Channel state information (CSI) reporting method, terminal and network side equipment

Abstract

Disclosed are a channel state information (CSI) reporting method, a terminal and a network side device, belonging to the technical field of communications, the channel state information (CSI) reporting method of the embodiment of the present application comprising: a terminal obtaining K measurement resources associated with a plurality of bandwidths, K being an integer greater than or equal to 1; the terminal performs measurement on the K measurement resources to generate a CSI report; and the terminal sends the CSI report.

Description

Technical Field

[0001] The present application belongs to the field of communication technology, and specifically relates to a channel state information (CSI) reporting method, a terminal, and a network-side device. Background Art

[0002] In the current New Radio (NR) system, the Channel State Information-Reporting (CSI-Reporting) configuration is only associated with one carrier or serving cell, and the CSI resource (CSI-resources) configuration is only associated with an activated bandwidth part (Bandwidth Part, BWP) under a certain carrier.

[0003] Since CSI reports associated with different carriers or service cells are independently configured in existing protocols, when the terminal is configured with carrier aggregation transmission, such as continuous carrier aggregation within an intra-band, the channel characteristics of several adjacent carriers may be highly correlated. There will also be similar redundant information in the corresponding CSI reports, such as information characterizing beam orientation, delay distribution characteristics, and Doppler characteristics in the feedback codebook, which makes the CSI reporting signaling overhead large. When the bandwidth configured by BWP is small, the channel measurement performance will suffer performance loss in terms of noise resistance or channel multipath resolution compared to the configuration under large bandwidth, resulting in low channel measurement accuracy. Summary of the invention

[0004] The embodiments of the present application provide a channel state information (CSI) reporting method, a terminal, and a network-side device, which can solve the problems of large CSI reporting signaling overhead and low channel measurement accuracy.

[0005] In a first aspect, a channel state information CSI reporting method is provided, which is executed by a terminal and includes:

[0006] The terminal obtains K measurement resources associated with multiple bandwidths, where K is an integer greater than or equal to 1;

[0007] The terminal performs measurement on the K measurement resources and generates a CSI report;

[0008] The terminal sends the CSI report.

[0009] In a second aspect, a channel state information CSI reporting method is provided, which is executed by a network side device and includes:

[0010] The network side device configures K measurement resources associated with multiple bandwidths for the terminal, where K is an integer greater than or equal to 1;

[0011] The network side device receives a CSI report, where the CSI report is generated by measuring on the K measurement resources.

[0012] In a third aspect, a channel state information CSI reporting device is provided, including:

[0013] An acquisition module, used to acquire K measurement resources associated with multiple bandwidths, where K is an integer greater than or equal to 1;

[0014] A measurement module, configured to perform measurement on the K measurement resources and generate a CSI report;

[0015] A sending module is used to send the CSI report.

[0016] In a fourth aspect, a channel state information CSI reporting device is provided, including:

[0017] A configuration module, configured to configure K measurement resources associated with multiple bandwidths for the terminal, where K is an integer greater than or equal to 1;

[0018] The receiving module is used to receive a CSI report, where the CSI report is generated by measuring on the K measurement resources.

[0019] In a fifth aspect, a terminal is provided, comprising a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method described in the first aspect are implemented.

[0020] In a sixth aspect, a terminal is provided, comprising a processor and a communication interface, wherein the processor is used to obtain K measurement resources associated with multiple bandwidths, K being an integer greater than or equal to 1; perform measurements on the K measurement resources to generate a CSI report; and send the CSI report.

[0021] In the seventh aspect, a network side device is provided, which includes a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the program or instructions are executed by the processor, the steps of the method described in the second aspect are implemented.

[0022] In an eighth aspect, a network side device is provided, comprising a processor and a communication interface, wherein the processor is used to configure K measurement resources associated with multiple bandwidths for a terminal, where K is an integer greater than or equal to 1; the K measurement resources are used to instruct the terminal to perform measurements on the K measurement resources to generate a CSI report.

[0023] In a ninth aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method described in the second aspect are implemented.

[0024] In the tenth aspect, a wireless communication system is provided, including: a terminal and a network side device, wherein the terminal can be used to execute the steps of the method described in the first aspect, and the network side device can be used to execute the steps of the method described in the second aspect.

[0025] In the eleventh aspect, a chip is provided, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the method described in the first aspect, or to implement the method described in the second aspect.

[0026] In the twelfth aspect, a computer program / program product is provided, which is stored in a storage medium, and the program / program product is executed by at least one processor to implement the steps of the channel state information CSI reporting method as described in the first aspect, or to implement the steps of the channel state information CSI reporting method as described in the second aspect.

[0027] In an embodiment of the present application, the terminal obtains K measurement resources associated with multiple bandwidths, and the terminal can perform measurements on the K measurement resources, generate a CSI report and report it, thereby realizing CSI joint feedback based on multiple bandwidth aggregation, which can reduce the signaling overhead of CSI reporting, improve the accuracy of channel measurement, and thus improve system performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic diagram of a wireless communication system to which the embodiments of the present application can be applied;

[0029] Figure 2 This is one of the flow charts of the CSI reporting method provided in the embodiment of the present application;

[0030] Figure 3 It is a schematic diagram of one NZP CSI-RS resource distributed on two bandwidths provided in an embodiment of the present application;

[0031] Figure 4 It is a schematic diagram of two NZP CSI-RS resources associated with a carrier or a serving cell provided in an embodiment of the present application;

[0032] Figure 5 This is the second flow chart of the CSI reporting method provided in the embodiment of the present application;

[0033] Figure 6is a schematic diagram of interaction between a terminal and a network side device provided in an embodiment of the present application;

[0034] Figure 7 This is one of the structural diagrams of the CSI reporting device provided in the embodiment of the present application;

[0035] Figure 8 This is the second structural diagram of the CSI reporting device provided in the embodiment of the present application;

[0036] Fig. 9 is a schematic diagram of the structure of a communication device provided in an embodiment of the present application;

[0037] Fig.10 is a schematic diagram of the structure of a terminal provided in an embodiment of the present application;

[0038] Fig.11 It is a structural diagram of the network side device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of this application.

[0040] The terms "first", "second", etc. of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of one type, and the number of objects is not limited, for example, the first object can be one or more. In addition, "or" in the present application represents at least one of the connected objects. For example, "A or B" covers three schemes, namely, Scheme 1: including A but not including B; Scheme 2: including B but not including A; Scheme 3: including both A and B. The character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0041] The term "indication" in this application can be a direct indication (or explicit indication) or an indirect indication (or implicit indication). A direct indication can be understood as the sender explicitly informing the receiver of specific information, operations to be performed, or request results in the sent indication; an indirect indication can be understood as the receiver determining the corresponding information according to the indication sent by the sender, or making a judgment and determining the operation to be performed or the request result according to the judgment result.

[0042] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) or other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described technology can be used for the systems and radio technologies mentioned above as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and NR terminology is used in most of the following descriptions, but these technologies can also be applied to systems other than NR systems, such as the 6th generation (6 th Generation, 6G) communication system.

[0043] Figure 1A block diagram of a wireless communication system applicable to an embodiment of the present application is shown. The wireless communication system includes a terminal 11 and a network side device 12. Among them, the terminal 11 can be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a handheld computer, a netbook, an ultra-mobile personal computer (Ultra-mobile Personal Computer, UMPC), a mobile Internet device (Mobile Internet Device, MID), an augmented reality (Augmented Reality, AR), a virtual reality (Virtual Reality, VR) device, a robot, a wearable device (Wearable Device), an aircraft (flight vehicle), a vehicle-mounted device (Vehicle User Equipment, VUE), a ship-mounted device, a pedestrian terminal (Pedestrian User Equipment, PUE), a smart home (home appliances with wireless communication functions, such as refrigerators, televisions, washing machines or furniture, etc.), a game console, a personal computer (Personal Computer, PC), a teller machine or a self-service machine and other terminal side devices. Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle-mounted device can also be called a vehicle-mounted terminal, a vehicle-mounted controller, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip or a vehicle-mounted unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 may include an access network device or a core network device, wherein the access network device may also be referred to as a radio access network (Radio Access Network, RAN) device, a radio access network function or a radio access network unit. The access network device may include a base station, a wireless local area network (Wireless Local Area Network, WLAN) access point (Access Point, AP) or a wireless fidelity (Wireless Fidelity, WiFi) node, etc.Among them, the base station may be referred to as a Node B (NB), an evolved Node B (eNB), a next generation Node B (gNB), a New Radio Node B (NR Node B), an access point, a Relay Base Station (RBS), a Serving Base Station (SBS), a Base Transceiver Station (BTS), a radio base station, a radio transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a Home Node B (HNB), a Home Evolved Node B, a Transmission Reception Point (TRP) or other appropriate terms in the field. As long as the same technical effect is achieved, the base station is not limited to specific technical terms. It should be noted that in the embodiments of the present application, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited.

[0044] The 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 (Mobility Management Entity, MME), access mobility management function (Access and Mobility Management Function, AMF), session management function (Session Management Function, SMF), user plane function (User Plane Function, UPF), policy control function (Policy Control Function, PCF), policy and charging rules function unit (Policy and Charging Rules Function, PCRF), edge application service discovery function (Edge Application Server Discovery Function, EASDF), unified data management (Unified Data Management, UDM), unified data storage (Unified Data Repository, UDR), home user server (Home Subscriber Server, HSS), centralized network configuration (CNC), network storage function (Network Repository Function, NRF), network exposure function (Network Exposure Function, NEF), local NEF (Local NEF, or L-NEF), binding support function (Binding Support Function, BSF), application function (Application Function, AF), etc. It should be noted that in the embodiments of the present application, only the core network device in the NR system is introduced as an example, and the specific type of the core network device is not limited.

