Method, equipment, terminal and network side device for feedback of 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 TO RELATED APPLICATIONS) This application claims priority to a Chinese patent application submitted to the China Patent Office on April 25, 2022, bearing application number 202210442243.5 and titled "Method for feedback of PMI in multi-TRP transmission, terminal and network side equipment", and a Chinese patent application submitted to the China Patent Office on October 9, 2022, bearing application number 202211228519.6 and titled "Method for feedback of PMI in multi-TRP transmission, terminal and network side equipment", all of the contents of which are incorporated herein by reference.

[0002] The present application relates to the field of wireless communication technology, and more particularly to a method for feeding back a precoding matrix indicator (PMI) in a multi-transmission reception point (TRP) transmission, a terminal, and a network side device. [Background technology]

[0003] Coordinated Multiple Points (CoMP) transmission refers to the cooperative participation of multiple geographically separated transmission and reception points (TRPs) in transmitting data for one terminal or cooperatively receiving data transmitted by one terminal, and the multiple transmission points participating in cooperation generally refer to base stations of different cells. Through the cooperation of multiple cell base stations, the interference signal can be used as a useful signal to reduce interference between cells and improve the spectrum utilization rate of the system.

[0004] Common CoMP schemes can be classified into one of the following types: Joint Processing (JP) or Collaborative Scheduling (CS) / Coordinated Beamforming (CB).

[0005] Here, joint processing (JP) refers to the fact that data of one terminal (User Equipment, UE) is available on one or more time-frequency resource points in a CoMP cooperating set, including:

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

[0007] (2) Dynamic Point Selection (DPS) / Frequency Modulation. Data transmission from one point (within the CoMP cooperating set) in one time-frequency resource. The transmission / mixing point can change from one subframe to another, including changes on Radio Bearer (RB) pairs within one subframe. Data is available on multiple points simultaneously. Dynamic Point Selection / Frequency Modulation may also include Dynamic Cell Selection (DCS).

[0008] (3) A combination of DPS and JT. In this case, multiple points can be selected from the time-frequency resource for data transmission. Coordinated Scheduling / Beamforming (CS / CB) means that for one time-frequency resource, the UE's data is only available on one point of the CoMP cooperating 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 cooperating set. The selection of the launch point is semi-static, i.e., Semi-Persistent Point Selection (SSPS), that is, the launch point can only be changed in a semi-static manner every time a point transmits to one specific UE.

[0009] In the related art, in consideration of the overhead problem of precoding matrix indicator (PMI) feedback, the codebook design adds frequency domain compression, and the highest supported rank number is extended to 4, and the distribution situation of non-zero coefficients indicating PMI feedback in a bitmap manner is added. Here, the codebook generation of each layer may be expressed by the following formula:

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[0010] However, since the current codebook parameter definitions and parameter values ​​are mainly made for the PMI of one TRP, the PMI parameter feedback method in the related art does not apply to a scenario in which multiple TRPs transmit cooperatively. Summary of the Invention [Problem to be solved by the invention]

[0011] The embodiments of the present application provide a PMI feedback method, terminal, and network side device for multi-TRP transmission that can solve the problem that the PMI parameter feedback method in the related art is not applicable to a scenario in which multiple TRPs transmit cooperatively. [Means for solving the problem]

[0012] A first aspect provides a method for feedback of PMI for multi-TRP transmission, the method including: a terminal determining an orthogonal beam group set corresponding to each of the TRPs based on target parameters configured by a network side for multiple TRPs for which joint transmission is allowed; selecting a target orthogonal beam group corresponding to the TRP from the orthogonal beam group set corresponding to each of the TRPs based on channel information of each of the TRPs, and selecting a predetermined number of target orthogonal beams corresponding to each of the TRPs from the target orthogonal beam group; determining a first feedback parameter for feeding back target orthogonal beam groups corresponding to the multiple 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 target orthogonal beam groups corresponding to the multiple 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 the terminal transmitting a PMI parameter including the first feedback parameter and the second feedback parameter.

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

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

[0015] A fourth aspect provides a PMI acquisition device for multi-TRP transmission, the device including: a second transmitting module for instructing a terminal of target parameters of multiple TPRs for which joint transmission is allowed; a receiving module for receiving PMI parameters transmitted by the terminal, the PMI parameters including a first feedback parameter and a second feedback parameter, the first feedback parameter including a first combination number indicating target orthogonal beam groups corresponding to multiple TRPs, and / or the second feedback parameter including a second combination number indicating the predetermined number of target orthogonal beams in each of the target orthogonal beam groups; and an acquisition module for acquiring PMI of each of the TRPs based on the PMI parameters.

[0016] A fifth aspect provides a terminal, the terminal including a processor and a memory, the memory storing a program or instructions operable to run on the processor, the program or instructions, when executed by the processor, implementing the steps of the method of the first aspect.

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

[0018] A seventh aspect provides a network side device, the network side device including a processor and a memory, the memory storing a program or instructions operable to run on the processor, the program or instructions, when executed by the processor, realizing the steps of the method of the third aspect.

[0019] An eighth aspect provides a network side device, the network side device including a processor and a communication interface, wherein the processor is adapted to implement steps of the method according to the third aspect, and the communication interface is adapted to communicate with an external device.

[0020] A ninth aspect provides a feedback system for PMI of multi-TRP transmission, the system including a terminal and a network side device, the terminal may be used to perform steps of the method described in the first aspect, and the network side device may be used to perform steps of the method described in the third aspect.

[0021] A tenth aspect provides a readable storage medium having a program or instructions stored thereon, the program or instructions, when executed by a processor, performing steps of the method of the first aspect or performing steps of the method of the third aspect.

[0022] An eleventh aspect provides a chip, the chip including a processor and a communication interface, the communication interface coupled to the processor, the processor running a program or instructions to perform steps of the method of the first aspect or to be used to perform steps of the method of the third aspect.

[0023] A tenth aspect provides a computer program / program product, the computer program / program product being stored on a storage medium, the computer program / program product being executed by at least one processor to perform the steps of the method of the first aspect or to perform the steps of the method of the third aspect. Effect of the Invention

[0024] In an embodiment of the present application, a terminal obtains 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, further selects a target orthogonal beam group corresponding to each TRP based on channel information of each TRP, and 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 PMI parameters including the first feedback parameter and the second feedback parameter, thereby feedbacking PMI parameters in the case of multi-TRP joint transmission and improving the performance of multi-TRP transmission. [Brief description of the drawings]

[0025] [Figure 1] 1 shows a block diagram of a wireless communication system to which an embodiment of the present application can be applied. [Diagram 2] 1 shows a flowchart of a PMI feedback method for multi-TRP transmission according to an embodiment of the present application. [Diagram 3] 1 shows a flowchart of a method for acquiring PMI for multi-TRP transmission according to an embodiment of the present application. [Figure 4]13 shows another flowchart of a PMI feedback method for multi-TRP transmission according to an embodiment of the present application. [Diagram 5] 1 shows a structural schematic diagram of a feedback device for a PMI of multi-TRP transmission according to an embodiment of the present application; [Figure 6] 1 shows a structural schematic diagram of a PMI acquisition device for multi-TRP transmission according to an embodiment of the present application; [Figure 7] 1 shows a structural schematic diagram of a communication device according to an embodiment of the present application; [Figure 8] 1 shows a hardware structure schematic diagram of a terminal according to an embodiment of the present application; [Figure 9] 1 shows a schematic hardware structure diagram of a network side device according to an embodiment of the present application; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] The following clearly describes the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present application are all within the scope of protection of the present application.

