Method and apparatus for determining power offset parameter, terminal, and network-side device

Abstract

The present application relates to the technical field of communications, and discloses a method and apparatus for determining a power offset parameter, a terminal, and a network-side device. The method for determining a power offset parameter according to an embodiment of the present application comprises: a terminal acquires first information (201); and, on the basis of the first information, the terminal determines a power offset parameter, the power offset parameter being used for indicating a power offset between a physical downlink shared channel (PDSCH) signal and a channel state information reference signal (CSI-RS), and the first information being used for indicating an association between at least one transmit-receive point (TRP) of a network-side device and the power offset parameter (202).

Description

Method, device, terminal and network-side equipment for determining power bias parameters

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on December 29, 2023, with application number 202311874248.6 and invention name “Method, device, terminal and network-side equipment for determining power bias parameters”. The entire contents of the Chinese patent application are incorporated herein by reference. Technical Field

[0003] The present application belongs to the field of communication technology, and specifically relates to a method, apparatus, terminal, and network-side equipment for determining a power bias parameter. Background Art

[0004] Cell-free networks typically support N Transmit-Receive Points (TRPs) for data transmission to enhance transmission performance, where N ≥ 1. Network-side devices can configure whether user equipment (UE) must feedback coherent joint transmission (CJT) channel state information (CSI) corresponding to the N TRPs. When the UE is configured to select any M (M ≤ N) TRPs from the N TRPs to feedback CSI, the UE can select a TRP coordination cluster for data transmission based on the implementation. The TRP coordination cluster includes M (M ≤ N) TRPs, corresponding to M Channel State Information Reference Signal (CSI-RS) resources, and reports channel state information, such as channel quality indicator (CQI), for the TRP coordination cluster during physical downlink shared channel (PDSCH) data transmission. The CQI is calculated by the UE by measuring the CSI-RS, and the network-side device controls the UE to report it. The network-side device then selects the appropriate modulation order, code rate, downlink data block size, etc. based on the CQI information to ensure that the UE obtains the best PDSCH downlink performance in different wireless environments.

[0005] In related technologies, the number and composition of TRPs in a TRP collaboration cluster can be dynamically changed based on the UE's implementation. However, when the TRP collaboration cluster changes dynamically, the network-side equipment cannot know the number and composition of the TRPs in the TRP cluster in advance, and thus cannot configure the corresponding power offset parameters. This results in a mismatch between the CQI calculated and fed back by the UE and the actual CQI during the actual physical downlink shared channel (PDSCH) signal transmission, making it impossible for the network-side equipment to obtain the accurate CQI reported by the UE during PDSCH transmission.

[0006] Therefore, when the UE performs PDSCH CQI calculation based on the selected TRP coordination cluster, how to determine the power offset parameter corresponding to the TRP coordination cluster is a problem that needs to be solved urgently. Summary of the Invention

[0007] The embodiments of the present application provide a method, apparatus, terminal, and network-side equipment for determining a power offset parameter, which can solve the problem of how to determine the power offset parameter corresponding to a TRP collaboration cluster.

[0008] In a first aspect, a method for determining a power offset parameter is provided, the method being performed by a terminal, the method comprising:

[0009] The terminal obtains the first information;

[0010] The terminal determines a power bias parameter based on the first information; the power bias parameter is used to indicate the power offset between the physical downlink shared channel PDSCH signal and the channel state information reference signal CSI-RS, and the first information is used to indicate the association relationship between at least one transmission receiving point TRP of the network side device and the power bias parameter.

[0011] In a second aspect, a method for determining a power offset parameter is provided, which is performed by a network-side device. The method includes:

[0012] The network side device sends the first information to the terminal; the power bias parameter is used to indicate the power offset between the physical downlink shared channel PDSCH signal and the channel state information reference signal CSI-RS, and the first information is used to indicate the association between at least one transmission receiving point TRP of the network side device and the power bias parameter.

[0013] In a third aspect, a device for determining a power offset parameter is provided, comprising:

[0014] An acquisition module, configured to acquire first information;

[0015] A determination module is used to determine a power bias parameter based on the first information; the power bias parameter is used to indicate the power offset between the physical downlink shared channel PDSCH signal and the channel state information reference signal CSI-RS, and the first information is used to indicate the association relationship between at least one transmission receiving point TRP of the network side device and the power bias parameter.

[0016] In a fourth aspect, a device for determining a power offset parameter is provided, comprising:

[0017] The first sending module is used to send the first information to the terminal; the power bias parameter is used to indicate the power offset between the physical downlink shared channel PDSCH signal and the channel state information reference signal CSI-RS, and the first information is used to indicate the association relationship between at least one transmission receiving point TRP of the network side device and the power bias parameter.

[0018] In a fifth aspect, a terminal is provided, comprising a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method described in the first aspect are implemented.

[0019] In the sixth aspect, a terminal is provided, comprising a processor and a communication interface, wherein the communication interface is used to obtain first information, and the processor is used to determine a power bias parameter based on the first information; the power bias parameter is used to indicate the power offset between the physical downlink shared channel PDSCH signal and the channel state information reference signal CSI-RS, and the first information is used to indicate the association relationship between at least one transmission receiving point TRP of the network side device and the power bias parameter.

[0020] In the seventh aspect, a network side device is provided, which includes a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the program or instructions are executed by the processor, the steps of the method described in the second aspect are implemented.

[0021] In the eighth aspect, a network side device is provided, including a processor and a communication interface, wherein the communication interface is used to send first information to the terminal; the power bias parameter is used to indicate the power offset between the physical downlink shared channel PDSCH signal and the channel state information reference signal CSI-RS, and the first information is used to indicate the association relationship between at least one transmission receiving point TRP of the network side device and the power bias parameter.

[0022] In the ninth aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method described in the second aspect are implemented.

[0023] In the tenth aspect, a wireless communication system is provided, comprising: a terminal and a network side device, wherein the terminal can be used to execute the steps of the method described in the first aspect, and the network side device can be used to execute the steps of the method described in the second aspect.

[0024] In the eleventh aspect, a chip is provided, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the method as described in the first aspect, or to implement the method as described in the second aspect.

[0025] In the twelfth aspect, a computer program / program product is provided, which is stored in a storage medium and is executed by at least one processor to implement the method as described in the first aspect, or to implement the steps of the method as described in the second aspect.

[0026] In an embodiment of the present application, the terminal determines a power bias parameter based on the acquired first information; wherein the first information is used to indicate an association relationship between at least one TRP of a network-side device and a power bias parameter, and the power bias parameter is used to indicate a power offset between a PDSCH signal and a CSI-RS; in the above method, the terminal pre-acquires an association relationship between each possible TRP collaboration cluster under different TRP numbers and the power bias parameter corresponding to the TRP collaboration cluster, so that when the terminal selects a TRP collaboration cluster for data transmission according to implementation, it can determine an accurate power bias parameter based on the association relationship between the selected TRP collaboration cluster and the power bias parameter. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] FIG1 shows a block diagram of a wireless communication system to which embodiments of the present application may be applied;

[0028] FIG2 is a flow chart of a method for determining a power bias parameter according to an embodiment of the present application;

[0029] FIG3 is a second flow chart of a method for determining a power bias parameter according to an embodiment of the present application;

[0030] FIG4 is a schematic diagram of a structure of a device for determining a power offset parameter according to an embodiment of the present application;

[0031] FIG5 is a second structural diagram of a device for determining a power offset parameter according to an embodiment of the present application;

[0032] FIG6 is a communication device provided in an embodiment of the present application;

[0033] FIG7 is a schematic diagram of the hardware structure of a terminal implementing an embodiment of the present application;

[0034] FIG8 is a network side device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0035] The following will be combined with the accompanying drawings in the embodiments of this application to clearly describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0036] The terms "first", "second", etc. in this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same type, and do not limit the number of objects, for example, the first object can be one or more. In addition, "or" in this application represents at least one of the connected objects. For example, "A or B" covers three options, namely, Option 1: including A but not including B; Option 2: including B but not including A; Option 3: including both A and B. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0037] The term "indication" in this application can be either a direct indication (or explicit indication) or an indirect indication (or implicit indication). A direct indication can be understood as the sender explicitly informing the receiver of specific information, the operation to be performed, or the requested result, etc. in the instruction sent; an indirect indication can be understood as the receiver determining the corresponding information based on the instruction sent by the sender, or making a judgment and determining the operation to be performed or the requested result, etc. based on the judgment result.