[0045] In order to facilitate a clearer understanding of the various embodiments of the present application, some relevant background technical knowledge is first introduced as follows.

[0046] 1. User Equipment (UE) CSI reporting rules:

[0047] The network can configure multiple CSI-reportings for the UE. Different reportings can be associated with the same or different carrier indices (or serving cell indices). Each CSI-Reporting has its own reporting identifier (ID). Each CSI-Reporting can be aperiodic (AP), periodic or semi-persistent (SP) reporting.

[0048] Each CSI reporting setting is associated with only one activated BWP under a certain carrier, where the carrier index is indicated by the carrier in the high-level signaling CSI reporting configuration (CSI-ReportConfig), and the BWP index is indicated by the BWP-identifier (Id) in the CSI resource configuration (CSI-ResourceConfig) associated with the reporting.

[0049] The UE performs channel measurement only based on the CSI reference signal resources (CSI-RS resources) within the activated BWP bandwidth, rather than the frequency band resources of the CSI-RS resources indicated by the higher layer configuration.

[0050] The uplink time-frequency resources occupied by multiple CSI-reportings may overlap and collide. When multiple CSI-reportings are reported, they need to be sorted based on certain priority rules. Under the limitation of limited time-frequency resources, some CSI-reportings with low priority are discarded. The NR protocol (38.214 5.2.5 section) gives a priority formula, which is expressed by formula (1):

[0051] Pri iCSI (y,k,c,s)=2·N cells ·M s y+N cells .M s ·k+M s ·c+s (1)

[0052] Where s represents the CSI reporting ID, M s Indicates the maximum number of reporting configured by the high-level layer, c indicates the serving cell index (or carrier index), N cellsIndicates the maximum number of serving cells supported by the high-level configuration; k=0 indicates that the current CSI Reporting carries L1 reference signal received power (Layer 1Reference Signal ReceivedPower, L1-RSRP) or L1-Signal-to-Noise and InterferenceRatio, SINR); k=1 indicates not carrying; y=0 indicates that AP-CSI reporting is carried on the physical uplink shared channel (Physical uplink shared channel, PUSCH) for transmission; y=1 indicates that SP-CSI reporting is carried on PUSCH for transmission; y=2 indicates that SP-CSI reporting is carried on the physical uplink control channel (Physical UplinkControl Channel, PUCCH) for transmission; y=3 indicates that P-CSI reporting is carried on PUCCH for transmission.

[0053] The CSI reporting method provided in the embodiment of the present application is described in detail below through some embodiments and their application scenarios in combination with the accompanying drawings.

[0054] In order to reduce the signaling overhead of CSI reporting or improve the accuracy of channel measurement based on bandwidth aggregation, an embodiment of the present application provides a CSI reporting method, which can be applied to the CSI reporting scenario. The terminal obtains K measurement resources associated with multiple bandwidths, and the terminal can perform measurements on the K measurement resources, generate a CSI report and report it, thereby realizing CSI joint feedback based on multiple bandwidth aggregation, which can reduce the signaling overhead of CSI reporting, improve the accuracy of channel measurement, and thus improve system performance.

[0055] Figure 2 This is one of the flow charts of the CSI reporting method provided in the embodiment of the present application, such as Figure 2 As shown, the method includes steps 201 to 203; wherein:

[0056] Step 201: The terminal obtains K measurement resources associated with multiple bandwidths, where K is an integer greater than or equal to 1.

[0057] It should be noted that the embodiments of the present application can be applied to CSI reporting scenarios, where the terminals include but are not limited to the types of terminals 11 listed above, and the network side devices include but are not limited to the types of network side devices 12 listed above, and the embodiments of the present application do not limit this.

[0058] Optionally, the K measurement resources include at least one of the following:

[0059] K non-zero power CSI reference signal resources (Non-Zero Power CSI-RS resources, NZP CSI-RS resources);

[0060] Measurement resources occupied by K synchronization signal / physical broadcast channel blocks (Synchronization Signal and PBCH block, SSB);

[0061] K measurement resources for interference measurement;

[0062] When K is equal to 1, one measurement resource is associated with the multiple bandwidths; or when K is greater than 1, different measurement resources are in a one-to-one correspondence with different bandwidths.

[0063] Optionally, the terminal performs CSI measurement based on K measurement resources associated with multiple bandwidths. There are two potential configurations:

[0064] Configuration 1: When K is equal to 1, that is, only one measurement resource is configured, and one measurement resource is associated with multiple bandwidths. Based on the measurement resource, the terminal performs CSI measurement on the multiple bandwidths associated with the measurement resource and reports the measured CSI report.

[0065] For example, when the measurement resource is one NZP CSI-RS resource, the two associated bandwidths are respectively associated with different carriers or serving cells. Figure 3 is a schematic diagram of one NZP CSI-RS resource distributed on two bandwidths provided in an embodiment of the present application, such as Figure 3 As shown, part of the resource elements (RE) of one NZP CSI-RS resource are distributed on the bandwidth of an associated serving cell 1 (Serving cell index 1), and the other part of the resource elements are distributed on the bandwidth of an associated serving cell 2 (Serving cell index 2).

[0066] Configuration 2: When K is greater than 1, K measurement resources are configured, and different measurement resources correspond to different bandwidths in a one-to-one relationship. The terminal performs CSI measurement on multiple bandwidths respectively associated with the K measurement resources based on the K measurement resources, generates a CSI report, and reports the measured CSI report, thereby realizing joint measurement of the channel based on at least one of multiple bandwidth NZP CSI-RSresources, measurement resources occupied by SSB, and measurement resources used for interference measurement, and compressing CSI feedback, thereby improving the accuracy of channel measurement.

[0067] When the measurement resources are two NZP CSI-RS resources, the two NZP CSI-RS resources are respectively associated with different carriers or serving cells. Figure 4 2 is a schematic diagram of two NZP CSI-RS resources associated with carriers or serving cells provided in an embodiment of the present application, such as Figure 4 As shown, CSI-RS resource 1 is associated with serving cell 1, and CSI-RS resource 2 is associated with serving cell 2.

[0068] CSI compression is one of the evolution directions of Multiple In Multiple Out (MIMO) versions. For example, the Type II-codebook of Release 16 (R16) introduced frequency domain compression, the codebook joint design under the coherent joint transmission (CJT) of R18, and channel prediction by compression in the time domain.

[0069] Step 202: The terminal performs measurement on the K measurement resources and generates a CSI report.

[0070] Optionally, after acquiring K measurement resources associated with multiple bandwidths, the terminal may perform measurement on the K measurement resources to generate a CSI report.

[0071] Step 203: The terminal sends the CSI report.

[0072] Optionally, after generating a CSI report, the terminal sends the CSI report to the network side device.

[0073] The CSI reporting method provided in the embodiment of the present application obtains K measurement resources associated with multiple bandwidths through the terminal. The terminal can perform measurements on the K measurement resources, generate a CSI report and report it, thereby realizing CSI joint feedback based on multiple bandwidth aggregation, which can reduce the signaling overhead of CSI reporting, improve the accuracy of channel measurement, and thus improve system performance.

[0074] Optionally, when K is equal to the number of the multiple bandwidths, different measurement resources are in a one-to-one correspondence with different bandwidths, and the K measurement resources satisfy at least one of the following:

[0075] 1) The frequency domain resources occupied by different measurement resources do not overlap;

[0076] 2) The frequency domain resources occupied by different measurement resources at least partially overlap, and the time domain resources occupied by different measurement resources do not overlap.

[0077] Optionally, when the time domain resources occupied by different measurement resources do not overlap, the maximum allowed time interval between two adjacent measurement resources is M, where M is the capability reported by the terminal.

[0078] 3) The pattern mapping rules of different measurement resources on their respective bandwidths are the same.

[0079] Optionally, the pattern mapping rules of the different measurement resources on respective bandwidths satisfy at least one of the following:

[0080] a) Different measurement resources use the same RF link.

[0081] Optionally, the network side device may use the same radio frequency link to send measurement signals corresponding to measurement resources on different bandwidths, thereby avoiding phase amplitude jumps caused by hardware inconsistency.

[0082] b) Different measurement resources completely overlap in the time domain.

[0083] c) Different measurement resources are associated with the same transmit antenna port.

[0084] d) Different measurement resources are configured with the same transmit power. For example, the transmit power is the energy per resource element (EPRE).

[0085] e) Different measurement resources are configured with the same transmission period and slot offset;

[0086] f) Different measurement resources are configured with the same frequency domain interval, wherein the common reference point of the K bandwidths is the starting subcarrier index 0, and the intervals are the same frequency domain interval.

[0087] Optionally, the frequency domain interval represents the distribution density of the measurement resources in the frequency domain; and no measurement resources are placed in the guard band between two bandwidths.

[0088] g) Different measurement resources are configured with the same subcarrier size and cyclic prefix CP size.

[0089] Optionally, a specific implementation of step 201 includes:

[0090] Mode 1: The terminal obtains a CSI reporting configuration, where the CSI reporting configuration is associated with the multiple bandwidths, and the CSI reporting configuration includes indication information for indicating K measurement resources associated with the multiple bandwidths;

[0091] or,

[0092] Mode 2: The terminal obtains a CSI measurement configuration, where the CSI measurement configuration includes indication information for indicating K measurement resources associated with the multiple bandwidths.

