CN120979615A - Reference signal configuration method and device, electronic equipment, storage medium and product - Google Patents

Abstract

This disclosure provides a reference signal configuration method and apparatus, electronic device, storage medium, and product. In this method, a base station determines configuration signaling for a downlink channel state information (CSS) reference signal resource. The configuration signaling indicates that a CSS reference resource includes quasi-co-address information for each cooperating point. The base station sends the configuration signaling to a terminal. The number of antenna ports occupied by the target resource is related to the number of code division multiplexing (CDM) groups. The antenna ports occupied by the target resource are divided according to a preset logical order. The target resource is a CSS reference resource corresponding to each cooperating point. This disclosure achieves measurement and feedback for multiple cooperating points through a CSS reference resource carrying quasi-co-address information for each cooperating point, improving real-time performance and reducing feedback overhead.

Description

Reference signal configuration methods and apparatus, electronic devices, storage media and products

Technical Field

This disclosure relates to the field of communication technology, and in particular to a reference signal configuration method and apparatus, electronic device, storage medium and product.

Background Technology

In Multi-TRP scenarios, after initial access to the primary serving cell, the terminal uses a time-division multiplexing approach, employing CSI-RS to perform channel measurements and feedback from multiple surrounding cooperating points. In existing technologies, one CSI-RS resource corresponds to one TRP. When the number of cooperating points increases, the latency of this measurement method also increases significantly, resulting in poor real-time performance of the measurement data, failing to meet the performance requirements of coherent transmission, and incurring substantial feedback overhead.

Summary of the Invention

This disclosure provides a reference signal configuration method and apparatus, electronic device, storage medium and product, which enables measurement and feedback of multiple cooperative points through a channel state information reference signal resource carrying quasi-co-location information of each cooperative point, thereby improving real-time performance and reducing feedback overhead.

In a first aspect, this disclosure provides a reference signal configuration method, including:

The configuration signaling for determining downlink channel state information reference signal resources is used to indicate that a channel state information reference signal resource includes quasi-co-address information of each cooperating point;

Send the configuration signaling to the terminal;

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 a channel state information reference signal resource corresponding to each cooperative point.

Secondly, this disclosure provides a reference signal configuration method, including:

Receive configuration signaling for downlink channel state information reference signal resources from a base station, wherein the configuration signaling is used to indicate that a channel state information reference signal resource includes quasi-co-location information of each cooperating point;

Based on the configured signaling, the channel state information of each cooperating point is measured;

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 a channel state information reference signal resource corresponding to each cooperative point.

Thirdly, this disclosure provides a reference signal configuration apparatus, including:

The determining unit is used to determine the configuration signaling of the downlink channel state information reference signal resource, wherein the configuration signaling is used to indicate that a channel state information reference signal resource includes quasi-co-address information of each cooperating point;

The transceiver unit is used to send the configuration signaling to the terminal;

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 a channel state information reference signal resource corresponding to each cooperative point.

Fourthly, this disclosure provides a reference signal configuration apparatus, comprising:

The transceiver unit is used to receive configuration signaling from the base station for downlink channel state information reference signal resources. The configuration signaling is used to indicate that a channel state information reference signal resource includes quasi-co-location information of each cooperating point.

The processing unit is used to measure the channel state information of each cooperating 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; and the target resource is a channel state information reference signal resource corresponding to each cooperative point.

Fifthly, this disclosure provides an electronic device, including: a memory for storing computer-readable instructions; and a processor for executing the computer-readable instructions, causing the electronic device to perform the method as described in any embodiment of the first or second aspect.

In a sixth aspect, this disclosure provides a non-transitory computer-readable storage medium for storing computer-readable instructions that, when executed by a processor, cause the processor to perform the method as described in any embodiment of the first or second aspect.

In a seventh aspect, this disclosure provides a computer program product, including a computer program that, when executed by a processor, implements the method as described in any embodiment of the first or second aspect.

This disclosure provides a reference signal configuration method and apparatus, electronic device, storage medium, and product. When a base station configures downlink channel state information (CSO) reference signal resources for a terminal, it configures one CSO reference signal resource for multiple cooperating points. The configuration signaling indicates that the CSO reference signal resource includes quasi-co-address information for each cooperating point. Specifically, one CSO reference signal resource corresponding to each cooperating point is considered as a target resource. The number of antenna ports occupied by the target resource is related to the number of code division multiplexing (CDM) groups. Furthermore, the antenna ports occupied by the target resource are divided according to a preset logical order. Thus, by combining the aggregation correspondence between the number of multiplexed antenna ports and the CDM groups, a comprehensive correspondence between the cooperating points, downlink CSO reference signals, CSO reference signal resources, QCL relationships, and antenna ports can be determined. Therefore, in multi-cooperating point scenarios, channel state measurement and feedback for multiple cooperating points can be achieved through a single CSO reference signal resource. This reduces measurement latency and improves real-time performance, while also allowing for reasonable reuse of quasi-co-address information to reduce feedback overhead. In summary, the technical solution provided in this disclosure can improve real-time performance and reduce feedback overhead, improve the performance of coherent transmission, and better ensure a consistent user experience.

It should be understood that both the foregoing general description and the following detailed description are exemplary and intended to provide further illustration of the claimed technology.

Attached Figure Description

The above and other objects, features, and advantages of this disclosure will become more apparent from the more detailed description of the embodiments thereof in conjunction with the accompanying drawings. The drawings are provided to further illustrate the embodiments of this disclosure and form part of the specification. They are used together with the embodiments of this disclosure to explain the disclosure and do not constitute a limitation thereof. In the drawings, the same reference numerals generally represent the same components or steps.