[0027] The terms "first," "second," etc. in the specification and claims of the present application are intended to distinguish between similar objects and are not intended to describe a particular order or sequence. It is to be understood that the terms so used are interchangeable where appropriate, such that the embodiments of the present application may be performed in an order other than that shown or described herein, and that the objects distinguished by "first" and "second" are generally of the same type and do not limit the number of objects, e.g., the first object may be one or more. It is to be noted that "and / or" in the specification and claims represents at least one of the objects connected, and the character " / " generally represents an "or" relationship between the related objects.

[0028] It should be noted that the techniques described in the embodiments of the present application are not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but can also be applied 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 the present application are always used interchangeably, and the techniques described may be used in the above-mentioned systems and radio technologies, or in other systems and radio technologies. Although the following description describes a New Radio (NR) system for illustrative purposes, and NR terminology is used in most of the following description, these techniques may also be used in applications other than NR system applications, such as sixth generation (6G) and 7G (8G) systems. th This may be applied to a 6G (6th Generation) communication system.

[0029] 1 shows a block diagram of a wireless communication system to which an embodiment of the present application can be applied. The wireless communication system includes a terminal 11 and a network side device 12. Here, the terminal 11 may be a mobile phone, a tablet personal computer, a laptop computer (also called a notebook computer), a personal digital assistant (PDA), a palmtop computer, a netbook, an ultra-mobile personal computer (UMPC), a mobile internet device (MID), an augmented reality (AR) / virtual reality (VR) device, a robot, a wearable device, a vehicle user equipment (VUE), a pedestrian user equipment (PUE), a smart home (home equipment having a wireless communication function, such as a refrigerator, a television, a washing machine, or furniture), a game machine, a personal computer, a mobile phone, a mobile terminal (Mobile Internet Device), a mobile user equipment (MID), a mobile terminal (Mobile User Equipment ... The terminal side equipment 12 may be a terminal side equipment such as a mobile phone, a personal computer (PC), a deposit payment machine or a self-service machine, and the wearable device includes a smart watch, a smart wristband, a smart earphone, a smart glasses, a smart accessory (smart bracelet, a smart hand chain, a smart finger ring, a smart necklace, a smart ankle bracelet, a smart anklet, etc.), a smart band, a smart clothing, etc. It should be noted that the terminal 11 in the embodiment of the present application is not limited to a specific type. The network side equipment 12 may include an access network equipment and / or a core network equipment, where the access network equipment may be referred to as a radio access network equipment, a radio access network (Radio Access Network, RAN), a radio access network function, or a radio access network unit.The access network equipment may include a base station, a Wireless Local Area Network (WLAN) access point, or a WiFi node, and the base station may be called a Node B, an evolved Node B (eNB), an access point, a Base Transceiver Station (BTS), a radio base station, a radio transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a home B node, a home evolved B node, a Transmission Reception Point (TRP), or any other suitable term in the art. As long as the same technical effect is achieved, the base station is not limited to a specific technical term, and it should be explained that in the embodiments of this application, only a base station in an NR system is introduced as an example, and the specific type of the base station is not limited.The core network devices are: Core Network Node, Core Network Function, 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 (Local NEF or L-NEF), Binding Support Function (BSF), Application Function (Application Node Function (ADF)), and Application Node Function (ADN). It should be noted that the embodiments of the present application only take the core network device in the NR system as an example, and do not limit the specific type of the core network device.

[0030] In the related technology, the R16 Type II codebook uses the beam combination principle to design the codebook. Taking into account the overhead problem of PMI feedback, the design of the R16 Type II codebook adds frequency domain compression, extends the maximum supported rank number to 4, and adds the distribution status of non-zero coefficients to indicate PMI feedback in a bitmap manner.

[0031] Here, the codebook generation for each layer may be expressed as follows:

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[0032] The terminal is

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[0033] (1)

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[0034] (2)

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[0035] [Table 1]

[0036] 2) Calculate 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 calculates the strongest coefficient tap index for each tap in the process of calculating the codebook.

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[0043] (3)

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[0044]

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[0045] In the related art, the PMI coefficients are i1 and i2, where i1 is 1,1 , i 1,2, i 1,5 , i 1,6、v , i 1,7,v , i 1,8,v i2 includes i 2,3,v , i 2,4,v , i 2,5,v where v=1, 2, 3, 4. When the RI value is 2, v=1, 2, and when the RI value is 4, v=1, 2, 3, 4.

[0046] Where: 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 the length

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[0049] i 1,6、v is fed back by layer v

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[0050] i 1,7,vis the non-zero coefficient indication of layer v, a bit sequence with total length

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

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[0052] i 2,3,v are the amplitude coefficient quantization instructions 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 not fed back and is assumed to be 1.

[0053] i 2,4,v is the amplitude coefficient quantization instruction for all tap coefficients of layer v. Each amplitude coefficient is a 3-bit bit string, and each codepoint corresponds to one quantization value, for a total of

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

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[0055] The specific mapping order of each coefficient is as 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. The lower the priority value, the higher the 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, the current R16 Type 2 codebook parameter definition and parameter value are mainly made for the PMI of one TRP. For the joint transmission method of multiple TRPs, when the spatial domain beam of each TRP needs to be fed back, it cannot be directly used, and a certain optimization space is required to reduce the feedback overhead, so feedback reinforcement may be performed to reduce the feedback overhead.

[0062] In the following, the PMI feedback method for multi-TRP transmission according to the embodiment of the present application will be described in detail through several embodiments and application scenarios thereof in conjunction with the drawings.

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

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

[0065] In an embodiment of the present application, the network side may configure target parameters for multiple TRPs for which joint transmission is allowed, where the target parameters may be indicated to the terminal by higher layer signaling or may be configured in the terminal by higher 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 TRPs.

[0068] In one alternative implementation, the target parameters may include the port configuration parameters of each TRP, i.e., the target parameters may include the port configuration parameters N 1,i and N 2,i and, where N 1,i and N 2,i are the number of antenna ports configured on two dimensions of the same polarization for the TRP i by the network side, where the TRP i is the (i+1)th TRP among the plurality of TRPs;

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[0069] In one alternative implementation, the target parameters include a port configuration parameter for each of the TRPs and a number of TRPs.

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[0070] In the above selective realization method, the network side selectively determines the number of TRPs that are allowed to be jointly transmitted.

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[0071] (1) The number of the multiple TRPs configured by the network side

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[0072] (2) determining a number of the plurality 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 of the TRPs, that is, the target parameter is: The predetermined number L of the target orthogonal beams, which is the predetermined number of the target orthogonal beams corresponding to the TRP i. i , or may further include a total number L_total of a predetermined number of the target orthogonal beams, which is the sum of the numbers of the target orthogonal beams corresponding to the multiple TRPs.

[0074] Step 2: According to the target parameters of TRP i, an oversampling factor O corresponding to TRP i is calculated based on the indication of upper layer signaling or preset information. 1,i and O 2,i where TRP i is the (i+1)th TRP of the plurality of TRPs;

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[0075] Step 3: The oversampling factor O of the obtained TRP i 1,i and O 2,i Based on the value of

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[0076] In one possible implementation manner, the network side may uniformly configure a set of target parameters for each of the TRPs, or may configure a set of target parameters for each of the TRPs respectively, so that obtaining the target parameters of each of the TRPs includes one of the following:

[0077] (1) The network side obtains a set of the target parameters uniformly configured for the multiple TRPs, and the target parameters of the multiple TRPs are the same. For example, the network side may uniformly configure a set of port configuration parameters N1 and N2 for the 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 the port configuration parameters N1 and N2. Also, for example, the network side may uniformly configure the predetermined number L for the multiple TRPs and instruct that the predetermined numbers corresponding to each TRP are all the same. Or, the network side may uniformly configure a set of target parameters N1 and N2 for the multiple TRPs. 2, L may be uniformly configured to indicate that the port configuration parameters and corresponding predetermined numbers of each TRP are all the same.