[0093] Optionally, the CSI reporting configuration is CSI-ReportConfig, and the CSI measurement configuration is CSI-MeasConfig. When the terminal performs CSI measurement, it configures a CSI reporting configuration (CSI-ReportConfig) or a CSI measurement configuration (CSI-MeasConfig) through high-layer signaling of a network-side device.

[0094] The network side device configures the CSI reporting configuration or the CSI reporting configuration through high-level signaling, and sends the configured CSI reporting configuration or the CSI reporting configuration to the terminal, and the terminal receives the CSI reporting configuration or the CSI reporting configuration sent by the network side device; wherein the CSI reporting configuration includes indication information for indicating K measurement resources associated with multiple bandwidths, that is, the CSI reporting configuration is associated with multiple bandwidths, and the CSI measurement configuration includes indication information for indicating K measurement resources associated with multiple bandwidths, that is, the CSI measurement configuration is also associated with multiple bandwidths.

[0095] For example, one CSI-ReportConfig may be associated with multiple bandwidth parts (BWPs) under one or more carriers (or serving cells), and these BWPs may be activated or inactivated.

[0096] After obtaining the CSI reporting configuration, the terminal can obtain K measurement resources based on the indication information of the K measurement resources associated with multiple bandwidths; or, after obtaining the CSI measurement configuration, the terminal can obtain K measurement resources based on the indication information of the K measurement resources associated with multiple bandwidths, so that the terminal can perform measurements on the K measurement resources to obtain a CSI report, thereby improving the flexibility of the CSI report measurement and the accuracy of the channel measurement, thereby improving the system performance.

[0097] Optionally, the multiple bandwidths are associated with at least one of the following:

[0098] (1) Carriers with different indexes.

[0099] (2) Serving cells with different indexes.

[0100] Optionally, when a CSI reporting configuration (CSI-ReportConfig) is associated with multiple carriers with different indexes or service cells with different indexes, one configuration method is that high-level signaling can be configured by configuring a carrier or service cell index list in the CSI-ReportConfig, and another configuration method is that a CSI-ReportConfig includes multiple sub-configurations, each sub-configuration is associated with a bandwidth, for example, associated with a carrier or a service cell.

[0101] If the reporting type of each sub-configuration is the same, for example, they are all feedback of Type 1 codebook (TypeI-codebook), then the report type is indicated in CSI-ReportConfig. If each sub-configuration is a different report type, the report type configuration is indicated in each sub-configuration, for example, some sub-configurations are feedback precoding matrix indicator (Precoding matrix indicator, PMI) and channel quality indicator (Channel quality indicator, CQI), some sub-configurations are feedback L1-RSRP, some sub-configurations are feedback of enhanced Type II-codebook (eTypeII-codebook) defined in different versions (Release) of the 5G NR protocol (for example, Rel 16, Rel 17, Rel 18, and Rel 18 continue to enhance the TypeII-codebook), and some sub-configurations are feedback TypeI-codebook defined in R15.

[0102] (3) Partial bandwidth BWP of different indexes.

[0103] Optionally, when a CSI-ReportConfig is associated with multiple BWPs of different indexes, the associated CSI resource configuration (CSI-ResourceConfig) will be configured in the CSI-ReportingConfig, where the CSI-ResourceConfig indicates one or more CSI-RS resource sets (set(s)) for channel measurement.

[0104] One configuration method is that CSI-ReportingConfig is associated with multiple CSI-ResourceConfigs, and different CSI-ResourceConfigs are associated with different BWP indexes; another configuration method is that CSI-ResourceConfig is associated with one CSI-ResourceConfig, and the CSI-ResourceConfig is associated with one or more CSI-Resource sets. If CSI-ResourceConfig is associated with multiple CSI-Resource sets, different CSI-Resource sets are associated with different BWP indexes; if CSI-ResourceConfig is associated with one CSI-Resource set, the CSI-Resource set is associated with a BWP index list, or only associated with a nominal BWP indication, and the nominal BWP represents the aggregation of multiple BWPs, where the multiple BWPs include one activated BWP and other inactivated BWPs.

[0105] Optionally, BWPs with different indexes belong to the same carrier or serving cell.

[0106] (4) Different carriers or serving cells associated with a specific BWP.

[0107] Specifically, multiple bandwidths are associated with one specific BWP, and the specific BWP is associated with different carriers or service cells.

[0108] Optionally, in the case where the multiple bandwidths are associated with carriers of different indexes, or the multiple bandwidths are associated with service cells of different indexes, the terminal determines the maximum or minimum index among the indices of the multiple bandwidth-associated carriers or service cells as a reference index; or, the terminal determines the first index among the indices of the multiple bandwidth-associated carriers or service cells as a reference index; or, the terminal determines one of the indices of the multiple bandwidth-associated carriers or service cells as a reference index; wherein the reference index is used to calculate the priority of the CSI report.

[0109] Optionally, the CSI measurement is performed by the terminal based on K measurement resources associated with multiple bandwidths. The K measurement resources may correspond to multiple CSI reports at the same time. The terminal needs to sort them according to the reporting priority rule and give priority to reporting the CSI report with a high priority.

[0110] When determining that the parameters in the CSI report priority formula are related to the index of the serving cell, and the multiple bandwidths associated with the CSI report are distinguished by associating carriers with different indexes or serving cells with different indexes, it is necessary to indicate one of the indexes as a reference index, which is used to calculate the priority of the CSI report.

[0111] The determination of the reference index includes: in the case of multiple bandwidths associated with carriers of different indexes, or multiple bandwidths associated with service cells of different indexes, the terminal determines the largest or smallest index among the multiple indexes in the carrier index list or service cell index list associated with multiple bandwidths as the reference index; wherein the reference index is used to calculate the priority of the CSI report. Alternatively, the terminal determines the first index among the indexes in the carrier index list or service cell list associated with multiple bandwidths as the reference index; wherein the reference index is used to calculate the priority of the CSI report. Alternatively, the terminal determines one of the indexes in the carrier index list or service cell list associated with multiple bandwidths indicated by the network side device as the reference index; wherein the reference index is used to calculate the priority of the CSI report. This realizes the priority calculation of the CSI report, enables the terminal to preferentially report high-priority CSI reports, and improves the flexibility of CSI reporting.

[0112] For example, when a CSI report is associated with a serving cell index list {2, 1, 3}, the priority formula (formula (1)) of the NR protocol (section 38.214.5.2.5) needs to confirm that the parameter c is a value in the serving cell index list {2, 1, 3}. The terminal can take the minimum value 1 or the maximum value 3, or take the first value 2 in {2, 1, 3}, or the terminal determines a default value (e.g., index 1) indicated by the network side device in the signaling as the reference index.

[0113] Optionally, when there are multiple valid subbands in the N subbands indicated by the CSI reporting configuration, the number of valid subbands in the N subbands is determined by the number of valid subbands indicated by the multiple bandwidths, and N is a positive integer.

[0114] Optionally, there is a frequency configuration report (reportFreqConfiguration) sub-configuration in the CSI reporting configuration. The reportFreqConfiguration sub-configuration indicates the number and position of valid sub-bands in N sub-bands through a bitmap. The number of valid sub-bands in N sub-bands is determined by the number of valid sub-bands indicated by multiple bandwidths. When the type of CSI report reported is an enhanced TypeII-codebook based on frequency domain compression (for example, Rel 16, Rel 17, Rel18, and Rel 18 further enhanced TypeII-codebook), the terminal determines the length N3 of the compressed Fourier transform (Discrete Fourier Transform, DFT) basis in the frequency domain, which is associated with the number of valid sub-bands indicated by multiple bandwidths.

[0115] For example, high-level signaling (for example, there is a reportFreqConfiguration sub-configuration in the CSI reporting configuration, and the reportFreqConfiguration sub-configuration is indicated by a bitmap) indicates N1 valid sub-bands on bandwidth 1 and N2 valid sub-bands on bandwidth 2, then N3 = (N1 + N2) * R, or N3 = (N1 + N2) / R, where R can be a positive integer greater than or equal to 1. Furthermore, in order to ensure compression performance, there cannot be an invalid subband between the valid subbands on the two bandwidths.

[0116] Optionally, 1) the terminal selects a reference bandwidth from the multiple bandwidths; determines a sub-band size of the reference bandwidth; and determines the sub-band size of the reference bandwidth as the sub-band size of other bandwidths in the multiple bandwidths.

[0117] Optionally, in the 5G NR protocol, the sub-band size is related to the bandwidth BWP size, as shown in Table 1, which shows configurable sub-band sizes.

[0118] Table 1. Configurable subband sizes

[0119]

[0120] When the reported CSI-reporting is associated with multiple bandwidths, if the sizes of different bandwidths are different, different subband sizes may appear as described in Table 1 above, which may cause unevenness in the joint CSI calculation. When the reported CSI-reporting involves sub-band-based calculations, the sub-band size needs to be consistent across different bandwidths.

[0121] The terminal selects a reference bandwidth from multiple bandwidths, and then determines the sub-band size of the reference bandwidth; the sub-band size of the reference bandwidth is determined as the sub-band size of other bandwidths in the multiple bandwidths, so that the sub-band sizes of different bandwidths are consistent, which can improve the accuracy of CSI calculation.

