1,1,j,j] ^T , the second value is When , the first precoding matrix can be constructed in the following way:

When θ ₁ is 0 degrees and θ ₂ is 0 degrees, it can be obtained from the above formula 4 that the first precoding element in the first precoding matrix is [1,1,j,j] ^T . That is, the precoding element corresponding to row 1 and column 5 in Table 10.

When θ ₁ is 0 degrees, θ ₂ is When , it can be obtained from the above formula 4 that the first precoding element in the first precoding matrix is That is, the precoding element corresponding to row 1 and column 6 in Table 10.

When θ ₁ is 0 degrees, θ ₂ is When the degree is high, it can be obtained from the above formula 4 that the first precoding element in the first precoding matrix is [1,j,j,-1] ^T . That is, the precoding element corresponding to row 1 and column 7 in Table 10. Since the phase difference between the second precoding elements in the second codebook is the first value (i.e. ), the first precoding element determined at this time also exists in the second codebook.

When θ ₁ is 0 degrees, θ ₂ is When the degree is high, it can be obtained from the above formula 4 that the first precoding element in the first precoding matrix is That is, the precoding element corresponding to row 1 and column 8 in Table 10.

By analogy, this application can construct a first codebook whose number of antenna ports is equal to the number of antenna ports of the second codebook. Among them, the second value (for example, in the above example, the second value is ) is less than the first value (for example, in the above example, the first value is ), the first codebook determined based on the above scheme includes 16 precoding matrices in the second codebook that do not include a value of 0 (refer to the above Table 4) and 16 newly constructed precoding matrices. At this time, the first codebook constructed by this application includes 32 first precoding matrices,

Obviously, the phase change granularity of the precoding matrix in the first codebook is finer, and the values of the first precoding elements in the first codebook are not 0, so it is more suitable for aggregated transmission.

For example, for a precoding matrix with 4 antenna ports and 2 transmission layers, the first precoding element in the first precoding matrix satisfies the following formula 5:

Wherein, precoding element A is the first precoding element in the first transmission layer of the first precoding matrix, and precoding element B is the second precoding element in the first transmission layer of the first precoding matrix. Coding element, precoding element C is the 3rd precoding element in the 1st transmission layer in the first precoding matrix, and precoding element D is the 4th precoding element in the 1st transmission layer in the first precoding matrix precoded elements. The precoding element E is the first precoding element in the second transmission layer of the first precoding matrix, and the precoding element F is the second precoding element in the second transmission layer of the first precoding matrix. , the precoding element G is the third precoding element in the second transmission layer in the first precoding matrix, and the precoding element H is the fourth precoding element in the second transmission layer in the first precoding matrix. Encoding elements.

Similarly, the precoding element A' is the first precoding element in the first transmission layer of the second precoding matrix, and so on, which will not be described again.

The terminal device 1 may correspond to the precoding element A, the precoding element C, the precoding element E, and the precoding element G in the first precoding matrix. The terminal device 1 may also correspond to the precoding element in the second precoding matrix. A', precoding element C' and precoding element E', precoding element G'. The terminal device 2 may correspond to the precoding element B, the precoding element D, the precoding element F, and the precoding element H in the first precoding matrix, and the terminal device 2 may also correspond to the precoding element in the second precoding matrix. B', precoding element D' and precoding element F', precoding element H'.

For the construction method of the first codebook where the number of antenna ports is 4 and the number of transmission layers is 2, please refer to the above example where the number of transmission layers is 1, which will not be described again here.

In a possible implementation manner, the present application can also construct a first codebook with transmission layers 3 and 4 in the above manner. Among them, for the first codebook with 4 antenna ports, the number of precoding matrices and TPMI fields corresponding to different numbers of transmission layers are shown in Table 11 below:

Table 11

Among them, the TPMI field of the first codebook provided by this application occupies 6 bits, and the TPMI field in the second codebook is also 6 bits. Therefore, the first codebook provided by this application can avoid increasing signaling resource overhead. , which can also improve the transmission efficiency of aggregated transmission. Lose performance.

Case 2: Construct a first codebook whose number of antenna ports is greater than the number of antenna ports of the second codebook.