[0038] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in 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) or other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the technology described can be used for the systems and radio technologies mentioned above, as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and NR terminology is used in most of the following description, but these technologies can also be applied to systems other than NR systems, such as 6th generation (6G) systems. th Generation, 6G) communication system.

[0039] FIG1 is a block diagram of a wireless communication system applicable to an embodiment of the present application. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 may be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), a notebook computer, a personal digital assistant (PDA), a handheld computer, a netbook, an ultra-mobile personal computer (UMPC), a mobile internet device (MID), an augmented reality (AR), a virtual reality (VR) device, a robot, a wearable device (Wearable Device), an aircraft (Flight Vehicle), a vehicle-mounted device (VUE), a ship-mounted device, a pedestrian user equipment (PUE), a smart home (home appliances with wireless communication capabilities, such as refrigerators, televisions, washing machines, or furniture), a game console, a personal computer (PC), an ATM, or a self-service machine, or other terminal-side devices. Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle-mounted device can also be called a vehicle-mounted terminal, a vehicle-mounted controller, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip or a vehicle-mounted unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 may include an access network device or a core network device, wherein the access network device may also be called a radio access network (Radio Access Network, RAN) device, a radio access network function or a radio access network unit. The access network device may include a base station, a wireless local area network (WLAN) access point (AP) or a wireless fidelity (WiFi) node, etc.Among them, the base station can be referred to as Node B (NB), Evolved Node B (eNB), the next generation Node B (gNB), New Radio Node B (NR Node B), access point, Relay Base Station (RBS), Serving Base Station (SBS), Base Transceiver Station (BTS), radio base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), Home Node B (HNB), Home Evolved Node B (home evolved Node B), Transmission Reception Point (TRP) or other appropriate terms in the field. As long as the same technical effect is achieved, the base station is not limited to specific technical vocabulary. It should be noted that in the embodiment of the present application, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited.

[0040] In order to facilitate a clearer understanding of the technical solutions provided by the embodiments of the present application, some relevant knowledge is first introduced as follows.

[0041] 1. Cell-free massive multiple-input multiple-output (MIMO) system.

[0042] Cell-Free Massive MIMO systems can be considered a deconstruction of traditional Massive MIMO systems. In traditional Massive MIMO systems, antennas are concentrated at a single site (base station), and UEs are distributed around the base station in cells. In Massive MIMO systems, each base station deploys a large number of antennas. This provides higher array gain and spatial resolution. Multiple UEs can be served simultaneously using the same time and frequency resources, delivering high throughput, high reliability, and high energy efficiency. Cell-Free Massive MIMO systems eliminate the concept of cells. Instead, a large number of antennas are distributed over a wide area, and UEs are similarly distributed over this wide area. These antennas are called TRPs or access points (APs). In theory, each UE can communicate with every TRP. Leveraging the fronthaul network and the central processing unit (CPU), a large number of geographically dispersed TRPs can collectively serve a smaller number of UEs. The CPU utilizes channel statistics for joint detection. Cell-Free Massive MIMO networks are expected to be applicable in next-generation indoor and hotspot coverage scenarios, such as smart factories, train stations, shopping malls, stadiums, subways, hospitals, community centers, and university campuses.

[0043] In practical applications, the Cell-free network in a hotspot area can be viewed as a super cell containing multiple TRPs, where multiple TRPs use the same cell ID. Based on the synchronization accuracy and connection relationship between these TRPs, multiple TRPs with high synchronization accuracy can achieve collaborative transmission.

[0044] 2. CSI-RS and PDSCH power determination:

[0045] First, by reading the system information block (SIB) 1, the cell synchronization signal transmission power ss-PBCH-BlockPower is obtained in ServingCellConfigCommonSIB.

[0046] The NZP-CSI-RS-Resource IE contains the following two parameters:

[0047] 1) powerControlOffset: refers to the power offset of PDSCH RE relative to NZP CSI-RS RE, with a value range of [-8, 15] dB and a step size of 1 dB.

[0048] 2) powerControlOffsetSS: refers to the power offset of NZP CSI-RS RE relative to SSB RE, with a value range of {-3, 0, 3, 6} dB.

[0049] The UE can obtain the CSI-RS power and PDSCH power based on the synchronization signal block (SSB) power and the two parameters powerControlOffsetSS and powerControlOffset, where:

[0050] CSI-RS power is: ss-PBCH-BlockPower+powerControlOffsetSS;

[0051] PDSCH power is: ss-PBCH-BlockPower+powerControlOffsetSS+powerControlOffset.

[0052] 3. CQI selection

[0053] The CQI reflects the downlink channel quality and serves as the basis for downlink scheduling. The main process involves: the UE measures the CSI-RS to obtain the CQI, which is then reported by the base station (BS). The BS then uses the CQI information to select the appropriate modulation order, code rate, downlink data block size, and other factors to ensure optimal PDSCH downlink performance for the UE in various wireless environments.

[0054] The CQI is measured and reported by the UE. Existing protocols don't define how to measure CQI, but rather the selection criteria for it—the CQI value used to ensure the PDSCH decoding block error rate (BLER) is less than 10%. In other words, the UE evaluates downlink characteristics based on measurement results, such as the Signal-to-Interference-Noise Ratio (SINR), and uses an internal algorithm to determine the achievable BLER under these SINR conditions. It then reports the corresponding CQI value, subject to the BLER<10% limit.

[0055] 4. CSI reporting for Coherent Joint Transmission (CJT).

[0056] Rel-18 further extends the codebook of CJT of multiple TRPs based on the Type II enhanced codebook of Rel-16 and the port selection Type II enhanced codebook of Rel-17. The Type II enhanced codebook of Rel-16 includes spatial domain (SD) compression and frequency domain (FD) compression information. The orthogonal basis of spatial domain and frequency domain compression generally adopts Discrete Fourier Transform (DFT) vectors. Due to the spatial sparsity and frequency domain correlation of the channel, the main energy is concentrated on fewer orthogonal bases after orthogonal transformation. Compression is achieved when the number of spatial domain orthogonal bases and the number of frequency domain orthogonal bases fed back are much smaller than their respective complete orthogonal bases. The generated precoding matrix can be written as Where W1 is the L spatial compression vector matrix selected according to the channel spatial characteristics, W f are the M frequency domain compression vector matrices selected according to the frequency domain characteristics of the channel, is the compression coefficient matrix corresponding to the spatial and frequency domain compression vectors. Each element is a complex number, quantizing the amplitude and phase, respectively. In the Rel-16 Type II enhanced codebook, the two polarization directions of multiple layers share the same spatial orthogonal basis, while the frequency domain orthogonal basis is independently selected for each layer.

[0057] In CJT CSI feedback, to distinguish CSI-RS from different TRPs, the network can configure N (N is an integer between 1 and 4) CSI-RS resources within a CSI-RS resource set to correspond to different TRPs. The network can configure whether the UE must feedback CJT CSI corresponding to N TRPs. When the UE is configured to select M ≤ N TRPs from N TRPs, the CSI report uses an N-bit bitmap to report which M CSI-RS resources the feedback CJT CSI corresponds to.

