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

Abstract

The invention discloses a method and device for determining a power offset parameter, a terminal and network side equipment, and belongs to the technical field of communication, and the method for determining the power offset parameter comprises the steps that the terminal obtains first information; the terminal determines a power offset parameter based on the first information; the power offset parameter is 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 is used for indicating an association relationship between at least one transmission receiving point (TRP) of network side equipment and the power offset parameter.

Description

Technical Field

[0001] This application belongs to the field of communication technologies, and particularly relates to a method, apparatus, terminal, and network-side device for determining power offset parameters. Background Art

[0002] In a Cell free network, usually N transmit-receive points (TRPs) can be supported for data transmission to enhance transmission performance, where N≥1. The network-side device can configure whether the user equipment (UE) must feedback the channel state information (CSI) of coherent joint transmission (CJT) corresponding to N TRPs. In the case where the UE is configured to select any M (M≤N) TRPs from N TRPs to feedback CSI, the UE can select a TRP cooperation cluster for data transmission according to the implementation. The TRP cooperation cluster includes M (M≤N) TRPs, that is, corresponding to M channel state information reference signal (CSI-RS) resources, and reports the channel state information when the TRP cooperation cluster transmits data on the physical downlink shared channel (PDSCH), such as the channel quality indicator (CQI). Among them, the CQI is measured by the UE for the CSI-RS and calculated, and the network-side device controls the UE to report it. Then, the network-side device selects appropriate modulation order, code rate, downlink data block size, etc. according to the CQI information to ensure that the UE obtains the best PDSCH downlink performance in different wireless environments.

[0003] In the related art, the number and composition of TRPs in the TRP cooperation cluster can change dynamically according to the implementation of the UE. However, when the TRP cooperation cluster changes dynamically, the network-side device cannot know in advance the number and composition of TRPs in the TRP cluster, and thus cannot configure the corresponding power offset parameter. This results in a mismatch between the CQI calculated and feedback by the UE and the actual CQI during the transmission of the physical downlink shared channel PDSCH signal, making it impossible for the network-side device to obtain the accurate CQI reported by the UE during PDSCH transmission.

[0004] Therefore, when the UE calculates the PDSCH CQI based on the selected TRP cooperation cluster, how to determine the power offset parameter corresponding to the TRP cooperation cluster is an urgent problem to be solved currently. Summary of the Invention

[0005] An embodiment of the present application provides a method, apparatus, terminal, and network-side device for determining power bias parameters, which can solve the problem of how to determine the power offset parameter corresponding to the TRP cooperation cluster.

[0006] In a first aspect, a method for determining power bias parameters is provided, which is executed by a terminal. The method includes:

[0007] The terminal obtains first information;

[0008] Based on the first information, the terminal determines a power bias parameter; 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 and reception point TRP of the network-side device and the power bias parameter.

[0009] In a second aspect, a method for determining power bias parameters is provided, which is executed by a network-side device. The method includes:

[0010] The network-side device sends 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 and reception point TRP of the network-side device and the power bias parameter.

[0011] In a third aspect, a device for determining power bias parameters is provided, including:

[0012] An acquisition module, configured to acquire first information;

[0013] 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 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 and reception point TRP of the network-side device and the power bias parameter.

[0014] In a fourth aspect, a device for determining power bias parameters is provided, including:

[0015] A first sending module, configured 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 and reception point TRP of the network-side device and the power bias parameter.

[0016] In a fifth aspect, a terminal is provided, which includes a processor and a memory. The memory stores a program or instructions that can run on the processor. When the program or instructions are executed by the processor, the steps of the method described in the first aspect are implemented.

[0017] In a sixth aspect, a terminal is provided, which includes a processor and a communication interface. 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 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 a network-side device and the power bias parameter.

[0018] In a seventh aspect, a network-side device is provided, which includes a processor and a memory. The memory stores a program or instructions that can run on the processor. When the program or instructions are executed by the processor, the steps of the method described in the second aspect are implemented.

[0019] In an eighth aspect, a network-side device is provided, which includes a processor and a communication interface. The communication interface is used to send first information to a 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.

[0020] In a ninth aspect, a readable storage medium is provided. The readable storage medium stores a program or instructions. When the program or instructions are 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.

[0021] In a tenth aspect, a wireless communication system is provided, which includes a terminal and a network-side device. 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.

[0022] In an eleventh aspect, a chip is provided. The chip includes a processor and a communication interface. The communication interface is coupled to the processor, and the processor is used to run a program or instructions to implement the method described in the first aspect, or to implement the method described in the second aspect.

[0023] In a twelfth aspect, there is provided a computer program / program product, which is stored in a storage medium and is executed by at least one processor to implement the method described in the first aspect or the steps of the method described in the second aspect.

