Feedback methods, equipment, terminals, and network-side equipment for PMI in multi-TRP transmission

Abstract

The present application discloses a method for feedback of PMI in multi-TRP transmission, a terminal, and a network side device, which belong to the field of wireless communication. The method for feedback of PMI in multi-TRP transmission in an embodiment of the present application includes: a terminal determines an orthogonal beam group set corresponding to each TRP based on target parameters configured by the network side for multiple TRPs for which joint transmission is allowed; based on channel information of each TRP, selects a target orthogonal beam group corresponding to the TRP from the orthogonal beam group set corresponding to each TRP, and selects a predetermined number of target orthogonal beams corresponding to each TRP from the target orthogonal beam group; determines a first feedback parameter for feeding back the target orthogonal beam groups corresponding to the multiple TRPs and a second feedback parameter for feeding back a predetermined number of target orthogonal beams in each target orthogonal beam group; and the terminal transmits PMI parameters including the first feedback parameter and the second feedback parameter.

Description

[Technical Field]

[0001] (Cross-reference of related applications) This application claims priority to the Chinese patent application submitted to the China National Patent Office on April 25, 2022, with application number 202210442243.5, and titled "Method for PMI Feedback in Multi-TRP Transmission, Terminal and Network-Side Equipment," and the Chinese patent application submitted to the China National Patent Office on October 9, 2022, with application number 202211228519.6, and titled "Method for PMI Feedback in Multi-TRP Transmission, Terminal and Network-Side Equipment," and all contents of these applications are incorporated into this application by reference.

[0002] This application belongs to the field of wireless communication technology and specifically relates to a feedback method for precoding matrix indicators (PMI) in multi-transmission reception point (TRP) transmission, as well as terminals and network-side equipment. [Background technology]

[0003] Coordinated Multiple Points (CoMP) transmission involves multiple geographically separated transmission and reception points (TRPs) coordinating their participation in data transmission for a single terminal or in the coordinated reception of data transmitted by a single terminal. These cooperating transmission points typically refer to base stations in different cells. Through the cooperation of multiple cell base stations, interference signals can be utilized as useful signals, thereby reducing inter-cell interference and improving the system's spectral utilization rate.

[0004] Each common CoMP (Coordinated Beamforming) scheme can be classified into one of two types: Joint Processing (JP) or Collaborative Scheduling (CS) / Coordinated Beamforming (CB).

[0005] Here, joint processing (JP) means that data from one terminal (User Equipment, UE) is available on one or more time-frequency resource points in the CoMP cooperation set, and includes the following:

[0006] (1) Joint Transmission (JT). For example, data is transmitted simultaneously from multiple points (part of or the entire CoMP cooperation set) to one UE or multiple UEs in one time-frequency resource. Or, data is transmitted simultaneously from multiple points to a UE to improve, for example (coherently or uncoherently), the received signal quality and / or data throughput.

[0007] (2) Dynamic Point Selection (DPS) / Frequency Modulation. Data is transmitted from one point (within a CoMP cooperation set) within a single time-frequency resource. The transmit / mix point can change from one subframe to another, including changes on a Radio Bearer (RB) pair within a single subframe. Data is available simultaneously on multiple points. Dynamic Point Selection / Frequency Modulation may include Dynamic Cell Selection (DCS).

[0008] (3) A combination of DPS and JT. In such cases, data transmission can be performed by selecting multiple points from the time-frequency resource. Cooperative scheduling / beamforming (CS / CB) means that for a given time-frequency resource, the UE's data is available on only one point in the CoMP cooperation set and is transmitted from this point (downlink (DL) data transmission starts from this point), but the user scheduling / beamforming decision is made in coordination among the points corresponding to the CoMP cooperation set. The selection of the launch point is semi-static, i.e., semi-persistent point selection (SSPS), meaning that the launch point can only be changed in a semi-static manner each time data is transmitted from one point to one specific UE.

[0009] In related technologies, considering the overhead problem of precoding matrix indicator (PMI) feedback, the codebook design incorporates frequency domain compression, extends the maximum number of supported ranks to 4, and adds a distribution of non-zero coefficients indicating PMI feedback using a bitmap method. Here, the codebook generation for each layer may also be expressed by the following equation:

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[0010] However, since the current codebook parameter definitions and parameter values ​​are primarily based on the PMI of a single TRP, the feedback methods for PMI parameters in related technologies are not applicable to scenarios where multiple TRPs cooperate in transmission. [Overview of the project] [Problems that the invention aims to solve]

[0011] The embodiments of this application provide a PMI feedback method, terminal, and network-side equipment for multi-TRP transmission that can solve the problem that PMI parameter feedback methods in related technologies are not applicable to scenarios in which multiple TRPs cooperate in transmission. [Means for solving the problem]

[0012] A first aspect provides a PMI feedback method for multi-TRP transmission, the method comprising: a terminal determining an orthogonal beamgroup set corresponding to each TRP based on target parameters configured by the network side for a plurality of TRPs for which joint transmission is permitted; selecting a target orthogonal beamgroup corresponding to each TRP from the orthogonal beamgroup set corresponding to each TRP, and selecting a predetermined number of target orthogonal beams corresponding to each TRP from the target orthogonal beamgroups, based on channel information for each TRP; determining a first feedback parameter for feedbacking the target orthogonal beamgroups corresponding to the plurality of TRPs and a second feedback parameter for feedbacking the predetermined number of target orthogonal beams in each of the target orthogonal beamgroups, wherein the first feedback parameter includes a first combination number indicating the target orthogonal beamgroups corresponding to the plurality of TRPs, and / or the second feedback parameter includes a second combination number indicating the predetermined number of target orthogonal beams in each of the target orthogonal beamgroups; and the terminal transmitting a PMI parameter including the first feedback parameter and the second feedback parameter.

[0013] A second aspect provides a PMI feedback device for multi-TRP transmission, the device comprising: a first determination module for determining an orthogonal beam group set corresponding to each TRP based on target parameters configured by the network side for a plurality of TRPs for which joint transmission is permitted; a selection module for selecting a target orthogonal beam group corresponding to each TRP from the orthogonal beam group set corresponding to each TRP and a predetermined number of target orthogonal beams corresponding to each TRP from the target orthogonal beam group, based on channel information for each TRP; a second determination module for determining a first feedback parameter for feeding back the target orthogonal beam groups corresponding to a plurality of TRPs and a second feedback parameter for feeding back the predetermined number of target orthogonal beams in each of the target orthogonal beam groups, wherein the first feedback parameter includes a first combination number indicating the target orthogonal beam groups corresponding to a plurality of TRPs, and / or the second feedback parameter includes a second combination number indicating the predetermined number of target orthogonal beams in each of the target orthogonal beam groups; and a first transmission module for transmitting a PMI parameter including the first feedback parameter and the second feedback parameter.

[0014] A third aspect provides a method for obtaining a PMI for multi-TRP transmission, the method comprising: a network-side device instructing a terminal of target parameters for a plurality of TPRs for which joint transmission is permitted; receiving a PMI parameter transmitted by the terminal, the PMI parameter including a first feedback parameter and a second feedback parameter, wherein the first feedback parameter includes a first combination number indicating target orthogonal beam groups corresponding to the plurality of TRPs, and / or the second feedback parameter includes a second combination number indicating a predetermined number of target orthogonal beams in each of the target orthogonal beam groups; and the network-side device obtaining a PMI for each of the TRPs based on the PMI parameter.

[0015] A fourth aspect provides a PMI acquisition device for multi-TRP transmission, the device comprising: a second transmitting module for instructing a terminal of target parameters for a plurality of TPRs that are permitted to be jointly transmitted; a receiving module for receiving PMI parameters transmitted by the terminal, the receiving module comprising a first feedback parameter and a second feedback parameter, wherein the first feedback parameter comprises a first combination number indicating target orthogonal beam groups corresponding to a plurality of TRPs, and / or the second feedback parameter comprises a second combination number indicating a predetermined number of target orthogonal beams in each of the target orthogonal beam groups; and an acquisition module for acquiring the PMI of each TRP based on the PMI parameters.

[0016] A fifth aspect provides a terminal comprising a processor and memory, the memory storing a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method of the first aspect are realized.

[0017] A sixth aspect provides a terminal comprising a processor and a communication interface, wherein the processor is used to implement a step of the method described in the first aspect, and the communication interface is used to communicate with an external device.

[0018] A seventh aspect provides a network-side device which includes a processor and memory, the memory storing a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method of the third aspect are realized.

[0019] The eighth aspect provides a network-side device, which includes a processor and a communication interface, wherein the processor is used to implement the steps of the method described in the third aspect, and the communication interface is used to communicate with an external device.

[0020] The ninth aspect provides a PMI feedback system for multi-TRP transmission, the system comprising a terminal and network-side equipment, the terminal being used to perform a step of the method described in the first aspect, and the network-side equipment being used to perform a step of the method described in the third aspect.