[0058] Since the spatial and frequency compression characteristics of different TRP channels are different, the above-mentioned Rel-16 Type II enhanced codebook and Rel-17 port selection Type II enhanced codebook can be constructed in each TRP, and then synthesized into a complete CJT codebook for multiple TRPs for feedback. The network can be configured in two modes:

[0059] Mode 1: The spatial domain orthogonal basis and frequency domain orthogonal basis of each TRP are independently selected and fed back, which can be expressed as:

[0060] Mode 2: The spatial domain orthogonal basis of each TRP is independently selected and fed back. The frequency domain orthogonal basis shared by each TRP is selected and fed back. It can be expressed as:

[0061] Where W1,N is L selected according to the channel spatial characteristics of TRP n n A spatial compression vector matrix, W f,N is M selected according to the channel frequency domain characteristics of TRP n n A frequency domain compressed vector matrix, W f are the M frequency domain compression vector matrices selected based on the channel frequency domain characteristics of N TRPs, It is the compression coefficient matrix corresponding to the spatial domain compression vector and frequency domain compression vector of TRP n.

[0062] In the current CJT CSI feedback scheme, the UE can select M≤N TRPs according to the implementation and report the CSI information of these M TRPs during CJT transmission. In this case, the number and composition of TRPs in the CJT TRP collaboration cluster are dynamically variable. For example, when N=4, the UE can select 2, 3, or 4 TRPs for CJT and report the CSI information of the corresponding TRP collaboration cluster. Among them, the CSI-RS is sent by each TRP separately, and the PDSCH signal is sent in collaboration with multiple TRPs. The UE needs to perform CJT transmission based on M TRPs according to the CSI-RS measurement results and the power offset (power offset between PDSCH and CSI-RS) configured by the network, calculate the CQI of the PDSCH signal transmission, and feedback it to the network.

[0063] However, when the TRP collaboration cluster (based on UE selection) changes dynamically, the network-side equipment cannot know the composition of the TRP cluster in advance and configure the corresponding power offset parameters. In the current protocol, the power offset configured for any number and composition of TRP collaboration clusters is the same. However, when the TRP collaboration cluster changes dynamically (for example, when the number of collaborative TRPs changes), the power offsets of PDSCH and CSI-RS may be different. This will cause the CQI calculated and fed back by the UE to differ from the actual CQI during PDSCH transmission, making it impossible to achieve accurate CQI control.

[0064] In order to solve the above problem, in an embodiment of the present application, when performing data transmission such as CJT transmission, the base station pre-configures a power offset for each possible TRP group (also known as a TRP collaboration cluster) to solve the CSI mismatch problem caused by the dynamic changes of the TRP collaboration cluster of data transmission.

[0065] For example, the network side device configures different power offsets for TRP collaboration clusters including 2, 3 or 4 TRPs. The UE determines the corresponding power offset based on the selected number of TRPs, and then calculates the CQI based on the power offset and feeds it back to the network side device, so that the network side device can obtain an accurate CQI estimate value for PDSCH transmission.

[0066] The following describes in detail the method for determining the power offset parameter provided in the embodiment of the present application through some embodiments and application scenarios in conjunction with the accompanying drawings.

[0067] FIG2 is a flow chart of a method for determining a power offset parameter according to an embodiment of the present application. As shown in FIG2 , the method includes steps 201 and 202; wherein:

[0068] Step 201: The terminal obtains first information.

[0069] It should be noted that the embodiments of the present application can be applied to scenarios where a terminal selects at least one TRP for data transmission. It is understandable that the coherent collaborative data transmission performed by a terminal selecting two or more TRPs (also known as TRP collaboration clusters or TRP groups) can be referred to as CJT transmission (Coherent Joint Transmission). The terminal includes but is not limited to the types of terminals 11 listed above, and the network-side devices include but are not limited to the types of network-side devices 12 listed above.

[0070] In the embodiments of the present application, there are multiple ways for the terminal to obtain the first information. For example, the terminal may receive the first information sent by the network-side device; for example, the first information is predefined by the protocol or preconfigured by the terminal. When the terminal selects at least one TRP for data transmission, the terminal may directly obtain the first information.

[0071] Step 202. The terminal determines a power bias parameter based on the first information; the power bias parameter is used to indicate the power offset between the physical downlink shared channel PDSCH signal and the channel state information reference signal CSI-RS, and the first information is used to indicate the association relationship between at least one transmission receiving point TRP of the network side device and the power bias parameter.

[0072] In the embodiment of the present application, TRP collaboration clusters with different numbers of TRPs (a single TRP when the number of TRPs is 1) each correspond to a power bias parameter.

[0073] For example, when the terminal selects a single TRP for data transmission, the power offset parameter corresponding to the TRP is △1; when the terminal selects a TRP collaboration cluster including 3 TRPs for data transmission, the power offset parameter corresponding to the TRP collaboration cluster is △2.

[0074] In the method for determining the power bias parameter provided in an embodiment of the present application, the terminal determines the power bias parameter based on the acquired first information; wherein the first information is used to indicate the association relationship between at least one TRP of the network side device and the power bias parameter, and the power bias parameter is used to indicate the power offset between the PDSCH signal and the CSI-RS; in the above method, the terminal pre-acquires the association relationship between each possible TRP collaboration cluster under different TRP numbers and the power bias parameter corresponding to the TRP collaboration cluster, so that when the terminal selects the TRP collaboration cluster for data transmission according to the implementation, it can determine the accurate power bias parameter according to the association relationship between the selected TRP collaboration cluster and the power bias parameter.

[0075] Optionally, the terminal calculates and reports the CQI of at least one selected TRP for PDSCH transmission based on the determined power bias parameter.

[0076] In an embodiment of the present application, the terminal calculates and reports the actual CQI of the selected TRP collaborative cluster for PDSCH transmission based on the determined accurate power bias parameters, thereby solving the problem of mismatch between the CQI reported by the terminal and the actual CQI during PDSCH transmission.

[0077] Optionally, the first information includes at least one of the following:

[0078] a) a first mapping relationship, used to indicate a mapping relationship between first TRP related information corresponding to the at least one TRP and the power bias parameter.

[0079] Optionally, the first TRP-related information includes at least one of the following:

[0080] [a] Number of TRPs.

[0081] For example, the first mapping relationship is: the power bias parameter corresponding to 1 TRP is △1; the power bias parameter corresponding to the TRP collaboration cluster including 3 TRPs is △2; the power bias parameter corresponding to the TRP collaboration cluster including 5 TRPs is △3.

[0082] [b] The number of downlink reference signal resources. Each TRP corresponds to one downlink reference signal resource.

[0083] Specifically, downlink reference signal resources are, for example, CSI-RS resources and Positioning Reference Signal (PRS) resources. The following embodiments are all further described by taking the downlink reference signal being CSI-RS as an example.

[0084] In an embodiment of the present application, the first mapping relationship is, for example: the power offset parameter corresponding to one CSI-RS resource is △1; the power offset parameter corresponding to a CSI-RS resource set including three CSI-RS resources is △2; and the power offset parameter corresponding to a CSI-RS resource combination including five CSI-RS resources is △3.

[0085] [c], at least one of a TRP index, a TRP index set and a TRP group index; the TRP index is used to identify the downlink reference signal resources corresponding to the TRP, the TRP index set includes at least two TRP indices, and the TRP group index is used to identify the downlink reference signal resources corresponding to all TRPs in the TRP group.

[0086] For example, if the TRP index corresponding to TRP[A] is 1, the first mapping relationship can be expressed as follows: the power offset parameter corresponding to TRP index=1 is △4; that is, the power offset parameter corresponding to the CSI-RS resource corresponding to TRP[A] is △4.

[0087] For another example, a TRP index set includes TRP indices corresponding to 2 TRPs: TRP index = 1 corresponding to TRP[A] and TRP index = 2 corresponding to TRP[B]; then the first mapping relationship is: the power bias parameter corresponding to TRP index = 1 is △4, and the power bias parameter corresponding to TRP index = 2 is △5; that is, the power bias parameter corresponding to the CSI-RS resource corresponding to TRP[A] is △4, and the power bias parameter corresponding to the CSI-RS resource corresponding to TRP[B] is △5.

[0088] For another example, a TRP group includes 5 TRPs: TRP[A]-TRP[E], and the TRP group index corresponding to the TRP group is 3; then the first mapping relationship is: the power bias parameter corresponding to TRP group index=3 is △6; that is, the power bias parameter corresponding to the CSI-RS resource corresponding to TRP[A]-TRP[E] is △6.

