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

Abstract

The present application relates to the technical field of communications, and discloses a channel state information (CSI) reporting method, a terminal, and a network side device. The CSI reporting method in embodiments of the present application comprises: a terminal acquires 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

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

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application number 202311031463.X filed in China on August 15, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] 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

[0004] 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 (BWP) under a certain carrier.

[0005] Because CSI reports associated with different carriers or serving cells are independently configured in existing protocols, when a terminal is configured for carrier aggregation transmission, such as continuous carrier aggregation within an intra-band, the channel characteristics of several adjacent carriers may be highly correlated. Similar redundant information may also exist in the corresponding CSI reports, such as information in the feedback codebook that characterizes the beam direction, delay profile, and Doppler characteristics, resulting in high CSI reporting signaling overhead. When the bandwidth configured with the BWP is small, the channel measurement performance will suffer from performance loss in terms of noise immunity and channel multipath resolution compared to configurations with larger bandwidths, resulting in low channel measurement accuracy.

[0006] Summary of the Invention

[0007] 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 high CSI reporting signaling overhead and low channel measurement accuracy.

[0008] In a first aspect, a channel state information (CSI) reporting method is provided, which is executed by a terminal and includes:

[0009] The terminal obtains K measurement resources associated with multiple bandwidths, where K is an integer greater than or equal to 1;

[0010] The terminal performs measurement on the K measurement resources and generates a CSI report;

[0011] The terminal sends the CSI report.

[0012] In a second aspect, a channel state information (CSI) reporting method is provided, which is executed by a network-side device and includes:

[0013] 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;

[0014] The network-side device receives a CSI report, where the CSI report is generated by performing measurement on the K measurement resources.

[0015] In a third aspect, a channel state information (CSI) reporting device is provided, including:

[0016] an acquisition module, configured to acquire K measurement resources associated with a plurality of bandwidths, where K is an integer greater than or equal to 1;

[0017] a measurement module, configured to perform measurements on the K measurement resources and generate a CSI report;

[0018] A sending module is used to send the CSI report.

[0019] In a fourth aspect, a channel state information (CSI) reporting device is provided, including:

[0020] 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;

[0021] The receiving module is configured to receive a CSI report, where the CSI report is generated by performing measurement on the K measurement resources.

[0022] 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.

[0023] 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, 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.

[0024] 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.

[0025] 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 and generate a CSI report.

[0026] In the ninth aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method described in the second aspect are implemented.

[0027] In the tenth aspect, a wireless communication system is provided, comprising: a terminal and a network side device, wherein the terminal can be used to execute the steps of the method described in the first aspect, and the network side device can be used to execute the steps of the method described in the second aspect.

[0028] In the eleventh aspect, a chip is provided, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the method as described in the first aspect, or to implement the method as described in the second aspect.

[0029] 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.

[0030] 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 joint CSI 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

[0031] FIG1 is a schematic diagram of a wireless communication system applicable to an embodiment of the present application;

[0032] FIG2 is a flow chart of a CSI reporting method according to an embodiment of the present application;

[0033] FIG3 is a schematic diagram of an NZP CSI-RS resource distributed over two bandwidths provided in an embodiment of the present application;

[0034] FIG4 is a schematic diagram of two NZP CSI-RS resources associated with carriers or serving cells provided in an embodiment of the present application;

[0035] FIG5 is a second flow chart of the CSI reporting method provided in an embodiment of the present application;

[0036] FIG6 is a schematic diagram of interaction between a terminal and a network-side device provided in an embodiment of the present application;

[0037] FIG7 is a schematic diagram of a structure of a CSI reporting device according to an embodiment of the present application;

[0038] FIG8 is a second structural diagram of a CSI reporting device provided in an embodiment of the present application;

[0039] FIG9 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0040] FIG10 is a schematic structural diagram of a terminal provided in an embodiment of the present application;

[0041] FIG11 is a schematic diagram of the structure of the network side device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0042] The following will be combined with the accompanying drawings in the embodiments of this application to clearly describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0043] The terms "first", "second", etc. in this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same type, and do not limit the number of objects, for example, the first object can be one or more. In addition, "or" in this application represents at least one of the connected objects. For example, "A or B" covers three options, namely, Option 1: including A but not including B; Option 2: including B but not including A; Option 3: including both A and B. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0044] The term "indication" in this application can be either a direct indication (or explicit indication) or an indirect indication (or implicit indication). A direct indication can be understood as the sender explicitly informing the receiver of specific information, the operation to be performed, or the requested result, etc. in the instruction sent; an indirect indication can be understood as the receiver determining the corresponding information based on the instruction sent by the sender, or making a judgment and determining the operation to be performed or the requested result, etc. based on the judgment result.

[0045] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) or other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the technology described can be used for the systems and radio technologies mentioned above, as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and NR terminology is used in most of the following description, but these technologies can also be applied to systems other than NR systems, such as 6th generation (6G) systems. th Generation, 6G) communication system.

