Method and apparatus for reporting channel state information or method and apparatus for receiving channel state information, and communication system

Abstract

Provided in the embodiments of the present application are a method and apparatus for reporting channel state information or a method and apparatus for receiving channel state information, and a communication system. The method for reporting channel state information comprises: receiving a channel state information reference signal resource configuration, which corresponds to X channel state information reference signal resource sets used for time-frequency information tracking, wherein each channel state information reference signal resource set comprises at least one tracking reference signal resource, and X is an integer greater than or equal to 1; and on the basis of the tracking reference signal resources, reporting channel state information based on a multi-point joint transmission.

Description

Method, device and communication system for reporting or receiving channel state information Technical Field

[0001] The embodiments of the present application relate to the field of communication technologies. Background Art

[0002] In the new radio (NR) system, the user can measure the current channel according to the channel state information (CSI) resource settings and channel state information reporting settings configured on the base station side, and report feedback through the uplink control information (UCI) in the uplink channel (such as the physical uplink control channel (PUCCH) and the physical uplink shared channel (PUSCH)) carrying CSI.

[0003] The multiple-transmission reception point (M-TRP) collaborative transmission scheme is a key technology in NR systems for improving cell-edge throughput and providing more balanced quality of service for serving cells. M-TRP transmission schemes can be broadly categorized into two types: C-JT (coherent joint transmission) and NC-JT (non-coherent joint transmission).

[0004] It should be noted that the above introduction to the technical background is merely intended to provide a clear and complete description of the technical solutions of this application and facilitate understanding by those skilled in the art. Simply because these solutions are described in the background technology section of this application, it should not be assumed that the above technical solutions are well known to those skilled in the art.

[0005] Summary of the Invention

[0006] The inventors discovered that existing transmission schemes, such as the C-JT scheme, only consider data and / or reference signal transmission under ideal scenarios (e.g., ideal backhaul, ideal synchronization, etc.). However, in real-world scenarios, the geographical locations of different transmission points lead to significant differences in their delay and frequency offset characteristics. Consequently, when channels with different signals are superimposed at varying delays and frequency offsets, the signals cannot achieve complete synchronous transmission, nor can they achieve ideal coherent transmission. Current precoding and CSI feedback methods fail to address this issue.

[0007] Furthermore, non-ideal backhaul caused by radio frequency units at different transmission points can also cause delays and asynchrony between transmission points and the central processing unit (CU). As a result, even with enhanced CSI feedback, the CSI information fed back by the user equipment (UE) still cannot accurately and completely reflect the actual channel status and quality experienced by the C-JT resource ports, thereby reducing the accuracy and reliability of data scheduling, resulting in reduced data transmission performance, and lower single-user and overall network throughput.

[0008] In response to at least one of the above problems or other similar problems, embodiments of the present application provide a method, apparatus, and communication system for reporting or receiving channel state information.

[0009] According to one aspect of an embodiment of the present application, an apparatus for reporting channel state information is provided, which is configured in a terminal device, and the apparatus includes: a receiving unit, which receives a channel state information reference signal resource configuration, where the channel state information reference signal resource configuration corresponds to X channel state information reference signal resource sets for time-frequency information tracking, each of the channel state information reference signal resource sets including at least one tracking reference signal resource, where X is an integer greater than or equal to 1; and a processing unit, which reports channel state information based on multi-point joint transmission based on the tracking reference signal resources.

[0010] According to another aspect of an embodiment of the present application, a method for reporting channel state information is provided, which is applied to a terminal device, the method comprising: receiving a channel state information reference signal resource configuration, the channel state information reference signal resource configuration corresponding to X channel state information reference signal resource sets for time-frequency information tracking, each of the channel state information reference signal resource sets including at least one tracking reference signal resource, where X is an integer greater than or equal to 1; and reporting channel state information based on multi-point joint transmission according to the tracking reference signal resources.

[0011] According to another aspect of an embodiment of the present application, an apparatus for receiving channel state information is provided, which is configured in a network device, the apparatus comprising: a sending unit, which sends a channel state information reference signal resource configuration, where the channel state information reference signal resource configuration corresponds to X channel state information reference signal resource sets for time-frequency information tracking, each of the channel state information reference signal resource sets including at least one tracking reference signal resource, where X is an integer greater than or equal to 1; and a receiving unit, which receives channel state information based on multi-point joint transmission.

[0012] According to another aspect of an embodiment of the present application, a method for receiving channel state information is provided, which is applied to a network device. The method includes: sending a channel state information reference signal resource configuration, where the channel state information reference signal resource configuration corresponds to X channel state information reference signal resource sets for time-frequency information tracking, each of the channel state information reference signal resource sets including at least one tracking reference signal resource, where X is an integer greater than or equal to 1; and receiving channel state information based on multi-point joint transmission.

[0013] According to another aspect of an embodiment of the present application, a communication system is provided, comprising a network device and a terminal device, wherein the network device sends a channel state information reference signal resource configuration, the channel state information reference signal resource configuration corresponding to X channel state information reference signal resource sets for time-frequency information tracking, each of the channel state information reference signal resource sets including at least one tracking reference signal resource, X being an integer greater than or equal to 1, and receiving channel state information based on multi-point joint transmission; the terminal device receives the channel state information reference signal resource configuration, and reports the channel state information based on the tracking reference signal resources.

[0014] One of the beneficial effects of the embodiments of the present application is that the terminal device can report the channel state information based on multi-point joint transmission based on the tracking reference signal resources in the channel state information reference signal resource set used for time-frequency information tracking, which helps the network device to perform time-frequency synchronization of multiple transmission points based on the channel state information, thereby improving transmission efficiency, enhancing data transmission performance, and increasing single-user and network overall throughput.

[0015] With reference to the following description and accompanying drawings, specific embodiments of the present application are disclosed in detail, indicating the manner in which the principles of the present application can be employed. It should be understood that the embodiments of the present application are not limited in scope. Within the spirit and scope of the appended claims, the embodiments of the present application include many variations, modifications and equivalents.

[0016] Features described and / or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.

[0017] It should be emphasized that the term "include / comprising" when used herein refers to the presence of features, integers, steps or components, but does not exclude the presence or addition of one or more other features, integers, steps or components. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The elements and features described in one figure or one embodiment of the present application can be combined with the elements and features shown in one or more other figures or embodiments. In addition, in the accompanying drawings, similar reference numerals represent corresponding parts in several figures and can be used to indicate corresponding parts used in more than one embodiment.

[0019] FIG1 is a schematic diagram of a communication system according to an embodiment of the present application;

[0020] FIG2 is a schematic diagram of a transmission scheme;

[0021] FIG3 is a schematic diagram of a method for reporting channel state information according to an embodiment of the present application;

[0022] FIG4 is a schematic diagram of resource configuration according to an embodiment of the present application;

[0023] FIG5 is another schematic diagram of resource configuration according to an embodiment of the present application;

[0024] FIG6 is another schematic diagram of resource configuration according to an embodiment of the present application;

[0025] FIG7 is another schematic diagram of resource configuration according to an embodiment of the present application;

[0026] FIG8 is another schematic diagram of resource configuration according to an embodiment of the present application;

[0027] FIG9 is another schematic diagram of resource configuration according to an embodiment of the present application;

[0028] FIG10 is a schematic diagram of an apparatus for reporting channel state information according to an embodiment of the present application;

[0029] FIG11 is a schematic diagram of a method for receiving channel state information according to an embodiment of the present application;

[0030] FIG12 is a schematic diagram of an apparatus for receiving channel state information according to an embodiment of the present application;

[0031] FIG13 is a schematic diagram of a network device according to an embodiment of the present application;

[0032] FIG14 is a schematic diagram of a terminal device according to an embodiment of the present application. DETAILED DESCRIPTION

[0033] The above and other features of the present application will become apparent through the following description with reference to the accompanying drawings. In the description and the accompanying drawings, specific embodiments of the present application are disclosed in detail, which illustrate some embodiments in which the principles of the present application can be adopted. It should be understood that the present application is not limited to the described embodiments. On the contrary, the present application includes all modifications, variations and equivalents that fall within the scope of the appended claims.

[0034] In the embodiments of the present application, the terms "first", "second", etc. are used to distinguish different elements from the name, but do not indicate the spatial arrangement or temporal order of these elements, and these elements should not be limited by these terms. The term "and / or" includes any one and all combinations of one or more of the associated listed terms. The terms "comprising", "including", "having", etc. refer to the presence of the stated features, elements, components or components, but do not exclude the presence or addition of one or more other features, elements, components or components.

[0035] In the embodiments of this application, the singular forms "a," "the," etc. include plural forms and should be broadly understood to mean "a" or "a type" rather than being limited to "one." Furthermore, the term "said" should be understood to include both singular and plural forms, unless the context clearly indicates otherwise. Furthermore, the term "according to" should be understood to mean "at least in part based on...", and the term "based on" should be understood to mean "at least in part based on...", unless the context clearly indicates otherwise.

[0036] In the embodiments of the present application, the term "communication network" or "wireless communication network" may refer to a network that complies with any of the following communication standards, such as Long Term Evolution (LTE), enhanced Long Term Evolution (LTE-A, LTE-Advanced), Wideband Code Division Multiple Access (WCDMA), High-Speed ​​Packet Access (HSPA), etc.

[0037] Furthermore, communication between devices in the communication system may be carried out according to communication protocols of any stage, for example, including but not limited to the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G and 5G, New Radio (NR), 6G, etc., and / or other communication protocols currently known or to be developed in the future.

[0038] In the embodiments of the present application, the term "network device" refers to, for example, a device in a communication system that connects a terminal device to a communication network and provides services for the terminal device. Network devices may include, but are not limited to, the following devices: base station (BS), access point (AP), transmission reception point (TRP), transmission point (TP), broadcast transmitter, mobile management entity (MME), gateway, server, radio network controller (RNC), base station controller (BSC), etc.