[0089] [d], at least one of a downlink reference signal resource index and a downlink reference signal resource index set; the downlink reference signal resource index is used to identify the downlink reference signal resource, and the downlink reference signal resource index set includes at least two of the downlink reference signal resource indices.

[0090] For example, if the CSI-RS resource index is 1, the first mapping relationship is: the power offset parameter corresponding to the CSI-RS resource index is △7. It should be noted that one CSI-RS resource corresponds to one TRP; if the CSI-RS resource index of CSI-RS resource [A] is 1, and the TRP corresponding to CSI-RS resource [A] is TRP[A], then the first mapping relationship can be understood as: the power offset parameter corresponding to TRP[A] is △7.

[0091] In summary, in the above-mentioned first TRP related information, the CSI-RS resource may be indicated by at least one of the following:

[0092] 1) CSI-RS resource identifier or index; 2) TRP identifier or index; 3) TRP group identifier or index, indicating the CSI-RS resources corresponding to all TRPs in the TRP group.

[0093] b) A first rule, wherein the first rule is a rule for determining the power bias parameter based on the number of TRPs or the change in the number of TRPs.

[0094] The first rule is obtained through at least one of the following: network side device indication, protocol pre-definition and pre-configuration.

[0095] Optionally, the first rule includes at least one of the following:

[0096] a) A functional relationship between the number of TRPs and the power bias parameter.

[0097] Specifically, the functional relationship between the TRP number and the power bias parameter can also be called a closed-form expression of the power bias parameter in terms of the TRP number.

[0098] For example, the protocol may predefine a power offset Δ=f(M), where Δ represents a power offset parameter, i.e., the power offset between the PDSCH signal and the CSI-RS, M represents the number of TRPs used for data transmission, and f(·) represents a functional relationship between the power offset parameter and M.

[0099] In actual applications, when the terminal selects the number M of TRPs (M≤N) for data transmission, the power offset parameters corresponding to the M number of TRPs can be calculated based on the above functional relationship.

[0100] b) a change in the power bias parameter, wherein the change in the power bias parameter is associated with a change in the number of TRPs.

[0101] The embodiment in which the first information includes the first mapping relationship is further described below.

[0102] Optionally, the terminal determines the power offset parameter based on the first information, which can be specifically implemented by following steps 1) to 2):

[0103] Step 1), the terminal obtains information related to the target first TRP; the information related to the target first TRP is information related to the first TRP corresponding to the TRP used to perform data transmission;

[0104] Step 2) The terminal determines the power bias parameter based on the target first TRP related information and the first mapping relationship.

[0105] Specifically, the network-side device pre-configures a first mapping relationship for the CSI-RS resources corresponding to each TRP. It should be noted that the CSI-RS resources corresponding to each TRP constitute one or more CSI-RS resource groups, and a CSI-RS resource group includes one or more CSI-RS resource sets; wherein, a CSI-RS resource set includes one or more CSI-RS resources in a CSI-RS resource group.

[0106] For example, a CSI-RS resource group includes N CSI-RS resources, which are represented as CSI-RS {#1, #1, ..., #N} respectively; then the first mapping relationship can be expressed as a mapping relationship between the number of CSI-RS resources in the CSI-RS resource set and the power offset parameter, which can be specifically represented by Table 1:

[0107] Table 1

[0108] The terminal first obtains the target first TRP related information corresponding to the TRP used to perform data transmission; the target first TRP related information is, for example, the number of TRPs or the number of CSI-RS resources.

[0109] If the number of TRPs or the number of CSI-RS resources is 2, the terminal determines that the power offset parameter is Δ2 based on the above-mentioned first mapping relationship.

[0110] For another example, a CSI-RS resource group includes N CSI-RS resources, respectively represented as CSI-RS {#1, #1, ..., #N}, then the first mapping relationship can be expressed as a mapping relationship between any CSI-RS resource set and a power offset parameter, which can be specifically represented by Table 2:

[0111] Table 2

[0112] The terminal first obtains the target first TRP related information corresponding to the TRP used to perform data transmission; the target first TRP related information is, for example, a TRP index or a TRP index set.

[0113] If the TRP index set includes #1, #2, #3, and #4, the terminal determines the power bias parameter to be △1 based on the above-mentioned first mapping relationship; if the TRP index set includes #1 and #4, the terminal determines the power bias parameter to be △8 based on the above-mentioned first mapping relationship.

[0114] In practical applications, the power bias parameter △1△ in Table 2 above 15 They may be partially identical, entirely identical, or entirely different.

[0115] Optionally, the first information of different CSI-RS resource groups may be configured uniformly or individually.

[0116] For example, when different CSI-RS resource groups select the same CSI-RS resource number M, the corresponding power offset parameters can be uniformly configured to the same △ M Or within CSI-RS resource group #i, when the number of CSI-RS resources is M, the power offset parameter is configured separately as Δ i M .

[0117] Optionally, after the terminal obtains the first mapping relationship and determines the power offset parameter corresponding to the TRP for data transmission based on the first mapping relationship, the terminal can calculate the CSI when receiving the PDSCH signal based on the power offset parameter; specifically, it can be implemented by following the steps 1)-2):

[0118] Step 1), the terminal receives a downlink reference signal sent by the network side device;

[0119] Step 2): The terminal calculates first channel state information CSI when receiving the PDSCH signal based on the measurement result of the downlink reference signal and the power offset parameter.

[0120] In an embodiment of the present application, after the terminal receives the first mapping relationship, if the terminal selects M≤N TRPs to report the first CSI of these M TRPs during data transmission, then the terminal determines the power offset parameter between the PDSCH signal and the CSI-RS signal through the first mapping relationship based on the selected M TRPs. Based on the power offset parameter, the first CSI when receiving the PDSCH signal during data transmission using the M TRPs can be calculated, including CQI, precoding matrix indicator (PMI), rank indicator (RI), etc., and the first CSI is fed back to the network side device.

[0121] In the above implementation, the terminal calculates and reports the actual CQI of the selected TRP collaboration cluster for PDSCH transmission based on the determined accurate power bias parameter, thereby solving the problem of mismatch between the CQI reported by the terminal and the actual CQI during PDSCH transmission.

[0122] Optionally, the terminal sends second information to the network side device; the second information includes at least one item of the first CSI and the target first TRP related information.

[0123] In an embodiment of the present application, in addition to reporting the first CSI, the terminal also needs to report the relevant parameters used by the terminal to calculate the first CSI to the network side device. Among them, the relevant parameters used by the terminal to calculate the first CSI refer to the target first TRP related information. In other words, the first TRP related information corresponding to the TRP used for data transmission needs to be reported to the network side device. Among them, the target first TRP related information includes at least one of the following:

[0124] TRP quantity;

[0125] The number of downlink reference signal resources;

[0126] At least one of TRP index, TRP index set, and TRP group index;

[0127] At least one of a downlink reference signal resource index and a downlink reference signal resource index set.

[0128] The following further describes an embodiment in which the first information includes the first rule.

[0129] Optionally, the terminal determines the power offset parameter based on the first information, which can be specifically implemented by following steps 1) to 2):

[0130] Step 1), the terminal obtains second TRP related information corresponding to the TRP used to perform data transmission; the second TRP related information includes at least one of the number of TRPs and the change in the number of TRPs;

[0131] Step 2) The terminal determines the power bias parameter based on the second TRP related information and the first rule.

[0132] Specifically, the terminal may determine the power bias parameter based on the number of TRPs and the first rule.

[0133] For example, when the terminal selects M (M≤N) number of TRPs for data transmission, the power bias parameters corresponding to the M number of TRPs can be obtained based on the functional relationship between the number of TRPs and the power bias parameters predefined in the protocol.

[0134] Optionally, the terminal may also determine the power offset parameter based on the change in the number of TRPs and the first rule; this may be achieved by following steps 1) to 2):

[0135] Step 1), the terminal determines a change in the power offset parameter based on a change in the number of TRPs;

[0136] Step 2): The terminal determines the power offset parameter based on the change in the power offset parameter and a preset initial power offset parameter.

