Reference signal configuration method and device, electronic equipment, storage medium and product

Abstract

The invention provides a reference signal configuration method and device, electronic equipment, a storage medium and a product, in the method, a base station determines configuration signaling of downlink channel state information reference signal resources, and the configuration signaling is used for indicating that one channel state information reference signal resource comprises quasi co-location information of each cooperation point; the base station sends the configuration signaling to the terminal; wherein the number of antenna ports occupied by the target resource is related to the number of code division multiplexing groups; the antenna ports occupied by the target resources are divided according to a preset logic sequence; wherein the target resource is a channel state information reference signal resource corresponding to each cooperation point. According to the invention, the measurement and feedback of the plurality of cooperation points are realized through the channel state information reference signal resource carrying the quasi-co-location information of each cooperation point, the real-time performance is improved, and the feedback overhead is reduced.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of communication, and particularly relates to a reference signal configuration method and device, electronic equipment, storage medium and product. BACKGROUND

[0002] In a multi-transmission-reception point (Multi-TRP) scenario, after a terminal initially accesses a primary serving cell, the terminal performs channel measurement and feedback on multiple surrounding coordinated points in a time-division manner using CSI-RS. In the prior art, one CSI-RS resource corresponds to one TRP. When the number of coordinated points is large or increases, the time delay of this measurement method also increases significantly, resulting in poor real-time performance of the measurement data, which cannot meet the performance of coherent transmission, and the feedback overhead is large. SUMMARY

[0003] The present disclosure provides a reference signal configuration method and device, electronic equipment, storage medium and product, which realize measurement and feedback on multiple coordinated points through one channel state information reference signal resource carrying quasi co-location information of each coordinated point, improve real-time performance and reduce feedback overhead.

[0004] In a first aspect, the present disclosure provides a reference signal configuration method, comprising:

[0005] determining configuration signaling of a downlink channel state information reference signal resource, wherein the configuration signaling is used to indicate that one channel state information reference signal resource includes quasi co-location information of each coordinated point;

[0006] sending the configuration signaling to a terminal;

[0007] wherein a number of antenna ports occupied by a target resource is related to a number of code division multiplexing groups; the antenna ports occupied by the target resource are divided according to a preset logical order; and the target resource is one channel state information reference signal resource corresponding to each coordinated point.

[0008] In a second aspect, the present disclosure provides a reference signal configuration method, comprising:

[0009] receiving configuration signaling of a downlink channel state information reference signal resource from a base station, wherein the configuration signaling is used to indicate that one channel state information reference signal resource includes quasi co-location information of each coordinated point;

[0010] based on the configuration signaling, measuring channel state information of each coordinated point;

[0011] The number of antenna ports occupied by the target resource is related to the number of code division multiplexing groups; the antenna ports occupied by the target resource are divided according to a preset logical order; the target resource is one channel state information reference signal resource corresponding to each cooperation point.

[0012] In a third aspect, the present disclosure provides a reference signal configuration apparatus, comprising:

[0013] A determination unit is configured to determine configuration signaling of a downlink channel state information reference signal resource, the configuration signaling being used to indicate that one channel state information reference signal resource includes quasi co-location information of each cooperation point;

[0014] A transceiver is configured to send the configuration signaling to a terminal;

[0015] The number of antenna ports occupied by the target resource is related to the number of code division multiplexing groups; the antenna ports occupied by the target resource are divided according to a preset logical order; the target resource is one channel state information reference signal resource corresponding to each cooperation point.

[0016] In a fourth aspect, the present disclosure provides a reference signal configuration apparatus, comprising:

[0017] A transceiver is configured to receive configuration signaling of a downlink channel state information reference signal resource from a base station, the configuration signaling being used to indicate that one channel state information reference signal resource includes quasi co-location information of each cooperation point;

[0018] A processing unit is configured to measure channel state information of each cooperation point based on the configuration signaling;

[0019] The number of antenna ports occupied by the target resource is related to the number of code division multiplexing groups; the antenna ports occupied by the target resource are divided according to a preset logical order; the target resource is one channel state information reference signal resource corresponding to each cooperation point.

[0020] In a fifth aspect, the present disclosure provides an electronic device, comprising a memory configured to store computer readable instructions, and a processor configured to run the computer readable instructions, so that the electronic device performs the method according to any one of the embodiments of the first aspect or the second aspect.

[0021] In a sixth aspect, the present disclosure provides a non-transitory computer readable storage medium configured to store computer readable instructions, when the computer readable instructions are executed by a processor, the processor performs the method according to any one of the embodiments of the first aspect or the second aspect.

[0022] In a seventh aspect, the present disclosure provides a computer program product comprising a computer program which, when executed by a processor, implements the method according to any embodiment of the first aspect or the second aspect.

[0023] The present disclosure provides a reference signal configuration method and device, electronic equipment, storage medium and product. When a base station configures a resource of a downlink channel state information reference signal for a terminal, one channel state information reference signal resource is configured for multiple cooperation points, and the quasi co-location information of each cooperation point in the one channel state information reference signal resource is indicated in the configuration signaling. Specifically, one channel state information reference signal resource corresponding to each cooperation point is regarded as a target resource, the number of antenna ports occupied by the target resource is related to the number of code division multiplexing groups, and the antenna ports occupied by the target resource are divided according to a preset logical order. In this way, the all-round correspondence of the cooperation point, the downlink channel state information reference signal, the channel state information reference signal resource, the QCL relationship and the antenna port can be determined in combination with the aggregation correspondence between the number of antenna port multiplexing and the code division multiplexing group. Therefore, in the multi-cooperation point scenario, the channel state measurement and feedback of multiple cooperation points can be realized through one channel state information reference signal resource, which can not only reduce the measurement delay and improve the real-time performance, but also reasonably multiplex the quasi co-location information to reduce the feedback overhead. In summary, the technical solution provided by the present disclosure can improve the real-time performance and reduce the feedback overhead, improve the performance of coherent transmission, and better guarantee the user consistency experience.

[0024] It is to be understood that both the foregoing general description and the following detailed description are exemplary, and are intended to provide further explanation of the subject technology. BRIEF DESCRIPTION OF DRAWINGS

[0025] The foregoing and other objects, features, and advantages of the present disclosure will become more apparent from the following detailed description, which proceeds with reference to the accompanying drawings. The drawings are provided to illustrate embodiments of the present disclosure and, together with the detailed description, serve to explain the present disclosure. The drawings are not intended to limit the present disclosure, and the same reference numbers in different drawings represent the same or similar elements or steps.

[0026] Figure 1 A multi-TRP interaction schematic diagram in the prior art;

[0027] Figure 2 A flowchart of a reference signal configuration method provided by the present disclosure;

[0028] Figure 3 A multi-TRP scenario schematic diagram provided by the present disclosure;

[0029] Figure 4Another multi-TRP scenario provided for the present disclosure;

[0030] Figure 5 A configuration signaling structure provided for the present disclosure;

[0031] Figure 6 A configuration relationship logic provided for the present disclosure;

[0032] Figure 7 A configuration signaling structure provided for the present disclosure;

[0033] Figure 8 A configuration relationship logic provided for the present disclosure;

[0034] Figure 9 A multi-TRP quasi co-location information configuration in a CJT scenario provided for the present disclosure;

[0035] Figure 10 Another multi-TRP quasi co-location information configuration in a CJT scenario provided for the present disclosure;

[0036] Figure 11 Another reference signal configuration method provided for the present disclosure;

[0037] Figure 12 A reference signal configuration device structure provided for the present disclosure;

[0038] Figure 13 Another reference signal configuration device structure provided for the present disclosure;

[0039] Figure 14 A hardware block diagram of an electronic device provided for the present disclosure;

[0040] Figure 15 A schematic diagram of a computer readable storage medium provided for the present disclosure. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the present disclosure more obvious, the example embodiments according to the present disclosure will be described in detail below with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all embodiments of the present disclosure, and it should be understood that the present disclosure is not limited by the example embodiments described here.

