Channel information transmission method and apparatus

Abstract

Provided in the present application are a channel information transmission method and apparatus. The method can be applied to the field of communications. The method comprises: receiving N first reference signals; and sending first reporting information, wherein the first reporting information is used for indicating the first X elements having the highest priority in a first channel matrix, which elements are obtained on the basis of a first sorting rule, the first channel matrix is determined on the basis of the N first reference signals, and both N and X are integers greater than or equal to 2. By means of the method, a network device can obtain, by means of an air interface, channel information that corresponds to other network devices and is required for calculating weights; in this way, although weights are respectively calculated by network devices, it is equivalent to jointly calculating CJT weights by means of a plurality of network devices, thereby improving the performance of CJT transmission performed by the network devices.

Description

Channel information transmission method and device

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on October 31, 2023, with application number 202311437897.X and application name “Method and Device for Transmitting Channel Information”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communications, and more specifically, to a method and apparatus for transmitting channel information. Background Art

[0003] Coherent joint transmission (CJT) is a multi-antenna technology commonly used in wireless communication systems, especially in multi-user, multi-cell systems. The main idea of ​​CJT is to improve the received signal to interference plus noise ratio (SINR) of the terminal equipment (UE) while reducing inter-cell interference through technologies such as joint transmission and joint scheduling of multiple network devices. Specifically, when a UE is served by multiple network devices, these network devices can use CJT to coherently superimpose the received signals at the UE and coherently cancel the interference, thereby improving network throughput and user experience. In this process, the devices can jointly design transmission weights based on the joint channels from multiple network devices to the UE, and transmit the same data stream to ensure the coherent superposition of the received signals on the UE side.

[0004] However, in the scenario of non-ideal backhaul links (BH), the delay in information exchange between multiple network devices through the non-ideal BH is relatively large, resulting in the inability to conduct real-time information exchange between multiple network devices, and thus the inability to obtain accurate real-time weights, which seriously affects the effect of CJT transmission.

[0005] Summary of the Invention

[0006] The present application provides a method and apparatus for transmitting channel information, by which a network device can obtain the channel information corresponding to other network devices required for calculating weights through an air interface. In this way, although the weights are calculated separately between network devices, it is equivalent to jointly calculating the CJT weights of multiple network devices, thereby improving the performance of the network device in performing CJT transmission.

[0007] In a first aspect, a method for transmitting channel information is provided, the method comprising: receiving N reference signals; and sending first reporting information, where the first reporting information is used to indicate the first X elements with the highest priority obtained in a first channel matrix according to a first sorting rule, wherein the first channel matrix is ​​determined based on the N reference signals, and N and X are both integers greater than or equal to 2.

[0008] Optionally, the reference signal may be a channel state information reference signal (CSI-RS).

[0009] Optionally, the above-mentioned channel information transmission method can be executed by a first terminal device, which can be any one of a plurality of terminal devices. In some scenarios, each of the plurality of terminal devices can execute the above-mentioned channel information transmission method.

[0010] In an embodiment of the present application, the first terminal device can send a first reporting information based on the received N reference signals, so that the network device can determine the multi-user weights corresponding to multiple terminal devices (including the first terminal device) based on the multiple first reporting information reported by the multiple terminal devices. In this way, in the scenario of a non-ideal backhaul link, the network device can obtain the channel information corresponding to other network devices required to calculate the weights through the air interface. In this way, although the weights are calculated separately between the network devices, it is equivalent to jointly calculating the CJT weights of multiple network devices, thereby improving the performance of the network device for CJT transmission.

[0011] In combination with the first aspect, in certain implementations of the first aspect, the N reference signals belong to M groups of reference signals, and the first reporting information includes: a correspondence between the X elements and the N reference signals in the M groups, where M is an integer greater than or equal to 2, and N and X are greater than or equal to M.

[0012] Optionally, the M groups of reference signals may refer to M CSI-RS resources, and multiple reference signals in each group may correspond to multiple ports in one CSI-RS resource.

[0013] In combination with the first aspect, in some implementations of the first aspect, the corresponding relationship is indicated by a bitmap.

[0014] With reference to the first aspect, in certain implementations of the first aspect, the first reporting information further includes: amplitudes and phases corresponding to the X elements.

[0015] In combination with the first aspect, in certain implementations of the first aspect, each of the N reference signals is obtained by weighting a single-user weight of a terminal device in a network device in a plurality of network devices among a plurality of terminal devices.

[0016] With reference to the first aspect, in certain implementations of the first aspect, the reference signal is a CSI-RS.

[0017] In a second aspect, a method for transmitting channel information is provided, the method comprising: receiving multiple first reporting information sent from multiple terminal devices, one first reporting information among the multiple first reporting information is used to indicate the top X elements with the highest priority obtained according to a first sorting rule in a first channel matrix of one terminal device among the multiple terminal devices, the first channel matrix being determined based on N reference signals, and N and X are both integers greater than or equal to 2; determining multi-user weights of the multiple terminal devices based on the multiple first reporting information.

[0018] In an embodiment of the present application, the network device can determine the multi-user weights of multiple terminal devices (including the first terminal device) based on multiple first reporting information sent by multiple terminal devices. In this way, in a non-ideal backhaul link scenario, the network device can obtain the channel information corresponding to other network devices required to calculate the weights through the air interface. In this way, although the weights are calculated separately between the network devices, it is equivalent to jointly calculating the CJT weights of multiple network devices, thereby improving the performance of the network device in CJT transmission.

[0019] In combination with the second aspect, in certain implementations of the second aspect, the N reference signals belong to M groups of reference signals, and one of the multiple first reporting information includes: a correspondence between the X elements and the N reference signals in the M groups, where M is an integer greater than or equal to 2, and N and X are greater than or equal to M.

[0020] In combination with the second aspect, in some implementations of the second aspect, the corresponding relationship is indicated by a bitmap.

[0021] With reference to the second aspect, in certain implementations of the second aspect, the first reporting information among the multiple reporting information further includes: amplitudes and phases corresponding to the first X elements.

[0022] In combination with the second aspect, in certain implementations of the second aspect, each of the N reference signals is obtained by weighting a single-user weight of one of the multiple terminal devices in one of the multiple network devices.

[0023] In combination with the second aspect, in some implementations of the second aspect, the reference signal is a CSI-RS.

[0024] In a third aspect, a method for transmitting channel information is provided, the method comprising: receiving Q reporting resource indications and N reference signals; sending qth second reporting information on the qth reporting resource, wherein the qth second reporting information is used to indicate the top X highest priority channels in the qth channel matrix obtained according to the first sorting rule. q elements, the qth channel matrix is ​​determined based on part of the N reference signals, N and X q are all integers greater than or equal to 2, and q is less than or equal to Q.

[0025] Optionally, the reference signal may be a CSI-RS.

[0026] Optionally, the above-mentioned method for transmitting channel information may be executed by a first terminal device, which may be any one of a plurality of terminal devices. In some scenarios, each of the plurality of terminal devices may execute the above-mentioned method for transmitting channel information.

[0027] In an embodiment of the present application, the first terminal device can send the qth second reporting information on the qth reporting resource based on the received Q reporting resource indications and N reference signals, so that the network device can determine the multi-user weights corresponding to multiple terminal devices (including the first terminal device) based on the qth second reporting information. In this way, in the scenario of a non-ideal backhaul link, the network device can obtain the channel information corresponding to other network devices required to calculate the weights through the air interface. In this way, although the weights are calculated separately between the network devices, it is equivalent to jointly calculating the CJT weights of multiple network devices, thereby improving the performance of the network device in CJT transmission.

[0028] In conjunction with the third aspect, in certain implementations of the third aspect, the N reference signals belong to M groups of reference signals, and the qth second reporting information includes: the X q The corresponding relationship between the elements and the M groups of N reference signals, M is an integer greater than or equal to 2, N and X q Greater than or equal to M.

[0029] Optionally, the M groups of reference signals may refer to M CSI-RS resources, and multiple reference signals in each group may correspond to multiple ports in one CSI-RS resource.

[0030] In combination with the third aspect, in some implementations of the third aspect, the corresponding relationship is indicated by a bitmap.

[0031] In conjunction with the third aspect, in certain implementations of the third aspect, the qth second reporting information further includes: the X qThe amplitude and phase of each element.

[0032] In combination with the third aspect, in certain implementations of the third aspect, the N reference signals are obtained by weighting a single-user weight of one terminal device in one network device among multiple terminal devices.