[0046] FIG1 is a block diagram of a wireless communication system applicable to an embodiment of the present application. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 may be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), a notebook computer, a personal digital assistant (PDA), a handheld computer, a netbook, an ultra-mobile personal computer (UMPC), a mobile internet device (MID), an augmented reality (AR), a virtual reality (VR) device, a robot, a wearable device (Wearable Device), an aircraft (Flight Vehicle), a vehicle-mounted device (VUE), a ship-mounted device, a pedestrian user equipment (PUE), a smart home (home appliances with wireless communication capabilities, such as refrigerators, televisions, washing machines, or furniture), a game console, a personal computer (PC), an ATM, or a self-service machine, or other terminal-side devices. Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle-mounted device can also be called a vehicle-mounted terminal, a vehicle-mounted controller, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip or a vehicle-mounted unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 may include an access network device or a core network device, wherein the access network device may also be called a radio access network (Radio Access Network, RAN) device, a radio access network function or a radio access network unit. The access network device may include a base station, a wireless local area network (WLAN) access point (AP) or a wireless fidelity (WiFi) node, etc.Among them, the base station can be referred to as Node B (NB), Evolved Node B (eNB), the next generation Node B (gNB), New Radio Node B (NR Node B), access point, Relay Base Station (RBS), Serving Base Station (SBS), Base Transceiver Station (BTS), radio base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), Home Node B (HNB), Home evolved Node B (home evolved Node B), Transmission Reception Point (TRP) or other appropriate terms in the field. As long as the same technical effect is achieved, the base station is not limited to specific technical vocabulary. It should be noted that in the embodiment of the present application, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited.

[0047] 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 (MME), access mobility management function (AMF), session management function (SMF), user plane function (UPF), policy control function (PCF), policy and charging rules function unit (PCRF), edge application service discovery function (EASDF), unified data management (UDM), unified data repository (UDR), home user server (HSS), centralized network configuration (CNC), network storage function (NRF), network exposure function (NEF), local NEF (L-NEF), binding support function (BSF), application function ( 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.

[0048] 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.

[0049] 1. User Equipment (UE) CSI reporting rules:

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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 constraints of limited time-frequency resources, some low-priority CSI-reportings are discarded. The NR protocol (38.214 5.2.5 section) provides a priority formula, which is expressed by formula (1): iCSI (y,k,c,s)=2·N cells ·M s y+N cells ·M s k+M s ·c+s (1)

[0054] Where s represents the CSI reporting ID, M s Indicates the maximum reporting number configured by the high-level layer, c represents the serving cell index (or carrier index), N cellsIndicates the maximum number of serving cells supported by higher-layer configuration; k = 0 indicates that the current CSI Reporting carries Layer 1 Reference Signal Received Power (L1-RSRP) or L1 Signal-to-Noise and Interference Ratio (SINR); k = 1 indicates that it does not carry; y = 0 indicates that AP-CSI reporting is carried on the physical uplink shared channel (PUSCH); y = 1 indicates that SP-CSI reporting is carried on the PUSCH; y = 2 indicates that SP-CSI reporting is carried on the physical uplink control channel (PUCCH); y = 3 indicates that P-CSI reporting is carried on the PUCCH.

[0055] The CSI reporting method provided in the embodiments of the present application is described in detail below with reference to some embodiments and their application scenarios in conjunction with the accompanying drawings.

[0056] 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 CSI reporting scenarios. The terminal obtains K measurement resources associated with multiple bandwidths, and can perform measurements on the K measurement resources, generate a CSI report, and report it, thereby realizing joint CSI feedback based on multiple bandwidth aggregation. It can reduce the signaling overhead of CSI reporting, improve the accuracy of channel measurement, and thus improve system performance.

[0057] FIG2 is a flow chart of a CSI reporting method according to an embodiment of the present application. As shown in FIG2 , the method includes steps 201 to 203; wherein:

[0058] Step 201: The terminal obtains K measurement resources associated with multiple bandwidths, where K is an integer greater than or equal to 1.

[0059] 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. The embodiments of the present application do not limit this.

[0060] Optionally, the K measurement resources include at least one of the following:

[0061] K non-zero power CSI reference signal resources (NZP CSI-RS resources);

[0062] Measurement resources occupied by K synchronization signal / physical broadcast channel blocks (Synchronization Signal and PBCH blocks, SSB);

[0063] K measurement resources for interference measurement;

[0064] 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 associated with different bandwidths in a one-to-one correspondence.

[0065] Optionally, the terminal performs CSI measurement based on K measurement resources associated with multiple bandwidths. There are two potential configurations:

[0066] 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. The terminal performs CSI measurement on the multiple bandwidths associated with the measurement resource based on the measurement resource and reports the measured CSI report.

[0067] For example, when the measurement resource is an NZP CSI-RS resource, the two associated bandwidths are associated with different carriers or serving cells, respectively. Figure 3 is a schematic diagram of an NZP CSI-RS resource distributed across two bandwidths, as provided in an embodiment of the present application. As shown in Figure 3, some resource elements (REs) of an NZP CSI-RS resource are distributed across the bandwidth of associated serving cell 1 (Serving cell index 1), and the other resource elements are distributed across the bandwidth of associated serving cell 2 (Serving cell index 2).

[0068] Configuration 2: When K is greater than 1, K measurement resources are configured. Different measurement resources correspond to different bandwidths in a one-to-one relationship. Based on the K measurement resources, the terminal performs CSI measurement on multiple bandwidths associated with the K measurement resources, generates a CSI report, and reports the measured CSI report. This implements joint channel measurement based on at least one of multiple bandwidth NZP CSI-RS resources, measurement resources occupied by SSBs, and measurement resources used for interference measurement, and compresses CSI feedback, thereby improving channel measurement accuracy.

[0069] When the measurement resources are two NZP CSI-RS resources, the two NZP CSI-RS resources are associated with different carriers or serving cells. Figure 4 is a schematic diagram of two NZP CSI-RS resources associated with carriers or serving cells according to an embodiment of the present application. As shown in Figure 4, CSI-RS resource 1 is associated with serving cell 1, and CSI-RS resource 2 is associated with serving cell 2.