Figure 1 is a schematic diagram of multi-TRP interaction in the prior art;

Figure 2 is a flowchart illustrating a reference signal configuration method provided in this disclosure;

Figure 3 is a schematic diagram of a multi-TRP scenario provided in this disclosure;

Figure 4 is a schematic diagram of another multi-TRP scenario provided in this disclosure;

Figure 5 is a schematic diagram of a configuration signaling structure provided in this disclosure;

Figure 6 is a logical diagram of a configuration relationship provided in this disclosure;

Figure 7 is a schematic diagram of a configuration signaling structure provided in this disclosure;

Figure 8 is a logical diagram of a configuration relationship provided in this disclosure;

Figure 9 is a schematic diagram of quasi-co-address information configuration for multiple TRPs in the CJT scenario provided in this disclosure;

Figure 10 is a schematic diagram of another quasi-co-address information configuration for multiple TRPs in the CJT scenario provided in this disclosure;

Figure 11 is a flowchart illustrating another reference signal configuration method provided in an embodiment of this disclosure;

Figure 12 is a structural block diagram of a reference signal configuration device provided in an embodiment of this disclosure;

Figure 13 is a structural block diagram of another reference signal configuration device provided in an embodiment of this disclosure;

Figure 14 is a hardware block diagram of an electronic device provided in an embodiment of this disclosure;

Figure 15 is a schematic diagram of a computer-readable storage medium provided in an embodiment of this disclosure.

Detailed Implementation

To make the objectives, technical solutions, and advantages of this disclosure more apparent, exemplary embodiments according to this disclosure will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this disclosure, and not all embodiments of this disclosure. It should be understood that this disclosure is not limited to the exemplary embodiments described herein.

This disclosure can be applied to various communication systems. Exemplary examples include, but are not limited to: Global System for Mobile communication (GSM), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), General Packet Radio Service (GPRS), Long Term Evolution (LTE), Advanced Long Term Evolution (LTE-A), New Radio (NR), evolutions of NR systems, LTE-based access to unlicensed spectrum (LTE-U), NR-based access to unlicensed spectrum (NR-U), Non-Terrestrial Networks (NTN), Universal Mobile Telecommunication System (UMTS), and Wireless Local Area Networks (WLANs). Networks, WLAN, Wireless Fidelity (WiFi), 5th-Generation (5G) systems, distributed massive MIMO systems in 6G networks (or cell-free massive MIMO) or other communication systems, etc.

In this disclosure, network-side equipment can specifically include base stations, evolved NodeBs (eNodeBs), transmission reception points (TRPs), next-generation NodeBs (gNBs) in 5G mobile communication systems, next-generation base stations in 6G mobile communication systems, base stations in future mobile communication systems, or access nodes in wireless fidelity (WiFi) systems; it can also be modules or units that perform some of the functions of a base station, such as centralized units (CUs) or distributed units (DUs). Radio access network equipment can be macro base stations, micro base stations, indoor stations, or relay nodes, etc. This disclosure does not impose any particular restrictions on the specific technologies or equipment forms used in the radio access network equipment. For ease of description, the following description uses a base station as an example of radio access network equipment.

A terminal, also known as a terminal device, user equipment (UE), mobile station, or mobile terminal, is capable of communicating with network-side devices. Specifically, terminals can be widely used in various scenarios, such as device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), the Internet of Things (IoT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grids, smart furniture, smart offices, smart wearables, smart transportation, and smart cities. Therefore, terminals can be, but are not limited to, mobile phones, tablets, computers with wireless transceiver capabilities, wearable devices, vehicles, drones, helicopters, airplanes, ships, robots, robotic arms, and smart home devices. This application does not impose any particular restrictions on the specific technology or device form used in the terminal.

Both base stations and terminals can be collectively referred to as communication devices. A base station can also be called a communication device with base station functions, and a terminal can be called a communication device with terminal functions. Base stations and terminals can be fixed in location or mobile. They can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; and they can be deployed in the air on aircraft, balloons, and artificial satellites. This application embodiment does not impose any particular limitations on the application scenarios of base stations and terminals.

To facilitate understanding, a brief explanation of the technical terms used in this disclosure will be provided first.

Multi-TRP (Multi-Transmission and Receiving Point) is a type of cooperative point for transmitting and receiving data. It can be abbreviated as mTRP or multi-TRP.

SSB (Synchronization Signal/PBCH Block): TRP can send SSB for channel measurement and feedback.

Serving cell refers to the cell that is being served.

CSI-RS (Channel State Information-Reference Signal) can be used to measure channel state information (CSI). CSI includes at least: Channel Quality Indicator (CQI), Rank Indicator (RI), and Precoder Matrix Indicator (PMI).

The CSI-RS resource set refers to the CSI-RS resource set. Specifically, the CSI-RS resource refers to the signal resources of the Measurement Channel State Information Reference Signal.

QCL, or Quasi Colocation, refers to the ability to estimate the radio channel attributes of two antenna ports based on their QCL relationship. In other words, channel estimation results obtained from one antenna port can be used for the other. Radio channel attributes include, but are not limited to, at least one of the following: Doppler spread/offset, average delay, delay spread, average gain, and spatial receiver parameters (i.e., analog beamforming information). Specifically, there are at least four QCL types, each corresponding to different radio channel attributes. In this context, QCL Type A relationship indicates that two ports have the same Doppler shift, Doppler spread, average delay, and delay spread; QCL Type B relationship indicates that two ports have the same Doppler shift and Doppler spread; QCL Type C relationship indicates that two ports have the same average delay and Doppler shift; and QCL Type D relationship indicates that two ports have the same Spatial Rx parameter (analog beam information).

CSI-RS resource Config is used to configure CSI-RS resources.

NZP-CSI-RS-Resource is a cell used to configure NZP (None Zero Power) CSI-RS, where NZP CSI-RS is used to obtain channel status.

qcl-InfoPeriodicCSI-RS is a higher-level signaling in NZP-CSI-RS-Resource, which includes QCL resource signals and QCL-type TCI-State. If the TCI-State is configured with a reference signal with QCL-Type D, this RS can be an SSB located on the same or different CC/BWP or another CSI-RS.

TCI-State Id is a transmission configuration indicator used to configure QCL relationships. Specifically, the parameters of TCI-State Id are used to configure a quasi-co-address relationship between 1-2 downlink reference signals and the DMRS (DeModulation Reference Signal) of the PDSCH (Physical Downlink Shared Channel). TCI stands for Transmission Configuration Indicator, and it is the field in DCI used to indicate the quasi-co-address of the PDSCH antenna ports.

QCL-Info, meaning Quasi-co-address information, is a field in TCI-State Id used to indicate quasi-co-address information for different cooperating points.

CDM (code division multiplexing) is a communication method that uses the orthogonality of the code structure of each signal to achieve multiplexing.

CSI-RS port, the antenna port of CSI-RS.