[0122] Suppose there are two bandwidths, bandwidth 1 is 64PRB, subbandsize=8; bandwidth 2 is 270PRB, subbandsize=32. To ensure that the two bandwidths have the same subband size, the terminal can select bandwidth 2 as the reference bandwidth from the two associated bandwidths, and then determine the sub-band size of bandwidth 2, and determine the sub-bandsize of bandwidth 2 as the sub-band size of bandwidth 1 in bandwidth 1 and bandwidth 2, which can improve the accuracy of CSI calculation.

[0123] 2) The terminal selects a maximum or minimum subband size from the subband sizes of each bandwidth in the multiple bandwidths, and determines the maximum or minimum subband size as the subband size of each bandwidth in the multiple bandwidths.

[0124] Optionally, the terminal selects the largest or smallest subband size from the subband size of each bandwidth in the multiple bandwidths, and determines it as the subband size of each bandwidth in the multiple bandwidths, so that the subband sizes of different bandwidths are consistent, which can improve the accuracy of CSI calculation. For example, the largest subband size 32 is selected, and subband size 32 is determined as the subband size of bandwidth 1 in bandwidth 1 and bandwidth 2.

[0125] 3) The terminal determines the default sub-band size indicated by the network-side device as the sub-band size of each bandwidth in the multiple bandwidths.

[0126] Optionally, the terminal can determine the default subband size indicated by the network side device as the subband size of each bandwidth in multiple bandwidths, so that the subband sizes of different bandwidths remain consistent, which can improve the accuracy of CSI calculation. That is, the BWP is redefined, and the BWP is the sum of all bandwidths, and then the corresponding subband size is found from Table 1. When it exceeds 275PRB, a new subband size needs to be defined for the subbands exceeding 275PRB.

[0127] 4) The terminal determines a subband size of each bandwidth in the multiple bandwidths based on the measurement bandwidth size, and the measurement bandwidth is associated with the multiple bandwidths; and measurement resources on different aggregated bandwidths are configured with the same subband size.

[0128] Optionally, the sub-band size is associated with the measurement bandwidth size, where the measurement bandwidth is associated with multiple bandwidths. The terminal can determine the sub-band size of each bandwidth in the multiple bandwidths based on the measurement bandwidth size; the measurement resources on different aggregated bandwidths are configured with the same sub-band size, so that the sub-band sizes of different bandwidths remain consistent, which can improve the accuracy of CSI calculation.

[0129] Optionally, a CSI processing capability required by the terminal to generate the CSI report is related to the number of bandwidths in the multiple bandwidths.

[0130] Optionally, when the reported CSI report is associated with multiple bandwidths, a CSI processing unit (CSI processing unit, CPU) required for the terminal to generate the CSI report is related to the number of bandwidths in the multiple bandwidths, or is related to the capability reported by the terminal.

[0131] For example, based on the existing protocol, the terminal calculates the number of CPUs for CSI on a bandwidth as P. When a new CSI report is associated with multiple bandwidths, a new number of CPUs Pnew=Y*P is defined, or Pnew=P+X, where Y and X are both related to the number of bandwidths in multiple aggregated bandwidths, and Y and X may also be capabilities reported by the terminal.

[0132] In addition, when multiple bandwidths are of different report types, a new number of CPUs Pnew=P_1+P_2+...+P_k is defined, where P_k represents the CPU capacity required for the corresponding report type on the k-th bandwidth.

[0133] Optionally, the CSI report includes a wideband channel quality indicator (CQI), and the wideband CQI is calculated based on the multiple bandwidths; or, the CSI report includes multiple wideband CQIs, and the feedback overhead of the wideband CQI is related to the number of bandwidths in the multiple bandwidths.

[0134] Optionally, when the reported CSI report (CSI Report) is associated with multiple bandwidths and the CSI report includes CQI feedback. The CSI report may include one wideband CQI or multiple wideband CQIs. When the CSI report includes one wideband CQI feedback, that is, when one wideband CQI is fed back, the wideband CQI can be calculated based on multiple bandwidths; or, when multiple wideband CQI feedbacks are included in the CSI Report, that is, when multiple wideband CQIs are fed back, the feedback overhead of the wideband CQI is related to the number of bandwidths in the multiple bandwidths, bit overhead = 4*K, where K is the number of bandwidths in the multiple bandwidths; or, bit overhead = 4+(K-1)*Z, indicating that the feedback overhead of feeding back a wideband CQI on a reference bandwidth is 4 bits, and other bandwidths use this as a reference to feed back Z bit differential wideband CQI.

[0135] Optionally, the terminal determines a reference service cell from the multiple bandwidth-associated service cells; the terminal determines that the CQI of the reference service cell is located in the first part (Part 1) of the CSI report, and the CQIs of other service cells among the multiple bandwidth-associated service cells except the reference service cell are located in the second part (Part 2) of the CSI report.

[0136] Optionally, for CQI feedback, the terminal obtains a CQI for each service cell, that is, multiple CQIs included in the CSI report (each CQI is associated with a wideband CQI report and a subband CQI report) are associated with a PMI; further, when there are multiple CQIs, the terminal determines a reference service cell from multiple bandwidth-associated service cells, and then determines that the CQI of the reference service cell is located in the first part (Part 1) of the CSI report, and the CQIs of other service cells are located in the second part (Part 2) of the CSI report, which can reduce the complexity of the CSI report and thereby improve the accuracy of channel measurement.

[0137] Optionally, the terminal determines a reference serving cell from the serving cells associated with the CSI reporting configuration, including at least one of the following:

[0138] (1) The terminal determines the reference serving cell from the multiple bandwidth-associated serving cells based on an instruction from a network-side device.

[0139] Optionally, the network side device may indicate which service cell among multiple bandwidth-associated service cells is a reference service cell, and the terminal may determine the reference service cell from the multiple bandwidth-associated service cells based on the indication of the network side device. For example, the terminal determines that the CQI of a reference service cell is located in Part 1 of the CSI report, and the reference service cell may be determined through the indication of the network side device.

[0140] (2) The terminal determines the first serving cell among the multiple bandwidth-associated serving cells as the reference serving cell.

[0141] For example, in a list of multiple bandwidth-associated serving cells {2, 1, 3}, the terminal may determine the first serving cell 2 as a reference serving cell.

[0142] (3) The terminal determines the first CSI-RS-associated serving cell among the multiple bandwidth-associated serving cells as the reference serving cell.

[0143] For example, there are multiple bandwidth-associated serving cell lists {2, 1, 3}, the serving cell associated with the first CSI-RS is 1, and the terminal determines serving cell 1 as the reference serving cell.

[0144] (4) The terminal determines the serving cell with the smallest or largest cell identification ID among the multiple bandwidth-associated serving cells as the reference serving cell.

[0145] For example, in multiple bandwidth-associated serving cell lists {2, 1, 3}, if the smallest cell ID is 1, the terminal determines serving cell 1 as the reference serving cell. Alternatively, if the largest cell ID is 3, the terminal determines serving cell 3 as the reference serving cell.

[0146] Optionally, when the second part of the CSI report is divided into group 0 (Group0), group 1 (Group1) and group 2 (Group2), the wideband CQI feedback associated with the CQI of the other service cells is located in the group 0, the even subband CQI in the subband CQI feedback associated with the CQI of the other service cells is located in the group 1, and the odd subband CQI in the subband CQI feedback associated with the CQI of the other service cells is located in the group 2.

[0147] Figure 5 This is a second flow chart of the CSI reporting method provided in the embodiment of the present application, such as Figure 5 As shown, the method includes step 501; wherein:

[0148] Step 501: A network-side device configures K measurement resources associated with multiple bandwidths for a terminal, where K is an integer greater than or equal to 1.

[0149] Step 502: The network side device receives a CSI report, where the CSI report is generated by measuring on the K measurement resources.

[0150] Optionally, the K measurement resources include at least one of the following:

[0151] K non-zero power CSI reference signal resources;

[0152] The measurement resources occupied by K SSBs;

[0153] K measurement resources for interference measurement;

[0154] When K is equal to 1, one measurement resource is associated with the multiple bandwidths; or when K is greater than 1, different measurement resources are in a one-to-one correspondence with different bandwidths.

[0155] Optionally, the terminal performs CSI measurement based on K measurement resources associated with multiple bandwidths. There are two potential configurations:

[0156] Configuration 1: When K is equal to 1, that is, only one measurement resource is configured, and one measurement resource is associated with multiple bandwidths. Based on the measurement resource, the terminal performs CSI measurement on the multiple bandwidths associated with the measurement resource and reports the measured CSI report.

[0157] For example, when the measurement resource is 1 NZP CSI-RS resource, the two associated bandwidths are associated with different carriers or serving cells. Figure 3 As shown, part of the resource elements of one NZP CSI-RS resource are distributed on the bandwidth of the associated service cell 1, and the other part of the resource elements are distributed on the bandwidth of the associated service cell 2.

[0158] Configuration 2: When K is greater than 1, K measurement resources are configured, and different measurement resources correspond to different bandwidths in a one-to-one relationship. The terminal performs CSI measurement on multiple bandwidths respectively associated with the K measurement resources based on the K measurement resources, generates a CSI report, and reports the measured CSI report, thereby realizing joint measurement of the channel based on at least one of multiple bandwidth NZP CSI-RSresources, measurement resources occupied by SSB, and measurement resources used for interference measurement, and compressing CSI feedback, thereby improving the accuracy of channel measurement.