[0137] For example, the network-side device may indicate the same initial power offset parameter Δ on the N CSI-RS resources included in the CSI-RS resource group, and predefine the following first rule in the protocol:

[0138] When performing data transmission (e.g., CJT transmission), the power bias parameter increases by δ for each additional TRP in the coordinated transmission; and decreases by δ for each decrease in the TRP in the coordinated transmission. δ is indicated by the network device or predefined by the protocol.

[0139] That is to say, the power offset parameter △ during PDSCH transmission M It can be expressed as: ΔM=Δ+(M-1)·δ, wherein Δ represents a preset initial power bias parameter and (M-1)·δ represents a change in the power bias parameter.

[0140] Optionally, after the terminal obtains the first rule and determines the power offset parameter corresponding to the TRP for data transmission based on the first rule, the terminal can calculate the CSI when receiving the PDSCH signal based on the power offset parameter; specifically, it can be implemented by following the steps 1)-2):

[0141] Step 1), the terminal receives a downlink reference signal sent by the network side device;

[0142] Step 2): The terminal calculates the second CSI when receiving the PDSCH signal based on the measurement result of the downlink reference signal and the power offset parameter.

[0143] In this embodiment of the present application, after obtaining the first rule, if the terminal selects M≤N TRPs to report the second CSI of these M TRPs during data transmission, then the terminal determines the power offset parameter between the PDSCH signal and the CSI-RS signal according to the first rule based on the selected M TRPs. Based on the power offset parameter, the second CSI, including CQI, PMI, RI, etc., when receiving the PDSCH signal during data transmission using the M TRPs can be calculated, and the second CSI is fed back to the network side device.

[0144] In the above implementation, the terminal calculates and reports the actual CQI of the selected TRP collaboration cluster for PDSCH transmission based on the determined accurate power bias parameter, thereby solving the problem of mismatch between the CQI reported by the terminal and the actual CQI during PDSCH transmission.

[0145] Optionally, the terminal sends third information to the network side device; the third information includes at least one item of the second CSI and the second TRP related information.

[0146] In an embodiment of the present application, in addition to reporting the second CSI, the terminal also needs to report the relevant parameters used by the terminal to calculate the second CSI to the network side device. Among them, the relevant parameters used by the terminal to calculate the second CSI refer to the second TRP related information. In other words, the second TRP related information corresponding to the TRP used for data transmission needs to be reported to the network side device; the second TRP related information includes at least one of the number of TRPs and the change in the number of TRPs.

[0147] FIG3 is a second flow chart of a method for determining a power offset parameter according to an embodiment of the present application. As shown in FIG3 , the method includes step 301; wherein:

[0148] Step 301. The network side device sends first information to the terminal; the power offset parameter is used to indicate the power offset between the physical downlink shared channel PDSCH signal and the channel state information reference signal CSI-RS, and the first information is used to indicate the association relationship between at least one transmission receiving point TRP of the network side device and the power offset parameter.

[0149] It should be noted that the embodiments of the present application can be applied to scenarios where a terminal selects at least one TRP for data transmission. It is understood that data transmission performed by a terminal selecting two or more TRPs (also known as a TRP collaboration cluster or TRP group) can be referred to as CJT transmission. The terminal includes but is not limited to the types of terminals 11 listed above, and the network-side devices include but are not limited to the types of network-side devices 12 listed above.

[0150] Optionally, the network side device configures the first information for the downlink reference signal resources corresponding to the at least one TRP.

[0151] Each TRP corresponds to a downlink reference signal resource, and the downlink reference signal resource corresponding to at least one TRP may be, for example, a CSI-RS resource group or a single CSI-RS resource.

[0152] In the method for determining the power bias parameter provided in an embodiment of the present application, the network side device sends a first information to the terminal, so that the terminal determines the power bias parameter based on the acquired first information; wherein, the first information is used to indicate the association relationship between at least one TRP of the network side device and the power bias parameter, and the power bias parameter is used to indicate the power offset between the PDSCH signal and the CSI-RS; in the above method, the network side device sends the first information to the terminal, so that the terminal pre-acquires the association relationship between each possible TRP collaboration cluster under different TRP numbers and the power bias parameter corresponding to the TRP collaboration cluster, so that when the terminal selects the TRP collaboration cluster for data transmission according to the implementation, it can determine the accurate power bias parameter according to the association relationship between the selected TRP collaboration cluster and the power bias parameter, and then can calculate and report the actual CQI when the TRP collaboration cluster is selected for PDSCH transmission based on the power bias parameter, thereby solving the problem of mismatch between the CQI reported by the terminal and the actual CQI during PDSCH transmission.

[0153] Optionally, the first information includes at least one of the following:

[0154] a) a first mapping relationship, used to indicate a mapping relationship between first TRP related information corresponding to the at least one TRP and the power offset parameter;

[0155] b) A first rule, wherein the first rule is a rule for determining the power bias parameter based on the number of TRPs or the change in the number of TRPs.

[0156] Optionally, the first TRP-related information includes at least one of the following:

[0157] a) Number of TRPs;

[0158] b) The number of downlink reference signal resources. Each TRP corresponds to one downlink reference signal resource.

[0159] c) at least one of a TRP index, a TRP index set, and a TRP group index; the TRP index is used to identify the downlink reference signal resource corresponding to the TRP, the TRP index set includes at least two TRP indices, and the TRP group index is used to identify the downlink reference signal resources corresponding to all TRPs in the TRP group;

[0160] d) at least one of a downlink reference signal resource index and a downlink reference signal resource index set; the downlink reference signal resource index is used to identify the downlink reference signal resource, and the downlink reference signal resource index set includes at least two downlink reference signal resource indices.

[0161] Optionally, the first rule includes at least one of the following:

[0162] a functional relationship between the number of TRPs and the power bias parameter;

[0163] The change in the power bias parameter is associated with the change in the number of TRPs.

[0164] Optionally, the network-side device may further perform the following steps:

[0165] The network side device receives the second information sent by the terminal; the second information includes at least one item of the first channel state information CSI and target first TRP related information when the network side device sends the PDSCH signal to the terminal, the first CSI includes a channel quality indication CQI, and the target first TRP related information is the first TRP related information corresponding to the TRP used to perform data transmission.

[0166] Optionally, the network-side device may further perform the following steps:

[0167] The network side device receives the third information sent by the terminal; the third information includes at least one of the second CSI and second TRP related information when the network side device sends the PDSCH signal to the terminal, the second CSI includes CQI, and the second TRP related information includes at least one of the TRP number and the TRP number change.

[0168] The power offset parameter determination method provided in the embodiment of the present application can be performed by a power offset parameter determination device. In the embodiment of the present application, the power offset parameter determination method performed by the power offset parameter determination device is used as an example to illustrate the power offset parameter determination device provided in the embodiment of the present application.

[0169] FIG4 is a schematic diagram of a structure of a device for determining a power offset parameter according to an embodiment of the present application. As shown in FIG4 , the device 400 for determining a power offset parameter, applied to a terminal, includes:

[0170] An acquisition module 401 is configured to acquire first information;

[0171] Determination module 402 is used to determine a power bias parameter based on the first information; the power bias parameter is used to indicate the power offset between the physical downlink shared channel PDSCH signal and the channel state information reference signal CSI-RS, and the first information is used to indicate the association relationship between at least one transmission receiving point TRP of the network side device and the power bias parameter.

[0172] In the power bias parameter determination device provided in an embodiment of the present application, the power bias parameter is determined based on the acquired first information; wherein the first information is used to indicate the association relationship between at least one TRP of the network side device and the power bias parameter, and the power bias parameter is used to indicate the power offset between the PDSCH signal and the CSI-RS; in the above-mentioned device, by pre-acquiring the association relationship between each possible TRP collaboration cluster under different TRP numbers and the power bias parameter corresponding to the TRP collaboration cluster, the terminal can determine the accurate power bias parameter according to the association relationship between the selected TRP collaboration cluster and the power bias parameter when selecting the TRP collaboration cluster for data transmission according to the implementation.