[0021] The tenth aspect provides a readable storage medium in which a program or instruction is stored, and when the program or instruction is executed by a processor, a step of the method of the first aspect or a step of the method of the third aspect is realized.

[0022] An eleventh aspect provides a chip comprising a processor and a communication interface, the communication interface being coupled with the processor, the processor being used to run a program or instructions, to implement a step of the method according to the first aspect, or to implement a step of the method according to the third aspect.

[0023] The tenth-second aspect provides a computer program / program product which is stored in a storage medium and is executed by at least one processor to realize a step of the method of the first aspect or a step of the method of the third aspect. [Effects of the Invention]

[0024] In the embodiments of this application, the terminal acquires a set of orthogonal beam groups corresponding to each TRP based on target parameters configured by the network side for multiple TRPs for which joint transmission is permitted, further selects a target orthogonal beam group corresponding to each TRP based on the channel information of each TRP, selects multiple target orthogonal beams corresponding to each TRP from each of the target orthogonal beam groups, determines a first feedback parameter for feeding back the target orthogonal beam group corresponding to each TRP and a second feedback parameter for feeding back the predetermined number of target orthogonal beams in each of the target orthogonal beam groups, and transmits a PMI parameter including the first and second feedback parameters, thereby feeding back the PMI parameter in the case of multi-TRP joint transmission and improving the performance of multi-TRP transmission. [Brief explanation of the drawing]

[0025] [Figure 1] A block diagram of a wireless communication system to which the embodiments of this application can be applied is shown. [Figure 2] A flowchart of the PMI feedback method for multi-TRP transmission according to an embodiment of this application is shown. [Figure 3] A flowchart of the method for obtaining PMI for multi-TRP transmission according to the embodiment of this application is shown. [Figure 4]Another flowchart of the PMI feedback method for multi-TRP transmission according to the embodiment of this application is shown. [Figure 5] This diagram shows a schematic structure of a PMI feedback device for multi-TRP transmission according to an embodiment of this application. [Figure 6] This diagram shows a schematic structure of a PMI acquisition device for multi-TRP transmission according to an embodiment of this application. [Figure 7] A schematic diagram of the structure of a communication device according to an embodiment of this application is shown. [Figure 8] A schematic diagram of the hardware structure of a terminal according to the embodiment of this application is shown. [Figure 9] A schematic diagram of the hardware structure of the network-side equipment according to the embodiment of this application is shown. [Modes for carrying out the invention]

[0026] The following clearly describes the technical concepts in the embodiments of this application, linking them to the drawings of the embodiments. Clearly, the embodiments described are only some, not all, embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are all within the scope of protection of this application.

[0027] The terms "first," "second," etc., used in the specification and claims of this application are intended to distinguish similar subjects and not to describe a specific order or sequence. It should be understood that these terms are interchangeable where appropriate, so that the embodiments of this application may be carried out in an order other than those illustrated or described herein, and that the subjects distinguished by "first" and "second" are generally of the same kind and do not limit the number of subjects; for example, the first subject may be one or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected subjects, and the letter " / " generally indicates that the preceding and succeeding related subjects are in an "or" relationship.

[0028] It should be noted that the technologies described in the embodiments of this application are not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but are also applicable to other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" in the embodiments of this application are always used interchangeably, and the technologies described may be used for the systems and radio technologies mentioned above, or for other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and uses NR terminology in most of the following descriptions, but these technologies are also applicable to applications other than NR system applications, such as sixth-generation (6) radio. th It may be applied to 6G (Generation 1) communication systems.

[0029] Figure 1 shows a block diagram of a wireless communication system to which an embodiment of this application can be applied. The wireless communication system includes a terminal 11 and a network-side device 12. Here, the terminal 11 is a mobile phone, tablet personal computer, laptop computer (or notebook computer), personal digital assistant (PDA), palmtop computer, netbook, ultra-mobile personal computer (UMPC), mobile internet device (MID), augmented reality (AR) / virtual reality (VR) device, robot, wearable device, vehicle user equipment (VUE), pedestrian user equipment (PUE), smart home (home appliances with wireless communication capabilities, such as refrigerators, televisions, washing machines or furniture), game console, personal computer (personal The terminal-side equipment may be a computer (PC), a deposit machine or self-service machine, and the wearable device includes smartwatches, smart wristbands, smart earphones, smart glasses, smart accessories (smart bracelets, smart hand chains, smart rings, smart necklaces, smart ankle bracelets, smart anklets, etc.), smart bands, smart clothing, etc. It should be noted that the terminal 11 in the embodiments of this application is not limited to a specific type. The network-side equipment 12 may include access network equipment and / or core network equipment, where access network equipment may be called radio access network equipment, radio access network (RAN), radio access network function or radio access network unit.Access network equipment may include base stations, Wireless Local Area Network (WLAN) access points, or WiFi nodes, and base stations may also be called Node B, evolved Node B (eNB), access point, Base Transceiver Station (BTS), radio base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), home B node, home evolved B node, Transmission Reception Point (TRP), or any other appropriate term in the art, and as long as the same technical effect is achieved, the base station is not limited to any particular technical term. For the purposes of this explanation, the embodiments of this application only use base stations in NR systems as examples and do not limit the specific types of base stations.The core network equipment includes core network nodes, core network functions, Mobility Management Entity (MME), Access and Mobility Management Function (AMF), Session Management Function (SMF), User Plane Function (UPF), Policy Control Function (PCF), Policy and Charging Rules Function (PCRF), Edge Application Server Discovery Function (EASDF), Unified Data Management (UDM), Unified Data Repository (UDR), Home Subscriber Server (HSS), Centralized network configuration (CNC), Network Repository Function (NRF), Network Exposure Function (NEF), Local NEF (or L-NEF), Binding Support Function (BSF), and Application Functions (Application It may include, but is not limited to, at least one of the following: Function, AF, etc. It should be noted that the embodiments of this application only illustrate core network equipment in an NR system and do not limit the specific types of core network equipment.

[0030] In related technologies, the R16 Type II codebook was designed using the beam combination principle, and to address the overhead problem of PMI feedback, the R16 Type II codebook design added frequency domain compression, expanded the maximum number of supported ranks to 4, and added a distribution of non-zero coefficients that indicate PMI feedback using a bitmap method.

[0031] Here, the codebook generation for each layer may also be expressed by the following formula:

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[0032] The terminal, in PMI

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[0033] (1)

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[0034] (2)

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[0035] [Table 1]

[0036] 2) Calculation of the amplitude and phase of each tap layer

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[0037] [Table 2]

[0038] layer

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[0039]

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[0040]

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[0041] The beam index corresponding to the strongest coefficient is:

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[0042] The UE remaps each tap based on the strongest coefficient tap index

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[0043] (3)

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[0044]

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[0045] In the related technology, the PMI coefficient is i1 and i2, where i1 includes i 1,1 , i 1,2, i 1,5 , i 1,6、v , i 1,7,v , i 1,8,v , and i2 includes i 2,3,v , i 2,4,v , i 2,5,v , where v is one or more values among 1, 2, 3, 4. When the RI value is 2, v = 1, 2; when the RI value is 4, v = 1, 2, 3, 4.

[0046] Here, i 1,1 is used to indicate the orthogonal DFT vector group number,

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[0047] [Table 3]

[0048] i 1,5 is, length

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[0049] i 1,6、v This is fed back by layer v.

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[0050] i 1,7,vThis is a non-zero coefficient instruction for layer v, a bit sequence, and has a total length of .

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[0051] i 1,8,v This is the strongest coefficient indication for layer v, and its value range is,

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[0052] i 2,3,v This is the amplitude coefficient quantization instruction for the two polarizations of layer v, where each amplitude coefficient is a 4-bit bit string, and each codepoint corresponds to one quantization value, where the amplitude coefficient of the polarization with the strongest coefficient is assumed to be 1 and is not fed back.

[0053] i 2,4,v This is the amplitude coefficient quantization instruction for all tap coefficients in layer v, where each amplitude coefficient is a 3-bit bit string, and each codepoint corresponds to one quantization value, totaling

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[0054] i 2,5,v This is the phase coefficient quantization instruction for all tap coefficients of layer v, where each coefficient is a 4-bit bit string, and each codepoint corresponds to one quantization value, totaling

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[0055] The specific mapping order for each coefficient is shown in Table 4.

[0056] [Table 4]

[0057] i 2,4,v i 2,5,v i 1,7,v The bit priority is determined based on the priority value calculated for each bit, with lower priority values ​​indicating higher priority. The calculation formula is as follows:

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[0058] formula

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[0059] formula

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[0060] [Table 5]

[0061] As can be seen from this, the current R16 Type 2 codebook parameter definitions and parameter values ​​are mainly for PMI of a single TRP, and cannot be directly used for joint transmission schemes of multiple TRPs when it is necessary to feed back the spatial domain beam of each TRP, and a certain amount of optimization space is required to reduce the feedback overhead, so feedback reinforcement may be performed to reduce the feedback overhead.