[0039] Base stations may include, but are not limited to, NodeB (NB), evolved NodeB (eNodeB or eNB), 5G base stations (gNB), IAB hosts, and the like. They may also include remote radio heads (RRHs), remote radio units (RRUs), relays, or low-power nodes (e.g., femto, pico, etc.). The term "base station" may include some or all of their functions, and each base station may provide communication coverage for a specific geographic area. The term "cell" may refer to a base station and / or its coverage area, depending on the context in which the term is used.

[0040] In the embodiments of the present application, the term "user equipment" (UE) refers to, for example, a device that accesses a communication network through a network device and receives network services, and may also be referred to as "terminal equipment" (TE). Terminal equipment may be fixed or mobile, and may also be referred to as a mobile station (MS), terminal, user, subscriber station (SS), access terminal (AT), station, mobile terminal (MT), etc.

[0041] Terminal devices may include, but are not limited to, the following devices: cellular phones, personal digital assistants (PDAs), wireless modems, wireless communication devices, handheld devices, machine-type communication devices, laptop computers, cordless phones, smartphones, smart watches, digital cameras, etc.

[0042] For another example, in scenarios such as the Internet of Things (IoT), the terminal device can also be a machine or device for monitoring or measurement, including but not limited to: machine type communication (MTC) terminal, vehicle-mounted communication terminal, device-to-device (D2D) terminal, machine-to-machine (M2M) terminal, and so on.

[0043] In addition, the term "network side" or "network device side" refers to one side of the network, which can be a base station or one or more network devices as described above. The term "user side" or "terminal side" or "terminal device side" refers to the user or terminal side, which can be a UE or one or more terminal devices as described above. Unless otherwise specified herein, "device" can refer to either network equipment or terminal equipment.

[0044] In the following description, the terms "uplink control signal" and "uplink control information (UCI)" or "physical uplink control channel (PUCCH)" are interchangeable, and the terms "uplink data signal" and "uplink data information" or "physical uplink shared channel (PUSCH)" are interchangeable to avoid confusion.

[0045] The terms "downlink control signal" and "downlink control information (DCI)" or "physical downlink control channel (PDCCH)" are interchangeable, and the terms "downlink data signal" and "downlink data information" or "physical downlink shared channel (PDSCH)" are interchangeable.

[0046] In addition, the uplink signal may include an uplink data signal and / or an uplink control signal and / or PRACH and / or SRS, etc., which may also be referred to as uplink transmission (UL transmission) or uplink information or uplink channel. Sending / receiving uplink transmission on an uplink resource may be understood as sending / receiving the uplink transmission using the uplink resource. The downlink signal may include a downlink data signal and / or a downlink control signal and / or a synchronization signal (SS, such as PSS / SSS) and / or a broadcast channel (PBCH) and / or an SSB (SS / PBCH block, including PSS, SSS and PBCH and its DMRS) and / or CSI-RS, etc., which may also be referred to as downlink transmission (DL transmission) or downlink information or downlink channel. Sending / receiving downlink transmission on a downlink resource may be understood as sending / receiving the downlink transmission using the downlink resource. In the embodiment of the present application, the high-layer signaling may be, for example, radio resource control (RRC) signaling; RRC signaling may include, for example, an RRC message, such as a broadcast / public RRC message / signaling (e.g., a master information block (MIB), system information), a dedicated RRC message / signaling; or an RRC information element (RRC information element, RRC IE); or an information field included in an RRC message or an RRC information element (or an information field included in an information field). The high-layer signaling may also be, for example, a medium access control layer (MAC) signaling; or a MAC control element (MAC control element, MAC CE). However, the present application is not limited thereto.

[0047] In the embodiments of the present application, a plurality refers to at least two, or two or more.

[0048] In the embodiments of the present application, predefined means specified in the protocol or determined according to the rules specified in the protocol, and no additional configuration is required. Configuration / indication refers to direct or indirect configuration / indication by the network device through high-layer signaling and / or physical layer signaling. Configuration / indication can be achieved by introducing high-layer parameters in high-layer signaling, and high-layer parameters refer to information fields (fields) and / or information elements / information units / information elements (IEs) in high-layer signaling. Physical layer signaling refers to, for example, control information (DCI) carried by the physical downlink control channel or control information carried by the sequence, but is not limited thereto.

[0049] For ease of description, the following description will be made using a base station as an example of an access network device. In the following description, "if ...", "under ..." and "when ..." can be used interchangeably without causing confusion.

[0050] The following describes the scenarios of the embodiments of the present application through examples, but the present application is not limited thereto.

[0051] FIG1 is a schematic diagram of a communication system according to an embodiment of the present application, schematically illustrating a situation using a terminal device and a network device as an example. As shown in FIG1 , a communication system 100 may include a network device 101 and terminal devices 102 and 103. For simplicity, FIG1 illustrates only two terminal devices and one network device as an example, but the embodiments of the present application are not limited thereto.

[0052] In the embodiment of the present application, existing services or future services can be transmitted between the network device 101 and the terminal devices 102 and 103. For example, these services may include but are not limited to: enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and ultra-reliable and low-latency communication (URLLC), etc.

[0053] The terminal device 102 may send data to the network device 101, for example, using an authorized or unauthorized transmission mode. The network device 101 may receive data sent by one or more terminal devices 102 and provide feedback to the terminal device 102, such as ACK / NACK information. The terminal device 102 may confirm the end of the transmission process, or may continue with new data transmission, or may retransmit the data based on the feedback information.

[0054] It is worth noting that FIG1 shows that both terminal devices 102 and 103 are within the coverage range of network device 101, but the present application is not limited thereto. Both terminal devices 102 and 103 may not be within the coverage range of network device 101, or one terminal device 102 may be within the coverage range of network device 101 while the other terminal device 103 is outside the coverage range of network device 101.

[0055] The following describes the terms involved in this application, but the following explanations do not constitute a limitation on the embodiments of this application.

[0056] In the embodiments of the present application, the high-layer signaling may be, for example, radio resource control (RRC) signaling; for example, an RRC message, including, for example, a master information block (MIB), system information, or a dedicated RRC message; or an RRC information element (RRC IE). The high-layer signaling may also be, for example, MAC (Medium Access Control) signaling; or a MAC control element (MAC CE). However, the present application is not limited thereto.

[0057] In the following description, if there is no confusion, TP, transmission point, TRP, transmitting and receiving point, and transmitting and receiving node can be used interchangeably; multiple TRPs, multi-TRP (multiple transmission and reception point), mTRP, multi-TRP and MTRP can be used interchangeably; multi-point joint transmission, multi-transmission point collaborative transmission, and mTRP-based transmission can be used interchangeably.

[0058] In the following description, “track” and “trace” can be used interchangeably.

[0059] FIG2 is a schematic diagram of a transmission scheme, wherein FIG2(a) corresponds to a single-transmission reception point (S-TRP) scheme, FIG2(b) corresponds to a C-JT scheme, and FIG2(c) corresponds to an NC-JT scheme.

[0060] The specific difference between the C-JT and NC-JT schemes lies in the different mapping relationships between layers and multiple TRPs. In the C-JT scheme, all PDSCH / DMRS ports sent jointly from multiple TRPs and signals from multiple TRPs are coherently transmitted; in the NC-JT scheme, PDSCH / DMRS ports are sent separately from each TRP.

[0061] In previous standardization work, in Release 15 or 16 (Rel-15 / 16, R15 / 16), users all feedback or report CSI based on the single-transmission reception point (S-TRP) scheme, where CSI includes PMI (Precoding Matrix Indicator), RI (rank indication), LI (layer indication), CQI (Channel Quality Indicator), etc.

[0062] Release 17 (Rel-17, R17) supports enhanced CSI resource configuration and reporting for the NC-JT scheme. The UE can perform joint channel measurement based on reference signals sent by multiple transmission points (e.g., M transmission points, where M is greater than or equal to 2) using NC-JT, and report M PMIs, M RIs, M LIs, and N CQIs (N=1 for single codewords and N=2 for dual codewords). Currently, R17 only supports CSI reporting based on the 'type I single-panel' codebook configuration.

[0063] Release 18 (Rel-18, R18) supports enhanced CSI resource configuration and reporting for the C-JT solution. The UE can perform joint channel measurement based on reference signals sent by multiple transmission points using C-JT and report the complete CSI for a single joint channel. Currently, R18 supports CSI reporting based on both eType II and feType II codebook configurations.

[0064] In the C-JT solution, each data layer is mapped to multiple coordinated TRPs / panels using a weighted vector. This solution is equivalent to splicing multiple subarrays into a higher-dimensional virtual array. Therefore, the C-JT solution can achieve higher shaping / precoding / multiplexing gains and significantly improve cell-edge user throughput and average cell throughput.

[0065] (1) The current Rel-18 standardization process has explicitly supported C-JT transmission schemes and enhanced CSI reporting in ideal time-frequency synchronization and backhaul scenarios. The UE can perform joint channel measurement based on the reference signals sent by K transmission points based on C-JT transmission, and jointly report a single PMI, RI, LI, and N CQIs (single codeword N = 1, dual codeword N = 2).

[0066] (2) PMI / precoding reporting scheme: In the C-JT transmission scheme, the following precoding information is supported, which is calculated and jointly fed back based on K CSI-RS resources. The minimum frequency domain subband width of subband precoding is 2PRB:

[0067] Among them, w k (i) is the PMI information of the k-th transmission point, 0≤k≤K.

[0068] (3) NR supports the measurement of time delay and Doppler frequency deviation based on TRS (Tracking Reference Signal), where:

[0069] a) TRS is configured as a TRS burst. t N represents the TRS burst length, TRS burst period, TRSOFDM (Orthogonal Frequency Division Multiplexing) symbol interval, and the number of OFDM symbols occupied by TRS in a time slot. X and Y are both expressed in terms of the number of slots. The TRS time domain structure is designed as follows:

[0070] For frequency range 1 (FR1), i.e. less than 6 GHz, X = 2, S t =4, N=2;

[0071] For frequency range 2 (FR2), i.e. greater than 6 GHz, X = 1 or 2, S t =4, N=2.