[0070] CSI compression is a key aspect of MIMO (Multiple In Multiple Out) evolution. For example, Release 16 (R16) introduced frequency-domain compression with the Type II codebook, while Release 18 introduced joint codebook design for coherent joint transmission (CJT) and channel prediction using time-domain compression.

[0071] Step 202: The terminal performs measurement on the K measurement resources and generates a CSI report.

[0072] Optionally, after acquiring K measurement resources associated with multiple bandwidths, the terminal may perform measurement on the K measurement resources and generate a CSI report.

[0073] Step 203: The terminal sends the CSI report.

[0074] Optionally, after generating a CSI report, the terminal sends the CSI report to the network side device.

[0075] 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 joint CSI feedback based on multiple bandwidth aggregation. It can reduce the signaling overhead of CSI reporting, improve the accuracy of channel measurement, and thus improve system performance.

[0076] 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 satisfy at least one of the following:

[0077] 1) The frequency domain resources occupied by different measurement resources do not overlap;

[0078] 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.

[0079] 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.

[0080] 3) The pattern mapping rules of different measurement resources on their respective bandwidths are the same.

[0081] Optionally, the pattern mapping rules of the different measurement resources on their respective bandwidths satisfy at least one of the following:

[0082] a) Different measurement resources use the same RF link.

[0083] 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 and amplitude jumps caused by hardware inconsistency.

[0084] b) Different measurement resources completely overlap in the time domain.

[0085] c) Different measurement resources are associated with the same transmit antenna port.

[0086] d) Different measurement resources are configured with the same transmit power. For example, the transmit power is the energy per resource element (EPRE).

[0087] e) Different measurement resources are configured with the same transmission period and slot offset;

[0088] 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.

[0089] 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 the two bandwidths.

[0090] g) Different measurement resources are configured with the same subcarrier size and cyclic prefix CP size.

[0091] Optionally, a specific implementation of step 201 includes:

[0092] 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;

[0093] or,

[0094] 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.

[0095] 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.

[0096] The network-side device configures a CSI reporting configuration or a CSI reporting configuration through high-layer signaling, and sends the configured CSI reporting configuration or the CSI reporting configuration to the terminal. The terminal receives the CSI reporting configuration or the CSI reporting configuration sent by the network-side device. The CSI reporting configuration includes indication information for indicating K measurement resources associated with multiple bandwidths, i.e., the CSI reporting configuration is associated with multiple bandwidths. The CSI measurement configuration includes indication information for indicating K measurement resources associated with multiple bandwidths, i.e., the CSI measurement configuration is also associated with multiple bandwidths.

[0097] 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.

[0098] 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; alternatively, 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. The terminal can then perform measurements on the K measurement resources to obtain a CSI report, thereby improving the flexibility of CSI report measurement and the accuracy of channel measurement, thereby improving system performance.

[0099] Optionally, the multiple bandwidths are associated with at least one of the following:

[0100] (1) Carriers with different indexes.

[0101] (2) Serving cells with different indexes.

[0102] Optionally, when a CSI reporting configuration (CSI-ReportConfig) is associated with multiple carriers of different indexes or service cells of different indexes, one configuration method is that high-layer 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.

[0103] If the reporting type of each sub-configuration is the same, for example, all are feedback of Type 1 codebook (TypeI-codebook), then the report type is indicated in CSI-ReportConfig. If each sub-configuration has a different report type, the report type configuration is indicated in each sub-configuration. For example, some sub-configurations feedback precoding matrix indicator (PMI) and channel quality indicator (CQI), some sub-configurations feedback L1-RSRP, some sub-configurations feedback enhanced Type II codebook (eTypeII-codebook) defined in different releases (Release) of the 5G NR protocol (for example, Rel 16, Rel 17, Rel 18, and the TypeII-codebook further enhanced in Rel 18), and some sub-configurations feedback the TypeI-codebook defined in R15.

[0104] (3) Partial bandwidth BWP of different indexes.

[0105] Optionally, when a CSI-ReportConfig is associated with multiple BWPs of different indexes, the CSI-ReportingConfig will be configured with the associated CSI resource configuration (CSI-ResourceConfig), where the CSI-ResourceConfig indicates one or more CSI-RS resource sets (set(s)) for channel measurement.

[0106] One configuration method is to associate a CSI-ReportingConfig with multiple CSI-ResourceConfigs, with different CSI-ResourceConfigs associated with different BWP indices. Another configuration method is to associate a CSI-ResourceConfig with one CSI-ResourceConfig, with the CSI-ResourceConfig associated with one or more CSI-Resource sets. If a CSI-ResourceConfig is associated with multiple CSI-Resource sets, different CSI-Resource sets are associated with different BWP indices. If a CSI-ResourceConfig is associated with one CSI-Resource set, the CSI-Resource set is associated with a list of BWP indices or only a nominal BWP indication, which represents the aggregation of multiple BWPs, where the multiple BWPs include one activated BWP and other inactivated BWPs.

[0107] Optionally, BWPs with different indexes belong to the same carrier or serving cell.

[0108] (4) Different carriers or serving cells associated with a specific BWP.

[0109] Specifically, multiple bandwidths are associated with one specific BWP, and the specific BWP is associated with different carriers or serving cells.

[0110] Optionally, in the case where the multiple bandwidths are associated with carriers of different indices, or the multiple bandwidths are associated with service cells of different indices, the terminal determines the largest or smallest 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.

[0111] 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 high-priority CSI reports.