[0024] 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 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 cooperation cluster under different numbers of TRPs and the power bias parameter corresponding to the TRP cooperation cluster, so that when the terminal selects a TRP cooperation cluster for data transmission according to the implementation, it can determine an accurate power bias parameter according to the association relationship between the selected TRP cooperation cluster and the power bias parameter. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A block diagram of a wireless communication system to which embodiments of the present application can be applied is shown;

[0026] Figure 2 One of the schematic flowcharts of the method for determining the power bias parameter provided by an embodiment of the present application;

[0027] Figure 3 Another schematic flowchart of the method for determining the power bias parameter provided by an embodiment of the present application;

[0028] Figure 4 One of the schematic structural diagrams of the device for determining the power bias parameter provided by an embodiment of the present application;

[0029] Figure 5 Another schematic structural diagram of the device for determining the power bias parameter provided by an embodiment of the present application;

[0030] Figure 6 A communication device provided by an embodiment of the present application;

[0031] Figure 7 A schematic hardware structure diagram of a terminal for implementing an embodiment of the present application;

[0032] Figure 8 A network-side device provided by an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The technical solutions in the embodiments of the present application will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application fall within the protection scope of the present application.

[0034] The terms "first", "second", etc. in the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances 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 usually of the same category, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "or" in the present application means at least one of the connected objects. For example, "A or B" covers three scenarios, namely, Scenario 1: including A and not including B; Scenario 2: including B and not including A; Scenario 3: including both A and B. The character " / " generally indicates an "or" relationship between the associated objects before and after.

[0035] The term "indication" in the present application can be either a direct indication (or an explicit indication) or an indirect indication (or an implicit indication). Among them, a direct indication can be understood as that the sender clearly tells the receiver specific information, operations to be performed, or request results, etc. in the sent indication; an indirect indication can be understood as that the receiver determines the corresponding information according to the indication sent by the sender, or makes a judgment and determines the operations to be performed or request results, etc. according to the judgment result.

[0036] It should be noted that the technology described in the embodiments of this application is not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, and 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 this application are often used interchangeably, and the described technology can be used in the above-mentioned systems and radio technologies, as well as in other systems and radio technologies. The following description describes the New Radio (NR) system for example purposes, and the NR term is used in most of the following descriptions, but these technologies can also be applied to systems other than the NR system, such as the 6th Generation (6 th Generation, 6G) communication system.

[0037] Figure 1Block diagram of a wireless communication system to which embodiments of the present application can be applied. The wireless communication system includes a terminal 11 and a network-side device 12. Among them, the terminal 11 can be a mobile phone, a tablet personal computer, a 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, a flight vehicle, a vehicle user equipment (VUE), a shipborne device, a pedestrian user equipment (PUE), a smart home (home devices with wireless communication functions, such as refrigerators, TVs, washing machines, or furniture, etc.), a game console, a personal computer (PC), a teller machine, or a self-service machine, etc. Wearable devices include: smart watches, smart bracelets, smart earphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart ankle chains, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle user equipment can also be called a vehicle terminal, a vehicle controller, a vehicle module, a vehicle component, a vehicle chip, or a vehicle unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiments of the present application. The network-side device 12 can include an access network device or a core network device. Among them, the access network device can also be called a radio access network (RAN) device, a radio access network function, or a radio access network unit. The access network device can 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, Transmission Reception Point (TRP), or some other suitable term in the art. As long as the same technical effect is achieved, the base station is not limited to a specific technical term. It should be noted that in the embodiments of this application, only the base station in the NR system is taken as an example for introduction, and the specific type of the base station is not limited.

[0038] To facilitate a clearer understanding of the technical solutions provided by the embodiments of this application, some related knowledge is introduced as follows.

[0039] I. Cell-free massive Multiple-Input Multiple-Output (MIMO) system.

[0040] Cell Free Massive MIMO can be considered as a deconstruction of the traditional massive MIMO system. In the traditional massive MIMO system, antennas are concentrated and distributed at a site (base station), and UEs are distributed around the base station in the form of cells. In the massive MIMO system, a relatively large number of antennas are deployed at each base station. Therefore, a relatively high array gain and spatial resolution are provided. Multiple UEs can be served simultaneously on the same time-frequency resources, providing high throughput, high reliability, and high energy efficiency. The Cell Free Massive MIMO system breaks the concept of cells, and a large number of antennas are scattered and distributed over a wide area, and UEs are also scattered and distributed over this wide area. These antennas are called TRPs or access points (APs). In theory, each UE can communicate with each TRP. With the help of the fronthaul network and the central processing unit (CPU), a large number of geographically dispersed TRPs can jointly serve a relatively small number of UEs, and the CPU uses channel statistical information for joint detection. The Cell Free Massive MIMO network is expected to be applied to the next-generation indoor and hotspot coverage scenarios, such as smart factories, railway stations, shopping malls, stadiums, subways, hospitals, community centers, or university campuses, etc.