[0042] The disclosure can be applied to various communication systems. For example, the communication system can include, but is not limited to, a Global System of Mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) system, a General Packet Radio Service (GPRS), a Long Term Evolution (LTE) system, an Advanced Long Term Evolution (LTE-A) system, a New Radio (NR) system, an evolved system of the NR system, an LTE-based access to unlicensed spectrum (LTE-U) system, an NR-based access to unlicensed spectrum (NR-U) system, a Non-Terrestrial Networks (NTN) system, a Universal Mobile Telecommunication System (UMTS), a Wireless Local Area Networks (WLAN), a Wireless Fidelity (WiFi), a 5th-Generation (5G) system, a distributed massive MIMO system in a 6G network (or referred to as a cell-free massive MIMO or other communication systems, etc.

[0043] In the present disclosure, the network side device can be specifically a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next generation NodeB (gNB) in a 5th generation (5G) mobile communication system, a next generation NodeB in a 6th generation (6G) mobile communication system, a base station in a future mobile communication system, or an access node in a wireless fidelity (WiFi) system, etc. It can also be a module or unit that completes part of the functions of the base station, for example, it can be a central unit (CU) or a distributed unit (DU). The wireless access network device can be a macro base station, a micro base station or an indoor station, and can also be a relay node, etc. The present disclosure does not have special restrictions on the specific technologies and specific device forms adopted by the wireless access network device. For ease of description, the following describes the base station as an example of the wireless access network device.

[0044] The terminal, which can also be referred to as a terminal device, user equipment (UE), mobile station, mobile terminal, etc., can communicate with the network side device. Specifically, the terminal can be widely applied to various scenarios, such as device-to-device (D2D) communication, vehicle to everything (V2X) communication, machine-type communication (MTC), internet of things (IOT), virtual reality, augmented reality, industrial control, autonomous driving, remote medical treatment, smart power grid, smart furniture, smart office, smart wear, smart transportation, smart city, etc. Based on this, the terminal can be, but is not limited to, a mobile phone, a tablet computer, a computer with wireless transceiver function, a wearable device, a vehicle, a drone, a helicopter, an airplane, a ship, a robot, a mechanical arm, a smart home device, etc. The present application embodiment does not have special restrictions on the specific technologies and specific device forms adopted by the terminal.

[0045] Both the base station and the terminal can be collectively referred to as a communication device, wherein the base station can also be referred to as a communication device with a base station function, and the terminal can also be referred to as a communication device with a terminal function. The base station and the terminal can be fixed in position or mobile. The base station and the terminal can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on the water surface; can also be deployed on aircraft, balloons and artificial satellites in the air. The embodiments of the present application do not have special restrictions on the application scenarios of the base station and the terminal.

[0046] For ease of understanding, first briefly describe the technical terms involved in the present disclosure.

[0047] Multi-TRP (Multi-Transmission and Receiving Point, multiple transmission and receiving points), which can be referred to as mTRP or multi-TRP for short.

[0048] SSB (Synchronization Signal / PBCH Block, synchronization signal block), a TRP can transmit an SSB to perform channel measurement and feedback.

[0049] Serving cell refers to a service cell.

[0050] CSI-RS (Channel State Information-Reference Signal, channel state information reference signal), which can be used to measure channel state information (CSI, Channel State Information), wherein the CSI at least includes: channel quality indicator (CQI, Channel Quality Indicator), rank indicator (RI, Rank Indicator) and precoding matrix indicator (PMI, Precoder Matrix Indicator).

[0051] CSI-RS resource set, that is, a CSI-RS resource set. Wherein, the CSI-RS resource, that is, a CSI-RS resource, is a signal resource for measuring a channel state information reference signal.

[0052] QCL, Quasi Colocation, quasi co-location. For two antenna ports with QCL relationship, the wireless channel properties of one antenna port can be inferred from the wireless channel properties of the other antenna port. In other words, for two antenna ports with QCL relationship, the channel estimation result obtained from one antenna port can be used for the other antenna port. The wireless channel properties include, but are not limited to, at least one of the following: Doppler spread / shift, average delay, delay spread, average gain, and spatial receiver parameter (i.e. analog beam information). Specifically, the QCL relationship includes at least four types (QCL Type), and different QCL Type corresponds to different wireless channel properties. Among them, QCL Type A relationship means that two ports have the same Doppler shift, Doppler spread, average delay, and delay spread; QCL Type B relationship means that two ports have the same Doppler shift and Doppler spread; QCL Type C relationship means that two ports have the same average delay and Doppler shift; QCL Type C relationship means that two ports have the same Spatial Rx parameter (analog beam information).

[0053] CSI-RS resource Config, used to configure CSI-RS resource.

[0054] NZP-CSI-RS-Resource, a kind of information element for configuring NZP (None Zero Power) CSI-RS, wherein NZP CSI-RS is used to obtain channel state.

[0055] qcl-InfoPeriodicCSI-RS, a kind of high layer signaling in NZP-CSI-RS-Resource, containing QCL resource signal and QCL type TCI-State. If TCI-State is configured with a reference signal with QCL-Type D, this RS can be SSB or another CSI-RS located on the same or different CC / BWP.

[0056] TCI-State Id is a kind of transmission configuration indication identifier, which is used to configure QCL relationship. Specifically, the parameter of TCI-StateId is used to configure quasi co-location relationship between 1-2 downlink reference signals and DMRS (DeModulation Reference Signal) of PDSCH (Physical Downlink Shared Channel). TCI means Transmission Configuration Indicator, which is a field in DCI used to indicate PDSCH antenna port quasi co-location.

[0057] QCL-Info, which means quasi co-location information, is a field in TCI-State Id, which is used to indicate quasi co-location information of different coordination points.

[0058] CDM (code division multiplexing) is a kind of communication mode for realizing multiplexing by using orthogonal structure of code type of each signal.

[0059] CSI-RS port is an antenna port of CSI-RS.

[0060] CJT (coherent joint transmission) is a kind of joint transmission mode, in which data streams are transmitted by multiple TRPs, and precoding matrices of different TRPs are coordinated to ensure that data streams are coherently superimposed at the receiving end. The precoding matrices of multiple TRPs are processed into a higher-dimensional antenna array to obtain higher beamforming gain.

[0061] RSRP (Reference Signal Receiving Power) is a kind of parameter used to measure channel quality.

[0062] Secondly, the application scenario of the present disclosure is briefly described.

[0063] The distributed super-large MIMO system (or called cell-free massive MIMO) in the 6G network is an important direction of super-large antenna evolution, which combines the advantages of large-scale MIMO and distributed antenna technology. On the basis of large-scale MIMO technology, the originally centralized antenna array is dispersed in each location of the cell, and the user is taken as the center. Based on the intelligent interaction and intelligent cooperation among multiple nodes, the multi-frequency transmission characteristics are combined. While eliminating the inter-cell interference and improving the spectrum resource utilization rate, the physical implementation challenge of the traditional centralized MIMO radio frequency and antenna number is reduced by several times, the system scalability and reliability are enhanced, and thus the borderless user experience is possible in the 6G network. The cooperative multipoint transmission (CoMP) in the 4G period and the multi-transmission-reception cooperation point (Multi-TRP) technology in the 5G are early explorations of the practical application of the distributed super-large MIMO technology.

[0064] The present disclosure is particularly applicable to the Multi-TRP scenario, and further, to the specific application scenario of CSI-RS resource configuration for a terminal by a base station in the Multi-TRP scenario.

[0065] In the Multi-TRP scenario, a serving cell can perform resource scheduling for a single terminal from multiple TRP units, thereby being able to improve the network performance in terms of coverage, reliability, data rate, and the like.