Wherein, the number of antenna ports of the first codebook is the sum of the number of antenna ports of n terminal devices. The number of antenna ports of the second codebook is smaller than the number of antenna ports of the first codebook. The first precoding matrix includes m first precoding elements. The second precoding matrix includes m' second precoding elements. The first precoding matrix is a precoding matrix in the first codebook, and the second precoding matrix is a precoding matrix in the second codebook that does not include precoding elements with a value of zero. The number of transmission layers of the first codebook is the same as the number of transmission layers of the second codebook. The number m' of precoding elements in the second precoding matrix is less than the number m of precoding elements in the first precoding matrix, and is greater than or equal to the number of antenna ports of any one of the n terminal devices.

One terminal device among the n terminal devices corresponds to k first precoding elements in the first precoding matrix. One terminal device among the n terminal devices also corresponds to k second precoding elements in the second precoding matrix. The first precoding elements corresponding to different terminal devices are different, but the same precoding elements may exist in the second precoding elements corresponding to different terminal devices.

For example, the number of antenna ports in the first codebook is 4, the number of antenna ports in the second codebook is 2, and the number of transmission layers is 1. The n terminal devices include terminal device 1 and terminal device 2. The number of antenna ports of terminal device 1 is 2, and the number of antenna ports of terminal device 2 is 2. The first precoding matrix can be expressed as:

The second precoding matrix can be expressed as:

Wherein, α′ is a normalization parameter, precoding element A′ is the first precoding element in the second precoding matrix, and precoding element B′ is the second precoding element in the second precoding matrix.

The terminal device 1 may correspond to the precoding element A and the precoding element B in the first precoding matrix, and the terminal device 1 may also correspond to the precoding element A' and the precoding element B' in the second precoding matrix. The terminal device 2 may correspond to the precoding element C and the precoding element D in the first precoding matrix, and the terminal device 2 may also correspond to the precoding element A' and precoding element B' in the second precoding matrix.

It can be understood that this is only an exemplary description, and the corresponding relationship between the terminal device and the precoding element can be set according to the actual situation, and this application does not limit this.

Combined with the above example, the first precoding element in the first precoding matrix satisfies the following formula 6:

For example, the second precoding element in the second precoding matrix is [1,1] ^T and the second value is

When θ ₁ is 0 degrees and θ ₂ is 0 degrees, it can be obtained from the above formula 6 that the first precoding element in the first precoding matrix is [1,1,1,1] ^T .

When θ ₁ is 0 degrees, θ ₂ is When , it can be obtained from the above formula 6 that the first precoding element in the first precoding matrix is

When θ ₁ is 0 degrees, θ ₂ is degree, it can be obtained from the above formula 6 that the first precoding element in the first precoding matrix is [1,1,j,j] ^T .

When θ ₁ is 0 degrees, θ ₂ is When the degree is high, it can be obtained from the above formula 6 that the first precoding element in the first precoding matrix is

By analogy, this application can construct a first codebook with a larger number of antenna ports than that of the second codebook. Among them, the second value (for example, in the above example, the second value is ) is less than the first value (for example, in the above example, the first value is ). therefore, The first codebook provided in Case 2 of this application can also avoid increasing signaling resource overhead, and can also improve the transmission performance of aggregated transmission.

The above solution is also applicable to the case where the number of transmission layers is 2. The number of precoding matrices and TPMI field information in the constructed first codebook can be referred to the above scenario 1. The relevant description can be referred to the above content and will not be repeated here.

The following describes the process of the network device configuring the first codebook for n terminal devices.

As a possible embodiment of the present application, as shown in Figure 4 in conjunction with Figure 3, the method also includes the following step 401.

Step 401: The network device sends codebook configuration information to n terminal devices. Correspondingly, n terminal devices receive codebook configuration information from the network device.

The codebook configuration information is used to configure the first codebook for n terminal devices.

Taking any terminal device among n terminal devices as an example, the above step 401 can be expressed as: the first terminal device receives the first indication information from the network device.

In a possible implementation manner, the codebook configuration information includes at least one of the codebook type of the first codebook, the total number of antenna ports of the terminal device, the port mapping relationship, and the number of transmission layers.

The total number of terminal device antenna ports is the sum of the number of antenna ports of n terminal devices. For example, n terminal devices include one terminal device 1 and one terminal device 2. The number of antenna ports of terminal device 1 is 2 and the number of antenna ports of terminal device 2 is 2. At this time, the total number of antenna ports of the terminal device is the sum of the number of antenna ports of terminal device 1 and terminal device 2, which is 4. That is to say, when terminal equipment 1 and terminal equipment 2 perform aggregate transmission, they can be equivalent to terminal equipment with 4 antenna ports for data transmission.