[0041] In practical applications, the Cell free network in hotspots can be regarded as a supercell containing multiple TRPs, where multiple TRPs use the same cell ID. According to the synchronization accuracy and connection relationship between these TRPs, multiple TRPs with high synchronization accuracy can achieve cooperative transmission.

[0042] II. CSI-RS and PDSCH Power Determination:

[0043] First, by reading System Information Block (SIB) 1, obtain the transmission power ss-PBCH-BlockPower of the cell synchronization signal in ServingCellConfigCommonSIB.

[0044]

[0045]

[0046] In the NZP-CSI-RS-Resource IE, the following two parameters are included:

[0047] 1)、powerControlOffset: It 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: It 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] Based on the power of the Synchronization Signal Block (SSB), and the two parameters powerControlOffsetSS and powerControlOffset, the UE can obtain the CSI-RS power and PDSCH power, where:

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

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

[0052] III. CQI Selection.

[0053] CQI is used to reflect the downlink channel quality and is the basis for downlink scheduling. The main process includes: CQI is measured by the UE from CSI-RS and reported under the control of the Base Station (BS). Subsequently, the BS selects appropriate modulation order, code rate, downlink data block size, etc. according to the CQI information to ensure the UE obtains the best PDSCH downlink performance in different radio environments.

[0054] The UE measures and reports CQI. The existing protocol does not define the measurement method of CQI, but only defines the selection criterion of CQI - that is, the CQI value used to ensure that the Block Error Rate (BLER) of PDSCH decoding is less than 10%. That is to say, the UE evaluates the downlink link characteristics based on the measurement results, such as the Signal Interference Noise Ratio (SINR), and uses an internal algorithm to determine the BLER value that can be obtained under this SINR condition, and reports the corresponding CQI value according to the BLER < 10% limit.

[0055] IV. CSI Report for Coherent Joint Transmission (CJT).

[0056] Rel-18 further extends to the codebook for the 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 bases for spatial and frequency domain compression generally use Discrete Fourier Transform (DFT) vectors. Since the channel usually has spatial sparsity and frequency domain correlation, the main energy is concentrated on fewer orthogonal bases after orthogonal transformation. Compression is achieved when the number of spatial domain orthogonal bases and frequency domain orthogonal bases in the feedback is much smaller than their respective complete orthogonal bases. The generated precoding matrix can be written as where W1 is a matrix of L spatial domain compression vectors selected according to the spatial domain characteristics of the channel, and W f is a matrix of M frequency domain compression vectors selected according to the frequency domain characteristics of the channel, is the compression coefficient matrix corresponding to the spatial domain compression vectors and frequency domain compression vectors. Each element is a complex number, and the amplitude and phase are quantized respectively. In the Type II enhanced codebook of Rel-16, the two polarization directions of multiple layers share the same spatial domain orthogonal bases, and the frequency domain orthogonal bases are independently selected for multiple layers.

[0057] In the CSI feedback of CJT, in order to distinguish CSI-RS from different TRPs, the network can configure N (N is an integer between 1 and 4) CSI-RS resources in a CSI-RS resource set to correspond to different TRPs respectively. The network can configure whether the UE must feedback the CJT CSI corresponding to N TRPs. In the case where the UE is configured to select M ≤ N TRPs from N TRPs, then in the CSI report, it is reported through an N-bit bitmap which M CSI-RS resources the feedback CJT CSI corresponds to.

[0058] Since the spatial domain compression characteristics and frequency domain compression characteristics of channels of different TRPs are different, after constructing the above Type II enhanced codebook of Rel-16 and the port selection Type II enhanced codebook of Rel-17 for each TRP, they can be combined into a complete CJT codebook for multiple TRPs for feedback. The network can configure two modes:

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

[0060]

[0061] Mode 2: The spatial domain orthogonal bases of each TRP are independently selected and feedback, and the frequency domain orthogonal bases shared by each TRP are selected and feedback, which can be expressed as:

[0062]

[0063] Where W 1,N is an L n spatial domain compression vector matrix selected according to the channel spatial domain characteristics of TRP n, and W f,N is an M n frequency domain compression vector matrix selected according to the channel frequency domain characteristics of TRP n, and W f is an M frequency domain compression vector matrix jointly selected according to the channel frequency domain characteristics of N TRPs, is the compression coefficient matrix corresponding to the spatial domain compression vector and the frequency domain compression vector of TRP n.