[0033] In combination with the third aspect, in certain implementations of the third aspect, the N reference signals are N CSI-RSs.

[0034] In a fourth aspect, a method for transmitting channel information is provided, the method comprising: receiving a plurality of second reporting information sent from a plurality of terminal devices, the plurality of second reporting information comprising a terminal device among the plurality of terminal devices receiving a qth second reporting information on a qth reporting resource, the qth second reporting information being used to indicate the top X highest priority channels in the qth channel matrix obtained according to a first sorting rule; q elements, the qth channel matrix is ​​determined based on part of the N reference signals, the qth reporting resource belongs to one of the reporting resources indicated by the Q reporting resources, N and X q are all integers greater than or equal to 2, and q is less than or equal to Q; based on the multiple second reported information, the multi-user weights of the multiple terminal devices are determined.

[0035] In an embodiment of the present application, the network device can determine the multi-user weights of multiple terminal devices (including the first terminal device) based on multiple second reporting information sent by multiple terminal devices. In this way, in the scenario of a non-ideal backhaul link, the network device can obtain the channel information corresponding to other network devices required to calculate the weights through the air interface. In this way, although the weights are calculated separately between the network devices, it is equivalent to jointly calculating the CJT weights of multiple network devices, thereby improving the performance of the network device in CJT transmission.

[0036] In conjunction with the fourth aspect, in certain implementations of the fourth aspect, the N reference signals belong to M groups of reference signals, and the qth second reporting information includes the X q The corresponding relationship between the elements and the M groups of N reference signals, M is an integer greater than or equal to 2, N and X q Greater than or equal to M.

[0037] In combination with the fourth aspect, in some implementations of the fourth aspect, the corresponding relationship is indicated by a bitmap.

[0038] In conjunction with the fourth aspect, in certain implementations of the fourth aspect, the qth second reporting information further includes: the X with the highest priority q The amplitude and phase of each element.

[0039] In combination with the fourth aspect, in certain implementations of the fourth aspect, the N reference signals are obtained by weighting a single-user weight of one terminal device among the multiple terminal devices in one network device among the multiple network devices.

[0040] In combination with the fourth aspect, in certain implementations of the fourth aspect, the reference signal is a CSI-RS.

[0041] In a fifth aspect, a channel information transmission device is provided, the device comprising: a receiving unit, a sending unit, and a processing unit; the receiving unit is used to receive N reference signals; the processing unit is used to determine first reporting information based on the N reference signals, the first reporting information being used to indicate the first X elements with the highest priority obtained in the first channel matrix according to the first sorting rule, where N and X are both integers greater than or equal to 2; the sending unit is used to send the first reporting information.

[0042] In combination with the fifth aspect, in certain implementations of the fifth aspect, the N reference signals belong to M groups of reference signals, and the first reporting information includes: a correspondence between the X elements and the N reference signals in the M groups, where M is an integer greater than or equal to 2, and N and X are greater than or equal to M.

[0043] In combination with the fifth aspect, in some implementations of the fifth aspect, the corresponding relationship is indicated by a bitmap.

[0044] In combination with the fifth aspect, in certain implementations of the fifth aspect, the first reported information further includes: amplitudes and phases corresponding to the X elements.

[0045] In combination with the fifth aspect, in certain implementations of the fifth aspect, the N reference signals are obtained by weighting a single-user weight of one terminal device among multiple terminal devices in one network device among multiple network devices.

[0046] In combination with the fifth aspect, in certain implementations of the fifth aspect, the reference signal is a CSI-RS.

[0047] In a sixth aspect, a device for transmitting channel information is provided, the device comprising: a receiving unit and a processing unit; the receiving unit is used to receive multiple first reporting information sent from multiple terminal devices, one first reporting information among the multiple first reporting information is used to indicate the top X elements with the highest priority obtained according to a first sorting rule in a first channel matrix of one of the multiple terminal devices, the first channel matrix is ​​determined based on N reference signals, and N and X are both integers greater than or equal to 2; the processing unit is used to determine the multi-user weights of the multiple terminal devices based on the multiple first reporting information.

[0048] In combination with the sixth aspect, in certain implementations of the sixth aspect, the N reference signals belong to M groups of reference signals, and one of the multiple first reporting information includes: a correspondence between the X elements and the N reference signals in the M groups, where M is an integer greater than or equal to 2, and N and X are greater than or equal to M.

[0049] In combination with the sixth aspect, in some implementations of the sixth aspect, the corresponding relationship is indicated by a bitmap.

[0050] In combination with the sixth aspect, in some implementations of the sixth aspect, the first reporting information among the multiple reporting information further includes: amplitudes and phases corresponding to the X elements.

[0051] In combination with the sixth aspect, in certain implementations of the sixth aspect, the N reference signals are obtained by weighting a single-user weight of one of the multiple terminal devices in one of the multiple network devices.

[0052] In combination with the sixth aspect, in certain implementations of the sixth aspect, the reference signal is a CSI-RS.

[0053] In a seventh aspect, a channel information transmission device is provided, the device comprising: a receiving unit, a sending unit, and a processing unit; the receiving unit is configured to receive Q reporting resource indications and N reference signals; the processing unit is configured to determine, based on the N reference signals, a qth second reporting information, the qth second reporting information being used to indicate the top X highest priority channels in the qth channel matrix obtained according to the first sorting rule. q elements, N and X q are all integers greater than or equal to 2, and q is less than or equal to Q; the sending unit is used to send the qth second reporting information on the qth reporting resource.

[0054] In conjunction with the seventh aspect, in certain implementations of the seventh aspect, the N reference signals belong to M groups of reference signals, and the qth second reporting information includes: the X q The corresponding relationship between the elements and the M groups of N reference signals, M is an integer greater than or equal to 2, N and X q Greater than or equal to M.

[0055] In combination with the seventh aspect, in some implementations of the seventh aspect, the corresponding relationship is indicated by a bit map.

[0056] In conjunction with the seventh aspect, in certain implementations of the seventh aspect, the qth second reporting information includes: the X q The amplitude and phase of each element.

[0057] In combination with the seventh aspect, in certain implementations of the seventh aspect, the N reference signals are weighted by a single-user weight of one terminal device among multiple terminal devices in one network device among multiple network devices.

[0058] In combination with the seventh aspect, in certain implementations of the seventh aspect, the reference signal is a CSI-RS.

[0059] In an eighth aspect, a device for transmitting channel information is provided, the device comprising: a receiving unit and a processing unit; the receiving unit is configured to receive a plurality of second reporting information sent from a plurality of terminal devices, the plurality of second reporting information including the qth second reporting information received by one of the plurality of terminal devices on the qth reporting resource, the qth second reporting information being used to indicate the top X highest priority channels in the qth channel matrix obtained according to the first sorting rule; q elements, the qth channel matrix is ​​determined based on part of the N reference signals, the qth reporting resource belongs to one of the reporting resources indicated by the Q reporting resources, N and X q are all integers greater than or equal to 2, and q is less than or equal to Q; the processing unit is used to determine the multi-user weights of the multiple terminal devices based on the multiple second reported information.

[0060] In conjunction with the eighth aspect, in certain implementations of the eighth aspect, the N reference signals belong to M groups of reference signals, and the qth second reporting information includes the X q The corresponding relationship between the elements and the M groups of N reference signals, M is an integer greater than or equal to 2, N and X q Greater than or equal to M.

[0061] In conjunction with the eighth aspect, in certain implementations of the eighth aspect, the qth second reporting information further includes: the X q The amplitude and phase of each element.

[0062] In combination with the eighth aspect, in certain implementations of the eighth aspect, each of the N reference signals is obtained by weighting a single-user weight of a network device among the multiple network devices by a terminal device among the multiple terminal devices.

[0063] In combination with the eighth aspect, in certain implementations of the eighth aspect, the reference signal is a CSI-RS.

[0064] In the ninth aspect, a device for transmitting channel information is provided, comprising: at least one processor and a memory, wherein the at least one processor is coupled to the memory and is configured to read and execute instructions in the memory, so that the device implements the method in any one of the implementation methods of the first to fourth aspects above.

[0065] In the tenth aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores a program code. When the computer program code is run on a computer, the computer executes the method in any one of the implementation methods of the first to fourth aspects above.

[0066] In an eleventh aspect, a chip is provided, which includes a circuit for executing the method in any one of the implementations of the first to fourth aspects above.

