Channel state information report reporting method, terminal and network side equipment

Abstract

The invention discloses a channel state information report reporting method, a terminal and network side equipment, and belongs to the technical field of wireless communication, and the channel state information report reporting method comprises the steps that the terminal obtains at least one CSI; the terminal reports a CSI report based on the acquired at least one CSI; wherein the CSI report comprises at least one piece of target CSI in the at least one piece of CSI, and the at least one piece of target CSI satisfies at least one of the following conditions: at least part of the target CSI in the at least one piece of target CSI shares at least one PMI feedback quantity; under the condition that one piece of target CSI in the at least one piece of target CSI is associated with a plurality of transmission layers, the plurality of transmission layers share a first non-zero coefficient indication.

Description

Technical Field

[0001] This application belongs to the field of wireless communication technology, specifically relating to a method for reporting channel state information, a terminal, and a network-side device. Background Technology

[0002] Typically, Channel State Information (CSI) architecture can be divided into two parts: downlink CSI and uplink CSI. Downlink CSI architecture includes the downlink physical channel and downlink reference signal; uplink CSI architecture includes the uplink physical channel and uplink reference signal. The downlink physical channel is typically used for data transmission, while the downlink reference signal is typically used for channel estimation to obtain downlink channel state information (CSI). Similarly, the uplink physical channel is typically used for uplink data transmission, while the uplink reference signal is typically used for channel estimation to obtain uplink channel state information (CSI).

[0003] In 5G systems, CSI is primarily used for adaptive beamforming and multiple-input multiple-output (MIMO) technologies to improve wireless transmission bandwidth and reliability. CSI can also be used for frequency reuse and interference coordination.

[0004] Overall, the CSI architecture of 5G is a very important technology in 5G communication systems, playing a significant role in improving wireless transmission bandwidth, reliability, and interference coordination.

[0005] Currently, CSI reports only contain one CSI and are associated with no more than four transport layers, so the overhead of CSI reporting is acceptable. However, in the future, it's possible that a single CSI report may include multiple CSIs, or a single CSI report may include a CSI associated with more than four transport layers. In cases where a single CSI report includes multiple CSIs or is associated with multiple transport layers, the overhead increases, placing a burden on network resource allocation. This increased overhead may also reduce the success rate of CSI report feedback and decrease data transmission efficiency. Furthermore, higher CSI report overhead may necessitate multiple encoding operations, significantly increasing terminal complexity. Therefore, the issue of high CSI report overhead in cases involving multiple CSIs or multiple transport layers needs to be addressed. Summary of the Invention

[0006] This application provides a method, terminal, and network-side device for reporting Channel State Information (CSI) reports, which can solve the problem of high overhead in CSI reporting when a single CSI report includes multiple CSIs or when a single CSI is associated with multiple transport layers.

[0007] Firstly, a method for reporting channel state information is provided, including:

[0008] The terminal acquires at least one Channel State Information (CSI).

[0009] The terminal reports a CSI report based on the acquired at least one CSI;

[0010] The CSI report includes at least one target CSI from the at least one CSI, wherein the at least one target CSI satisfies at least one of the following:

[0011] At least some of the at least one target CSIs share at least one precoding matrix indicating the PMI feedback amount;

[0012] In the case where one of the at least one target CSIs is associated with multiple transport layers, the multiple transport layers share a first non-zero coefficient indication.

[0013] Secondly, a method for obtaining channel state information reports is provided, including:

[0014] The network-side device receives a CSI report from the terminal, wherein the CSI report includes at least one target CSI from the at least one CSI, and the at least one target CSI satisfies at least one of the following:

[0015] At least some of the at least one target CSIs share at least one precoding matrix indicating the PMI feedback amount;

[0016] In the case where one of the at least one target CSIs is associated with multiple transport layers, the multiple transport layers share a first non-zero coefficient indication.

[0017] Thirdly, a channel state information reporting device is provided, comprising:

[0018] The first acquisition module is used to acquire at least one Channel State Information (CSI).

[0019] The reporting module is used to report a CSI report based on the acquired at least one CSI;

[0020] The CSI report includes at least one target CSI from the at least one CSI, wherein the at least one target CSI satisfies at least one of the following:

[0021] At least some of the at least one target CSIs share at least one precoding matrix indicating the PMI feedback amount;

[0022] In the case where one of the at least one target CSIs is associated with multiple transport layers, the multiple transport layers share a first non-zero coefficient indication.

[0023] Fourthly, a device for acquiring channel state information reports is provided, characterized in that it includes:

[0024] A receiving module is configured to receive a CSI report reported by a terminal, wherein the CSI report includes at least one target CSI among the at least one CSI, and the at least one target CSI satisfies at least one of the following:

[0025] At least some of the at least one target CSIs share at least one precoding matrix indicating the PMI feedback amount;

[0026] In the case where one of the at least one target CSIs is associated with multiple transport layers, the multiple transport layers share a first non-zero coefficient indication;

[0027] The second acquisition module is used to acquire the at least one target CSI based on the CSI report.

[0028] Fifthly, a terminal is provided, the terminal including a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method as described in the first aspect.

[0029] In a sixth aspect, a terminal is provided, including a processor and a communication interface, wherein the processor is used to implement the steps of the method described in the first aspect, and the communication interface is used to communicate with an external device.

[0030] In a seventh aspect, a network-side device is provided, the network-side device including a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method as described in the second aspect.

[0031] Eighthly, a network-side device is provided, including a processor and a communication interface, wherein the processor is used to implement the steps of the method described in the second aspect, and the communication interface is used to communicate with an external device.

[0032] A ninth aspect provides a readable storage medium on which a program or instructions are stored, which, when executed by a processor, implement the steps of the method described in the first aspect, or implement the steps of the method described in the second aspect.

[0033] In a tenth aspect, a wireless communication system is provided, comprising: a terminal and a network-side device, wherein the terminal is configured to perform the steps of the method described in the first aspect, and the network-side device is configured to perform the steps of the method described in the second aspect.

[0034] Eleventhly, a chip is provided, the chip including a processor and a communication interface, the communication interface being coupled to the processor, the processor being used to run programs or instructions to implement the method as described in the first aspect, or to implement the method as described in the second aspect.

[0035] In a twelfth aspect, a computer program / program product is provided, the computer program / program product being stored in a storage medium, the program / program product being executed by at least one processor to implement the steps of the channel state information reporting method as described in the first aspect, or to implement the steps of the channel state information reporting acquisition method as described in the first aspect.

[0036] In this embodiment, after acquiring at least one CSI, the terminal reports a CSI report based on the acquired at least one CSI. The CSI report includes at least one target CSI from the at least one CSI, and at least some of the target CSIs share at least one precoding matrix indicator (PMI). Alternatively, if one target CSI is associated with multiple transport layers, the multiple transport layers share a first non-zero coefficient indicator. Because multiple target CSIs share at least one PMI, or multiple transport layers associated with one CSI share a first non-zero coefficient indicator, the overhead of CSI reporting can be reduced, the success rate of CSI report feedback can be improved, and thus the data transmission efficiency can be improved. Attached Figure Description

[0037] Figure 1 This diagram illustrates a block diagram of a wireless communication system to which embodiments of this application may be applied;

[0038] Figure 2 This is a schematic flowchart illustrating a method for reporting channel state information in an embodiment of this application;

[0039] Figure 3 This diagram illustrates a flowchart of a channel state information reporting method according to an embodiment of this application.

[0040] Figure 4a This is a schematic diagram illustrating the PMI feedback quantity associated with the first CSI in an embodiment of this application;

[0041] Figure 4b This is a schematic diagram illustrating the PMI feedback quantity associated with the second CSI in an embodiment of this application;

[0042] Figure 5 This illustration shows a schematic diagram of the first CSI and the second CSI sharing the PMI feedback quantity in an embodiment of this application.

[0043] Figure 6a This illustrates another schematic diagram of the PMI feedback quantity associated with the first CSI in an embodiment of this application;

[0044] Figure 6b This illustrates another schematic diagram of the PMI feedback quantity associated with the second CSI in an embodiment of this application;

[0045] Figure 7 This illustrates another schematic diagram of the first CSI and the second CSI sharing the PMI feedback quantity in an embodiment of this application;

[0046] Figure 8 A flowchart illustrating a method for obtaining channel state information in an embodiment of this application is shown.

[0047] Figure 9 This is a schematic flowchart illustrating a method for obtaining channel state information reports in an embodiment of this application;

[0048] Figure 10 This diagram illustrates a structural schematic of a channel state information reporting device according to an embodiment of this application.

[0049] Figure 11 This diagram illustrates a structural schematic of a channel state information reporting acquisition device according to an embodiment of this application.

[0050] Figure 12 This illustration shows a structural diagram of a communication device provided in an embodiment of this application;

[0051] Figure 13 This illustration shows a hardware structure diagram of a terminal provided in an embodiment of this application;

[0052] Figure 14 This diagram illustrates the hardware structure of a network-side device according to an embodiment of this application. Detailed Implementation

[0053] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0054] The terms "first," "second," etc., used in this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, without limiting the number of objects; for example, the first object can be one or more. Furthermore, "or" in this application indicates at least one of the connected objects. For example, "A or B" covers three scenarios: Scenario 1: including A but not B; Scenario 2: including B but not A; Scenario 3: including both A and B. The character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0055] The term "instruction" in this application can be either a direct instruction (or explicit instruction) or an indirect instruction (or implicit instruction). A direct instruction can be understood as one in which the sender explicitly informs the receiver of specific information, the operation to be performed, or the requested result, etc., in the instruction sent. An indirect instruction can be understood as one in which the receiver determines the corresponding information based on the instruction sent by the sender, or makes a judgment and determines the operation to be performed or the requested result, etc., based on the judgment result.

[0056] It is worth noting that the technologies described in this application are not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), or other systems. The terms "system" and "network" in this application are often used interchangeably, and the described technologies can be used with the systems and radio technologies mentioned above, as well as with other systems and radio technologies. The following description describes New Radio (NR) systems for illustrative purposes, and the term NR is used in most of the following description; however, these technologies can also be applied to systems other than NR systems, such as 6th generation (6G) radio systems. th Generation 6G communication system.

[0057] Figure 1This diagram illustrates a block diagram of a wireless communication system applicable to embodiments of this application. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 can be a mobile phone, tablet computer, laptop computer, notebook computer, personal digital assistant (PDA), handheld computer, netbook, ultra-mobile personal computer (UMPC), mobile internet device (MID), augmented reality (AR), virtual reality (VR) device, robot, wearable device, flight vehicle, vehicle user equipment (VUE), shipboard equipment, pedestrian user equipment (PUE), smart home (home devices with wireless communication capabilities, such as refrigerators, televisions, washing machines, or furniture), game console, personal computer (PC), ATM, or self-service machine, etc. Wearable devices include: smartwatches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart chains, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among these, in-vehicle devices can also be referred to as in-vehicle terminals, in-vehicle controllers, in-vehicle modules, in-vehicle components, in-vehicle chips, or in-vehicle units, etc. It should be noted that the specific type of terminal 11 is not limited in this application embodiment. Network-side equipment 12 may include access network equipment or core network equipment, wherein access network equipment may also be referred to as Radio Access Network (RAN) equipment, radio access network function, or radio access network unit. Access network equipment may include base stations, Wireless Local Area Network (WLAN) access points (AS), or Wireless Fidelity (WiFi) nodes, etc.The base station may be referred to as Node B (NB), Evolved Node B (eNB), 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 any other suitable term in the field, as long as the same technical effect is achieved. The base station is not limited to specific technical terms. It should be noted that the embodiments of this application only use the base station in the NR system as an example for introduction, and do not limit the specific type of base station.

[0058] Core network equipment may include, but is not limited to, at least one of the following: core network node, core network function, Mobility Management Entity (MME), Access and Mobility Management Function (AMF), Session Management Function (SMF), User Plane Function (UPF), Policy Control Function (PCF), Policy and Charging Rules Function (PCRF), Edge Application Server Discovery Function (EASDF), Unified Data Management (UDM), Unified Data Repository (UDR), Home Subscriber Server (HSS), Centralized network configuration (CNC), Network Repository Function (NRF), Network Exposure Function (NEF), Local NEF (or L-NEF), Binding Support Function (BSF), and Application Function. Function (AF), etc. It should be noted that the embodiments of this application only use the core network equipment in the NR system as an example for introduction, and do not limit the specific type of core network equipment.

[0059] In related technologies, CSI reports can typically be configured as follows:

[0060] • Periodic CSI Report (P-CSI): Transmitted only on the Physical Uplink Control Channel (PUCCH)

[0061] • Semi-persistent CSI Reporting (SP-CSI): Transmitted on the PUCCH or Physical Uplink Shared Channel (PUSCH). SP-CSI reporting based on the PUSCH is activated and deactivated by the CSI Request field in the Downlink Control Information (DCI) signaling. Radio Resource Control (RRC) configures a maximum of 64 trigger states, each corresponding to a CSI Report Setting. During CSI acquisition, each CSI Report Setting is associated with a resource setting containing only one CSI-RS resource set.

[0062] • Aperiodic CSI Reporting (AP-CSI): Transmitted only on the PUSCH. PUSCH-based AP-CSI reporting is activated by DCI signaling. The RRC configures multiple trigger states, each corresponding to one or more CSI report settings. A CSI request field in the DCI triggers a trigger state. The maximum configuration of the CSI request field in DCI format 0_1 ​​is 6 bits, thus supporting a maximum of 64 CSI trigger states. When the number of CSI trigger states configured by the RRC exceeds 64, the Medium Access Control (MAC) Control Element (CE) signaling maps 64 of these trigger states to the CSI request field. Each CSI trigger state can be associated with 1 to 3 resource settings. If a resource setting contains multiple resource sets, only one resource set is selected. The QCL information of the CSI-RS resources in this resource set is configured for each resource by the TCI state.