[0159] When the measurement resource is two NZP CSI-RS resources, the two NZP CSI-RS resources are associated with different carriers or serving cells. Figure 4 As shown, CSI-RS resource 1 is associated with serving cell 1, and CSI-RS resource 2 is associated with serving cell 2.

[0160] CSI compression is one of the evolution directions of Multiple In Multiple Out (MIMO) versions. For example, the Type II-codebook of Release 16 (R16) introduced frequency domain compression, the codebook joint design under the coherent joint transmission (CJT) of R18, and channel prediction by compression in the time domain.

[0161] After the terminal obtains K measurement resources associated with multiple bandwidths configured by the network side device, the terminal can perform CSI measurement on the K measurement resources associated with the multiple bandwidths, and report the measured CSI report to the network side device.

[0162] The CSI reporting method provided in the embodiment of the present application configures K measurement resources associated with multiple bandwidths for the terminal through a network side device, so that the terminal can perform measurements on the K measurement resources, generate a CSI report and report it, thereby realizing CSI joint feedback based on multiple bandwidth aggregation, which can reduce the signaling overhead of CSI reporting, improve the accuracy of channel measurement, and thus improve system performance.

[0163] Optionally, when K is equal to the number of the multiple bandwidths, different measurement resources are in a one-to-one correspondence with different bandwidths, and the K measurement resources satisfy at least one of the following:

[0164] 1) The frequency domain resources occupied by different measurement resources do not overlap;

[0165] 2) The frequency domain resources occupied by different measurement resources at least partially overlap, and the time domain resources occupied by different measurement resources do not overlap.

[0166] Optionally, when the time domain resources occupied by different measurement resources do not overlap, the maximum allowed time interval between two adjacent measurement resources is M, where M is the capability reported by the terminal.

[0167] 3) The pattern mapping rules of different measurement resources on their respective bandwidths are the same.

[0168] Optionally, the pattern mapping rules of the different measurement resources on respective bandwidths satisfy at least one of the following:

[0169] a) Different measurement resources use the same RF link.

[0170] Optionally, the network side device may use the same radio frequency link to send measurement signals corresponding to measurement resources on different bandwidths, thereby avoiding phase amplitude jumps caused by hardware inconsistency.

[0171] b) Different measurement resources completely overlap in the time domain.

[0172] c) Different measurement resources are associated with the same transmit antenna port.

[0173] d) Different measurement resources are configured with the same transmit power. For example, the transmit power is the energy per resource element (EPRE).

[0174] e) Different measurement resources are configured with the same transmission period and slot offset;

[0175] f) Different measurement resources are configured with the same frequency domain interval, wherein the common reference point of the K bandwidths is the starting subcarrier index 0, and the intervals are the same frequency domain interval.

[0176] Optionally, the frequency domain interval represents the distribution density of the measurement resources in the frequency domain; no measurement resources are placed in the middle guard band between two bandwidths, but when counting the frequency domain interval, it is necessary to assume that the middle guard band between two bandwidths contains middle guard measurement resources.

[0177] g) Different measurement resources are configured with the same subcarrier size and cyclic prefix CP size.

[0178] Optionally, CSI compression is a direction of version evolution in the Multiple In Multiple Out (MIMO) direction. For example, the Type II-codebook of Release 16 (R16) introduces frequency domain compression, the codebook joint design under the coherent cooperative transmission (CJT) of R18, and compression in the time domain for channel prediction.

[0179] Optionally, the specific implementation of step 501 includes:

[0180] Mode 1: The network side device sends a CSI reporting configuration to the terminal, where the CSI reporting configuration is associated with the multiple bandwidths, and the CSI reporting configuration includes indication information for indicating K measurement resources associated with the multiple bandwidths;

[0181] or,

[0182] Mode 2: The network side device sends a CSI measurement configuration to the terminal, where the CSI measurement configuration includes indication information for indicating K measurement resources associated with the multiple bandwidths.

[0183] Optionally, the CSI reporting configuration is CSI-ReportConfig, and the CSI measurement configuration is CSI-MeasConfig. When the terminal performs CSI measurement, it configures a CSI reporting configuration (CSI-ReportConfig) or a CSI measurement configuration (CSI-MeasConfig) through high-layer signaling of a network-side device.

[0184] The terminal performs CSI measurement by configuring a CSI reporting configuration (CSI-ReportConfig) or a CSI measurement configuration (CSI-MeasConfig) through high-level signaling of the network-side device.

[0185] The network side device configures the CSI reporting configuration or the CSI reporting configuration through high-level signaling, and sends the configured CSI reporting configuration or the CSI reporting configuration to the terminal, and the terminal receives the CSI reporting configuration or the CSI reporting configuration sent by the network side device; wherein the CSI reporting configuration includes indication information for indicating K measurement resources associated with multiple bandwidths, that is, the CSI reporting configuration is associated with multiple bandwidths, and the CSI measurement configuration includes indication information for indicating K measurement resources associated with multiple bandwidths, that is, the CSI measurement configuration is also associated with multiple bandwidths.

[0186] For example, one CSI-ReportConfig may be associated with multiple bandwidth parts (BWPs) under one or more carriers (or serving cells), and these BWPs may be activated or inactivated.

[0187] After obtaining the CSI reporting configuration, the terminal can obtain K measurement resources based on the indication information of the K measurement resources associated with multiple bandwidths; or, after obtaining the CSI measurement configuration, the terminal can obtain K measurement resources based on the indication information of the K measurement resources associated with multiple bandwidths, so that the terminal can perform measurements on the K measurement resources to obtain a CSI report, thereby improving the flexibility of the CSI report measurement and the accuracy of the channel measurement, thereby improving the system performance.

[0188] Optionally, the multiple bandwidths are associated with at least one of the following distinctions:

[0189] (1) Carriers with different indexes.

[0190] (2) Serving cells with different indexes.

[0191] Optionally, when a CSI reporting configuration (CSI-ReportConfig) is associated with multiple carriers with different indexes or service cells with different indexes, one configuration method is that high-level signaling can be configured by configuring a carrier or service cell index list in the CSI-ReportConfig, and another configuration method is that a CSI-ReportConfig includes multiple sub-configurations, each sub-configuration is associated with a bandwidth, for example, associated with a carrier or a service cell.

[0192] If the reporting type of each sub-configuration is the same, for example, they are all feedback of Type 1 codebook (TypeI-codebook), then the report type is indicated in CSI-ReportConfig. If each sub-configuration is a different report type, the report type configuration is indicated in each sub-configuration, for example, some sub-configurations are feedback PMI and CQI, some sub-configurations are feedback L1-RSRP, some sub-configurations are feedback of enhanced Type 2 codebooks (eTypeII-codebooks) defined in different releases (Release) of the 5G NR protocol (for example, Rel 16, Rel 17, Rel 18, and Rel 18 continue to enhance the TypeII-codebook), and some sub-configurations are feedback TypeI-codebooks defined in R15.

[0193] (3) Partial bandwidth BWP of different indexes.

[0194] Optionally, when a CSI-ReportConfig is associated with multiple BWPs of different indexes, the associated CSI resource configuration (CSI-ResourceConfig) will be configured in the CSI-ReportingConfig, where the CSI-ResourceConfig indicates one or more CSI-RS resource sets (set(s)) for channel measurement.

[0195] One configuration method is that CSI-ReportingConfig is associated with multiple CSI-ResourceConfigs, and different CSI-ResourceConfigs are associated with different BWP indexes; another configuration method is that CSI-ResourceConfig is associated with one CSI-ResourceConfig, and the CSI-ResourceConfig is associated with one or more CSI-Resource sets. If CSI-ResourceConfig is associated with multiple CSI-Resource sets, different CSI-Resource sets are associated with different BWP indexes; if CSI-ResourceConfig is associated with one CSI-Resource set, the CSI-Resource set is associated with a BWP index list, or only associated with a nominal BWP indication, and the nominal BWP represents the aggregation of multiple BWPs, where the multiple BWPs include one activated BWP and other inactivated BWPs.

[0196] Optionally, BWPs with different indexes belong to the same carrier or serving cell.

[0197] (4) Different carriers or serving cells associated with a specific BWP.

[0198] Specifically, multiple bandwidths are associated with one specific BWP, and the specific BWP is associated with different carriers or service cells.

[0199] Optionally, when there are multiple valid subbands in the N subbands indicated by the CSI reporting configuration, the number of valid subbands in the N subbands is determined by the number of valid subbands indicated by the multiple bandwidths, and N is a positive integer.

[0200] Optionally, there is a frequency configuration report (reportFreqConfiguration) sub-configuration in the CSI reporting configuration, and the reportFreqConfiguration sub-configuration indicates the number and position of valid sub-bands in N sub-bands through a bitmap, and the number of valid sub-bands in N sub-bands is determined by the number of valid sub-bands indicated by multiple bandwidths. When the type of CSI report reported is an enhanced TypeII-codebook based on frequency domain compression (for example, Rel 16, Rel 17, Rel 18, and Rel 18 further enhanced TypeII-codebook), the terminal determines the length N3 of the compressed Fourier transform (Discrete Fourier Transform, DFT) basis in the frequency domain, which is associated with the number of valid sub-bands indicated by multiple bandwidths, that is, the number of valid sub-bands compressed in the frequency domain needs to accumulate the valid sub-bands on multiple bandwidths for calculation.