[0067] In a twelfth aspect, a computer program product is provided, which includes a computer program. When the computer program is run, the computer executes the method in any one of the implementation modes of the first to fourth aspects above.

[0068] In the thirteenth aspect, a terminal device is provided, comprising: an apparatus in any one of the implementation methods of the above-mentioned first aspect or third aspect.

[0069] In a fourteenth aspect, a network device is provided, comprising: an apparatus in any one of the implementation methods of the second or fourth aspect above. BRIEF DESCRIPTION OF THE DRAWINGS

[0070] FIG1 is a schematic diagram of CJT transmission between base stations provided in an embodiment of the present application;

[0071] FIG2 is an application scenario applicable to a method for transmitting channel information provided in an embodiment of the present application;

[0072] FIG3 is a system architecture applicable to a method for transmitting channel information provided in an embodiment of the present application;

[0073] FIG4 is a schematic flowchart of a method for transmitting channel information provided in an embodiment of the present application;

[0074] FIG5 is a schematic flowchart of another method for transmitting channel information provided in an embodiment of the present application;

[0075] FIG6 is a schematic diagram of another method for transmitting channel information provided in an embodiment of the present application;

[0076] FIG7 is a schematic diagram of BS collecting UE correlation and weight calculation according to an embodiment of the present application;

[0077] FIG8 is a schematic diagram of a channel information transmission device provided in an embodiment of the present application;

[0078] FIG9 is a schematic diagram of another channel information transmission device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0079] The technical solution in this application will be described below with reference to the accompanying drawings.

[0080] In the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In this application, "at least one" refers to one or more, and "more than one" refers to two or more. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple.

[0081] In the embodiments of this application, prefixes such as "first" and "second" are used only to distinguish different description objects and have no limiting effect on the position, order, priority, quantity, or content of the described objects. The use of prefixes such as ordinal numbers in the embodiments of this application to distinguish description objects does not constitute a limitation on the described objects. For a statement of the described objects, please refer to the description in the context of the claims or embodiments, and the use of such prefixes should not constitute an unnecessary limitation.

[0082] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: general packet radio service (GPRS), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), world-wide interoperability for microwave access (WiMAX) communication system, future fifth generation (5G) system or new radio (NR), etc.

[0083] The terminal device in the embodiments of the present application may refer to a user device, an access terminal, a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user apparatus. The terminal device may also be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a future 5G network, or a terminal device in a future evolved public land mobile network (PLMN), etc., and the embodiments of the present application are not limited thereto.

[0084] The network device in the embodiment of the present application may be a device for communicating with a terminal device. The network device may be an evolved NodeB (eNB or eNodeB) in an LTE system, or a wireless controller in a cloud radio access network (CRAN) scenario, or the network device may be a relay station, an access point, a vehicle-mounted device, a wearable device, a network device in a future 5G network, or a network device in a future evolved PLMN network, etc., and the embodiment of the present application is not limited thereto.

[0085] CJT is a multi-antenna technology that is commonly used in wireless communication systems, especially in multi-user, multi-cell systems. The main idea of ​​CJT is to improve the UE's receiving SINR while reducing inter-cell interference through technologies such as joint transmission and joint scheduling of multiple network devices. Specifically, when a UE is served by multiple network devices, these network devices can use joint transmission to make the received signals coherently superimposed at the UE and the interference coherently canceled, thereby improving the network throughput and user experience. In this process, the device can jointly design the transmission weights based on the joint channels from multiple network devices to the UE, and transmit the same data stream to ensure the coherent superposition of the received signals on the UE side.

[0086] The following introduces the technical problems to be solved by this application and the technical solutions adopted.

[0087] As shown in Figure 1, base stations (BS) 1 and BS2 provide services to UEs in a CJT manner, where BS1 is the serving base station and BS2 is the collaborative serving base station. The CJT weight design process can be as follows: BS1 obtains channel information H1 with the UE; BS2 exchanges its channel information H2 with the UE to BS1, and BS1 designs the CJT weights based on the joint channel [H1 H2]. Finally, BS1 can exchange the weight W2 and data to BS2. After BS2 receives W2 and the data, BS1 and BS2 can perform joint transmission. H1 and H2 can represent the downlink channels from BS1 and BS2 to the UE, respectively. The joint channel [H1 H2] can be a channel matrix composed of the downlink channel information from BS1 and BS2 to the UE. W1 and W2 can represent the BS1 component and the BS2 component of the UE's CJT weight, respectively.

[0088] However, this process requires at least two base station interactions. When BS1 and BS2 are in a non-ideal BH scenario, the latency of BH interaction between BS1 and BS2 is high, making real-time information exchange impossible. For example, in an IP radio access network (IPRAN) networking scenario, the typical BH interaction latency is 4ms, while the typical latency of a timeslot is 0.5ms or 1ms. Since weights also need to be updated every timeslot, the method shown in Figure 1 cannot meet the real-time requirements of weight design, affecting CJT transmission performance.

[0089] The embodiments of the present application provide a method and apparatus for transmitting channel information. In a non-ideal BH scenario, a network device can obtain the channel information corresponding to other network devices required for calculating weights through an air interface. In this way, although the weights are calculated separately between network devices, it is equivalent to jointly calculating the CJT weights of multiple network devices, thereby improving the performance of the network device in performing CJT.

[0090] It should be understood that the base station in the embodiment of the present application can be a type of network equipment, and the two can be used interchangeably.

[0091] Before introducing the channel information transmission method provided in this application, we first take Figure 2 as an example to introduce what information needs to be reported through the air interface in order to design the joint CTJ weight in a non-ideal BH scenario. To simplify the description of the problem, in the scenario shown in Figure 2, two base stations BS1 and BS2 serve two UEs, namely UE1 and UE2, through CJT.

[0092] As shown in Figure 2, to design the joint CJT weights, we first need to perform singular value decomposition (SVD) on the joint channels from BS1 and BS2 to UE1 and UE2, respectively, as shown in the following formula:

[0093] Among them, the joint channel [H 11 H 21 ] and [H 12 H 22 ] in the H subscript can represent the BS number, and the second digit in the H subscript can represent the UE number. 21 represents the downlink channel from BS2 to UE1; U1 and U2 are left singular matrices, ∑1 and ∑2 are diagonal matrices, and the diagonal elements in the diagonal matrices are the singular values ​​of the joint channel matrix; and is the right singular matrix of the joint channel and can be used as the joint single user (SU) weights of UE1 and UE2 respectively.

[0094] At this time, the multi-user (MU) weights of UE1 and UE2 can be respectively as follows:

[0095] Where λ1 and λ2 represent the regularization factors of BS1 and BS2 for the MU weights, respectively. These factors are introduced to ensure that the calculated weights meet certain constraints, such as the total transmit power constraint of the base station. and The first digit of the W subscript in the BS can represent the BS number, and the second digit of the W subscript can be used to represent the UE number. 11 Represents the component of BS1 in the CJT weight of UE1.

[0096] It should be understood that the single-user weight can refer to the weight calculated based only on the channel of a certain user (terminal device), and the general goal is to make the received signal of a certain user the strongest; the joint single-user weight can refer to the weight calculated by the joint channel from multiple network devices to a certain UE; the multi-user weight can refer to the weight calculated by jointly considering the channels of multiple users, and suppressing interference from other users while making the received signal of each user as large as possible.

[0097] Among them, the block matrix is ​​defined as:

[0098] This matrix can represent the covariance matrix of the SU weights corresponding to all UEs jointly served by BS1 and BS2. For the above formula, taking the CJT weight calculation of UE1 as an example, W 11 and W 21 They can be calculated using the following formulas:

[0099] Among them, W 11 and W 21 It can be obtained by distributed calculation by BS1 and BS2 respectively (i.e., BS1 calculates W 11 , calculated by BS2 21 ), it can be seen from the above formula that for the part calculated by BS1, the cross information involving BS2 is and That is, the autocorrelation of UE1 on BS2 channel and the cross-correlation between UE1 and UE2 on BS2 channel; for the part calculated by BS2, the cross information involving BS1 is and These are the autocorrelation of UE1 with respect to BS1's channel, and the cross-correlation between UE1 and UE2 with respect to BS1's channel. Based on the above analysis, it is necessary to report cross-correlation information corresponding to other network devices over the air interface. This means that each UE must measure and report its correlation with other UEs with respect to base station channels. Other UEs can refer to UEs served by the same network device.