[0066] Please refer to Figure 1 , Figure 1 for a multi-TRP interaction diagram in the prior art. As shown in Figure 1 , in a serving cell, two TRPs (TRP1 and TRP2) provide services for a UE, wherein TRP1 is a serving TRP (serving TRP) in the serving cell. As shown in Figure 1As shown, 2 TRPs transmit SSB#1 and SSB#2 in time division. For a terminal, first, the terminal establishes a connection with TRP1 through an initial access process, and obtains the system message of TRP1 (including serving cell ID#1 and other information) from SSB#1. Subsequently, the terminal needs to perform channel measurement and feedback on multiple cooperating points around the terminal. For example, in a non-connected state, the terminal performs measurement on SSB#2 transmitted by TRP2, feeds back RSRP information to the network side, and obtains the system message of TRP2 (including serving cell ID#2 and other information). Or, for example, in a connected state, the terminal performs channel quality measurement on 2 TRPs through CSI-RS and feeds back PMI (precoder matrix) and other information to realize coherent transmission of multiple TRPs. Finally, the network side determines whether the terminal works in a Multi-TRP mode according to the multiple cell measurement results of the terminal.

[0067] In the multi-TRP interaction process as shown in Figure 1 In the multi-TRP interaction process as shown in When performing channel measurement and feedback, time division is used for measurement and feedback. Based on this, the network side device needs to configure multiple sets of CSI-RS resource sets, and one CSI-RS resource in each set of CSI-RS resource sets corresponds to one TRP. In this way, when the terminal feeds back the channel measurement result to the network side, the terminal also feeds back the channel quality information measured by the CSI-RS corresponding to different TRPs respectively. When the number of cooperating points increases or is large, this time-division-based measurement and feedback mechanism will cause an increase in measurement delay, so that the real-time performance of the channel quality information fed back by the terminal is poor, which will have a great impact on the performance of coherent transmission. For example, when the number of cooperating points increases, if the channel quality information fed back by the terminal is SINR (Signal to Interference plus Noise Ratio), the terminal needs to obtain the channel information of all TRPs before measurement, the delay is large, and the real-time performance of data cannot be guaranteed. Moreover, this one-to-one correspondence measurement and feedback mode uses different CSI-RS resources to measure different TRP channels, so it is necessary to feed back the channel quality information of each CSI-RS resource respectively, and the feedback overhead is large.

[0068] Based on the foregoing problems of the prior art, the present disclosure provides a new design concept: utilizing one channel state information reference signal resource (i.e., a signal resource of a channel state information reference signal, referred to as a signal resource) to implement measurement and feedback on multiple TRPs, wherein the network device indicates the QCL relationship of multiple TRPs in the configuration signaling for configuring the channel state information reference signal resource of the terminal, and determines the correspondence relationship between the TRP, the channel state information reference signal and the antenna port based on the relationship between the code division multiplexing group number and the antenna port multiplexing relationship, the preset logical order division relationship, and the relationship between the code division multiplexing group number and the TRP number.

[0069] Hereinafter, specific descriptions are given.

[0070] The present disclosure provides a reference signal configuration method, which is applied to a base station (i.e., a network side device).

[0071] Please refer to Figure 2 , Figure 2 A flowchart of a reference signal configuration method provided by the present disclosure is shown in FIG. 1. As shown in FIG. 1, the method comprises the following steps: Figure 2

[0072] S202, determining configuration signaling of a downlink channel state information reference signal resource, wherein the configuration signaling is used to indicate that one channel state information reference signal resource includes quasi co-location information of each coordination point.

[0073] It should be understood that in the scenario corresponding to the configuration signaling, one channel state information reference signal resource (in the resource configuration scenario of the downlink channel state information reference signal, also referred to as the downlink channel state information reference signal resource, or simply referred to as the signal resource) corresponds to multiple coordination points, and can be used to implement measurement and feedback on multiple TRPs.

[0074] S204, sending the configuration signaling to the terminal;

[0075] Wherein, the number of antenna ports occupied by the target resource is related to the number of code division multiplexing groups; the antenna ports occupied by the target resource are divided according to a preset logical order; wherein, the target resource is one channel state information reference signal resource corresponding to each coordination point.

[0076] ​The present disclosure is particularly applicable to the configuration scenario of downlink channel state information reference signals. Therefore, in an exemplary embodiment, when the downlink channel state information reference signal (hereinafter referred to as channel state information reference signal, which refers to the downlink channel state information reference signal) is CSI-RS, then the channel state information reference signal resource (or can be referred to as: downlink channel state information reference signal resource, downlink reference signal resource, etc., without particular limitation on the naming) is CSI-RS resource. In the present disclosure, one channel state information reference signal resource corresponds to multiple TRPs, but the present disclosure does not have particular limitation on the specific number of TRPs, which can generally be two or more. For ease of illustration, the following will be illustrated by taking the case of two TRPs as an example. In addition, in the present disclosure, the multiple TRPs corresponding to one channel state information reference signal resource can belong to the same serving cell or belong to different cells. At this time, reference can be made to Figure 3 and Figure 4 , Figure 3 A multi-TRP scenario provided by the present disclosure is shown in Figure 4 Another multi-TRP scenario provided by the present disclosure is shown in Figure 3 As shown, the terminal (i.e. UE) can first access TRP1 in the primary serving cell, and then work in the Multi-TRP mode through channel measurement and feedback on the surrounding coordination points (TRP2) and under the indication of the base station, so that TRP1 and TRP2 cooperatively serve the terminal. At this time, TRP1 and TRP2 are in the same serving cell. Figure 4 Another case is shown in

[0077] In Figure 1 the prior art, the scheme of one channel state information reference signal resource corresponding to one TRP, the QCL relationship of each TRP (CSI-RS resource) is configured separately. In comparison, the present disclosure adopts the implementation mode of one channel state information reference signal resource corresponding to multiple TRPs, and therefore, the present disclosure also improves the quasi-co-location information carried by the configuration signaling: one channel state information reference signal resource can carry the quasi-co-location information of multiple TRPs.

[0078] As mentioned earlier, QCL relationship refers to the QCL relationship that can exist between two reference signals at two ports. When a certain type of QCL relationship exists, the channel information of one reference signal can be directly obtained from the channel information of the other reference signal. The existence of a QCL relationship between reference signals means that one reference signal can obtain large-scale information corresponding to that QCL type from the other reference signal. For example, if reference signal A and reference signal B have a QCL Type B relationship, then the Doppler shift and Doppler spread of reference signal A can be directly obtained from reference signal B. This means that when measuring channel information using reference signals, repeated measurements are unnecessary, which can reduce measurement delay and improve real-time performance to some extent; it also means that when using reference signals for channel information feedback, repeated feedback is unnecessary, which can reduce feedback overhead. In other words, reasonable utilization of QCL relationships can further reduce feedback overhead and improve real-time performance. This disclosure aims to reasonably utilize the QCL relationships of each TRP; therefore, when allocating CSI-RS resources, the QCL relationships of each TRP are specified.

[0079] Specifically, the quasi-co-address information of any TRP involved in this disclosure may include, but is not limited to: a reference signal identifier with a QCL relationship and a QCL relationship type. It should be understood that in actual implementation scenarios, the quasi-co-address information may also include other information, such as... Figure 5 , Figure 6 In the scenario shown, the quasi-co-address information may also include: cell, Bwp-Id, etc., which will not be expanded.

[0080] For any terminal and TRP, the reference signal identifier with a QCL relationship is used to indicate another reference signal between the terminal and the TRP that has a QCL relationship with the CSI-RS. That is, the two reference signals with a QCL relationship are: the CSI-RS between the terminal and the TRP and the other reference signal. This disclosure does not impose any particular limitation on the type of "reference signal with a QCL relationship", and it can be any reference signal in the actual application scenario. For example, it can include, but is not limited to, at least one of the following: SSB, SRS (Sounding Reference Signal), DRS (Demodulation Reference Signal), CRS (Cell Reference Signal), etc., without exhaustive list.

[0081] The QCL relationship type is used to indicate the QCL type of the CSI-RS and the reference signal with which it has a QCL relationship. As mentioned above, the QCL types involved in this disclosure may include, but are not limited to, at least one of: QCL Type A, QCL Type B, QCL Type C, and QCL Type D. Further details will not be provided.