[0201] For example, high-level signaling (for example, there is a reportFreqConfiguration sub-configuration in the CSI reporting configuration, and the reportFreqConfiguration sub-configuration is indicated by a bitmap) indicates N1 valid sub-bands on bandwidth 1 and N2 valid sub-bands on bandwidth 2, then N3 = (N1 + N2) * R, or N3 = (N1 + N2) / R, where R can be a positive integer greater than or equal to 1. Furthermore, in order to ensure compression performance, there cannot be an invalid sub-band between the valid sub-bands on the two bandwidths.

[0202] Optionally, the CSI report includes a wideband channel quality indication CQI, and the wideband CQI is calculated based on the multiple bandwidths; or, the CSI report includes multiple wideband CQIs, and the feedback overhead of the wideband CQI is related to the number of bandwidths in the multiple bandwidths.

[0203] Optionally, when the reported CSI report is associated with multiple bandwidths and the CSI report includes CQI feedback, the CSI report may include one wideband CQI or multiple wideband CQIs.

[0204] When a wideband CQI feedback is included in the CSI report, that is, when 1 wideband CQI is fed back, the wideband CQI can be calculated based on multiple bandwidths; or, when multiple wideband CQI feedbacks are included in the CSI report, that is, when multiple wideband CQIs are fed back, the feedback overhead of the wideband CQI is related to the number of bandwidths in the multiple bandwidths, bit overhead = 4*K, where K is the number of bandwidths in the multiple bandwidths; or, bit overhead = 4+(K-1)*Z, indicating that the feedback overhead of feeding back a wideband CQI on a reference bandwidth is 4 bits, and other bandwidths use this as a reference to feed back Z-bit differential wideband CQIs.

[0205] Figure 6 is a schematic diagram of the interaction between the terminal and the network side device provided in the embodiment of the present application, such as Figure 6 As shown, it includes steps 601 to 603; wherein:

[0206] Step 601: The network side device sends a CSI reporting configuration or a CSI measurement configuration to the terminal, where the CSI reporting configuration is associated with multiple bandwidths, and the CSI reporting configuration includes indication information for indicating K measurement resources associated with the multiple bandwidths; the CSI measurement configuration includes indication information for indicating K measurement resources associated with the multiple bandwidths.

[0207] Step 602: The terminal performs measurement on K measurement resources and generates a CSI report.

[0208] Step 603: The terminal sends a CSI report to a network-side device.

[0209] The CSI reporting method provided in the embodiment of the present application may be executed by a CSI reporting device. In the embodiment of the present application, the CSI reporting device performing the CSI reporting method is taken as an example to illustrate the CSI reporting device provided in the embodiment of the present application.

[0210] Figure 7 is one of the structural diagrams of the CSI reporting device provided in the embodiment of the present application, such as Figure 7 As shown, the CSI reporting device 700 includes: an acquisition module 701, a measurement module 702 and a sending module 703; wherein:

[0211] An acquisition module 701 is used to acquire K measurement resources associated with multiple bandwidths, where K is an integer greater than or equal to 1;

[0212] The measurement module 702 is configured to perform measurement on the K measurement resources and generate a CSI report;

[0213] The sending module 703 is configured to send the CSI report.

[0214] The CSI reporting device provided in the embodiment of the present application can obtain K measurement resources associated with multiple bandwidths, perform measurements on the K measurement resources, generate a CSI report and report it, thereby realizing CSI joint feedback based on multiple bandwidth aggregation, which can reduce the signaling overhead of CSI reporting, improve the accuracy of channel measurement, and thus improve system performance.

[0215] Optionally, when K is equal to the number of the multiple bandwidths, different measurement resources are in a one-to-one correspondence with different bandwidths, and the K measurement resources satisfy at least one of the following:

[0216] The frequency domain resources occupied by different measurement resources do not overlap;

[0217] The frequency domain resources occupied by different measurement resources at least partially overlap, and the time domain resources occupied by different measurement resources do not overlap;

[0218] The pattern mapping rules of different measurement resources on their respective bandwidths are the same.

[0219] Optionally, the pattern mapping rules of the different measurement resources on respective bandwidths satisfy at least one of the following:

[0220] Different measurement resources use the same RF link;

[0221] Different measurement resources completely overlap in the time domain;

[0222] Different measurement resources are associated with the same transmit antenna port;

[0223] Different measurement resources are configured with the same transmit power;

[0224] Different measurement resources are configured with the same transmission period and time slot offset;

[0225] Different measurement resources are configured with the same frequency domain interval, wherein the common reference points of the K bandwidths are all starting subcarrier index 0 and are spaced with the same frequency domain interval;

[0226] Different measurement resources are configured with the same subcarrier size and cyclic prefix CP size.

[0227] Optionally, the acquisition module 701 is specifically configured to:

[0228] Acquire a CSI reporting configuration, where the CSI reporting configuration is associated with the multiple bandwidths, and the CSI reporting configuration includes indication information for indicating K measurement resources associated with the multiple bandwidths;

[0229] or,

[0230] A CSI measurement configuration is obtained, where the CSI measurement configuration includes indication information for indicating K measurement resources associated with the multiple bandwidths.

[0231] Optionally, the multiple bandwidths are associated with any one of the following:

[0232] Carriers with different indices;

[0233] Serving cells with different indexes;

[0234] Partial bandwidth BWP of different indexes;

[0235] Different carriers or serving cells are associated with a specific BWP.

[0236] Optionally, when the multiple bandwidths are associated with carriers of different indexes, or the multiple bandwidths are associated with serving cells of different indexes, the CSI reporting device 700 further includes:

[0237] A first determining module is used to determine, when the multiple bandwidths are associated with carriers of different indexes, or the multiple bandwidths are associated with serving cells of different indexes, the largest or smallest index among the indexes of the carriers or serving cells associated with the multiple bandwidths as a reference index;

[0238] Alternatively, determining a first index among the indices of the carriers or serving cells associated with the multiple bandwidths as a reference index;

[0239] Alternatively, determining one of the indexes of the carriers or serving cells associated with the multiple bandwidths indicated by the network side device as a reference index;

[0240] The reference index is used to calculate the priority of the CSI report.

[0241] Optionally, when there are multiple valid subbands in the N subbands indicated by the CSI reporting configuration, the number of valid subbands in the N subbands is determined by the number of valid subbands indicated by the multiple bandwidths, and N is a positive integer.

[0242] Optionally, the CSI reporting device 700 further includes at least one of the following:

[0243] A second determination module is configured to select a reference bandwidth from the multiple bandwidths; determine a subband size of the reference bandwidth; and determine the subband size of the reference bandwidth as a subband size of other bandwidths in the multiple bandwidths;

[0244] A third determining module, configured to select a maximum or minimum sub-band size from the respective sub-band sizes of each bandwidth in the multiple bandwidths, and determine the maximum or minimum sub-band size as the sub-band size of each bandwidth in the multiple bandwidths;

[0245] a fourth determining module, configured to determine the default sub-band size indicated by the network side device as the sub-band size of each bandwidth in the multiple bandwidths;

[0246] The fifth determination module is used to determine the subband size of each bandwidth in the multiple bandwidths based on the measurement bandwidth size, and the measurement bandwidth is associated with the multiple bandwidths; the measurement resources on different aggregate bandwidths are configured with the same subband size.

[0247] Optionally, a CSI processing capability required by the terminal to generate the CSI report is related to the number of bandwidths in the multiple bandwidths.

[0248] Optionally, the CSI report includes a wideband channel quality indication CQI, where the wideband CQI is calculated based on the multiple bandwidths;

[0249] Alternatively, the CSI report includes multiple wideband CQIs, and feedback overhead of the wideband CQI is related to the number of bandwidths in the multiple bandwidths.

[0250] Optionally, the CSI reporting device 700 further includes:

[0251] A sixth determining module, configured to determine a reference serving cell from the serving cells associated with the multiple bandwidths;

[0252] The seventh determination module is used to determine that the CQI of the reference serving cell is located in the first part of the CSI report, and the CQIs of other serving cells among the multiple bandwidth-associated serving cells except the reference serving cell are located in the second part of the CSI report.

[0253] Optionally, the sixth determining module is specifically used for at least one of the following:

[0254] Based on an instruction from a network-side device, determining the reference serving cell from the serving cells associated with the multiple bandwidths;

[0255] Determine a first serving cell among the multiple bandwidth-associated serving cells as the reference serving cell;

[0256] Determine a first CSI-RS-associated serving cell among the multiple bandwidth-associated serving cells as the reference serving cell;

[0257] A serving cell with the smallest or largest cell identification ID among the multiple bandwidth-associated serving cells is determined as the reference serving cell.

[0258] Optionally, when the second part of the CSI report is divided into Group 0, Group 1 and Group 2, the wideband CQI feedback associated with the CQI of the other service cells is located in Group 0, the even subband CQI in the subband CQI feedback associated with the CQI of the other service cells is located in Group 1, and the odd subband CQI in the subband CQI feedback associated with the CQI of the other service cells is located in Group 2.

[0259] Figure 8 This is a second structural diagram of a channel state information CSI reporting device provided in an embodiment of the present application, such as Figure 8 As shown, the channel state information CSI reporting device 800 includes a configuration module 801, wherein:

[0260] A configuration module 801 is used to configure K measurement resources associated with multiple bandwidths for a terminal, where K is an integer greater than or equal to 1;

[0261] The receiving module 802 is configured to receive a CSI report, where the CSI report is generated by measuring on the K measurement resources.