[0072] b) Specifically, each TRS resource is a CSI-RS resource of a single port and a single OFDM symbol. Therefore, a CSI-RS resource set including N CSI-RS resources can be regarded as a TRS burst.

[0073] c) It supports traditional CSI-RS configurations such as P, SP, and AP. Among them, a CSI-RS resource setting can contain K non-zero power CSI-RS resource sets (NZP CSI-RS resource sets), and each CSI-RS resource set can be configured as trs-Info through RRC.

[0074] i. One resource is one OFDM symbol, so one burst requires 2 or 4 TRSs.

[0075] d) In R15-R17, TRS is only used for time-frequency tracking by the UE because TRS-based CSI reporting is not supported, that is, the reporting amount is 'none'.

[0076] e) In Release 18, to enhance Doppler frequency offset measurement in high-speed mobility scenarios, NR supports time-domain correlation reporting of multiple delay paths based on TRS. This primarily reflects the time-varying nature of different channels caused by Doppler. For example, TDCP (Time Domain Correlation Parameter) reporting is used. Table 1 defines the reporting parameters and the calculation formula for the reporting parameters.

[0077] Table 1 Definition of reported amount and calculation formula of reported amount

[0078] i. When the reporting amount is 'tdcp', the CSI reporting configuration (CSI reportconfig) can have the following configurations:

[0079] 1. Number of delays Y: The base station can configure Y∈{1,2,3,4} (Y>1 depends on the UE capability report) and the specific delay values ​​of Y delay paths through high-level signaling, that is, {D1,…,D Y If the base station is configured with Y, the UE is expected to report the amplitude value of the TDCP reporting quantity. Only when Y>1 can the UE report the amplitude and phase value of each delay path.

[0080] 2.Delay value D Y : The configurable delay value is D i ∈{4} symbols ∪{1,2,3,4,5,6,10} slots ,i=1,…,Y, where D i =10 time slots is limited to subcarrier spacing configuration μ≥1, D i = Values ​​other than 10 time slots apply to subcarrier spacing settings μ ≥ 0, where D i >D basic The value of can be configured according to UE capabilities, where D basic =1 time slot (The configurable delay values ​​are D i ∈{4} symbols ∪{1,2,3,4,5,6,10} slots ,i=1,…,Y,where the value D i=10slots is restricted to subcarrier spacing configuration μ≥1,the values ​​other than D i =10slots are applicable to subcarrier spacing configurations μ≥0,and where the values ​​D i >D basic can be configured subject to UE capability,with D basic =1 slot).

[0081] 3. For the i-th delay, UE selects D i For the Rel-18 TRS-based TDCP reporting, for a configured value of Y and a set of configured delay values ​​{D1, …, DY}, for the n-th delay Dn (n = 1, …, Y), the respective TDCP calculation is defined as wideband normalized correlation between two TRS symbols separated by Dn symbols.

[0082] 4. TDCP reported amplitude quantization: a) Codeword table for wideband normalized amplitude quantization, indicating N = 2 Q , where Q = 4, s = 1 / 2; b) Note: This does not exclude the reporting of "invalid" autocorrelation values.

[0083] 5. TDCP reports phase quantization (phase is reported only when Y>1): a) θ(D) supports uniform quantization of 16PSK.

[0084] For R17's HST-SFN (high-speed trains single-frequency network), two TRPs can send different TRS resources to measure the Doppler information of the two TRPs.

[0085] For the Release 18 C-JT solution, in order to measure channel state information such as PMI and CQI, the base station can configure 1, 2, 3, or 4 NZP CSI-RS resources for channel measurement within a CSI-RS resource set. The UE can measure the channel state information of each TRP transmission point using the NZP CSI-RS resources measured for each channel and feedback the joint CSI to the base station.

[0086] However, for the R18 enhanced TDCP reporting scheme, K TRS TRS resource sets are used to perform more time domain measurement and calculations, but each TRS resource set still uses the existing TRS resource configuration scheme that supports single-point transmission, that is, each TRS resource represents an OFDM symbol TRS, that is, a burst may consist of 2 or 4 TRS resources.

[0087] To address at least one of the above issues, embodiments of the present application provide a method, apparatus, and communication system for reporting or receiving channel state information. In the following description, if a parameter is represented by the same letter as in the preceding description, the meaning of the parameter shall be the same as that in the following description unless otherwise specified.

[0088] Embodiments of the first aspect

[0089] The present application embodiment provides a method for reporting channel state information, which is described from the perspective of a terminal device. FIG3 is a schematic diagram of the method for reporting channel state information according to an embodiment of the present application. As shown in FIG3 , the method includes:

[0090] 301. Receive a channel state information reference signal resource configuration, where the channel state information reference signal resource configuration corresponds to X channel state information reference signal resource sets for time-frequency information tracking, each of the channel state information reference signal resource sets including at least one tracking reference signal resource, where X is an integer greater than or equal to 1.

[0091] 302. Report channel state information based on multi-point joint transmission according to the tracking reference signal resource.

[0092] According to the above embodiment, the terminal device can report the channel state information based on multi-point joint transmission based on the tracking reference signal resources in the channel state information reference signal resource set used for time and frequency information tracking, which helps the network device to perform time and frequency synchronization of multiple transmission points based on the channel state information, thereby improving transmission efficiency, enhancing data transmission performance, and increasing single-user and network overall throughput.

[0093] It is worth noting that FIG3 above is merely a schematic illustration of an embodiment of the present application, and the present application is not limited thereto. For example, the execution order of the various operations may be appropriately adjusted, and other operations may be added or some operations may be reduced. Those skilled in the art may make appropriate modifications based on the above description, and are not limited to the description of FIG3 above.

[0094] In some embodiments, in multi-point joint transmission, a UE may be connected to multiple TRPs. For example, the UE may be connected to N TRPs, where N is an integer greater than or equal to 2. To facilitate synchronization of the multiple TRPs by the network device in the time domain and / or frequency domain, the UE may report CSI related to each TRP to the network device.

[0095] The CSI may include delay information and / or frequency offset information related to each TRP. The delay information and / or frequency offset information related to each TRP can be measured based on the TRS resources corresponding to each TRP. Therefore, when configuring TRS resources for the UE, it is necessary to configure TRS resources for each TRP separately so that the UE can determine and report the CSI information related to each TRP.

[0096] In some embodiments, a CSI-RS resource set may be configured as trs-Info (true / enable) via RRC. The CSI-RS resource set is a TRS resource set and includes one or more TRS resources. TRS, as a CSI-RS, may be used to track time and / or frequency deviation, thereby enabling a UE to continuously track and compensate for time and / or frequency deviation when receiving downlink data transmissions.

[0097] In some embodiments, TRS resources can be configured for each TRP in various ways. The following is an exemplary description of CSI-RS resource configuration.

[0098] Method 1:

[0099] In some embodiments, the CSI-RS resource configuration corresponds to N CSI-RS resource set groups, each CSI-RS resource set group includes at least one CSI-RS resource set, and N is an integer greater than or equal to 1.

[0100] In some embodiments, the N CSI-RS resource set groups may correspond one-to-one with the N TRPs in the MTRP-based transmission. That is, when the UE receives the above CSI-RS resource configuration, it defaults to a one-to-one correspondence between the N CSI-RS resource set groups corresponding to the CSI-RS resource configuration and the N TRPs.

[0101] In other words, the TRS transmitted on the TRS resources in each CSI-RS resource set in a CSI-RS resource set group comes from one TRP. That is, the TRS resources in each CSI-RS resource set group share the same quasi-co-location type A information or quasi-co-location type C information and / or share the same quasi-co-location type D information.

[0102] The quasi-co-location type A (QCL-Type A) information may include: {Doppler shift, Doppler spread, average delay, delay spread};

[0103] Quasi-co-location Type C (QCL-Type C) information may include: {Doppler shift, average delay}, only for frequency bands above 6 GHz;

[0104] Quasi-co-location type D (QCL-Type D) information may include: {Spatial Rx parameter}, which is only applicable to frequency bands above 6 GHz.

[0105] In some embodiments, the number of CSI-RS resource sets included in each CSI-RS resource set group may be equal, where X=N*Z, Z is the number of CSI-RS resource sets included in each CSI-RS resource set group, and Z is an integer greater than or equal to 1.

[0106] Figure 4 is a schematic diagram of resource configuration according to an embodiment of the present application. As shown in Figure 4, the CSI-RS resource configuration corresponds to N CSI-RS resource set groups. Each CSI-RS resource set group includes Z CSI-RS resource sets. For example, CSI-RS resource set group 1 includes CSI-RS resource sets 1-1, ..., CSI-RS resource set 1-Z, CSI-RS resource set group N includes CSI-RS resource set N-1, ..., CSI-RS resource set NZ, and so on.

[0107] In some embodiments, the number Z of CSI-RS resource sets included in each CSI-RS resource set group may be the number K of CSI-RS resource sets configured in the R18 enhanced TDCP reporting scheme. TRS. The application is not limited to this, and Z can also be other numbers.

[0108] In some embodiments, the number of CSI-RS resource sets included in different CSI-RS resource set groups may be unequal, where: Z i It is the number of CSI-RS resource sets included in the i-th CSI-RS resource set group.

[0109] FIG5 is another schematic diagram of resource configuration according to an embodiment of the present application. As shown in FIG5 , the CSI-RS resource configuration corresponds to N CSI-RS resource set groups. Among them, the i-th CSI-RS resource set group includes Z i For example, CSI-RS resource set group 1 includes CSI-RS resource sets 1-1, ..., CSI-RS resource set 1-Z1, and CSI-RS resource set group N includes CSI-RS resource sets N-1, ..., CSI-RS resource sets NZ N ,etc.

[0110] Among the N CSI-RS resource set groups, there is at least one CSI-RS resource set group in which the number of CSI-RS resource sets included is different from the number of CSI-RS resource sets included in the other CSI-RS resource set groups.