[0062] In the following sections, with the help of diagrams, we will describe in detail the PMI feedback scheme for multi-TRP transmission according to the embodiments of this application, using several embodiments and their application scenarios.

[0063] Figure 2 shows a flowchart of a PMI feedback method for multi-TRP transmission in an embodiment of the present application, and this method 200 may be performed by a terminal. In other words, the method may be performed by software or hardware installed on the terminal. As shown in Figure 2, this method may include the following steps.

[0064] S210, the terminal determines an orthogonal beamgroup set corresponding to each TRP based on target parameters configured by the network side for multiple TRPs for which joint transmission is permitted.

[0065] In embodiments of this application, the network side may configure target parameters for a plurality of TRPs that allow joint transmission, where the target parameters may be instructed to the terminal by upper-layer signaling or configured to the terminal by upper-layer configuration signaling.

[0066] In one possible implementation, S210 may include the following steps 1 to 3.

[0067] Step 1: Obtain the target parameters for each of the aforementioned TRPs.

[0068] In one selective implementation, the target parameter may include the port configuration parameter of each TRP, that is, the target parameter is the port configuration parameter N 1,i and N 2,i It may include and, here, N 1,i and N 2,i This refers to the number of antenna ports configured on the network side in two dimensions with the same polarization for TRP i, where TRP i is the i+1 TRP among the plurality of TRPs.

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[0069] In one selective implementation, the target parameters are the port configuration parameters of each TRP and the number of TRPs.

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[0070] In the above selective implementation method, the network side selectively determines the number of TRPs for which joint transmission is permitted.

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[0071] (1) Number of TRPs configured on the network side

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[0072] (2) The number of TRPs based on the configured target information

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[0073] In one possible implementation, the network side may further configure the predetermined number corresponding to each TRP. That is, the target parameters are: A predetermined number L of target orthogonal beams, which corresponds to the TRP i. i Alternatively, it may further include a predetermined total number L_total of target orthogonal beams, which is the sum of the number of target orthogonal beams corresponding to the plurality of TRPs.

[0074] Step 2, according to the target parameter of TRP i, based on the instructions or preset information for upper layer signaling, the oversampling coefficient O corresponding to TRP i is determined. 1,i and O 2,i The value is obtained, where TRP i is the (i+1)th TRP among the plurality of TRPs,

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[0075] Step 3, the oversampling coefficient O of the obtained TRP i 1,i and O 2,i Based on the value, the orthogonal beamgroup set corresponding to TRP i

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[0076] In one possible implementation, the network side may uniformly configure one set of target parameters for each TRP, or each TRP may configure one set of target parameters. Therefore, obtaining the target parameters for each TRP includes one of the following:

[0077] (1) The network side obtains a set of target parameters uniformly configured for multiple TRPs, and the target parameters of multiple TRPs are the same. For example, the network side may uniformly configure a set of port configuration parameters N1 and N2 for multiple TRPs, and instruct that the port configuration parameters of each TRP are all the same, that is, for each TRP, the terminal obtains an orthogonal beam group set using port configuration parameters N1 and N2. Alternatively, the network side may uniformly configure a predetermined number L for multiple TRPs, and instruct that the predetermined number corresponding to each TRP is the same. 2, L may be configured uniformly, and it may be indicated that the port configuration parameters and corresponding predetermined numbers of each TRP are all the same.

[0078] In the case of a set of target parameters selectively configured uniformly by the network side for all TRPs, since the port configuration parameters N1 and N2 for multiple TRPs are all the same, and therefore the oversampling coefficients O1 and O2 corresponding to each TRP are also the same, in order to save terminal resources, the network side may configure the oversampling coefficients O1 and O2 directly, and therefore in one possible implementation, the target parameters may further include the values ​​of the oversampling coefficients O1 and O2, and the oversampling coefficient O corresponding to TRP i 1,i =O1, O 2,i= O2, meaning that each TRP adopts the values ​​of the oversampling coefficients O1 and O2 from the same group.

[0079] (2) The network side obtains one set of target parameters configured for each of the TRPs, and one set of target parameters corresponding to each of the TRPs, where the target parameters configured for each of the TRPs are not exactly the same. For example, for TRP i among the multiple TRPs, the network side obtains one set of port configuration parameters N for this TRP. 1,i and N 2,i It is also possible to configure a set of port configuration parameters N for TRP j among multiple TRPs (where i is not equal to j). 1,j and N 2,j It is also possible to construct a structure where N 1,i and N 2,i and N 1,j and N 2,j This may be the same or different, and for TRP i, the terminal has port configuration parameter N 1,i and N 2,i Using this method, the orthogonal beam group set is obtained for TRP i, and for TRP j, the terminal has port configuration parameter N. 1,j and N 2,j The orthogonal beam group set of TRP j is obtained using this method. Also, for example, for TRP i among multiple TRPs, the predetermined number configured for this TRP by the network side is L i Therefore, for TRP j among multiple TRPs, the predetermined number configured for this TRP by the network side is L j And L i and L j These may be the same or different.

[0080] (3) For multiple TRPs, the network side may configure a predetermined total number L_total for all TRPs, and the predetermined number associated with TRP i among the multiple TRPs is L iThis is determined by the terminal based on L_total.

[0081] S212, based on the channel information of each TRP, a target orthogonal beam group corresponding to each TRP is selected from the set of orthogonal beam groups corresponding to each TRP, and a predetermined number of target orthogonal beams corresponding to each TRP are selected from the target orthogonal beam group.

[0082] In the embodiments of this application, the terminal may, based on the channel information of each TRP, select a target orthogonal beam group corresponding to each TRP from a set of orthogonal beam groups corresponding to that TRP, and select a predetermined number of target orthogonal beams from the target orthogonal beam group.

[0083] Here, the channel information for each TRP may be obtained by the terminal measuring the channel reference signal of each TRP, and the terminal may select a corresponding target orthogonal beam group and a predetermined number of target orthogonal beams in the target orthogonal beam group based on the measurement results.

[0084] In one possible implementation, S212 may include the following:

[0085] Step 1, Based on the channel information of TRP i, the orthogonal beam group number of TRP i

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[0086] S214, a first feedback parameter is determined for feeding back target orthogonal beam groups corresponding to a plurality of TRPs, and a second feedback parameter is determined for feeding back a predetermined number of target orthogonal beams in each target orthogonal beam group, wherein the first feedback parameter includes a first combination number indicating target orthogonal beam groups corresponding to a plurality of TRPs, and / or the second feedback parameter includes a second combination number indicating a predetermined number of target orthogonal beams in each target orthogonal beam group.

[0087] In the embodiments of this application, the overhead of spatial domain parameter feedback in PMI can be reduced by specifying a target orthogonal beam group corresponding to a plurality of TRPs by a first combination number and / or specifying a predetermined number of target orthogonal beams in each target orthogonal beam group by a second combination number.

[0088] In one possible implementation, the number of the target orthogonal beam group and the number of the target orthogonal beam corresponding to each TRP may be globally numbered before obtaining the first and second feedback parameters. Therefore, before S214, this method may further include the following steps.

[0089] Step 1: Assign a global number to the target orthogonal beam group corresponding to each TRP to obtain target orthogonal beam group information corresponding to multiple TRPs.

[0090] For example, taking one TRP i as an example, the number of the target orthogonal beam group corresponding to each TRP may be globally numbered using one of the following methods.

[0091] (1) The number of the beam orthogonal group of the TRP i mentioned above, q 1,i and q 2,iEach of these is q1=(i*O 1,i )+q 1,i q²=q 2,i And number them, (2) The number q of the beam orthogonal group of the TRP i 1,i and q 2,i Each of these is q2=(i*O 2,i )+q 2,i q1=q 1,i And number them, (3) The number q of the beam orthogonal group of the TRP i 1,i and q 2,i q1 =

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[0092] Step 2, L corresponding to each of the TRPs i The identifier information of each target orthogonal beam is globally numbered to obtain the numbers of the target orthogonal beams corresponding to the multiple TRPs, where the identifier information is the identifier information of the target orthogonal beam in the target orthogonal beam group, and the identifier information is parameter

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[0093] Selectively,

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[0094] For example, taking one TRP i as an example, the target orthogonal beam information corresponding to each TRP may be globally numbered using one of the following methods.