[0100] FIG3 is a system architecture applicable to a channel information transmission method provided in an embodiment of the present application.

[0101] As shown in Figure 3, the network equipment and terminal equipment involved in the embodiments of the present application may include: a radio resource control (RRC) signaling interaction module, a media access control (MAC) signaling interaction module and a physical layer (PHY) signaling interaction module.

[0102] The RRC signaling interaction module can be used to receive or send RRC information to manage and control key parameters and resources related to the wireless network. The MAC signaling interaction module can be used to receive or send MAC-CE signaling to ensure effective communication between network devices and terminal devices. The PHY signaling interaction module can be used to receive or send: uplink / downlink control signaling and uplink / downlink control data, and transmit reference signals (e.g., CSI-RS) to measure channel state information (CSI).

[0103] Specifically in the present application, the network device can send RRC signaling to the terminal device, and the RRC signaling can be used to indicate the reference signal resources for correlation measurement of the terminal device, and the PUCCH or PUSCH resources for correlation reporting by the terminal device. The network device can also send a downlink reference signal (for example, CSI-RS) to the terminal device. After the terminal device receives the CSI-RS sent by the network device, it can measure the channel correlation with other terminal devices. After the measurement is completed, the terminal device can report the correlation of the terminal device to the network device via PUSCH or PUCCH, thereby facilitating the network device to perform CJT joint weight design and communication.

[0104] FIG4 is a schematic flowchart of a channel information transmission method provided in an embodiment of the present application. Method 400 may include steps S401 to S402.

[0105] S401: A first terminal device receives N reference signals, where N is an integer greater than or equal to 2.

[0106] Optionally, the reference signal may be a CSI-RS. It should be noted that the following description uses the CSI-RS as an example, and this application does not specifically limit the reference signal. The reference signal may also be other reference signals such as a demodulation reference signal (DMRS).

[0107] The N CSI-RSs belong to M groups of CSI-RSs, where M is an integer greater than or equal to 2, and N is an integer greater than or equal to M.

[0108] Optionally, the M groups of CSI-RSs may refer to M CSI-RS resources, and multiple CSI-RSs in each group may correspond to multiple ports in one CSI-RS resource.

[0109] For example, the M groups of CSI-RS may come from M network devices, i.e., each network device may transmit a group of CSI-RS; alternatively, the M groups of CSI-RS may come from fewer than M network devices, i.e., each of these network devices transmits one or more groups of CSI-RS, for a total of M groups of CSI-RS. Figure 4 shows a first terminal device receiving a total of N CSI-RS transmitted from the first network device and at least one collaborative network device.

[0110] Optionally, each CSI-RS in each CSI-RS group may be weighted by a single-user weight of a terminal device among the multiple terminal devices at a certain network device. This can also be understood as: each CSI-RS in each CSI-RS group may be weighted by a component of a joint single-user weight of a terminal device among the multiple terminal devices at a certain network device.

[0111] For example, in a scenario with two network devices (including a first network device and a second network device) and two terminal devices (including a first terminal device and a second terminal device), where each terminal device transmits only one data stream, each network device sends a set of CSI-RS reference signals, and each set of reference signals includes two CSI-RS reference signals. This scenario also corresponds to the scenario in Figure 2, where the two network devices can be BS1 and BS2 in Figure 2, and the two terminal devices can be UE1 and UE2.

[0112] The first terminal device can receive 2 groups of 4 CSI-RS, the first group of CSI-RS includes 2 CSI-RS, and the first CSI-RS in the first group is composed of the first terminal device's joint single-user weight in the first network device's component V 11 Weighted; the second CSI-RS in the first group is composed of the second terminal device's joint single-user weight component V in the first network device 12 Weighted; the second group of CSI-RS includes 2 CSI-RS, the first CSI-RS in the second group is composed of the joint single-user weight of the first terminal device in the second network device component V 21 Weighted; the second CSI-RS in the second group is composed of the second terminal device's joint single-user weight component V in the second network device 22 Weighted. Among them, the above V 11 、V 12 、V 21 and V 22 The same column in the first channel matrix.

[0113] In this example, the first terminal device can receive 2 CSI-RS resources, each CSI-RS resource can include two CSI-RS ports, wherein the two CSI-RS ports on the first CSI-RS resource can be respectively V 11 and V 12 Weighted, the two CSI-RS ports on the second CSI-RS resource can be used with V 21 and V 22 Weighted.

[0114] S402, the first terminal device sends first reporting information.

[0115] Exemplarily, the first terminal device sends first reporting information to multiple network devices participating in CJT (including: the first network device and at least one collaborative network device).

[0116] The first reporting information is used to indicate the first X elements with the highest priority obtained according to the first sorting rule in the first channel matrix, where the first channel matrix is ​​determined according to N CSI-RSs, and X is an integer greater than or equal to M.

[0117] The first terminal device receives M groups of N CSI-RSs, and the first reporting information may include a correspondence between the first X elements with the highest priority and the N CSI-RSs in the M groups. In other words, an element among the first X elements with the highest priority corresponds to a CSI-RS in a group of the M CSI-RSs, or the position of the X elements in the first channel matrix.

[0118] Optionally, the above correspondence may be indicated using a bitmap.

[0119] In one possible implementation, the first terminal device transmits a data stream, in which case the bitmap includes N bits, each bit can correspond to one CSI-RS among the above-mentioned N CSI-RSs, and the corresponding bit in the N bits is set to 1 (or 0) to indicate that the reported information includes the correlation measured by the corresponding CSI-RS port, which can also be understood as the correlation measured from the CSI-RS port is one of the top X elements with the highest priority obtained according to the first sorting rule; conversely, the corresponding bit in the N bits is set to 0 (or 1) to indicate that the reported information does not include the correlation measured by the corresponding CSI-RS port, which can also be understood as the correlation measured from the CSI-RS port is not within the range of the top X elements with the highest priority obtained according to the first sorting rule. Exemplarily, the measured correlations are sorted according to energy size, and a preset number of elements with the highest energy are taken, and the bits corresponding to these elements are set to 1; the bits corresponding to the remaining elements are set to 0.

[0120] Among them, the bit map can be arranged from low to high according to the resource identification (identity, ID). For example, the first terminal device receives 3 CSI-RS resources, each CSI-RS resource includes 2 CSI-RS ports, and the bit map can contain 6 bits. The first 2 bits are used to indicate whether the elements measured by the two ports in the first CSI-RS resource are reported, the middle two bits of the bit map are used to indicate whether the elements measured by the two ports in the second CSI-RS resource are reported, and the last two bits of the bit map are used to indicate whether the elements measured by the two ports in the third CSI-RS resource are reported.

[0121] In another possible implementation, the first terminal device transmits v data streams, in which case the bit map may include N×v bits, and the corresponding bit in the N×v bits is set to 1 (or 0) to indicate that the reported information includes the correlation corresponding to the corresponding data stream measured by the corresponding CSI-RS port; conversely, the corresponding bit in the N×v bits is set to 0 (or 1) to indicate that the reported information does not include the correlation corresponding to the corresponding data stream measured by the corresponding CSI-RS port.

[0122] Among them, the bit map can be arranged from low to high according to the resource ID. For example, the first terminal device transmits 2 data streams, and the first terminal device receives 2 CSI-RS resources. Each CSI-RS resource includes 2 CSI-RS ports. The bit map can contain 8 bits. The first and second bits are respectively used to indicate whether the correlation measured by the two data streams of the first terminal device on the first port in the first CSI-RS resource is reported, the third and fourth bits are respectively used to indicate whether the correlation measured by the two data streams of the first terminal device on the second port in the first CSI-RS resource is reported, the fifth and sixth bits are respectively used to indicate whether the correlation measured by the two data streams of the first terminal device on the first port in the second CSI-RS resource is reported, and the seventh and eighth bits are respectively used to indicate whether the correlation measured by the two data streams of the first terminal device on the second port in the second CSI-RS resource is reported.

[0123] Optionally, the first reporting information includes: amplitudes and phases corresponding to the first X elements with the highest priority.

[0124] In one possible implementation, the first channel matrix can be understood as being used to indicate the channel correlations of multiple terminal devices and the first terminal device with respect to M network devices; the first reporting information is used to indicate the top X elements with the highest priority obtained according to the first sorting rule in the first channel matrix, which can be understood as: the first reporting information is used to indicate partial or full correlations among the channel correlations of multiple terminal devices and the first terminal device with respect to M network devices, and the multiple terminal devices include the first terminal device.