[0082] This disclosure does not limit the identification method. Taking a reference signal as an example, it can be represented by "signal name + ID". For example, SSB-Index#0 can represent the SSB signal with ID 0. In addition, TRP, serving cell, etc. can also be represented in this way.

[0083] Furthermore, this disclosure does not impose any particular restrictions on the form or naming of the configuration signaling. In one exemplary embodiment, the configuration signaling for the (downlink) channel state information reference signal resource can specifically be RRC signaling.

[0084] In the specific application scenario of multi-TRP measurement and feedback, the technical solution provided in this disclosure can be applied before the terminal performs channel measurement and feedback to multiple surrounding cooperative points. For example, this disclosure also provides the communication process for the terminal to enter multi-TRP mode.

[0085] Step 1: The terminal connects to the primary serving cell.

[0086] First, TRP1 and TRP2 each generate two SSBs (e.g., SSB1 and SSB2) on different time-frequency resources.

[0087] Afterwards, the UE accesses the serving cell 1 via SSB1.

[0088] Afterwards, Serving cell 1 notifies the UE to measure the channel quality of other surrounding cells.

[0089] Step 2: Based on the configuration signaling sent by the network device side (i.e., the base station), the terminal uses a channel state information reference signal resource to perform channel measurements on multiple surrounding TRPs.

[0090] This configuration signaling is... Figure 2 In the configuration signaling of the illustrated embodiment, when the network-side device configures channel state information reference signal resources for the terminal, one channel state information reference signal resource includes quasi-co-address information of multiple TRPs. Thus, the terminal performs channel measurement of surrounding TRPs based on the channel state information reference signal resource.

[0091] Step 3: The terminal sends the channel measurement results back to the base station.

[0092] Step four: the base station determines whether the terminal works in the Multi-TRP mode based on the measurement results of the multiple TRPs reported by the terminal. The base station sends an instruction to the terminal, and the terminal works in the Multi-TRP mode based on the instruction.

[0093] In this process, the reference signal configuration method provided by the present disclosure is applied before step two, which can be triggered based on step one or pre-configured.

[0094] In summary, when the base station configures the downlink channel state information reference signal resource for the terminal, one channel state information reference signal resource is configured for multiple TRPs, and in the configuration signaling of the downlink channel state information reference signal resource, the quasi co-location information of each TRP included in one channel state information reference signal resource is indicated; specifically, one channel state information reference signal resource corresponding to each cooperation point is regarded as a target resource, the number of antenna ports occupied by the target resource is related to the number of code division multiplexing groups, and the antenna ports occupied by the target resource are divided according to a preset logical order. In this way, combined with the aggregation correspondence between the number of antenna port multiplexing and the code division multiplexing group, the all-round correspondence of the cooperation point, the downlink channel state information reference signal, the channel state information reference signal resource, the QCL relationship and the antenna port can be realized. Therefore, in the multi-TRP scenario, the channel state measurement and feedback of multiple TRPs can be realized through one channel state information reference signal resource, which can not only reduce the measurement delay and improve the real-time performance, but also reasonably multiplex the quasi co-location information to reduce the feedback overhead. In summary, the technical solution provided by the present disclosure can improve the real-time performance and reduce the feedback overhead, improve the performance of coherent transmission, and better guarantee the user consistency experience.

[0095] In the present disclosure, the quasi co-location information of multiple TRPs carried in the configuration signaling can have different configuration modes. The following takes the channel state information reference signal as an example for specific description.

[0096] In one possible embodiment, the configuration signaling includes multiple transmission configuration indication identifiers, wherein any one transmission configuration indication identifier is used to indicate the quasi co-location information of one cooperation point.

[0097] In the reference signal configuration scenario of the CSI-RS (channel state information reference signal), the transmission configuration indication can specifically be a TCI-State Id in a TCI-State Id sequence. In this embodiment, the TCI-State Id sequence includes multiple TCI-State Ids, and any one TCI-State Id field is used to indicate the quasi co-location information of one TRP. Specifically, when configuring the NZP-CSI-RS-Resource, the high-level signaling qcl-InfoPeriodicCSI-RS can be set to a sequence of a group of TCI-State Ids, and the sequence includes multiple TCI-State Ids, and each TCI-State Id is used to indicate the quasi co-location information of one TRP.

[0098] For example, refer to Figure 5 , Figure 5 A configuration signaling structure diagram provided by the present disclosure is as follows: Figure 5 As shown in the red font part, when the base station configures the CSI-RS resource Config configuration signaling of different cooperation points for the terminal, the NZP-CSI-RS-Resource needs to be configured. In the specific configuration process, the high-level signaling qcl-InfoPeriodicCSI-RS in the NZP-CSI-RS-Resource can be used to indicate the quasi co-location information of the TRP, that is, set to the TCI-State Id. In the present disclosure, the qcl-InfoPeriodicCSI-RS is not set to a specific value of the TCI-State Id, but is set to a sequence (sequence) of a group of TCI-State Ids, and the TCI-State Id sequence is the specific content that can be used to indicate multiple TCI-State Ids of the TRP. In this way, the quasi co-location information of multiple cooperation points can be configured through one CSI-RS resource (that is, the channel state information reference signal resource). Correspondingly, multiple TRPs can perform channel quality measurement on one CSI-RS, and the quasi co-location information of each TRP is associated with the resource configuration information of the CSI-RS.

[0099] For example, Figure 5The specific content of the TCI-State Id sequence is also shown: TCI-State Id 12, TCI-State Id 13, which correspond to two TRPs respectively, specifically, to two CSI-RS signals of the two TRPs respectively. For example, TCI-State Id 12 can be used to represent CSI-RS#12 corresponding to TRP1, i.e., the CSI-RS signal identified as 12. And, Figure 5 Further, the specific content of TCI-State Id 12 and TCI-State Id 13 is also exemplified by the QCL-Info field.

[0100] As Figure 5 shown in the first QCL-Info field in the above, for the TRP corresponding to TCI-State Id 12 (denoted as TRP1), the cell corresponding to the TRP1 is ServCellIndex 1, i.e., service cell 1, and the reference signal having QCL relationship with the CSI-RS#12 corresponding to the TRP1 is SSB-Index#0 (or denoted as SSB#0), i.e., the SSB signal identified as 0, and the type of the QCL relationship possessed by the two reference signals (i.e., CSI-RS#12 and SSB-Index#0) is Type A and Type D. This means that when measuring the channel quality between the two TRPs and the UE through the CSI-RS#12, based on the configuration information as Figure 5 shown in the above, when the UE receives the CSI-RS#12, the Type A related large-scale channel information and the receiving beam direction of the TRP1 related CSI-RS port are the same as SSB-Index#0.

[0101] Similarly, as Figure 5 shown in the other QCL-Info field in the above, for the TRP corresponding to TCI-State Id 13 (denoted as TRP2), the cell corresponding to the TRP2 is ServCellIndex 1, i.e., service cell 1, and the reference signal having QCL relationship with the CSI-RS#13 corresponding to the TRP2 is SSB-Index#1 (or denoted as SSB#1), i.e., the SSB signal identified as 1, and the type of the QCL relationship possessed by the two reference signals (i.e., CSI-RS#13 and SSB-Index#1) is Type B. This means that when measuring the channel quality between the two TRPs and the UE through the CSI-RS#13, based on the configuration information as Figure 5The configuration information shown can know that when the UE receives the CSI-RS#13, for the TRP2-related CSI-RS port, the Type B-related large-scale channel information and the receiving beam direction are the same as the SSB-Index#1.

[0102] For ease of understanding, reference can be made to Figure 6 , Figure 6 A logical diagram of a configuration relationship provided by the present disclosure. As Figure 6 shown, the base station can configure a CSI-RS resource set for the terminal, and the CSI-RS resource set can include multiple CSI-RS resources. For the NZP-CSI-RS-Resource 12 in the CSI-RS resources, in the present disclosure, the CSI-RS resource corresponds to two TRPs, and the quasi co-location information of each TRP is also indicated in the configuration signaling of the CSI-RS resource. Specifically, the CSI-RS resource corresponds to two TCI-State Ids, and each TCI-State Id is used to indicate the QCL relationship of one TRP. For specific indication content, reference can be made to the foregoing, and no longer be described in detail.