[0095] (1) L of TRP i i The identifier information of one of the target orthogonal beams is numbered, and the number of this target orthogonal beam is:

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[0096] In one possible implementation, determining the first number of combinations that designate target orthogonal beam groups corresponding to multiple TRPs is: The number of the target orthogonal beam group corresponding to each TRP is the first combination number

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[0097] In one possible implementation, the first number of combinations

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[0098] Selectively, if the port configuration parameters of each TRP are the same, then the oversampling coefficient values ​​corresponding to each TRP are also the same, and if O1 and O2 are the numbers of the target orthogonal beam groups corresponding to each TRP are the first combination number

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[0099] In one possible implementation, determining the second number of combinations that indicate the predetermined number of target orthogonal beams in each target orthogonal beam group is: A predetermined number of target orthogonal beam numbers corresponding to each TRP are assigned to the second combination number

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[0100] Selectively,

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[0101] Selectively,

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[0102] In one possible implementation, if the port configuration parameters of each TRP are the same, then the oversampling coefficient values ​​corresponding to each TRP are also the same, O1 and O2, and a predetermined number of values ​​corresponding to each TRP.

number

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number

[0103] Here,

Number

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Number

[0104] On the other hand, i 1,2 and

Number

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[0105] S216, The terminal transmits a PMI parameter including the first feedback parameter and the second feedback parameter.

[0106] In the embodiments of this application, the terminal may transmit the PMI parameters by a multi-TRP channel state information (CSI) report, and the network side may obtain the PMI fed back by the terminal based on the received PMI parameters.

[0107] In one possible implementation, prior to S216, this method may further include the following:

[0108] Step 1: Obtain the network-side configuration parameters and the number of delay information points corresponding to each TRP. In this step, the number of delay information points corresponding to each TRP is obtained based on the network-side configuration parameters.

[0109] Step 2, based on the number of delay information corresponding to each TRP, delay information for the plurality of TRPs is obtained, where the PMI parameter further includes delay information for the plurality of TRPs. In this step, the terminal may determine the number of delay information to be obtained based on the number of delay information corresponding to each TRP, and obtain the corresponding number of delay information.

[0110] In one possible implementation, if the number of delay information points corresponding to each TRP is different, the delay information for the multiple TRPs may be obtained based on the largest number of delay information points among the multiple TRPs.

[0111] For example, a terminal may obtain network configuration parameters and calculate the terminal feedback delay information count, where the count may be the same or different for each TRP, and the terminal obtains delay information for multiple TRPs based on the delay information count, where the delay information is represented by a DFT vector or other vector. Selectively, when the delay information count obtained by the terminal is different for each TRP, the terminal obtains delay information for multiple TRPs according to the maximum value.

[0112] In one possible implementation, the terminal may further acquire feedback coefficients for feeding back the coefficient matrix of the PMI, so that the PMI parameters may further include the feedback coefficients.

[0113] The terminal may selectively set the amplitude of the TRP corresponding to the strongest coefficient in the coefficient matrix as a reference value, and obtain the amplitude quantization coefficient between each of the TRPs by quantizing the amplitude of the strongest coefficient of the other TRPs among the plurality of TRPs based on the reference value.

[0114] For example, the terminal assumes that the amplitude of the TRP corresponding to the strongest coefficient is 1, quantizes the amplitude of the strongest coefficients of other TRPs based on the strongest coefficient, and feeds back the corresponding TRP amplitude quantization coefficient. For example, i 2,6,v layer v

number

[0115] In one possible implementation, when a terminal transmits PMI parameters, it may map the PMI parameters to channel state information CSI and transmit them, where the amplitude quantization coefficient between each TRP is mapped to a second part of the CSI, which is located before the polarization amplitude instruction in the PMI parameters or between the polarization amplitude instruction and the window instruction in the PMI parameters.

[0116] For example, the terminal maps the amplitude quantization coefficient between TRPs to Group 2 of CSI Part 2 and feeds it back, and the mapping order is polarization amplitude indicator i 2,3,v Before, or polarization amplitude indicator i 2,3,vand window indication i 1,5 is located between them.

[0117] According to the above technical solution according to the embodiments of the present application, for the joint transmission schemes of multiple TRPs, when it is necessary to feedback the spatial region beams of each TRP, global number feedback may be performed using the combination number, thereby reducing the feedback overhead. In addition, by feeding back the amplitude between TRPs, the quantization accuracy can be further improved, contributing to the improvement of the precoding performance.

[0118] FIG. 3 shows a flowchart of a method for obtaining PMI for multi-TRP transmission according to an embodiment of the present application. This method 300 may be executed by a network-side device. In other words, the method may be executed by software or hardware installed in the network-side device. As shown in FIG. 3, this method mainly includes the following steps.

[0119] S310. The network-side device instructs the terminal about the target parameters of multiple TPRs for which joint transmission is allowed.

[0120] Here, this target parameter is the same as the target parameter in method 200. Specifically, refer to the description in method 200.

[0121] Optionally, the target parameter is (1) The port configuration parameter N, which is the number of antenna ports respectively configured on two dimensions of the same polarization for TRP i by the network side 1,i and N 2,i , or (2) The port configuration parameter N 1,i and N 2,i , and the number of the multiple TRPs

Number

number

[0122] In one possible implementation, the target parameter is a predetermined number L of the target orthogonal beam. i It may further include, where L i This is a predetermined number of target orthogonal beams corresponding to the TRP i.

[0123] In one possible implementation, the target parameter may further include a predetermined total number L_total of target orthogonal beams, where L_total is the sum of the number of target orthogonal beams corresponding to the plurality of TRPs.

[0124] In one possible implementation, the network-side device sends the terminal the number of the multiple TRPs.

number

number

number

[0125] In one possible implementation, the network-side equipment instructs the terminal to specify the target parameters of multiple TPRs for which joint transmission is permitted. The network-side device uniformly configures a set of target parameters for multiple TRPs and indicates that the target parameters of the multiple TRPs are the same, or The network-side devices each configure one set of target parameters for each of the TRPs and instruct each of the TRPs to configure one set of target parameters corresponding to each of the TRPs, wherein the target parameters configured for each of the TRPs are not exactly the same.

[0126] S312, the terminal receives a PMI parameter, which includes a first feedback parameter and a second feedback parameter, wherein the first feedback parameter includes a first combination number indicating a plurality of target orthogonal beam groups corresponding to the TRPs, and / or the second feedback parameter includes a second combination number indicating a predetermined number of target orthogonal beams in each of the target orthogonal beam groups.

[0127] Here, the terminal can transmit the PMI parameters using the method described in method 200 above, and specifically, refer to the description in method 200; no further explanation is provided here.

[0128] S314, The network-side device acquires the PMI of each TRP based on the PMI parameters.

[0129] For example, the network obtains the corresponding orthogonal beam group number based on a first feedback parameter that is fed back; if the first feedback parameter is a combination number, it demaps based on a mapping formula from number to combination number to obtain the corresponding orthogonal beam group number; then demaps based on a second feedback parameter that is fed back to obtain the orthogonal beam number; based on the orthogonal beam group number and orthogonal beam number, it obtains the spatial domain (SD) matrix of the PMI using a predefined formula; and based on the frequency domain (FD) matrix information and coefficient matrix information fed back by the UE, it needs to obtain the PMI of multiple TRPs specified by the user by multiplication or by a predefined formula.

[0130] According to the technical invention of the embodiment of this application, in a multi-TRP joint transmission scenario, network-side equipment can improve system performance by acquiring the PMI of each TRP based on the PMI parameters fed back by the terminal.

[0131] Figure 4 shows another flowchart of a PMI feedback method for multi-TRP transmission according to an embodiment of the present application, and as shown in Figure 4, this method 400 mainly comprises the following steps.

[0132] S410, retrieve PMI parameters.

[0133] S412, PMI parameters are fed back.

[0134] Selectively obtaining PMI parameters may include obtaining spatial domain (SD) parameters.

[0135] Selectively obtaining spatial domain parameters may include the following:

[0136] Step 1: Obtain orthogonal beam group information.

[0137] Step 2: Obtain beam information based on orthogonal beam group information.

[0138] Here, acquiring orthogonal beam group information and orthogonal beam information includes the following methods.

[0139] (1) Obtain orthogonal beam group information for each TRP that allows JT transmission. Here, a TRP that allows JT transmission may be one of the TRPs that perform JT transmission CSI feedback selected by the terminal, or one of the TRPs that perform JT transmission CSI feedback instructed by the network side through upper layer signaling.

[0140] Selectively, orthogonal beam group information for each TRP where JT transmission is permitted may be acquired using the following method.

[0141] For any one TRP, first obtain the port configuration parameters N1 and N2 of this TRP based on upper-layer signaling, where N1 and N2 may represent the number of antenna ports on the same polarization in two dimensions of the TRP (e.g., horizontal and vertical dimensions), and determine the two-dimensional beam oversampling coefficients O1 and O2 based on the number of ports in the two dimensions, and then use the channel of this TRP to determine the orthogonal beam group number

number

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[0142] In summary, orthogonal beam group information may be acquired, and the orthogonal beam group information is

number

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number

[0143] (2) Obtain orthogonal beam information for each TRP where JT transmission is permitted.