CJT (coherent joint transmission) involves transmitting data through multiple TRPs for joint beamforming. This coordinates the precoding matrices of different TRPs to ensure coherent superposition of the data stream at the receiver. The precoding matrices of multiple TRPs are then processed into a higher-dimensional antenna array to achieve higher beamforming gain.

RSRP (Reference Signal Receiving Power) is a parameter used to measure channel quality.

Secondly, a brief description of the application scenarios of this disclosure is provided.

Distributed massive MIMO systems (or cell-free massive MIMO) in 6G networks represent a significant direction in the evolution of ultra-large-scale antennas. They combine the advantages of massive MIMO and distributed antenna technologies. Building upon massive MIMO, they disperse the previously centralized antenna arrays across the cell, centering on the user and relying on intelligent interaction and collaboration among multiple nodes. By integrating multi-band transmission characteristics, they eliminate inter-cell interference and improve spectrum resource utilization while mitigating the physical challenges of multiplying the radio frequency and antenna counts required by traditional centralized MIMO. This enhances system scalability and reliability, making a borderless user experience possible in 6G networks. Cooperative Multipoint Transmission (CoMP) in 4G and Multi-TRP (Multi-Transmitter Cooperative Point) technology in 5G represent early explorations in the practical application of distributed massive MIMO technology.

This disclosure is specifically applied to the Multi-TRP scenario, and further, to the specific application scenario in which the base station configures CSI-RS resources for the terminal in the Multi-TRP scenario.

In a Multi-TRP scenario, the serving cell can schedule resources from multiple TRP units for a single terminal, thereby improving network performance in terms of coverage, reliability, and data rate.

Please refer to Figure 1, which is a schematic diagram of multi-TRP interaction in the prior art. As shown in Figure 1, in a serving cell, services are provided to the UE through two TRPs (TRP1 and TRP2), where TRP1 is the serving TRP in the serving cell. As shown in Figure 1, the two TRPs transmit SSB#1 and SSB#2 in a time-division multiplexing manner. For the terminal, it first establishes a connection with TRP1 through the initial access procedure and obtains the system message of TRP1 (including information such as serving cell ID#1) from SSB#1. Subsequently, the terminal needs to perform channel measurement and feedback on multiple cooperating points in the vicinity. For example, in the disconnected state, it measures SSB#2 sent by TRP2, feeds back RSRP information to the network side, and obtains the system message of TRP2 (including information such as serving cell ID#2). Alternatively, for example, in the connected state, it measures the channel quality of the two TRPs separately through CSI-RS and feeds back information such as PMI (precoder matrix) to achieve coherent transmission of multiple TRPs. Finally, the network side determines whether the terminal is operating in Multi-TRP mode based on the measurement results of multiple cells of the terminal.

In the multi-TRP interaction process shown in Figure 1, the terminal needs to perform channel measurements and feedback from multiple cooperating points. Specifically, channel measurements and feedback are performed separately using a time-division multiplexing approach. Based on this, the network-side equipment needs to configure multiple CSI-RS resource sets, with each CSI-RS resource in each set corresponding to a specific TRP. Thus, when the terminal feeds back channel measurement results to the network side, it also feeds back the channel quality information measured by the CSI-RS corresponding to different TRPs separately. When the number of cooperating points increases significantly, this time-division-based measurement and feedback mechanism leads to increased measurement latency. Consequently, the real-time performance of the channel quality information fed back by the terminal is poor, which has a significant 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 it can measure it, resulting in significant latency and compromising data real-time performance. Furthermore, this one-to-one measurement feedback method uses different CSI-RS resources to measure different TRP channels, which requires channel quality information to be fed back separately for each CSI-RS resource, resulting in a large feedback overhead.

Based on the aforementioned problems of the prior art, this disclosure provides a new design concept: using a channel state information reference signal resource (i.e., a channel state information reference signal resource, hereinafter referred to as signal resource) to realize the measurement and feedback of multiple TRPs, wherein the network device specifies the QCL relationship of multiple TRPs in the configuration signaling for configuring the channel state information reference signal resource for the terminal, and determines the correspondence between TRP, channel state information reference signal and antenna port based on the relationship between the number of code division multiplexing groups and antenna port multiplexing, the preset logical order division relationship, and the relationship between the number of code division multiplexing groups and the number of TRPs.

The following is a detailed explanation.

This disclosure provides a reference signal configuration method applied to a base station (i.e., network-side equipment).

Please refer to Figure 2, which is a flowchart illustrating a reference signal configuration method provided in this disclosure. As shown in Figure 2, the method includes:

S202, determine the configuration signaling for downlink channel state information reference signal resources. The configuration signaling is used to indicate that a channel state information reference signal resource includes quasi-co-location information of each cooperating point.

It should be understood that in the scenario corresponding to this configuration signaling, one channel state information reference signal resource (also known as downlink channel state information reference signal resource, or simply signal resource in the downlink channel state information reference signal resource configuration scenario) corresponds to multiple cooperative points and can be used to realize the measurement and feedback of multiple TRPs.

S204, send configuration signaling to the terminal;

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 a channel state information reference signal resource corresponding to each cooperative point.

This disclosure is specifically applied 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, referring to the downlink channel state information reference signal) is CSI-RS, then the channel state information reference signal resource (or may be referred to as: downlink channel state information reference signal resource, downlink reference signal resource, etc., with no particular restriction on the naming) is a CSI-RS resource. In this disclosure, one channel state information reference signal resource corresponds to multiple TRPs, but this disclosure does not impose any particular restriction on the specific number of TRPs; generally, it can be two or more. For ease of explanation, the following description will use the case of two TRPs as an example. Furthermore, in this disclosure, the multiple TRPs corresponding to one channel state information reference signal resource can belong to the same serving cell or different cells. Refer to Figures 3 and 4 in this case. Figure 3 is a schematic diagram of a multi-TRP scenario provided by this disclosure, and Figure 4 is a schematic diagram of another multi-TRP scenario provided by this disclosure. As shown in Figure 3, the terminal (i.e., the UE) can first access TRP1 in the primary serving cell, and then, through channel measurement and feedback from surrounding cooperating points (TRP2), operate in Multi-TRP mode under the instruction of the base station. In this way, TRP1 and TRP2 cooperate to provide services for the terminal. At this time, TRP1 and TRP2 are in the same serving cell. However, Figure 4 shows another situation where TRP1 and TRP2 are in different serving cells.