[0078] Alternatively, in the case of a set of target parameters uniformly configured for all the TRPs by the network side, the port configuration parameters N1 and N2 of the multiple TRPs are all the same, and therefore the oversampling coefficients O1 and O2 corresponding to each of the TRPs are also the same. Therefore, in order to save resources of the terminal, the network side may directly configure the oversampling coefficients O1 and O2. Therefore, in one possible implementation manner, the target parameters may further include values ​​of the oversampling coefficients O1 and O2, and the oversampling coefficient O corresponding to the TRP i may be set to 0. 1,i =O1, O 2,i=O2, that is, each TRP adopts the oversampling coefficients O1 and O2 values ​​of the same group.

[0079] (2) The network side obtains a set of the target parameters configured for each of the TRPs, and a set of the target parameters corresponding to each of the TRPs, respectively, where the target parameters configured for each of the TRPs are not completely the same. For example, for a TRP i among multiple TRPs, the network side obtains a set of port configuration parameters N for this TRP. 1,i and N 2,i For a TRP j among the multiple TRPs (where i is not equal to j), the network side may configure a set of port configuration parameters N 1,j and N 2,j where N 1,i and N 2,i and N 1,j and N 2,j may be the same or different, and for TRP i, the terminal 1,i and N 2,i For TRP j, the terminal obtains the orthogonal beam group set of TRP i using the port configuration parameter N 1,j and N 2,j For example, for TRP i among the multiple TRPs, the predetermined number configured for this TRP by the network side is L i For a TRP j among the multiple TRPs, the predetermined number configured for this TRP by the network side is L j And L i and L j may be the same or different.

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

[0081] S212, based on channel information of each of the TRPs, select a target orthogonal beam group corresponding to each of the TRPs from the orthogonal beam group set corresponding to each of the TRPs, and select a predetermined number of target orthogonal beams corresponding to each of the TRPs from the target orthogonal beam group.

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

[0083] Here, the channel information of 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 result.

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

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

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[0086] S214, determining a first feedback parameter for feeding back 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, where 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 the predetermined number of target orthogonal beams in each of the target orthogonal beam groups.

[0087] In an embodiment of the present application, the overhead of feedback of spatial domain parameters in PMI can be reduced by indicating target orthogonal beam groups corresponding to multiple TRPs using a first combination number, and / or indicating a predetermined number of target orthogonal beams in each of the target orthogonal beam groups using a second combination number.

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

[0089] Step 1: globally number the target orthogonal beam group numbers corresponding to each of the TRPs to obtain target orthogonal beam group information corresponding to the multiple TRPs.

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

[0091] (1) The number q of the beam orthogonal group of the TRP i 1,i andq 2,iq1=(i*O 1,i )+q 1,i , q2=q 2,i and numbered as follows: (2) The number q of the beam orthogonal group of the TRP i 1,i andq 2,i q2=(i*O 2,i )+q 2,i , q1=q 1,i and numbered as follows: (3) The number q of the beam orthogonal group of the TRP i 1,i andq 2,i q1 =

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[0092] Step 2: L corresponding to each TRP i Globally numbering the identifier information of the target orthogonal beams to obtain target orthogonal beam numbers corresponding to the plurality of TRPs, where the identifier information is identifier information of the target orthogonal beams in the target orthogonal beam group, and the identifier information is a parameter

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[0093] Selectively,

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

[0095] (1) L of the 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 indicating target orthogonal beam groups corresponding to the plurality of TRPs includes: The number of the target orthogonal beam group corresponding to each TRP is set as a first combination number.

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[0097] In one possible implementation, the first combination number

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[0098] Optionally, if the port configuration parameters of each TRP are the same, the oversampling coefficient values ​​corresponding to each TRP are also the same. If O1 and O2 are used, the target orthogonal beam group numbers corresponding to each TRP are set as a first combination number.

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[0099] In one possible implementation, determining the second number of combinations indicating the predetermined number of target orthogonal beams in each of the target orthogonal beam groups includes: The numbers of the target orthogonal beams corresponding to each of the TRPs are calculated as a 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, the values ​​of the oversampling coefficients corresponding to each TRP are also the same, denoted as O1 and O2, and a predetermined number of oversampling coefficients corresponding to each TRP are also denoted as O1 and O2.

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[0103] Where:

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

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

[0106] In an embodiment of the present 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 manner, before S216, the method may further include:

[0108] Step 1: Obtain the configuration parameters of the network side, and obtain the delay information number corresponding to each of the TRPs. In this step, obtain the delay information number corresponding to each TRP according to the configuration parameters of the network side.

[0109] Step 2: obtain delay information of the plurality of TRPs according to the number of delay information corresponding to each of the TRPs, where the PMI parameters further include delay information of the plurality of TRPs. In this step, the terminal may determine the number of delay information that needs to be obtained according to 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 corresponding to each TRP is different, the delay information of the multiple TRPs may be obtained based on the largest number of delay information among the multiple TRPs.

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

[0112] In one possible implementation manner, the terminal may further obtain a feedback coefficient for feeding back a coefficient matrix of the PMI, and then the PMI parameters may further include the feedback coefficient.

[0113] Alternatively, the terminal may set the amplitude of a TRP corresponding to the strongest coefficient in a coefficient matrix to a reference value, and quantize the amplitudes of the strongest coefficients of other TRPs among the plurality of TRPs based on the reference value to obtain an amplitude quantization coefficient between the TRPs.

[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 coefficient of other TRPs based on the strongest coefficient, and feeds back the corresponding TRP amplitude quantization coefficient. For example, 2,6,v Layer v

number

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

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

[0117] According to the above technical solution of the embodiments of the present application, for a joint transmission solution of multiple TRPs, when it is necessary to feed back the spatial domain beam of each TRP, global number feedback can be performed using the number of combinations, thereby reducing the feedback overhead; and by feeding back the amplitude between TRPs, the quantization accuracy can be further improved, which contributes to improving the precoding performance.

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

[0119] S310, the network side device indicates target parameters of multiple TPRs for which joint transmission is allowed to the terminal.

[0120] Here, the target parameters are the same as the target parameters in the method 200, see the description in the method 200 for details.

[0121] Optionally, the target parameters are: (1) A port configuration parameter N, which is the number of antenna ports 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 TRPs.

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[0122] In one possible implementation, the target parameters are a predetermined number L of target orthogonal beams. i where L i is the predetermined number of the target orthogonal beams corresponding to the TRP i.

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

[0124] In one possible implementation, the network side device transmits the number of the plurality of TRPs to the terminal.

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[0125] In one possible implementation, the network side device instructs the terminal of target parameters of multiple TPRs for which joint transmission is allowed, The network side device uniformly configures one set of the target parameters for the multiple TRPs and indicates that the target parameters of the multiple TRPs are the same; or The network side device configures one set of the target parameters for each of the TRPs and indicates one set of the target parameters corresponding to each of the TRPs, where the target parameters configured for each of the TRPs are not completely the same.

[0126] S312, receiving PMI parameters including a first feedback parameter and a second feedback parameter transmitted by the terminal, where the first feedback parameter includes a first combination number indicating target orthogonal beam groups corresponding to a plurality of the 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.

[0127] Here, the terminal can transmit the PMI parameters using the manner described in the above method 200, and for details, please refer to the description in the method 200, and no further description will be given here.

[0128] S314, the network side device obtains the PMI of each of the TRPs based on the PMI parameters.

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

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

[0131] FIG. 4 shows another flowchart of a PMI feedback method for multi-TRP transmission according to an embodiment of the present application. As shown in FIG. 4, the method 400 mainly includes the following steps:

[0132] S410, obtain PMI parameters.

[0133] S412, feedback the PMI parameters.