[0103] The present disclosure also provides another possible configuration mode.

[0104] In another possible embodiment, the configuration signaling includes a transmission configuration indication identifier, and the transmission configuration indication identifier includes multiple quasi co-location information fields, and any one quasi co-location information field is used to indicate the quasi co-location information of one cooperation point.

[0105] In the reference signal configuration scenario of the CSI-RS, the transmission configuration indication identifier can still be a TCI-State Id in the TCI-State Id sequence. In this embodiment, the TCI-State Id sequence includes one TCI-State Id, and the TCI-State Id includes multiple QCL-Info fields (i.e., quasi co-location information fields), and any one QCL-Info field is used to indicate the quasi co-location information of one TRP.

[0106] Specifically, when configuring the NZP-CSI-RS-Resource, the high-layer signaling qcl-InfoPeriodicCSI-RS can be set to a TCI-State Id value, and when the TCI-State Id is used to indicate the quasi co-location information of multiple TRPs, the TCI-State Id includes multiple QCL-Info fields, and each QCL-Info field is used to indicate the quasi co-location information of one TRP.

[0107] For example, reference can be made to Figure 7, Figure 7 This is a schematic diagram of the configuration signaling structure provided in this disclosure, such as... Figure 7 As shown in red, when the base station configures the CSI-RS resource Config for different cooperative points for the terminal, it sets the higher-layer signaling qcl-InfoPeriodicCSI-RS in NZP-CSI-RS-Resource to a specific TCI-State Id value, namely TCI-State Id13. This TCI-State Id13 includes multiple QCL-Info fields: QCL-Info 1 and QCL-Info 2, where QCL-Info 1 and QCL-Info 2 respectively indicate the quasi-co-location information of the two TRPs.

[0108] Specifically, such as Figure 7 As shown in the QCL-Info 1 field, for CSI-RS#13 corresponding to TCI-State Id 13, TRP1 is the cooperative point in ServCellIndex 1, and the reference signal with QCL relationship with CSI-RS#13 corresponding to this TRP1 is SSB-Index#0 (or denoted as SSB#0), that is, the SSB signal identified as 0. The types of QCL relationship between the two reference signals (i.e., CSI-RS#13 and SSB-Index#0) are: Type A and Type D. This means that when measuring the channel quality between the two TRPs and the UE through CSI-RS#13, based on... Figure 7 As shown in the configuration information, when the UE receives CSI-RS#13, for the CSI-RS port related to TRP1, its Type A related large-scale channel information and the direction of the received beam are the same as those of SSB-Index#0.

[0109] Similarly, such as Figure 7 As shown in the QCL-Info 2 field, for CSI-RS#13 corresponding to TCI-State Id 13, the TRP is the cooperation point in ServCellIndex 2, and the reference signal with a QCL relationship with CSI-RS#13 corresponding to this TRP2 is SSB-Index#1 (or denoted as SSB#1), that is, the SSB signal identified as 1. The type of QCL relationship between the two reference signals (i.e., CSI-RS#13 and SSB-Index#1) is: Type B. This means that when measuring the channel quality between the two TRPs and the UE through CSI-RS#13, based on... Figure 7The configuration information shown can know that when the UE receives the CSI-RS#13, for the TRP2-related CSI-RS port, the Type B-related large-scale channel information and the receiving beam direction are the same as the SSB-Index#1.

[0110] For ease of understanding, reference can be made to Figure 8 , Figure 8 A logical diagram of a configuration relationship provided by the present disclosure. As Figure 8 shown, the base station can configure a terminal with a CSI-RS resource set, and the CSI-RS resource set can include multiple CSI-RS resources. For the NZP-CSI-RS-Resource 12, one of the CSI-RS resources, in the present disclosure, the CSI-RS resource corresponds to two TRPs, and the QCL information of each TRP is also indicated in the configuration signaling of the CSI-RS resource. Specifically, the CSI-RS resource corresponds to a TCI-State Id, which is used to indicate the QCL relationship of the 2 TRPs. The specific indication content can be referred to in the foregoing, and will not be repeated here.

[0111] In summary, the present disclosure allocates one channel state information reference signal resource for multiple TRPs, and can indicate the quasi-co-location information of each cooperation point in the channel state information reference signal resource through different configuration methods, and play the actual role of the quasi-co-location information, so as to facilitate the terminal to perform better channel estimation.

[0112] On the basis of any one of the foregoing embodiments, the present disclosure further provides configuration information between the TRP and the antenna port (port).

[0113] In an exemplary embodiment, the configuration information between the TRP and the antenna port (port) can be synchronized or agreed between the base station and the terminal in the form of a preset rule before the present scheme is executed, so that it is not necessary to repeat the configuration every time. Alternatively, in another exemplary embodiment, the configuration information between the TRP and the antenna port (port) can also be carried in the configuration signaling and sent in real time.

[0114] Specifically, the configuration information between the TRP and the antenna port (port) can include the following contents: the antenna ports occupied by one channel state information reference signal resource (i.e. target resource) corresponding to each cooperation point are divided according to a preset logical order; and wherein the number of antenna ports occupied by one channel state information reference signal resource (i.e. target resource) corresponding to each cooperation point is related to the number of code division multiplexing groups (i.e. CDM groups).

[0115] The number of antenna ports occupied by each cooperation point corresponding to one channel state information reference signal resource is related to the number of code division multiplexing groups (CDM groups), including two cases:

[0116] When the number of code division multiplexing groups is equal to the number of cooperation points, the antenna ports occupied by the target resource (i.e., one channel state information reference signal resource corresponding to each cooperation point) correspond one-to-one to the antenna ports corresponding to the code division multiplexing groups.

[0117] Or,

[0118] When the number of code division multiplexing groups is N times the number of cooperation points, the antenna ports occupied by the target resource (i.e., one channel state information reference signal resource corresponding to each cooperation point) correspond to the antenna ports corresponding to N code division multiplexing groups, where N is an integer greater than 1.

[0119] Specifically, the logical order can be preset in advance, and the preset manner of the disclosure is not limited. For example, the ports can be divided in order or reverse order according to the port identifier, or the ports can also be divided according to the interval order. Taking a scenario with 8 ports and 2 TRPs as an example. For example, if the ports are divided in order according to the port identifier, the first 4 ports can be divided into TRP1 and the last 4 ports can be divided into TRP2. For another example, if the ports are divided by interval, port1, port3, port5, and port7 can be divided into TRP1, and port2, port4, port6, and port8 can be divided into TRP2. It should be understood that the examples herein are only exemplary descriptions and do not limit the number of ports, the identification manner, and the division manner.

[0120] There is a certain aggregation correspondence between the number of antenna port multiplexing and the CDM group. Based on the aggregation correspondence, it can be determined which antenna port corresponds to which CDM group. The aggregation correspondence can be referred to the communication protocol, which will not be described here. Based on this, only the relationship between the CDM group and the TRP needs to be determined. In actual scenarios, the number of CDM groups (denoted as Q) and the number of TRPs (denoted as K) can be the same or different. Based on the number of the two, the correspondence between the two can be determined in the following manner, so as to determine the correspondence between the TRP and the port, so that the all-round correspondence between the TRP, the CSI-RS, the QCL relationship, and the port can be realized.

[0121] Specifically, when the number of CDM groups is equal to the number of TRPs, i.e., Q=K, the antenna ports occupied by each cooperation point corresponding to one channel state information reference signal resource correspond one-to-one to the antenna ports corresponding to the CDM groups.