In the prior art shown in Figure 1, one Channel State Information Reference Signal Resource (CSI-RS Resource) corresponds to one TRP, and the QCL relationship of each TRP is configured separately. In contrast, this disclosure adopts an implementation method in which one CSI-RS Resource corresponds to multiple TRPs. Therefore, this disclosure also improves the quasi-co-address information carried in the configuration signaling: one CSI-RS Resource can carry the quasi-co-address information of multiple TRPs.

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.

Specifically, the quasi-co-address information of any TRP involved in this disclosure may include, but is not limited to: reference signal identifiers with QCL relationships and QCL relationship types. It should be understood that in actual implementation scenarios, the quasi-co-address information may also include other information. For example, in the scenarios shown in Figures 5 and 6, the quasi-co-address information may also include: cell, Bwp-Id, etc., which will not be elaborated here.

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.

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.

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.

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.

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.

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

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

Afterwards, the UE accesses the serving cell 1 via SSB1.

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

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.

The configuration signaling is the configuration signaling in the embodiment shown in Figure 2. In this scenario, when the network-side device configures the channel state information reference signal resource for the terminal, one channel state information reference signal resource includes the quasi-co-address information of multiple TRPs. In this way, the terminal performs channel measurement of the surrounding TRPs based on the channel state information reference signal resource.

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

Step 4: Based on the measurement results of multiple TRPs reported by the terminal, the base station determines whether the terminal should operate in Multi-TRP mode. The base station sends a command to the terminal, and the terminal operates in Multi-TRP mode accordingly.

In this process, the reference signal configuration method provided in this disclosure can be triggered based on step one or pre-configured before step two.

In summary, when a base station configures downlink channel state information (CSO) reference signal resources for a terminal, it configures one CSO reference signal resource for multiple TRPs. Furthermore, the configuration signaling for this downlink CSO reference signal resource indicates that it includes the quasi-co-address information of each TRP. Specifically, one CSO reference signal resource corresponding to each cooperating point is considered as the target resource. The number of antenna ports occupied by the target resource is related to the number of code division multiplexing (CDM) groups, and the antenna ports occupied by the target resource are divided according to a preset logical order. Thus, by combining the aggregation correspondence between the number of multiplexed antenna ports and the CDM groups, a comprehensive correspondence can be achieved between cooperating points, downlink CSO reference signals, CSO reference signal resources, QCL relationships, and antenna ports. Therefore, in multi-TRP scenarios, channel state measurement and feedback for multiple TRPs can be achieved through a single CSO reference signal resource. This reduces measurement latency and improves real-time performance, while also allowing for the reasonable reuse of quasi-co-address information to reduce feedback overhead. In summary, the technical solution provided in this disclosure can improve real-time performance and reduce feedback overhead, improve the performance of coherent transmission, and better ensure a consistent user experience.

In this disclosure, the quasi-co-address information of multiple TRPs carried in the configuration signaling can be configured in different ways. The following explanation uses CSI-RS as an example.

In one possible embodiment, the configuration signaling includes a plurality of transport configuration indication identifiers, wherein any one of the transport configuration indication identifiers is used to indicate quasi-co-address information of a cooperative point.

In the reference signal configuration scenario of the CSI-RS channel state information reference signal, the transmission configuration indication identifier 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-address information of a TRP. Specifically, when configuring NZP-CSI-RS-Resource, the higher-layer signaling qcl-InfoPeriodicCSI-RS can be set as a sequence of TCI-State Ids, which includes multiple TCI-State Ids, each of which is used to indicate the quasi-co-address information of a TRP.

For example, refer to Figure 5, which is a schematic diagram of the configuration signaling structure provided in this disclosure. As shown in red in Figure 5, when the base station configures the CSI-RS resource Config for different cooperative points for the terminal, it needs to configure NZP-CSI-RS-Resource. Specifically, during the configuration process, the higher-layer signaling qcl-InfoPeriodicCSI-RS in NZP-CSI-RS-Resource can be used to indicate the quasi-co-address information of the TRP, i.e., set to TCI-State Id. In this disclosure, qcl-InfoPeriodicCSI-RS is not set to a specific TCI-State Id value, but rather to a sequence of TCI-State Ids. This sequence of TCI-State Ids can be used to indicate the specific content of the TCI-State Ids for multiple TRPs. Thus, the quasi-co-address information of multiple cooperative points can be configured through a single CSI-RS resource (i.e., channel state information reference signal resource). Accordingly, multiple TRPs can have their channel quality measured by a single CSI-RS, and the quasi-co-location information of each TRP is associated with the resource configuration information of that CSI-RS.

For example, Figure 5 also shows the specific content of the TCI-State ID sequence: TCI-State ID 12 and TCI-State ID 13. These two TCI-State IDs correspond to two TRPs, specifically, to the CSI-RS signals of the two TRPs. For example, TCI-State ID 12 can be used to represent CSI-RS#12 corresponding to TRP1, that is, the CSI-RS signal identified as 12. Furthermore, Figure 5 further illustrates the specific content of TCI-State ID 12 and TCI-State ID 13 through the QCL-Info field.

As shown in the first QCL-Info field in Figure 5, for the TRP (denoted as TRP1) corresponding to TCI-State Id 12, the cell corresponding to TRP1 is ServCellIndex 1, i.e., serving cell 1. The reference signal with QCL relationship with CSI-RS#12 corresponding to this TRP1 is SSB-Index#0 (or denoted as SSB#0), i.e., the SSB signal with the identifier 0. The types of QCL relationship between the two reference signals (i.e., CSI-RS#12 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#12, based on the configuration information shown in Figure 5, when the UE receives CSI-RS#12, for the CSI-RS port related to TRP1, its Type A related large-scale channel information and the receiving beam direction are the same as SSB-Index#0.

Similarly, as shown in another QCL-Info field in Figure 5, for the TRP (denoted as TRP2) corresponding to TCI-State Id 13, the cell corresponding to TRP2 is ServCellIndex 1, i.e., serving cell 1. The reference signal with QCL relationship with CSI-RS#13 corresponding to this TRP2 is SSB-Index#1 (or denoted as SSB#1), i.e., the SSB signal with the identifier 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 the configuration information shown in Figure 5, when the UE receives CSI-RS#13, for the CSI-RS port related to TRP2, its Type B related large-scale channel information and received beam direction are the same as SSB-Index#1.