[0063] CSI resource settings can typically be configured as follows:

[0064] • M ≥ 1 resource setting;

[0065] • A resource configuration contains S ≥ 1 CSI-RS resource sets;

[0066] • A resource set contains Ks≥1 RS resources, such as: channel measurement CSI-RS / CSI-IM resources / interference measurement CSI-RS;

[0067] • One CSI-RS resource is used to configure the number of CSI-RS ports and time-frequency location information, etc.; one CSI-IM resource is used to configure the time-frequency location information of CSI-IM, etc.

[0068] In addition, in related technologies, terminals can typically determine the contents included in the CSI report through higher-level signaling or default rules. For example, higher-level signaling or default rules can indicate that the contents of the CSI report include one of the following: 'none', 'cri-ri-pmi-cqi', 'cri-RI-i1', 'cri-RI-CQI', 'cri-RSRP', 'cri-SINR', 'ssb-Index-RSRP', 'ssb-Index-SINR', or 'cri-RI-LI-PMI-CQI'.

[0069] If the terminal is configured with CSI Report Configuration (CSI-ReportConfig) and the upper-level parameter ReportQuantity is set to "none", the terminal will not report any content for CSI-ReportConfig.

[0070] For 'cri-ri-pmi-cqi' or 'cri-RI-LI-PMI-CQI', unless a relevant Non-Coherent Joint Transmission (NCJT) CSI is obtained, a CSI report generally contains only one CSI. For NCJTCSI, however, multiple CSIs may exist in a single CSI report. Furthermore, it cannot be ruled out that multiple CSIs may appear in a single CSI report in the future.

[0071] Table 1. Feedback Quantity of Rel-16e Type 2 Codebook

[0072]

[0073]

[0074] Table 1 shows the number of PMI feedbacks and overhead in a CSI report in the related art. As shown in Table 1, if a CSI report includes multiple CSIs, the overhead of the CSI report will increase, thereby putting some burden on network resource allocation. At the same time, the increase in overhead may also reduce the success rate of CSI report feedback and reduce data transmission efficiency. Therefore, this application provides a CSI report reporting method, terminal and network-side device to reduce the overhead of CSI report when a CSI report includes multiple CSIs.

[0075] The following description, in conjunction with the accompanying drawings, details the CSI report reporting method, terminal, and network-side equipment provided in this application through some embodiments and application scenarios.

[0076] Figure 2 This diagram illustrates a flowchart of a channel state information reporting method according to an embodiment of this application. This method 200 can be executed by a terminal. In other words, the method can be executed by software or hardware installed on the terminal. Figure 2 As shown, the method may include the following steps.

[0077] S210, the terminal obtains at least one CSI by measuring multiple CSI-RS configured on the network-side device, wherein the multiple CSI-RS are initially divided into multiple CSI-RS groups.

[0078] S212, At least one CSI obtained by the terminal feedback.

[0079] Optionally, prior to S210, the terminal can receive a CSI-RS configuration sent by the network-side device. This CSI-RS configuration associates multiple CSI-RSs, which can be divided into multiple CSI-RS groups according to higher-layer signaling or default rules. These multiple CSI-RS groups can include two types of CSI-RS groups: a first CSI-RS group and a second CSI-RS group. Each CSI-RS in the first CSI-RS group can be associated with a wide beam, while each CSI-RS in the second CSI-RS group can be associated with a wide beam and a narrow beam.

[0080] In one implementation, the terminal obtains at least one CSI by measuring multiple Channel State Information Reference Signals (CSI-RS) configured by the network-side device, including the following steps:

[0081] Step 1: The terminal measures the first CSI-RS group, and selects at least one first CSI-RS from the first CSI-RS group based on the measurement results, wherein the first CSI-RS group is one of the multiple CSI-RS groups;

[0082] Step 2: For any of the first CSI-RS, the terminal obtains the second CSI-RS group associated with the first CSI-RS, wherein the second CSI-RS group is a CSI-RS group other than the first CSI-RS group among the plurality of CSI-RS groups;

[0083] Step 3: The terminal obtains the at least one CSI by measuring at least one second CSI-RS in the second CSI-RS group.

[0084] For example, a CSI group (e.g., the first group) in multiple CSI-RS groups is associated with a wide beam, and each of the other groups is associated with a wide beam and each CSI-RS within a group is associated with a narrow beam. The UE selects the wide beam in that CSI group, further determines which other groups to measure, and further selects the CSI-RS feedback CSI of the narrow beam, which can reduce the number of CSI-RS measured by the UE.

[0085] One possible way to divide multiple CSI-RS groups is as follows: The network configuration CSI resource settings include two CSI-RS sets. The first set corresponds to one CSI-RS group. The terminal divides the CSI-RS in the second CSI-RS set into multiple CSI-RS groups according to the configuration order based on the number of CSI-RS in the first set. The number of the second CSI-RS group is the number of CSI-RS in the second CSI-RS set divided by the number of the first CSI-RS in the first CSI-RS set. Optionally, rounding may be performed.

[0086] Another possible allocation method for multiple CSI-RS groups is as follows: The network configuration's CSI resource settings include one CSI-RS set. The terminal identifies the CSI-RS with fewer ports as a first CSI-RS group. Based on the number of first CSI-RS in this first CSI-RS group, the remaining CSI-RS are sequentially divided into multiple CSI-RS groups. The number of second CSI-RS groups is the number of remaining CSI-RS in the CSI-RS set divided by the number of first CSI-RS in the first CSI-RS group; rounding may be optional.

[0087] Another possible way to divide multiple CSI-RS groups is as follows: the network configuration includes one CSI-RS set in the CSI resource settings, and the terminal divides the CSI-RS into multiple CSI-RS groups according to the time slots associated with the CSI-RS. CSI-RSs associated with the same time slot are grouped together.

[0088] After multiple CSI-RS groups are divided into multiple groups, the multiple groups further include a first CSI-RS group and multiple second CSI-RS groups. Optionally, the number of ports of each CSI-RS in the first CSI-RS group is 1 or 2 or does not exceed the number of ports of the CSI-RS in the second CSI-RS group. Optionally, the CSI-RS in the multiple second CSI-RS groups have the same number of CSI-RS ports.

[0089] Furthermore, the terminal first measures the first CSI-RS within the first CSI-RS group. The terminal selects at least one first CSI-RS and determines the second CSI-RS group that the terminal needs to measure based on the selected first CSI-RS. Typically, the number of second CSI-RS groups selected by the terminal is less than the number of second CSI-RS groups configured by the network, effectively reducing the number of CSI-RS measured by the terminal. Optionally, the number of second CSI-RS groups that the terminal needs to measure is the same as the number of selected CSI-RSs. Optionally, the number of first CSI-RSs selected by the terminal from the first CSI-RS group is related to the higher-layer signaling configured by the network; for example, the network configures the terminal to select N first CSI-RSs or at most N first CSI-RSs.

[0090] For example, a terminal obtains a CSI report through a first CSI-RS group and three second CSI-RS groups. The first CSI-RS group includes three single-port first CSI-RSs, and the network uses three wide beams to transmit these three first CSI-RSs. For each single-port first CSI-RS, a second CSI-RS group is associated. The terminal selects one of the three single-port first CSI-RSs through measurement. Based on the selected first CSI-RS, the terminal determines which of the three second CSI-RS groups needs to be measured. Further, assuming this second CSI-RS group includes three second CSI-RSs, the terminal can select at least one of these second CSI-RSs through measurement to obtain a CSI report and then feed back the obtained CSI report.

[0091] Optionally, the terminal indicates to the network the first CSI-RS selected from the first CSI-RS group. Optionally, the terminal indicates the selected first CSI-RS via a first CSI-RS Resource Indicator (CRI). Optionally, the bit width of the first CRI is related to the number of first CSI-RS in the first CSI-RS group. Further, optionally, the terminal selects a second CSI-RS from the second CSI-RS group indicated by the network; optionally, the terminal indicates the second CSI-RS selected from the second CSI-RS group via a second CRI. Optionally, the bit width of the second CRI is related to the number of CSI-RS in the second CSI-RS group. Optionally, the network side can determine the second CSI-RS group associated with the CSI reported by the terminal via the first CRI associated with the first CSI-RS group; further, the network determines the CSI-RS associated with a specific CSI reported by the terminal based on the second CRI associated with the second CSI-RS group.

[0092] Alternatively, the terminal may indicate to the network the location of the second CSI-RS associated with the CSI within all second CSI-RS groups. Optionally, this location may be indicated by a third CRI indication. Optionally, the bit width of the third CRI indication may be related to the number of all CSI-RSs associated with all second CSI-RS groups. Optionally, the network-side device may determine the second CSI-RS associated with its associated CSI using the third CRI indication, and further determine the first CSI-RS associated with the CSI.

[0093] By dividing multiple CSI-RS into multiple groups, the number of CSI-RS for UE beam training and CSI feedback measurement can be reduced. In addition, the latency of UE beam training and CSI feedback can also be reduced by performing UE beam training and CSI feedback separately.

[0094] Additionally, in S212, when the terminal reports back at least one acquired CSI, it can do so as follows: Figure 3 The channel state information reporting method shown here feeds back at least one acquired CSI to the network-side device. For details, please refer to the relevant description below.

[0095] Figure 3 This diagram illustrates a flowchart of a channel state information reporting method according to an embodiment of this application. This method 300 can be executed by a terminal. In other words, the method can be executed by software or hardware installed on the terminal. Figure 3As shown, the method may include the following steps.

[0096] S310, the terminal acquires at least one CSI.

[0097] In this embodiment of the application, the terminal can obtain at least one CSI based on the Channel State Information Reference Signal (CSI-RS) configured by the network-side device.

[0098] In one implementation, S310 may include: the terminal can obtain the at least one CSI by measuring multiple CSI-RS configured by the network-side device; wherein the multiple CSI-RS are divided into multiple CSI-RS groups according to higher-layer signaling or default rules. For example, the terminal can obtain the at least one CSI according to S210 in method 200 above.

[0099] Of course, obtaining at least one CSI is not limited to the above step S210. In practical applications, at least one CSI can also be obtained by other methods. For example, the network-side device is configured with multiple CSI-RS, which do not need to be grouped. The terminal obtains at least one CSI through these multiple CSI-RS.

[0100] In the above implementation, optionally, S310 may include the following steps:

[0101] Step 1: The terminal measures the first CSI-RS group, and selects at least one first CSI-RS from the first CSI-RS group based on the measurement results, wherein the first CSI-RS group is one of the multiple CSI-RS groups;

[0102] Step 2: For any of the first CSI-RS, the terminal obtains the second CSI-RS group associated with the first CSI-RS, wherein the second CSI-RS group is a CSI-RS group other than the first CSI-RS group among the plurality of CSI-RS groups;

[0103] Step 3: The terminal obtains the at least one CSI by measuring at least one second CSI-RS in the second CSI-RS group.

[0104] By dividing multiple CSI-RS into multiple groups through the above implementation method, the number of CSI-RS for UE beam training and CSI feedback measurement can be reduced. In addition, compared with UE beam training and CSI feedback being performed separately, the latency of UE beam training and CSI feedback can also be reduced.

[0105] S312, the terminal reports a CSI report based on the acquired at least one CSI.

[0106] In this embodiment of the application, the CSI report includes at least one target CSI from the at least one CSI, and the at least one target CSI satisfies at least one of the following:

[0107] (1) At least some of the target CSIs share at least one PMI feedback quantity; that is, some or all of the target CSIs share at least one PMI feedback quantity. In the embodiments of this application, it can be understood that at least some target CSIs sharing at least one PMI feedback quantity means that at least some target CSIs report a PMI feedback quantity in the CSI report, or in other words, the shared PMI feedback quantity is unrelated to the CSI serial number or the number of CSIs.

[0108] (2) In the case where one of the at least one target CSIs is associated with multiple transport layers, the multiple transport layers share a first non-zero coefficient indication. That is, in the case where one target CSI is associated with multiple transport layers, the length of the first non-zero coefficient indication associated with the target CSI reported in the CSI report is independent of the number of layers, and the multiple transport layers associated with the target CSI report a first non-zero coefficient indication.

[0109] In one alternative implementation, the terminal can obtain information via higher-layer signaling which target CSIs in the CSI report can share at least one PMI feedback quantity. For example, the network-side device divides the CSI-RS into multiple CSI-RS groups or sets via higher-layer signaling. The terminal assumes that each CSI-RS group is associated with a TRP, and for each CSI-RS group or set, the multiple CSIs reported by the terminal can share at least one PMI feedback quantity.

[0110] By using the technical solutions provided in the embodiments of this application, at least some of the target CSIs share at least one PMI feedback quantity or multiple transport layers associated with multiple transport layer target CSIs share a first non-zero coefficient indication, thereby compressing the overhead of CSI reporting, reducing CSI feedback overhead, and thus improving the success rate of CSI report feedback, as well as improving data transmission efficiency.

[0111] Understandably, reducing CSI feedback overhead can further reduce the number of encoding steps, thereby reducing terminal complexity.

[0112] In one implementation, when the at least one PMI feedback quantity includes a second non-zero coefficient indication, the at least partial target CSI satisfies at least one of the following:

[0113] (1) The same spatial basis vectors are associated with the same second non-zero coefficient indicator part;

[0114] (2) The same second non-zero coefficient indicator part is associated with the same frequency domain basis vectors;

[0115] (3) The same second non-zero coefficients are associated with the same Doppler domain basis vectors;

[0116] (4) The second non-zero coefficients of the basis vectors in the same polarization direction and the same spatial domain are associated with the same indication part;

[0117] (5) The second non-zero coefficients indicating the same polarization direction and the same frequency domain basis vectors are associated with the same polarization direction;

[0118] (6) The second non-zero coefficients of the same polarization direction and the same Doppler domain basis vectors are associated with the same indication part.