[0134] Optionally, obtaining the PMI parameters may include obtaining spatial domain (SD) parameters.

[0135] Optionally, obtaining the spatial domain parameters may include:

[0136] Step 1, obtain orthogonal beam group information.

[0137] Step 2, obtain beam information based on the orthogonal beam group information.

[0138] Here, obtaining the orthogonal beam group information and the orthogonal beam information includes the following manners.

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

[0140] Alternatively, orthogonal beam group information of each TRP in which JT transmission is permitted may be obtained in the following manner.

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

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[0142] In summary, orthogonal beam group information may be obtained, and the orthogonal beam group information may be:

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

[0144] Alternatively, orthogonal beam information for each TRP in which JT transmission is permitted may be obtained in the following manner.

[0145] For any one TRP,

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[0146] In summary, orthogonal beam information may be obtained, the orthogonal beam information being:

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[0147] (3) In cooperation with each other, obtain orthogonal beam group information for each TRP where JT transmission is permitted.

[0148] Alternatively, orthogonal beam group information of each TRP for which JT transmission is permitted may be obtained in a coordinated manner in the following manner.

[0149] First, the port and TRP number configuration parameter N is set based on higher layer signaling. 1, N 2, N trp For any one TRP, 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, respectively, and the number of ports in the two dimensions and N trp Determine two-dimensional beam oversampling coefficients O1 and O2 based on the above, and then assemble multiple orthogonal beam groups based on the port configurations and oversampling coefficients of all TRPs.

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

[0151] The orthogonal beam group information finally obtained is

number

[0152] (4) In cooperation with each other, orthogonal beam information of each TRP where JT transmission is permitted is obtained.

[0153] Alternatively, orthogonal beam information for each TRP in which JT transmission is permitted may be obtained in a coordinated manner in the following manner.

[0154] For every TRP, one orthogonal beam group G is created based on q1 and q2 of TRP i. i Determine where:

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[0155] For example, one beam instruction information of L orthogonal beam instruction information associated with TRP i is m=(i*N2)+m i , l=l i Alternatively, one beam instruction information among the L orthogonal beam instruction information associated with the TRP i is numbered m=m i , l=(i*N1)+l i And number them like this.

[0156] In summary, the orthogonal beam information finally obtained is

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[0157] In one possible implementation manner, when obtaining beam information according to a network instruction based on an orthogonal beam group, the network instructs that the number of beams for each TRP is not completely the same, i.e., the L values ​​corresponding to each TRP are not completely the same, or the network instructs 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 the PMI parameters may include feeding back spatial domain (SD) parameters.

[0159] Optionally, feeding back the SD parameters may include:

[0160] Step 1, feedback orthogonal beam group information; Step 2, feed back orthogonal beam information.

[0161] Optionally, feeding back the orthogonal beam group information may include feeding back the orthogonal beam group information of each TRP respectively.

[0162] For example, the parameter

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[0163] Or, the orthogonal beam group information of all TRPs is fed back using the combination number, for example, the orthogonal beam group information of all TRPs is mapped to the combination number.

[0164] For example, the parameter

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[0165] The network is a combination

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[0166] Optionally, feeding back the orthogonal beam information may include feeding back orthogonal beam information of each TRP using a respective combination number.

[0167] For example, the parameter

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[0168] The network side is the number of combinations

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[0169] Alternatively, the orthogonal beam information of all TRPs may be fed back using the number of combinations. For example, the orthogonal beam information of all TRPs is mapped to the number of combinations.

[0170] For example, the parameter

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[0171] The network side is the number of combinations

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[0172] In one possible implementation, obtaining PMI parameters may be obtaining frequency domain / delay domain parameters.

[0173] Optionally, obtaining the frequency domain or delay domain may include:

[0174] Step 1: Obtain the network configuration parameters and calculate the terminal feedback delay information quantity; Alternatively, the number may be the same for each TRP, or the number is not exactly the same for each TRP.

[0175] Step 2: The terminal obtains delay information of multiple TRPs based on the delay information number, and the delay information is represented by a DFT vector or other vector.

[0176] Optionally, when the number of delay information acquired by the terminal is different for each TRP, the terminal acquires delay information of multiple TRPs according to the maximum value.

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

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

[0179] Step 1: The terminal assumes that the amplitude of the TRP corresponding to the strongest coefficient is 1, quantizes the amplitudes 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 Layer V

number

[0181] Step 2: The terminal maps the amplitude quantization coefficients between the TRPs to Group 2 of CSI Part 2 and feeds them back. The mapping order is the polarization amplitude indication i 2,3,v before, or polarization amplitude indication i 2,3,v and window instruction i 1,5 Located between.

[0182] According to the above method, for a joint transmission scheme 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; and the quantization accuracy can be further improved by feeding back the amplitude between the TRPs, which contributes to improving the precoding performance.

[0183] In the feedback method of PMI for multi-TRP transmission according to the embodiment of the present application, the execution body may be a feedback device of PMI for multi-TRP transmission. In the embodiment of the present application, the feedback device of PMI for multi-TRP transmission according to the embodiment of the present application is taken as an example to execute the feedback method of PMI for multi-TRP transmission by the feedback device of PMI for multi-TRP transmission.

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

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

[0186] In one possible implementation manner, the first determining module 501 determines an orthogonal beam group set corresponding to each TRP based on target parameters configured for the TRP by the network side, Obtaining target parameters for each of the TRPs; According to the target parameters of TRP i, an oversampling factor O corresponding to TRP i is calculated based on the indication of higher layer signaling or preset information. 1,i and O 2,i where TRP i is the (i+1)th TRP of the plurality of TRPs;

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

number

[0188] In one possible implementation, the target parameters are: The predetermined number L of the target orthogonal beams, which is the predetermined number of the target orthogonal beams corresponding to the TRP i. i , or a total number L_total of a predetermined number of the target orthogonal beams, which is the sum of the numbers of the target orthogonal beams corresponding to the plurality of TRPs.

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

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[0190] In one possible implementation, the first determination module 501 obtains the target parameters of each TRP by: Obtaining a set of the target parameters uniformly configured for the plurality of TRPs by the network side, and indicating that the target parameters of the plurality of TRPs are the same; or Obtaining a set of the target parameters configured by the network side for each of the TRPs, respectively, and indicating a set of the target parameters corresponding to each of the TRPs, wherein the target parameters configured by the network side for each of the TRPs are not completely the same.

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

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

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[0193] In one possible implementation, the second decision module further comprises: Globally number the target orthogonal beam group corresponding to each TRP to obtain target orthogonal beam group information corresponding to the plurality of TRPs; L corresponding to each of the above TRPs i The identifier information of the target orthogonal beams is globally numbered to obtain target orthogonal beam numbers corresponding to the plurality of TRPs, where the identifier information is identifier information of the target orthogonal beams in the target orthogonal beam group, and the identifier information is a parameter

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[0194] In one possible implementation, globally numbering the target orthogonal beam groups corresponding to each of the TRPs includes: The number q of the beam orthogonal group of the TRP i 1,i andq 2,i q1=(i*O 1,i )+q 1,i , q2=q 2,i and numbering them as The number q of the beam orthogonal group of the TRP i 1,i andq 2,i q2=(i*O 2,i )+q 2,i , q1=q 1,i and numbering them as The number q of the beam orthogonal group of the TRP i 1,i andq 2,i q1 =

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[0195] In one possible implementation manner, globally numbering the identifier information of the Li target orthogonal beams corresponding to each of the TRPs includes: 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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[0196] In one possible implementation manner, the second determination module 503 determines the first combination number indicating target orthogonal beam groups corresponding to the plurality of TRPs, The number of the target orthogonal beam group corresponding to each TRP is set as a first combination number.