For ease of understanding, please refer to Figure 6, which is a logical schematic diagram of a configuration relationship provided in this disclosure. As shown in Figure 6, 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. Regarding the CSI-RS resource NZP-CSI-RS-Resource 12, in this disclosure, this CSI-RS resource corresponds to two TRPs, and the quasi-co-location information of each TRP is also indicated in the configuration signaling of this CSI-RS resource. Specifically, this CSI-RS resource corresponds to two TCI-State IDs, and each TCI-State ID is used to indicate the QCL relationship of a TRP. The specific indication content can be referred to the preceding text and will not be repeated here.

This disclosure also provides another possible configuration method.

In another possible embodiment, the configuration signaling includes a transport configuration indication identifier, which includes multiple quasi-co-location information fields, any one of which is used to indicate the quasi-co-location information of a cooperating point.

In the CSI-RS (Channel State Information Reference Signal) reference signal configuration scenario, the transmission configuration indication identifier can still specifically be the 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-address information fields), where any one QCL-Info field is used to indicate the quasi-co-address information of a TRP.

Specifically, when configuring NZP-CSI-RS-Resource, the higher-layer signaling qcl-InfoPeriodicCSI-RS can be set to a TCI-State Id value. When the TCI-State Id is used to indicate the quasi-co-address 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-address information of one TRP.

For example, refer to Figure 7, which is a schematic diagram of the configuration signaling structure provided in this disclosure. As shown in the red text of Figure 7, when the base station configures the CSI-RS resource Config for different cooperative points for the terminal, the higher-layer signaling qcl-InfoPeriodicCSI-RS in NZP-CSI-RS-Resource is set 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-address information of the two TRPs.

Specifically, as shown in the QCL-Info 1 field of Figure 7, for CSI-RS#13 corresponding to TCI-State Id 13, TRP1 is a 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 the configuration information shown in Figure 7, when the UE receives CSI-RS#13, for the CSI-RS port related to TRP1, its Type A related large-scale channel information and received beam direction are the same as SSB-Index#0.

Similarly, as shown in the QCL-Info 2 field of Figure 7, for CSI-RS#13 corresponding to TCI-State Id 13, the TRP is a cooperative point in ServCellIndex 2, and the reference signal with 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 the configuration information shown in Figure 7, when the UE receives CSI-RS#13, for the CSI-RS port related to TRP2, its Type B related large-scale channel information and received beam direction are the same as SSB-Index#1.

For ease of understanding, please refer to Figure 8, which is a logical schematic diagram of a configuration relationship provided in this disclosure. As shown in Figure 8, 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. Regarding the CSI-RS resource NZP-CSI-RS-Resource 12, in this disclosure, this CSI-RS resource corresponds to two TRPs, and the QCL information of each TRP is also indicated in the configuration signaling of this CSI-RS resource. Specifically, this CSI-RS resource corresponds to a TCI-State ID, which is used to indicate the QCL relationship between the two TRPs. The specific indication content can be found above and will not be repeated here.

In summary, this disclosure allocates a channel state information reference signal resource to multiple TRPs, and can specify the quasi-co-location information of each cooperative point in the channel state information reference signal resource through different configuration methods, so as to give full play to the actual role of the quasi-co-location information and enable the terminal to perform better channel estimation.

Based on any of the foregoing embodiments, this disclosure further provides configuration information between the TRP and the antenna port.

In one exemplary embodiment, the configuration information between the TRP and the antenna port can be synchronized or agreed upon between the base station and the terminal in the form of preset rules before the execution of this scheme, thus eliminating the need for repeated configuration each time. Alternatively, in another exemplary embodiment, the configuration information between the TRP and the antenna port can also be carried in the configuration signaling and sent in real time.

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

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

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

or,

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

Specifically, the logical order can be preset, and this disclosure does not limit the preset method. For example, ports can be divided in sequential or reverse order according to port identifiers, or they can be divided according to interval order. Take a scenario with 8 ports and 2 TRPs as an example. For instance, if divided according to port identifier order, the first 4 ports can be assigned to TRP1, and the last 4 ports to TRP2. Alternatively, ports can be divided by interval; then port1, port3, port5, and port7 can be assigned to TRP1, and port2, port4, port6, and port8 to TRP2. It should be understood that the examples here are merely illustrative and are not intended to limit the number of ports, the identifier method, or the division method.

There is a certain aggregation correspondence between the number of antenna port multiplexing and CDM groups. Based on this aggregation correspondence, it can be determined which antenna port corresponds to which CDM group. This aggregation correspondence can be found in the communication protocol and will not be elaborated here. Therefore, it is only necessary to determine the relationship between CDM groups and TRPs. In practical scenarios, the number of CDM groups (denoted as Q) and the number of TRPs (denoted as K) may be the same or different. Therefore, based on their numbers, the correspondence between them can be determined as follows, thereby determining the correspondence between TRPs and ports. In this way, a comprehensive correspondence between TRPs, CSI-RS, QCL, and ports can be achieved.

Specifically, when the number of CDM groups is equal to the number of TRPs, i.e. Q = K, the antenna ports occupied by a channel state information reference signal resource corresponding to a cooperative point correspond one-to-one with the antenna ports corresponding to the CDM group.

In one exemplary embodiment, the TRP number and CDM group number can be mapped one-to-one according to a preset logical order (e.g., sequential, reverse, etc.). Thus, the antenna port occupied by a channel state information reference signal resource corresponding to a TRP corresponds to the antenna port of the corresponding CDM group. Taking a scenario with 4 ports and 2 TRPs as an example, if the 4 ports correspond to 2 CDM groups, for example, port1 and port2 correspond to CDM group 1, and port3 and port4 correspond to CDM group 2, then the number of TRPs is equal to the number of CDM groups. In this case, TRP1 can be mapped to CDM group 1, and TRP2 to CDM group 2 according to the identification order. This determines the relationship with the antenna ports. Specifically, the antenna ports occupied by a channel state information reference signal resource corresponding to TRP1 are ports1 and 2 of CDM group 1, while the antenna ports occupied by a channel state information reference signal resource corresponding to TRP2 are ports3 and 4 of CDM group 2.