[0144] Selectively, orthogonal beam information for each TRP that allows JT transmission may be acquired using the following method.

[0145] For any one of the TRPs,

number

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[0146] In summary, orthogonal beam information may be acquired, and said orthogonal beam information is

number

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[0147] (3) The orthogonal beam group information of each TRP that is permitted to transmit JT is acquired in coordination.

[0148] Selectively, the orthogonal beam group information of each TRP that allows JT transmission may be acquired in conjunction using the following method.

[0149] First, based on upper-layer signaling, the number of ports and TRP configuration parameters N 1, N 2, N trp Obtain the following, and for any one TRP, where N1 and N2 may represent the number of antenna ports on two dimensions (e.g., horizontal and vertical dimensions) of the TRP on the same polarization, and the number of ports in the two dimensions and N trp Based on this, two-dimensional beam oversampling coefficients O1 and O2 are determined, and multiple orthogonal beam group sets are assembled based on the port configuration and oversampling coefficients of all TRPs.

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[0150] For example, beam orthogonal group number q of TRP i 1_i and q 2_i q1=(i*O1)+q 1_i q²=q 2_i You may number them as follows, or the beam orthogonal group number q of TRP i. 1_i and q 2_i q2=(i*O2)+q 2_i q1=q 1_i You can also number them like this.

[0151] The last orthogonal beam group information obtained is:

number

[0152] (4) The orthogonal beam information of each TRP that is permitted to transmit via JT is acquired in a coordinated manner.

[0153] Selectively, the orthogonal beam information of each TRP that allows JT transmission may be acquired in conjunction using the following method.

[0154] For all TRPs, one orthogonal beam group G is formed based on q1 and q2 of TRP i. i We decided on this, and here,

number

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[0155] For example, one beam indication information out of the L orthogonal beam indication information associated with TRP i is m=(i*N2)+m i l=l i The beam indication information of one of the L orthogonal beam indication information associated with TRP i is numbered as m=m i l=(i*N1)+l i They are numbered like this.

[0156] To summarize, the orthogonal beam information obtained at the end is:

number

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number

[0157] In one possible implementation, when acquiring beam information based on orthogonal beam groups according to network instructions, the network may indicate that the number of beams for each TRP is not exactly the same, i.e., the L values ​​corresponding to each TRP are not exactly the same, or the network may indicate that the number of beams for each TRP is the same, i.e., the L values ​​corresponding to each TRP are the same.

[0158] In one possible implementation, feeding back PMI parameters may include feeding back SD (spatial domain) parameters.

[0159] Selectively providing feedback on SD parameters may include the following:

[0160] Step 1: Feedback the orthogonal beam group information. Step 2: Provide feedback on orthogonal beam information.

[0161] Selectively feeding back orthogonal beam group information may include feeding back the orthogonal beam group information for each TRP.

[0162] For example, parameters

number

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[0163] Alternatively, the combination count can be used to feed back the orthogonal beam group information of all TRPs. For example, the orthogonal beam group information of all TRPs can be mapped to the combination count.

[0164] For example, parameters

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[0165] The network is the number of combinations

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[0166] Selectively feeding back orthogonal beam information may include feeding back the orthogonal beam information of each TRP using the number of combinations.

[0167] For example, parameters

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[0168] The network side has a number of combinations.

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[0169] Alternatively, the combination count can be used to feed back the orthogonal beam information of all TRPs. For example, the orthogonal beam information of all TRPs can be mapped to the combination count.

[0170] For example, parameters

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[0171] The network side has a number of combinations.

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[0172] In one possible implementation, obtaining PMI parameters may also mean obtaining frequency domain or delay domain parameters.

[0173] Selectively obtaining the frequency domain or the delay domain may include the following:

[0174] Step 1: Obtain network configuration parameters and calculate the number of terminal feedback delays. Selectively, the numbers may be the same for each TRP, or they may not be exactly the same for each TRP.

[0175] Step 2, the terminal acquires delay information for multiple TRPs based on the delay information count, and the delay information is represented by a DFT vector or other vector.

[0176] If the number of delay information points acquired by the terminal differs for each TRP, the terminal acquires delay information for multiple TRPs according to the maximum value.

[0177] In one possible implementation, feeding back the PMI parameters may further include feeding back the coefficient matrices corresponding to the delay domain and the spatial domain.

[0178] Selectively feeding back coefficient matrices corresponding to the delay domain and the spatial domain may include the following:

[0179] Step 1: The terminal assumes that the amplitude of the TRP corresponding to the strongest coefficient is 1, quantizes the amplitude of the strongest coefficients of other TRPs based on the strongest coefficient, and feeds back the corresponding TRP amplitude quantization coefficient.

[0180] For example, i 2,6,v to layer v

number

[0181] Step 2, the terminal maps the amplitude quantization coefficients between TRPs to Group 2 of CSI Part 2 and feeds them back, and the mapping order is polarization amplitude indicator i 2,3,v Before, or polarization amplitude indicator i 2,3,v and window instruction i 1,5 It is located between the two.

[0182] According to the above method, for joint transmission schemes of multiple TRPs, when it is necessary to feed back the spatial domain beam of each TRP, the feedback overhead can be reduced by performing global number feedback using the number of combinations. Furthermore, by feeding back the amplitude between TRPs, the quantization accuracy can be further improved, contributing to improved precoding performance.

[0183] In the PMI feedback method for multi-TRP transmission according to the embodiment of this application, the execution body may be a PMI feedback device for multi-TRP transmission. In the embodiment of this application, the PMI feedback device for multi-TRP transmission according to the embodiment of this application will be described by taking as an example that the PMI feedback device for multi-TRP transmission performs the PMI feedback method for multi-TRP transmission.

[0184] Figure 5 shows a schematic diagram of the structure of a PMI feedback device for multi-TRP transmission according to an embodiment of the present application. As shown in Figure 5, the device 500 mainly includes a first decision module 501, a selection module 502, a second decision module 503, and a first transmission module 504.

[0185] In embodiments of this application, a first determination module 501 is used to determine a set of orthogonal beam groups corresponding to each TRP based on target parameters configured by the network side for a plurality of TRPs for which joint transmission is permitted; a selection module 502 is used to select a target orthogonal beam group corresponding to each TRP from the set of orthogonal beam groups corresponding to each TRP, and to select a predetermined number of target orthogonal beams corresponding to each TRP from the target orthogonal beam groups, based on channel information for each TRP; a second determination module 503 is used to determine a first feedback parameter for feeding back the target orthogonal beam groups corresponding to the plurality of TRPs and a second feedback parameter for feeding back the predetermined number of target orthogonal beams in each of the target orthogonal beam groups, wherein the first feedback parameter includes a first combination number indicating the target orthogonal beam groups corresponding to the plurality of TRPs, and / or the second feedback parameter includes a second combination number indicating the predetermined number of target orthogonal beams in each of the target orthogonal beam groups; and a first transmission module 504 is used to transmit a PMI parameter including the first feedback parameter and the second feedback parameter.

[0186] In one possible implementation, the first decision module 501 determines the set of orthogonal beam groups corresponding to each TRP based on target parameters configured for multiple TRPs by the network side. To obtain the target parameters for each of the aforementioned TRPs, According to the target parameters of TRP i, based on the instructions or preset information for upper layer signaling, the oversampling coefficient O corresponding to TRP i is determined. 1,i and O 2,i The value of is obtained, wherein TRP i is the (i+1)th TRP among the plurality of TRPs,

number

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[0187] In one possible implementation, the target parameter is: The port configuration parameter N is the number of antenna ports configured on two dimensions with the same polarization for the TRP i, as determined by the network side. 1,i and N 2,i , or, The aforementioned port configuration parameter N 1,i and N 2,i , and the number of the plurality of TRPs

number

[0188] In one possible implementation, the target parameter is: A predetermined number L of target orthogonal beams, which corresponds to the TRP i. i or further includes a predetermined total number L_total of target orthogonal beams, which is the sum of the number of target orthogonal beams corresponding to the plurality of TRPs.

[0189] In one possible implementation, the first decision module 501 determines the number of the plurality of TRPs.

number

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[0190] In one possible implementation, the first decision module 501 acquires the target parameter of each TRP, The network side obtains a set of target parameters uniformly configured for multiple TRPs, and indicates that the target parameters of the multiple TRPs are the same, or The network side obtains a set of target parameters configured for each of the TRPs, and instructs each of the TRPs to use a set of target parameters corresponding to each of the TRPs, wherein the target parameters configured for each of the TRPs by the network side are not exactly the same.