[0173] Optionally, the first information includes at least one of the following:

[0174] A first mapping relationship, used to indicate a mapping relationship between first TRP related information corresponding to the at least one TRP and the power offset parameter;

[0175] The first rule is a rule for determining the power bias parameter based on the number of TRPs or the change in the number of TRPs.

[0176] Optionally, the first TRP-related information includes at least one of the following:

[0177] TRP quantity;

[0178] The number of downlink reference signal resources. Each TRP corresponds to one downlink reference signal resource.

[0179] At least one of a TRP index, a TRP index set, and a TRP group index; the TRP index is used to identify the downlink reference signal resource corresponding to the TRP, the TRP index set includes at least two TRP indices, and the TRP group index is used to identify the downlink reference signal resources corresponding to all TRPs in the TRP group;

[0180] At least one of a downlink reference signal resource index and a downlink reference signal resource index set; the downlink reference signal resource index is used to identify the downlink reference signal resource, and the downlink reference signal resource index set includes at least two downlink reference signal resource indices.

[0181] Optionally, the determining module 402 is further configured to:

[0182] Acquire relevant information of a target first TRP; the relevant information of the target first TRP is relevant information of the first TRP corresponding to the TRP used to perform data transmission;

[0183] Determine the power bias parameter based on the target first TRP related information and the first mapping relationship.

[0184] Optionally, the device further comprises:

[0185] A first receiving module, configured to receive a downlink reference signal sent by the network side device;

[0186] The first calculation module is configured to calculate first channel state information CSI when receiving the PDSCH signal based on the measurement result of the downlink reference signal and the power offset parameter.

[0187] Optionally, the device further comprises:

[0188] The second sending module is used to send the second information to the network side device; the second information includes at least one item of the first CSI and the target first TRP related information.

[0189] Optionally, the first rule includes at least one of the following:

[0190] a functional relationship between the number of TRPs and the power bias parameter;

[0191] The change in the power bias parameter is associated with the change in the number of TRPs.

[0192] Optionally, the determining module 402 is further configured to:

[0193] Acquire second TRP related information corresponding to the TRP used to perform data transmission; the second TRP related information includes at least one of the number of TRPs and the change in the number of TRPs;

[0194] Determine the power bias parameter based on the second TRP related information and the first rule.

[0195] Optionally, the determining module 402 is further configured to:

[0196] Determining a change in the power bias parameter based on the change in the number of TRPs;

[0197] The power bias parameter is determined based on the change in the power bias parameter and a preset initial power bias parameter.

[0198] Optionally, the device further comprises:

[0199] A second receiving module, configured to receive a downlink reference signal sent by the network side device;

[0200] The second calculation module is configured to calculate a second CSI when receiving the PDSCH signal based on the measurement result of the downlink reference signal and the power offset parameter.

[0201] Optionally, the device further comprises:

[0202] The third sending module is used to send third information to the network side device; the third information includes at least one of the second CSI and the second TRP related information.

[0203] Optionally, the acquisition module 401 is further configured to:

[0204] Receive the first information from the network-side device.

[0205] FIG5 is a second structural diagram of a device for determining a power offset parameter according to an embodiment of the present application. As shown in FIG5 , the device 500 for determining a power offset parameter, applied to a network-side device, includes:

[0206] The first sending module 501 is used to send first information to the terminal; the power offset parameter is used to indicate the power offset between the physical downlink shared channel PDSCH signal and the channel state information reference signal CSI-RS, and the first information is used to indicate the association relationship between at least one transmission receiving point TRP of the network side device and the power offset parameter.

[0207] In the power bias parameter determination device provided in an embodiment of the present application, first information is sent to the terminal so that the terminal determines the power bias parameter based on the acquired first information; wherein the first information is used to indicate the association relationship between at least one TRP of the network side device and the power bias parameter, and the power bias parameter is used to indicate the power offset between the PDSCH signal and the CSI-RS; in the above method, the first information is sent to the terminal so that the terminal pre-acquires the association relationship between each possible TRP collaboration cluster under different TRP numbers and the power bias parameter corresponding to the TRP collaboration cluster, so that when the terminal selects the TRP collaboration cluster for data transmission according to the implementation, it can determine the accurate power bias parameter according to the association relationship between the selected TRP collaboration cluster and the power bias parameter.

[0208] Optionally, the first information includes at least one of the following:

[0209] A first mapping relationship, used to indicate a mapping relationship between first TRP related information corresponding to the at least one TRP and the power offset parameter;

[0210] The first rule is a rule for determining the power bias parameter based on the number of TRPs or the change in the number of TRPs.

[0211] Optionally, the first TRP-related information includes at least one of the following:

[0212] TRP quantity;

[0213] The number of downlink reference signal resources. Each TRP corresponds to one downlink reference signal resource.

[0214] At least one of a TRP index, a TRP index set, and a TRP group index; the TRP index is used to identify the downlink reference signal resource corresponding to the TRP, the TRP index set includes at least two TRP indices, and the TRP group index is used to identify the downlink reference signal resources corresponding to all TRPs in the TRP group;

[0215] At least one of a downlink reference signal resource index and a downlink reference signal resource index set; the downlink reference signal resource index is used to identify the downlink reference signal resource, and the downlink reference signal resource index set includes at least two downlink reference signal resource indices.

[0216] Optionally, the first rule includes at least one of the following:

[0217] a functional relationship between the number of TRPs and the power bias parameter;

[0218] The change in the power bias parameter is associated with the change in the number of TRPs.

[0219] Optionally, the device further comprises:

[0220] The third receiving module is used to receive the second information sent by the terminal; the second information includes at least one of the first channel state information CSI and target first TRP related information when the network side device sends the PDSCH signal to the terminal, and the target first TRP related information is the first TRP related information corresponding to the TRP used to perform data transmission.

[0221] Optionally, the device further comprises:

[0222] The fourth receiving module is used to receive the third information sent by the terminal; the third information includes at least one of the second CSI and second TRP related information when the network side device sends the PDSCH signal to the terminal, and the second TRP related information includes at least one of the TRP number and the TRP number change.

[0223] Optionally, the device further comprises:

[0224] A configuration module is used to configure the first information for the downlink reference signal resources corresponding to the at least one TRP.

[0225] The apparatus for determining the power bias parameter in the embodiments of the present application can be an electronic device, such as an electronic device with an operating system, or a component in the electronic device, such as an integrated circuit or chip. The electronic device can be a terminal or other device other than a terminal. For example, the terminal can include but is not limited to the types of terminal 11 listed above, and other devices can include servers, network attached storage (NAS), etc., which are not specifically limited in the embodiments of the present application.

[0226] The power bias parameter determination device provided in the embodiment of the present application can implement the various processes implemented in the method embodiments of Figures 2 to 3 and achieve the same technical effects. To avoid repetition, they will not be described here.

[0227] As shown in Figure 6, an embodiment of the present application further provides a communication device 600, including a processor 601 and a memory 602, wherein the memory 602 stores a program or instruction that can be run on the processor 601. For example, when the communication device 600 is a terminal, when the program or instruction is executed by the processor 601, each step of the embodiment of the method for determining the power offset parameter shown in Figure 2 is implemented, and the same technical effect can be achieved. When the communication device 600 is a network-side device, when the program or instruction is executed by the processor 601, each step of the embodiment of the method for determining the power offset parameter shown in Figure 3 is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0228] An embodiment of the present application further provides a terminal, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to execute a program or instruction to implement the steps in the embodiment of the method for determining a power bias parameter as shown in FIG2 . This terminal embodiment corresponds to the aforementioned terminal-side method embodiment, and each implementation process and implementation method of the aforementioned method embodiment are applicable to this terminal embodiment and can achieve the same technical effects. Specifically, FIG7 is a schematic diagram of the hardware structure of a terminal implementing an embodiment of the present application.