The port mapping relationship is used to indicate the corresponding relationship between the antenna port of the terminal device and the precoding elements in the precoding matrix. Based on the above example, the terminal device includes a terminal device 1 and a terminal device 2, where the number of antenna ports of terminal device 1 is 2 and the number of antenna ports of terminal device 2 is 2. The precoding matrix includes precoding element 1, precoding element 2, precoding element 3 and precoding element 4. The port mapping relationship may be that the antenna ports in terminal device 1 correspond to precoding element 1 and precoding element 3 respectively, and the antenna ports in terminal device 2 correspond to precoding element 2 and precoding element 4 respectively. The specific mapping relationship can be set according to the actual situation, and this application does not limit this.

For example, codebook configuration information may be carried in RRC signaling configuration information.

As a possible implementation manner, when the codebook configuration information includes the number of transmission layers, the first terminal device may determine the target precoding matrix according to the number of transmission layers and the first indication information. When the codebook configuration information includes a port mapping relationship, the first terminal device may determine k first precoding elements corresponding to the first terminal device from the target precoding matrix according to the port mapping relationship.

In this way, the network device can configure the corresponding relationship between each terminal device and the precoding elements in the target precoding matrix through the codebook configuration information. The corresponding relationship can also be pre-configured in the terminal device and the network device.

In a possible implementation, this application does not limit the execution order of step 401 and the above-mentioned step 301. Step 401 can be executed before the above-mentioned step 301 or after step 301. Figure 4 only shows step 401 after step 301. The previous execution is taken as an example to illustrate the communication method provided by this application.

Based on the above technical solution, in this application, the network device can send codebook configuration information to n terminal devices, thereby configuring the first codebook for the n terminal devices during aggregated transmission. The codebook configuration information may also include parameter information about port mapping relationships and the number of transmission layers. In this case, the network device may also configure the corresponding relationship between the terminal device and the precoding elements in the precoding matrix.

It can be understood that in the above embodiments, the methods and/or steps implemented by the network device can also be implemented by components (such as chips or circuits) that can be used in the network device; the methods and/or steps implemented by the terminal device, It can also be implemented by components (such as chips or circuits) that can be used in terminal devices.

The above mainly introduces the solution provided by the embodiment of the present application from the perspective of interaction between various network elements. Correspondingly, embodiments of the present application also provide a communication device, which is used to implement the above various methods. The communication device can implement the above method The terminal equipment in the embodiment, or a device including the above-mentioned terminal equipment, or a component that can be used for the terminal equipment; or the communication device can be the network device in the above-mentioned method embodiment, or a device including the above-mentioned network equipment, or be Components available for network equipment. It can be understood that, in order to implement the above functions, the communication device includes corresponding hardware structures and/or software modules for performing each function. Persons skilled in the art should easily realize that, with the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is performed by hardware or computer software driving the hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each specific application, but such implementations should not be considered beyond the scope of this application.

Embodiments of the present application can divide the communication device into functional modules according to the above method embodiments. For example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or software function modules. In a possible implementation manner, the division of modules in the embodiment of the present application is schematic and is only a logical function division. In actual implementation, there may be other division methods.

For example, taking the communication device as the network device in the above method embodiment, FIG. 5 shows a schematic structural diagram of a network device 50 . The network device 50 includes a processing unit 501 and a communication unit 502. The communication unit 502, which may also be called a transceiver unit, is used to implement transceiver functions, and may be, for example, a transceiver circuit, a transceiver, a transceiver, or a communication interface.

Among them, the processing unit 501 is used to determine the target precoding matrix corresponding to n terminal devices; the n terminal devices are used to transmit the same target transmission block TB; the target precoding matrix includes m first precoding elements; n Each of the terminal devices corresponds to k first precoding elements among the m first precoding elements; the value of m is determined based on the sum of the number of antenna ports of the n terminal devices, and the value of k is determined based on each The number of antenna ports of the terminal device is determined; n is an integer greater than or equal to 2, m is an integer greater than or equal to n, and k is an integer less than m.

The communication unit 502 is configured to send first indication information to n terminal devices; the first indication information is used to indicate the target precoding matrix.