[0064] In the current CSI feedback scheme of CJT, the UE can select M ≤ N TRPs according to the implementation and report the CSI information of these M TRPs during CJT transmission. At this time, the number and composition of TRPs in the TRP cooperation cluster of CJT 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 cooperation cluster. Among them, CSI-RS is sent by each TRP separately, and the PDSCH signal is sent cooperatively by multiple TRPs. The UE needs to calculate the CQI of the PDSCH signal transmission based on M TRPs according to the measurement results of CSI-RS and the power offset (the power offset between PDSCH and CSI-RS) configured by the network, and feedback it to the network.

[0065] However, when the TRP cooperation cluster (selected based on the UE) changes dynamically, the network-side device cannot know in advance the composition of the TRP cluster and configure the corresponding power offset parameter. In the current protocol, the power offset configured for any number and composition of TRP cooperation clusters is the same. However, when the TRP cooperation cluster changes dynamically (for example, when the number of cooperating TRPs changes), the power offset between PDSCH and CSI-RS may be different, which results in a difference between the CQI calculated and fed back by the UE and the actual CQI during PDSCH transmission, and accurate CQI control cannot be achieved.

[0066] To solve the above problems, in the embodiments of the present application, when data transmission is performed, such as CJT transmission, the base station pre-configures the power offset for each possible TRP group (also known as the TRP cooperation cluster) to solve the problem of CSI mismatch caused by the dynamic change of the TRP cooperation cluster in data transmission.

[0067] For example, the network - side device configures different poweroffsets for TRP cooperation clusters including 2, 3, or 4 TRPs respectively. The UE determines the corresponding power offset according to the selected number of TRPs, then calculates the CQI based on the power offset and feeds it back to the network - side device. In this way, the network - side device can obtain an accurate CQI estimate for PDSCH transmission.

[0068] The following combines the accompanying drawings and details the method for determining power offset parameters provided by the embodiments of the present application through some embodiments and their application scenarios.

[0069] Figure 2 is one of the flow diagrams of the method for determining power offset parameters provided by the embodiments of the present application. As Figure 2 shown, the method includes step 201 - step 202; where:

[0070] Step 201, the terminal obtains first information.

[0071] It should be noted that the embodiments of the present application can be applied to scenarios where the terminal selects at least one TRP for data transmission. It can be understood that the coherent cooperative data transmission performed by the terminal selecting 2 or more TRPs (also known as a TRP cooperation cluster or a TRP group) can be called CJT transmission (Coherent Joint Transmission). The terminal includes, but is not limited to, the types of the above - listed terminal 11, and the network - side device includes, but is not limited to, the types of the above - listed network - side device 12.

[0072] In the embodiments of the present application, there are various ways for the terminal to obtain the first information. For example, the terminal can receive the first information sent by the network - side device; or for another example, the first information is pre - defined by the protocol or pre - configured by the terminal. In the case where the terminal selects at least one TRP for data transmission, the terminal can directly obtain the first information.

[0073] Step 202, the terminal determines a power offset parameter based on the first information; 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 and reception point TRP of the network - side device and the power offset parameter.

[0074] In the embodiments of the present application, TRP cooperation clusters with different numbers of TRPs (single TRP when the number of TRPs is 1) respectively correspond to a power offset parameter.

[0075] For example, when the terminal selects a single TRP for data transmission, the power bias parameter corresponding to the TRP is Δ1; when the terminal selects a TRP collaboration cluster including 3 TRPs for data transmission, the power bias parameter corresponding to the TRP collaboration cluster is Δ2.

[0076] 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.

[0077] Optionally, the terminal calculates and reports the CQI of at least one selected TRP for PDSCH transmission based on the determined power bias parameter.

[0078] In an embodiment of the present application, the terminal calculates and reports the actual CQI of the selected TRP collaborative cluster during 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.

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

[0080] 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.

[0081] Optionally, the first TRP related information includes at least one of the following:

[0082] [a] Number of TRPs.

[0083] For example, the first mapping relationship is: the power bias parameter corresponding to 1 TRP is Δ1; the power bias parameter corresponding to the TRP collaboration cluster including 3 TRPs is Δ2; the power bias parameter corresponding to the TRP collaboration cluster including 5 TRPs is Δ3.

[0084] [b] The number of downlink reference signal resources. Each TRP corresponds to one downlink reference signal resource.

[0085] Specifically, the 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.

[0086] In an embodiment of the present application, the first mapping relationship is, for example: the power bias parameter corresponding to 1 CSI-RS resource is Δ1; the power bias parameter corresponding to the CSI-RS resource set including 3 CSI-RS resources is Δ2; the power bias parameter corresponding to the CSI-RS resource combination including 5 CSI-RS resources is Δ3.

[0087] [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.