[0111] In some embodiments, in a CSI-RS resource set group, the number of TRS resources included in each CSI-RS resource set may be equal. For example, each CSI-RS resource set includes Y TRS resources. For example, Y is 1, 2, 3, or 4, or may be an integer greater than 4.

[0112] The present application is not limited to this. In one CSI-RS resource set group, the number of TRS resources included in different CSI-RS resource sets may also be unequal; or, in N CSI-RS resource set groups, the number of TRS resources included in each CSI-RS resource set may be equal; or, in different CSI-RS resource set groups, the number of TRS resources included in the CSI-RS resource sets may also be unequal.

[0113] In some embodiments, CSI based on the joint transmission mode can be reported according to each CSI-RS resource set group in step 302. Thus, the reported CSI can reflect the actual channel state corresponding to each TRP, which helps the network device to perform time-frequency synchronization of multiple TRPs based on the CSI.

[0114] In some embodiments, the reported CSI may include M channel delay and / or frequency offset information, where M = N. That is, one channel delay information, one frequency offset information, or one delay information and one frequency offset information is reported for each TRP. The delay and / or frequency offset information for a TRP is determined based on the TRS resources in each CSI-RS resource set in the CSI-RS resource set group corresponding to the TRP.

[0115] In some embodiments, M may also be a positive integer multiple of N. That is, multiple channel delay information, or multiple frequency offset information, or multiple delay information and multiple frequency offset information are reported for each TRP. The multiple delay and / or frequency offset information for a TRP is determined based on the TRS resources in each CSI-RS resource set in the CSI-RS resource set group corresponding to the TRP.

[0116] Method 2:

[0117] In some embodiments, a CSI-RS resource configuration corresponds to X CSI-RS resource sets. The X CSI-RS resource sets may correspond one-to-one to N TRPs in MTRP-based transmission, i.e., X=N, where N is an integer greater than or equal to 1. When a UE receives the above CSI-RS resource configuration, it assumes that the X CSI-RS resource sets corresponding to the CSI-RS resource configuration correspond one-to-one to the N TRPs.

[0118] In other words, the TRS transmitted on the TRS resources in a CSI-RS resource set comes from a TRP. That is, the TRS resources in each CSI-RS resource set share the same quasi-co-location type A information or quasi-co-location type C information and / or share the same quasi-co-location type D information.

[0119] FIG6 is another schematic diagram of resource configuration according to an embodiment of the present application. As shown in FIG6 , the CSI-RS resource configuration corresponds to N CSI-RS resource sets, namely, CSI-RS resource set 1, ..., CSI-RS resource set N.

[0120] In some embodiments, the number of TRS resources included in each CSI-RS resource set may be equal. For example, each CSI-RS resource set includes Y TRS resources. For example, Y is 1, 2, 3, or 4, or an integer greater than 4. The present application is not limited thereto, and the number of TRS resources included in different CSI-RS resource sets may also be unequal.

[0121] In some embodiments, channel state information based on the joint transmission mode can be reported based on each CSI-RS resource set in step 302. Thus, the reported CSI can reflect the actual channel state corresponding to each TRP, which helps the network device to perform time-frequency synchronization of multiple TRPs based on the channel state information.

[0122] In some embodiments, the reported CSI may include M channel delay and / or frequency offset information, where M = X. That is, for each TRP, one channel delay information, or one frequency offset information, or one delay information and one frequency offset information is reported. The delay and / or frequency offset information for a TRP is determined based on the TRS resources of the CSI-RS resource set corresponding to the TRP.

[0123] In some embodiments, M may also be a positive integer multiple of X. That is, multiple channel delay information, or multiple frequency offset information, or multiple delay information and multiple frequency offset information are reported for each TRP. The multiple delay and / or frequency offset information for a TRP is determined based on the TRS resources in the CSI-RS resource set corresponding to the TRP.

[0124] Method 3:

[0125] In some embodiments, the CSI-RS resource configuration corresponds to X CSI-RS resource sets, and each CSI-RS resource set includes N CSI-RS resource groups, where N is an integer greater than or equal to 1.

[0126] In some embodiments, the N CSI-RS resource groups in a CSI-RS resource set may correspond one-to-one with the N TRPs in an MTRP-based transmission. That is, when a UE receives the above CSI-RS resource configuration, it defaults to a one-to-one correspondence between the N CSI-RS resource groups in each CSI-RS resource set corresponding to the CSI-RS resource configuration and the N TRPs.

[0127] In other words, in a CSI-RS resource set, the TRS transmitted on the TRS resources in a CSI-RS resource group comes from a TRP. That is, the TRS resources in each CSI-RS resource group share the same quasi-co-location Type A or Type C information and / or the same quasi-co-location Type D information.

[0128] Furthermore, within each CSI-RS resource set, there is a CSI-RS resource group corresponding to the same TRP. That is, within X CSI-RS resource sets, there are X CSI-RS resource groups, and the TRSs transmitted on the TRS resources in these X CSI-RS resource groups come from one TRP. In other words, the TRS resources in these X CSI-RS resource groups share the same quasi-co-location Type A or Type C information and / or the same quasi-co-location Type D information.

[0129] For example, the j-th CSI-RS resource group in each CSI-RS resource set corresponds to the j-th TRP, where 1≤j≤N. In other words, the TRS resources in the j-th CSI-RS resource group in each CSI-RS resource set share the same quasi-co-location type A or type C information and / or the same quasi-co-location type D information.

[0130] Figure 7 is another schematic diagram of resource configuration according to an embodiment of the present application. As shown in Figure 7, the CSI-RS resource configuration corresponds to X CSI-RS resource sets, each of which includes N CSI-RS resource groups. For example, CSI-RS resource set 1 includes CSI-RS resource groups 1-1, ..., and CSI-RS resource groups 1-N, and CSI-RS resource set X includes CSI-RS resource groups X-1, ..., and CSI-RS resource groups XN.

[0131] In some embodiments, the number X of CSI-RS resource sets may be the number K of CSI-RS resource sets configured in the R18 enhanced TDCP reporting scheme. TRS The present application is not limited thereto, and X may also be other numbers.

[0132] In some embodiments, in a CSI-RS resource set, the number of TRS resources included in each CSI-RS resource group may be equal. For example, each CSI-RS resource group includes Y TRS resources. For example, Y is 1, 2, 3, or 4, or a number greater than 4.

[0133] The present application is not limited thereto. In one CSI-RS resource set, the number of TRS resources included in different CSI-RS resource groups may be unequal; or, the number of TRS resources included in each CSI-RS resource group in X CSI-RS resource sets may be equal; or, the number of TRS resources included in the CSI-RS resource groups of different CSI-RS resource sets may be unequal.

[0134] In some embodiments, CSI-RS resource group 1-1, CSI-RS resource group 2-1, ..., CSI-RS resource group X-1 may correspond to the first TRP, CSI-RS resource group 1-2, CSI-RS resource group 2-2, ..., CSI-RS resource group X-2 may correspond to the second TRP, and so on, CSI-RS resource group 1-N, CSI-RS resource group 2-N, ..., CSI-RS resource group XN may correspond to the Nth TRP. The present application is not limited thereto, and the CSI-RS resource groups in each CSI-RS resource set may also correspond to TRPs in other ways.

[0135] In some embodiments, the number of TRS resources in the corresponding CSI-RS resource groups in each CSI-RS resource set is the same. The corresponding CSI-RS resource group in each CSI-RS resource set corresponds to one TRP. For example, the number of TRS resources included in CSI-RS resource group 1-1, CSI-RS resource group 2-1, ..., and CSI-RS resource group X-1 corresponding to the first TRP is equal.

[0136] In some embodiments, in step 302, the CSI based on the joint transmission mode can be reported according to the corresponding CSI-RS resource group in each CSI-RS resource set. As a result, the reported CSI can reflect the actual channel state corresponding to each TRP, which helps the network device to perform time-frequency synchronization of multiple TRPs based on the channel state information. For example, the CSI of the jth TRP is reported according to the jth CSI-RS resource group in each CSI-RS resource set.

[0137] In some embodiments, the reported CSI may include M channel delay and / or frequency offset information, where M = N. That is, one channel delay information, one frequency offset information, or one delay information and one frequency offset information is reported for each TRP. The delay and / or frequency offset information for a TRP is determined based on the TRS resources in the CSI-RS resource groups in each CSI-RS resource set corresponding to the TRP.

[0138] In some embodiments, M may also be a positive integer multiple of N. That is, multiple channel delay information, or multiple frequency offset information, or multiple delay information and multiple frequency offset information are reported for each TRP. The multiple delay and / or frequency offset information for a TRP is determined based on the TRS resources in the CSI-RS resource groups in each CSI-RS resource set corresponding to the TRP.

[0139] Method 4:

[0140] In some embodiments, the CSI-RS resource configuration corresponds to X CSI-RS resource sets, and each TRS resource in each CSI-RS resource set includes N TRS resource ports, where N is an integer greater than or equal to 1.

[0141] In some embodiments, the N TRS resource ports of each TRS resource may correspond one-to-one with the N TRPs in the MTRP-based transmission. That is, when the UE receives the above CSI-RS resource configuration, the N TRS resource ports of each TRS resource correspond one-to-one with the N TRPs by default.

[0142] In other words, the TRS transmitted on the TRS resource ports corresponding to each TRS resource in the X CSI-RS resource sets comes from one TRP. That is, the TRS resource ports corresponding to each TRS resource share the same quasi-co-location type A or type C information and / or the same quasi-co-location type D information.

[0143] For example, the kth TRS resource port of each TRS resource corresponds to the kth TRP, where 1≤k≤N. In other words, the kth TRS resource port of each TRS resource shares the same quasi-co-location type A or type C information and / or the same quasi-co-location type D information. The present application is not limited to this, and the TRS resource port of each TRS resource may also correspond to a TRP in other ways.

[0144] In some embodiments, the number of TRS resources included in each CSI-RS resource set may be equal. For example, each CSI-RS resource set includes Y TRS resources. For example, Y is 1, 2, 3, or 4, or a number greater than 4.