[0119] In this embodiment, the second non-zero coefficient indicator is associated with the coefficients of all selected basis vectors. That is, through the second non-zero coefficient indicator, the network-side device can determine whether the coefficient of each basis vector is zero or whether the magnitude of the coefficient is zero. The second non-zero coefficient indicator portion is associated with at least one coefficient of a basis vector. That is, through the second non-zero coefficient indicator portion, the network-side device can determine whether the coefficient of its associated basis vector is zero or whether the magnitude of the coefficient is zero.

[0120] In one implementation, the length of the second non-zero coefficient indicator is determined according to at least one of the following:

[0121] (1) The maximum value of the rank values ​​of at least some of the target CSIs;

[0122] (2) The rank value of at least a portion of the target CSI;

[0123] (3) The number of spatial basis vectors in the union of the spatial basis vectors associated with at least some of the target CSIs;

[0124] (4) The number of frequency domain basis vectors in the union of the frequency domain basis vectors associated with at least some of the target CSIs;

[0125] (5) The number of Doppler basis vectors in the union of the Doppler domain basis vectors associated with at least some of the target CSIs.

[0126] For example, when the PMI feedback quantity shared among multiple CSIs in a single CSI report includes a second non-zero coefficient indication, meaning only one terminal provides a second non-zero coefficient indication associated with multiple CSIs. The length of this second non-zero coefficient indication can be determined based on one of the following:

[0127] 1) The maximum value among the rank values ​​of at least some of the target CSIs, that is, the length indicated by the second non-zero coefficient is related to the maximum value of the rank of multiple target CSIs sharing the PMI feedback quantity;

[0128] 2) The rank value of at least a portion of the target CSIs. That is, the length indicated by the second non-zero coefficient is related to the rank values ​​of multiple target CSIs sharing the PMI feedback, where multiple target CSIs sharing the PMI feedback have the same rank value.

[0129] 3) The number of spatial basis vectors in the union of the spatial basis vectors associated with at least some of the target CSIs. That is, the length indicated by the second non-zero coefficient is related to the number of basis vectors in the union of the spatial basis vectors associated with multiple target CSIs sharing the PMI feedback.

[0130] 4) The number of frequency domain basis vectors in the union of the frequency domain basis vectors associated with at least some of the target CSIs. That is, the length indicated by the second non-zero coefficient is related to the number of basis vectors in the union of the frequency domain basis vectors associated with multiple target CSIs sharing the PMI feedback.

[0131] 5) The number of Doppler basis vectors in the union of the Doppler domain basis vectors associated with at least some of the target CSIs. That is, the length indicated by the second non-zero coefficient is related to the number of basis vectors in the union of the Doppler domain basis vectors associated with multiple target CSIs sharing the PMI feedback.

[0132] Here, the union of the basis vectors of the aforementioned target domain (including the spatial domain, frequency domain, and Doppler domain) represents a set of basis vectors for the target domain. Each basis vector in the set is distinct; identical basis vectors are counted as 1 in the union. Optionally, multiple unions of target domain basis vectors may exist, each union associated with a transport layer. Optionally, each union may possess which of the features (or combinations of features) from 1) / 2) / 3) / 4) / 5) mentioned above is indicated by the network via higher-layer signaling.

[0133] Alternatively, there may be a subset of subsequences or bits in the second non-zero coefficient indication that are associated with multiple target CSIs, meaning that at least one of the following characteristics may occur:

[0134] 1) Multiple CSI-associated spatial basis vectors are associated with the same second non-zero coefficient indicator portion;

[0135] 2) Multiple CSI-associated frequency domain basis vectors are associated with the same second non-zero coefficient indicator portion;

[0136] 3) Multiple CSI-associated Doppler domain basis vectors are associated with the same second non-zero coefficient indicator portion;

[0137] 4) Multiple CSIs associated with the same polarization direction and the same spatial basis vector are associated with the same second non-zero coefficient indicator part;

[0138] 5) The second non-zero coefficient indicator portion of multiple CSIs associated with the same polarization direction and the same frequency domain basis vector;

[0139] 6) Multiple CSIs with the same polarization direction and the same Doppler domain basis vector are associated with the same second non-zero coefficient indicator.

[0140] Optionally, the same second non-zero coefficient indication portion associated with the plurality of target CSIs is associated with a transport layer; optionally, which feature or combination of features among the above 1) / 2) / 3) / 4) / 5) / 6) of the plurality of target CSIs is indicated by the network-side device through higher-layer signaling.

[0141] In one implementation, the CSI report also includes at least one of the following:

[0142] (1) First indication information, used to indicate the number of spatial basis vectors in the union of the spatial basis vectors associated with at least some of the target CSIs;

[0143] (2) Second indication information, used to indicate the number of frequency domain basis vectors in the union of the frequency domain basis vectors associated with at least some of the target CSIs;

[0144] (3) Third indication information, for the number of Doppler basis vectors in the union set of the Doppler domain basis vectors associated with at least part of the target CSI.

[0145] For example, optionally, the number of basis vectors in the union of spatial basis vectors associated with multiple target CSIs is reported by the terminal in the CSI report, and optionally, this number is indicated in part 1 of the CSI report. Optionally, if there are multiple unions of spatial basis vectors and each union is associated with a transport layer, the terminal reports the number of basis vectors in each union separately, or reports the total number of basis vectors in all unions in the CSI report.

[0146] Optionally, the number of basis vectors in the union of frequency domain basis vectors associated with multiple target CSIs is reported by the terminal in the CSI report; alternatively, this number is indicated in CSI part 1. Optionally, if there are multiple unions of frequency domain basis vectors and each union is associated with a transport layer, the terminal reports the number of basis vectors in each union in the CSI report, or reports the total number of basis vectors in all unions.

[0147] Optionally, the number of basis vectors in the union of multiple target CSI-associated Doppler domain basis vectors is reported by the terminal in the CSI report. Optionally, this number is indicated in CSI part 1. Optionally, if there are multiple unions of Doppler domain basis vectors and each union is associated with a transport layer, the terminal reports the number of basis vectors in each union in the CSI report, or reports the total number of basis vectors in all unions.

[0148] Specifically, when multiple target CSIs share a spatial basis vector indication, i.e., multiple target CSIs are associated with the same spatial basis vector, the number of basis vectors in the union of the spatial basis vectors associated with the multiple target CSIs does not need to be indicated separately in CSI part 1. That is, the CSI report does not include the number of basis vectors in the union of the spatial basis vectors associated with the multiple target CSIs that share the spatial basis vector indication.

[0149] Specifically, when multiple target CSIs share a frequency domain basis vector indication, i.e., multiple target CSIs are associated with the same frequency domain basis vector, the number of basis vectors in the union of the frequency domain basis vectors associated with the multiple target CSIs does not need to be indicated separately in CSI part 1. That is, the CSI report does not include the number of basis vectors in the union of the frequency domain basis vectors associated with the multiple target CSIs that share the frequency domain basis vector indication.

[0150] Specifically, when multiple target CSIs share the Doppler domain basis vector indication, i.e., multiple target CSIs are associated with the same Doppler domain basis vector, the number of basis vectors in the union of the Doppler domain basis vectors associated with the multiple target CSIs does not need to be indicated separately in CSI part 1. That is, the CSI report does not include the number of basis vectors in the union of the Doppler domain basis vectors associated with the multiple target CSIs that share the Doppler domain basis vector indication.

[0151] In another implementation, alternatively, the network-side device obtains the number of base vectors in the union of the spatial base vectors associated with multiple CSIs through the spatial base vector indication of each target CSI. Optionally, this spatial base vector indication is located in Part 1 of the CSI report.

[0152] Optionally, the network-side device obtains the number of base vectors in the union of the frequency domain base vectors associated with multiple CSIs through the frequency domain base vector indication of each target CSI. Optionally, this frequency domain base vector indication is located in Part 1 of the CSI report.

[0153] Optionally, the network-side device obtains the number of base vectors in the union of multiple CSI-associated Doppler domain base vectors through the Doppler domain base vector indication for each target CSI. Optionally, this Doppler domain base vector indication is located in Part 1 of the CSI report.

[0154] In another embodiment, the first indication information is used to indicate a first quantity, wherein the number of spatial basis vectors in the union of the spatial basis vectors associated with at least some of the target CSIs is the difference between the total number of spatial basis vectors associated with at least some of the target CSIs and the first quantity.

[0155] The second indication information is used to indicate a second quantity, wherein the number of frequency domain basis vectors in the union of the frequency domain basis vectors associated with at least some of the target CSIs is the difference between the total number of frequency domain basis vectors associated with at least some of the target CSIs and the second quantity;

[0156] The third indication information is used to indicate a third quantity, wherein the number of Doppler domain basis vectors in the union of the Doppler domain basis vectors associated with at least some of the target CSIs is the difference between the total number of Doppler domain basis vectors associated with at least some of the target CSIs and the third quantity.

[0157] For example, the number of basis vectors in the union of multiple CSI-associated spatial basis vectors is determined by a first number fed back by the terminal in the CSI report, which is an integer greater than or equal to 0.

[0158] Optionally, the number of basis vectors in the union of multiple CSI-associated spatial basis vectors is determined by subtracting this first number from the sum of the number of all spatial basis vectors associated with the multiple CSIs.

[0159] Optionally, the first quantity is located in CSI report Part 1. In particular, when multiple CSIs share the same spatial basis vector indication, i.e., multiple CSIs are associated with the same spatial basis vector, the first quantity does not need to be indicated separately in CSI Part 1.

[0160] The number of basis vectors in the union of multiple CSI-associated frequency domain basis vectors is determined by a second number fed back by the terminal in the CSI report, which is an integer greater than or equal to 0.

[0161] Alternatively, the number of basis vectors in the union of the frequency domain basis vectors associated with multiple CSIs is determined by subtracting this second number from the sum of the number of all frequency domain basis vectors associated with multiple CSIs.

[0162] Optionally, the second quantity is located in CSI report Part 1. In particular, when multiple CSIs share the frequency domain basis vector indication, i.e., multiple CSIs are associated with the same frequency domain basis vector, the second quantity does not need to be indicated separately in CSI Part 1.

[0163] The number of basis vectors in the union of multiple CSI-associated Doppler domain basis vectors is determined by a third number fed back by the terminal in the CSI report, which is an integer greater than or equal to 0.

[0164] Optionally, the number of basis vectors in the union of the Doppler domain basis vectors associated with multiple CSIs is determined by subtracting this third number from the sum of the number of all Doppler domain basis vectors associated with multiple CSIs.

[0165] Optionally, the third quantity is located in Part 1 of the CSI report. In particular, when multiple CSIs share the Doppler domain basis vector indication, i.e., multiple CSIs are associated with the same Doppler domain basis vector, the third quantity does not need to be indicated separately in CSI Part 1.

[0166] For example: the non-zero coefficient indicators associated with the two CSI layer 1s are respectively as follows: Figure 4a and Figure 4b As shown, different filling patterns represent selected frequency domain basis vectors, different shapes represent selected spatial domain basis vectors, and each pattern is associated with a bit indicated by a non-zero coefficient.

[0167] If the two CSIs are fed back independently, 50 bits are required. If the layer 1 of the two CSIs shares the non-zero coefficient indicator, or if the same spatial basis vector is associated with the same non-zero coefficient indicator bit sequence, then the fed-back non-zero coefficient indicator is as follows: Figure 5 As shown, only 35 bits are needed, saving 15 bits.

[0168] Alternatively, for each transport layer, both CSIs can use a shared non-zero coefficient indicator, which can effectively reduce the overhead of the non-zero coefficient indicator.

[0169] Optionally, the terminal needs to indicate the length of the shared second non-zero coefficient indication sequence to the network-side device through the CSI report. Therefore, the terminal can indicate to the network the number of spatial basis vectors associated with the second non-zero coefficient indication sequence, which is 7, that is, the number of basis vectors in the union of the spatial basis vectors associated with the two CSIs. Furthermore, the network-side device can determine the length of the second non-zero coefficient indication sequence by the number of basis vectors in the union of the spatial basis vectors.

[0170] Specifically, for high-rank transmissions, the terminal can indicate to the network-side device the number of basis vectors in the union of spatial basis vectors associated with each layer, or the sum of the number of basis vectors in the union of multiple spatial basis vectors associated with all layers, or the number of basis vectors in the union of a single spatial basis vector associated with all layers.

[0171] Alternatively, the terminal may indicate multiple CSI-associated spatial basis vector indications in CSI report part 1, and the network-side device may determine the spatial basis vector associated with each CSI based on the spatial basis vector indications, and further determine the number of basis vectors in the union of one or more spatial basis vectors associated with two CSIs.

[0172] For example, the non-zero coefficient indicators associated with the two CSI layer 1s are respectively as follows: Figure 6a and Figure 6b As shown, different patterns represent selected spatial basis vectors, different shapes represent selected frequency basis vectors, and each pattern is associated with a bit indicated by a non-zero coefficient.

[0173] If the two CSIs are fed back independently, 50 bits are required. If the layer 1 of the two CSIs shares the non-zero coefficient indicator, or if the same spatial basis vector is associated with the same non-zero coefficient indicator bit sequence, then the fed-back non-zero coefficient indicator is as follows: Figure 7 As shown, only 35 bits are needed, saving 15 bits. Alternatively, for each transport layer, both CSIs can use a shared non-zero coefficient indicator, which can effectively reduce the non-zero coefficient indicator overhead.

[0174] Optionally, the terminal needs to indicate the length of the shared non-zero coefficient indicator sequence to the network. Therefore, the terminal can indicate the number of frequency domain basis vectors associated with the second non-zero coefficient indicator sequence, which is 7, representing the number of basis vectors in the union of the frequency domain basis vectors associated with the two CSIs. Specifically, for high-rank transmissions, the terminal can indicate to the network separately the number of basis vectors in the union of the frequency domain basis vectors associated with each layer, or the sum of the number of basis vectors in the union of multiple frequency domain basis vectors associated with all layers, or the number of basis vectors in the union of a single frequency domain basis vector associated with all layers.