[0262] The CSI reporting device provided in the embodiment of the present application configures K measurement resources associated with multiple bandwidths for the terminal, so that the terminal can perform measurements on the K measurement resources, generate a CSI report and report it, thereby realizing CSI joint feedback based on multiple bandwidth aggregation, which can reduce the signaling overhead of CSI reporting, improve the accuracy of channel measurement, and thus improve system performance.

[0263] Optionally, when K is equal to the number of the multiple bandwidths, different measurement resources correspond to different bandwidths in a one-to-one correspondence, and the K measurement resources include at least one of the following:

[0264] The frequency domain resources occupied by different measurement resources do not overlap;

[0265] The frequency domain resources occupied by different measurement resources at least partially overlap, and the time domain resources occupied by different measurement resources do not overlap;

[0266] The pattern mapping rules of different measurement resources on their respective bandwidths are the same.

[0267] Optionally, the pattern mapping rules of the different measurement resources on respective bandwidths satisfy at least one of the following:

[0268] Different measurement resources use the same RF link;

[0269] Different measurement resources completely overlap in the time domain;

[0270] Different measurement resources are associated with the same transmit antenna port;

[0271] Different measurement resources are configured with the same transmit power;

[0272] Different measurement resources are configured with the same transmission period and time slot offset;

[0273] Different measurement resources are configured with the same frequency domain interval, wherein the common reference points of the K bandwidths are all starting subcarrier index 0 and are spaced with the same frequency domain interval;

[0274] Different measurement resources are configured with the same subcarrier size and cyclic prefix CP size.

[0275] Optionally, the configuration module 801 is specifically used to:

[0276] Sending a CSI reporting configuration to the terminal, where the CSI reporting configuration is associated with the multiple bandwidths, and the CSI reporting configuration includes indication information for indicating K measurement resources associated with the multiple bandwidths;

[0277] or,

[0278] A CSI measurement configuration is sent to the terminal, where the CSI measurement configuration includes indication information for indicating K measurement resources associated with the multiple bandwidths.

[0279] Optionally, the multiple bandwidths are associated with any one of the following:

[0280] Carriers with different indices;

[0281] Serving cells with different indexes;

[0282] Partial bandwidth BWP of different indexes;

[0283] Different carriers or serving cells are associated with a specific BWP.

[0284] Optionally, when there are multiple valid subbands in the N subbands indicated by the CSI reporting configuration, the number of valid subbands in the N subbands is determined by the number of valid subbands indicated by the multiple bandwidths.

[0285] Optionally, the CSI report includes a wideband channel quality indication CQI, where the wideband CQI is calculated based on the multiple bandwidths;

[0286] Alternatively, the CSI report includes multiple wideband CQIs, and feedback overhead of the wideband CQI is related to the number of bandwidths in the multiple bandwidths.

[0287] The channel state information CSI reporting device in the embodiment of the present application may be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or a chip. The electronic device may be a terminal, or may be another device other than a terminal. Exemplarily, the terminal may include but is not limited to the types of terminals 11 listed above, and other devices may be servers, network attached storage (NAS), etc., which are not specifically limited in the embodiment of the present application.

[0288] The channel state information CSI reporting device provided in the embodiment of the present application can achieve Figures 2 to 6 The various processes implemented by the method embodiment and achieving the same technical effect are not described here to avoid repetition.

[0289] like Fig. 9 As shown, the embodiment of the present application further provides a communication device 900, including a processor 901 and a memory 902, and the memory 902 stores a program or instruction that can be run on the processor 901. For example, when the communication device 900 is a terminal, the program or instruction is executed by the processor 901 to implement the various steps of the above-mentioned channel state information CSI reporting method embodiment, and can achieve the same technical effect. When the communication device 900 is a network side device, the program or instruction is executed by the processor 901 to implement the various steps of the above-mentioned channel state information CSI reporting method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0290] The embodiment of the present application also provides a terminal, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the following Figure 2 The steps in the method embodiment shown. This terminal embodiment corresponds to the above-mentioned terminal side method embodiment, and each implementation process and implementation method of the above-mentioned method embodiment can be applied to this terminal embodiment and can achieve the same technical effect. Specifically, Fig.10 A schematic diagram of the hardware structure of a terminal for implementing an embodiment of the present application.

[0291] The terminal 1000 includes but is not limited to: a radio frequency unit 1001, a network module 1002, an audio output unit 1003, an input unit 1004, a sensor 1005, a display unit 1006, a user input unit 1007, an interface unit 1008, a memory 1009 and at least some of the components of a processor 1010.

[0292] Those skilled in the art will appreciate that the terminal 1000 may also include a power source (such as a battery) for supplying power to various components, and the power source may be logically connected to the processor 1010 through a power management system, thereby implementing functions such as managing charging, discharging, and power consumption management through the power management system. Fig.10 The terminal structure shown in the figure does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently, which will not be described in detail here.

[0293] It should be understood that in the embodiment of the present application, the input unit 1004 may include a graphics processing unit (GPU) 10041 and a microphone 10042, and the graphics processing unit 10041 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 1006 may include a display panel 10061, and the display panel 10061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 1007 includes a touch panel 10071 and at least one of other input devices 10072. The touch panel 10071 is also called a touch screen. The touch panel 10071 may include two parts: a touch detection device and a touch controller. Other input devices 10072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0294] In the embodiment of the present application, after receiving downlink data from the network side device, the RF unit 1001 can transmit the data to the processor 1010 for processing; in addition, the RF unit 1001 can send uplink data to the network side device. Generally, the RF unit 1001 includes but is not limited to an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

[0295] The memory 1009 can be used to store software programs or instructions and various data. The memory 1009 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instruction required for at least one function (such as a sound playback function, an image playback function, etc.), etc. In addition, the memory 1009 may include a volatile memory or a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDRSDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM) and a direct memory bus random access memory (DRRAM). The memory 1009 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0296] The processor 1010 may include one or more processing units; optionally, the processor 1010 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to an operating system, a user interface, and application programs, and the modem processor mainly processes wireless communication signals, such as a baseband processor. It is understandable that the modem processor may not be integrated into the processor 1010.

[0297] The processor 1010 is configured to obtain K measurement resources associated with multiple bandwidths, where K is an integer greater than or equal to 1; perform measurements on the K measurement resources to generate a CSI report; and send the CSI report.

[0298] The terminal obtains K measurement resources associated with multiple bandwidths. The terminal can perform measurements on the K measurement resources, generate a CSI report and report it, thereby realizing CSI joint feedback based on multiple bandwidth aggregation, which can reduce the signaling overhead of CSI reporting, improve the accuracy of channel measurement, and thus improve system performance.

[0299] It can be understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of the CSI reporting method in the method embodiment, and achieve the same or corresponding technical effect. To avoid repetition, it will not be repeated here.

[0300] The embodiment of the present application also provides a network side device, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the following Figure 5 The steps of the method embodiment shown. This network side device embodiment corresponds to the above network side device method embodiment, and each implementation process and implementation mode of the above method embodiment can be applied to this network side device embodiment and can achieve the same technical effect.

[0301] Specifically, the embodiment of the present application also provides a network side device. Fig.11 As shown, the network side device 1100 includes: an antenna 1101, a radio frequency device 1102, a baseband device 1103, a processor 1104 and a memory 1105. The antenna 1101 is connected to the radio frequency device 1102. In the uplink direction, the radio frequency device 1102 receives information through the antenna 1101 and sends the received information to the baseband device 1103 for processing. In the downlink direction, the baseband device 1103 processes the information to be sent and sends it to the radio frequency device 1102. The radio frequency device 1102 processes the received information and sends it out through the antenna 1101.

[0302] The method executed by the network-side device in the above embodiment may be implemented in the baseband device 1103 , which includes a baseband processor.

[0303] The baseband device 1103 may include, for example, at least one baseband board on which a plurality of chips are arranged. Fig.11 As shown, one of the chips is, for example, a baseband processor, which is connected to the memory 1105 through a bus interface to call the program in the memory 1105 to execute the network device operations shown in the above method embodiment.

[0304] The network side device may further include a network interface 1106, which is, for example, a Common Public Radio Interface (CPRI).

[0305] Specifically, the network side device 1100 of the embodiment of the present application further includes: instructions or programs stored in the memory 1105 and executable on the processor 1104, and the processor 1104 calls the instructions or programs in the memory 1105 to execute Fig.11 The methods executed by the modules shown achieve the same technical effects, and therefore will not be described here in detail to avoid repetition.

[0306] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, each process of the above-mentioned channel state information CSI reporting method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0307] The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk. In some examples, the readable storage medium may be a non-transient readable storage medium.

[0308] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned channel state information CSI reporting method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0309] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0310] An embodiment of the present application further provides a computer program / program product, which is stored in a storage medium, and is executed by at least one processor to implement the various processes of the above-mentioned channel state information CSI reporting method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0311] An embodiment of the present application also provides a channel state information CSI reporting system, including: a terminal and a network side device, wherein the terminal can be used to execute the steps of the channel state information CSI reporting method on the terminal side as described above, and the network side device can be used to execute the steps of the channel state information CSI reporting method on the network side device side as described above.

[0312] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0313] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of a computer software product plus a necessary general hardware platform, and of course, can also be implemented by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, disk, CD, etc.), including several instructions to enable a terminal or a network-side device to execute the methods described in each embodiment of the present application.