[0145] Figure 8 is another schematic diagram of resource configuration according to an embodiment of the present application. As shown in Figure 8, the CSI-RS resource configuration corresponds to X CSI-RS resource sets, each of which includes Y TRS resources. For example, CSI-RS resource set 1 includes TRS resources 1-1, ..., TRS resources 1-Y, and CSI-RS resource set X includes TRS resources X-1, ..., TRS resources XY. Each TRS resource includes N TRS resource ports.

[0146] In some embodiments, the number of TRS resources included in different CSI-RS resource sets may also be unequal. FIG9 is another schematic diagram of resource configuration in an embodiment of the present application. As shown in FIG9, the CSI-RS resource configuration corresponds to X CSI-RS resource sets, and the jth CSI-RS resource set includes Y jFor example, CSI-RS resource set 1 includes TRS resources 1-1, ..., TRS resources 1-Y1, and CSI-RS resource set X includes TRS resources X-1, ..., TRS resources XY X Each TRS resource includes N TRS resource ports.

[0147] Among the X CSI-RS resource sets, there is at least one CSI-RS resource set in which the number of TRS resources included is different from the number of TRS resources included in the other CSI-RS resource sets.

[0148] In some embodiments, the number X of CSI-RS resource sets may be the number K of CSI-RS resource sets configured in the R18 enhanced TDCP reporting scheme. TRS The present application is not limited thereto, and X may also be other numbers.

[0149] In some embodiments, in step 302, channel state information based on the joint transmission mode can be reported based on the TRS resource port corresponding to each TRS resource. Thus, the reported CSI can reflect the actual channel state corresponding to each TRP, which helps the network device to synchronize the time and frequency of multiple TRPs based on the channel state information. For example, the CSI of the kth TRP is reported based on the kth TRS resource port of each TRS resource.

[0150] In some embodiments, the reported CSI may include M channel delay and / or frequency offset information, where M = N. That is, one channel delay information, one frequency offset information, or one delay information and one frequency offset information is reported for each TRP. The delay and / or frequency offset information for a TRP is determined based on the TRS resource ports of each TRS resource corresponding to the TRP.

[0151] In some embodiments, M may also be a positive integer multiple of N. That is, multiple channel delay information, or multiple frequency offset information, or multiple delay information and multiple frequency offset information are reported for each TRP. The multiple delay and / or frequency offset information for a TRP is determined based on the TRS resource ports of each TRS resource corresponding to the TRP.

[0152] In some embodiments, each CSI-RS resource set or each CSI-RS resource set group or resources within each CSI-RS resource group may be transmitted in one or more time slots. In other words, the UE may expect that each CSI-RS resource set or each CSI-RS resource set group or resources within each CSI-RS resource group may be transmitted in one or more time slots.

[0153] The following describes the method for reporting CSI in the present application with reference to specific examples.

[0154] Implementation method one:

[0155] Step 1: The terminal receives the CSI-RS resource configuration, specifically, through CSI-ResourceConfig in the high-level RRC signaling. The terminal receives the CSI-RS resource set group configuration in the CSI-RS resource configuration. For example, by setting 'CSI-RS ResourceSetGroup' = 4, the UE can receive four CSI-RS resource set groups, representing CSI-RS resource sets sent by four transmission points.

[0156] Step-2: For each CSI-RS resource set in each CSI-RS resource set group, it is configured as trs_info through high-level RRC signaling. The UE can identify the current CSI-RS resource as a TRS resource, which is used to measure the time-frequency tracking information of the channel.

[0157] Step-3-1: Each CSI-RS resource set group (also known as a TRS resource set group) contains a different number of CSI-RS resource sets (also known as TRS resource sets). Optionally, the i-th group contains Zi CSI-RS resource sets. For example, the first TRS resource set group contains 1 TRS resource set, the second TRS resource set group contains 3 TRS resource sets, the third TRS resource set group contains 2 TRS resource sets, and the fourth TRS resource set group contains 3 TRS resource sets.

[0158] Optionally, the value of each Zi can be configured through high-layer signaling, and the optional range is {1, 2, 3}.

[0159] Step-3-2: Each TRS resource set group contains an equal number of TRS resource sets and contains Z TRS resource sets. The first to fourth TRS resource set groups each contain 2 TRS resource sets.

[0160] Optionally, the value of Z can be configured through high-layer signaling, and the optional range is {1, 2, 3}.

[0161] Optionally, the value of Z can be determined by K in the high-level signaling. TRS Perform configuration.

[0162] Step-4-1: Each TRS resource set contains an equal number of TRS resources and includes Y TRS resources. For example, the first to fourth TRS resource sets each contain 4 TRS resources.

[0163] Optionally, the time domain pattern of each TRS resource is transmitted on only one OFDM symbol.

[0164] Optionally, the time domain pattern of each TRS resource may be transmitted over multiple OFDM symbols.

[0165] Step-4-2: Each TRS resource set contains a different number of TRS resources and contains one TRS resource. For example, the first and second TRS resource sets each contain four TRS resources. For example, the third and fourth TRS resource sets each contain two TRS resources.

[0166] Optionally, the time domain pattern of each TRS resource is transmitted on only one OFDM symbol.

[0167] Optionally, the time domain pattern of each TRS resource may be transmitted over multiple OFDM symbols.

[0168] Step-5: The terminal may assume that all TRS resources in each TRS resource set group can share the same QCL-TypeA / C information, and optionally, the same QCL-TypeD information.

[0169] Step-6: The terminal measures and reports the delay and frequency offset information of each transmission point based on the TRS resources of each TRS resource set group.

[0170] Implementation method 2:

[0171] Step 1: The terminal receives the CSI-RS resource configuration, which can be configured through CSI-ResourceConfig in high-level RRC signaling. The terminal receives the configuration of the CSI-RS resource set in the CSI-RS resource configuration. For example, the UE can receive four CSI-RS resource sets, representing the CSI-RS resource sets sent by four transmission points.

[0172] Step-2: For each CSI-RS resource set, it is configured as trs_info through high-level RRC signaling. The UE can identify the current CSI-RS resource as a TRS resource, which is used to measure the time-frequency tracking information of the channel.

[0173] Step-3-1: Each CSI-RS resource set (also called a TRS resource set) contains an equal number of TRS resources and includes Y TRS resources. For example, the first to fourth TRS resource sets each contain 4 TRS resources.

[0174] Optionally, the time domain pattern of each TRS resource is transmitted on only one OFDM symbol.

[0175] Optionally, the time domain pattern of each TRS resource may be transmitted over multiple OFDM symbols.

[0176] Step-3-2: Each TRS resource set contains a different number of TRS resources and contains one TRS resource. For example, the first and second TRS resource sets each contain four TRS resources. For example, the third and fourth TRS resource sets each contain two TRS resources.

[0177] Optionally, the time domain pattern of each TRS resource is transmitted on only one OFDM symbol.

[0178] Optionally, the time domain pattern of each TRS resource may be transmitted over multiple OFDM symbols.

[0179] Step-4: The terminal may assume that all TRS resources in each TRS resource set can share the same QCL-TypeA / C information, and optionally, the same QCL-TypeD information.

[0180] Step-5: The terminal measures and reports the delay and frequency offset information of each transmission point based on the TRS resources of each TRS resource set.

[0181] Implementation method three:

[0182] The terminal side receives CSI-RS resource configuration, where the CSI-RS resource configuration includes at least X CSI-RS resource sets, and each resource set is configured as 'trs_info'.

[0183] Optionally, X can be the number K of CSI-RS resource sets configured in the R18 enhanced TDCP reporting scheme. TRS .

[0184] Optionally, each CSI-RS resource set includes N CSI-RS resource groups, where N is an integer greater than or equal to 1.

[0185] Optionally, each CSI-RS resource group includes an equal number of TRS resources, namely, Y TRS resources.

[0186] Optionally, each CSI-RS resource group contains different numbers of TRS resources.

[0187] The i-th CSI-RS resource group contains one TRS resource, where i is a positive integer from 1 to N.

[0188] Step 1: The terminal receives the CSI-RS resource configuration, which can be configured through CSI-ResourceConfig in the high-level RRC signaling. The terminal receives the configuration of the CSI-RS resource set in the CSI-RS resource configuration.

[0189] Step-2: For each CSI-RS resource set, it is configured as trs_info through high-level RRC signaling. The UE can identify the current CSI-RS resource as a TRS resource, which is used to measure the time-frequency tracking information of the channel.

[0190] Step-3: Each CSI-RS resource set (also called TRS resource set) contains N TRS resource groups, where N is an integer greater than or equal to 1.

[0191] Step-4-1: Each TRS resource group contains an equal number of TRS resources and contains Y TRS resources. For example, the first to fourth TRS resource groups each contain 4 TRS resources.

[0192] Optionally, the time domain pattern of each TRS resource is transmitted on only one OFDM symbol.

[0193] Optionally, the time domain pattern of each TRS resource may be transmitted over multiple OFDM symbols.

[0194] Step-4-2: Each TRS resource group contains a different number of TRS resources and contains one TRS resource. For example, the first and second TRS resource groups each contain four TRS resources. For example, the third and fourth TRS resource groups each contain two TRS resources.

[0195] Optionally, the time domain pattern of each TRS resource is transmitted on only one OFDM symbol.

[0196] Optionally, the time domain pattern of each TRS resource may be transmitted over multiple OFDM symbols.

[0197] Step-5: The terminal may assume that all TRS resources in each TRS resource group can share the same QCL-TypeA / C information, and optionally, the same QCL-TypeD information.

[0198] Step-6: The terminal measures and reports the delay and frequency offset information of each transmission point based on the TRS resources of each TRS resource group.

[0199] Implementation method four:

[0200] Step 1: The terminal receives the CSI-RS resource configuration, which can be configured through CSI-ResourceConfig in the high-level RRC signaling. The terminal receives the configuration of the CSI-RS resource set in the CSI-RS resource configuration.