In a possible implementation, the target precoding matrix is a precoding matrix among one or more first precoding matrices included in the first codebook; k of the first precoding matrices included in the first codebook The first precoding elements are determined after adjusting the phases of the k second precoding elements in the second precoding matrix by an integer multiple of the second value; the second precoding matrix is not included in the second codebook The precoding matrix of the precoding element whose value is zero; the second codebook is the codebook used for data transmission by a single terminal device.

In a possible implementation, among the k first precoding elements among the m first precoding elements corresponding to the first terminal device, the phase difference between different first precoding elements is an integer of the first value. times; the first terminal device is any one of the n terminal devices.

In a possible implementation, the phase difference between any first precoding element corresponding to the first terminal device and any first precoding element corresponding to the second terminal device is an integer multiple of the second value; The second value is smaller than the first value, and the second terminal device is a terminal device other than the first terminal device among the n terminal devices.

In a possible implementation, the value of the first numerical value is The value of the second numerical value is N is an integer greater than 2.

In a possible implementation manner, the target precoding matrix does not include precoding elements with a value of zero.

In a possible implementation, the communication unit 502 is also configured to send codebook configuration information to n terminal devices, where the codebook configuration information is used to configure the first codebook for the n terminal devices.

In a possible implementation, the codebook configuration information includes at least one of a codebook type, a total number of terminal device antenna ports, a port mapping relationship, and a number of transmission layers; where the codebook type is used to indicate the first codebook use For aggregated transmission; the total number of terminal equipment antenna ports is the sum of the number of antenna ports of n terminal equipment; the port mapping relationship is used to indicate the corresponding relationship between the antenna ports of the terminal equipment and the precoding elements in the precoding matrix; the number of transmission layers is used Indicates the number of transmission layers of the target precoding matrix in the first codebook.

In a possible implementation, the number of transmission layers of the target precoding matrix is M, and M is a positive integer; the value of m is M times the sum of the number of antenna ports of n terminal devices; the value of k is the corresponding M times the number of antenna ports of the terminal device.

In a possible implementation, each of the M transmission layers corresponds to one of the m first precoding elements. first precoding elements; among them, each transmission layer corresponds to The first precoding element includes the indivual The first precoding element.

In a possible implementation, the sum of the number of antenna ports of n terminal devices is R; the target precoding matrix is a matrix with R rows and M columns; each of the R antenna ports of n terminal devices corresponds to The first precoding element of different rows in the target precoding matrix.

Taking the communication device as the terminal device in the above method embodiment as an example, FIG. 6 shows a schematic structural diagram of a first terminal device 60. The first terminal device 60 includes a processing unit 601 and a communication unit 602. The communication unit 602, which may also be called a transceiver unit, is used to implement transceiver functions, and may be, for example, a transceiver circuit, a transceiver, a transceiver, or a communication interface.

Among them, the communication unit 602 is used to receive the first instruction information from the network device; the first terminal device is any terminal device among n terminal devices; the n terminal devices are used to transmit the same target transmission block TB; The indication information is used to indicate the target precoding matrix; the target precoding matrix includes m first precoding elements; each of the n terminal devices corresponds to k first precodings among the m first precoding elements. element; the value of m is determined based on the sum of the number of antenna ports of n terminal devices, and the value of k is determined based on the number of antenna ports of each terminal device; n is an integer greater than or equal to 2, and m is greater than or equal to n. Integer, k is an integer less than m.

The processing unit 601 is configured to precode the target data corresponding to the target TB according to the k first precoding elements corresponding to the first terminal device among the m first precoding elements.

In a possible implementation, among the k first precoding elements among the m first precoding elements corresponding to the first terminal device, the phase difference between different first precoding elements is an integer of the first value. times.

In a possible implementation, the communication unit 602 is also used to receive codebook configuration information from the network device, and the codebook configuration information is used to configure the first codebook for n terminal devices.

In a possible implementation, the codebook configuration information includes at least one of the codebook type of the first codebook, the total number of terminal device antenna ports, port mapping relationships, and the number of transmission layers; wherein, the codebook of the first codebook This type is used to indicate that the first codebook is used for aggregate transmission; the total number of terminal equipment antenna ports is the sum of the number of antenna ports of n terminal equipment; the port mapping relationship is used to indicate the antenna ports of the terminal equipment and the precoding in the precoding matrix Correspondence of elements; the number of transmission layers is used to indicate the number of transmission layers of the target precoding matrix in the first codebook.