[0191] In one possible implementation, for a set of target parameters uniformly configured by the network for each TRP, the target parameters further include the values ​​of oversampling coefficients O1 and O2, and the oversampling coefficient O corresponding to the TRP i. 1,i =O1, O2,i = O2

[0192] In one possible implementation, the selection module 502 selects a target orthogonal beam group corresponding to each TRP from the set of orthogonal beam groups corresponding to each TRP, and selects a predetermined number of target orthogonal beams corresponding to each TRP from the target orthogonal beam groups, based on the channel information of each TRP. Based on the channel information of TRP i, the orthogonal beam group number of TRP i

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[0193] In one possible implementation, the second decision module further, A global numbering system is assigned to the target orthogonal beam group corresponding to each of the TRPs, thereby obtaining target orthogonal beam group information corresponding to multiple TRPs. L corresponding to each of the aforementioned TRPs i This is used to obtain the numbers of target orthogonal beams corresponding to multiple TRPs by globally numbering the identifier information of each target orthogonal beam, where the identifier information is the identifier information of the target orthogonal beam in the target orthogonal beam group, and the identifier information is parameter

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[0194] One possible implementation is to globally number the target orthogonal beam groups corresponding to each TRP. The number q of the beam orthogonal group of the aforementioned TRP i 1,i and q 2,i Each of these is q1=(i*O 1,i )+q 1,i q²=q 2,i And numbering them, The number q of the beam orthogonal group of the aforementioned TRP i 1,i and q 2,i Each of these is q2=(i*O 2,i )+q 2,i q1=q 1,i And numbering them, The number q of the beam orthogonal group of the aforementioned TRP i 1,i and q 2,i q1 =

number

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[0195] In one possible implementation, global numbering of identifier information for Li target orthogonal beams corresponding to each TRP is performed by The L of TRP i i The identifier information of one of the target orthogonal beams is numbered, and the number of this target orthogonal beam is:

number

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[0196] In one possible implementation, the second decision module 503 determines the first number of combinations that indicate target orthogonal beam groups corresponding to a plurality of TRPs. The number of the target orthogonal beam group corresponding to each TRP is the first combination number

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[0197] In one possible implementation, the first number of combinations

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[0198] In one possible implementation, the second decision module 503 determines the second number of combinations that indicate the predetermined number of target orthogonal beams in each of the target orthogonal beam groups. A predetermined number of target orthogonal beam numbers corresponding to each TRP are assigned to the second combination number

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[0199] In one possible implementation,

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[0200] In one possible implementation,

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[0201] In one possible implementation, the second decision module 503 further, The network-side configuration parameters are obtained, and the number of delay information corresponding to each TRP is obtained. Based on the number of delay information items corresponding to each TRP, the PMI parameter is used to obtain delay information for the plurality of TRPs, where the PMI parameter further includes delay information for the plurality of TRPs.

[0202] In one possible implementation, the number of delay information points differs for different TRPs.

[0203] In one possible implementation, obtaining delay information for the multiple TRPs based on the number of delay information includes obtaining delay information for the multiple TRPs based on the largest number of delay information in the multiple TRPs.

[0204] In one possible implementation, the second decision module 503 further, This is used to obtain feedback coefficients for feeding back the coefficient matrix of the PMI, where the PMI parameters further include the feedback coefficients.

[0205] In one possible implementation, the second decision module 503 obtains feedback coefficients that feed back the coefficient matrix of the PMI, This includes setting the amplitude of the TRP corresponding to the strongest coefficient in the coefficient matrix as a reference value, and obtaining the amplitude quantization coefficient between each of the TRPs by quantizing the amplitude of the strongest coefficient of the other TRPs among the plurality of TRPs based on the reference value.

[0206] In one possible implementation, the transmission of the PMI parameters by the first transmitting module 504 includes mapping the PMI parameters to a CSI and transmitting them, where the amplitude quantization coefficient between each of the TRPs is mapped to a second part of the CSI, which is located before the polarization amplitude instruction in the PMI parameters or between the polarization amplitude instruction and the window instruction in the PMI parameters.

[0207] The PMI feedback device for multi-TRP transmission in the embodiments of this application may be an electronic device, such as an electronic device having an operating system, or a component in an electronic device, such as an integrated circuit or a chip. This electronic device may be a terminal or other device. Exemplarily, a terminal may include, but is not limited to, the types of terminals 11 listed above, and other devices may be servers, network-attached storage (NAS), etc., and the embodiments of this application are not specifically limited.

[0208] The PMI feedback device for multi-TRP transmission according to the embodiment of this application can implement each process realized by the terminals of the embodiment of the method shown in Figures 2 to 4, and can achieve the same technical effects, and to avoid repetition of the explanation, it will not be explained further here.

[0209] Figure 6 shows a schematic diagram of the structure of a PMI acquisition device for multi-TRP transmission according to an embodiment of the present application. As shown in Figure 6, the device 600 mainly includes a second transmitting module 601, a receiving module 602, and an acquisition module 603.

[0210] In embodiments of the present application, a second transmitting module 601 is used to instruct a terminal of target parameters for a plurality of TRPs that are permitted to be jointly transmitted; a receiving module 602 is used to receive PMI parameters transmitted by the terminal, which include a first feedback parameter and a second feedback parameter, wherein the first feedback parameter includes a first combination number indicating target orthogonal beam groups corresponding to the plurality of TRPs, and / or the second feedback parameter includes a second combination number indicating a predetermined number of target orthogonal beams in each of the target orthogonal beam groups; and an acquisition module 603 is used to acquire the PMI of each TRP based on the PMI parameters.

[0211] In one possible implementation, the target parameter is: The port configuration parameter N is the number of antenna ports configured on two dimensions with the same polarization for TRP i, as determined by the network side. 1,i and N 2,i , or, The aforementioned port configuration parameter N 1,i and N 2,i , and the number of TRPs N_Ntrp, Here, TRP i is the (i+1)th TRP among the plurality of TRPs, and i ∈ {0, 1, ..., N_Ntrp-1}.

[0212] In one possible implementation, the target parameter is: A predetermined number L of target orthogonal beams, which corresponds to the TRP i. i or further includes a predetermined total number L_total of target orthogonal beams, which is the sum of the number of target orthogonal beams corresponding to the plurality of TRPs.

[0213] In one possible implementation, the terminal has a number of the aforementioned TRPs

number

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number

[0214] In one possible implementation, instructing the terminal of target parameters for multiple TPRs that allow joint transmission is possible. To uniformly configure a set of target parameters for multiple TRPs, to indicate that the target parameters of multiple TRPs are the same, or This involves configuring one set of target parameters for each of the TRPs and instructing each of the TRPs to use one set of target parameters corresponding to each TRP, wherein the target parameters configured for each TRP are not exactly the same.

[0215] The PMI acquisition apparatus for multi-TRP transmission according to the embodiment of this application can implement each process implemented by the network side or network-side equipment in the embodiment of the method shown in Figures 2 to 4, and can achieve the same technical effects, and to avoid repetition of explanation, it will not be explained further here.

[0216] Selectively, as shown in Figure 7, embodiments of this application further provide a communication device 700, which includes a processor 701 and a memory 702, the memory 702 storing a program or instruction that can be executed on the processor 701, for example, if the communication device 700 is a terminal, when this program or instruction is executed by the processor 701, each step of the embodiment of the PMI feedback method for multi-TRP transmission can be realized and the same technical effect can be achieved. If the communication device 700 is a network-side device, when this program or instruction is executed by the processor 701, each step of the embodiment of the PMI acquisition method for multi-TRP transmission can be realized and the same technical effect can be achieved, and to avoid repetition of the explanation, this will not be explained further here.

[0217] Embodiments of this application further provide a terminal comprising a processor and a communication interface, the processor being used to implement each step of the embodiment of the PMI feedback method for multi-TRP transmission, and the communication interface being used to communicate with external devices. Embodiments of this terminal correspond to embodiments of the terminal-side method described above, and each implementation process and implementation method of the embodiment of the method described above can be applied to embodiments of this terminal and achieve the same technical effects. Specifically, Figure 8 is a schematic diagram of the hardware structure realizing the terminal embodiment of this application.

[0218] The terminal 800 includes, but is not limited to, some of the following components: a radio frequency unit 801, a network module 802, an audio output unit 803, an input unit 804, a sensor 805, a display unit 806, a user input unit 807, an interface unit 808, a memory 809, and a processor 810.

[0219] As those skilled in the art will understand, the terminal 800 may further include a power supply (e.g., a battery) to power each component, and the power supply may be logically connected to the processor 810 by a power management system, thereby enabling functions such as charge / discharge management and power consumption management by the power management system. The terminal structure shown in Figure 8 does not constitute a limitation on the terminal, and the terminal may include more or fewer components than those shown, or combinations of some components, or different arrangements of components, which will not be described further here.