[0175] Alternatively, the terminal may indicate multiple frequency domain basis vector indications associated with CSI in CSI report part 1, and the network may determine the frequency domain basis vector associated with each CSI based on the frequency domain basis vector indications, and further determine the number of basis vectors in the union of one or more frequency domain basis vectors associated with two CSIs.

[0176] In this embodiment of the application, the at least some target CSIs that share at least one PMI feedback quantity in the CSI report may be associated with different rank values; or, the at least some target CSIs that share at least one PMI feedback quantity in the CSI report may also be associated with the same rank value.

[0177] In one implementation, the CSI report may further include: at least one target layer association indicator, wherein the target layer association indicator is used to indicate the layer correspondence between at least some of the target CSIs. Specifically, if a layer association indicator associates only one CSI, then the CSI report may not include that layer association indicator. Specifically, if the rank of each CSI association is 1, then the CSI report may not include that layer association indicator.

[0178] For example, when a CSI report shares a PMI feedback quantity among multiple target CSIs that includes a second non-zero coefficient indication, meaning only one terminal feeds back a second non-zero coefficient indication associated with multiple target CSIs. If there is a target CSI associated with a rank value greater than 1, then the CSI report may contain at least one layer association indication to indicate the layer association relationship of multiple target CSIs. That is, for layers of multiple target CSIs with association relationships, the second non-zero coefficient indication portion of the layer association may contain at least one bit of the non-zero coefficient indication associated with multiple CSIs. Optionally, in the CSI report, multiple target CSIs sharing at least one PMI feedback quantity are associated with different rank values. Optionally, the presence of a layer association indication may be determined by protocol agreement or network configuration.

[0179] Optional, which layers need to be associated, the layer association indication can be agreed upon by protocol or network configuration.

[0180] Optionally, the number of layers associated with a layer association can be determined by protocol or network configuration.

[0181] Optionally, the number of layer association indicators can be agreed upon by the protocol or configured by the network-side device. For example, the network-side device may configure the CSI report to associate two layer association indicators, with each association indicating that a group of layers have an association relationship.

[0182] Optionally, each layer association indicates the association of all CSIs. For example, the UE provides two associations for two CSIs, with each association relating to two layers corresponding to two CSIs.

[0183] For example, two CSIs are both rank=2, and the spatial domain (SD) associated with each CSI is shown in Table 2.

[0184] Table 2.

[0185] Associated SD The first CSI layer 1 SD0, SD2, SD4 The first CSI layer 2 SD0, SD3, SD4 The second CSI layer 1 SD0, SD3, SD4 The second CSI layer 2 SD1, SD2, SD4

[0186] If the layer 1 of the first CSI and the layer 2 of the second CSI are associated with the same non-zero coefficient indicator, and the layer 2 of the first CSI and the layer 1 of the second CSI are associated with the same non-zero coefficient indicator, the overhead of the non-zero coefficient indicator can be minimized. Therefore, the CSI report may contain layer association indicators to indicate the layer association relationship of multiple CSIs, that is, the layer 1 of the first CSI is associated with the layer 2 of the second CSI, and the layer 2 of the first CSI is associated with the layer 1 of the second CSI.

[0187] In one implementation, the terminal can obtain the at least one target layer association indication in the following way:

[0188] The terminal obtains at least one candidate layer association indication configured by the network-side device;

[0189] The terminal selects the at least one target layer association indication from the at least one candidate layer association indication based on the at least some target CSI.

[0190] For example, if a network-side device configures multiple candidate layer association indicators, and a terminal selects at least one candidate layer association indicator from them and indicates it to the network-side device in the CSI report, then the terminal only needs to indicate the position of the candidate layer association indicator selected by the terminal in the network-configured candidate layer association indicator by using a bit sequence.

[0191] In one implementation, alternatively, a layer association indicator in the CSI report may be a bit sequence whose length is related to the maximum value of the rank of each CSI associated with the layer association indicator.

[0192] Optionally, the layer association indications indicated by the terminal are obtained through default rules. For example, for each CSI, the terminal feeds back 1 LI (layer indication). The network-side device can rearrange the layers according to the LI of each CSI. After rearrangement, each layer association indication is associated with a layer of each CSI in turn.

[0193] Alternatively, the rearrangement method is as follows: all layers indicated by LI are associated, and for each CSI, the other layers except the LI-indicated layer are sorted in ascending order of layer number, and the other layers of all CSIs are associated in order.

[0194] Alternatively, the rearrangement method can be as follows: all layers indicated by LI are associated, and for each CSI, the other layers except the layer indicated by LI are cyclically shifted according to the layer indicated by LI, and the other layers of all CSIs are associated sequentially according to the order after the cyclic shift.

[0195] For example, taking 3 CSIs, each CSI associated with 3 layers, the association relationship of each layer of the 3 CSIs is shown in Table 3.

[0196] Table 3.

[0197] CSI1 layer1 CSI2 layer 1 CSI3 layer 1 CSI1 layer2 CSI2 layer2 CSI3 layer 2 CSI1 layer 3 CSI2 layer 3 CSI3 layer 3

[0198] For Table 3 above, the terminal determines that the PMI overhead is minimized by pointing the three LI indications to CSI1 layer2, CSI2 layer1, and CSI3 layer3 respectively based on the base vector associated with each CSI. Then, the network-side device rearranges Table 3 according to the LI indications to obtain Table 4 or Table 5.

[0199] Table 4.

[0200] CSI1 layer2 CSI2 layer 1 CSI3 layer 3 CSI1 layer1 CSI2 layer2 CSI3 layer 1 CSI1 layer 3 CSI2 layer 3 CSI3 layer 2

[0201] Table 5.

[0202] CSI1 layer2 CSI2 layer 1 CSI3 layer 3 CSI1 layer 3 CSI2 layer2 CSI3 layer 1 CSI1 layer1 CSI2 layer 3 CSI3 layer 2

[0203] According to the default rules, network-side devices assume that each row in the table above represents a layer association indicator and can share at least one PMI feedback quantity.

[0204] Optionally, the layer association indication from the terminal feedback can be located in Group 0 of section 2 of the CSI report.

[0205] Optional, special, if the rank value of all CSI associations is equal to 1, then the layer association indicator may not exist in the CSI report, which is used to indicate the layer association relationship of multiple CSIs.

[0206] In one implementation, when a first non-zero coefficient indication is shared among multiple transport layers associated with a target CSI, the multiple transport layers associated with the target CSI satisfy at least one of the following:

[0207] (1) The same spatial basis vectors are associated with the same first non-zero coefficient indicator part;

[0208] (2) The same first non-zero coefficient indicator part is associated with the same frequency domain basis vectors;

[0209] (3) The same Doppler domain basis vectors are associated with the same first non-zero coefficient indicator part;

[0210] (4) The first non-zero coefficients of the basis vectors in the same polarization direction and the same spatial domain are associated with the same indication part;

[0211] (5) The first non-zero coefficients of the same polarization direction and the same frequency domain basis vectors are associated with the same indication part;

[0212] (6) The first non-zero coefficients of the same polarization direction and the same Doppler domain basis vectors are associated with the same indication part.

[0213] In one implementation, the length of the first non-zero coefficient indicator can be determined according to at least one of the following:

[0214] (1) The number of spatial basis vectors in the union of the spatial basis vectors associated with the multiple transport layers of the target CSI; that is, the length indicated by the first non-zero coefficient is related to the number of spatial basis vectors in the union of the multiple transport layers of the target CSI.

[0215] (2) The number of frequency domain basis vectors in the union of the frequency domain basis vectors associated with the multiple transmission layers of the target CSI; that is, the length indicated by the first non-zero coefficient is related to the number of the union of the frequency domain basis vectors associated with the multiple transmission layers of the target CSI.

[0216] (3) The number of Doppler basis vectors in the union of the Doppler domain basis vectors associated with the multiple transmission layers of the target CSI. That is, the length indicated by the first non-zero coefficient is related to the number of the union of the Doppler domain basis vectors associated with the multiple transmission layers of the target CSI.

[0217] For example, when a target CSI reported by a CSI is associated with multiple transport layers, and the PMI feedback quantity shared among these multiple transport layers includes a first non-zero coefficient indication, that is, only one first non-zero coefficient indication is fed back by the terminal for association with multiple transport layers. The first non-zero coefficient indication has at least one of the following characteristics:

[0218] 1) The length indicated by the first non-zero coefficient is related to the number of basis vectors in the union of the spatial basis vectors associated with multiple transport layers of the target CSI;

[0219] 2) The length indicated by the first non-zero coefficient is related to the number of basis vectors in the union of the frequency domain basis vectors associated with the multiple transmission layers of the target CSI;

[0220] 3) The length indicated by the first non-zero coefficient is related to the number of basis vectors in the union of the Doppler domain basis vectors associated with the multiple transmission layers of the CSI;

[0221] The union of the basis vectors of the target domain (spatial domain, frequency domain, or Doppler domain) represents a set of basis vectors of the target domain. Each basis vector in the set is different, that is, the same basis vectors are counted as 1 in the union.

[0222] Optionally, there can be a union of one target domain basis vectors, with all transport layers associated with a single union.

[0223] Optionally, the network-side device indicates via higher-layer signaling which of the above features or combinations of features constitutes a union.

[0224] Alternatively, there may be a subset of subsequences or bits in the first non-zero coefficient indication that are associated with multiple transport layers, i.e., at least one of the following characteristics may occur:

[0225] 1) Associated spatial basis vectors share the same non-zero coefficient indicator portion;

[0226] 2) Associated frequency domain basis vectors share the same non-zero coefficient indicator portion;

[0227] 3) The same Doppler domain basis vectors associated with the same non-zero coefficient indicator portion;

[0228] 4) Non-zero coefficients indicating the same polarization direction and spatial basis vectors are associated with the same basis vectors;

[0229] 5) Non-zero coefficients indicating the same polarization direction and frequency domain basis vectors;

[0230] 6) The non-zero coefficients of the same polarization direction and the same Doppler domain basis vectors are associated with the same indication part.

[0231] Optionally, the non-zero coefficient indication portion, which has that feature or combination of features associated with the same feature, can be indicated by the network-side device via higher-layer signaling.

[0232] In this embodiment, at least one of the at least some target CSIs may be associated with multiple transport layers. In this case, the terminal can indicate the layer correspondence between the target CSIs associated with the same first non-zero coefficient indication through a target layer association indication. For example, layer 1 of the first CSI and layer 1 of the second CSI share a first non-zero coefficient indication, and layer 2 of the first CSI and layer 2 of the second CSI share a second non-zero coefficient indication. Alternatively, in an optional implementation, when at least one of the at least some target CSIs is associated with multiple transport layers, all transport layers of the at least some target CSIs can share a third non-zero coefficient indication. That is, in this optional implementation, all layers of the multiple target CSIs can share the third non-zero coefficient indication, and the length of the third non-zero coefficient indication is not related to the number of layers, but only to the union of the basis vectors.

[0233] In the above implementation, optionally, all transport layers of the at least partial target CSI satisfy at least one of the following:

[0234] (1) The same spatial basis vectors are associated with the same third non-zero coefficient indicator part;

[0235] (2) The same third non-zero coefficient indicator part is associated with the same frequency domain basis vectors;

[0236] (3) The same third non-zero coefficients are associated with the same Doppler domain basis vectors;

[0237] (4) The third non-zero coefficients of the basis vectors in the same polarization direction and the same spatial domain are associated with the same indication part;

[0238] (5) The third non-zero coefficients indicating the same polarization direction and the same frequency domain basis vectors are associated with the same polarization direction;

[0239] (6) The third non-zero coefficients of the same polarization direction and the same Doppler domain basis vectors are associated with the same indication part.

[0240] In the above implementation, optionally, the length of the third non-zero coefficient indicator is determined according to at least one of the following:

[0241] (1) The number of spatial basis vectors in the union of all transport layer associated spatial basis vectors of at least some of the target CSI;

[0242] (2) The number of frequency domain basis vectors in the union of all transport layer associated frequency domain basis vectors of at least some of the target CSI;

[0243] (3) The number of Doppler basis vectors in the union of all transport layer-associated Doppler domain basis vectors of at least some of the target CSIs.

[0244] For example, when multiple target CSIs are associated in a single CSI report, and each target CSI is associated with at least one transport layer, the PMI feedback quantity shared across all transport layers of the multiple movie ticket CSIs includes a non-zero coefficient indication; that is, only one terminal feeds back a third non-zero coefficient indication associated with multiple CSIs and multiple transport layers. This third non-zero coefficient indication has at least one of the following characteristics:

[0245] 1) The length of the third non-zero coefficient is related to the number of basis vectors in the union of all transport layer spatial basis vectors associated with all CSIs;

[0246] 2) The length of the third non-zero coefficient is related to the number of basis vectors in the union of the frequency domain basis vectors associated with all transmission layers of all CSIs;

[0247] 3) The length of the third non-zero coefficient is related to the number of basis vectors in the union of the Doppler domain basis vectors associated with all transport layers of all CSIs.

[0248] The union of the basis vectors of the target domain (spatial domain, frequency domain, or Doppler domain) represents a set of basis vectors of the target domain. Each basis vector in the set is different, that is, the same basis vectors are counted as 1 in the union.

[0249] Optionally, there may be a union of one target domain basis vectors, with all transport layers of all CSIs associated with a union.

[0250] Optionally, the combination of which features or features constitutes a union can be indicated by the network-side device via higher-layer signaling.