[0088] For example: if TRP index=1 corresponding to TRP[A], the first mapping relationship can be expressed as: the power offset parameter corresponding to TRP index=1 is Δ4; that is, the power offset parameter corresponding to the CSI-RS resource corresponding to TRP[A] is Δ4.

[0089] 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 Δ4, and the power bias parameter corresponding to TRP index = 2 is Δ5; that is, the power bias parameter corresponding to the CSI-RS resource corresponding to TRP[A] is Δ4, and the power bias parameter corresponding to the CSI-RS resource corresponding to TRP[B] is Δ5.

[0090] For another example, a TRP group includes 5 TRPs: TRP[A]-TRP[E], and the TRPgroup 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 Δ6; that is, the power bias parameter corresponding to the CSI-RS resource corresponding to TRP[A]-TRP[E] is Δ6.

[0091] [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.

[0092] For example: CSI-RS resource index = 1, then the first mapping relationship is: the power bias parameter corresponding to CSI-RS resource index = 1 is Δ7. 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 bias parameter corresponding to TRP [A] is Δ7.

[0093] In summary, in the above-mentioned first TRP related information, the CSI-RS resource may be indicated by at least one of the following:

[0094] 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.

[0095] 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.

[0096] The first rule is obtained through at least one of the following: network side device indication, protocol pre-definition and pre-configuration.

[0097] Optionally, the first rule includes at least one of the following:

[0098] a) The functional relationship between the TRP quantity and the power bias parameter.

[0099] Specifically, the functional relationship between the TRP number and the power bias parameter may also be referred to as a closed-form expression of the power bias parameter in terms of the TRP number.

[0100] For example, the protocol may predefine a power offset Δ=f(M), where Δ represents a power offset parameter, i.e., a power offset between a PDSCH signal and a 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.

[0101] In actual applications, when the terminal selects the number M (M≤N) of TRPs for data transmission, the power bias parameters corresponding to the number M TRPs can be calculated based on the above functional relationship.

[0102] 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.

[0103] The following further describes an embodiment in which the first information includes a first mapping relationship.

[0104] Optionally, the terminal determines the power offset parameter based on the first information, which can be implemented by the following steps 1) to 2):

[0105] 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;

[0106] Step 2) The terminal determines the power bias parameter based on the target first TRP related information and the first mapping relationship.

[0107] 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 the CSI-RS resource set includes one or more CSI-RS resources in the CSI-RS resource group.

[0108] For example, a CSI-RS resource group includes N CSI-RS resources, which are respectively represented as CSI-RS{#1,#1,...,#N}; then the first mapping relationship can be represented 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:

[0109] Table 1

[0110] CSI-RS resource set Number of CSI-RS resources in the CSI-RS resource set Power offset a 1 <![CDATA[Δ1]]> b 2 <![CDATA[Δ2]]> c … … d N <![CDATA[Δ N >

[0111] 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.

[0112] 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 first mapping relationship.

[0113] For another 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 represented as a mapping relationship between any CSI-RS resource set and a power offset parameter, which can be specifically represented by Table 2:

[0114] Table 2

[0115]

[0116] 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.

[0117] If the TRP index set includes #1, #2, #3, and #4, the terminal determines that the power bias parameter is Δ1 based on the first mapping relationship; if the TRP index set includes #1 and #4, the terminal determines that the power bias parameter is Δ8 based on the first mapping relationship.

[0118] In practical applications, the power bias parameter Δ1Δ in Table 2 above 15 They may be partially identical, entirely identical, or entirely different.

[0119] Optionally, the first information of different CSI-RS resource groups may be configured uniformly or individually.

[0120] For example, when different CSI-RS resource groups select the same CSI-RS resource quantity M, the corresponding power offset parameters can be uniformly configured to the same Δ 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

[0121] 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 the following steps 1)-2):

[0122] Step 1), the terminal receives a downlink reference signal sent by the network side device;

[0123] Step 2), the terminal calculates the 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.

[0124] 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 according to the selected M TRPs. Based on the power offset parameter, the first CSI when receiving the PDSCH signal during data transmission using M TRPs can be calculated, including CQI, precoding matrix indicator (Precoding Matrix Indicator, PMI), rank indicator (Rank Indicator, RI), etc., and the first CSI is fed back to the network side device.

[0125] 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.

[0126] Optionally, the terminal sends second information to the network side device; the second information includes at least one item of information related to the first CSI and the target first TRP.

[0127] 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:

[0128] Number of TRPs;

[0129] The number of downlink reference signal resources;

[0130] At least one of TRP index, TRP index set and TRP group index;

[0131] At least one of a downlink reference signal resource index and a downlink reference signal resource index set.

[0132] The following is a further description of an embodiment in which the first information includes the first rule.