[0125] For example, in a scenario of two network devices (including: a first network device and a second network device) and two terminal devices (including a first terminal device and a second terminal device), the first channel matrix may include some or all of the following correlations: the channel autocorrelation of the first terminal device with respect to the first network device, denoted as The channel correlation between the first terminal device and the second terminal device with respect to the first network device is denoted as The channel autocorrelation of the first terminal device with respect to the second network device is expressed as And the channel correlation between the first terminal device and the second terminal device about the second network device is recorded as The first terminal device can sort the and The first X elements with the highest priority are selected as the first reporting information and reported.

[0126] Optionally, the number of elements in the first channel matrix may be v×N, where v is the number of data streams that can be transmitted by the first terminal device.

[0127] In a possible implementation, the first sorting rule may be to arrange the N CSI-RSs in descending order of energy based on the correlations measured.

[0128] In a possible implementation, each of the multiple terminal devices can transmit a data stream. In this case, the first sorting rule can be to and Arrange them in descending order of energy. For example, when X=4, the first terminal device can and All are reported; when X=3, the first terminal device can and Select the three with the largest energy and report them.

[0129] In another implementation, each of the multiple terminal devices can transmit multiple data streams, and the single-user weights of the terminal devices can have multiple columns, each of which can be used to weight a certain CSI-RS port. For example, the first terminal device transmits 2 data streams and the second terminal device transmits 3 data streams. At this time, the first terminal device receives 2 groups of 5 reference signals. The first 2 CSI-RS in the first group can be obtained by the single-user weight of the first terminal device in the component V of the first network device. 11 Weighted, by measuring the above two CSI-RS, we can get The last three CSI-RSs in the first group may be obtained by the single-user weight of the second terminal device at the first network device. 12 By measuring the above three CSI-RS, we can get The first two CSI-RSs in the second group can be obtained by the single-user weight of the first terminal device and the component V of the second network device. 21 By measuring the above two CSI-RS, we can get The last three CSI-RSs in the second can be obtained by the single-user weight of the second terminal device in the component V of the second network device. 22By measuring the above three CSI-RS, we can get At this time, the first terminal device can obtain the first channel matrix It includes 4 sub-matrices. Among them, and is a 2×2 matrix, and It is a 2×3 matrix. The element in the i-th row and j-th column of each submatrix represents the correlation between the i-th data stream and the j-th data stream of a certain network device channel between two terminal devices. For example, The element in the i-th row and j-th column of represents the correlation between the i-th data stream of the first terminal device and the j-th data stream of the second terminal device with respect to the first network device channel. The first terminal device may select the first X elements with the highest priority from all elements of the four submatrices according to the first sorting rule as the first reporting information and report the first reporting information.

[0130] In one possible implementation, the size of X can be configured by the network device, that is, the first terminal device can receive configuration information sent by the network device and determine the specific value of X based on the configuration information, so that the network device can control the reported resource overhead of the terminal device.

[0131] For example, the value of X can be configured through RRC, which can be sent down together with the reported resources or configured separately. The value of X can be αN×v. Exemplarily, the value of α can be 1, 0.75, 0.5 or 0.25; v represents the number of data streams transmitted by the first terminal device.

[0132] Steps S401 to S402 introduce the specific process of the first terminal device sending the first reporting information. Similarly, other terminal devices among the multiple terminal devices can also send the first reporting information to the network devices participating in CJT. The specific reporting process will be introduced in conjunction with Figures 6 and 7 and will not be repeated here.

[0133] When multiple terminal devices each send a first report, the network device can determine the multi-user weights of the multiple terminal devices (including the first terminal device) based on the received first reports. In this way, in the case of a non-ideal backhaul link, the network device can obtain the channel information corresponding to other network devices required to calculate the weights through the air interface. In this way, although the weights are calculated individually between network devices, they are equivalent to the CJT weights calculated jointly by multiple network devices, thereby improving the performance of the network device in CJT transmission.

[0134] FIG5 is a schematic flowchart of a channel information transmission method provided in an embodiment of the present application. Method 500 may include steps S501 to S502.

[0135] S501: A first terminal device receives Q reporting resource indications and N reference signals, where N is an integer greater than or equal to 2.

[0136] Optionally, the reference signal is a CSI-RS. It should be noted that the following description takes the reference signal being a CSI-RS as an example, and this application does not specifically limit the reference signal, and the reference signal may also be other reference signals such as a DMRS.

[0137] The N CSI-RSs may belong to M groups of CSI-RSs, where M is an integer greater than or equal to 2, and N is an integer greater than or equal to M.

[0138] Optionally, the above-mentioned M groups of CSI-RS may refer to M CSI-RS resources, and multiple CSI-RSs in each group may correspond to multiple ports in one CSI-RS resource; the Q reporting resource indications may be configured by Q network devices.

[0139] S502, the first terminal device sends the qth second reporting information to the corresponding network device on the qth reporting resource.

[0140] The qth second reporting information can be used to indicate the top X channels with the highest priority obtained according to the first sorting rule in the qth channel matrix. q elements, the qth channel matrix may be determined according to part of the N CSI-RSs, and q is a positive integer less than or equal to Q.

[0141] Among them, the above-mentioned corresponding network device can indicate the CSI-RS resource used for the first terminal device to measure and determine the qth channel matrix, and the CSI-RS resource corresponds to a part of M groups of N CSI-RSs.

[0142] For example, in a scenario of two network devices (including a first network device and a second network device) and two reporting resource indications, step S502 can be expressed as: the first terminal device sends the first second reporting information to the first network device on the first reporting resource, and sends the second second reporting information to the second network device on the second reporting resource, the first second reporting information is used to indicate the first X1 elements with the highest priority obtained in the first channel matrix according to the first sorting rule, and the second second reporting information is used to indicate the first X2 elements with the highest priority obtained in the second channel matrix according to the first sorting rule.

[0143] In a possible implementation, when N CSI-RSs belong to M groups of CSI-RSs, the qth second reporting information includes: the top X highest priority in the qth channel matrix q The corresponding relationship between elements and M groups of N CSI-RSs.

[0144] Optionally, the above correspondence may be indicated using a bitmap.

[0145] Optionally, the qth second reporting information includes: the top x highest priority q The amplitude and phase of each element.

[0146] In a possible implementation, the qth channel matrix can be understood as being used to indicate the channel correlation of multiple terminal devices and the first terminal device with respect to Q-1 network devices, where the Q-1 network devices do not include the network device corresponding to the qth reporting resource. The qth second reporting information can be used to indicate the top X highest priority obtained according to the first sorting rule in the qth channel matrix. q The element can be understood as: the qth second reporting information is used to indicate all or part of the channel correlations of multiple terminal devices and the first terminal device regarding Q-1 network devices, and the multiple terminal devices include the first terminal device.

[0147] For example, in a scenario of two network devices (including: a first network device and a second network device) and two terminal devices (including a first terminal device and a second terminal device), the first channel matrix may include some or all of the following correlations: the channel autocorrelation of the first terminal device with respect to the second network device, denoted as And the channel correlation between the first terminal device and the second terminal device about the second network device is recorded as The second channel matrix may include part or all of the following correlations: the channel autocorrelation of the first terminal device with respect to the first network device, denoted as The channel correlation between the first terminal device and the second terminal device with respect to the first network device is recorded as

[0148] For example, when the first terminal device sends the first second reporting information on the first reporting resource, that is, and The first terminal device sends the second second reporting information on the second reporting resource, that is, and When , the first channel matrix can be The second channel matrix can be

[0149] In addition, in another implementation, each of the multiple terminal devices may transmit multiple data streams, that is, the SU weight of each terminal device may have multiple columns, and each column may be used to weight a certain CSI-RS port.

[0150] Optionally, X qIt can be indicated by RRC, and can be configured together with the qth reporting resource, or can be configured separately.

[0151] Steps S501 to S502 introduce the specific process of the first terminal device sending the qth second reporting information on the qth reporting resource. Similarly, other terminal devices among the multiple terminal devices can also send multiple different second reporting information to the corresponding network device on different reporting resources. The specific reporting process will be introduced in conjunction with Figures 6 and 7 and will not be repeated here.