When the number of CDM groups is N times the number of TRPs, i.e. Q = N*K, the antenna port occupied by one channel state information reference signal resource corresponding to a TRP corresponds to the antenna ports of N CDM groups, where N is an integer greater than 1.

In one exemplary embodiment, the TRP number and CDM group number can be mapped one-to-N according to a preset logical order (e.g., sequential, reverse, etc.). Thus, the antenna port occupied by one channel state information reference signal resource corresponding to a TRP corresponds to the antenna ports of N CDM groups. Taking a scenario with 8 ports and 2 TRPs as an example, if the 8 ports correspond to 4 CDM groups (e.g., port1 and port2 correspond to CDM group 1, port3 and port4 to CDM group 2, port5 and port6 to CDM group 3, and port7 and port8 to CDM group 4), then the number of CDM groups is twice the number of TRPs. Therefore, one TRP (corresponding to one antenna port occupied by one channel state information reference signal resource) can correspond to 2 CDM groups (corresponding antenna ports). In this case, according to a preset logical order, such as the identification order, TRP1 can be mapped to CDM group 1 and CDM group 2, and TRP2 can be mapped to CDM group 3 and CDM group 4. This determines the relationship between TRPs and antenna ports. Specifically, the antenna ports occupied by a channel state information reference signal resource corresponding to TRP1 are port1, port2, port3, and port4 corresponding to CDM group 1 and CDM group 2, while the antenna ports occupied by a channel state information reference signal resource corresponding to TRP2 are port5, port6, port7, and port8 corresponding to CDM group 3 and CDM group 4.

Based on this, more specific quasi-co-address information can be obtained by combining the quasi-co-address information mentioned above. For example, when a terminal receives a channel state information reference signal, for port1 and port2 related to TRP1, part of the channel information of this channel state information reference signal is the same as the channel information of the reference signal indicated by the QCL relationship. Here, part of the channel information refers to the channel information indicated by the QCL type.

To further illustrate this solution, this disclosure also provides two embodiments for overall explanation.

Example 1: Using multiple TCI-State IDs to indicate the quasi-co-address information of multiple TRPs.

Taking the scenario shown in Figure 3 as an example, please also refer to Figures 5, 6 and 9. Figure 9 is a schematic diagram of the quasi-co-address information configuration of multiple TRPs in the CJT scenario provided in this disclosure.

As shown in Figures 3 and 9, TRP1 and TRP2 belong to the same serving cell. In practice, TRP1 and TRP2 can each call out two SSBs (SSB1 and SSB2) on different time-frequency resources. The UE accesses the serving cell Servingcell 1 through SSB1, while Servingcell 1 notifies the UE to measure the channel quality of other surrounding cells (e.g., measure RSRP).

Based on the situation shown in Figure 3, when the base station configures CSI-RS resources (i.e., Channel State Information Reference Signal Resources) for the terminal, it allocates the same CSI-RS resource to two TRPs and specifies the QCL relationship between the two TRPs through multiple TCI-State IDs. As shown in the embodiment in Figure 5 above, the base station can configure CSI-RS resource configurations for different cooperating points for the terminal. When configuring NZP-CSI-RS-Resource, the qcl-InfoPeriodicCSI-RS in the higher-layer signaling is set to indicate the TCI-State ID of multiple TRPs, that is, the quasi-co-location information of all cooperating points is indicated through one CSI-RS resource configuration. In this case, different TRPs are measured for channel quality by one CSI-RS, and the quasi-co-location information of each TRP is associated with the resource configuration information of that CSI-RS.

Based on this, the terminal uses the same CSI-RS resource to measure the channel information of multiple TRPs. Therefore, when the channel quality between two TRPs and the UE is measured using a single CSI-RS#12, according to the above configuration information, when the UE receives the CSI-RS, for the CSI-RS port related to TRP1, its Type A related large-scale channel information and receive beam direction are the same as SSB#0; for the CSI-RS port related to TRP2, its Type B related large-scale channel information is the same as SSB#1.

Furthermore, it is necessary to determine which ports of CSI-RS#12 correspond to TRP1 and which ports correspond to TRP2. At this point, we can first determine the aggregation correspondence between the number of antenna port multiplexing and CDM groups based on the communication protocol, and then determine the port corresponding to each TRP based on the relationship between the number of CDM groups and the number of TRPs.

For example, when the base station configures the terminal with CSI-RS#12 as ROW7 (i.e., the aggregation correspondence shown in row 7 of Table 7.4.1.5.3-1 of the communication protocol), 8 ports, and CDM Type fd-CDM2, there are a total of 4 CDM groups. According to this setting, CDM group 0 (or denoted as CDM0) corresponds to ports 3000 and 3001, CDM1 corresponds to ports 3002 and 3003, CDM2 corresponds to ports 3004 and 3005, and CDM3 corresponds to ports 3006 and 3007. Based on this, the number of CDM groups is twice the number of TRPs. Therefore, based on the identification order, TRP1 is mapped to CDM0 and CDM1, and TRP2 is mapped to CDM2 and CDM3. Therefore, the correspondence between TRP and port can be determined: the antenna ports occupied by a channel state information reference signal resource corresponding to TRP1 are: port3000, port3001, port3002, and port3003; while the antenna ports occupied by a channel state information reference signal resource corresponding to TRP2 are: port3004, port3005, port3006, and port3007.

Based on the above information, when the terminal receives CSI-RS#12, for ports 3000, 3001, 3002, and 3003 related to TRP1, the large-scale channel information and receiving beam direction related to Type A are the same as those of SSB#0. However, for ports 3004, 3005, 3006, and 3007 related to TRP2, the large-scale channel information related to Type B is the same as those of SSB#1.

The terminal can provide CSI-RS channel information feedback based on the aforementioned quasi-co-location information. Therefore, the base station can determine whether to notify the terminal to enter Multi-TRP mode based on this channel information reported by the terminal. Accordingly, if the terminal receives a notification from the base station instructing it to enter Multi-TRP mode, the terminal enters Multi-TRP mode.

Example 2: Use multiple QCL-Info fields in a single TCI-State ID to indicate the quasi-co-address information of multiple TRPs.

Taking the scenario shown in Figure 4 as an example, please also refer to Figures 7, 8 and 10. Figure 10 is a schematic diagram of another type of quasi-co-address information configuration for multiple TRPs in the CJT scenario provided in this disclosure.