[0251] Alternatively, there may be a partial subsequence or partial bit in the third non-zero coefficient indicator that is associated with all transport layers of multiple CSIs, meaning that at least one of the following characteristics may occur:

[0252] 1) Associated spatial basis vectors share the same third non-zero coefficient indicator part;

[0253] 2) Associated frequency domain basis vectors share the same third non-zero coefficient indicator portion;

[0254] 3) The same Doppler domain basis vectors associated with the same third non-zero coefficient indicator part;

[0255] 4) The third non-zero coefficient indicating the part of the basis vectors in the same spatial domain with the same polarization direction;

[0256] 5) The third non-zero coefficient indicator part that is associated with the same polarization direction and the same frequency domain basis vector;

[0257] 6) The third non-zero coefficients of the same polarization direction and the same Doppler domain basis vectors are associated with the same indication part.

[0258] Optionally, the third non-zero coefficient indicator part, which has that feature or combination of features associated with the same feature, can be indicated by the network-side device via higher-layer signaling.

[0259] In one implementation, where at least one PMI feedback quantity is shared among at least some of the target CSIs, the CSI report also includes at least one of the following:

[0260] (1) Target base vector indication;

[0261] (2) Target phase offset indication.

[0262] Optionally, the target base vector indicator is used to indicate at least one base vector, which is used to compress the at least one PMI feedback quantity associated with at least a portion of the target CSI to obtain a shared at least one PMI feedback quantity. That is, the at least one base vector indicated by the target base vector indicator is used to compress the at least one PMI feedback quantity associated with multiple CSIs to obtain a shared at least one PMI feedback quantity.

[0263] Optionally, the target base vector indication is associated with at least a portion of the target CSI, all transport layers are associated with the same target base vector indication, or each transport layer is associated with a target base vector indication independently.

[0264] In one implementation, for all coefficients associated with multiple target CSIs, a DFT transformation is used to further compress all coefficients, and a shared non-zero coefficient indication is fed back to the compressed coefficients.

[0265] For example, consider two target CSIs. The coefficient matrix associated with the first layer of the first CSI is W11, with a dimension of 2LM*1 (2LM rows, 1 column). The coefficient matrix associated with the first layer of the second CSI is W21, also with a dimension of 2LM*1 (2LM rows, 1 column). Using DFT indices, W11 and W21 are compressed, resulting in a compressed coefficient matrix W31 = [W11, W21] * Wdft (where Wdft is a 2*2 DFT matrix). For W31, the terminal selects a portion of the column vectors. For each selected column vector, the terminal provides an indication of its associated target basis vector, which is used by the network-side device to recover the coefficient matrix associated with the first layer of each CSI. For the selected column vector, the terminal further provides an indication of its associated non-zero coefficients, which are associated with both target CSIs. This effectively reduces the overhead of non-zero coefficient indications. The method for other layers of two target CSIs is similar to the first layer described above. Optionally, specifically, in the case of multiple transport layers, the column vectors of the selected DFT matrix are shared by all layers.

[0266] Another implementation involves, for multiple target CSIs associated with basis vectors, the terminal feedback minimizes the union of the basis vectors formed by the feedback target basis vector indications. This minimizes the overhead of the second non-zero coefficient indication shared by multiple target CSIs.

[0267] For example, consider two target CSIs. The spatial basis vector indices associated with the first layer of the first CSI are 0, 1, and 2, while those associated with the first layer of the second CSI are 1, 2, and 3. When the terminal sends out a target basis vector indication, the presence of this indication causes the spatial basis vector indices associated with the first layer of the second CSI to be 0, 1, and 2. The union of the basis vectors associated with the first layers of the two CSIs is now 0, 1, and 2, not 0, 1, 2, and 3. Furthermore, because the union is smaller, the overhead of the second non-zero coefficient indication is also reduced.

[0268] Alternatively, the target basis vector indicator may be associated with at least one Discrete Fourier Transform (DFT) basis vector, that is, the at least one basis vector may be a DFT basis vector.

[0269] Optionally, the target phase offset indicator is used to indicate at least one phase offset, which is used to compress the at least one PMI feedback quantity associated with at least a portion of the target CSI to obtain a shared at least one PMI feedback quantity. That is, the at least one phase offset indicated by the target phase offset indicator is used to compress the at least one PMI feedback quantity associated with multiple target CSIs to obtain a shared at least one PMI feedback quantity.

[0270] Optionally, the target phase offset indication is associated with at least a portion of the target CSI, all transport layers are associated with the same target phase offset indication, or each transport layer is independently associated with a target phase offset indication.

[0271] One implementation involves the terminal, for multiple target CSI associated basis vectors, feeding back target phase offset indications to minimize the union of the basis vectors formed by the basis vectors associated with the multiple target CSIs. This minimizes the overhead of the second non-zero coefficient indication shared by the multiple target CSIs.

[0272] For example, consider two target CSIs. The spatial basis vector indices associated with the first layer of the first CSI are 0, 1, and 2, while those associated with the first layer of the second CSI are 1, 2, and 3. The terminal then feeds back a target phase offset indication. From this indication, the terminal obtains a phase offset indication vector or matrix. Based on this vector or matrix, the spatial basis vector indices associated with the first layer of the second CSI fed back by the terminal are set to 0, 1, and 2. In this case, the union of the basis vectors associated with the first layers of the two CSIs is 0, 1, and 2, instead of 0, 1, 2, and 3. Furthermore, because the union is smaller, the overhead of the second non-zero coefficient indication is also reduced.

[0273] Optionally, the target basis vector indicates the association with at least one quantized phase offset.

[0274] The technical solutions provided in the embodiments of this application can effectively reduce CSI feedback overhead, improve the success rate of CSI report feedback, and thus improve data transmission efficiency.

[0275] Figure 8 This diagram illustrates a flowchart of a method for obtaining channel state information according to an embodiment of this application. This method 800 can be executed by a network-side device. In other words, the method can be executed by software or hardware installed on the network-side device. Figure 8 As shown, the method may include the following steps.

[0276] S810, the network-side device configures CSI-RS configuration information for the terminal.

[0277] The CSI-RS configuration information includes multiple CSI-RSs, which are divided into multiple CSI-RS groups according to higher-layer signaling or default rules. A first CSI-RS group in the multiple CSI-RS groups is used to instruct the terminal to measure the first CSI-RS group. Based on the measurement results, at least one first CSI-RS in the first CSI-RS group is selected, and at least one CSI is obtained by measuring at least one second CSI-RS in the second CSI-RS group associated with the first CSI-RS. The second CSI-RS group is a CSI-RS group other than the first CSI-RS group in the multiple CSI-RS groups.

[0278] In one implementation, the plurality of CSI-RSs satisfy at least one of the following:

[0279] (1) The number of CSI-RS ports associated with multiple CSI-RS are not exactly the same;

[0280] (2) The number of CSI-RS configured is related to the number of CSI-RS ports configured that are less than the preset value;

[0281] (3) The number of CSI-RS configured is related to the number of CSI-RS associated with the N time slots before the predetermined time, where N is a positive integer;

[0282] (4) The configured CSI-RS is associated with multiple time slots, and the time slot interval between two adjacent CSI-RS or CSI-RS groups is configured by the network.

[0283] S812, the network-side device receives at least one CSI from the terminal based on the CSI-RS configuration.

[0284] The terminal can acquire and report the at least one CSI in accordance with the above method 200. For details, please refer to the relevant description in the above method 200, which will not be repeated here.

[0285] By dividing multiple CSI-RS into multiple groups, the number of CSI-RS for UE beam training and CSI feedback measurements can be reduced through the method provided in the embodiments of this application. In addition, compared with the need to perform UE beam training and CSI feedback separately, the technical solution provided in the embodiments of this application can also reduce the latency of UE beam training and CSI feedback.

[0286] Figure 9This diagram illustrates a flowchart of a method for obtaining channel state information reports according to an embodiment of this application. This method 900 can be executed by a network-side device. In other words, the method can be executed by software or hardware installed on the network-side device. Figure 9 As shown, the method may include the following steps.

[0287] S910, the network-side device receives CSI reports from the terminal.

[0288] In this embodiment of the application, the CSI report includes at least one target CSI from the at least one CSI, and the at least one target CSI satisfies at least one of the following:

[0289] (1) At least some of the at least one target CSIs share at least one PMI feedback quantity;

[0290] (2) In the case that one of the at least one target CSI is associated with multiple transport layers, the multiple transport layers share a first non-zero coefficient indication.

[0291] In practical applications, the terminal can report the CSI report to the network-side device according to the above method 300, as described in the method 300, which will not be repeated here.

[0292] Additionally, it should be noted that method 900 is a method executed by the network-side device corresponding to method 300. Therefore, in the following embodiments, the various implementation methods of the network-side device are mainly described, and other matters not covered can be referred to the relevant descriptions in method 300.

[0293] In one implementation, after S910, the method may further include the following:

[0294] The network-side device obtains at least one of the following based on the shared at least one PMI feedback quantity or the shared first non-zero coefficient indication in the CSI report:

[0295] (1) The non-zero coefficients associated with each of the target CSIs;

[0296] (2) Non-zero coefficients associated with each transport layer of each of the target CSIs;

[0297] (3) The PMI feedback quantity associated with each of the target CSIs.

[0298] In one implementation, after S910, the method may further include:

[0299] Where at least one PMI feedback quantity is shared among at least some of the target CSIs, the network-side device determines the length of the second non-zero coefficient indication in the CSI report based on at least one of the following:

[0300] (1) The maximum value of the rank values ​​of at least some of the target CSIs;

[0301] (2) The rank value of at least a portion of the target CSI;

[0302] (3) The number of spatial basis vectors in the union of the spatial basis vectors associated with at least some of the target CSIs;

[0303] (4) The number of frequency domain basis vectors in the union of the frequency domain basis vectors associated with at least some of the target CSIs;

[0304] (5) The number of Doppler basis vectors in the union of the Doppler domain basis vectors associated with at least some of the target CSIs.

[0305] In the above implementation, if at least one PMI feedback quantity is shared among at least some of the target CSIs, and the at least one PMI feedback quantity includes a second non-zero coefficient indication, the network-side device can determine the length of the second non-zero coefficient indication (i.e., the shared non-zero coefficient indication) in the CSI report based on at least one of (1) to (5) above, thereby obtaining the second non-zero coefficient indication in the CSI report.

[0306] In one implementation, the CSI report may also include at least one of the following:

[0307] (1) First indication information, used to indicate the number of spatial basis vectors in the union of the spatial basis vectors associated with at least some of the target CSIs;

[0308] (2) Second indication information, used to indicate the number of frequency domain basis vectors in the union of the frequency domain basis vectors associated with at least some of the target CSIs;

[0309] (3) Third indication information, for the number of Doppler basis vectors in the union set of the Doppler domain basis vectors associated with at least part of the target CSI.

[0310] In the above implementation, the network-side device can determine at least one of the following based on at least one of the first indication information, the second indication information, and the third indication information: the number of spatial basis vectors in the union of the spatial basis vectors associated with at least a portion of the target CSI, the number of frequency basis vectors in the union of the frequency basis vectors associated with at least a portion of the target CSI, and the number of Doppler basis vectors in the union of the Doppler basis vectors associated with at least a portion of the target CSI, and then determine the length of the second non-zero coefficient indication in the CSI report.

[0311] Optionally, the first indication information is used to indicate a first quantity, wherein the number of spatial basis vectors in the union of the spatial basis vectors associated with at least some of the target CSIs is the difference between the total number of spatial basis vectors associated with at least some of the target CSIs and the first quantity; the second indication information is used to indicate a second quantity, wherein the number of frequency basis vectors in the union of the frequency basis vectors associated with at least some of the target CSIs is the difference between the total number of frequency basis vectors associated with at least some of the target CSIs and the second quantity; and the third indication information is used to indicate a third quantity, wherein the number of Doppler basis vectors in the union of the Doppler basis vectors associated with at least some of the target CSIs is the difference between the total number of Doppler basis vectors associated with at least some of the target CSIs and the third quantity.

[0312] Through the above optional implementation, the first indication information is used to indicate the difference between the total number of spatial basis vectors associated with at least some of the target CSIs and the number of spatial basis vectors in the union of the spatial basis vectors associated with at least some of the target CSIs. This can reduce the overhead of feeding back the first indication information when the number of spatial basis vectors in the union of the spatial basis vectors associated with at least some of the target CSIs is large. Similarly, the overhead of feeding back the second and third indication information can also be reduced, thereby reducing the feedback overhead of CSI reports.

[0313] In one implementation, the network-side device configures at least one candidate layer association indication via higher-layer signaling, wherein the candidate layer association indication is used to indicate the candidate correspondence of layers among the at least some target CSIs. In this implementation, the network-side device can configure at least one candidate layer association indication via higher-layer signaling, and the terminal selects one of the target layer association indications based on the configured candidate layer association indications to determine the shared at least one PMI feedback quantity, further forming a corresponding CSI report and feeding it back. Optionally, the network-side device can instruct the terminal to feed back multiple target layer association indications via higher-layer signaling, and for each target layer association indication, the terminal determines the shared at least one PMI feedback quantity.

[0314] In one implementation, the CSI report further includes at least one target layer association indicator, wherein the target layer association indicator is used to indicate the layer correspondence between the at least some target CSIs. Through the at least one target layer association indicator, the network-side device can obtain which layers of the at least some target CSIs share at least one PMI feedback quantity, thereby enabling the network-side device to obtain the layer association relationship between each target CSI based on the target layer association indicator.

[0315] Optionally, after the network-side device receives the CSI report reported by the terminal, the method may further include the following steps:

[0316] Step 1: The network-side device determines the layer correspondence between at least some of the target CSIs based on the target layer association indication;

[0317] Step 2: The network-side device determines the layer of each of the target CSIs that shares the at least one PMI feedback quantity based on the layer correspondence between the at least some target CSIs.

[0318] For example, in Table 3 above, if the terminal feeds back 3 LI indications to CSI1 layer2, CSI2 layer1, and CSI3 layer3 respectively, the PMI overhead is minimized. Then, the network-side device rearranges Table 3 according to the LI indications to obtain Table 4 or Table 5, and determines that each row in Table 4 or Table 5 is a layer association indication, which can share at least one PMI feedback quantity.