[0122] In an example embodiment, the TRP index and the CDM group index can be one-to-one corresponding in a preset logical order (e.g., in order, in reverse order, etc.), so that the antenna ports occupied by one channel state information reference signal resource corresponding to a TRP correspond to the antenna ports corresponding to the corresponding CDM group. Taking a scenario of 4 ports and 2 TRPs as an example, if the 4 ports correspond to 2 CDM groups, for example, port1, port2 correspond to CDM group 1, and port3, port4 correspond to CDM group 2, at this time, the number of TRPs is equal to the number of CDM groups, at this time, TRP1 can correspond to CDM group 1 and TRP2 can correspond to CDM group 2 in the order of identification, so that the relationship between the antenna ports can be determined. Specifically, the antenna ports occupied by one channel state information reference signal resource corresponding to TRP1 are port1, port2 corresponding to CDM group 1, and the antenna ports occupied by one channel state information reference signal resource corresponding to TRP2 are port3, port4 corresponding to CDM group 2.

[0123] When the number of CDM groups is N times the number of TRPs, that is, Q=N*K, the antenna ports occupied by one channel state information reference signal resource corresponding to a TRP correspond to the antenna ports corresponding to N groups of CDM groups, N is an integer greater than 1.

[0124] In an example embodiment, the TRP number and the CDM group number can be corresponded in a preset logical order (for example, in sequence, in reverse order, etc.), so that the antenna ports occupied by one channel state information reference signal resource corresponding to one TRP correspond to the antenna ports corresponding to N groups of CDM groups. Taking a scenario of 8 ports and 2 TRPs as an example, if the 8 ports correspond to 4 CDM groups, for example, port1 and port2 correspond to CDM group1, port3 and port4 correspond to CDM group2, port5 and port6 correspond to CDM group3, and port7 and port8 correspond to CDM group4, at this time, the number of CDM groups is twice the number of TRPs, then one TRP (the antenna ports occupied by one channel state information reference signal resource corresponding to the TRP) can correspond to 2 CDM groups (the antenna ports corresponding to the CDM groups). At this time, the TRP1 can be corresponded to CDM group1 and CDM group2, and the TRP2 can be corresponded to CDM group3 and CDM group4 according to a preset logical order, for example, according to the identification order, so that the relationship between the TRP and the antenna port can be determined. Specifically, the antenna ports occupied by one channel state information reference signal resource corresponding to the TRP1 are port1, port2, port3 and port4 corresponding to CDM group1 and CDM group2, and the antenna ports occupied by one channel state information reference signal resource corresponding to the TRP2 are port5, port6, port7 and port8 corresponding to CDM group3 and CDM group4.

[0125] Based on this, more specific quasi co-location information can be obtained in combination with the quasi co-location information described in the foregoing. For example, when the terminal receives one channel state information reference signal, for the port1 and port2 related to the TRP1, the part of the channel information of the channel state information reference signal is the same as the channel information of the reference signal indicated by the QCL relationship, wherein the part of the channel information refers to the channel information indicated by the QCL type.

[0126] In order to more fully illustrate the present scheme, the present disclosure further gives two embodiments for overall description.

[0127] Embodiment 1: A plurality of TCI-State Ids are used to indicate the quasi co-location information of a plurality of TRPs.

[0128] Taking the scenario shown in FIG. 1 as an example, please refer to Figure 3 , Figure 5 , Figure 6 and Figure 9 , wherein, Figure 9 is a configuration diagram of the quasi co-location information of a plurality of TRPs in a CJT scenario provided by the present disclosure.

[0129] As Figure 3 andFigure 9 As shown, TRP1 and TRP2 belong to the same serving cell. In specific implementation, TRP1 and TRP2 can respectively send out two SSBs (SSB1 and SSB2) on different time-frequency resources, and the UE accesses the serving cell Servingcell 1 through SSB1, while Servingcell 1 informs the UE to measure the channel quality (for example, measure RSRP) of other surrounding cells.

[0130] Based on the case as shown in Figure 3 When the base station configures the CSI-RS resource (i.e., channel state information reference signal resource) for the terminal, the same CSI-RS resource is allocated for the two TRPs, and the QCL relationship of the two TRPs is indicated through multiple TCI-State Ids in the CSI-RS resource. As in the foregoing Figure 5 As shown in the embodiment, the base station can configure the CSI-RS resource for the terminal with different cooperation points, and when configuring the NZP-CSI-RS-Resource, set qcl-InfoPeriodicCSI-RS in the high-layer signaling to the TCI-State Id that can indicate multiple TRPs, that is, indicate the quasi-co-location information of all cooperation points through one CSI-RS resource configuration. At this time, the channel quality of different TRPs is measured by one CSI-RS, and the quasi-co-location information of each TRP is associated with the resource configuration information of the CSI-RS.

[0131] Based on this, the terminal measures the channel information of multiple TRPs by using the same CSI-RS resource. Therefore, when the channel quality between 2 TRPs and the UE is measured through one CSI-RS#12, according to the above configuration information, when the UE receives the CSI-RS, the large-scale channel information related to the TypeA of the CSI-RS port related to TRP1 and the receiving beam direction are the same as SSB#0, and the large-scale channel information related to the TypeB of the CSI-RS port related to TRP2 is the same as SSB#1.

[0132] Further, it is also necessary to determine which ports of the CSI-RS#12 correspond to TRP1 and which ports correspond to TRP2. At this time, the correspondence between the number of antenna port multiplexing and the aggregation of CDM groups can be first determined based on the communication protocol, and then based on the relationship between the number of CDM groups and the number of TRPs, the ports corresponding to each TRP are determined.

[0133] For example, when the CSI-RS #12 configured by the base station for the terminal is ROW 7 (i.e., the aggregation correspondence shown in the 7th row of Table 7.4.1.5.3-1 in the communication protocol), 8 ports, CDM Type of fd-CDM2, and a total of 4 CDM groups. At this time, according to the setting, it can be determined that CDM group 0 (or denoted as CDM0) corresponds to port 3000, port 3001, CDM1 corresponds to port 3002, port 3003, CDM2 corresponds to port 3004, port 3005, and CDM3 corresponds to port 3006, port 3007. Based on this, the number of CDM groups is 2 times the number of TRPs, and therefore, based on the identification order relationship, TRP1 corresponds to CDM0 and CDM1, and TRP2 corresponds to CDM2 and CDM3. Therefore, the correspondence between TRP and port can be determined: the antenna ports occupied by the channel state information reference signal resource corresponding to TRP1 are: port 3000, port 3001, port 3002, and port 3003; and the antenna ports occupied by the channel state information reference signal resource corresponding to TRP2 are: port 3004, port 3005, port 3006, and port 3007.

[0134] From the above information, it can be known that when the terminal receives the CSI-RS #12, the Type A related large-scale channel information and the receiving beam direction of the port 3000, port 3001, port 3002, and port 3003 related to TRP1 are the same as those of the SSB #0, and the Type B related large-scale channel information of the port 3004, port 3005, port 3006, and port 3007 related to TRP2 is the same as that of the SSB #1.

[0135] The terminal can feed back the channel information of the CSI-RS based on the above quasi co-location information, so that the base station can determine whether to notify the terminal to enter the Multi-TRP mode based on the channel information reported by the terminal. Correspondingly, if the terminal receives the notification of the base station indicating to enter the Multi-TRP mode, the terminal enters the Multi-TRP mode.

[0136] Embodiment 2: Multiple QCL-Info fields in one TCI-State Id are used to indicate the quasi co-location information of multiple TRPs.

[0137] For example, the scenario shown in Figure 4 is taken as an example, and Figure 7 , Figure 8 and Figure 10 are referred to. Figure 10Another multi-TRP quasi co-location information configuration diagram in the CJT scenario provided by the present disclosure.

[0138] As shown in Figure 4 As shown in Figure 10 TRP1 and TRP2 belong to different serving cells. In actual implementation, TRP1 and TRP2 can respectively output two SSBs (SSB1 and SSB2) on different time-frequency resources, and the UE accesses the primary serving cell Serving cell 1 through SSB1, while Serving cell 1 informs the UE to measure the channel quality (for example, RSRP, small-scale information, etc.) of other surrounding cells.