[0112] When determining that the parameters in the CSI report priority formula are related to the index of the serving cell, and 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.

[0113] The determination of the reference index includes: in the case of multiple bandwidth-associated carriers with different indexes, or multiple bandwidth-associated service cells with different indexes, the terminal determines the largest or smallest index among the multiple indexes in the multiple bandwidth-associated carrier index list or the service cell index list 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 of the multiple bandwidth-associated carrier list or the service cell list 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 multiple bandwidth-associated carrier list or the service cell list 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 implements the priority calculation of the CSI report, enables the terminal to give priority to reporting high-priority CSI reports, and improves the flexibility of CSI reporting.

[0114] 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.

[0115] 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.

[0116] Optionally, the CSI reporting configuration includes a frequency configuration report (reportFreqConfiguration) sub-configuration. The reportFreqConfiguration sub-configuration indicates the number and positions 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 Type II codebook based on frequency domain compression (for example, Rel 16, Rel 17, Rel 18, or a Type II codebook further enhanced by Rel 18), the terminal determines the length N3 of the compressed Discrete Fourier Transform (DFT) basis in the frequency domain, which is associated with the number of valid sub-bands indicated by the multiple bandwidths.

[0117] For example, if higher-layer signaling (e.g., the CSI reporting configuration includes a reportFreqConfiguration sub-configuration, which is 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, to ensure compression performance, invalid subbands cannot exist between valid subbands on the two bandwidths.

[0118] 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.

[0119] 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.

[0120] Table 1. Configurable subband sizes

[0121] When CSI reporting is associated with multiple bandwidths, if the different bandwidths have different sizes, as described in Table 1 above, different subband sizes may occur, resulting in unevenness in the joint CSI calculation. When CSI reporting involves sub-band-based calculations, the subband size must be consistent across different bandwidths.

[0122] The terminal selects a reference bandwidth from multiple bandwidths and 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. This ensures that the sub-band sizes of different bandwidths remain consistent, which can improve the accuracy of CSI calculation.

[0123] For example, there are two bandwidths: Bandwidth 1 is 64 PRBs with a subbandsize of 8, while Bandwidth 2 is 270 PRBs with a subbandsize of 32. To ensure that both bandwidths have the same subband size, the terminal can select Bandwidth 2 as the reference bandwidth from the two associated bandwidths, determine the subband size of Bandwidth 2, and then use the subband size of Bandwidth 2 as the subband size of Bandwidth 1 in Bandwidth 1 and Bandwidth 2. This can improve the accuracy of CSI calculation.

[0124] 2) The terminal selects a maximum or minimum subband size from the respective 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.

[0125] Optionally, the terminal selects the largest or smallest subband size from the subband sizes of each of the multiple bandwidths and determines it as the subband size for each of the multiple bandwidths. This ensures that the subband sizes of different bandwidths remain consistent, which can improve the accuracy of CSI calculation. For example, the largest subband size of 32 is selected and determined as the subband size of bandwidth 1 in bandwidth 1 and bandwidth 2.

[0126] 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.

[0127] Optionally, the terminal can use the default subband size indicated by the network device as the subband size for each of the multiple bandwidths, ensuring consistent subband sizes across different bandwidths and improving CSI calculation accuracy. This redefines the BWP, which is the sum of all bandwidths, and then finds the corresponding subband size from Table 1. If the BWP exceeds 275 PRBs, a new subband size must be defined for each of the remaining 275 PRBs.

[0128] 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; measurement resources on different aggregated bandwidths are configured with the same subband size.

[0129] Optionally, the sub-band size is associated with the measurement bandwidth size, where the measurement bandwidth is associated with multiple bandwidths. Based on the measurement bandwidth size, the terminal can determine the sub-band size for each of the multiple bandwidths. By configuring the same sub-band size for measurement resources on different aggregated bandwidths, the sub-band sizes across different bandwidths remain consistent, improving the accuracy of CSI calculation.

[0130] Optionally, the CSI processing capability required by the terminal to generate the CSI report is related to the number of bandwidths in the multiple bandwidths.

[0131] Optionally, when the reported CSI report is associated with multiple bandwidths, the CSI processing unit (CPU) required by 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.

[0132] 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, the new number of CPUs is defined as Pnew = Y*P, or Pnew = P+X, where Y and X are both related to the number of bandwidths in the multiple aggregated bandwidths, and Y and X can also be capabilities reported by the terminal.

[0133] 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.

[0134] Optionally, the CSI report includes a wideband channel quality indicator (CQI), where the wideband CQI is calculated based on the multiple bandwidths; or, the CSI report includes multiple wideband CQIs, where the feedback overhead of the wideband CQI is related to the number of bandwidths in the multiple bandwidths.

[0135] 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 one 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.

[0136] 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.

[0137] 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 the channel measurement.

[0138] 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:

[0139] (1) The terminal determines the reference serving cell from the multiple bandwidth-associated serving cells based on an instruction from a network-side device.

[0140] Optionally, the network device may indicate which of the multiple bandwidth-associated serving cells is a reference serving cell, and the terminal may determine the reference serving cell from the multiple bandwidth-associated serving cells based on the indication of the network device. For example, if the terminal determines that the CQI of a reference serving cell is located in Part 1 of the CSI report, the reference serving cell may be determined based on the indication of the network device.

[0141] (2) The terminal determines the first serving cell among the multiple bandwidth-associated serving cells as the reference serving cell.

[0142] 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.

[0143] (3) The terminal determines the first CSI-RS-associated serving cell among the multiple bandwidth-associated serving cells as the reference serving cell.