In a possible implementation, the codebook configuration information includes the number of transmission layers and the port mapping relationship; the processing unit 601 is further configured to: determine the target precoding matrix according to the number of transmission layers and the first indication information and derive the target precoding matrix from the port mapping relationship according to the number of transmission layers and the first indication information. k first precoding elements corresponding to the first terminal device are determined in the target precoding matrix.

In a possible implementation, each of the M transmission layers corresponds to one of the m first precoding elements. first precoding elements; among them, each transmission layer corresponds to The first precoding element includes the the first precoding element.

When implemented by hardware, the communication unit 502 or the communication unit 602 in the embodiment of the present application can be integrated on the communication interface, and the processing unit 501 or the processing unit 601 can be integrated on the processor. The specific implementation is shown in Figure 7.

FIG. 7 shows another possible structural schematic diagram of the communication device involved in the above embodiment. The communication device 70 includes: a processor 702 and a communication interface 703. The processor 702 is used to control and manage the actions of the communication device, for example, to perform the steps performed by the above-mentioned processing unit 501, and/or to perform other processes of the technology described herein. The communication interface 703 is used to support communication between the communication device and other network entities, for example, performing the steps performed by the communication unit 502 mentioned above. The communication device may also include a memory 701 and a bus 704, the memory 701 being used to store program codes and data of the communication device.

The memory 701 may be the memory in the communication device 70 , etc. The memory may include volatile memory, such as random access memory; the memory may also include non-volatile memory, such as read-only memory, flash memory, hard disk. or solid state drive; the memory may also include a combination of the above types of memory.

The above-mentioned processor 702 may implement or execute various exemplary logical blocks, modules and circuits described in connection with the disclosure of this application. The processor may be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field-programmable gate array or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute the various illustrative logical blocks, modules, and circuits described in connection with this disclosure. The processor may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc.

The bus 704 may be an Extended Industry Standard Architecture (EISA) bus or the like. Bus 704 can be divided into address bus, data bus, control bus, etc. For ease of presentation, only one thick line is used in Figure 7, but it does not mean that there is only one bus or one type of bus.

The communication device in Figure 7 can also be a chip. The chip includes one or more (including two) processors 702 and communication interfaces 703 .

In some embodiments, the chip also includes memory 701, which may include read-only memory and random access memory, and provides operating instructions and data to the processor 702. Part of the memory 701 may also include non-volatile random access memory (NVRAM).

In some embodiments, memory 701 stores elements, execution modules, or data structures, or subsets thereof, or extended sets thereof.

In the embodiment of the present application, the corresponding operation is performed by calling the operation instructions stored in the memory 701 (the operation instructions can be stored in the operating system).

Through the above description of the embodiments, those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above functional modules is used as an example. In actual applications, the above functions can be allocated as needed. It is completed by different functional modules, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. For the specific working processes of the systems, devices and units described above, reference can be made to the corresponding processes in the foregoing method embodiments, which will not be described again here.

Embodiments of the present application provide a computer program product containing instructions. When the computer program product is run on a computer, it causes the computer to execute the communication method in the above method embodiment.

Embodiments of the present application also provide a computer-readable storage medium. Instructions are stored in the computer-readable storage medium. When the instructions are run on a computer, they cause the computer to execute the communication method in the method flow shown in the above method embodiment. .

The computer-readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination thereof. More specific examples (non-exhaustive list) of computer-readable storage media include: electrical connections having one or more wires, portable computer disks, hard drives, random access memory (RAM), read-only memory (Read-Only Memory, ROM), Erasable Programmable Read Only Memory (EPROM), register, hard disk, optical fiber, portable compact disk read-only memory (Compact Disc Read-Only Memory, CD-ROM ), an optical storage device, a magnetic storage device, or any suitable combination of the above, or any other form of computer-readable storage medium well known in the art. An exemplary storage medium is coupled to the processor such that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be an integral part of the processor. The processor and storage medium may be located in an Application Specific Integrated Circuit (ASIC). In the embodiments of the present application, the computer-readable storage medium may be any tangible medium containing or storing a program, which may be used by or in combination with an instruction execution system, apparatus or device.

Since the communication devices, computer-readable storage media, and computer program products in the embodiments of the present application can be applied to the above methods, the technical effects that can be obtained can also be referred to the above method embodiments. The embodiments of the present application are not discussed here. Again.