[0220] It should be understood that, in the embodiments of this application, the input unit 804 may include a graphics processing unit (GPU) 8041 and a microphone 8042, the GPU 8041 processing still images or video image data obtained by an image capture device (e.g., a camera) in video capture mode or image capture mode. The display unit 806 may include a display panel 8061, which may be configured in the form of a liquid crystal display, organic light-emitting diodes, etc. The user input unit 807 includes at least one of a touch panel 8071 and other input devices 8072. The touch panel 8071 is also called a touchscreen. The touch panel 8071 may include two parts: a touch detection device and a touch controller. The other input devices 8072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control buttons, switch buttons, etc.), a trackball, a mouse, or an operating lever, and will not be described further here.

[0221] In the embodiments of this application, the radio frequency unit 801 can receive downlink data from network-side equipment and transmit it to the processor 810 for processing, and the radio frequency unit 801 can also transmit uplink data to network-side equipment. Generally, the radio frequency unit 801 includes, but is not limited to, an antenna, amplifier, transceiver, coupler, low-noise amplifier, duplexer, etc.

[0222] Memory 809 may be used to store software programs or instructions and various data. Memory 809 may include a first storage area mainly for storing programs or instructions and a second storage area for storing data, wherein the first storage area can store an operating system, an application program or instructions necessary for at least one function (e.g., audio playback function, image playback function, etc.). Memory 809 may include volatile memory or non-volatile memory, or it may include both volatile and non-volatile memory. Non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electrically erasable programmable read-only memory (Electrically EPROM, EEPROM), or flash memory. The volatile memory may be Random Access Memory (RAM), Static Random Access Memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic Random Access Memory (Double Data Rate SDRAM, DDRSDRAM), Enhanced Synchronous Dynamic Random Access Memory (Enhanced SDRAM, ESDRAM), Synch-link Dynamic Random Access Memory (Synch-link DRAM, SLDRAM), and Direct Rambus Random Access Memory (DRRAM). The memory 809 in the embodiments of this application includes, but is not limited to, these and any other suitable types of memory.

[0223] The processor 810 may include one or more processing units. Optionally, the processor 810 integrates an application processor and a modem processor, where the application processor primarily handles operations related to the operating system, user interface, and application programs, and the modem processor primarily handles wireless communication signals, such as a baseband processor. To be clear, the modem processor does not necessarily have to be integrated into the processor 810.

[0224] Here, the processor 810 is, Based on target parameters configured by the network for multiple TRPs that allow joint transmission, the set of orthogonal beam groups corresponding to each TRP is determined. Based on the channel information of each TRP, a target orthogonal beam group corresponding to each TRP is selected from the set of orthogonal beam groups corresponding to each TRP, and a predetermined number of target orthogonal beams corresponding to each TRP are selected from the target orthogonal beam group. A first feedback parameter is used to determine a target orthogonal beam group that provides feedback for a plurality of TRPs, and a second feedback parameter is used to provide feedback for a predetermined number of target orthogonal beams in each of the target orthogonal beam groups, wherein the first feedback parameter includes a first combination number indicating the target orthogonal beam groups that correspond to the plurality of TRPs, and / or the second feedback parameter includes a second combination number indicating the predetermined number of target orthogonal beams in each of the target orthogonal beam groups. The radio frequency unit 801 is used to transmit PMI parameters, including the first feedback parameter and the second feedback parameter.

[0225] Embodiments of this application further provide network-side equipment comprising a processor and a communication interface, wherein the processor is used to implement each step of the embodiment of the method for acquiring PMI for multi-TRP transmission described above, and the communication interface is used to communicate with external equipment. Embodiments of this network-side equipment correspond to embodiments of the network-side equipment method described above, and each implementation process and implementation method of the embodiment of the method described above can be applied to embodiments of this network-side equipment and achieve the same technical effects.

[0226] Specifically, the embodiments of this application further provide network-side equipment. As shown in Figure 9, this network-side equipment 900 includes an antenna 901, a radio frequency device 902, a baseband device 903, a processor 904, and a memory 905. The antenna 901 and the radio frequency device 902 are connected. In the uplink direction, the radio frequency device 902 receives information via the antenna 901 and transmits the received information to the baseband device 903 for processing. In the downlink direction, the baseband device 903 processes the information to be transmitted and transmits it to the radio frequency device 902, which processes the received information and then transmits it via the antenna 901.

[0227] In the above embodiments, the method performed by the network-side equipment may also be implemented in the baseband device 903, which includes a baseband processor.

[0228] The baseband device 903 may include, for example, at least one baseband board on which multiple chips are installed, and as shown in Figure 9, one of the chips is, for example, a baseband processor, which is connected to memory 905 via a bus interface, calls a program in memory 905, and performs the network equipment operations shown in the embodiment of the above method.

[0229] This network-side device may further include a network interface 906, which is, for example, a common public radio interface (CPRI).

[0230] Specifically, the network-side device 900 of the embodiment of this application further includes instructions or programs stored in memory 905 and operable on processor 904, the processor 904 calling instructions or programs in memory 905 and performing the same actions as the modules shown in Figure 6, and achieving the same technical effects, which are not described further here in order to avoid repetition of the description.

[0231] Embodiments of this application further provide a readable storage medium in which a program or instruction is stored, and when this program or instruction is executed by a processor, each process of the embodiment of the PMI feedback method for multi-TRP transmission or each process of the PMI acquisition method for multi-TRP transmission can be realized, and the same technical effects can be achieved, and to avoid repetition of the description, no further explanation is provided here.

[0232] Here, the processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory ROM, random access memory RAM, magnetic disk, or optical disk.

[0233] Embodiments of this application further provide a chip comprising a processor and a communication interface, the communication interface being coupled with the processor, the processor being used to run programs or instructions, implement each process of the embodiment of the PMI feedback method for multi-TRP transmission, or implement each process of the embodiment of the PMI acquisition method for multi-TRP transmission, and achieving the same technical effects, which are not described further here to avoid repetition.

[0234] It should be understood that the chips referred to in the embodiments of this application may also be called system-level chips, system chips, chip systems, or system-on-a-chip, etc.

[0235] Embodiments of this application further provide a computer program / program product stored in a storage medium, which is executed by at least one processor to implement each process of the embodiment of the PMI feedback method for multi-TRP transmission, or each process of the embodiment of the PMI acquisition method for multi-TRP transmission, and achieve the same technical effects, which will not be described further here to avoid repetition.

[0236] Embodiments of the present application further provide a PMI feedback system for multi-TRP transmission, the system comprising a terminal and network-side equipment, the terminal being used to perform the steps of the PMI feedback method for multi-TRP transmission described above, and the network-side equipment being used to perform the steps of the PMI acquisition method for multi-TRP transmission described above.

[0237] It should be noted that, in this specification, the terms “include,” “incorporate,” or any other variation thereof are intended to cover the non-exclusive “include,” thereby including not only those elements but also other elements not explicitly listed, or elements specific to such process, method, article, or apparatus. Unless otherwise specified, an element limited by the phrase “includes one of…” is not excluded from the existence of other identical elements in a process, method, article, or apparatus containing that element. It should also be noted that the scope of methods and apparatus in embodiments of this application is not limited to performing functions in the order illustrated or discussed, but may include performing functions in a manner that is essentially simultaneous or in reverse order based on the functions involved, and methods described in a different procedure than those described, for example, may be performed, and various steps may be added, omitted, or combined. Furthermore, features described by reference to some examples may be combined with other examples.

[0238] As will be readily apparent to those skilled in the art from the above description of the embodiments, the methods of the above embodiments can be implemented in the form of software and a necessary general-purpose hardware platform. Of course, they may also be implemented in hardware, but in many cases the former is a more preferred embodiment. With this understanding in mind, the parts of the invention that substantially contribute to or to the prior art may be embodied in the form of a computer software product, which is stored on a single storage medium (e.g., ROM / RAM, magnetic disk, optical disk) and contains some instructions for causing a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to perform the methods of each embodiment of this invention.

[0239] The above describes embodiments of this application, accompanied by drawings; however, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can, by the suggestion of this application, make many forms, as long as they do not deviate from the spirit and claims of this application, and all of these fall within the scope of protection of this application.

Claims

1. A feedback method for the precoding matrix instruction PMI of multi-transmit / receive point TRP transmission, The terminal determines a set of orthogonal beam groups corresponding to each TRP based on target parameters configured by the network side for multiple TRPs on which joint transmission is permitted, wherein the target parameters are a predetermined number of target orthogonal beams L corresponding to TRP i. ｉ Includes, [Math 1] And, [Math 2] This is the number of the aforementioned TRPs, Based on the channel information of each TRP, a target orthogonal beam group corresponding to the TRP is selected from the set of orthogonal beam groups corresponding to each TRP, and a predetermined number of target orthogonal beams corresponding to each TRP are selected from the target orthogonal beam group. Determining a first feedback parameter for feeding back target orthogonal beam groups corresponding to a plurality of TRPs, and a second feedback parameter for feeding back a predetermined number of target orthogonal beams in each target orthogonal beam group, wherein the second feedback parameter includes a second number of combinations indicating the predetermined number of target orthogonal beams in each target orthogonal beam group. A method comprising the terminal transmitting a PMI parameter including the first feedback parameter and the second feedback parameter.