[0133] Optionally, the terminal determines the power offset parameter based on the first information, which can be implemented by the following steps 1) to 2):

[0134] Step 1), the terminal obtains the 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;

[0135] Step 2) The terminal determines the power bias parameter based on the second TRP related information and the first rule.

[0136] Specifically, the terminal can determine the power bias parameter based on the TRP quantity and the first rule.

[0137] 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.

[0138] Optionally, the terminal may also determine the power offset parameter based on the TRP quantity change and the first rule; specifically, this may be achieved by following steps 1) to 2):

[0139] Step 1), the terminal determines the change amount of the power bias parameter based on the change amount of the TRP quantity;

[0140] Step 2), the terminal determines the power bias parameter based on the change of the power bias parameter and the preset initial power bias parameter.

[0141] 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:

[0142] When data transmission (such as CJT transmission) is performed, the power bias parameter increases by δ for each increase in the number of TRPs of cooperative transmission; the power bias parameter decreases by δ for each decrease in the number of TRPs of cooperative transmission, where δ is indicated by the network side device or predefined by the protocol.

[0143] That is to say, the power offset parameter Δ 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.

[0144] 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 the following steps 1)-2):

[0145] Step 1), the terminal receives a downlink reference signal sent by the network side device;

[0146] 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.

[0147] In the embodiment of the present application, after the terminal obtains the first rule, if the terminal selects M≤N TRPs to report the second CSI of the 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 selected M TRPs through the first rule. Based on the power offset parameter, the second CSI when receiving the PDSCH signal during data transmission using the M TRPs can be calculated, including CQI, PMI, RI, etc., and the second CSI is fed back to the network side device.

[0148] 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.

[0149] 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.

[0150] 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 TRP quantity and the TRP quantity change.

[0151] Figure 3 FIG. 2 is a flow chart of a method for determining a power bias parameter provided in an embodiment of the present application. Figure 3 As shown, the method includes step 301; wherein:

[0152] Step 301, the network side device sends the 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.

[0153] 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 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. 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.

[0154] Optionally, the network side device configures the first information for the downlink reference signal resources corresponding to the at least one TRP.

[0155] 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.

[0156] In the method for determining the power bias parameter provided in the embodiment of the present application, the network side device sends the 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 real 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 real CQI during PDSCH transmission.

[0157] Optionally, the first information includes at least one of the following:

[0158] a) a first mapping relationship, used to indicate a mapping relationship between the first TRP related information corresponding to the at least one TRP and the power offset parameter;

[0159] 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.

[0160] Optionally, the first TRP related information includes at least one of the following:

[0161] a) Number of TRPs;

[0162] b) The number of downlink reference signal resources. Each TRP corresponds to one downlink reference signal resource.

[0163] 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 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;

[0164] 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 indexes.

[0165] Optionally, the first rule includes at least one of the following:

[0166] a functional relationship between the number of TRPs and the power bias parameter;

[0167] The change in the power bias parameter is associated with the change in the TRP quantity.

[0168] Optionally, the network side device may further perform the following steps:

[0169] 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 the 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.

[0170] Optionally, the network side device may further perform the following steps:

[0171] 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 quantity and the TRP quantity change.

[0172] The power bias parameter determination method provided in the embodiment of the present application may be executed by a power bias parameter determination device. In the embodiment of the present application, the power bias parameter determination method performed by the power bias parameter determination device is taken as an example to illustrate the power bias parameter determination device provided in the embodiment of the present application.

[0173] Figure 4 is one of the structural diagrams of the device for determining the power bias parameter provided in the embodiment of the present application, such as Figure 4 As shown, the power offset parameter determination device 400, applied to a terminal, includes:

[0174] An acquisition module 401 is used to acquire first information;

[0175] 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 between at least one transmission receiving point TRP of the network side device and the power bias parameter.

[0176] In the device for determining the power bias parameter provided in the 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.

[0177] Optionally, the first information includes at least one of the following:

[0178] 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;

[0179] 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.

[0180] Optionally, the first TRP related information includes at least one of the following:

[0181] Number of TRPs;

[0182] The number of downlink reference signal resources. Each TRP corresponds to one downlink reference signal resource.

[0183] At least one of a TRP index index, a TRP index set, and a TRP group 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 the TRP group;

[0184] 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 indexes.

[0185] Optionally, the determining module 402 is further configured to:

[0186] Acquire information related to a 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;

[0187] The power bias parameter is determined based on the target first TRP related information and the first mapping relationship.

[0188] Optionally, the device further comprises:

[0189] A first receiving module, configured to receive a downlink reference signal sent by the network side device;

[0190] The first calculation module is used to calculate the 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.

[0191] Optionally, the device further comprises:

[0192] The second sending module is used to send 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.