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[0197] In one possible implementation, the first combination number

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[0198] In one possible implementation manner, the second determination module 503 determines the second number of combinations indicating the predetermined number of target orthogonal beams in each of the target orthogonal beam groups by: The numbers of the target orthogonal beams corresponding to each of the TRPs are calculated as a second combination number.

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[0199] One possible implementation is:

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[0200] One possible implementation is:

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[0201] In one possible implementation, the second determination module 503 further comprises: Obtain network side configuration parameters, and obtain delay information numbers corresponding to each of the TRPs; Used to obtain delay information of the multiple TRPs based on the number of delay information corresponding to each of the TRPs, where the PMI parameters further include delay information of the multiple TRPs.

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

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

[0204] In one possible implementation, the second determination module 503 further comprises: and obtaining a feedback coefficient for feeding back a coefficient matrix of the PMI, where the PMI parameters further include the feedback coefficient.

[0205] In one possible implementation manner, the second determination module 503 obtains a feedback coefficient for feeding back the coefficient matrix of the PMI, The method includes setting the amplitude of a TRP corresponding to the strongest coefficient in the coefficient matrix to a reference value, and quantizing the amplitudes of the strongest coefficients of other TRPs among the plurality of TRPs based on the reference value to obtain amplitude quantization coefficients between the TRPs.

[0206] In one possible implementation manner, the first transmitting module 504 transmitting the PMI parameters includes mapping the PMI parameters to CSI and transmitting them, where the amplitude quantization coefficients between each of the TRPs are mapped to a second part of CSI and are located before the polarization amplitude indication in the PMI parameters or between the polarization amplitude indication and the window indication in the PMI parameters.

[0207] The feedback device of the PMI of multi-TRP transmission in the embodiment of the present application may be an electronic device, for example an electronic device having an operating system, or may be a component in an electronic device, for example an integrated circuit or chip. The electronic device may be a terminal or other device other than a terminal. Exemplarily, the terminal may include, but is not limited to, the types of terminal 11 listed above, and the other device may be a server, a network attached storage (NAS), etc., and the embodiment of the present application is not specifically limited.

[0208] The feedback device for PMI of multi-TRP transmission according to the embodiment of the present application can realize each process realized by the terminal of the embodiment of the method of Figures 2 to 4, and achieve the same technical effect, and will not be described further here in order to avoid repetition of description.

[0209] FIG. 6 shows a structural schematic diagram of an apparatus for acquiring PMI of multi-TRP transmission according to an embodiment of the present application. As shown in FIG. 6 , the apparatus 600 mainly includes a second sending module 601, a receiving module 602 and an acquiring module 603.

[0210] In an embodiment of the present application, the second transmitting module 601 is used to indicate target parameters of multiple TPRs for which joint transmission is allowed to a terminal, the receiving module 602 is used to receive PMI parameters including a first feedback parameter and a second feedback parameter transmitted by the terminal, where the first feedback parameter includes a first combination number indicating target orthogonal beam groups corresponding to multiple 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 the acquisition module 603 is used to acquire PMI of each of the TRPs based on the PMI parameters.

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

[0212] In one possible implementation, the target parameters are: The predetermined number L of the target orthogonal beams, which is the predetermined number of the target orthogonal beams corresponding to the TRP i. i , or a total number L_total of a predetermined number of the target orthogonal beams, which is the sum of the numbers of the target orthogonal beams corresponding to the plurality of TRPs.

[0213] In one possible implementation, the number of TRPs in the terminal is

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[0214] In one possible implementation, indicating to a terminal target parameters of a plurality of TPRs for which joint transmission is permitted includes: Uniformly configuring a set of the target parameters for the plurality of TRPs and indicating that the target parameters of the plurality of TRPs are the same; or Configuring a set of the target parameters for each of the TRPs, respectively, and indicating a set of the target parameters corresponding to each of the TRPs, wherein the target parameters configured for each of the TRPs are not exactly the same.

[0215] The PMI acquisition device for multi-TRP transmission according to the embodiment of the present application can realize each process realized by the network side or network side equipment in the method embodiments of Figures 2 to 4, and achieve the same technical effects, and will not be described further here in order to avoid repetition of description.

[0216] Optionally, as shown in Fig. 7, the embodiment of the present application further provides a communication device 700, which includes a processor 701 and a memory 702, and the memory 702 stores a program or instruction that can run on the processor 701, for example, when the communication device 700 is a terminal, when the program or instruction is executed by the processor 701, each step of the embodiment of the feedback method for PMI of multi-TRP transmission can be realized, and the same technical effect can be achieved. When the communication device 700 is a network side device, when the program or instruction is executed by the processor 701, each step of the embodiment of the acquisition method for PMI of multi-TRP transmission can be realized, and the same technical effect can be achieved, and in order to avoid repetition, no further description will be given here.

[0217] The embodiment of the present application further provides a terminal, which includes a processor and a communication interface, the processor is used to realize each step of the embodiment of the PMI feedback method for multi-TRP transmission, and the communication interface is used to communicate with an external device. The embodiment of the terminal corresponds to the embodiment of the method on the terminal side, and each implementation process and realization manner of the embodiment of the method can be applied to the embodiment of the terminal, and the same technical effect can be achieved. Specifically, FIG. 8 is a schematic diagram of a hardware structure for realizing the terminal of the embodiment of the present application.

[0218] The terminal 800 includes at least some of the following components, but is not limited to: 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 can be understood by those skilled in the art, the terminal 800 may further include a power source (e.g., a battery) for powering each component, and the power source may be logically connected to the processor 810 by a power management system, so that the power management system can realize functions such as charge / discharge management and power consumption management. The structure of the terminal shown in FIG. 8 does not constitute a limitation on the terminal, and the terminal may include more or less components than the number of components shown, or a combination of some components, or a different arrangement of components, and will not be further described here.

[0220] It should be understood that in the embodiment of the present application, the input unit 804 may include a graphics processor (Graphics Processing Unit, GPU) 8041 and a microphone 8042, and the GPU 8041 processes image data of still or video captured by an image capture device (e.g., a camera) in a video capture mode or an image capture mode. The display unit 806 may include a display panel 8061, and the display panel 8061 may be configured in the form of a liquid crystal display, an organic light emitting diode, 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 touch screen. 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, and an operation lever, which will not be described further herein.

[0221] In the embodiment of the present application, after receiving downlink data from the network side device, the radio frequency unit 801 can transmit the downlink data to the processor 810 for processing, and the radio frequency unit 801 can transmit uplink data to the network side device. In general, the radio frequency unit 801 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

[0222] The memory 809 may be used to store software programs or instructions and various data. The memory 809 may include a first storage area that mainly stores programs or instructions and a second storage area that stores data, where the first storage area can store an operating system, application programs or instructions required for at least one function (e.g., audio playback function, image playback function, etc.), etc. The memory 809 may include volatile memory or non-volatile memory, or the memory 809 may include both volatile and non-volatile memory. Here, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be Random Access Memory (RAM), Static Random Access Memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM, 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 (Direct Rambus RAM, DRRAM). Memory 809 in embodiments of the present application may include, 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 mainly processes operations related to the operating system, user interface, and application programs, etc., and the modem processor mainly processes wireless communication signals, such as a baseband processor. As can be understood, the modem processor may not be integrated into the processor 810.

[0224] Here, the processor 810: Determine an orthogonal beam group set corresponding to each TRP based on target parameters configured by the network side for the plurality of TRPs for which joint transmission is allowed; According to the channel information of each of the TRPs, select a target orthogonal beam group corresponding to the TRP from the orthogonal beam group set corresponding to each of the TRPs, and select a predetermined number of target orthogonal beams corresponding to each of the TRPs from the target orthogonal beam group; is used to determine a first feedback parameter for feeding back 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, where 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 the predetermined number of target orthogonal beams in each of the target orthogonal beam groups; The radio frequency unit 801 is used for transmitting PMI parameters including the first feedback parameter and the second feedback parameter.