[0319] In one implementation, after the network-side device receives the CSI report reported by the terminal, the method may further include:

[0320] In the case where a first non-zero coefficient indication is shared among multiple transport layers associated with a target CSI, the network-side device determines the length of the first non-zero coefficient indication in the CSI report based on at least one of the following:

[0321] The number of spatial basis vectors in the union of the spatial basis vectors associated with the multiple transport layers of the target CSI;

[0322] The number of frequency domain basis vectors in the union of the frequency domain basis vectors associated with the multiple transport layers of the target CSI;

[0323] The number of Doppler basis vectors in the union of the multiple transport layer associated Doppler domain basis vectors of the target CSI.

[0324] Optionally, if each of the at least some of the target CSIs is associated with at least one transport layer, a third non-zero coefficient indication is shared among all the transport layers of the at least some of the target CSIs.

[0325] Optionally, after the network-side device receives the CSI report reported by the terminal, the method further includes:

[0326] The network-side device determines the length of the third non-zero coefficient indication in the CSI report based on at least one of the following:

[0327] The number of spatial basis vectors in the union of all transport layer associated spatial basis vectors of at least some of the target CSI;

[0328] The number of frequency domain basis vectors in the union of all transport layer associated frequency domain basis vectors of at least some of the target CSI;

[0329] The number of Doppler basis vectors in the union of all transport layer-associated Doppler domain basis vectors of at least some of the target CSIs.

[0330] In one implementation, where at least one PMI feedback quantity is shared among at least some of the target CSIs, the CSI report also includes at least one of the following:

[0331] (1) Target base vector indication; the target base vector indication is used to indicate at least one base vector for recovering the at least one PMI feedback quantity associated with each target CSI based on the shared at least one PMI feedback quantity.

[0332] Optionally, the target base vector indication may be associated with multiple target CSIs, with all transport layers associated with the same target base vector indication, or each transport layer may be associated with a target base vector indication independently.

[0333] Optionally, the target basis vector indicator may be associated with at least one DFT basis vector.

[0334] (2) Target phase offset indication. The target phase offset indication is used to indicate at least one phase offset for recovering the at least one PMI feedback quantity associated with each target CSI based on the shared at least one PMI feedback quantity.

[0335] Optionally, the target phase offset indication may be associated with multiple target CSIs, with all transport layers associated with the same target phase offset indication, or each transport layer may be associated with a target phase offset indication independently.

[0336] Optionally, the target basis vector indication may be associated with at least one quantized phase offset.

[0337] In one implementation, before the network-side device receives the CSI report reported by the terminal, the method may further include:

[0338] The network-side device configures multiple CSI-RS for the terminal. The multiple CSI-RS are divided into multiple CSI-RS groups according to higher-layer signaling or default rules. A first CSI-RS group in the multiple CSI-RS groups is used to instruct the terminal to measure the first CSI-RS group. Based on the measurement results, at least one first CSI-RS in the first CSI-RS group is selected. At least one CSI is obtained by measuring at least one second CSI-RS in the second CSI-RS group associated with the first CSI-RS. The second CSI-RS group is a CSI-RS group other than the first CSI-RS group in the multiple CSI-RS groups.

[0339] Optionally, the plurality of CSI-RSs satisfy at least one of the following:

[0340] The number of CSI-RS ports associated with multiple CSI-RS are not exactly the same;

[0341] The number of configured CSI-RS is related to the number of CSI-RS ports configured that are less than the preset value;

[0342] The number of CSI-RS configured is related to the number of CSI-RS associated with N time slots prior to the predetermined time, where N is a positive integer;

[0343] The configured CSI-RS is associated with multiple time slots, and the time slot interval between two adjacent CSI-RS or CSI-RS groups is configured by the network.

[0344] By implementing the above method, dividing multiple CSI-RS into multiple groups can reduce the number of CSI-RS for UE beam training and CSI feedback measurements, and also reduce the latency of UE beam training and CSI feedback.

[0345] The channel state information reporting method provided in this application can be executed by a channel state information reporting device. This application uses the example of a channel state information reporting device executing the channel state information reporting method to illustrate the channel state information reporting device provided in this application.

[0346] Figure 10 This illustration shows a structural diagram of a channel state information reporting device provided in an embodiment of this application, such as... Figure 10 As shown, the device 1000 mainly includes: a first acquisition module 1001 and a reporting module 1002.

[0347] In this embodiment of the application, the first acquisition module 1001 is used to acquire at least one Channel State Information (CSI).

[0348] Reporting module 1002 is used to report a CSI report based on the acquired at least one CSI;

[0349] The CSI report includes at least one target CSI from the at least one CSI, wherein the at least one target CSI satisfies at least one of the following:

[0350] At least some of the at least one target CSIs share at least one precoding matrix indicating the PMI feedback amount;

[0351] In the case where one of the at least one target CSIs is associated with multiple transport layers, the multiple transport layers share a first non-zero coefficient indication.

[0352] In one implementation, when the at least one PMI feedback quantity includes a second non-zero coefficient indication, the at least partial target CSI satisfies at least one of the following:

[0353] The same spatial basis vectors are associated with the same second non-zero coefficient indicator part;

[0354] The same frequency domain basis vectors are associated with the same second non-zero coefficient indicator portion;

[0355] The same Doppler domain basis vectors are associated with the same second non-zero coefficient indicator portion;

[0356] The second non-zero coefficient indicating the part of the basis vectors in the same polarization direction and spatial domain is associated with the same basis vector.

[0357] The second non-zero coefficients indicating the same polarization direction and the same frequency domain basis vectors are associated with the same basis vectors.

[0358] The second non-zero coefficients indicating the same polarization direction and the same Doppler domain basis vectors are associated with the same part.

[0359] In one implementation, the length of the second non-zero coefficient indicator is determined according to at least one of the following:

[0360] The maximum value among the rank values ​​of at least some of the target CSIs;

[0361] The rank value of at least a portion of the target CSI;

[0362] The number of spatial basis vectors in the union of the spatial basis vectors associated with at least some of the target CSIs;

[0363] The number of frequency domain basis vectors in the union of the frequency domain basis vectors associated with at least some of the target CSIs;

[0364] The number of Doppler basis vectors in the union of the Doppler domain basis vectors associated with at least some of the target CSIs.

[0365] In one implementation, the CSI report also includes at least one of the following:

[0366] The first indication information is used to indicate the number of spatial basis vectors in the union of the spatial basis vectors associated with at least some of the target CSIs;

[0367] The second indication information is used to indicate the number of frequency domain basis vectors in the union of the frequency domain basis vectors associated with at least a portion of the target CSI;

[0368] The third indication information is the number of Doppler basis vectors in the union set of the Doppler domain basis vectors associated with at least a portion of the target CSI.

[0369] In one implementation, the first indication information is used to indicate a first quantity, wherein the number of spatial basis vectors in the union of the spatial basis vectors associated with the at least part of the target CSI is the difference between the total number of spatial basis vectors associated with the at least part of the target CSI and the first quantity.

[0370] The second indication information is used to indicate a second quantity, wherein the number of frequency domain basis vectors in the union of the frequency domain basis vectors associated with at least some of the target CSIs is the difference between the total number of frequency domain basis vectors associated with at least some of the target CSIs and the second quantity;

[0371] The third indication information is used to indicate a third quantity, wherein the number of Doppler domain basis vectors in the union of the Doppler domain basis vectors associated with at least some of the target CSIs is the difference between the total number of Doppler domain basis vectors associated with at least some of the target CSIs and the third quantity.

[0372] In one implementation, the at least part of the target CSI satisfies one of the following:

[0373] At least some of the target CSIs are associated with different rank values;

[0374] The at least some of the target CSIs are associated with the same rank value.

[0375] In one implementation, the CSI report further includes: at least one target layer association indicator, wherein the target layer association indicator is used to indicate the layer correspondence between the at least some target CSIs.

[0376] In one implementation, the at least one target layer association indication is obtained in the following manner:

[0377] Obtain at least one candidate layer association indication configured on the network-side device;

[0378] Based on the at least partial target CSI, select the at least one target layer association indication from the at least one candidate layer association indication.

[0379] In one implementation, when a first non-zero coefficient indication is shared among multiple transport layers associated with a target CSI, the multiple transport layers satisfy at least one of the following:

[0380] The same spatial basis vectors are associated with the same first non-zero coefficient indicator part;

[0381] The same frequency domain basis vectors are associated with the same first non-zero coefficient indicator portion;

[0382] The same Doppler domain basis vectors are associated with the same first non-zero coefficient indicator portion;

[0383] The first non-zero coefficient indicating the part of the basis vectors in the same polarization direction and spatial domain are associated with the same basis vectors.

[0384] The first non-zero coefficient indicating part that has the same polarization direction and the same frequency domain basis vector is associated with the same basis vector;

[0385] The first non-zero coefficients indicating the same polarization direction and the same Doppler domain basis vectors are associated with the same polarization direction.

[0386] In one implementation, the length of the first non-zero coefficient indicator is determined according to at least one of the following:

[0387] The number of spatial basis vectors in the union of the spatial basis vectors associated with the multiple transport layers of the target CSI;

[0388] The number of frequency domain basis vectors in the union of the frequency domain basis vectors associated with the multiple transport layers of the target CSI;

[0389] The number of Doppler basis vectors in the union of the multiple transport layer associated Doppler domain basis vectors of the target CSI.

[0390] In one implementation, where each of the at least some of the target CSIs is associated with at least one transport layer, a third non-zero coefficient indication is shared among all transport layers of the at least some of the target CSIs.

[0391] In one implementation, all transport layers of the at least partial target CSI satisfy at least one of the following:

[0392] The same spatial basis vectors are associated with the same third non-zero coefficient indicator part;

[0393] The same frequency domain basis vectors are associated with the same third non-zero coefficient indicator part;

[0394] The same Doppler domain basis vectors are associated with the same third non-zero coefficient indicating part;

[0395] The third non-zero coefficient indicating the part of the basis vectors in the same polarization direction and spatial domain is associated with the same basis vector.

[0396] The third non-zero coefficient indicating part that has the same polarization direction and the same frequency domain basis vector;

[0397] The third non-zero coefficients indicating the same polarization direction and the same Doppler domain basis vectors are associated with the same part.

[0398] In one implementation, the length of the third non-zero coefficient indicator is determined according to at least one of the following:

[0399] The number of spatial basis vectors in the union of all transport layer associated spatial basis vectors of at least some of the target CSI;

[0400] The number of frequency domain basis vectors in the union of all transport layer associated frequency domain basis vectors of at least some of the target CSI;

[0401] The number of Doppler basis vectors in the union of all transport layer-associated Doppler domain basis vectors of at least some of the target CSIs.

[0402] In one implementation, where at least one PMI feedback quantity is shared among at least some of the target CSIs, the CSI report also includes at least one of the following:

[0403] Target base vector indication;

[0404] Target phase offset indication.

[0405] In one implementation, the target base vector indicator is used to indicate at least one base vector, which is used to compress the at least one PMI feedback quantity associated with the at least partial target CSI to obtain the shared at least one PMI feedback quantity.

[0406] In one implementation, the target phase offset indicator is used to indicate at least one phase offset, the at least one phase offset being used to compress the at least one PMI feedback quantity associated with the at least partial target CSI to obtain the shared at least one PMI feedback quantity.

[0407] In one implementation, the first acquisition module 1001 acquires at least one Channel State Information (CSI), including:

[0408] The at least one CSI is obtained by measuring multiple Channel State Information Reference Signals (CSI-RS) configured on the network-side equipment; wherein the multiple CSI-RS are divided into multiple CSI-RS groups according to higher-layer signaling or default rules.

[0409] In one implementation, the at least one CSI is obtained by measuring multiple Channel State Information Reference Signals (CSI-RS) configured by the network-side device, including:

[0410] Measure the first CSI-RS group, and select at least one first CSI-RS from the first CSI-RS group based on the measurement results, wherein the first CSI-RS group is one of the plurality of CSI-RS groups;

[0411] For any of the first CSI-RS, obtain the second CSI-RS group associated with the first CSI-RS, wherein the second CSI-RS group is a CSI-RS group other than the first CSI-RS group among the plurality of CSI-RS groups;

[0412] The at least one CSI is obtained by measuring at least one second CSI-RS in the second CSI-RS group.

[0413] The channel state information reporting device in this embodiment can be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal, or other devices besides a terminal. For example, the terminal can include, but is not limited to, the type of terminal 11 listed above; other devices can be servers, network attached storage (NAS), etc., and this embodiment does not impose specific limitations.

[0414] The channel state information reporting device provided in this application embodiment can achieve... Figures 2 to 7 The various processes implemented in the terminal of the method embodiment achieve the same technical effect, and will not be described again here to avoid repetition.

[0415] Figure 11 This illustration shows a schematic diagram of a channel state information report acquisition device provided in an embodiment of this application, such as... Figure 11 As shown, the device 1100 mainly includes: a receiving module 1101 and a second acquisition module 1102.

[0416] In this embodiment of the application, the receiving module 1101 is configured to receive a CSI report reported by the terminal, wherein the CSI report includes at least one target CSI among the at least one CSI, and the at least one target CSI satisfies at least one of the following:

[0417] At least some of the at least one target CSIs share at least one precoding matrix indicating the PMI feedback amount;

[0418] In the case where one of the at least one target CSIs is associated with multiple transport layers, the multiple transport layers share a first non-zero coefficient indication;

[0419] The second acquisition module 1102 is used to acquire the at least one target CSI based on the CSI report.

[0420] In one implementation, the second acquisition module 1102 is further configured to acquire at least one of the following based on the shared at least one PMI feedback quantity or the shared first non-zero coefficient indication in the CSI report:

[0421] The non-zero coefficients associated with each of the aforementioned target CSIs indicate this.