[0201] Step-2: For each CSI-RS resource set, it is configured as trs_info through high-level RRC signaling. The UE can identify the current CSI-RS resource as a TRS resource, which is used to measure the time-frequency tracking information of the channel.

[0202] Step-3: Each CSI-RS resource set (also called a TRS resource set) contains an equal number of TRS resources and includes Y TRS resources. For example, the first to fourth TRS resource sets each contain 4 TRS resources.

[0203] Optionally, the time domain pattern of each TRS resource is transmitted on only one OFDM symbol.

[0204] Optionally, the time domain pattern of each TRS resource may be transmitted over multiple OFDM symbols.

[0205] Step-4: Each TRS resource contains N TRS ports, where N is a positive integer greater than or equal to 1. For example, the first to fourth TRS resources each contain 4 TRS ports.

[0206] Optionally, the time domain pattern of each TRS resource is transmitted on only one OFDM symbol.

[0207] Optionally, the time domain pattern of each TRS resource may be transmitted over multiple OFDM symbols.

[0208] Step-5: The terminal may assume that the same ports of all TRS resources in each TRS resource set can share the same QCL-TypeA / C information, and optionally, may also share the same QCL-TypeD information.

[0209] Step-6: The terminal measures and reports the delay and frequency offset information of each transmission point based on the TRS resource port of each TRS resource set.

[0210] The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0211] According to the above embodiment, the terminal device can report the channel state information based on multi-point joint transmission based on the tracking reference signal resources in the channel state information reference signal resource set used for time and frequency information tracking, which helps the network device to perform time and frequency synchronization of multiple transmission points based on the channel state information, thereby improving transmission efficiency, enhancing data transmission performance, and increasing single-user and network overall throughput.

[0212] Embodiments of the second aspect

[0213] The embodiment of the present application provides a device for reporting channel state information. The device may be, for example, a terminal device, or one or more components or assemblies configured in the terminal device. The same contents as those in the embodiment of the first aspect are not repeated here.

[0214] FIG10 is a schematic diagram of an apparatus for reporting channel state information according to an embodiment of the present application. As shown in FIG10 , an apparatus 1000 for reporting channel state information includes: a receiving unit 1001 and a processing unit 1002 .

[0215] The receiving unit 1001 receives a channel state information reference signal resource configuration, where the channel state information reference signal resource configuration corresponds to X channel state information reference signal resource sets for time-frequency information tracking, each of the channel state information reference signal resource sets including at least one tracking reference signal resource, where X is an integer greater than or equal to 1.

[0216] The processing unit 1002 reports the channel state information based on the multi-point joint transmission according to the tracking reference signal resource.

[0217] According to the above embodiment, the terminal device can report the channel state information based on multi-point joint transmission based on the tracking reference signal resources in the channel state information reference signal resource set used for time and frequency information tracking, which helps the network device to perform time and frequency synchronization of multiple transmission points based on the channel state information, thereby improving transmission efficiency, enhancing data transmission performance, and increasing single-user and network overall throughput.

[0218] In some embodiments, the channel state information reference signal resource configuration corresponds to N channel state information reference signal resource set groups, each of the channel state information reference signal resource set groups includes at least one channel state information reference signal resource set, and N is an integer greater than or equal to 1.

[0219] In some embodiments, the tracking reference signal resources in each of the channel state information reference signal resource set groups share the same quasi-co-location type A or type C information and / or the same quasi-co-location type D information.

[0220] In some embodiments, the number of channel state information reference signal resource sets included in each of the channel state information reference signal resource set groups is equal, where X=N*Z, Z is the number of channel state information reference signal resource sets included in each of the channel state information reference signal resource set groups, and Z is an integer greater than or equal to 1.

[0221] In some embodiments, different CSIRS resource set groups include different numbers of CSIRS resource sets, wherein: Z i is the number of channel state information reference signal resource sets included in the i-th channel state information reference signal resource set group.

[0222] In some embodiments, the processing unit 1002 reports the channel state information based on the joint transmission mode according to each of the channel state information reference signal resource set groups.

[0223] In some embodiments, each of the channel state information reference signal resource sets includes N channel state information reference signal resource groups, where N is an integer greater than or equal to 1.

[0224] In some embodiments, the tracking reference signal resources in each of the channel state information reference signal resource groups share the same quasi-co-location type A or type C information and / or the same quasi-co-location type D information.

[0225] In some embodiments, the tracking reference signal resources in the jth channel state information reference signal resource group in each channel state information reference signal resource set share the same quasi-co-location type A or type C information and / or the same quasi-co-location type D information, where 1≤j≤N.

[0226] In some embodiments, the processing unit 1002 reports the channel state information based on the joint transmission mode according to the corresponding channel state information reference signal resource group in each channel state information reference signal resource set.

[0227] In some embodiments, the number of tracking reference signal resources in the corresponding channel state information reference signal resource groups in each of the channel state information reference signal resource sets is the same.

[0228] In some embodiments, each of the channel state information reference signal resource groups includes an equal number of tracking reference signal resources; or

[0229] The numbers of tracking reference signal resources included in different channel state information reference signal resource groups are not equal.

[0230] In some embodiments, each of the tracking reference signal resources includes N tracking reference signal resource ports, where N is an integer greater than or equal to 1.

[0231] In some embodiments, the kth tracking reference signal resource port of each tracking reference signal resource shares the same quasi co-location type A or type C information and / or the same quasi co-location type D information, where 1≤k≤N.

[0232] In some embodiments, the processing unit 1002 reports the channel state information based on the joint transmission mode according to the tracking reference signal resource port corresponding to each tracking reference signal resource.

[0233] In some embodiments, the channel state information includes M channel delay and / or frequency offset information, where M=N, or M is a positive integer multiple of N.

[0234] In some embodiments, the tracking reference signal resources in each of the channel state information reference signal resource sets share the same quasi-co-location type A or type C information and / or the same quasi-co-location type D information.

[0235] In some embodiments, the processing unit 1002 reports the channel state information based on the joint transmission mode according to each of the channel state information reference signal resource sets.

[0236] In some embodiments, the channel state information includes M channel delay and / or frequency offset information, where M=X, or M is a positive integer multiple of X.

[0237] The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0238] It is worth noting that the above description only describes the components or modules related to the present application, but the present application is not limited thereto. The apparatus 1000 for reporting channel state information may also include other components or modules. For details of these components or modules, reference may be made to related technologies.

[0239] In addition, for the sake of simplicity, FIG10 only illustrates the connection relationship or signal direction between various components or modules. However, it should be clear to those skilled in the art that various related technologies such as bus connection can be used. The above-mentioned components or modules can be implemented by hardware facilities such as processors, memories, transmitters, and receivers; the implementation of this application is not limited to this.

[0240] According to the above embodiment, the terminal device can report the channel state information based on multi-point joint transmission based on the tracking reference signal resources in the channel state information reference signal resource set used for time and frequency information tracking, which helps the network device to perform time and frequency synchronization of multiple transmission points based on the channel state information, thereby improving transmission efficiency, enhancing data transmission performance, and increasing single-user and network overall throughput.

[0241] Embodiments of the third aspect

[0242] The embodiment of the present application provides a method for receiving channel state information, which is described from the perspective of a network device. The contents that are the same as those in the embodiment of the first aspect are not repeated here.

[0243] FIG11 is a schematic diagram of a method for receiving channel state information according to an embodiment of the present application. As shown in FIG11 , the method includes:

[0244] 1101. Send a channel state information reference signal resource configuration, where the channel state information reference signal resource configuration corresponds to X channel state information reference signal resource sets for time-frequency information tracking, each of the channel state information reference signal resource sets including at least one tracking reference signal resource, where X is an integer greater than or equal to 1.

[0245] 1102. Receive channel state information based on multi-point joint transmission.

[0246] According to the above embodiment, the network device is able to receive channel state information based on multi-point joint transmission calculated based on the tracking reference signal resources in the channel state information reference signal resource set used for time-frequency information tracking, which helps the network device to perform time-frequency synchronization of multiple transmission points based on the channel state information, thereby improving transmission efficiency, enhancing data transmission performance, and increasing single-user and overall network throughput.

[0247] It is worth noting that FIG11 above is merely a schematic illustration of an embodiment of the present application, and the present application is not limited thereto. For example, the execution order of the various operations may be appropriately adjusted, and other operations may be added or some operations may be reduced. Those skilled in the art may make appropriate modifications based on the above description, and are not limited to the description of FIG11 above.

[0248] In some embodiments, the channel state information reference signal resource configuration corresponds to N channel state information reference signal resource set groups, each of the channel state information reference signal resource set groups includes at least one channel state information reference signal resource set, and N is an integer greater than or equal to 1.

[0249] In some embodiments, the tracking reference signal resources in each of the channel state information reference signal resource set groups share the same quasi-co-location type A or type C information and / or the same quasi-co-location type D information.

[0250] In some embodiments, the number of channel state information reference signal resource sets included in each of the channel state information reference signal resource set groups is equal, where X=N*Z, Z is the number of channel state information reference signal resource sets included in each of the channel state information reference signal resource set groups, and Z is an integer greater than or equal to 1.

[0251] In some embodiments, different CSIRS resource set groups include different numbers of CSIRS resource sets, wherein: Z i is the number of channel state information reference signal resource sets included in the i-th channel state information reference signal resource set group.

[0252] In some embodiments, the channel state information based on the joint transmission mode is determined according to each of the channel state information reference signal resource set groups.

[0253] In some embodiments, each of the channel state information reference signal resource sets includes N channel state information reference signal resource groups, where N is an integer greater than or equal to 1.

[0254] In some embodiments, the tracking reference signal resources in each of the channel state information reference signal resource groups share the same quasi-co-location type A or type C information and / or the same quasi-co-location type D information.

[0255] In some embodiments, the tracking reference signal resources in the jth channel state information reference signal resource group in each channel state information reference signal resource set share the same quasi-co-location type A or type C information and / or the same quasi-co-location type D information, where 1≤j≤N.