[0152] When multiple terminal devices each send the qth second reporting information in the qth reporting resource, the network device can determine the multi-user weights of the multiple terminal devices (including the first terminal device) based on the received multiple second reporting information. In this way, the network device can obtain the channel information corresponding to other network devices required to calculate the weights through the air interface. In this way, although the weights are calculated individually between network devices, they are equivalent to the CJT weights calculated jointly by multiple network devices, thereby improving the performance of the network device in CJT transmission.

[0153] The method 400 and the method 500 are described in detail below with reference to FIG. 6 and FIG. 7 .

[0154] As shown in Figure 6, BS1 and BS2 can jointly provide services for UE1, UE2, and UE3. The M network devices in method 400 or method 500 may include BS1 and BS2, and the multiple terminal devices in method 400 or method 500 may include UE1, UE2, and UE3.

[0155] First, BS1 and BS2 can obtain the SU weights of all UEs. In one implementation, BS1 and BS2 can send CSI-RS without precoding. Each UE (including: UE1, UE2 and UE3) can estimate the joint channel and report the SU weight obtained by SVD decomposition to BS1 and BS2. Taking UE1 (which can be the first terminal device in method 400 or method 500) as an example, UE1 can estimate the joint channel [H 11 H 21 ], the SU weights obtained by SVD decomposition The component V in 11 Report to BS1 and convert the component V 21 Report to BS2, and UE1 can obtain the value of U1∑1 for subsequent use. In another implementation, when UE1 sends a sounding reference signal (SRS), BS1 and BS2 can estimate H 11 and H 21 , and then get V11 and V 21 .

[0156] Then, BS1 and BS2 can send a CSI-RS with precoding (which can be one of the reference signals in method 400 and method 500), wherein the CSI-RS with precoding can be determined based on the SU weights of all UEs coordinated between base stations. Specifically, BS1 can set the SU weights V of UE1 to UE3 to 11 、V 12 and V 13 As precoding loaded on different CSI-RS ports (which may correspond to three CSI-RSs in a group of CSI-RSs in methods 400 and 500), similarly, BS2 can 21 、V 22 and V 23 The precoding is loaded on different CSI-RS ports (which may correspond to three CSI-RSs in another group of CSI-RSs in methods 400 and 500).

[0157] After receiving the precoded CSI-RS, the UE can perform a correlation measurement of the terminal device, such as the correlation between UE1 and UE2 with respect to BS1. For example, UE1 can measure the equivalent channel H on the corresponding CSI-RS port. 11 V 12 , and then process the above equivalent channel according to U1Σ1 obtained in the process of SU weight acquisition to obtain the channel correlation. Specifically, UE1 can use the equivalent channel obtained by the inverse left multiplication of U1Σ1, that is, the correlation can be obtained In the same way, UE1 can measure the correlation measurement results of all interfering UEs under BS1 and BS2.

[0158] After completing the correlation measurement, the UE can report the correlation of the neighboring station. Taking UE1 as an example, UE1 can report the correlation of each UE with respect to BS2 to BS1, including: and At the same time, UE1 can report the relevance of each UE to BS1 to BS2, including: and In method 400, the above example may correspond to X=6, that is, the first terminal device needs to report all the correlations to the two network devices. In method 500, the above example may correspond to the first network device and the second network device respectively configuring a reporting resource, and configuring X1=X2=3, and the first terminal device reports to the first network device and The first terminal device reports to the second network device and

[0159] Similarly, UE2 and UE3 may also perform similar correlation reporting. The first reporting information in method 400 or the qth second reporting information in method 500 may include the channel correlation of each UE with respect to BS1 or the channel correlation of each UE with respect to BS2.

[0160] The following describes a method for calculating multi-user weights after the BS collects the correlation reported by each UE with reference to FIG. 7 .

[0161] FIG7 is a diagram showing the weight W calculated by BS1 to UE1, UE2 and UE3 based on the correlation reported by each UE. 11 、W 12 and W 13 Take an example for illustration, wherein BS1 may be the first network device in method 400 and method 500 .

[0162] BS1 can summarize the collected UE correlations into a matrix as shown in FIG7 , in which the correlations reported by UE1, UE2 and UE3 constitute the columns of the matrix. When calculating the weights corresponding to UE1, UE2 and UE3, they can be retrieved and applied row by row.

[0163] In an embodiment of the present application, in a scenario of a non-ideal backhaul link, BS1 and BS2 can determine the multi-user weights corresponding to UE1 to UE3 without real-time information interaction, thereby improving the performance of CJT transmission between BS1 and BS2.

[0164] The following specifically introduces a communication scenario in which multiple base stations jointly serve multiple terminal devices. Methods 400 and 500 can be applied to this scenario.

[0165] In this scenario, assuming there are K UEs and B BSs, where K and B are positive integers, the following definitions can be made:

[0166] (1) For UE k, the set of base station numbers that provide CJT services is is a subset of the BS set {1, 2, ..., B}. The M network devices in method 400 and method 500 can be represented as

[0167] (2) For BS b, the set of UEs it serves is is a subset of the UE set {1,2,…,K}, if BS UE

[0168] (3) It can represent the set of all cooperative UEs in the UE served by BS b. If UE In addition to BS b, other BSs serving UE k are also included, wherein the multiple terminal devices in methods 400 and 500 can be represented as

[0169] Based on the definition of the above symbols, if BS Then the weight sent by BS b to UE k can be expressed as:

[0170] From the above formula we can get:

[0171] In the stage of sending precoded CSI-RS, BS b needs to use different ports or CSI-RS resources to load The weights of all UEs in BS b, namely V bk ,in For UE k, it will receive data from other serving base stations. The sent CSI-RS with precoding. If UE k and UE All are collections , then UE k needs to report to BS b At the same time, you need to submit Report

[0172] In the above process, the base station side can configure measurement and reporting resources for each UE, wherein the same base station can use different CSI-RS resources to carry the precoded CSI-RS corresponding to different UEs, different base stations can use different CSI-RS resources to carry the precoded CSI-RS, or the same base station uses a combination of different CSI-RS resources and port groups to carry the precoded CSI-RS corresponding to different UEs, and different base stations can use different CSI-RS resources to carry the precoded CSI-RS. Among them, in the same CSI-RS resource mentioned above, different UEs can be represented by different port groups. In addition, in order to save reporting overhead, the base station can configure the maximum number of correlations that the UE can report (i.e., X in the corresponding method 400), and accordingly, the UE can report according to the maximum number of reportable correlations configured by the base station.

[0173] It should be understood that in the various embodiments of the present application, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between the various embodiments are consistent and can be referenced by each other, and the technical features in different embodiments can be combined to form new embodiments according to their internal logical relationships.

[0174] The embodiments of the present application also provide an apparatus for implementing any of the above methods, wherein the apparatus includes a unit corresponding to executing each step in implementing any of the above methods.

[0175] Figure 8 is a schematic diagram of a channel information transmission device 800 provided in an embodiment of the present application. The device 800 may include a receiving unit 810, a sending unit 820, and a processing unit 830. The receiving unit 810 is used to receive instructions and / or data, and the sending unit 820 is used to send instructions and / or data. The receiving unit 810 and the sending unit 820 may also be referred to as communication interfaces, communication units, or transceiver units. The processing unit 830 is used to perform data processing so that the device 800 implements the aforementioned channel information transmission method.

[0176] Optionally, the apparatus 800 further includes a storage unit configured to implement a corresponding storage function and store corresponding instructions and / or data.

[0177] As a design, the device 800 can perform the actions performed by any terminal device in the above method embodiments.

[0178] In one possible implementation, the apparatus 800 includes: a receiving unit 810, a sending unit 820, and a processing unit 830; the receiving unit 810 is configured to receive N reference signals; the processing unit 830 is configured to determine first reporting information based on the N reference signals, where the first reporting information is used to indicate the first X elements with the highest priority obtained in the first channel matrix according to the first sorting rule; and the sending unit 820 is configured to send the first reporting information, where N and X are integers greater than or equal to 2.

[0179] In a possible implementation, N reference signals belong to M groups of reference signals, and the first reporting information includes: a correspondence between X elements and M groups of N reference signals, where M is an integer greater than or equal to 2, and N and X are greater than or equal to M.

[0180] In a possible implementation, the corresponding relationship is a bitmap.

[0181] In a possible implementation, the first reporting information further includes amplitudes and phases corresponding to the X elements.

[0182] In a possible implementation, the N reference signals are obtained by weighting a single-user weight of one of the multiple terminal devices in one of the multiple network devices.