As shown in Figures 4 and 10, TRP1 and TRP2 belong to different serving cells. In specific implementation, TRP1 and TRP2 can each broadcast two SSBs (SSB1 and SSB2) on different time-frequency resources. The UE accesses the primary serving cell Serving cell 1 through SSB1, while Serving cell 1 notifies the UE to measure the channel quality of other surrounding cells (e.g., RSRP, small-scale information, etc.).

Based on the scenario shown in Figure 4, when the base station configures CSI-RS resources (i.e., Channel State Information Reference Signal Resources) for the terminal, it allocates the same CSI-RS resource to two TRPs, and specifies the QCL relationship between the two TRPs through multiple QCL-Info fields in a single TCI-State ID. As shown in the embodiment in Figure 6 above, the base station can configure CSI-RS resource Config for different cooperating points for the terminal. When configuring NZP-CSI-RS-Resource, it sets qcl-InfoPeriodicCSI-RS in the higher-layer signaling to a single TCI-state ID, and configures multiple QCL-Info fields in this TCI-state ID. Each QCL-Info field is used to indicate the quasi-co-address information of a cooperating point. In this case, the primary cell (Serving cell 1) can notify the UE of the quasi-co-address information of the port associated with each cooperating point.

Based on this, the terminal uses the same CSI-RS resource to measure the channel information of multiple TRPs. Therefore, when the channel quality between two TRPs and the UE is measured using a single CSI-RS#13, according to the above configuration information, when the UE receives the CSI-RS, for the CSI-RS port related to TRP1, its Type A related large-scale channel information and receive beam direction are the same as SSB#0; for the CSI-RS port related to TRP2, its Type B related large-scale channel information is the same as SSB#1.

Furthermore, it is necessary to determine which ports of CSI-RS#13 belong to TRP1 and which ports belong to TRP2. At this point, we can first determine the aggregation correspondence between the number of antenna port multiplexing and CDM groups based on the communication protocol, and then determine the port corresponding to each TRP based on the relationship between the number of CDM groups and the number of TRPs.

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

Based on the above information, when the terminal receives CSI-RS#13, for ports 3000 and 3001 related to TRP1, the large-scale channel information and receiving beam direction related to Type A are the same as those of SSB#0, while for ports 3002 and 3003 related to TRP2, the large-scale channel information related to Type B is the same as those of SSB#1.

The terminal can provide CSI-RS channel information feedback based on the aforementioned quasi-co-location information. Therefore, the base station can determine whether to notify the terminal to enter Multi-TRP mode based on this channel information reported by the terminal. Accordingly, if the terminal receives a notification from the base station instructing it to enter Multi-TRP mode, the terminal enters Multi-TRP mode.

This disclosure also provides a reference signal configuration method. This method is applied to a terminal. Please refer to Figure 11, which is a flowchart illustrating another reference signal configuration method provided in an embodiment of this disclosure. As shown in Figure 11, the method includes:

S1102, Receive configuration signaling for downlink channel state information reference signal resources from the base station. The configuration signaling is used to indicate that a channel state information reference signal resource includes quasi-co-location information of each cooperating point.

S1104, based on configuration signaling, measures the channel state information of each cooperating point;

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 a channel state information reference signal resource corresponding to each cooperative point.

The terminal-side method is the opposite of the base station-side method. For relevant information, please refer to the previous text, which will not be repeated here.

This disclosure also provides a reference signal configuration device, which can be configured or integrated in a base station. Figure 12 is a structural block diagram of a reference signal configuration device provided in an embodiment of this disclosure. As shown in Figure 12, the reference signal configuration device 1200 includes:

The determining unit 1210 is used to determine the configuration signaling of the downlink channel state information reference signal resource, wherein the configuration signaling is used to indicate that the channel state information reference signal resource includes quasi-co-address information of each cooperating point;

Transceiver unit 1220 is used to send the configuration signaling to the terminal;

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 a channel state information reference signal resource corresponding to each cooperative point.

In one exemplary embodiment, the quasi-co-location information of any cooperating point includes: a reference signal identifier with a quasi-co-location relationship and a quasi-co-location relationship type.

In one exemplary embodiment, the configuration signaling includes multiple transmission configuration indication identifiers, any one of which is used to indicate quasi-co-address information of a cooperating point.

In one exemplary embodiment, the configuration signaling includes a transmission configuration indication identifier, which includes multiple quasi-co-location information fields, any one of which is used to indicate the quasi-co-location information of a cooperating point.

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

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

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

This disclosure also provides a reference signal configuration device, which can be configured or integrated in a terminal. Figure 13 is a structural block diagram of another reference signal configuration device provided in an embodiment of this disclosure. As shown in Figure 13, the reference signal configuration device 1300 includes:

The transceiver unit 1310 is used to receive configuration signaling from the base station for downlink channel state information reference signal resources, wherein the configuration signaling is used to indicate that a channel state information reference signal resource includes quasi-co-location information of each cooperating point;

Processing unit 1320 is used to measure the channel state information of each cooperating 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; and the target resource is a channel state information reference signal resource corresponding to each cooperative point.

In one exemplary embodiment, the quasi-co-location information of any cooperating point includes: a reference signal identifier with a quasi-co-location relationship and a quasi-co-location relationship type.

In one exemplary embodiment, the configuration signaling includes a plurality of transport configuration indication identifiers; any one of the transport configuration indication identifiers is used to indicate quasi-co-address information of a cooperating point.

In one exemplary embodiment, the configuration signaling includes a transmission configuration indication identifier, which includes multiple quasi-co-location information fields, any one of which is used to indicate the quasi-co-location information of a cooperating point.

In one exemplary embodiment, the number of antenna ports occupied by the target resource is related to the number of code division multiplexing (CDM) groups, including:

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

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

Figure 14 is a hardware block diagram of an electronic device provided in an embodiment of this disclosure. The electronic device 1400 according to an embodiment of this disclosure includes at least a processor and a memory for storing computer-readable instructions. When the computer-readable instructions are loaded and executed by the processor, the processor performs the reference signal configuration method described in any of the preceding embodiments of this disclosure.