[0225] The embodiment of the present application further provides a network side device, which includes a processor and a communication interface, the processor is used to realize each step of the embodiment of the method for obtaining PMI of multi-TRP transmission, and the communication interface is used to communicate with an external device. The embodiment of the network side device corresponds to the embodiment of the method of the network side device, and each implementation process and realization manner of the embodiment of the method can be applied to the embodiment of the network side device, and the same technical effects can be achieved.

[0226] Specifically, an embodiment of the present application further provides a network side device. As shown in Fig. 9, the network side device 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 through 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, and the radio frequency device 902 transmits the received information through the antenna 901 after processing it.

[0227] The methods performed by the network side equipment in the above embodiments may be implemented in a 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 FIG. 9, one of the chips is, for example, a baseband processor, which is connected to a memory 905 via a bus interface to call a program in the memory 905 and perform the network equipment operations shown in the above method embodiments.

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

[0230] Specifically, the network side device 900 of the embodiment of the present application further includes instructions or programs stored in the memory 905 and capable of running on the processor 904, and the processor 904 calls the instructions or programs in the memory 905 to execute the method performed by each module shown in FIG. 6, and achieves the same technical effect, which will not be described further here in order to avoid repetition of description.

[0231] An embodiment of the present application further provides a readable storage medium, which stores a program or instruction, and when the program or instruction is executed by a processor, each process of the embodiment of the feedback method for PMI of multi-TRP transmission is realized, or each process of the embodiment of the acquisition method for PMI of multi-TRP transmission is realized, and the same technical effect can be achieved, and in order to avoid repetition, no further description will be given here.

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

[0233] An embodiment of the present application further provides a chip, the chip including a processor and a communication interface, the communication interface being coupled to the processor, the processor being used to run a program or instruction to realize each process of the embodiment of the feedback method for PMI of multi-TRP transmission, or to realize each process of the embodiment of the method for acquiring PMI of multi-TRP transmission, and can achieve the same technical effect, and in order to avoid repetition of description, no further description will be given here.

[0234] It should be understood that the chips referred to in the embodiments of the present application may be referred to as system level chips, system chips, chip systems, or systems on chips.

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

[0236] An embodiment of the present application further provides a feedback system for PMI for multi-TRP transmission, the system including a terminal and a network side equipment, the terminal may be used to perform steps of the feedback method for PMI for multi-TRP transmission described above, and the network side equipment may be used to perform steps of the method for acquiring PMI for multi-TRP transmission described above.

[0237] It should be explained that in this specification, the terms "comprise", "include", or any other variants thereof are intended to cover the non-exclusive "comprise", whereby a process, method, article, or apparatus that includes a set of elements includes not only those elements, but also other elements not expressly listed or inherent to such process, method, article, or apparatus. In the absence of further limitations, an element limited by the phrase "comprises a" does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes this element. It should be pointed out that the scope of the method and apparatus in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may include performing functions in an essentially simultaneous manner or in reverse order based on the functions involved, for example, the described method can be performed in a different order than described, and various steps can be added, omitted, or combined. Also, features described with reference to some examples can be combined in other examples.

[0238] From the above description of the embodiments, it is clear to those skilled in the art that the methods of the above embodiments can be realized in the form of software and a necessary general-purpose hardware platform. Of course, they can also be realized in hardware, but in many cases the former is a more preferred embodiment. In light of this understanding, the technical proposal of the present application may be substantially or the part that contributes to the prior art may be embodied in the form of a computer software product, which is stored in a storage medium (e.g., ROM / RAM, magnetic disk, optical disk) and includes some instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0239] The above describes the embodiments of the present application in conjunction with the drawings, but the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not limiting. Those skilled in the art can take the suggestions of this application and make many forms without departing from the spirit and scope of the claims of this application, all of which belong to the protection scope of this application.

Claims

1. A method for feedback of a precoding matrix indication PMI for a multi-transmission / reception point TRP transmission, comprising: The terminal determines an orthogonal beam group set corresponding to each of the TRPs based on target parameters configured by the network side for the multiple TRPs for which joint transmission is allowed; Based on channel information of each of the TRPs, select a target orthogonal beam group corresponding to the TRP from the orthogonal beam group set corresponding to each of the TRPs, and select a predetermined number of target orthogonal beams corresponding to each of the TRPs from the target orthogonal beam group; determining a first feedback parameter for feeding back 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, the first feedback parameter including a first combination number indicating target orthogonal beam groups corresponding to the plurality of TRPs, and / or the second feedback parameter including a second combination number indicating the predetermined number of target orthogonal beams in each of the target orthogonal beam groups; and transmitting, by the terminal, PMI parameters including the first feedback parameter and the second feedback parameter.

2. The terminal determines an orthogonal beam group set corresponding to each of the TRPs based on target parameters configured by the network side for the plurality of TRPs for which joint transmission is allowed, Obtaining target parameters for each of the TRPs; According to the target parameters of TRP i, based on the indication of higher layer signaling or preset information, the oversampling factor O corresponding to TRP i is calculated. １，ｉ and O ２，ｉ where TRP i is the (i+1)th TRP among the plurality of TRPs; [0010] and [0025] is the number of the plurality of TRPs; The obtained oversampling coefficient O of the TRP i １，ｉ and O ２，ｉ Based on the value of １，ｉ *O ２，ｉ orthogonal beam group set having orthogonal beam groups [0030] and obtaining a signal from said first and second inputs.

3. The target parameters are: A port configuration parameter N, which is the number of antenna ports configured on two dimensions of the same polarization for each TRP i by the network side. １，ｉ and N ２，ｉ or The port configuration parameter N １，ｉ and N ２，ｉ and the number of the plurality of TRPs [0045] The method of claim 2 , comprising:

4. The target parameters are: The predetermined number L of the target orthogonal beams, which is the predetermined number of the target orthogonal beams corresponding to the TRP i. ｉ , The method of claim 2 or 3, further comprising a total number L_total of a predetermined number of the target orthogonal beams, the total number L_total being the sum of the number of the target orthogonal beams corresponding to the plurality of TRPs.

5. Obtaining a target parameter for each of the TRPs includes: The number of the plurality of TRPs configured by the network side [0050] or The number of the plurality of TRPs based on the configured target information [006] 4. The method of claim 3, further comprising: obtaining a target information including one of a channel measurement resource (CMR), a transmission configuration indication (TCI), and higher layer configuration signaling.

6. Obtaining a target parameter for each of the TRPs includes: Obtaining a set of the target parameters uniformly configured for the plurality of TRPs by the network side, where the target parameters of the plurality of TRPs are the same; or The method of claim 3 or 4, comprising obtaining a set of target parameters configured respectively for each TRP by the network side, wherein the target parameters of each TRP configuration are not completely the same.

7. In the case of a set of target parameters uniformly configured for each TRP by the network side, the target parameters include an oversampling factor O １ and O ２ The oversampling coefficient O corresponding to the TRP i is further included. １，ｉ =O １ , O ２，ｉ =O ２ The method according to claim 5, wherein

8. Selecting a target orthogonal beam group corresponding to each of the TRPs from the orthogonal beam group set corresponding to each of the TRPs based on channel information of each of the TRPs, and selecting a predetermined number of target orthogonal beams corresponding to each of the TRPs from the target orthogonal beam group, Based on the channel information of TRP i, the orthogonal beam group number of TRP i [0070] and [0080] wherein the TRP i is the (i+1)th TRP among the plurality of TRPs; [0090] and [0010] is the number of the plurality of TRPs; ##EQU00011## and ##EQU00012## Based on the above, the orthogonal beam group set corresponding to the TRP i is ##EQU00013## determining one of the target orthogonal beam groups in ##EQU14## and ##EQU00015## and the target orthogonal beam group includes N １，ｉ *N ２，ｉ orthogonal beams; Using the channel information of the TRP i, L corresponding to the TRP i is selected from the target orthogonal beam group. ｉ obtaining L target orthogonal beams, ｉ The method of claim 2 , wherein i is a predetermined number of the target orthogonal beams corresponding to the TRP i.