[0229] The terminal 700 includes but is not limited to: a radio frequency unit 701, a network module 702, an audio output unit 703, an input unit 704, a sensor 705, a display unit 706, a user input unit 707, an interface unit 708, a memory 709 and at least some of the components of the processor 710.

[0230] Those skilled in the art will appreciate that the terminal 700 may also include a power supply (such as a battery) to power various components. The power supply may be logically connected to the processor 710 via a power management system, thereby enabling the power management system to manage charging, discharging, and power consumption. The terminal structure shown in FIG7 does not limit the terminal. The terminal may include more or fewer components than shown, or may combine certain components, or have different component arrangements, which will not be described in detail here.

[0231] It should be understood that in an embodiment of the present application, the input unit 704 may include a graphics processing unit (GPU) 7041 and a microphone 7042, and the graphics processing unit 7041 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 706 may include a display panel 7061, and the display panel 7061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 707 includes a touch panel 7071 and at least one of other input devices 7072. The touch panel 7071 is also called a touch screen. The touch panel 7071 may include two parts: a touch detection device and a touch controller. Other input devices 7072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0232] In the embodiment of the present application, after receiving downlink data from a network-side device, the RF unit 701 may transmit the data to the processor 710 for processing. Furthermore, the RF unit 701 may send uplink data to the network-side device. Typically, the RF unit 701 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, and the like.

[0233] The memory 709 can be used to store software programs or instructions and various data. The memory 709 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, applications or instructions required for at least one function (such as a sound playback function, an image playback function, etc.). In addition, the memory 709 may include a volatile memory or a non-volatile memory. Among them, 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 a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDRSDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM), and a direct memory bus random access memory (DRRAM). The memory 709 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0234] Processor 710 may include one or more processing units. Optionally, processor 710 integrates an application processor and a modem processor. The application processor primarily handles operations related to the operating system, user interface, and application programs, while the modem processor primarily processes wireless communication signals, such as a baseband processor. It is understood that the modem processor may not be integrated into processor 710.

[0235] An embodiment of the present application further provides a network-side device, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to execute a program or instruction to implement the steps of the embodiment of the method for determining a power bias parameter as shown in FIG3 . This network-side device embodiment corresponds to the aforementioned network-side device method embodiment, and each implementation process and implementation method of the aforementioned method embodiment are applicable to this network-side device embodiment and can achieve the same technical effects.

[0236] Specifically, embodiments of the present application also provide a network-side device. As shown in Figure 8, the network-side device 800 includes an antenna 81, a radio frequency device 82, a baseband device 83, a processor 84, and a memory 85. Antenna 81 is connected to radio frequency device 82. In the uplink direction, radio frequency device 82 receives information via antenna 81 and sends the received information to baseband device 83 for processing. In the downlink direction, baseband device 83 processes the information to be transmitted and sends it to radio frequency device 82. Radio frequency device 82 processes the received information and then sends it through antenna 81.

[0237] The method executed by the network-side device in the above embodiment may be implemented in the baseband device 83 , which includes a baseband processor.

[0238] The baseband device 83 may include, for example, at least one baseband board, on which multiple chips are arranged, as shown in Figure 8, one of the chips is, for example, a baseband processor, which is connected to the memory 85 through a bus interface to call the program in the memory 85 to execute the network device operations shown in the above method embodiment.

[0239] The network side device may further include a network interface 86, which is, for example, a Common Public Radio Interface (CPRI).

[0240] Specifically, the network side device 800 of the embodiment of the present application also includes: instructions or programs stored in the memory 85 and executable on the processor 84. The processor 84 calls the instructions or programs in the memory 85 to execute the method for determining the power bias parameters shown in FIG3 and achieve the same technical effect. To avoid repetition, it will not be described here.

[0241] An embodiment of the present application further provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the various processes of the embodiment of the method for determining the power bias parameter described above are implemented, and the same technical effect can be achieved. To avoid repetition, they are not described here.

[0242] The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk. In some examples, the readable storage medium may be a non-transitory readable storage medium.

[0243] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned power bias parameter determination method embodiment, and can achieve the same technical effect. To avoid repetition, it is not repeated here.

[0244] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0245] An embodiment of the present application further provides a computer program / program product, which is stored in a storage medium and executed by at least one processor to implement the various processes of the above-mentioned embodiment of the method for determining the power bias parameter, and can achieve the same technical effect. To avoid repetition, it is not repeated here.

[0246] An embodiment of the present application also provides a system for determining a power bias parameter, including: a terminal and a network-side device, wherein the terminal can be used to execute the steps of the method for determining the power bias parameter shown in Figure 2 above, and the network-side device can be used to execute the steps of the method for determining the power bias parameter shown in Figure 3 above.

[0247] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0248] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of a computer software product plus a necessary general-purpose hardware platform, or of course, by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.) and includes a number of instructions for enabling a terminal or network-side device to execute the methods described in each embodiment of the present application.

[0249] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms of implementation methods without departing from the purpose of this application and the scope of protection of the claims. These implementation methods are all within the protection of this application.

Claims

1. A method for determining a power bias parameter, comprising: The terminal obtains first information; The terminal determines a power bias parameter based on the first information; the power bias parameter is used to indicate the power offset between a Physical Downlink Shared Channel (PDSCH) signal and a Channel State Information Reference Signal (CSI-RS), and the first information is used to indicate the association relationship between at least one Transmission and Reception Point (TRP) of the network side device and the power bias parameter.

2. The method for determining the power bias parameter according to claim 1, wherein, The first information includes at least one of the following: A first mapping relationship, which is used to indicate the mapping relationship between the first TRP-related information corresponding to the at least one TRP and the power bias parameter; A first rule, which is a rule for determining the power bias parameter based on the number of TRPs or the change amount of the number of TRPs.

3. The method for determining the power bias parameter according to claim 2, wherein, The first TRP-related information includes at least one of the following: The number of TRPs; The number of downlink reference signal resources, where each TRP corresponds to one downlink reference signal resource; At least one of a TRP index, a set of TRP indexes, and a TRP group index; the TRP index is used to identify the downlink reference signal resource corresponding to the TRP, the set of TRP indexes includes at least two of the TRP indexes, and the TRP group index is used to identify the downlink reference signal resources corresponding to all TRPs in the TRP group; At least one of a downlink reference signal resource index and a set of downlink reference signal resource indexes; the downlink reference signal resource index is used to identify the downlink reference signal resource, and the set of downlink reference signal resource indexes includes at least two of the downlink reference signal resource indexes.

4. The method for determining the power bias parameter according to claim 2 or 3, wherein The terminal determines a power bias parameter based on the first information, including: The terminal obtains target first TRP-related information; the target first TRP-related information is the first TRP-related information corresponding to the TRP used for data transmission; The terminal determines the power bias parameter based on the target first TRP-related information and the first mapping relationship.

5. The method for determining the power bias parameter according to claim 4, wherein, The method further includes: The terminal receives a downlink reference signal sent by the network side device; The terminal calculates a first Channel State Information (CSI) when receiving the PDSCH signal based on the measurement result of the downlink reference signal and the power bias parameter.

6. The method for determining the power bias parameter according to claim 5, wherein, The method further includes: The terminal sends second information to the network side device; the second information includes at least one of the first CSI and the target first TRP-related information.

7. The method for determining the power bias parameter according to claim 2, wherein, The first rule includes at least one of the following: The functional relationship between the number of TRPs and the power bias parameter; The change amount of the power bias parameter, where the change amount of the power bias parameter is associated with the change amount of the number of TRPs.

8. The method for determining the power bias parameter according to claim 7, wherein, The terminal determines a power bias parameter based on the first information, including: The terminal obtains second TRP-related information corresponding to the TRP used for data transmission; the second TRP-related information includes at least one of the number of TRPs and the change amount of the number of TRPs; The terminal determines the power bias parameter based on the second TRP-related information and the first rule.