[0193] Optionally, the first rule includes at least one of the following:

[0194] a functional relationship between the number of TRPs and the power bias parameter;

[0195] The change in the power bias parameter is associated with the change in the TRP quantity.

[0196] Optionally, the determining module 402 is further configured to:

[0197] 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;

[0198] Determine the power bias parameter based on the second TRP related information and the first rule.

[0199] Optionally, the determining module 402 is further configured to:

[0200] Determining a change in the power bias parameter based on the change in the number of TRPs;

[0201] The power bias parameter is determined based on the change amount of the power bias parameter and a preset initial power bias parameter.

[0202] Optionally, the device further comprises:

[0203] A second receiving module, used to receive a downlink reference signal sent by the network side device;

[0204] The second calculation module is used to calculate the second CSI when receiving the PDSCH signal based on the measurement result of the downlink reference signal and the power offset parameter.

[0205] Optionally, the device further comprises:

[0206] A third sending module is used to send 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.

[0207] Optionally, the acquisition module 401 is further used to:

[0208] Receive the first information from the network side device.

[0209] Figure 5 This is a second structural diagram of the device for determining the power bias parameter provided in the embodiment of the present application, such as Figure 5 As shown, the power offset parameter determination device 500, applied to a network side device, includes:

[0210] 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.

[0211] In the device for determining the power bias parameter provided in the 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.

[0212] Optionally, the first information includes at least one of the following:

[0213] 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;

[0214] 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.

[0215] Optionally, the first TRP related information includes at least one of the following:

[0216] Number of TRPs;

[0217] The number of downlink reference signal resources. Each TRP corresponds to one downlink reference signal resource.

[0218] At least one of a TRP index index, a TRP index set, and a TRP group 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 the TRP group;

[0219] 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 indexes.

[0220] Optionally, the first rule includes at least one of the following:

[0221] a functional relationship between the number of TRPs and the power bias parameter;

[0222] The change in the power bias parameter is associated with the change in the TRP quantity.

[0223] Optionally, the device further comprises:

[0224] The third receiving module is used to receive the second information sent by the terminal; the second information includes at least one item of the first channel state information CSI when the network side device sends the PDSCH signal to the terminal and the target first TRP related information, and the target first TRP related information is the first TRP related information corresponding to the TRP used to perform data transmission.

[0225] Optionally, the device further comprises:

[0226] 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 quantity and the TRP quantity change.

[0227] Optionally, the device further comprises:

[0228] A configuration module is used to configure the first information for the downlink reference signal resources corresponding to the at least one TRP.

[0229] The power bias parameter determination device in the embodiment of the present application may 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 a chip. The electronic device may be a terminal, or may be other devices other than a terminal. Exemplarily, the terminal may include but is not limited to the types of terminals 11 listed above, and other devices may be servers, network attached storage (NAS), etc., which are not specifically limited in the embodiment of the present application.

[0230] The power bias parameter determination device provided in the embodiment of the present application can achieve Figures 2 to 3 The various processes implemented by the method embodiment and achieving the same technical effect are not described here to avoid repetition.

[0231] like Figure 6As shown, the embodiment of the present application further provides a communication device 600, including a processor 601 and a memory 602, 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, the program or instruction is executed by the processor 601 to implement the above Figure 2 The steps of the embodiment of the method for determining the power bias parameter shown in the figure can achieve the same technical effect. When the communication device 600 is a network side device, the program or instruction is executed by the processor 601 to implement the above Figure 3 The various steps of the embodiment of the method for determining the power bias parameter shown in the figure can achieve the same technical effect, and will not be described again here to avoid repetition.

[0232] The embodiment of the present application also provides a terminal, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the following Figure 2 The steps in the method embodiment for determining the power offset parameter shown in the figure. This terminal embodiment corresponds to the above-mentioned terminal side method embodiment, and each implementation process and implementation method of the above-mentioned method embodiment can be applied to this terminal embodiment and can achieve the same technical effect. Specifically, Figure 7 A schematic diagram of the hardware structure of a terminal for implementing an embodiment of the present application.

[0233] 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 a processor 710.

[0234] Those skilled in the art will appreciate that the terminal 700 may also include a power source (such as a battery) for supplying power to various components, and the power source may be logically connected to the processor 710 through a power management system, thereby implementing functions such as managing charging, discharging, and power consumption management through the power management system. Figure 7 The terminal structure shown in the figure does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently, which will not be described in detail here.

[0235] It should be understood that in the 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 a volume control button, a switch button, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0236] In the embodiment of the present application, after receiving downlink data from the network side device, the RF unit 701 can transmit the data to the processor 710 for processing; in addition, the RF unit 701 can send uplink data to the network side device. Generally, the RF unit 701 includes but is not limited to an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

[0237] 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, an application program or instruction required for at least one function (such as a sound playback function, an image playback function, etc.), 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.