[0144] For example, there are multiple bandwidth-associated serving cell lists {2, 1, 3}, and the serving cell associated with the first CSI-RS is 1. The terminal determines serving cell 1 as the reference serving cell.

[0145] (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.

[0146] For example, if there are multiple bandwidth-associated serving cell lists {2, 1, 3} and 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.

[0147] 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.

[0148] FIG5 is a second flow chart of a CSI reporting method provided in an embodiment of the present application. As shown in FIG5 , the method includes step 501; wherein:

[0149] 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.

[0150] Step 502: The network-side device receives a CSI report, where the CSI report is generated by measuring on the K measurement resources.

[0151] Optionally, the K measurement resources include at least one of the following:

[0152] K non-zero power CSI reference signal resources;

[0153] The measurement resources occupied by K SSBs;

[0154] K measurement resources for interference measurement;

[0155] 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 associated with different bandwidths in a one-to-one correspondence.

[0156] Optionally, the terminal performs CSI measurement based on K measurement resources associated with multiple bandwidths. There are two potential configurations:

[0157] 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. The terminal performs CSI measurement on the multiple bandwidths associated with the measurement resource based on the measurement resource and reports the measured CSI report.

[0158] For example, when the measurement resource is an NZP CSI-RS resource, the two associated bandwidths are associated with different carriers or serving cells. As shown in Figure 3, some resource elements of an NZP CSI-RS resource are distributed over the bandwidth of associated serving cell 1, and the other resource elements are distributed over the bandwidth of associated serving cell 2.

[0159] Configuration 2: When K is greater than 1, K measurement resources are configured. Different measurement resources correspond to different bandwidths in a one-to-one relationship. Based on the K measurement resources, the terminal performs CSI measurement on multiple bandwidths associated with the K measurement resources, generates a CSI report, and reports the measured CSI report. This implements joint channel measurement based on at least one of multiple bandwidth NZP CSI-RS resources, measurement resources occupied by SSBs, and measurement resources used for interference measurement, and compresses CSI feedback, thereby improving channel measurement accuracy.

[0160] When the measurement resources are two NZP CSI-RS resources, the two NZP CSI-RS resources are associated with different carriers or serving cells. As shown in Figure 4, CSI-RS resource 1 is associated with serving cell 1, and CSI-RS resource 2 is associated with serving cell 2.

[0161] CSI compression is a key aspect of MIMO (Multiple In Multiple Out) evolution. For example, Release 16 (R16) introduced frequency-domain compression with the Type II codebook, while Release 18 introduced joint codebook design for coherent joint transmission (CJT) and channel prediction using time-domain compression.

[0162] After obtaining 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.

[0163] The CSI reporting method provided in the embodiment of the present application configures K measurement resources associated with multiple bandwidths for a 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 joint CSI 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.

[0164] 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 satisfy at least one of the following:

[0165] 1) The frequency domain resources occupied by different measurement resources do not overlap;

[0166] 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.

[0167] 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.

[0168] 3) The pattern mapping rules of different measurement resources on their respective bandwidths are the same.

[0169] Optionally, the pattern mapping rules of the different measurement resources on their respective bandwidths satisfy at least one of the following:

[0170] a) Different measurement resources use the same RF link.

[0171] 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 and amplitude jumps caused by hardware inconsistency.

[0172] b) Different measurement resources completely overlap in the time domain.

[0173] c) Different measurement resources are associated with the same transmit antenna port.

[0174] d) Different measurement resources are configured with the same transmit power. For example, the transmit power is the energy per resource element (EPRE).

[0175] e) Different measurement resources are configured with the same transmission period and slot offset;

[0176] 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.

[0177] 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 the two bandwidths, but when counting the frequency domain interval, it is necessary to assume that the middle guard band between the two bandwidths contains the middle protection measurement resources.

[0178] g) Different measurement resources are configured with the same subcarrier size and cyclic prefix CP size.

[0179] Optionally, CSI compression is a direction of evolution in the Multiple In Multiple Out (MIMO) direction. For example, the Type II-codebook of Release 16 (R16) introduced frequency domain compression, and the coherent collaborative transmission (CJT) of R18 introduced joint codebook design under joint transmission, as well as compression in the time domain for channel prediction.

[0180] Optionally, a specific implementation of step 501 includes:

[0181] 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;

[0182] or,

[0183] 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.

[0184] 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.

[0185] The terminal performs CSI measurement by configuring a CSI reporting configuration (CSI-ReportConfig) or a CSI measurement configuration (CSI-MeasConfig) through high-layer signaling of the network-side device.

[0186] The network-side device configures a CSI reporting configuration or a CSI reporting configuration through high-layer signaling, and sends the configured CSI reporting configuration or the CSI reporting configuration to the terminal. The terminal receives the CSI reporting configuration or the CSI reporting configuration sent by the network-side device. The CSI reporting configuration includes indication information for indicating K measurement resources associated with multiple bandwidths, i.e., the CSI reporting configuration is associated with multiple bandwidths. The CSI measurement configuration includes indication information for indicating K measurement resources associated with multiple bandwidths, i.e., the CSI measurement configuration is also associated with multiple bandwidths.

[0187] 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.

[0188] 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; alternatively, 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. The terminal can then perform measurements on the K measurement resources to obtain a CSI report, thereby improving the flexibility of CSI report measurement and the accuracy of channel measurement, thereby improving system performance.

[0189] Optionally, the multiple bandwidths are associated with at least one of the following distinctions:

[0190] (1) Carriers with different indexes.