[0256] In some embodiments, the channel state information based on the joint transmission mode is determined according to the corresponding channel state information reference signal resource group in each channel state information reference signal resource set.

[0257] In some embodiments, the number of tracking reference signal resources in the corresponding channel state information reference signal resource groups in each of the channel state information reference signal resource sets is the same.

[0258] In some embodiments, the number of tracking reference signal resources included in each of the channel state information reference signal resource groups is equal; or the number of tracking reference signal resources included in different channel state information reference signal resource groups is unequal.

[0259] In some embodiments, each of the tracking reference signal resources includes N tracking reference signal resource ports, where N is an integer greater than or equal to 1.

[0260] In some embodiments, the kth tracking reference signal resource port of each tracking reference signal resource shares the same quasi co-location type A or type C information and / or the same quasi co-location type D information, where 1≤k≤N.

[0261] In some embodiments, the channel state information based on the joint transmission mode is determined according to the tracking reference signal resource port corresponding to each tracking reference signal resource.

[0262] In some embodiments, the channel state information includes M channel delay and / or frequency offset information, where M=N, or M is a positive integer multiple of N.

[0263] In some embodiments, the tracking reference signal resources in each of the channel state information reference signal resource sets share the same quasi-co-location type A or type C information and / or the same quasi-co-location type D information.

[0264] In some embodiments, the channel state information based on the joint transmission mode is determined according to each of the channel state information reference signal resource sets.

[0265] In some embodiments, the channel state information includes M channel delay and / or frequency offset information, where M=X, or M is a positive integer multiple of X.

[0266] The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0267] According to the above embodiment, the network device is able to receive channel state information based on multi-point joint transmission calculated based on the tracking reference signal resources in the channel state information reference signal resource set used for time-frequency information tracking, which helps the network device to perform time-frequency synchronization of multiple transmission points based on the channel state information, thereby improving transmission efficiency, enhancing data transmission performance, and increasing single-user and overall network throughput.

[0268] Embodiments of the fourth aspect

[0269] The embodiment of the present application provides a device for receiving channel state information. The device may be, for example, a network device, or one or more components or assemblies configured in the network device. The contents that are the same as those in the embodiment of the third aspect are not repeated here.

[0270] FIG12 is a schematic diagram of an apparatus for receiving channel state information according to an embodiment of the present application. As shown in FIG12 , an apparatus 1200 for receiving channel state information includes: a sending unit 1201 and a receiving unit 1202 .

[0271] The sending unit 1201 sends a channel state information reference signal resource configuration, where the channel state information reference signal resource configuration corresponds to X channel state information reference signal resource sets for time-frequency information tracking, each of the channel state information reference signal resource sets including at least one tracking reference signal resource, where X is an integer greater than or equal to 1; and the receiving unit 1202 receives channel state information based on multi-point joint transmission.

[0272] According to the above embodiment, the network device is able to receive channel state information based on multi-point joint transmission calculated based on the tracking reference signal resources in the channel state information reference signal resource set used for time-frequency information tracking, which helps the network device to perform time-frequency synchronization of multiple transmission points based on the channel state information, thereby improving transmission efficiency, enhancing data transmission performance, and increasing single-user and overall network throughput.

[0273] In some embodiments, the channel state information reference signal resource configuration corresponds to N channel state information reference signal resource set groups, each of the channel state information reference signal resource set groups includes at least one channel state information reference signal resource set, and N is an integer greater than or equal to 1.

[0274] In some embodiments, the tracking reference signal resources in each of the channel state information reference signal resource set groups share the same quasi-co-location type A or type C information and / or the same quasi-co-location type D information.

[0275] In some embodiments, the number of channel state information reference signal resource sets included in each of the channel state information reference signal resource set groups is equal, where X=N*Z, Z is the number of channel state information reference signal resource sets included in each of the channel state information reference signal resource set groups, and Z is an integer greater than or equal to 1.

[0276] In some embodiments, different CSIRS resource set groups include different numbers of CSIRS resource sets, wherein: Z i is the number of channel state information reference signal resource sets included in the i-th channel state information reference signal resource set group.

[0277] In some embodiments, the channel state information based on the joint transmission mode is determined according to each of the channel state information reference signal resource set groups.

[0278] In some embodiments, each of the channel state information reference signal resource sets includes N channel state information reference signal resource groups, where N is an integer greater than or equal to 1.

[0279] In some embodiments, the tracking reference signal resources in each of the channel state information reference signal resource groups share the same quasi-co-location type A or type C information and / or the same quasi-co-location type D information.

[0280] In some embodiments, the tracking reference signal resources in the jth channel state information reference signal resource group in each channel state information reference signal resource set share the same quasi-co-location type A or type C information and / or the same quasi-co-location type D information, where 1≤j≤N.

[0281] In some embodiments, the channel state information based on the joint transmission mode is determined according to the corresponding channel state information reference signal resource group in each channel state information reference signal resource set.

[0282] In some embodiments, the number of tracking reference signal resources in the corresponding channel state information reference signal resource groups in each of the channel state information reference signal resource sets is the same.

[0283] In some embodiments, the number of tracking reference signal resources included in each of the channel state information reference signal resource groups is equal; or the number of tracking reference signal resources included in different channel state information reference signal resource groups is unequal.

[0284] In some embodiments, each of the tracking reference signal resources includes N tracking reference signal resource ports, where N is an integer greater than or equal to 1.

[0285] In some embodiments, the kth tracking reference signal resource port of each tracking reference signal resource shares the same quasi co-location type A or type C information and / or the same quasi co-location type D information, where 1≤k≤N.

[0286] In some embodiments, the channel state information based on the joint transmission mode is determined according to the tracking reference signal resource port corresponding to each tracking reference signal resource.

[0287] In some embodiments, the channel state information includes M channel delay and / or frequency offset information, where M=N, or M is a positive integer multiple of N.

[0288] In some embodiments, the tracking reference signal resources in each of the channel state information reference signal resource sets share the same quasi-co-location type A or type C information and / or the same quasi-co-location type D information.

[0289] In some embodiments, the channel state information based on the joint transmission mode is determined according to each of the channel state information reference signal resource sets.

[0290] In some embodiments, the channel state information includes M channel delay and / or frequency offset information, where M=X, or M is a positive integer multiple of X.

[0291] The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0292] It is worth noting that the above description only describes the components or modules related to the present application, but the present application is not limited thereto. The apparatus 1200 for receiving channel state information may also include other components or modules. For details of these components or modules, reference may be made to related technologies.

[0293] In addition, for the sake of simplicity, FIG12 only illustrates the connection relationship or signal direction between various components or modules. However, it should be clear to those skilled in the art that various related technologies such as bus connection can be used. The above-mentioned components or modules can be implemented by hardware facilities such as processors, memories, transmitters, and receivers; the implementation of this application is not limited to this.

[0294] According to the above embodiment, the network device is able to receive channel state information based on multi-point joint transmission calculated based on the tracking reference signal resources in the channel state information reference signal resource set used for time-frequency information tracking, which helps the network device to perform time-frequency synchronization of multiple transmission points based on the channel state information, thereby improving transmission efficiency, enhancing data transmission performance, and increasing single-user and overall network throughput.

[0295] Embodiments of the fifth aspect

[0296] An embodiment of the present application also provides a communication system, and reference may be made to FIG1 . The contents that are the same as those in the embodiments of the first to fourth aspects will not be repeated.

[0297] In some implementations, a communication system 100 may include at least: a network device and a terminal device. The network device transmits a channel state information reference signal resource configuration corresponding to X channel state information reference signal resource sets for time-frequency information tracking, each channel state information reference signal resource set including at least one tracking reference signal resource, where X is an integer greater than or equal to 1, and receives channel state information based on multi-point joint transmission. The terminal device receives the channel state information reference signal resource configuration and reports the channel state information based on the tracking reference signal resources.

[0298] An embodiment of the present application further provides a network device, which may be, for example, a base station, but the present application is not limited thereto and may also be other network devices.

[0299] Figure 13 is a schematic diagram illustrating the structure of a network device according to an embodiment of the present application. As shown in Figure 13 , network device 1300 may include a processor 1310 (e.g., a central processing unit (CPU)) and a memory 1320. Memory 1320 is coupled to processor 1310. Memory 1320 may store various data and may also store an information processing program 1330, which is executed under the control of processor 1310.

[0300] For example, the processor 1310 may be configured to execute a program to implement the operation of the network device in the method according to the embodiment of the third aspect. For example, the processor 1310 may be configured to perform the following control: sending a channel state information reference signal resource configuration, where the channel state information reference signal resource configuration corresponds to X channel state information reference signal resource sets for time-frequency information tracking, each of the channel state information reference signal resource sets including at least one tracking reference signal resource, where X is an integer greater than or equal to 1; and receiving channel state information based on multi-point joint transmission.

[0301] In addition, as shown in FIG13 , network device 1300 may further include: a transceiver 1340 and an antenna 1350, etc.; wherein, the functions of the above components are similar to those in the related art and are not described in detail here. It is worth noting that network device 1300 does not necessarily include all the components shown in FIG13 ; in addition, network device 1300 may also include components not shown in FIG13 , and reference may be made to the related art for details.

[0302] The embodiment of the present application also provides a terminal device, but the present application is not limited thereto and may also be other devices.

[0303] Figure 14 is a schematic diagram of a terminal device according to an embodiment of the present application. As shown in Figure 14 , terminal device 1400 may include a processor 1410 and a memory 1420. Memory 1420 stores data and programs and is coupled to processor 1410. It should be noted that this diagram is exemplary; other types of structures may be used to supplement or replace this structure to implement telecommunication or other functions.

[0304] For example, the processor 1410 may be configured to execute a program to implement the method according to the embodiment of the first aspect. For example, the processor 1410 may be configured to perform the following control: receiving a channel state information reference signal resource configuration, where the channel state information reference signal resource configuration corresponds to X channel state information reference signal resource sets for time-frequency information tracking, each of the channel state information reference signal resource sets including at least one tracking reference signal resource, where X is an integer greater than or equal to 1; and reporting channel state information based on multi-point joint transmission according to the tracking reference signal resource.