The electronic device 1400 shown in Figure 14 specifically includes a central processing unit (CPU) 1401, a graphics processing unit (GPU) 1402, and a memory 1403. These units are interconnected via a bus 1404. The CPU 1401 and/or GPU 1402 can function as the aforementioned processor, and the memory 1403 can function as the aforementioned memory for storing computer-readable instructions. Furthermore, the electronic device 1400 may also include a communication unit 1405, a storage unit 1406, an output unit 1407, an input unit 1408, and an external device 1409, all of which are also connected to the bus 1404.

Figure 15 is a schematic diagram of a computer-readable storage medium provided in an embodiment of the present disclosure. As shown in Figure 15, the computer-readable storage medium 1500 according to an embodiment of the present disclosure stores computer-readable instructions 1501 thereon. When the computer-readable instructions 1501 are executed by a processor, the reference signal configuration method described with reference to the above figures according to any embodiment of the present disclosure is performed. The computer-readable storage medium includes, but is not limited to, volatile memory and/or non-volatile memory. Volatile memory may include, for example, random access memory (RAM) and/or cache memory. Non-volatile memory may include, for example, read-only memory (ROM), hard disk, flash memory, optical disk, magnetic disk, etc.

This disclosure further provides a computer program product, including a computer program that, when executed by a processor, implements the reference signal configuration method described in any of the preceding embodiments of this disclosure.

Those skilled in the art will recognize that the units and algorithm steps of the various 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 these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those 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 this disclosure.

The basic principles of this disclosure have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this disclosure are merely examples and not limitations, and should not be considered as essential features of each embodiment of this disclosure. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the scope of this disclosure to the necessity of employing the aforementioned specific details for implementation.

The block diagrams of devices, apparatuses, devices, and systems disclosed herein are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and/or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

Additionally, as used herein, the “or” used in a list of items beginning with “at least one” indicates a separate list, such that a list of, for example, “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 word “exemplary” does not imply that the described example is preferred or better than other examples.

It should also be noted that in the systems and methods of this disclosure, the components or steps can be decomposed and/or recombined. These decompositions and/or recombinations should be considered as equivalent solutions to this disclosure.

Various changes, substitutions, and modifications can be made to the technology described herein without departing from the teachings defined by the appended claims. Furthermore, the scope of the claims of this disclosure is not limited to the specific aspects of the processes, machines, manufactures, events, means, methods, and actions described above. Currently existing or later-developed processes, machines, manufactures, events, means, methods, or actions that perform substantially the same function or achieve substantially the same result as the corresponding aspects described herein can be utilized. Therefore, the appended claims include such processes, machines, manufactures, events, means, methods, or actions within their scope.

The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this disclosure. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of this disclosure. Therefore, this disclosure is not intended to be limited to the aspects shown herein, but rather to be carried out within the widest scope consistent with the principles and novel features disclosed herein.

The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this disclosure to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations therein.

Claims (11)

1. A method of reference signal configuration, the method comprising:

determining configuration signaling of downlink channel state information reference signal resources, wherein the configuration signaling is used for indicating that one channel state information reference signal resource comprises quasi co-location information of each cooperative point;

sending the configuration signaling to a terminal;

The method comprises the steps of determining the number of antenna ports occupied by target resources, wherein the number of the antenna ports occupied by the target resources 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, and the target resources are channel state information reference signal resources corresponding to each cooperative point.

2. The method of claim 1, wherein the quasi co-location information of any one of the cooperating points includes a quasi co-location relationship type and a quasi co-location relationship type.

3. The method of claim 2, wherein the configuration signaling comprises a plurality of transmission configuration indication identities;

Any one of the transmission configuration indication identifiers is used for indicating quasi co-location information of one of the cooperative points.

4. The method of claim 2, wherein the configuration signaling includes a transmission configuration indication identifier, the transmission configuration indication identifier including a plurality of quasi co-sited information fields, any one of the quasi co-sited information fields being used to indicate quasi co-sited information of a cooperating point.

5. The method according to any of claims 1-4, wherein 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 the code division multiplexing groups is equal to the number of the cooperative points, the antenna ports occupied by the target resources are in one-to-one correspondence with the antenna ports corresponding to the code division multiplexing groups;

when the number of the code division multiplexing groups is N times of the number of the cooperative points, the antenna ports occupied by the target resources correspond to the antenna ports corresponding to the N groups of code division multiplexing groups, and N is an integer larger than 1.

6. A method of reference signal configuration, the method comprising:

receiving configuration signaling of downlink channel state information reference signal resources from a base station, wherein the configuration signaling is used for indicating that one channel state information reference signal resource comprises quasi co-location information of each cooperative point;

based on the configuration signaling, measuring channel state information of each cooperative point;

The method comprises the steps of determining the number of antenna ports occupied by target resources, wherein the number of the antenna ports occupied by the target resources 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, and the target resources are channel state information reference signal resources corresponding to each cooperative point.

7. A reference signal configuration apparatus, the apparatus comprising:

A determining unit, configured to determine a configuration signaling of a downlink channel state information reference signal resource, where the configuration signaling is configured to indicate that one channel state information reference signal resource includes quasi co-location information of each cooperative point;

The receiving and transmitting unit is used for transmitting the configuration signaling to the terminal;

The method comprises the steps of determining the number of antenna ports occupied by target resources, wherein the number of the antenna ports occupied by the target resources 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, and the target resources are channel state information reference signal resources corresponding to each cooperative point.

8. A reference signal configuration apparatus, the apparatus comprising:

the receiving and transmitting unit is used for receiving configuration signaling of downlink channel state information reference signal resources from the base station, wherein the configuration signaling is used for indicating that one channel state information reference signal resource comprises quasi co-location information of each cooperative point;

The processing unit is used for measuring the channel state information of each cooperative point based on the configuration signaling;

The method comprises the steps of determining the number of antenna ports occupied by target resources, wherein the number of the antenna ports occupied by the target resources 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, and the target resources are channel state information reference signal resources corresponding to each cooperative point.

9. An electronic device, comprising:

A memory for storing computer readable instructions, and

A processor for executing the computer readable instructions to cause the electronic device to perform the method of any of claims 1-6.

10. A non-transitory computer readable storage medium storing computer readable instructions which, when executed by a processor, cause the processor to perform the method of any of claims 1-6.

11. A computer program product comprising a computer program which, when executed by a processor, implements the method according to any of claims 1-6.