[0191] (2) Serving cells with different indexes.

[0192] Optionally, when a CSI reporting configuration (CSI-ReportConfig) is associated with multiple carriers of different indexes or service cells of different indexes, one configuration method is that high-layer 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.

[0193] If the reporting type of each sub-configuration is the same, for example, all are feedback of the Type 1 codebook (Type I-codebook), then the report type is indicated in the CSI-ReportConfig. If each sub-configuration has a different report type, the report type configuration is indicated in each sub-configuration. For example, some sub-configurations feedback PMI and CQI, some sub-configurations feedback L1-RSRP, some sub-configurations feedback the enhanced Type II codebook (eType II-codebook) defined in different releases (Release) of the 5G NR protocol (for example, Rel 16, Rel 17, Rel 18, and the Type II-codebook further enhanced by Rel 18), and some sub-configurations feedback the Type I-codebook defined in R15.

[0194] (3) Partial bandwidth BWP of different indexes.

[0195] Optionally, when a CSI-ReportConfig is associated with multiple BWPs of different indexes, the CSI-ReportingConfig will be configured with the associated CSI resource configuration (CSI-ResourceConfig), where the CSI-ResourceConfig indicates one or more CSI-RS resource sets (set(s)) for channel measurement.

[0196] One configuration method is to associate a CSI-ReportingConfig with multiple CSI-ResourceConfigs, with different CSI-ResourceConfigs associated with different BWP indexes. Another configuration method is to associate a CSI-ResourceConfig with one CSI-ResourceConfig, with the CSI-ResourceConfig associated with one or more CSI-Resource sets. If a CSI-ResourceConfig is associated with multiple CSI-Resource sets, different CSI-Resource sets are associated with different BWP indexes. If a CSI-ResourceConfig is associated with one CSI-Resource set, the CSI-Resource set is associated with one BWP index list or only one nominal BWP indication, which represents the aggregation of multiple BWPs, where the multiple BWPs include one activated BWP and other inactivated BWPs.

[0197] Optionally, BWPs with different indexes belong to the same carrier or serving cell.

[0198] (4) Different carriers or serving cells associated with a specific BWP.

[0199] Specifically, multiple bandwidths are associated with a specific BWP, and the specific BWP is associated with different carriers or serving cells.

[0200] 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.

[0201] Optionally, the CSI reporting configuration includes a frequency configuration report (reportFreqConfiguration) sub-configuration. The reportFreqConfiguration sub-configuration indicates the number and position of valid subbands in N subbands through a bitmap. The number of valid subbands in N subbands is determined by the number of valid subbands indicated by multiple bandwidths. When the type of CSI report reported is an enhanced Type II codebook based on frequency domain compression (e.g., Rel 16, Rel 17, Rel 18, or a Type II codebook further enhanced by Rel 18), the terminal determines the length N3 of the compressed Discrete Fourier Transform (DFT) basis in the frequency domain, which is associated with the number of valid subbands indicated by multiple bandwidths. That is, the number of valid subbands for frequency domain compression needs to be calculated by accumulating the valid subbands across multiple bandwidths.

[0202] For example, if higher-layer signaling (e.g., the CSI reporting configuration includes a reportFreqConfiguration sub-configuration, which is a bitmap) indicates N1 valid sub-bands in bandwidth 1 and N2 valid sub-bands in 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, to ensure compression performance, no invalid sub-bands can exist between the valid sub-bands in the two bandwidths.

[0203] 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.

[0204] 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.

[0205] When a CSI report includes one wideband CQI feedback, that is, one wideband CQI is fed back, the wideband CQI can be calculated based on multiple bandwidths. Alternatively, when a CSI report includes multiple wideband CQI feedbacks, that is, multiple wideband CQIs are fed back, the wideband CQI feedback overhead 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. Alternatively, bit overhead = 4+(K-1)*Z, indicating that the feedback overhead of feeding back one wideband CQI on one reference bandwidth is 4 bits, and the other bandwidths use this as a reference to feed back Z-bit differential wideband CQIs.

[0206] FIG6 is a schematic diagram of interaction between a terminal and a network-side device provided in an embodiment of the present application, as shown in FIG6 , including steps 601 to 603; wherein:

[0207] Step 601: The network-side device sends a CSI reporting configuration or a CSI measurement configuration to the terminal. The CSI reporting configuration is associated with multiple bandwidths. 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.

[0208] Step 602: The terminal performs measurement on K measurement resources and generates a CSI report.

[0209] Step 603: The terminal sends a CSI report to the network side device.

[0210] 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.

[0211] FIG7 is a schematic diagram of a structure of a CSI reporting device according to an embodiment of the present application. As shown in FIG7 , the CSI reporting device 700 includes: an acquisition module 701, a measurement module 702, and a sending module 703; wherein:

[0212] An acquisition module 701 is configured to acquire K measurement resources associated with multiple bandwidths, where K is an integer greater than or equal to 1;

[0213] The measurement module 702 is configured to perform measurement on the K measurement resources and generate a CSI report;

[0214] The sending module 703 is configured to send the CSI report.

[0215] 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 joint CSI 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.

[0216] 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 satisfy at least one of the following:

[0217] The frequency domain resources occupied by different measurement resources do not overlap;

[0218] 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;

[0219] Different measurement resources have the same pattern mapping rules on their respective bandwidths.