9. Before determining a first feedback parameter for feeding back target orthogonal beam groups corresponding to a plurality of the TRPs and a second feedback parameter for feeding back the predetermined number of target orthogonal beams in each of the target orthogonal beam groups, the method further comprises: Globally numbering the target orthogonal beam group corresponding to each of the TRPs to obtain target orthogonal beam group information corresponding to the plurality of TRPs; L corresponding to each of the TRPs ｉ and globally numbering the identifier information of the target orthogonal beams to obtain target orthogonal beam numbers corresponding to the plurality of TRPs, where the identifier information is identifier information of the target orthogonal beams in the target orthogonal beam group, and the identifier information is a parameter ##EQU00016## and ##EQU00017## and [0018] and [0019] is an integer, and [0020] and ##EQU00021## The method according to claim 8, wherein

10. Globally numbering the target orthogonal beam groups corresponding to each of the TRPs includes: The number q of the beam orthogonal group of the TRP i １,ｉ andq ２,ｉ Each １ = (i * O １，ｉ ) + q １,ｉ , q ２ =q ２,ｉ and numbering them as The number q of the beam orthogonal group of the TRP i １,ｉ andq ２,ｉ Each ２ = (i * O ２，ｉ ) + q ２,ｉ , q １ =q １,ｉ and numbering them as The number q of the beam orthogonal group of the TRP i １,ｉ andq ２,ｉ Each １ = [0022] +q １,ｉ , q ２ =q ２,ｉ and numbering them as The number q of the beam orthogonal group of the TRP i １,ｉ andq ２,ｉ Each ２ = [0023] +q ２,ｉ , q １ =q １,ｉ and numbering the Where: ##EQU00024## The method of claim 9 , wherein k represents an oversampling factor for TRP k of the plurality of TRPs.

11. L corresponding to each of the TRPs ｉ globally numbering the identifier information of the target orthogonal beams L of the TRP i ｉ The identifier information of one of the target orthogonal beams is numbered, and the target orthogonal beam number is: [0025] and L of the TRP i ｉ The identifier information of one of the target orthogonal beams is numbered, and the target orthogonal beam number is: [0026] and L of the TRP i ｉ The identifier information of one of the target orthogonal beams is numbered, and the target orthogonal beam number is: [0027] and L of the TRP i ｉ The identifier information of one of the target orthogonal beams is numbered, and the target orthogonal beam number is: [0028] and obtaining Where: [0029] 10. The method of claim 9, wherein: represents a port configuration parameter of TRP k.

12. Determining a first feedback parameter for feeding back a target orthogonal beam group corresponding to the plurality of TRPs includes: The number of the target orthogonal beam group corresponding to each of the TRPs is set as a first combination number. [0030] where i １,１ is an orthogonal vector group corresponding to the plurality of TRPs [0031] Vector group numbers [0032] where TRP i is the (i+1)th TRP of the plurality of TRPs; [Equation 33] and [0034] is the number of the plurality of TRPs, [Equation 35] is the oversampling factor of the obtained TRP i, [0036] represents the number of the plurality of TRPs, [Equation 37] teeth, [Equation 38] orthogonal beam groups are selected. [0039] The method of claim 1 , wherein the number of combinations corresponds to a number of target orthogonal beam groups.

13. First combination number [0040] The mapping relationship between the number of the target orthogonal beam group corresponding to each TRP is as follows: [0041] where [0042] or [0043] and [0044] is the global number of the i-th target orthogonal beam group, [0045] and [0046] is the number of the target beam group corresponding to the i-th TRP [0047] represents [0048] is the number of the target beam group corresponding to the TRP i [0049] where: [Number 50] and [0051] or [0052] and [0,53] The method of claim 12, wherein

14. Determining a second feedback parameter for feeding back the predetermined number of target orthogonal beams in each of the target orthogonal beam groups includes: The numbers of the predetermined number of target orthogonal beams corresponding to each of the TRPs are set as a second combination number. [0,54] where: [0.55] is a combination number of all the target orthogonal beam groups indicated by the first combination number. [0,56] is used to indicate the number of the target orthogonal beams; [0.57] The method of claim 12 , wherein x is a predetermined number of the target orthogonal beams for TRP i. 【Request 15】 【Number 58】 where: [0,59] is the number of antenna ports configured on two dimensions of the same polarization for the TRP i by the network side; [0.60] teeth, [0061] orthogonal beams are selected [0062] The method of claim 14 , wherein the number of combinations of target orthogonal beams is represented by the number of combinations of target orthogonal beams. 【Request 16】 【Number 63】 and [0,64] The mapping relationship between the target orthogonal beam numbers is [0.65] where [0.66] or [0.67] where: [0068] is the global number of the i-th target orthogonal beam, [0,69] and [Number 70] is the number of the i-th target orthogonal beam [Equation 71] represents [Equation 72] is the number of the i-th target orthogonal beam [Equation 73] where: [74] and [Number 75] or [76] and [77] The method of claim 15, wherein

17. Before the terminal transmits the PMI parameters, the method further comprises: Obtaining network-side configuration parameters and obtaining delay information numbers corresponding to each of the TRPs; The method according to any one of claims 1 to 16, further comprising: obtaining delay information of the plurality of TRPs based on the number of delay information corresponding to each of the TRPs, wherein the PMI parameters further include delay information of the plurality of TRPs.

18. The method of claim 17 , wherein the number of delay information bits is different for different TRPs.

19. The method of claim 18, wherein obtaining delay information of the plurality of TRPs based on the number of delay information corresponding to each of the TRPs includes obtaining delay information of the plurality of TRPs based on the largest number of delay information among the plurality of TRPs.

20. Before the terminal transmits the PMI parameters, the method further comprises: The method according to claim 1 , further comprising: the terminal obtaining a feedback coefficient for feeding back a coefficient matrix of the PMI, where the PMI parameters further include the feedback coefficient.

21. Obtaining a feedback coefficient for feeding back a coefficient matrix of the PMI by the terminal The method of claim 20, comprising: the terminal setting the amplitude of a TRP corresponding to the strongest coefficient in the coefficient matrix to a reference value, and quantizing the amplitudes of the strongest coefficients of other TRPs among the plurality of TRPs based on the reference value to obtain an amplitude quantization coefficient between each of the TRPs.

22. The method of claim 21, wherein the terminal transmitting the PMI parameters includes the terminal mapping and transmitting the PMI parameters to channel state information CSI, where an amplitude quantization coefficient between each of the TRPs is mapped to a second part of CSI and is located before a polarization amplitude indication in the PMI parameters or between a polarization amplitude indication and a window indication in the PMI parameters.

23. A method for acquiring a PMI for a multi-TRP transmission, comprising: A network side device indicates target parameters of a plurality of TPRs for which joint transmission is permitted to a terminal; Receiving PMI parameters including a first feedback parameter and a second feedback parameter transmitted by the terminal, the first feedback parameter including a first combination number indicating target orthogonal beam groups corresponding to a plurality of the TRPs, and / or the second feedback parameter including a second combination number indicating the predetermined number of target orthogonal beams in each of the target orthogonal beam groups; The method includes the network side equipment obtaining a PMI of each of the TRPs based on the PMI parameter.