[0183] In a possible implementation, the reference signal is a CSI-RS.

[0184] In one possible implementation, the apparatus 800 includes: a receiving unit 810, a sending unit 820, and a processing unit 830; the receiving unit 810 is configured to receive Q reporting resource indications and N reference signals; the processing unit 830 is configured to determine the qth second reporting information based on a portion of the N reference signals, the qth second reporting information being used to indicate the top X highest priority channels obtained in the qth channel matrix according to the first sorting rule. q elements; N and X q are all integers greater than or equal to 2, and q is less than or equal to Q.

[0185] In a possible implementation, N reference signals belong to M groups of reference signals, and the qth second reporting information includes: X q The corresponding relationship between elements and M groups of N reference signals, M is greater than or equal to 2, N and X q Greater than or equal to M.

[0186] In a possible implementation, the corresponding relationship is a bitmap.

[0187] In a possible implementation, the qth second reporting information further includes: X q The amplitude and phase of each element.

[0188] In a possible implementation, the N reference signals are obtained by weighting a single-user weight of one of the multiple terminal devices in one of the multiple network devices.

[0189] In a possible implementation, the reference signal is N CSI-RSs.

[0190] As a design, the device 800 can perform the actions performed by any network device in the above method embodiments.

[0191] In one possible implementation, the apparatus 800 includes: the apparatus includes: a receiving unit 810 and a processing unit 830; the receiving unit 810 is used to receive multiple first reporting information sent from multiple terminal devices, where one first reporting information among the multiple first reporting information is used to indicate the top X elements with the highest priority obtained according to a first sorting rule in a first channel matrix of one of the multiple terminal devices, where the first channel matrix is ​​determined based on N reference signals, and N and X are both integers greater than or equal to 2; the processing unit 830 is used to determine multi-user weights of the multiple terminal devices based on the multiple first reporting information.

[0192] In one possible implementation, N reference signals belong to M groups of reference signals, and one first reporting information among the multiple first reporting information includes: a correspondence between the first X elements with the highest priority and the N reference signals in the M groups, where M is an integer greater than or equal to 2, and N and X are greater than or equal to M.

[0193] In a possible implementation manner, one of the multiple first reporting information further includes: amplitudes and phases corresponding to the X elements.

[0194] In a possible implementation, the corresponding relationship is a bitmap.

[0195] In a possible implementation, the N reference signals are obtained by weighting a single-user weight of one of the multiple terminal devices in one of the multiple network devices.

[0196] In a possible implementation, the N reference signals are N CSI-RSs.

[0197] In one possible implementation, the apparatus 800 includes: a receiving unit 810 and a processing unit 830; the receiving unit 810 is configured to receive a plurality of second reporting information sent from a plurality of terminal devices, wherein the plurality of second reporting information includes the qth second reporting information received by one of the plurality of terminal devices on the qth reporting resource, and the qth second reporting information is used to indicate the top X highest priority channels in the qth channel matrix obtained according to the first sorting rule. q elements, the qth channel matrix is ​​determined based on part of the N reference signals, the qth reporting resource belongs to the reporting resource indicated by the Q reporting resources, N and X q are all integers greater than or equal to 2, and q is less than or equal to Q; the processing unit 830 is used to determine the multi-user weights of multiple terminal devices according to the multiple second reporting information.

[0198] In a possible implementation, N reference signals belong to M groups of reference signals, and the qth second reporting information includes a correspondence between X elements and N first reference signals in M ​​groups, where M is greater than or equal to 2, and N and X are q Greater than or equal to M.

[0199] In a possible implementation, the corresponding relationship is a bitmap.

[0200] In a possible implementation, the qth second reporting information further includes: X q The amplitude and phase of each element.

[0201] In a possible implementation, the N reference signals are obtained by weighting a single-user weight of one of the multiple terminal devices in one of the multiple network devices.

[0202] In a possible implementation, the reference signal is a CSI-RS.

[0203] FIG9 is a schematic diagram of another channel information transmission device 900 provided in an embodiment of the present application.

[0204] The apparatus 900 includes a memory 910, a processor 920, and a communication interface 930. The memory 910, processor 920, and communication interface 930 are connected via an internal connection path. The memory 910 is used to store instructions, and the processor 920 is used to execute the instructions stored in the memory 910 to control the communication interface 930 to obtain information or enable the apparatus 900 to implement the aforementioned channel information transmission method. Optionally, the memory 910 can be coupled to the processor 920 via an interface or integrated with the processor 920.

[0205] It should be noted that the communication interface 930 may be a transceiver such as, but not limited to, a transceiver. The communication interface 930 may also include an input / output interface.

[0206] The processor 920 stores one or more computer programs, which include instructions. When the instructions are executed by the processor 920, the apparatus 900 executes the channel information transmission method in each of the above embodiments.

[0207] During implementation, each step of the above method can be completed by an integrated logic circuit of the hardware in the processor 920 or by instructions in the form of software. The method disclosed in conjunction with the embodiments of the present application can be directly embodied as being executed by a hardware processor, or can be executed by a combination of hardware and software modules in the processor. The software module can be located in a mature storage medium in the art, such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 910, and the processor 920 reads the information in the memory 910 and completes the steps of the above method in combination with its hardware. To avoid repetition, it will not be described in detail here.

[0208] Optionally, the communication interface 930 in FIG. 9 may implement the receiving unit 810 and the sending unit 820 in FIG. 8 , and the processor 920 in FIG. 9 may implement the processing unit 830 in FIG. 8 .

[0209] An embodiment of the present application further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a program code. When the computer program code is executed on a computer, the computer executes any one of the methods in FIG. 1 to FIG. 7 .

[0210] An embodiment of the present application further provides a computer program product, which includes a computer program. When the computer program is executed, the computer executes any one of the methods in Figures 1 to 7 above.

[0211] An embodiment of the present application further provides a chip, comprising: a circuit, wherein the circuit is used to execute any one of the methods in FIG. 1 to FIG. 7 above.

[0212] An embodiment of the present application also provides a terminal device, including any one of the channel information transmission devices in Figure 8 or Figure 9.

[0213] An embodiment of the present application further provides a network device, comprising any one of the channel information transmission devices in FIG. 8 or FIG. 9 .

[0214] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0215] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0216] 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 merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0217] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0218] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0219] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0220] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A method for transmitting channel information, characterized in that: The method comprises: Receiving N reference signals; Send first reporting information, where the first reporting information is used to indicate the first X elements with the highest priority obtained in the first channel matrix according to the first sorting rule, where the first channel matrix is ​​determined according to the N reference signals, and N and X are both integers greater than or equal to 2.

2. The method according to claim 1, characterized in that The N reference signals belong to M groups of reference signals, and the first reporting information includes: a correspondence between the X elements and the N reference signals in the M groups, where M is an integer greater than or equal to 2, and N and X are greater than or equal to M.

3. The method according to claim 2, characterized in that The corresponding relationship is indicated by a bitmap.

4. The method according to claim 2 or 3, characterized in that The first reporting information also includes: amplitudes and phases corresponding to the X elements.

5. The method according to any one of claims 1 to 4, characterized in that Each of the N reference signals is obtained by weighting a single user weight of a terminal device in a network device in a plurality of network devices.

6. The method according to any one of claims 1 to 5, characterized in that The reference signal is a channel state information reference signal CSI-RS.

7. A method for transmitting channel information, characterized in that: The method comprises: Receiving multiple first reporting information sent from multiple terminal devices, one of the multiple first reporting information is used to indicate the first X elements with the highest priority obtained according to a first sorting rule in a first channel matrix of one of the multiple terminal devices, where the first channel matrix is ​​determined according to N reference signals, and N and X are both integers greater than or equal to 2; Determine multi-user weights of the multiple terminal devices according to the multiple first reporting information.

8. The method according to claim 4, characterized in that The N reference signals belong to M groups of reference signals, and one first reporting information among the multiple first reporting information includes: a correspondence between the X elements and the N reference signals in the M groups, where M is an integer greater than or equal to 2, and N and X are greater than or equal to M.

9. The method according to claim 8, characterized in that The corresponding relationship is indicated by a bitmap.

10. The method according to claim 8 or 9, characterized in that The first reporting information among the multiple reporting information further includes: amplitudes and phases corresponding to the first X elements.

11. The method according to any one of claims 7 to 10, characterized in that Each of the N reference signals is obtained by weighting a single-user weight of a terminal device in a network device in a plurality of network devices among the plurality of terminal devices.