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

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

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

Finally, it should be noted that the above are only specific implementation modes of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application shall be covered by this application. within the scope of protection applied for. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

A communication method, characterized in that the method includes:

The network device determines target precoding matrices corresponding to n terminal devices; the n terminal devices are used to transmit the same target transmission block TB; the target precoding matrix includes m first precoding elements; the n Each of the terminal devices corresponds to k first precoding elements among the m first precoding elements; the value of m is determined based on the sum of the number of antenna ports of the n terminal devices, and the value of k is The value is determined based on the number of antenna ports of each terminal device; n is an integer greater than or equal to 2, m is an integer greater than or equal to n, and k is an integer less than m;

The network device sends first indication information to the n terminal devices; the first indication information is used to indicate the target precoding matrix.
The method of claim 1, wherein the target precoding matrix is a precoding matrix among one or more first precoding matrices included in the first codebook; The k first precoding elements in the first precoding matrix are determined after adjusting the phases of the k second precoding elements in the second precoding matrix by an integer multiple of the second value; The second precoding matrix is a precoding matrix in the second codebook that does not include a precoding element with a value of zero; the second codebook is a codebook used for data transmission by a single terminal device.
The method according to claim 1 or 2, characterized in that among the k first precoding elements among the m first precoding elements corresponding to the first terminal device, the difference between different first precoding elements is The phase difference is an integer multiple of the first value; the first terminal device is any terminal device among the n terminal devices.
The method of claim 3, wherein a phase difference between any first precoding element corresponding to the first terminal device and any first precoding element corresponding to the second terminal device is a second an integer multiple of the value; the second value is smaller than the first value, and the second terminal device is a terminal device other than the first terminal device among the n terminal devices.
The method according to claim 4, characterized in that the value of the first numerical value is The value of the second numerical value is N is an integer greater than 2.
The method according to any one of claims 1 to 5, characterized in that the target precoding matrix does not include precoding elements with a value of zero.
The method according to any one of claims 1-6, characterized in that the method further includes:

The network device sends codebook configuration information to the n terminal devices, where the codebook configuration information is used to configure the first codebook for the n terminal devices.
The method according to claim 7, wherein the codebook configuration information includes at least one of codebook type, total number of terminal device antenna ports, port mapping relationship and number of transmission layers;

Wherein, the codebook type is used to indicate that the first codebook is used for aggregated transmission; the total number of terminal device antenna ports is the sum of the number of antenna ports of the n terminal devices; and the port mapping relationship is used to indicate The corresponding relationship between the antenna port of the terminal device and the precoding elements in the precoding matrix; the number of transmission layers is used to indicate the number of transmission layers of the target precoding matrix in the first codebook.
The method according to any one of claims 1 to 8, characterized in that the number of transmission layers of the target precoding matrix is M, and M is a positive integer;

The value of m is M times the sum of the number of antenna ports of the n terminal devices;

The value of k is M times the number of antenna ports of the corresponding terminal device.
The method according to claim 9, characterized in that each of the M transmission layers corresponds to one of the m first precoding elements. a first precoding element;

Among them, each transport layer corresponds to The first precoding element includes the the first precoding element.
The method according to claim 9 or 10, characterized in that the sum of the number of antenna ports of the n terminal devices is R; the target precoding matrix is a matrix with R rows and M columns; the n terminal devices Each of the R antenna ports corresponds to the first precoding element of a different row in the target precoding matrix.
A communication method, characterized in that the method includes:

The first terminal device receives the first indication information from the network device; the first terminal device is any terminal device among n terminal devices; the n terminal devices are used to transmit the same target transmission block TB; The first indication information is used to indicate the target precoding matrix; the target precoding matrix includes m first precoding elements; each terminal device among the n terminal devices corresponds to the m first precoding elements k first precoding elements in; the value of m is determined based on the sum of the number of antenna ports of the n terminal devices, and the value of k is determined based on the number of antenna ports of each terminal device; n is greater than or An integer equal to 2, m is an integer greater than or equal to n, k is an integer less than m;