2. The terminal determines the set of orthogonal beamgroups corresponding to each TRP based on target parameters configured by the network side for multiple TRPs where joint transmission is permitted. To obtain the target parameters for each of the aforementioned TRPs, According to the target parameters of TRP i, and based on the instructions or preset information for upper layer signaling, the oversampling coefficient O corresponding to TRP i is determined. １，ｉ and O ２，ｉ The value of is obtained, where TRP i is the (i+1)th TRP among the plurality of TRPs, [Math 3] And, [Math 4] This is the number of the aforementioned TRPs, The oversampling coefficient O of the obtained TRP i １，ｉ and O ２，ｉ Based on the value of, O corresponding to TRP i １，ｉ *O ２，ｉ A set of orthogonal beam groups, each containing a set of orthogonal beam groups. 【Number 5】 The method according to claim 1, which includes obtaining

3. The aforementioned target parameter is, The port configuration parameter N, which is the number of antenna ports configured on two dimensions of the same polarization for the TRP i by the network side respectively １，ｉ and N ２，ｉ or The aforementioned port configuration parameter N １，ｉ and N ２，ｉ , and the number of the plurality of TRPs [Math 6] The method according to claim 2, further comprising:

4. To obtain the target parameters for each of the aforementioned TRPs, The number of TRPs based on the configured target information [Number 7] The method according to claim 3, comprising obtaining, wherein the target information includes one of channel measurement resource CMR and upper layer configuration signaling.

5. To obtain the target parameters for each of the aforementioned TRPs, The network side obtains a set of target parameters uniformly configured for multiple TRPs, wherein the target parameters of the multiple TRPs are the same, or The method according to claim 3, comprising obtaining a set of target parameters configured for each of the TRPs by the network side, wherein the target parameters for each of the TRP configurations are not exactly the same.

6. In the case of a set of target parameters uniformly configured by the network side for each TRP, the target parameters include an oversampling coefficient O １ and O ２ The value of the TRP i is further included, and the oversampling coefficient O corresponding to the TRP i is also included. １，ｉ = O １ , O ２，ｉ = O ２ The method according to claim 4.

7. Based on the channel information of each TRP, selecting a target orthogonal beam group corresponding to each TRP from the set of orthogonal beam groups corresponding to each TRP, and selecting a predetermined number of target orthogonal beams corresponding to each TRP from the target orthogonal beam group, Based on the channel information of TRP i, the orthogonal beam group number of TRP i [Number 8] and [Number 9] This involves obtaining the TRP i, where the TRP i is the (i+1)th TRP among the plurality of TRPs. [Number 10] And, [Math 11] This is the number of the aforementioned TRPs, [Math 12] and [Number 13] Based on the above, the orthogonal beam group set corresponding to TRP i [Number 14] To determine one of the target orthogonal beam groups in [Number 15] and [Number 16] The target orthogonal beam group includes N １，ｉ *N ２，ｉ It includes several orthogonal beams, Using the channel information of the TRP i, the L corresponding to the TRP i is selected from the target orthogonal beam group. ｉ This involves acquiring individual target orthogonal beams, L ｉ The method according to claim 2, wherein is a predetermined number of target orthogonal beams corresponding to the TRP i.

8. Before determining a first feedback parameter for feeding back target orthogonal beam groups corresponding to a plurality of TRPs, and a second feedback parameter for feeding back a predetermined number of target orthogonal beams in each target orthogonal beam group, the method: The number of the target orthogonal beam group corresponding to each TRP is assigned a global number to obtain the numbering for all target orthogonal beam groups corresponding to multiple TRPs. L corresponding to each of the aforementioned TRPs ｉ The method further includes globally numbering the identifiers of the target orthogonal beams to obtain numbering numbers for the target orthogonal beams corresponding to the TRPs, wherein the identifier is an identifier of the target orthogonal beam in the target orthogonal beam group, and the identifier is a parameter [Number 17] and [Number 18] and [Number 19] and [Number 20] is an integer and [Math 21] and [Number 22] The method according to claim 7.

9. The numbering of the target orthogonal beam group corresponding to each TRP is to assign a global numbering to each TRP. The number q of the beam orthogonal group of the aforementioned TRP i １,ｉ and q ２,ｉ q １ = (i * O １，ｉ ) + q １,ｉ , q ２ = q ２,ｉ And numbering them, The number q of the beam orthogonal group of the aforementioned TRP i １,ｉ and q ２,ｉ q ２ = (i * O ２，ｉ ) + q ２,ｉ , q １ = q １,ｉ And numbering them, The number q of the beam orthogonal group of the aforementioned TRP i １,ｉ and q ２,ｉ q １ = [Number 23] +q １,ｉ , q ２ = q ２,ｉ And numbering them, The number q of the beam orthogonal group of the aforementioned TRP i １,ｉ and q ２,ｉ q ２ = [Number 24] +q ２,ｉ , q １ = q １,ｉ This includes one of the following: numbering, Here, [Number 25] This represents the oversampling coefficient of TRP k among the multiple TRPs, L corresponding to each of the aforementioned TRPs ｉ The identifiers of the aforementioned target orthogonal beams are to be globally numbered. The L of TRP i ｉ Parameters of one of the target orthogonal beams [Number 26] and [Number 27] The numbers for this target orthogonal beam are numbered as follows: [Number 28] To obtain, The L of TRP i ｉ Parameters of one of the target orthogonal beams [Number 29] and [Number 30] The numbers for this target orthogonal beam are numbered as follows: [Number 31] To obtain, The L of TRP i ｉ Parameters of one of the target orthogonal beams [Number 32] and [Number 33] The numbers for this target orthogonal beam are numbered as follows: [Number 34] To obtain, The L of TRP i ｉ Parameters of one of the target orthogonal beams [Number 35] and [Number 36] The numbers for this target orthogonal beam are numbered as follows: [Number 37] To obtain one of these, Here, [Number 38] The method according to claim 8, wherein is a port configuration parameter of TRP k.

10. A method for obtaining PMI in multi-TRP transmission, The network-side equipment instructs the terminal to specify target parameters for multiple TPRs that allow joint transmission, wherein the target parameters are a predetermined number of target orthogonal beams L corresponding to the TRP i. ｉ Includes, [Number 39] And, [Number 40] This is the number of the aforementioned TRPs, Receiving PMI parameters transmitted by the terminal, which include a first feedback parameter and a second feedback parameter, wherein the second feedback parameter includes a second combination number indicating a predetermined number of target orthogonal beams in each target orthogonal beam group. A method comprising the network-side device obtaining the PMI of each TRP based on the PMI parameters.

11. The aforementioned target parameter is, The port configuration parameter N is the number of antenna ports configured on two dimensions with the same polarization for TRP i, as determined by the network side. １，ｉ and N ２，ｉ , or, The aforementioned port configuration parameter N １，ｉ and N ２，ｉ , and the number of the plurality of TRPs [Number 41] It further includes, Here, TRP i is the (i+1)th TRP among the plurality of TRPs, [Number 42] The method according to claim 10.

12. The network-side equipment instructs the terminal to specify the target parameters of multiple TPRs for which joint transmission is permitted. Based on the target information configured for the network-side device, the number of the multiple TRPs [Number 43] The method according to claim 11, comprising instructing, wherein the target information includes one of a channel measurement resource CMR and upper layer configuration signaling.

13. The network-side equipment instructs the terminal to specify the target parameters of multiple TPRs for which joint transmission is permitted. The network-side device uniformly configures a set of target parameters for multiple TRPs and indicates that the target parameters of the multiple TRPs are the same, or The method according to claim 10, wherein each network-side device configures one set of target parameters for each of the TRPs and instructs each of the TRPs to configure one set of target parameters corresponding to each of the TRPs, wherein the target parameters configured for each of the TRPs are not exactly the same.

14. A terminal comprising a processor and memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, a step of the PMI feedback method for multi-TRP transmission described in any one of claims 1 to 9 is realized.

15. Network-side device comprising a processor and memory, wherein the memory stores a program or instruction that can be executed on the processor, and when the program or instruction is executed by the processor, the network-side device realizes the steps of the method for acquiring PMI for multi-TRP transmission according to any one of claims 10 to 13.

16. A readable storage medium wherein a program or instruction is stored in the readable storage medium, and when the program or instruction is executed by a processor, a step of the PMI feedback method for multi-TRP transmission described in any one of claims 1 to 9 is realized.

17. A readable storage medium wherein a program or instruction is stored in the readable storage medium, and when the program or instruction is executed by a processor, the steps of the method for acquiring the PMI of multi-TRP transmission according to any one of claims 10 to 13 are realized.

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