[0139] Based on the case as shown in Figure 4 When the base station configures the CSI-RS resource (i.e., channel state information reference signal resource) for the terminal, the same CSI-RS resource is allocated to the two TRPs, and the QCL relationship of the two TRPs is indicated through multiple QCL-Info fields in one TCI-State Id. As in the foregoing Figure 6 As shown in the foregoing embodiment, the base station can configure the CSI-RS resource for the terminal with different cooperation points. When configuring the NZP-CSI-RS-Resource, the qcl-InfoPeriodicCSI-RS in the high-layer signaling is set to one TCI-state Id, and multiple QCL-Info fields are configured in the TCI-state Id, each of which is used to indicate the quasi co-location information of one cooperation point. At this time, the UE can be informed by the primary cell (Serving cell 1) of the quasi co-location information of the port associated with each cooperation point.

[0140] Based on this, the terminal measures the channel information of multiple TRPs by using the same CSI-RS resource. Thus, when the channel quality between the two TRPs and the UE is measured through one CSI-RS#13, according to the foregoing configuration information, when the UE receives the CSI-RS, the Type A related large-scale channel information and the receiving beam direction of the CSI-RS port related to TRP1 are the same as those of SSB#0; and the Type B related large-scale channel information of the CSI-RS port related to TRP2 is the same as that of SSB#1.

[0141] Further, it is also necessary to determine which ports of the CSI-RS#13 belong to TRP1 and which ports belong to TRP2. At this time, the aggregation correspondence relationship between the number of antenna port multiplexing and the CDM group can be determined based on the communication protocol first, and then the ports corresponding to each TRP can be determined based on the relationship between the number of CDM groups and the number of TRPs.

[0142] For example, when the CSI-RS #13 configured by the base station for the terminal is ROW4 (i.e. the aggregation correspondence shown in the 4th row in the communication protocol Table 7.4.1.5.3-1), the number of ports is 4, the CDM Type is fd-CDM2, and there are 2 CDM groups. At this time, according to the setting, it can be determined that the CDM group 0 (or denoted as CDM0) corresponds to the port 3000, port 3001, and the CDM2 corresponds to the port 3002, port 3003. Based on this, the number of CDM groups is equal to the number of TRPs, and then based on the identification order relationship, TRP1 is corresponded to CDM0, and TRP2 is corresponded to CDM1. Thus, the correspondence between the TRP and the port can be determined: the antenna ports occupied by the channel state information reference signal resource corresponding to TRP1 are: port 3000, port 3001; and the antenna ports occupied by the channel state information reference signal resource corresponding to TRP2 are: port 3002, port 3003.

[0143] According to the above information, when the terminal receives the CSI-RS #13, the Type A related large-scale channel information and the receiving beam direction of the port 3000, port 3001 related to TRP1 are the same as those of the SSB #0, and the Type B related large-scale channel information of the port 3002, port 3003 related to TRP2 is the same as that of the SSB #1.

[0144] The terminal can feed back the channel information of the CSI-RS based on the above quasi co-location information, so that the base station can determine whether to notify the terminal to enter the Multi-TRP mode based on the channel information reported by the terminal. Correspondingly, if the terminal receives the notification of the base station indicating to enter the Multi-TRP mode, the terminal enters the Multi-TRP mode.

[0145] The present disclosure also provides a reference signal configuration method. The method is applied to a terminal. Please refer to Figure 11 , Figure 11 Another flowchart of a reference signal configuration method provided by an embodiment of the present disclosure is shown in FIG. 11B. As shown in FIG. 11B, the method includes the following steps. Figure 11

[0146] S1102, receiving configuration signaling of a downlink channel state information reference signal resource from a base station, the configuration signaling being used to indicate that one channel state information reference signal resource includes quasi co-location information of each cooperation point.

[0147] S1104, measuring channel state information of each cooperation point based on the configuration signaling.

[0148] ​The number of antenna ports occupied by the target resource is related to the number of code division multiplexing groups; the antenna ports occupied by the target resource are divided according to a preset logical order; the target resource is one channel state information reference signal resource corresponding to each cooperation point.

[0149] The terminal-side method is the opposite side of the base station-side method, and related content can be referred to the foregoing, which will not be repeated here.

[0150] The present disclosure also provides a reference signal configuration device, which can be provided or integrated in a base station. Figure 12 As shown in the structure block diagram of a reference signal configuration device provided by an embodiment of the present disclosure, Figure 12 The reference signal configuration device 1200 includes:

[0151] A determination unit 1210 is configured to determine configuration signaling of a downlink channel state information reference signal resource, the configuration signaling being used to indicate that one channel state information reference signal resource includes quasi co-location information of each cooperation point.

[0152] A transceiver unit 1220 is configured to send the configuration signaling to a terminal.

[0153] The number of antenna ports occupied by the target resource is related to the number of code division multiplexing groups; the antenna ports occupied by the target resource are divided according to a preset logical order; the target resource is one channel state information reference signal resource corresponding to each cooperation point.

[0154] In an exemplary embodiment, the quasi co-location information of any one cooperation point includes: a reference signal identifier having a quasi co-location relationship, and a quasi co-location relationship type.

[0155] In an exemplary embodiment, the configuration signaling includes a plurality of transmission configuration indication identifiers, and any one transmission configuration indication identifier is used to indicate the quasi co-location information of one cooperation point.

[0156] In an exemplary embodiment, the configuration signaling includes one transmission configuration indication identifier, and the transmission configuration indication identifier includes a plurality of quasi co-location information fields, and any one quasi co-location information field is used to indicate the quasi co-location information of one cooperation point.

[0157] In an exemplary embodiment, the number of antenna ports occupied by the target resource is related to the number of code division multiplexing groups, including:

[0158] When the number of code division multiplexing groups is equal to the number of cooperation points, the antenna ports occupied by the target resource correspond one-to-one to the antenna ports corresponding to the code division multiplexing groups.

[0159] When the number of code division multiplexing groups is N times the number of cooperation points, the antenna ports occupied by the target resource correspond to the antenna ports corresponding to N groups of code division multiplexing groups, N being an integer greater than 1.

[0160] The present disclosure also provides a reference signal configuration device, which can be provided or integrated in a terminal. Figure 13 Another structural block diagram of a reference signal configuration device provided by an embodiment of the present disclosure is shown in Figure 13 The reference signal configuration device 1300 includes:

[0161] The transceiving unit 1310 is configured to receive configuration signaling of a downlink channel state information reference signal resource from a base station, the configuration signaling being used to indicate that one channel state information reference signal resource includes quasi co-location information of each cooperation point.

[0162] The processing unit 1320 is configured to measure channel state information of each cooperation point based on the configuration signaling.

[0163] The number of antenna ports occupied by the target resource is related to the number of code division multiplexing groups; the antenna ports occupied by the target resource are divided according to a preset logical order; and the target resource is one channel state information reference signal resource corresponding to each cooperation point.

[0164] In an exemplary embodiment, the quasi co-location information of any one cooperation point includes a reference signal identifier having a quasi co-location relationship and a quasi co-location relationship type.

[0165] In an exemplary embodiment, the configuration signaling includes a plurality of transmission configuration indication identifiers; and any one transmission configuration indication identifier is used to indicate quasi co-location information of one cooperation point.

[0166] In an exemplary embodiment, the configuration signaling includes one transmission configuration indication identifier, the transmission configuration indication identifier includes a plurality of quasi co-location information fields, and any one quasi co-location information field is used to indicate quasi co-location information of one cooperation point.

[0167] In an exemplary embodiment, the number of antenna ports occupied by the target resource is related to the number of code division multiplexing groups, including:

[0168] When the number of code division multiplexing groups is equal to the number of cooperation points, the antenna ports occupied by the target resource one-to-one correspond to the antenna ports corresponding to the code division multiplexing groups.

[0169] When the number of code division multiplexing groups is N times the number of cooperation points, the antenna ports occupied by the target resource correspond to the antenna ports corresponding to N groups of code division multiplexing groups, N being an integer greater than 1.