12. The method according to any one of claims 7 to 11, characterized in that The reference signal is a channel state information reference signal CSI-RS.

13. A method for transmitting channel information, characterized in that: The method comprises: Receiving Q reporting resource indications and N reference signals; Sending the qth second reporting information on the qth reporting resource, wherein the qth second reporting information is used to indicate the top X channels with the highest priority obtained according to the first sorting rule in the qth channel matrix q elements, the qth channel matrix is ​​determined according to some reference signals in the N reference signals, N and X q are all integers greater than or equal to 2, and q is less than or equal to Q.

14. The method according to claim 13, characterized in that The N reference signals belong to M groups of reference signals, and the qth second reporting information includes: q The corresponding relationship between the elements and the M groups of N reference signals, M is an integer greater than or equal to 2, N and X q Greater than or equal to M.

15. The method according to claim 14, characterized in that The corresponding relationship is indicated by a bitmap.

16. The method according to claim 14 or 15, characterized in that The qth second reporting information also includes: q The amplitude and phase of each element.

17. The method according to any one of claims 13 to 16, characterized in that Each of the N reference signals is obtained by weighting a single user weight of a terminal device in a network device in a plurality of network devices.

18. The method according to any one of claims 13 to 17, characterized in that The reference signal is a channel state information reference signal CSI-RS.

19. A method for transmitting channel information, characterized in that: The method comprises: receiving a plurality of second reporting information sent from a plurality of terminal devices, the plurality of second reporting information including a qth second reporting information received by a terminal device in the plurality of terminal devices on a qth reporting resource, the qth second reporting information being used to indicate the top X channels with the highest priority obtained according to the first sorting rule in the qth channel matrix; q elements, the qth channel matrix is ​​determined according to some reference signals in the N reference signals, the qth reporting resource belongs to one of the reporting resources indicated by the Q reporting resources, N and X q are all integers greater than or equal to 2, and q is less than or equal to Q; Determine multi-user weights of the multiple terminal devices according to the multiple second reporting information.

20. The method of claim 19, wherein: The N reference signals belong to M groups of first reference signals, and the qth second reporting information includes the X q The corresponding relationship between the elements and the M groups of N reference signals, M is an integer greater than or equal to 2, N and X q Greater than or equal to M.

21. The method of claim 20, wherein: The corresponding relationship is indicated by a bitmap.

22. The method according to claim 20 or 21, characterized in that The qth second reporting information also includes: q The amplitude and phase of each element.

23. The method according to any one of claims 19 to 22, characterized in that The N reference signals are obtained by weighting a single user weight of a terminal device among the multiple terminal devices and a network device among the multiple network devices.

24. The method according to any one of claims 19 to 23, characterized in that The reference signal is a channel state information reference signal CSI-RS.

25. A device for transmitting channel information, characterized in that: The device comprises: a receiving unit, a sending unit and a processing unit; The receiving unit is used to receive N reference signals; The processing unit is used to determine first reporting information according to the N reference signals, where the first reporting information is used to indicate the first X elements with the highest priority obtained according to the first sorting rule in the first channel matrix, where N and X are both integers greater than or equal to 2; The sending unit is used to send the first reporting information.

26. The device according to claim 25, characterized in that The N reference signals belong to M groups of first reference signals, and the first reporting information includes: a correspondence between the X elements and the N reference signals in the M groups, where M is an integer greater than or equal to 2, and N and X are greater than or equal to M.

27. The device according to claim 26, characterized in that The corresponding relationship is indicated by a bitmap.

28. The device according to claim 26 or 27, characterized in that The first reporting information also includes: amplitudes and phases corresponding to the X elements.

29. The device according to any one of claims 25 to 28, characterized in that Each of the N reference signals is obtained by weighting a single user weight of a terminal device in a network device in a plurality of network devices.

30. The device according to any one of claims 25 to 29, characterized in that The reference signal is a channel state information reference signal CSI-RS.

31. A channel transmission device, characterized in that: The device comprises: a receiving unit and a processing unit; The receiving unit is configured to receive a plurality of first reporting information sent from a plurality of terminal devices, wherein one of the plurality of first reporting information is used to indicate first X elements with the highest priority obtained according to a first sorting rule in a first channel matrix of a terminal device among the plurality of terminal devices, wherein the first channel matrix is ​​determined according to N reference signals, and N and X are both integers greater than or equal to 2; The processing unit is used to determine the multi-user weights of the multiple terminal devices according to the multiple first reporting information.

32. The device according to claim 31, characterized in that The N reference signals belong to M groups of first reference signals, and one first reporting information among the multiple first reporting information includes: a correspondence between the X elements and the N first reference signals in the M groups, where M is an integer greater than or equal to 2, and N and X are greater than or equal to M.

33. The device according to claim 32, characterized in that The corresponding relationship is indicated by a bitmap.

34. The device according to claim 32 or 33, characterized in that The first reporting information among the multiple reporting information further includes: amplitudes and phases corresponding to the X elements.

35. The device according to any one of claims 31 to 34, characterized in that The N reference signals are obtained by weighting a single user weight of a terminal device among the multiple terminal devices and a network device among the multiple network devices.

36. The device according to any one of claims 31 to 35, characterized in that The reference signal is a channel state information reference signal CSI-RS.

37. A channel transmission device, characterized in that: The device comprises: a receiving unit, a sending unit and a processing unit; The receiving unit is used to receive Q reporting resource indications and N reference signals; The processing unit is used to determine the qth second reporting information according to the N reference signals, wherein the qth second reporting information is used to indicate the top X channels with the highest priority obtained according to the first sorting rule in the qth channel matrix. q elements, N and X q are all integers greater than or equal to 2, and q is less than or equal to Q; The sending unit is used to send the qth second reporting information on the qth reporting resource.

38. The device according to claim 37, characterized in that The N reference signals belong to M groups of first reference signals, and the qth second reporting information includes: q The corresponding relationship between the elements and the M groups of N reference signals, M is an integer greater than or equal to 2, N and X q Greater than or equal to M.

39. The device according to claim 38, characterized in that The corresponding relationship is indicated by a bitmap.

40. The device according to claim 37 or 39, characterized in that The qth second reporting information also includes: q The amplitude and phase of each element.

41. The device according to any one of claims 37 to 40, characterized in that The N reference signals are obtained by weighting a single user weight of a terminal device in a network device in a plurality of network devices.

42. The device according to any one of claims 37 to 41, characterized in that The reference signal is a channel state information reference signal CSI-RS.

43. A channel transmission device, characterized in that: The device comprises: a receiving unit and a processing unit; The receiving unit is configured to receive a plurality of second reporting information sent from a plurality of terminal devices, wherein the plurality of second reporting information includes the qth second reporting information received by one of the plurality of terminal devices on the qth reporting resource, wherein the qth second reporting information is used to indicate the top X channels with the highest priority obtained according to the first sorting rule in the qth channel matrix. q elements, the qth channel matrix is ​​determined according to some reference signals in the N reference signals, the qth reporting resource belongs to one of the reporting resources indicated by the Q reporting resources, N and X q are all integers greater than or equal to 2, and q is less than or equal to Q; The processing unit is used to determine the multi-user weights of the multiple terminal devices according to the multiple second reporting information.

44. The device according to claim 43, characterized in that The N reference signals belong to M groups of reference signals, and the qth second reporting information includes the X q The corresponding relationship between the elements and the M groups of N reference signals, M is an integer greater than or equal to 2, N and X q Greater than or equal to M.

45. The device according to claim 44, characterized in that The corresponding relationship is indicated by a bitmap.

46. ​​The device according to claim 44 or 45, characterized in that The qth second reporting information also includes: q The amplitude and phase of each element.

47. The device according to any one of claims 43 to 46, characterized in that The N reference signals are obtained by weighting a single user weight of a network device among the multiple network devices by a terminal device among the multiple terminal devices.

48. The device according to any one of claims 43 to 47, characterized in that The N reference signals are N channel state information reference signals CSI-RS.

49. A device for transmitting channel information, characterized in that: include: A processor and a memory, wherein the processor is coupled to the memory and configured to read and execute instructions in the memory to perform the method according to any one of claims 1 to 24.

50. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a program code, and when the computer program code is executed on a computer, the computer is caused to perform the method according to any one of claims 1 to 24.

51. A chip, characterized in that: include: A circuit for executing the method according to any one of claims 1 to 24.

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