[0314] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms of implementation methods without departing from the purpose of the present application and the scope of protection of the claims, and these implementation methods are all within the protection of the present application.

Claims

1. A method for reporting channel state information (CSI), characterized in that: include: The terminal obtains K measurement resources associated with multiple bandwidths, where K is an integer greater than or equal to 1; The terminal performs measurement on the K measurement resources and generates a CSI report; The terminal sends the CSI report.

2. The CSI reporting method according to claim 1, characterized in that: When K is equal to the number of the multiple bandwidths, different measurement resources correspond to different bandwidths in a one-to-one correspondence, and the K measurement resources satisfy at least one of the following: The frequency domain resources occupied by different measurement resources do not overlap; The frequency domain resources occupied by different measurement resources at least partially overlap, and the time domain resources occupied by different measurement resources do not overlap; The pattern mapping rules of different measurement resources on their respective bandwidths are the same.

3. The CSI reporting method according to claim 2, characterized in that: The pattern mapping rules of the different measurement resources on their respective bandwidths satisfy at least one of the following: Different measurement resources use the same RF link; Different measurement resources completely overlap in the time domain; Different measurement resources are associated with the same transmit antenna port; Different measurement resources are configured with the same transmit power; Different measurement resources are configured with the same transmission period and time slot offset; Different measurement resources are configured with the same frequency domain interval, wherein the common reference points of the K bandwidths are all starting subcarrier index 0 and are spaced with the same frequency domain interval; Different measurement resources are configured with the same subcarrier size and cyclic prefix CP size.

4. The CSI reporting method according to any one of claims 1 to 3, characterized in that: The terminal obtains K measurement resources associated with multiple bandwidths, including: The terminal acquires a CSI reporting configuration, where the CSI reporting configuration is associated with the multiple bandwidths, and the CSI reporting configuration includes indication information for indicating K measurement resources associated with the multiple bandwidths; or, The terminal obtains a CSI measurement configuration, where the CSI measurement configuration includes indication information for indicating K measurement resources associated with the multiple bandwidths.

5. The CSI reporting method according to any one of claims 1 to 4, characterized in that: The multiple bandwidths are associated with any of the following: Carriers with different indices; Serving cells with different indexes; Partial bandwidth BWP of different indexes; Different carriers or serving cells are associated with a specific BWP.

6. The CSI reporting method according to claim 5, characterized in that: In the case where the multiple bandwidths are associated with carriers of different indexes, or the multiple bandwidths are associated with serving cells of different indexes, the method further includes: The terminal determines, as a reference index, a maximum or minimum index among the indexes of the carriers or serving cells associated with the multiple bandwidths; Alternatively, the terminal determines a first index among the indices of the carriers or serving cells associated with the multiple bandwidths as a reference index; Alternatively, the terminal determines one of the indexes of the carriers or serving cells associated with the multiple bandwidths as a reference index; The reference index is used to calculate the priority of the CSI report.

7. The CSI reporting method according to any one of claims 4, characterized in that: When there are multiple valid subbands in the N subbands indicated by the CSI reporting configuration, the number of valid subbands in the N subbands is determined by the number of valid subbands indicated by the multiple bandwidths, and N is a positive integer.

8. The CSI reporting method according to any one of claims 1 to 7, characterized in that: The method further comprises at least one of the following: The terminal selects a reference bandwidth from the multiple bandwidths; determines a subband size of the reference bandwidth; and determines the subband size of the reference bandwidth as a subband size of other bandwidths in the multiple bandwidths; The terminal selects a maximum or minimum subband size from the subband sizes of each bandwidth in the multiple bandwidths, and determines the maximum or minimum subband size as the subband size of each bandwidth in the multiple bandwidths; The terminal determines the default subband size indicated by the network side device as the subband size of each bandwidth in the multiple bandwidths; The terminal determines a subband size of each bandwidth in the multiple bandwidths based on the measurement bandwidth size, and the measurement bandwidth is associated with the multiple bandwidths; and measurement resources on different bandwidths are configured with the same subband size.

9. The CSI reporting method according to any one of claims 1 to 8, characterized in that: The CSI processing capability required by the terminal to generate the CSI report is related to the number of bandwidths in the multiple bandwidths.

10. The CSI reporting method according to any one of claims 1 to 9, characterized in that: The CSI report includes a wideband channel quality indication CQI, where the wideband CQI is calculated based on the multiple bandwidths; or, The CSI report includes a plurality of wideband CQIs, and feedback overhead of the wideband CQIs is related to the number of bandwidths in the plurality of bandwidths.

11. The CSI reporting method according to claim 10, characterized in that: The method further comprises: The terminal determines a reference serving cell from the serving cells associated with the multiple bandwidths; The terminal determines that the CQI of the reference serving cell is located in a first part of the CSI report, and the CQIs of other serving cells among the multiple bandwidth-associated serving cells except the reference serving cell are located in a second part of the CSI report.

12. The CSI reporting method according to claim 11, characterized in that: The terminal determines, from the serving cells associated with the multiple bandwidths, a reference serving cell, including at least one of the following: The terminal determines, based on an instruction from a network-side device, the reference serving cell from the serving cells associated with the multiple bandwidths; The terminal determines, as the reference serving cell, a first serving cell among the multiple bandwidth-associated serving cells; The terminal determines, as the reference serving cell, a first CSI-RS-associated serving cell among the multiple bandwidth-associated serving cells; The terminal determines, among the multiple bandwidth-associated serving cells, a serving cell having a smallest or largest cell identification ID as the reference serving cell.

13. The CSI reporting method according to claim 11, characterized in that: In a case where the second part of the CSI report is divided into Group 0, Group 1, and Group 2, the wideband CQI feedback associated with the CQI of the other service cells is located in Group 0, the even subband CQI in the subband CQI feedback associated with the CQI of the other service cells is located in Group 1, and the odd subband CQI in the subband CQI feedback associated with the CQI of the other service cells is located in Group 2.

14. A method for reporting channel state information (CSI), characterized in that: include: The network side device configures K measurement resources associated with multiple bandwidths for the terminal, where K is an integer greater than or equal to 1; The network side device receives a CSI report, where the CSI report is generated by measuring on the K measurement resources.

15. The CSI reporting method according to claim 14, characterized in that: When K is equal to the number of the multiple bandwidths, different measurement resources correspond to different bandwidths in a one-to-one correspondence, and the K measurement resources include at least one of the following: The frequency domain resources occupied by different measurement resources do not overlap; The frequency domain resources occupied by different measurement resources at least partially overlap, and the time domain resources occupied by different measurement resources do not overlap; The pattern mapping rules of different measurement resources on their respective bandwidths are the same.

16. The CSI reporting method according to claim 15, characterized in that: The pattern mapping rules of the different measurement resources on their respective bandwidths satisfy at least one of the following: Different measurement resources use the same RF link; Different measurement resources completely overlap in the time domain; Different measurement resources are associated with the same transmit antenna port; Different measurement resources are configured with the same transmit power; Different measurement resources are configured with the same transmission period and time slot offset; Different measurement resources are configured with the same frequency domain interval, wherein the common reference points of the K bandwidths are all starting subcarrier index 0 and are spaced with the same frequency domain interval; Different measurement resources are configured with the same subcarrier size and cyclic prefix CP size.

17. The CSI reporting method according to any one of claims 14 to 16, characterized in that: The network side device configures K measurement resources associated with multiple bandwidths for the terminal, including: The network side device sends a CSI reporting configuration to the terminal, where the CSI reporting configuration is associated with the multiple bandwidths, and the CSI reporting configuration includes indication information for indicating K measurement resources associated with the multiple bandwidths; or, The network side device sends a CSI measurement configuration to the terminal, where the CSI measurement configuration includes indication information for indicating K measurement resources associated with the multiple bandwidths.

18. The CSI reporting method according to any one of claims 14 to 17, characterized in that: The multiple bandwidths are associated with any of the following: Carriers with different indices; Serving cells with different indexes; Partial bandwidth BWP of different indexes; Different carriers or serving cells are associated with a specific BWP.

19. The CSI reporting method according to claim 17, characterized in that: When there are multiple valid subbands in the N subbands indicated by the CSI reporting configuration, the number of valid subbands in the N subbands is determined by the number of valid subbands indicated by the multiple bandwidths.

20. The CSI reporting method according to any one of claims 14 to 19, characterized in that: The CSI report includes a wideband channel quality indication CQI, where the wideband CQI is calculated based on the multiple bandwidths; Alternatively, the CSI report includes multiple wideband CQIs, and feedback overhead of the wideband CQI is related to the number of bandwidths in the multiple bandwidths.

21. A channel state information (CSI) reporting device, characterized in that: include: An acquisition module, used to acquire K measurement resources associated with multiple bandwidths, where K is an integer greater than or equal to 1; A measurement module, configured to perform measurement on the K measurement resources and generate a CSI report; A sending module is used to send the CSI report.

22. A channel state information (CSI) reporting device, characterized in that: include: A configuration module, configured to configure K measurement resources associated with multiple bandwidths for the terminal, where K is an integer greater than or equal to 1; The receiving module is used to receive a CSI report, where the CSI report is generated by measuring on the K measurement resources.

23. 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 CSI reporting method according to any one of claims 1 to 13 are implemented.

24. 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 CSI reporting method according to any one of claims 14 to 20 are implemented.

25. 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 CSI reporting method as described in any one of claims 1 to 13, or implements the steps of the CSI reporting method as described in any one of claims 14 to 20.

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