The first terminal device precodes the target data corresponding to the target TB according to k first precoding elements corresponding to the first terminal device among the m first precoding elements.
The method of claim 12, wherein the target precoding matrix is a precoding matrix among one or more first precoding matrices included in the first codebook; The k first precoding elements in the first precoding matrix are determined after adjusting the phases of the k second precoding elements in the second precoding matrix by an integer multiple of the second value; The second precoding matrix is a precoding matrix in the second codebook that does not include a precoding element with a value of zero; the second codebook is a codebook used for data transmission by a single terminal device.
The method according to claim 12 or 13, characterized in that among the k first precoding elements among the m first precoding elements corresponding to the first terminal device, one of the different first precoding elements is The phase difference between is an integer multiple of the first value.
The method according to claim 14, characterized in that the phase difference between any first precoding element corresponding to the first terminal device and any first precoding element corresponding to the second terminal device is a second an integer multiple of the value; the second value is smaller than the first value, and the second terminal device is a terminal device other than the first terminal device among the n terminal devices.
The method according to claim 15, characterized in that the value of the first numerical value is The value of the second numerical value is N is an integer greater than 2.
The method according to any one of claims 12 to 16, characterized in that the target precoding matrix does not include precoding elements with a value of zero.
The method according to any one of claims 12-17, characterized in that the method further includes:

The first terminal device receives codebook configuration information from the network device, and the codebook configuration information is used to configure first codebooks for the n terminal devices.
The method according to claim 18, wherein the codebook configuration information includes at least one of the codebook type of the first codebook, the total number of terminal equipment antenna ports, port mapping relationships, and the number of transmission layers;

Wherein, the codebook type of the first codebook is used to indicate that the first codebook is used for aggregated transmission; the total number of antenna ports of the terminal device is the sum of the number of antenna ports of the n terminal devices; the port The mapping relationship is used to indicate the corresponding relationship between the antenna ports of the terminal equipment and the precoding elements in the precoding matrix; the number of transmission layers is used to indicate the number of transmission layers of the target precoding matrix in the first codebook.
The method according to claim 19, wherein the codebook configuration information includes the number of transmission layers and the port mapping relationship; the method further includes:

The first terminal device determines the target precoding matrix according to the number of transmission layers and the first indication information;

The first terminal device determines k first precoding elements corresponding to the first terminal device from the target precoding matrix according to the port mapping relationship.
The method according to any one of claims 12 to 20, characterized in that the number of transmission layers of the target precoding matrix is M, and M is a positive integer;

The value of m is M times the sum of the number of antenna ports of the n terminal devices;

The value of k is M times the number of antenna ports of the corresponding terminal device.
The method according to claim 21, characterized in that each of the M transmission layers corresponds to one of the m first precoding elements. a first precoding element;

Among them, each transport layer corresponds to The first precoding element includes the the first precoding element.
The method according to claim 21 or 22, characterized in that the sum of the number of antenna ports of the n terminal devices is R; the target precoding matrix is a matrix with R rows and M columns; each of the R antenna ports of the n terminal devices respectively corresponds to the first precoding element of a different row in the target precoding matrix.
A communication device, characterized by comprising: a functional unit for executing the method according to any one of claims 1 to 11; wherein the actions performed by the functional unit are implemented by hardware or corresponding software is executed by hardware. accomplish.
A communication device, characterized by comprising: a functional unit for executing the method according to any one of claims 12 to 23; wherein the actions performed by the functional unit are implemented by hardware or corresponding software is executed by hardware. accomplish.
A communication device, characterized in that it includes: a processor and a communication interface; the communication interface is coupled to the processor, and the processor is used to run computer programs or instructions to implement any one of claims 1-11 The communication method described in the item.
A communication device, characterized in that it includes: a processor and a communication interface; the communication interface is coupled to the processor, and the processor is used to run computer programs or instructions to implement any one of claims 12-23 The communication method described in the item.
A computer-readable storage medium, characterized in that instructions are stored in the computer-readable storage medium. When the computer executes the instructions, the computer performs the communication as described in any one of claims 1-11. method, or perform the communication method according to any one of claims 12-23.
A computer program product, characterized in that, when the computer program product is run on a communication device, it causes the communication device to execute the communication method as claimed in any one of claims 1-11, or to execute the communication method as claimed in claim 12- The communication method described in any one of 23.
A communication system, characterized in that it includes a network device and a plurality of terminal devices, wherein the network device is used to perform the communication method as claimed in any one of claims 1-11, and the terminal device is used to perform the communication method as claimed in claim 1. The communication method described in any one of claims 12-23.