[0305] As shown in Figure 14 , the terminal device 1400 may further include: a communication module 1430, an input unit 1440, a display 1450, and a power supply 1460. The functions of these components are similar to those in the related art and are not described here in detail. It is worth noting that the terminal device 1400 does not necessarily include all of the components shown in Figure 14 , and these components are not essential. Furthermore, the terminal device 1400 may also include components not shown in Figure 14 , for which reference may be made to the related art.

[0306] An embodiment of the present application further provides a computer program, wherein when the program is executed in a terminal device, the program causes the terminal device to execute the method described in the embodiment of the first aspect.

[0307] An embodiment of the present application further provides a storage medium storing a computer program, wherein the computer program enables a terminal device to execute the method described in the embodiment of the first aspect.

[0308] An embodiment of the present application further provides a computer program, wherein when the program is executed in a network device, the program causes the network device to execute the method described in the embodiment of the third aspect.

[0309] An embodiment of the present application further provides a storage medium storing a computer program, wherein the computer program enables a network device to execute the method described in the embodiment of the third aspect.

[0310] The above devices and methods of the present application can be implemented by hardware or by a combination of hardware and software. The present application relates to such a computer-readable program that, when executed by a logic component, enables the logic component to implement the devices or components described above, or enables the logic component to implement the various methods or steps described above. The present application also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, etc.

[0311] The method / device described in conjunction with the embodiments of the present application can be directly embodied as hardware, a software module executed by a processor, or a combination of the two. For example, one or more of the functional block diagrams shown in the figure and / or one or more combinations of functional block diagrams can correspond to various software modules of the computer program flow or to various hardware modules. These software modules can respectively correspond to the various steps shown in the figure. These hardware modules can be implemented by solidifying these software modules, for example, using a field programmable gate array (FPGA).

[0312] The software module may be located in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. A storage medium may be coupled to a processor so that the processor can read information from the storage medium and write information to the storage medium; or the storage medium may be an integral part of the processor. The processor and the storage medium may be located in an ASIC. The software module may be stored in the memory of the mobile terminal or in a memory card that can be inserted into the mobile terminal. For example, if the device (such as a mobile terminal) uses a large-capacity MEGA-SIM card or a large-capacity flash memory device, the software module may be stored in the MEGA-SIM card or the large-capacity flash memory device.

[0313] One or more of the functional blocks and / or one or more combinations of functional blocks described in the accompanying drawings may be implemented as a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or any appropriate combination thereof for performing the functions described in this application. One or more of the functional blocks and / or one or more combinations of functional blocks described in the accompanying drawings may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in communication with a DSP, or any other such configuration.

[0314] The present application has been described above in conjunction with specific embodiments. However, those skilled in the art should understand that these descriptions are merely illustrative and are not intended to limit the scope of protection of the present application. Those skilled in the art may make various modifications and variations to the present application based on the spirit and principles of the present application, and such modifications and variations are also within the scope of the present application.

[0315] Regarding the implementation methods including the above embodiments, the following additional notes are also disclosed:

[0316] Note 1. A method for reporting channel state information, applied to a terminal device, comprising:

[0317] receiving a channel state information reference signal resource configuration, where the channel state information reference signal resource configuration corresponds to X channel state information reference signal resource sets for time-frequency information tracking, each of the channel state information reference signal resource sets including at least one tracking reference signal resource, where X is an integer greater than or equal to 1; and

[0318] Channel state information based on multi-point joint transmission is reported according to the tracking reference signal resource.

[0319] Note 2. The method according to Note 1, wherein:

[0320] The channel state information reference signal resource configuration corresponds to N channel state information reference signal resource set groups, each of the channel state information reference signal resource set groups includes at least one channel state information reference signal resource set, and N is an integer greater than or equal to 1.

[0321] Note 3. The method according to claim 2, wherein:

[0322] The tracking reference signal resources in each of the channel state information reference signal resource set groups share the same quasi-co-location type A or type C information and / or the same quasi-co-location type D information.

[0323] Supplement 4. The method according to Supplement 2, wherein:

[0324] The channel state information based on the joint transmission mode is reported according to each of the channel state information reference signal resource set groups.

[0325] Supplement 5. The method according to Supplement 1, wherein:

[0326] Each of the channel state information reference signal resource sets includes N channel state information reference signal resource groups, where N is an integer greater than or equal to 1.

[0327] Note 6. The method according to Note 5, wherein:

[0328] The tracking reference signal resources in each of the channel state information reference signal resource groups share the same quasi-co-location type A or type C information and / or the same quasi-co-location type D information.

[0329] Note 7. The method according to Note 5, wherein:

[0330] The channel state information based on the joint transmission mode is reported according to the corresponding channel state information reference signal resource group in each channel state information reference signal resource set.

[0331] Note 8. The method according to Note 1, wherein:

[0332] Each of the tracking reference signal resources includes N tracking reference signal resource ports, where N is an integer greater than or equal to 1.

[0333] Note 9. The method according to Note 8, wherein:

[0334] The k-th tracking reference signal resource port of each tracking reference signal resource shares the same quasi co-location type A or type C information and / or the same quasi co-location type D information, where 1≤k≤N.

[0335] Note 10. The method according to Note 8, wherein:

[0336] Channel state information based on the joint transmission mode is reported according to the tracking reference signal resource port corresponding to each tracking reference signal resource.

Claims

1. A device for reporting channel state information, configured in a terminal device, comprising: a receiving unit configured to receive a channel state information reference signal resource configuration, where the channel state information reference signal resource configuration corresponds to X channel state information reference signal resource sets for time-frequency information tracking, each of the channel state information reference signal resource sets including at least one tracking reference signal resource, where X is an integer greater than or equal to 1; as well as A processing unit reports channel state information based on multi-point joint transmission according to the tracking reference signal resource.

2. The device according to claim 1, wherein The channel state information reference signal resource configuration corresponds to N channel state information reference signal resource set groups, each of the channel state information reference signal resource set groups includes at least one channel state information reference signal resource set, and N is an integer greater than or equal to 1.

3. The device according to claim 2, wherein The tracking reference signal resources in each of the channel state information reference signal resource set groups share the same quasi-co-location type A or type C information and / or the same quasi-co-location type D information.

4. The device according to claim 2, wherein The number of channel state information reference signal resource sets included in each channel state information reference signal resource set group is equal, wherein X=N*Z, Z is the number of channel state information reference signal resource sets included in each channel state information reference signal resource set group, and Z is an integer greater than or equal to 1; or The numbers of channel state information reference signal resource sets included in different channel state information reference signal resource set groups are not equal, wherein: Z i is the number of channel state information reference signal resource sets included in the i-th channel state information reference signal resource set group.

5. The device according to claim 2, wherein The processing unit reports the channel state information based on the joint transmission mode according to each of the channel state information reference signal resource set groups.

6. The device according to claim 1, wherein Each of the channel state information reference signal resource sets includes N channel state information reference signal resource groups, where N is an integer greater than or equal to 1.

7. The device according to claim 6, wherein The tracking reference signal resources in each of the channel state information reference signal resource groups share the same quasi-co-location type A or type C information and / or the same quasi-co-location type D information.

8. The device according to claim 6, wherein The tracking reference signal resources in the jth channel state information reference signal resource group in each channel state information reference signal resource set share the same quasi co-location type A or type C information and / or the same quasi co-location type D information, where 1≤j≤N.

9. The device according to claim 6, wherein The processing unit reports the channel state information based on the joint transmission mode according to the corresponding channel state information reference signal resource group in each channel state information reference signal resource set.

10. The device according to claim 6, wherein The number of tracking reference signal resources in the corresponding channel state information reference signal resource groups in each channel state information reference signal resource set is the same.

11. The device according to claim 6, wherein The number of tracking reference signal resources included in each of the channel state information reference signal resource groups is equal; or The numbers of tracking reference signal resources included in different channel state information reference signal resource groups are not equal.

12. The device according to claim 1, wherein Each of the tracking reference signal resources includes N tracking reference signal resource ports, where N is an integer greater than or equal to 1.

13. The device according to claim 12, wherein The k-th tracking reference signal resource port of each tracking reference signal resource shares the same quasi co-location type A or type C information and / or the same quasi co-location type D information, where 1≤k≤N.

14. The device according to claim 12, wherein The processing unit reports channel state information based on a joint transmission mode according to the tracking reference signal resource port corresponding to each tracking reference signal resource.

15. The device according to any one of claims 2, 6, and 12, wherein: The channel state information includes M channel delay and / or frequency offset information, where M=N, or M is A positive integer multiple of N.

16. The device according to claim 1, wherein The tracking reference signal resources in each of the channel state information reference signal resource sets share the same quasi-co-location type A or type C information and / or the same quasi-co-location type D information.

17. The device according to claim 16, wherein The processing unit reports the channel state information based on the joint transmission mode according to each of the channel state information reference signal resource sets.

18. The device according to claim 17, wherein The channel state information includes M channel delay and / or frequency offset information, where M=X, or M is a positive integer multiple of X.

19. A device for receiving channel state information, configured in a network device, the device comprising: a sending unit configured to send a channel state information reference signal resource configuration, where the channel state information reference signal resource configuration corresponds to X channel state information reference signal resource sets for time-frequency information tracking, each of the channel state information reference signal resource sets including at least one tracking reference signal resource, where X is an integer greater than or equal to 1; as well as A receiving unit receives channel state information based on multi-point joint transmission.

20. A communication system comprising a network device and a terminal device, wherein: The network device sends a channel state information reference signal resource configuration, where the channel state information reference signal resource configuration corresponds to X channel state information reference signal resource sets for time-frequency information tracking, each of the channel state information reference signal resource sets including at least one tracking reference signal resource, where X is an integer greater than or equal to 1, and receives channel state information based on multi-point joint transmission; The terminal device receives the channel state information reference signal resource configuration, and reports the channel state information based on the tracking reference signal resource.

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