9. The method for determining the power bias parameter according to claim 8, wherein, The terminal determines the power bias parameter based on the second TRP-related information and the first rule, including: The terminal determines the change amount of the power bias parameter based on the change amount of the number of TRPs; The terminal determines the power bias parameter based on the change amount of the power bias parameter and a preset initial power bias parameter.

10. The method for determining the power bias parameter according to claim 8 or 9, wherein, The method further includes: The terminal receives a downlink reference signal sent by the network-side device; The terminal calculates a second CSI when receiving the PDSCH signal based on the measurement result of the downlink reference signal and the power bias parameter.

11. The method for determining the power bias parameter according to claim 10, wherein, The method further includes: The terminal sends third information to the network-side device; the third information includes at least one of the second CSI and the second TRP-related information.

12. The method for determining a power bias parameter according to any one of claims 1 to 11, wherein, The terminal obtains first information, including: The terminal receives the first information from the network-side device.

13. A method for determining a power bias parameter, including: The network-side device sends first information to the terminal; The power bias parameter is used to indicate the power offset between a physical downlink shared channel PDSCH signal and a channel state information reference signal CSI-RS, and the first information is used to indicate the association relationship between at least one transmission and reception point TRP of the network-side device and the power bias parameter.

14. The method for determining the power bias parameter according to claim 13, wherein, The first information includes at least one of the following: A first mapping relationship, which is used to indicate the mapping relationship between the first TRP-related information corresponding to the at least one TRP and the power bias parameter; A first rule, where the first rule is a rule for determining the power bias parameter based on the number of TRPs or the change amount of the number of TRPs.

15. The method for determining the power bias parameter according to claim 14, wherein, The first TRP-related information includes at least one of the following: The number of TRPs; The number of downlink reference signal resources, where each TRP corresponds to one downlink reference signal resource; At least one of a TRP index, a set of TRP indexes, and a TRP group index; the TRP index is used to identify the downlink reference signal resource corresponding to the TRP, the set of TRP indexes includes at least two of the TRP indexes, and the TRP group index is used to identify the downlink reference signal resources corresponding to all TRPs in the TRP group; At least one of a downlink reference signal resource index and a set of downlink reference signal resource indexes; the downlink reference signal resource index is used to identify the downlink reference signal resource, and the set of downlink reference signal resource indexes includes at least two of the downlink reference signal resource indexes.

16. The method for determining the power bias parameter according to claim 14, wherein, The first rule includes at least one of the following: The functional relationship between the number of TRPs and the power bias parameter; The change amount of the power bias parameter, where the change amount of the power bias parameter is associated with the change amount of the number of TRPs.

17. The method for determining a power bias parameter according to claim 14 or 15, wherein, The method further includes: The network-side device receives second information sent by the terminal; the second information includes at least one of first channel state information CSI when the network-side device sends the PDSCH signal to the terminal and target first TRP-related information, and the target first TRP-related information is the first TRP-related information corresponding to the TRP used for data transmission.

18. The method for determining the power bias parameter according to claim 14 or 16, wherein, The method further includes: The network-side device receives third information sent by the terminal; the third information includes at least one of second CSI and second TRP-related information when the network-side device sends the PDSCH signal to the terminal, and the second TRP-related information includes at least one of the number of TRPs and the change amount of the number of TRPs.

19. The method for determining a power bias parameter according to any one of claims 13 to 18, wherein, The method further includes: The network-side device configures the first information for the downlink reference signal resources corresponding to the at least one TRP.

20. A device for determining a power bias parameter, including: An acquisition module, configured to acquire first information; A determination module, configured to determine a power bias parameter based on the first information; The power bias parameter is used to indicate the power offset between a physical downlink shared channel PDSCH signal and a channel state information reference signal CSI-RS, and the first information is used to indicate the association relationship between at least one transmission and reception point TRP of the network-side device and the power bias parameter.

21. The determining device for the power bias parameter according to claim 20, wherein, The first information includes at least one of the following: A first mapping relationship, configured to indicate the mapping relationship between the first TRP-related information corresponding to the at least one TRP and the power bias parameter; A first rule, and the first rule is a rule for determining the power bias parameter based on the number of TRPs or the change amount of the number of TRPs.

22. The determining device for power bias parameters according to claim 21, wherein, The first TRP-related information includes at least one of the following: The number of TRPs; The number of downlink reference signal resources, and each TRP corresponds to one downlink reference signal resource; At least one of a TRP index, a set of TRP indexes, and a TRP group index; the TRP index is used to identify the downlink reference signal resource corresponding to the TRP, the set of TRP indexes includes at least two of the TRP indexes, and the TRP group index is used to identify the downlink reference signal resources corresponding to all TRPs in the TRP group; At least one of a downlink reference signal resource index and a set of downlink reference signal resource indexes; the downlink reference signal resource index is used to identify the downlink reference signal resource, and the set of downlink reference signal resource indexes includes at least two of the downlink reference signal resource indexes.

23. The apparatus for determining a power bias parameter according to claim 21 or 22, wherein The determination module is further configured to: Acquire target first TRP-related information; the target first TRP-related information is the first TRP-related information corresponding to the TRP used for data transmission; Determine the power bias parameter based on the target first TRP-related information and the first mapping relationship.

24. The determining device for power bias parameters according to claim 21, wherein, The first rule includes at least one of the following: The functional relationship between the number of TRPs and the power bias parameter; The change amount of the power bias parameter, and the change amount of the power bias parameter is associated with the change amount of the number of TRPs.

25. The determining device for power bias parameters according to claim 24, wherein, The determining module is further configured to: Obtain second TRP-related information corresponding to a TRP for performing data transmission; the second TRP-related information includes at least one of the number of TRPs and the change amount of the number of TRPs; Determine the power bias parameter based on the second TRP-related information and the first rule.

26. An apparatus for determining a power bias parameter, comprising: A first sending module, configured to send first information to a terminal; The power bias parameter is used to indicate a power offset between a physical downlink shared channel PDSCH signal and a channel state information reference signal CSI-RS, and the first information is used to indicate an association relationship between at least one transmission and reception point TRP of a network-side device and the power bias parameter.

27. The determining device for power bias parameters according to claim 26, wherein, The first information includes at least one of the following: A first mapping relationship, configured to indicate a mapping relationship between first TRP-related information corresponding to the at least one TRP and the power bias parameter; A first rule, where the first rule is a rule for determining the power bias parameter based on the number of TRPs or the change amount of the number of TRPs.

28. The apparatus for determining a power bias parameter according to claim 27, wherein, The first TRP-related information includes at least one of the following: The number of TRPs; The number of downlink reference signal resources, where each TRP corresponds to one downlink reference signal resource; At least one of a TRP index, a TRP index set, and a TRP group index; the TRP index is used to identify the downlink reference signal resource corresponding to the TRP, the TRP index set includes at least two of the TRP indexes, and the TRP group index is used to identify the downlink reference signal resources corresponding to all TRPs in a TRP group; At least one of a downlink reference signal resource index and a downlink reference signal resource index set; the downlink reference signal resource index is used to identify the downlink reference signal resource, and the downlink reference signal resource index set includes at least two of the downlink reference signal resource indexes.

29. The determining device for power bias parameters according to claim 27, wherein, The first rule includes at least one of the following: A functional relationship between the number of TRPs and the power bias parameter; The change amount of the power bias parameter, where the change amount of the power bias parameter is associated with the change amount of the number of TRPs.

30. A terminal, comprising a processor and a memory, where the memory stores a program or instruction that can run on the processor, and when the program or instruction is executed by the processor, the steps of the method for determining a power bias parameter according to any one of claims 1 to 12 are implemented.

31. A network-side device, comprising a processor and a memory, where the memory stores a program or instruction that can run on the processor, and when the program or instruction is executed by the processor, the steps of the method for determining a power bias parameter according to any one of claims 13 to 19 are implemented.

32. A readable storage medium, where a program or instruction is stored on the readable storage medium, and when the program or instruction is executed by a processor, the method for determining a power bias parameter according to any one of claims 1 to 12 is implemented, or the steps of the method for determining a power bias parameter according to any one of claims 13 to 19 are implemented.

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