[0220] Optionally, the pattern mapping rules of the different measurement resources on their respective bandwidths satisfy at least one of the following:

[0221] Different measurement resources use the same RF link;

[0222] Different measurement resources completely overlap in the time domain;

[0223] Different measurement resources are associated with the same transmit antenna port;

[0224] Different measurement resources are configured with the same transmit power;

[0225] Different measurement resources are configured with the same transmission period and time slot offset;

[0226] 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 at the same frequency domain interval;

[0227] Different measurement resources are configured with the same subcarrier size and cyclic prefix CP size.

[0228] Optionally, the acquisition module 701 is specifically configured to:

[0229] 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;

[0230] or,

[0231] A CSI measurement configuration is obtained, where the CSI measurement configuration includes indication information for indicating K measurement resources associated with the multiple bandwidths.

[0232] Optionally, the multiple bandwidths are associated with any one of the following:

[0233] Carriers of different indices;

[0234] Serving cells with different indexes;

[0235] Partial bandwidth BWP of different indexes;

[0236] Different carriers or serving cells associated with a specific BWP.

[0237] 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:

[0238] A first determining module is configured to, when the multiple bandwidths are associated with carriers of different indexes, or the multiple bandwidths are associated with serving cells of different indexes, determine a maximum or minimum index among the indices of the multiple bandwidth-associated carriers or serving cells as a reference index;

[0239] Alternatively, determining a first index among the indices of the carriers or serving cells associated with the multiple bandwidths as a reference index;

[0240] 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;

[0241] The reference index is used to calculate the priority of the CSI report.

[0242] 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.

[0243] Optionally, the CSI reporting device 700 further includes at least one of the following:

[0244] A second determining 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;

[0245] a third determining module, configured to select a maximum or minimum subband size from the respective subband sizes of each bandwidth in the multiple bandwidths, and determine the maximum or minimum subband size as the subband size of each bandwidth in the multiple bandwidths;

[0246] 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;

[0247] The fifth determining module is configured to determine a subband size of each bandwidth in the multiple bandwidths based on a measurement bandwidth size, where the measurement bandwidth is associated with the multiple bandwidths; and measurement resources on different aggregated bandwidths are configured with the same subband size.

[0248] Optionally, the CSI processing capability required by the terminal to generate the CSI report is related to the number of bandwidths in the multiple bandwidths.

[0249] Optionally, the CSI report includes a wideband channel quality indicator CQI, where the wideband CQI is calculated based on the multiple bandwidths;

[0250] Alternatively, the CSI report includes multiple wideband CQIs, and feedback overhead of the wideband CQIs is related to the number of bandwidths in the multiple bandwidths.

[0251] Optionally, the CSI reporting device 700 further includes:

[0252] a sixth determining module, configured to determine a reference serving cell from the plurality of bandwidth-associated serving cells;

[0253] The seventh determination module is configured to determine that the CQI of the reference serving cell is located in the first part of the CSI report, and the CQIs of the 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.

[0254] Optionally, the sixth determining module is specifically configured to perform at least one of the following:

[0255] Determining the reference serving cell from the plurality of bandwidth-associated serving cells based on an instruction from a network-side device;

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

[0257] Determine a first CSI-RS-associated serving cell among the multiple bandwidth-associated serving cells as the reference serving cell;

[0258] The serving cell with the smallest or largest cell identification ID among the multiple bandwidth-associated serving cells is determined as the reference serving cell.

[0259] 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.

[0260] FIG8 is a second structural diagram of a channel state information (CSI) reporting apparatus provided in an embodiment of the present application. As shown in FIG8 , the channel state information (CSI) reporting apparatus 800 includes a configuration module 801, wherein:

[0261] A configuration module 801 is configured to configure K measurement resources associated with multiple bandwidths for a terminal, where K is an integer greater than or equal to 1;

[0262] The receiving module 802 is configured to receive a CSI report, where the CSI report is generated by measuring on the K measurement resources.

[0263] 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 joint CSI 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.

[0264] 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:

[0265] The frequency domain resources occupied by different measurement resources do not overlap;

[0266] 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;

[0267] Different measurement resources have the same pattern mapping rules on their respective bandwidths.

[0268] Optionally, the pattern mapping rules of the different measurement resources on their respective bandwidths satisfy at least one of the following:

[0269] Different measurement resources use the same RF link;

[0270] Different measurement resources completely overlap in the time domain;

[0271] Different measurement resources are associated with the same transmit antenna port;

[0272] Different measurement resources are configured with the same transmit power;

[0273] Different measurement resources are configured with the same transmission period and time slot offset;

[0274] 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 at the same frequency domain interval;

[0275] Different measurement resources are configured with the same subcarrier size and cyclic prefix CP size.

[0276] Optionally, the configuration module 801 is specifically configured to:

[0277] 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;

[0278] or,

[0279] Sending 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.

[0280] Optionally, the multiple bandwidths are associated with any one of the following:

[0281] Carriers of different indices;

[0282] Serving cells with different indexes;

[0283] Partial bandwidth BWP of different indexes;

[0284] Different carriers or serving cells associated with a specific BWP.

[0285] 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.

[0286] Optionally, the CSI report includes a wideband channel quality indicator CQI, where the wideband CQI is calculated based on the multiple bandwidths;

[0287] Alternatively, the CSI report includes multiple wideband CQIs, and feedback overhead of the wideband CQIs is related to the number of bandwidths in the multiple bandwidths.

[0288] The channel state information (CSI) reporting device in the embodiments of the present application can be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or chip. The electronic device can be a terminal or other device other than a terminal. For example, the terminal can include but is not limited to the types of terminal 11 listed above, and other devices can include servers, network attached storage (NAS), etc., which are not specifically limited in the embodiments of the present application.