[0422] The non-zero coefficients associated with each transport layer of each of the target CSIs;

[0423] The PMI feedback quantity associated with each of the aforementioned target CSIs.

[0424] In one implementation, the second acquisition module 1102 is further configured to determine the length of the second non-zero coefficient indication in the CSI report based on at least one of the following:

[0425] The maximum value among the rank values ​​of at least some of the target CSIs;

[0426] The rank value of at least a portion of the target CSI;

[0427] The number of spatial basis vectors in the union of the spatial basis vectors associated with at least some of the target CSIs;

[0428] The number of frequency domain basis vectors in the union of the frequency domain basis vectors associated with at least some of the target CSIs;

[0429] The number of Doppler basis vectors in the union of the Doppler domain basis vectors associated with at least some of the target CSIs.

[0430] In one implementation, the CSI report also includes at least one of the following:

[0431] The first indication information is used to indicate the number of spatial basis vectors in the union of the spatial basis vectors associated with at least some of the target CSIs;

[0432] The second indication information is used to indicate the number of frequency domain basis vectors in the union of the frequency domain basis vectors associated with at least a portion of the target CSI;

[0433] The third indication information is the number of Doppler basis vectors in the union set of the Doppler domain basis vectors associated with at least a portion of the target CSI.

[0434] In one implementation, the first indication information is used to indicate a first quantity, wherein the number of spatial basis vectors in the union of the spatial basis vectors associated with the at least part of the target CSI is the difference between the total number of spatial basis vectors associated with the at least part of the target CSI and the first quantity.

[0435] The second indication information is used to indicate a second quantity, wherein the number of frequency domain basis vectors in the union of the frequency domain basis vectors associated with at least some of the target CSIs is the difference between the total number of frequency domain basis vectors associated with at least some of the target CSIs and the second quantity;

[0436] The third indication information is used to indicate a third quantity, wherein the number of Doppler domain basis vectors in the union of the Doppler domain basis vectors associated with at least some of the target CSIs is the difference between the total number of Doppler domain basis vectors associated with at least some of the target CSIs and the third quantity.

[0437] In one implementation, the system further includes a configuration module for configuring at least one candidate layer association indication via higher-layer signaling, wherein the candidate layer association indication is used to indicate a candidate correspondence between layers among the at least some target CSIs.

[0438] In one implementation, the CSI report further includes: at least one target layer association indicator, wherein the target layer association indicator is used to indicate the layer correspondence between the at least some target CSIs.

[0439] In one implementation, the second acquisition module 1102 is further used for:

[0440] Based on the target layer association indication, determine the layer correspondence between at least some of the target CSIs;

[0441] Based on the layer correspondence between the at least some target CSIs, the layers of each of the target CSIs that share the at least one PMI feedback quantity are determined.

[0442] In one implementation, the second acquisition module 1102 is further configured to determine the length of the first non-zero coefficient indication in the CSI report according to at least one of the following, in the case where the first non-zero coefficient indication is shared among multiple transport layers associated with a target CSI:

[0443] The number of spatial basis vectors in the union of the spatial basis vectors associated with the multiple transport layers of the target CSI;

[0444] The number of frequency domain basis vectors in the union of the frequency domain basis vectors associated with the multiple transport layers of the target CSI;

[0445] The number of Doppler basis vectors in the union of the multiple transport layer associated Doppler domain basis vectors of the target CSI.

[0446] In one implementation, where each of the at least some of the target CSIs is associated with at least one transport layer, a third non-zero coefficient indication is shared among all transport layers of the at least some of the target CSIs.

[0447] In one implementation, the second acquisition module 1102 is further configured to determine the length of the third non-zero coefficient indication in the CSI report based on at least one of the following:

[0448] The number of spatial basis vectors in the union of all transport layer associated spatial basis vectors of at least some of the target CSI;

[0449] The number of frequency domain basis vectors in the union of all transport layer associated frequency domain basis vectors of at least some of the target CSI;

[0450] The number of Doppler basis vectors in the union of all transport layer-associated Doppler domain basis vectors of at least some of the target CSIs.

[0451] In one implementation, where at least one PMI feedback quantity is shared among at least some of the target CSIs, the CSI report also includes at least one of the following:

[0452] Target base vector indication;

[0453] Target phase offset indication.

[0454] In one implementation, the system further includes a configuration module for configuring multiple CSI-RS for the terminal. The multiple CSI-RS are divided into multiple CSI-RS groups according to higher-layer signaling or default rules. A first CSI-RS group within the multiple CSI-RS groups is used to instruct the terminal to measure the first CSI-RS group. Based on the measurement results, at least one first CSI-RS in the first CSI-RS group is selected. At least one CSI is obtained by measuring at least one second CSI-RS in a second CSI-RS group associated with the first CSI-RS. The second CSI-RS group is any CSI-RS group other than the first CSI-RS group among the multiple CSI-RS groups.

[0455] In one implementation, the plurality of CSI-RSs satisfy at least one of the following:

[0456] The number of CSI-RS ports associated with multiple CSI-RS are not exactly the same;

[0457] The number of configured CSI-RS is related to the number of CSI-RS ports configured that are less than the preset value;

[0458] The number of CSI-RS configured is related to the number of CSI-RS associated with N time slots prior to the predetermined time, where N is a positive integer;

[0459] The configured CSI-RS is associated with multiple time slots, and the time slot interval between two adjacent CSI-RS or CSI-RS groups is configured by the network.

[0460] The channel state information report acquisition device provided in this application embodiment can achieve Figures 8 to 9 The various processes implemented by the network-side device in the method embodiment achieve the same technical effect, and will not be described again here to avoid repetition.

[0461] like Figure 12 As shown, this application embodiment also provides a communication device 1200, including a processor 1201 and a memory 1202. The memory 1202 stores a program or instructions that can run on the processor 1201. For example, when the communication device 1200 is a terminal, when the program or instructions are executed by the processor 1201, they implement the various steps of the above-described method 200 or method 300 embodiments and achieve the same technical effect. When the communication device 1200 is a network-side device, when the program or instructions are executed by the processor 1201, they implement the various steps of the above-described method 800 or method 900 embodiments and achieve the same technical effect. To avoid repetition, further details are omitted here.

[0462] This application embodiment 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 programs or instructions to implement, for example... Figure 2 or Figure 3 The steps in the method embodiment shown are illustrated. This terminal embodiment corresponds to the above-described terminal-side method embodiment. All implementation processes and methods of the above-described method embodiments can be applied to this terminal embodiment and achieve the same technical effect. Specifically, Figure 13 A schematic diagram of the hardware structure of a terminal to implement an embodiment of this application.

[0463] The terminal 1300 includes, but is not limited to, at least some of the following components: radio frequency unit 1301, network module 1302, audio output unit 1303, input unit 1304, sensor 1305, display unit 1306, user input unit 1307, interface unit 1308, memory 1309, and processor 1310.

[0464] Those skilled in the art will understand that the terminal 1300 may also include a power supply (such as a battery) for supplying power to various components. The power supply may be logically connected to the processor 1310 through a power management system, thereby enabling functions such as managing charging, discharging, and power consumption through the power management system. Figure 13 The terminal structure shown does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0465] It should be understood that, in this embodiment, the input unit 1304 may include a graphics processing unit (GPU) 13041 and a microphone 13042. The GPU 13041 processes image data of still images or videos obtained by an image capture device (such as a camera) in video capture mode or image capture mode. The display unit 1306 may include a display panel 13061, which may be configured in the form of a liquid crystal display, an organic light-emitting diode, etc. The user input unit 1307 includes a touch panel 13071 and at least one of other input devices 13072. The touch panel 13071 is also called a touch screen. The touch panel 13071 may include a touch detection device and a touch controller. Other input devices 13072 may include, but are not limited to, physical keyboards, function keys (such as volume control buttons, power buttons, etc.), trackballs, mice, and joysticks, which will not be described in detail here.

[0466] In this embodiment, after receiving downlink data from the network-side device, the radio frequency unit 1301 can transmit it to the processor 1310 for processing; in addition, the radio frequency unit 1301 can send uplink data to the network-side device. Typically, the radio frequency unit 1301 includes, but is not limited to, antennas, amplifiers, transceivers, couplers, low-noise amplifiers, duplexers, etc.

[0467] The memory 1309 can be used to store software programs or instructions, as well as various data. The memory 1309 may primarily include a first storage area for storing programs or instructions and a second storage area for storing data. The first storage area may store the operating system, application programs or instructions required for at least one function (such as sound playback, image playback, etc.). Furthermore, the memory 1309 may include volatile memory or non-volatile memory. The non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory can be random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct memory bus RAM (DRRAM). The memory 1309 in this embodiment includes, but is not limited to, these and any other suitable types of memory.

[0468] Processor 1310 may include one or more processing units; optionally, processor 1310 integrates an application processor and a modem processor, wherein the application processor mainly handles operations involving the operating system, user interface, and applications, and the modem processor mainly handles wireless communication signals, such as a baseband processor. It is understood that the aforementioned modem processor may also not be integrated into processor 1310.

[0469] The processor 1310 is used to acquire at least one CSI;

[0470] Radio frequency unit 1301 is used to report a CSI report based on the acquired at least one CSI;

[0471] The CSI report includes at least one target CSI from the at least one CSI, wherein the at least one target CSI satisfies at least one of the following:

[0472] At least some of the at least one target CSIs share at least one precoding matrix indicating the PMI feedback amount;

[0473] In the case where one of the at least one target CSIs is associated with multiple transport layers, the multiple transport layers share a first non-zero coefficient indication.

[0474] It is understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of method embodiment 200 or 300 and achieve the same or corresponding technical effects. To avoid repetition, it will not be described again here.

[0475] This application embodiment 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 programs or instructions to implement, for example... Figure 8 or Figure 9 The steps of the method embodiment shown are illustrated. This network-side device embodiment corresponds to the above-described network-side device method embodiment. All implementation processes and methods of the above-described method embodiments can be applied to this network-side device embodiment and can achieve the same technical effect.

[0476] Specifically, embodiments of this application also provide a network-side device. For example... Figure 14 As shown, the network-side device 1400 includes: an antenna 1401, a radio frequency (RF) device 1402, a baseband device 1403, a processor 1404, and a memory 1405. The antenna 1401 is connected to the RF device 1402. In the uplink direction, the RF device 1402 receives information through the antenna 1401 and transmits the received information to the baseband device 1403 for processing. In the downlink direction, the baseband device 1403 processes the information to be transmitted and sends it to the RF device 1402. The RF device 1402 processes the received information and transmits it through the antenna 1401.

[0477] The method executed by the network-side device in the above embodiments can be implemented in the baseband device 1403, which includes a baseband processor.

[0478] The baseband device 1403 may include, for example, at least one baseband board on which multiple chips are disposed, such as... Figure 14As shown, one of the chips is, for example, a baseband processor, which is connected to the memory 1405 via a bus interface to call the program in the memory 1405 and execute the network device operation shown in the above method embodiment.

[0479] The network-side device may also include a network interface 1406, such as a Common Public Radio Interface (CPRI).

[0480] Specifically, the network-side device 1400 in this application embodiment further includes: instructions or programs stored in memory 1405 and executable on processor 1404, wherein processor 1404 calls the instructions or programs in memory 1405 to execute. Figure 11 The methods executed by each module shown achieve the same technical effect, and to avoid repetition, they will not be described in detail here.

[0481] This application also provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they implement the various processes of the above-described methods 200, 300, 800, or 900, and achieve the same technical effect. To avoid repetition, these will not be described again here.

[0482] The processor mentioned above is the processor in the terminal described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk. In some examples, the readable storage medium may be a non-transient readable storage medium.

[0483] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the above-described method embodiments 200, 300, 800 or 900, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0484] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0485] This application also provides a computer program / program product, which is stored in a storage medium and executed by at least one processor to implement the various processes of the above-described methods 200, 300, 800 or 900 embodiments, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0486] This application embodiment also provides a channel state information reporting system, including: a terminal and a network-side device, wherein the terminal can be used to perform the steps of the 200 or 300 method as described above, and the network-side device can be used to perform the steps of the 800 or 900 method as described above.

[0487] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0488] From the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of computer software products plus necessary general-purpose hardware platforms, and of course, they can also be implemented by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.) and includes several instructions to cause the terminal or network-side device to execute the methods described in the various embodiments of this application.

[0489] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other implementations under the guidance of this application without departing from the spirit and scope of the claims. All of these implementations are within the protection scope of this application.

Claims

1. A method for reporting a channel state information report, characterized in that: include: The terminal obtains at least one channel state information CSI; The terminal reports a CSI report based on the at least one CSI obtained; The CSI report includes at least one target CSI among the at least one CSI, and the at least one target CSI satisfies at least one of the following: At least one precoding matrix indication PMI feedback amount is shared between at least some of the at least one target CSI; In a case where one of the at least one target CSI is associated with multiple transmission layers, the first non-zero coefficient indication is shared among the multiple transmission layers.

2. The method according to claim 1, characterized in that In a case where the at least one PMI feedback amount includes a second non-zero coefficient indication, the at least part of the target CSI satisfies at least one of the following: The same spatial basis vector is associated with the same second non-zero coefficient indication part; The same frequency domain basis vector is associated with the same second non-zero coefficient indication portion; The same Doppler domain basis vector is associated with the same second non-zero coefficient indication portion; The same polarization direction and the same spatial basis vector are associated with the same second non-zero coefficient indication part; The same polarization direction and the same frequency domain basis vector are associated with the same second non-zero coefficient indication part; The same polarization direction and the same Doppler domain basis vector are associated with the same second non-zero coefficient indication part.

3. The method according to claim 1, characterized in that The length of the second non-zero coefficient indication is determined according to at least one of the following: a maximum value among the rank values ​​of at least part of the target CSI; a rank value of the at least part of the target CSI; the number of spatial basis vectors in the union of spatial basis vectors associated with at least part of the target CSI; the number of frequency domain basis vectors in the union of frequency domain basis vectors associated with at least part of the target CSI; The number of Doppler basis vectors in the union of Doppler domain basis vectors associated with at least part of the target CSI.