[0170] Figure 14 A hardware block diagram of an electronic device is provided for embodiments of the present disclosure. The electronic device 1400 according to embodiments of the present disclosure at least includes a processor; and a memory for storing computer readable instructions. When the computer readable instructions are loaded and run by the processor, the processor performs the reference signal configuration method according to any one of the preceding embodiments of the present disclosure.

[0171] Figure 14 The electronic device 1400 shown specifically includes a central processing unit (CPU) 1401, a graphics processing unit (GPU) 1402, and a memory 1403. These units are connected to each other through a bus 1404. The central processing unit (CPU) 1401 and / or the graphics processing unit (GPU) 1402 can be used as the processor described above, and the memory 1403 can be used as the memory for storing computer readable instructions described above. In addition, the electronic device 1400 can further include a communication unit 1405, a storage unit 1406, an output unit 1407, an input unit 1408, and an external device 1409, which are also connected to the bus 1404.

[0172] Figure 15 A schematic diagram of a computer readable storage medium is provided for embodiments of the present disclosure. As shown, the computer readable storage medium 1500 according to embodiments of the present disclosure has computer readable instructions 1501 stored thereon. When the computer readable instructions 1501 are run by a processor, the reference signal configuration method according to any one of the preceding embodiments of the present disclosure described with reference to the above figures is performed. The computer readable storage medium includes, but is not limited to, for example, volatile memory and / or non-volatile memory. The volatile memory may, for example, include random access memory (RAM) and / or cache memory, etc. The non-volatile memory may, for example, include read-only memory (ROM), hard disk, flash memory, optical disc, magnetic disc, etc. Figure 15 The present disclosure still further provides a computer program product, including a computer program, which, when executed by a processor, implements the reference signal configuration method according to any one of the preceding embodiments of the present disclosure.

[0173] Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether the functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. A person skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present disclosure.

[0174]

[0175] ​The above describes the basic principles of the present disclosure in conjunction with specific embodiments, but it should be noted that the advantages, benefits, effects and the like mentioned in the present disclosure are only examples and are not limiting, and these advantages, benefits, effects and the like cannot be considered as necessary for each embodiment of the present disclosure. In addition, the specific details of the above disclosure are only for the purpose of example and understanding, and are not limiting, and the above details do not limit the present disclosure to be necessarily implemented with the above specific details.

[0176] The block diagrams of the devices, apparatuses, equipment, systems involved in the present disclosure are only illustrative examples and are not intended to require or imply that the connections, arrangements, configurations shown in the block diagrams must be connected, arranged, configured. As those skilled in the art will recognize, these devices, apparatuses, equipment, systems can be connected, arranged, configured in any manner. Words such as "include", "contain", "have" and the like are open-ended words, mean "including but not limited to", and can be used interchangeably. The words "or" and "and" used herein mean the word "and / or", and can be used interchangeably unless the context clearly indicates otherwise. The word "such as" used herein means the phrase "such as but not limited to", and can be used interchangeably.

[0177] In addition, as used herein, "or" used in the list of items preceded by "at least one of" means a disjunctive list, such that, for example, a list of "at least one of A, B, or C" means A or B or C, or AB or AC or BC, or ABC (i.e., A and B and C). Furthermore, the phrase "example of" does not mean the example described is preferred or better than other examples.

[0178] It should also be noted that in the systems and methods of the present disclosure, the components or steps can be decomposed and / or recombined. These decompositions and / or recombinations should be considered equivalents of the present disclosure.

[0179] Various changes, substitutions and alterations can be made to the techniques described herein without departing from the teachings of the technology defined by the appended claims. Also, the scope of the claims of the present disclosure is not limited to the specific aspects of the process, machine, manufacture, composition of matter, means, methods and acts of the above described. Processes, machines, manufacture, compositions of matter, means, methods or acts currently existing or later developed that perform substantially the same function or achieve substantially the same result as the corresponding aspects described herein can be utilized. Accordingly, the appended claims include within their scope such processes, machines, manufacture, compositions of matter, means, methods or acts.

[0180] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other aspects without departing from the scope of the disclosure. Thus, the present disclosure is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0181] The above description has been presented to enable any person skilled in the art to make or use the disclosure. Furthermore, the purpose of the above description is not intended to limit the embodiments of the present disclosure to the form disclosed herein. Although various example aspects and embodiments have been discussed above, those of ordinary skill in the art will appreciate a variety of modifications, alternatives, permutations, additions, and sub-combinations of the described aspects and embodiments.

Claims

1. A method for reference signal configuration, characterized in that, The method comprises: determining configuration signaling of downlink channel state information reference signal resources, the configuration signaling being used to indicate that one channel state information reference signal resource comprises quasi co-location information of each cooperation point; sending the configuration signaling to a terminal; wherein a number of antenna ports occupied by a target resource is related to a number of code division multiplexing groups; antenna ports occupied by the target resource are divided according to a preset logical order; wherein the target resource is one channel state information reference signal resource corresponding to each cooperation point.

2. The method of claim 1, wherein, The quasi co-location information of any one cooperation point comprises: a reference signal identifier having a quasi co-location relationship, and a quasi co-location relationship type.

3. The method of claim 2, wherein, The configuration signaling comprises a plurality of transmission configuration indication identifiers; any one transmission configuration indication identifier is used to indicate quasi co-location information of one cooperation point.

4. The method of claim 2, wherein, The configuration signaling comprises one transmission configuration indication identifier, and the transmission configuration indication identifier comprises a plurality of quasi co-location information fields, and any one quasi co-location information field is used to indicate quasi co-location information of one cooperation point.

5. The method according to any one of claims 1 to 4, characterized in that, The number of antenna ports occupied by the target resource is related to the number of code division multiplexing groups, comprising: when the number of code division multiplexing groups is equal to the number of cooperation points, the antenna ports occupied by the target resource correspond to the antenna ports corresponding to the code division multiplexing groups one by one; when the number of code division multiplexing groups is N times of the number of cooperation points, the antenna ports occupied by the target resource correspond to the antenna ports corresponding to N groups of code division multiplexing groups, N being an integer greater than 1.

6. A reference signal configuration method, comprising: The method comprises: receiving configuration signaling of downlink channel state information reference signal resources from a base station, the configuration signaling being used to indicate that one channel state information reference signal resource comprises quasi co-location information of each cooperation point; based on the configuration signaling, measuring channel state information of each cooperation point; wherein a number of antenna ports occupied by a target resource is related to a number of code division multiplexing groups; antenna ports occupied by the target resource are divided according to a preset logical order; wherein the target resource is one channel state information reference signal resource corresponding to each cooperation point.

7. A reference signal configuration device, characterized in that, The apparatus comprises: a determining unit configured to determine configuration signaling of downlink channel state information reference signal resources, the configuration signaling being used to indicate that one channel state information reference signal resource comprises quasi co-location information of each cooperation point; a transceiver unit configured to send the configuration signaling to a terminal; wherein a number of antenna ports occupied by a target resource is related to a number of code division multiplexing groups; antenna ports occupied by the target resource are divided according to a preset logical order; wherein the target resource is one channel state information reference signal resource corresponding to each cooperation point.

8. A reference signal configuration device, characterized in that, The apparatus comprises: a transceiver unit configured to receive configuration signaling of downlink channel state information reference signal resources from a base station, the configuration signaling being used to indicate that one channel state information reference signal resource comprises quasi co-location information of each cooperation point; a processing unit configured to measure channel state information of each cooperation point based on the configuration signaling; The number of antenna ports occupied by the target resource is related to the number of code division multiplexing groups; the antenna ports occupied by the target resource are divided according to a preset logical order; the target resource is a channel state information reference signal resource corresponding to each cooperation point.

9. An electronic device, comprising: Comprising: a memory for storing computer readable instructions; and a processor for running the computer readable instructions, causing the electronic device to perform the method of any one of claims 1-6.

10. A non-transitory computer-readable storage medium storing computer-readable instructions, the computer-readable instructions comprising: When the computer readable instructions are executed by the processor, the processor performs the method of any one of claims 1-6.

11. A computer program product, characterised in that, A computer program that, when executed by a processor, implements the method of any one of claims 1-6.

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