[0289] The channel state information CSI reporting device provided in the embodiment of the present application can implement the various processes implemented in the method embodiments of Figures 2 to 6 and achieve the same technical effects. To avoid repetition, they will not be described here.

[0290] As shown in Figure 9, an embodiment of the present application further provides a communication device 900, including a processor 901 and a memory 902. 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.

[0291] 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 configured to execute a program or instruction to implement the steps of the method embodiment shown in FIG2 . This terminal embodiment corresponds to the aforementioned terminal-side method embodiment, and each implementation process and implementation method of the aforementioned method embodiment is applicable to this terminal embodiment and can achieve the same technical effects. Specifically, FIG10 is a schematic diagram of the hardware structure of a terminal implementing an embodiment of the present application.

[0292] 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 the processor 1010.

[0293] Those skilled in the art will appreciate that the terminal 1000 may also include a power supply (such as a battery) to power various components. The power supply may be logically connected to the processor 1010 via a power management system, thereby enabling the power management system to manage charging, discharging, and power consumption. The terminal structure shown in FIG10 does not limit the terminal. The terminal may include more or fewer components than shown, or may combine certain components, or have different component arrangements, which will not be described in detail here.

[0294] It should be understood that in an 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 an operating stick, which will not be repeated here.

[0295] In the embodiment of the present application, after receiving downlink data from a network-side device, the RF unit 1001 may transmit the data to the processor 1010 for processing. Furthermore, the RF unit 1001 may send uplink data to the network-side device. Typically, the RF unit 1001 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, and the like.

[0296] 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, applications or instructions required for at least one function (such as a sound playback function, an image playback function, 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.

[0297] Processor 1010 may include one or more processing units. Optionally, processor 1010 integrates an application processor and a modem processor. The application processor primarily handles operations related to the operating system, user interface, and application programs, while the modem processor primarily processes wireless communication signals, such as a baseband processor. It is understood that the modem processor may not be integrated into processor 1010.

[0298] 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.

[0299] The terminal obtains K measurement resources associated with multiple bandwidths, performs measurements on these K measurement resources, generates a CSI report, and reports it, thereby implementing joint CSI feedback based on the aggregation of multiple bandwidths. This can reduce the signaling overhead of CSI reporting, improve the accuracy of channel measurement, and thus enhance system performance.

[0300] 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 effects. To avoid repetition, it will not be repeated here.

[0301] 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 configured to execute a program or instruction to implement the steps of the method embodiment shown in FIG5 . This network-side device embodiment corresponds to the aforementioned network-side device method embodiment, and each implementation process and implementation method of the aforementioned method embodiment are applicable to this network-side device embodiment and can achieve the same technical effects.

[0302] Specifically, embodiments of the present application also provide a network-side device. As shown in Figure 11, 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. Antenna 1101 is connected to radio frequency device 1102. In the uplink direction, radio frequency device 1102 receives information via antenna 1101 and sends the received information to baseband device 1103 for processing. In the downlink direction, baseband device 1103 processes the information to be transmitted and sends it to radio frequency device 1102. Radio frequency device 1102 processes the received information and then sends it through antenna 1101.

[0303] 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.

[0304] The baseband device 1103 may, for example, include at least one baseband board, on which multiple chips are arranged, as shown in Figure 11, 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 and execute the network device operations shown in the above method embodiment.

[0305] The network side device may further include a network interface 1106 , which is, for example, a Common Public Radio Interface (CPRI).

[0306] Specifically, the network side device 1100 of the embodiment of the present application also includes: instructions or programs stored in the memory 1105 and executable on the processor 1104. The processor 1104 calls the instructions or programs in the memory 1105 to execute the methods executed by the modules shown in FIG11 and achieve the same technical effect. To avoid repetition, they will not be elaborated here.

[0307] 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, the various processes of the above-mentioned channel state information CSI reporting method embodiment are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0308] The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk. In some examples, the readable storage medium may be a non-transitory readable storage medium.

[0309] 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.

[0310] 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.

[0311] An embodiment of the present application further provides a computer program / program product, which is stored in a storage medium and executed by at least one processor to implement the various processes of the above-mentioned channel state information CSI reporting method embodiment, and can achieve the same technical effect. To avoid repetition, it is not repeated here.

[0312] 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 terminal-side channel state information (CSI) reporting method as described above, and the network-side device can be used to execute the steps of the network-side device-side channel state information (CSI) reporting method as described above.

[0313] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0314] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of a computer software product plus a necessary general-purpose hardware platform, or of course, by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.) and includes a number of instructions for enabling a terminal or network-side device to execute the methods described in each embodiment of the present application.

[0315] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms of implementation methods without departing from the purpose of this application and the scope of protection of the claims. These implementation methods are all within the protection of this application.

Claims

1. A channel state information (CSI) reporting method, comprising: 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, wherein: 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, wherein: 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, wherein: 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, wherein: 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, wherein: 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, wherein: 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, wherein: 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; The subband size of the reference bandwidth is determined as the 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, wherein: 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, wherein: 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, wherein: 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, wherein: 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, wherein: 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 channel state information (CSI) reporting method, comprising: 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, wherein: 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, wherein: 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, wherein: 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, wherein: 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, wherein: 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, wherein: 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, comprising: 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, comprising: 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, 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 CSI reporting method according to any one of claims 1 to 13 are implemented.

24. A network side device, comprising a processor and a memory, wherein the memory stores a program or instruction that can be executed 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 storing a program or instruction, wherein the program or instruction, when executed by a processor, 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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