[0238] The processor 710 may include one or more processing units; optionally, the processor 710 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to an operating system, a user interface, and application programs, and the modem processor mainly processes wireless communication signals, such as a baseband processor. It is understandable that the modem processor may not be integrated into the processor 710.

[0239] The embodiment of the present application also 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 used to run a program or instruction to implement the following Figure 3 The steps of the power bias parameter determination method embodiment are shown. This network side device embodiment corresponds to the above network side device method embodiment, and each implementation process and implementation mode of the above method embodiment can be applied to this network side device embodiment and can achieve the same technical effect.

[0240] Specifically, the embodiment of the present application also provides a network side device. Figure 8 As shown, 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. The antenna 81 is connected to the radio frequency device 82. In the uplink direction, the radio frequency device 82 receives information through the antenna 81 and sends the received information to the baseband device 83 for processing. In the downlink direction, the baseband device 83 processes the information to be sent and sends it to the radio frequency device 82, and the radio frequency device 82 processes the received information and sends it out through the antenna 81.

[0241] 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.

[0242] The baseband device 83 may include, for example, at least one baseband board on which a plurality of chips are arranged. Figure 8 As shown, 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.

[0243] The network side device may further include a network interface 86, which is, for example, a Common Public Radio Interface (CPRI).

[0244] Specifically, the network side device 800 of the embodiment of the present application further includes: instructions or programs stored in the memory 85 and executable on the processor 84, and the processor 84 calls the instructions or programs in the memory 85 to execute. Figure 3 The method for determining the power bias parameters shown in the figure achieves the same technical effect, so it will not be described here to avoid repetition.

[0245] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, each process of the above-mentioned method for determining the power bias parameter is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0246] 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-transient readable storage medium.

[0247] 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 will not be repeated here.

[0248] 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.

[0249] The embodiment of the present application further provides a computer program / program product, which is stored in a storage medium. The computer program / program product is executed by at least one processor 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 will not be repeated here.

[0250] The 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 perform the above-mentioned Figure 2 The steps of the method for determining the power bias parameter shown in the figure, the network side device can be used to perform the above Figure 3 The steps of the method for determining the power bias parameters are shown.

[0251] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including 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 one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the method and device in the embodiment 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 reverse 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.

[0252] Through the description of the above implementation methods, 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 hardware platform, and of course, can also be implemented by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, disk, CD, etc.), including several instructions to enable a terminal or a network-side device to execute the methods described in each embodiment of the present application.

[0253] 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 the present application, ordinary technicians in this field can also make many forms of implementation methods without departing from the purpose of the present application and the scope of protection of the claims, and these implementation methods are all within the protection of the present application.

Claims

1. A method for determining a power bias parameter, characterized in that including: 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, used to indicate the mapping relationship between 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, characterized in that 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 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, characterized in that, 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, characterized in that, 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, characterized in that, 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 the power bias parameter according to any one of claims 1 to 11, characterized in that, 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, characterized in that, 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, 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.

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, and the change amount of the power bias parameter is associated with the change amount of the number of TRPs.

17. The method for determining the power bias parameter according to claim 14 or 15, characterized in that The method further includes: The network-side device receives second information sent by the terminal; the second information includes at least one of the first channel state information CSI when the network-side device sends the PDSCH signal to the terminal and the 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, characterized in that, 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 the power bias parameter according to any one of claims 13 to 18, characterized in that, 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, characterized in that It includes: 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 apparatus for determining a power bias parameter according to claim 20, wherein The first information includes at least one of the following: A first mapping relationship, used to indicate the 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.

22. The determination 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 determination device for power bias parameters according to claim 21 or 22, characterized in that, 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 determination device for power bias parameters according to claim 24, wherein The determination module is further configured to: Acquire 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; Determine the power bias parameter based on the second TRP - related information and the first rule.

26. A device for determining a power bias parameter, characterized in that, It includes: A first transmission 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 apparatus for determining a power bias parameter 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 a change amount of the number of TRPs.

28. The determination device for power bias parameters 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 determination device for power bias parameters according to claim 27, characterized in that, The first rule includes at least one of the following: A functional relationship between the number of TRPs and the power bias parameter; A 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, characterized in that, 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 the power bias parameter according to any one of claims 1 to 12 are implemented.

31. A network-side device, characterized in that, 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 the power bias parameter according to any one of claims 13 to 19 are implemented.

32. A readable storage medium, characterized in that, 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 the power bias parameter according to any one of claims 1 to 12 is implemented, or the steps of the method for determining the power bias parameter according to any one of claims 13 to 19 are implemented.

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