24. The target parameters are: A port configuration parameter N is the number of antenna ports configured on two dimensions of the same polarization by the network side for TRP i, １，ｉ and N ２，ｉ or The port configuration parameter N １，ｉ and N ２，ｉ and the number of the plurality of TRPs [78] Including, Here, the TRP i is the (i+1)th TRP among the plurality of TRPs, [79] 24. The method of claim 23, wherein:

25. The target parameters are: The predetermined number L of the target orthogonal beams, which is the predetermined number of the target orthogonal beams corresponding to the TRP i. ｉ , 25. The method of claim 24, further comprising a total number L_total of the predetermined number of target orthogonal beams, the total number L_total being the sum of the number of target orthogonal beams corresponding to the plurality of TRPs.

26. The network side device instructs a terminal of target parameters of a plurality of TPRs for which joint transmission is permitted, The number of the plurality of TRPs for the terminal is [Number 80] or The number of the plurality of TRPs is determined based on the target information in which the network side device is configured. [Number 81] 25. The method of claim 24, comprising indicating, where the target information includes one of a channel measurement resource (CMR), a transmission configuration indication (TCI), and higher layer configuration signaling.

27. The network side device instructs a terminal of target parameters of a plurality of TPRs for which joint transmission is permitted, The network side device uniformly configures a set of the target parameters for the plurality of TRPs and indicates that the target parameters of the plurality of TRPs are the same; or A method according to any one of claims 23 to 26, comprising the network side equipment configuring one set of the target parameters for each of the TRPs and indicating one set of the target parameters corresponding to each of the TRPs, wherein the target parameters configured for each of the TRPs are not completely the same.

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

29. The first determination module determines an orthogonal beam group set corresponding to each of the TRPs, Obtaining target parameters for each of the TRPs; According to the target parameters of TRP i, based on the indication of higher layer signaling or preset information, the oversampling factor O corresponding to TRP i is calculated. １，ｉ and O ２，ｉ where TRP i is the (i+1)th TRP among the plurality of TRPs; [0082] and [Number 83] is the number of the plurality of TRPs; The obtained oversampling coefficient O of the TRP i １，ｉ and O ２，ｉ Based on the value of １，ｉ *O ２，ｉ orthogonal beam group set having orthogonal beam groups [Number 84] and obtaining the signal.

30. The first determination module obtains a target parameter for each of the TRPs, Obtaining a set of the target parameters uniformly configured for the plurality of TRPs by the network side, and indicating that the target parameters of the plurality of TRPs are the same; or The device of claim 29, comprising obtaining a set of the target parameters configured for each of the TRPs by a network side, and indicating a set of the target parameters corresponding to each of the TRPs, wherein the target parameters configured for each of the TRPs by the network side are not completely the same.

31. The selection module selects a target orthogonal beam group corresponding to each of the TRPs from the orthogonal beam group set corresponding to each of the TRPs, and selects a predetermined number of target orthogonal beams corresponding to each of the TRPs from the target orthogonal beam group. Based on the channel information of TRP i, the orthogonal beam group number of TRP i [Number 85] and [Number 86] wherein the TRP i is the (i+1)th TRP among the plurality of TRPs; [Number 87] and [Number 88] is the number of the plurality of TRPs; [Number 89] and [Number 90] Based on the above, the orthogonal beam group set corresponding to the TRP i is [Number 91] determining one of the target orthogonal beam groups in [Number 92] and [Number 93] and the target orthogonal beam group includes N １，ｉ *N ２，ｉ orthogonal beams; Using the channel information of the TRP i, L corresponding to the TRP i is selected from the target orthogonal beam group. ｉ obtaining L target orthogonal beams, ｉ is a predetermined number of the target orthogonal beams corresponding to the TRP i.

32. The second determination module further comprises: Globally number the target orthogonal beam group numbers corresponding to each of the TRPs to obtain target orthogonal beam group information corresponding to the plurality of TRPs; L corresponding to each of the TRPs ｉ The identifier information of the target orthogonal beams is globally numbered to obtain the numbers of the target orthogonal beams corresponding to the plurality of TRPs, where the identifier information is identifier information of the target orthogonal beams in the target orthogonal beam group, and the identifier information is a parameter [Number 94] and [Number 95] and [Number 96] and [Number 97] is an integer, and [Number 98] and [Number 99] 32. The apparatus of claim 31 ,

33. The second determination module determines a first feedback parameter for feeding back a target orthogonal beam group corresponding to a plurality of the TRPs, The number of the target orthogonal beam group corresponding to each of the TRPs is set as a first combination number. [Number 100] where i １,１ is an orthogonal vector group corresponding to the plurality of TRPs [Number 101] Vector group numbers [00102] where TRP i is the (i+1)th TRP of the plurality of TRPs; [00103] and [Equation 104] is the number of the plurality of TRPs, [Number 105] is the oversampling factor of the obtained TRP i, [Number 106] represents the number of the plurality of TRPs, [Equation 107] teeth, [Number 108] orthogonal beam groups are selected. [Number 109] 33. The apparatus of claim 28, wherein the combination number corresponds to a number of target orthogonal beam groups.

34. The second determination module determines a second feedback parameter for feeding back the predetermined number of target orthogonal beams in each of the target orthogonal beam groups, The numbers of the predetermined number of target orthogonal beams corresponding to each of the TRPs are set as a second combination number. [Equation 110] where: [Equation 111] is a combination number of all the target orthogonal beam groups indicated by the first combination number. [Equation 112] is used to indicate the number of the target orthogonal beams; [Equation 113] 34. The apparatus of claim 33, wherein x is a predetermined number of the target orthogonal beams for TRP i.

35. The second determination module further comprises: Obtain network-side configuration parameters, and obtain delay information numbers corresponding to each of the TRPs; The device of any one of claims 28 to 34, wherein the PMI parameters are used to obtain delay information of the multiple TRPs based on the number of delay information corresponding to each TRP, wherein the PMI parameters further include delay information of the multiple TRPs.

36. The second determination module further comprises:

35. The apparatus of claim 28, adapted to obtain feedback coefficients for feeding back a coefficient matrix of the PMI, wherein the PMI parameters further include the feedback coefficients.

37. 37. The apparatus of claim 36, wherein the first transmission module transmits the PMI parameters including mapping and transmitting the PMI parameters to CSI, wherein an amplitude quantization coefficient between each of the TRPs is mapped to a second portion of CSI and is located before a polarization amplitude indication in the PMI parameters or between a polarization amplitude indication and a window indication in the PMI parameters.

38. A PMI acquisition device for multi-TRP transmission, comprising: a second transmitting module for indicating to the terminal target parameters of a plurality of TPRs for which joint transmission is permitted; A receiving module for receiving PMI parameters including a first feedback parameter and a second feedback parameter transmitted by the terminal, the first feedback parameter including a first combination number indicating target orthogonal beam groups corresponding to a plurality of the TRPs, and / or the second feedback parameter including a second combination number indicating the predetermined number of target orthogonal beams in each of the target orthogonal beam groups; and an acquisition module for acquiring a PMI for each of the TRPs based on the PMI parameters.

39. A terminal comprising a processor and a memory, the memory storing a program or instructions operable on the processor, the program or instructions, when executed by the processor, realizing the steps of a method for feedback of PMI for multi-TRP transmission according to any one of claims 1 to 22.

40. A network side device comprising a processor and a memory, the memory storing a program or instructions capable of running on the processor, and when the program or instructions are executed by the processor, the network side device realizing the steps of the method for acquiring a PMI for a multi-TRP transmission described in any one of claims 23 to 27.

41. A readable storage medium having a program or instructions stored therein, which, when executed by a processor, realizes the steps of a PMI feedback method for multi-TRP transmission described in any one of claims 1 to 22, or realizes the steps of a PMI acquisition method for multi-TRP transmission described in any one of claims 23 to 27.

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