4. The method according to claim 3, characterized in that The CSI report also includes at least one of the following: The first indication information is used to indicate the number of spatial basis vectors in the union of spatial basis vectors associated with at least part of the target CSI; The second indication information is used to indicate the number of frequency domain basis vectors in the union of frequency domain basis vectors associated with at least part of the target CSI; The third indication information is used for the number of Doppler basis vectors in the union of Doppler domain basis vectors associated with at least part of the target CSI.

5. The method according to claim 4, characterized in that The first indication information is used to indicate a first number, and the number of spatial basis vectors in the union of the spatial basis vectors associated with at least part of the target CSI is the difference between the total number of spatial basis vectors associated with at least part of the target CSI and the first number; The second indication information is used to indicate a second number, and the number of frequency domain basis vectors in the union of frequency domain basis vectors associated with at least part of the target CSI is the difference between the total number of frequency domain basis vectors associated with at least part of the target CSI and the second number; The third indication information is used to indicate a third number, and the number of Doppler domain basis vectors in the union of Doppler domain basis vectors associated with at least part of the target CSI is the difference between the total number of Doppler domain basis vectors associated with at least part of the target CSI and the third number.

6. The method according to any one of claims 1 to 5, characterized in that: The at least part of the target CSI satisfies one of the following: The at least part of the target CSI is associated with different rank values; The at least part of the target CSI is associated with the same rank value.

7. The method according to any one of claims 1 to 5, characterized in that: The CSI report also includes: at least one target layer association indication, wherein the target layer association indication is used to indicate the corresponding relationship between the layers of at least part of the target CSI.

8. The method according to claim 7, characterized in that The terminal obtains the at least one target layer association indication in the following manner: The terminal obtains at least one candidate layer association indication configured by a network side device; The terminal selects the at least one target layer association indication from the at least one candidate layer association indication according to the at least part of the target CSI.

9. The method according to claim 1, characterized in that: In the case where the first non-zero coefficient indication is shared among multiple transmission layers associated with one of the target CSIs, the multiple transmission layers satisfy at least one of the following: The same spatial basis vector is associated with the same first non-zero coefficient indication part; The same frequency domain basis vector is associated with the same first non-zero coefficient indication part; The same Doppler domain basis vector is associated with the same first non-zero coefficient indication part; The same polarization direction and the same spatial basis vector are associated with the same first non-zero coefficient indication part; The same polarization direction and the same frequency domain basis vector are associated with the same first non-zero coefficient indication part; The same polarization direction and the same Doppler domain basis vector are associated with the same first non-zero coefficient indication part.

10. The method according to claim 9, characterized in that The length of the first non-zero coefficient indication is determined according to at least one of the following: The number of spatial basis vectors in the union of spatial basis vectors associated with multiple transmission layers of the target CSI; The number of frequency domain basis vectors in the union of frequency domain basis vectors associated with multiple transmission layers of the target CSI; The number of Doppler basis vectors in the union of Doppler domain basis vectors associated with multiple transmission layers of the target CSI.

11. The method according to claim 1, characterized in that: In the case that at least one of the at least part of the target CSI is associated with multiple transmission layers, the third non-zero coefficient indication is shared among all transmission layers of the at least part of the target CSI.

12. The method according to claim 11, characterized in that All transmission layers of at least part of the target CSI satisfy at least one of the following: The same spatial basis vector is associated with the same third non-zero coefficient indication part; The same frequency domain basis vector is associated with the same third non-zero coefficient indication part; The same Doppler domain basis vector is associated with the same third non-zero coefficient indication portion; The same polarization direction and the same spatial basis vector are associated with the same third non-zero coefficient indication part; The same polarization direction and the same frequency domain basis vector are associated with the same third non-zero coefficient indication part; The same polarization direction and the same Doppler domain basis vector are associated with the same third non-zero coefficient indication part.

13. The method according to claim 11, characterized in that The length of the third non-zero coefficient indication is determined according to at least one of the following: the number of spatial basis vectors in the union of spatial basis vectors associated with all transmission layers of the at least part of the target CSI; the number of frequency domain basis vectors in the union of frequency domain basis vectors associated with all transmission layers of the at least part of the target CSI; The number of Doppler basis vectors in the union of Doppler domain basis vectors associated with all transmission layers of the at least part of the target CSI.

14. The method according to any one of claims 1 to 13, characterized in that: In the case where at least one PMI feedback amount is shared between at least part of the target CSIs, the CSI report further includes at least one of the following: Target basis vector indication; Target phase deviation indication.

15. The method according to claim 14, characterized in that The target base vector indication is used to indicate at least one base vector, and the at least one base vector is used to compress the at least one PMI feedback amount associated with the at least part of the target CSI to obtain the at least one shared PMI feedback amount.

16. The method according to claim 14, characterized in that The target phase offset indication is used to indicate at least one phase offset, and the at least one phase offset is used to compress the at least one PMI feedback amount associated with the at least part of the target CSI to obtain the at least one shared PMI feedback amount.

17. The method according to any one of claims 1 to 16, characterized in that: The terminal obtains at least one channel state information CSI, including: The terminal obtains the at least one CSI by measuring multiple channel state information reference signals CSI-RS configured by a network side device; wherein the multiple CSI-RS are divided into multiple CSI-RS groups according to high-level signaling or default rules.

18. The method according to claim 17, characterized in that The terminal obtains the at least one CSI by measuring a plurality of channel state information reference signals CSI-RS configured by a network side device, including: The terminal measures a first CSI-RS group, and selects at least one first CSI-RS from the first CSI-RS group according to the measurement result, wherein the first CSI-RS group is one of the multiple CSI-RS groups; For any of the first CSI-RSs, the terminal acquires a second CSI-RS group associated with the first CSI-RS, wherein the second CSI-RS group is a CSI-RS group other than the first CSI-RS group among the multiple CSI-RS groups; The terminal acquires the at least one CSI by measuring at least one second CSI-RS in the second CSI-RS group.

19. A method for obtaining a channel state information report, characterized in that: include: The network side device receives a CSI report reported by the terminal, wherein the CSI report includes at least one target CSI among the at least one CSI, and the at least one target CSI satisfies at least one of the following: At least one precoding matrix indication PMI feedback amount is shared between at least some of the at least one target CSI; In a case where one of the at least one target CSI is associated with multiple transmission layers, the first non-zero coefficient indication is shared among the multiple transmission layers.

20. The method according to claim 19, characterized in that After the network side device receives the CSI report reported by the terminal, the method further includes: The network-side device acquires at least one of the following according to the shared at least one PMI feedback amount or the shared first non-zero coefficient indication in the CSI report: a non-zero coefficient indication associated with each of the target CSIs; a non-zero coefficient indication associated with each transmission layer of each of the target CSIs; The PMI feedback amount associated with each of the target CSIs.

21. The method according to claim 19 or 20, characterized in that After the network side device receives the CSI report reported by the terminal, the method further includes: In a case where at least one PMI feedback amount is shared between at least part of the target CSIs, the network side device determines the length of the second non-zero coefficient indication in the CSI report according to at least one of the following: A maximum value among the rank values ​​of at least part of the target CSI; a rank value of the at least part of the target CSI; the number of spatial basis vectors in the union of spatial basis vectors associated with at least part of the target CSI; the number of frequency domain basis vectors in the union of frequency domain basis vectors associated with at least part of the target CSI; The number of Doppler basis vectors in the union of Doppler domain basis vectors associated with at least part of the target CSI.

22. The method according to claim 21, characterized in that The CSI report also includes at least one of the following: The first indication information is used to indicate the number of spatial basis vectors in the union of spatial basis vectors associated with at least part of the target CSI; The second indication information is used to indicate the number of frequency domain basis vectors in the union of frequency domain basis vectors associated with at least part of the target CSI; The third indication information is used for the number of Doppler basis vectors in the union of Doppler domain basis vectors associated with at least part of the target CSI.

23. The method according to claim 22, characterized in that The first indication information is used to indicate a first number, and the number of spatial basis vectors in the union of the spatial basis vectors associated with at least part of the target CSI is the difference between the total number of spatial basis vectors associated with at least part of the target CSI and the first number; The second indication information is used to indicate a second number, and the number of frequency domain basis vectors in the union of frequency domain basis vectors associated with at least part of the target CSI is the difference between the total number of frequency domain basis vectors associated with at least part of the target CSI and the second number; The third indication information is used to indicate a third number, and the number of Doppler domain basis vectors in the union of Doppler domain basis vectors associated with at least part of the target CSI is the difference between the total number of Doppler domain basis vectors associated with at least part of the target CSI and the third number.

24. The method according to any one of claims 21 to 23, characterized in that The network side device configures at least one candidate layer association indication through high-layer signaling, wherein the candidate layer association indication is used to indicate the candidate correspondence relationship of the layers between at least part of the target CSI.

25. The method according to any one of claims 21 to 23, characterized in that The CSI report also includes: at least one target layer association indication, wherein the target layer association indication is used to indicate the corresponding relationship between the layers of at least part of the target CSI.

26. The method according to claim 25, characterized in that After the network side device receives the CSI report reported by the terminal, the method further includes: The network side device determines, according to the target layer association indication, a corresponding relationship between the layers of at least part of the target CSI; The network side device determines the layers of each of the target CSIs that share the at least one PMI feedback amount based on the corresponding relationship between the layers of at least part of the target CSIs.

27. The method according to claim 20, characterized in that After the network side device receives the CSI report reported by the terminal, the method further includes: In a case where the first non-zero coefficient indication is shared between multiple transmission layers associated with one of the target CSIs, the network side device determines the length of the first non-zero coefficient indication in the CSI report according to at least one of the following: The number of spatial basis vectors in the union of spatial basis vectors associated with multiple transmission layers of the target CSI; The number of frequency domain basis vectors in the union of frequency domain basis vectors associated with multiple transmission layers of the target CSI; The number of Doppler basis vectors in the union of Doppler domain basis vectors associated with multiple transmission layers of the target CSI.

28. The method according to claim 27, characterized in that In a case where each of the target CSIs in the at least part of the target CSIs is associated with at least one transmission layer, the third non-zero coefficient indication is shared among all transmission layers of the at least part of the target CSIs.

29. The method according to claim 28, characterized in that After the network side device receives the CSI report reported by the terminal, the method further includes: The network side device determines the length of the third non-zero coefficient indication in the CSI report according to at least one of the following: the number of spatial basis vectors in the union of spatial basis vectors associated with all transmission layers of the at least part of the target CSI; the number of frequency domain basis vectors in the union of frequency domain basis vectors associated with all transmission layers of the at least part of the target CSI; The number of Doppler basis vectors in the union of Doppler domain basis vectors associated with all transmission layers of the at least part of the target CSI.

30. The method according to any one of claims 20 to 29, characterized in that In the case where at least one PMI feedback amount is shared between at least part of the target CSIs, the CSI report further includes at least one of the following: Target basis vector indication; Target phase deviation indication.

31. The method according to any one of claims 19 to 30, characterized in that Before the network side device receives the CSI report reported by the terminal, the method further includes: The network side device configures multiple CSI-RSs for the terminal, wherein the multiple CSI-RSs are divided into multiple CSI-RS groups according to high-level signaling or default rules, a first CSI-RS group among the multiple CSI-RS groups is used to instruct the terminal to measure the first CSI-RS group, select at least one first CSI-RS in the first CSI-RS group according to the measurement result, and obtain at least one CSI by measuring at least one second CSI-RS in a second CSI-RS group associated with the first CSI-RS, wherein the second CSI-RS group is a CSI-RS group among the multiple CSI-RS groups except the first CSI-RS group.

32. The method according to claim 31, characterized in that The multiple CSI-RSs satisfy at least one of the following: The number of CSI-RS ports associated with multiple CSI-RSs is not exactly the same; The number of configured CSI-RS is related to the number of CSI-RSs for which the configured ports are less than the preset value; The number of configured CSI-RS is related to the number of CSI-RS associated with N time slots before the predetermined time, where N is a positive integer; The configured CSI-RS is associated with multiple time slots, and the time slot interval between two adjacent CSI-RS or CSI-RS groups is configured by the network.

33. A reporting device for channel state information report, characterized in that: include: A first acquisition module, configured to acquire at least one channel state information CSI; A reporting module, configured to report a CSI report based on the at least one CSI obtained; The CSI report includes at least one target CSI among the at least one CSI, and the at least one target CSI satisfies at least one of the following: At least one precoding matrix indication PMI feedback amount is shared between at least some of the at least one target CSI; In a case where one of the at least one target CSI is associated with multiple transmission layers, the first non-zero coefficient indication is shared among the multiple transmission layers.

34. A device for acquiring a channel state information report, characterized in that: include: A receiving module, configured to receive a CSI report reported by a terminal, wherein the CSI report includes at least one target CSI among the at least one CSI, and the at least one target CSI satisfies at least one of the following: At least one precoding matrix indication PMI feedback amount is shared between at least some of the at least one target CSI; In a case where one of the at least one target CSI is associated with multiple transmission layers, the first non-zero coefficient indication is shared among the multiple transmission layers; The second acquisition module is used to acquire the at least one target CSI based on the CSI report.

35. A terminal, characterized in that: It includes a processor and a memory, the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the reporting method of the channel state information report as described in any one of claims 1 to 18 are implemented.

36. A network side device, characterized in that: It includes a processor and a memory, the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method for obtaining the channel state information report as described in any one of claims 19 to 32 are implemented.

37. A readable storage medium, characterized in that: The readable storage medium stores a program or instruction, and when the program or instruction is executed by the processor, it implements the steps of the method for reporting the channel state information report as described in any one of claims 1 to 18, or implements the steps of the method for obtaining the channel state information report as described in any one of claims 19 to 32.

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