CSI-RS (Channel State Information-Reference Signal) transmission method, device and equipment

Abstract

The invention provides a CSI-RS (Channel State Information-Reference Signal) transmission method, device and equipment. The method comprises the following steps: receiving resource configuration information corresponding to a CSI-RS resource set sent by a base station; wherein the resource configuration information is used for indicating a CSI-RS resource set, and the CSI-RS resource set comprises a CSI-RS resource located at an SBFD symbol; wherein the CSI-RS resource exceeds the range of a downlink sub-band of the SBFD symbol, or the CSI-RS resource is located in the downlink sub-band of the SBFD symbol; and receiving the CSI-RS sent by the base station based on the CSI-RS resources in the CSI-RS resource set, measuring the received CSI-RS, and reporting a measurement result to the base station. According to the scheme, the resource utilization rate can be increased.

Description

CSI-RS transmission method, device and equipment Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a CSI-RS transmission method, apparatus, and device. Background Art

[0002] The TDD (Time Division Duplex) system is widely used in mobile communication systems, such as the 5G system. In the TDD system, the frame structure is divided into DL (Downlink) time slots, UL (Uplink) time slots, and flexible time slots.

[0003] A DL time slot includes multiple DL symbols, and downlink data is processed in the frequency domain resources corresponding to these DL symbols. A UL time slot includes multiple UL symbols, and uplink data is processed in the frequency domain resources corresponding to these UL symbols. A flexible time slot includes at least one F (Flexible) symbol. The F symbol can be used for DL, i.e., downlink data is processed in the frequency domain resources corresponding to the F symbol. The F symbol can also be used for UL, i.e., uplink data is processed in the frequency domain resources corresponding to the F symbol. The F symbol can also be used for a GP (Guard Period), i.e., the frequency domain resources corresponding to the F symbol are used to protect uplink and downlink switching.

[0004] The TDD system can operate in HD (Half Duplex) mode, that is, at the same time, the same frequency domain resources can only be used for UL or DL.

[0005] Summary of the Invention

[0006] The present application provides a CSI-RS transmission method, applied to a user equipment, including:

[0007] receiving resource configuration information corresponding to a CSI-RS resource set sent by a base station, where the resource configuration information is used to indicate a CSI-RS resource set, and the CSI-RS resource set includes a CSI-RS resource located in a SBFD symbol; the CSI-RS resource exceeds a range of a downlink subband of the SBFD symbol, or the CSI-RS resource is located in a downlink subband of the SBFD symbol;

[0008] The CSI-RS sent by the base station is received based on the CSI-RS resources in the CSI-RS resource set.

[0009] The present application provides a CSI-RS transmission method, which is applied to a base station, including:

[0010] Sending resource configuration information corresponding to a CSI-RS resource set to a user equipment, where the resource configuration information is used to indicate a CSI-RS resource set used by the user equipment, and the CSI-RS resource set includes a CSI-RS resource located in a SBFD symbol; the CSI-RS resource is beyond the range of a downlink subband of the SBFD symbol, or the CSI-RS resource is located in the downlink subband of the SBFD symbol;

[0011] A CSI-RS is sent to the user equipment based on the CSI-RS resources in the CSI-RS resource set, so that the user equipment receives the CSI-RS based on the CSI-RS resources in the CSI-RS resource set.

[0012] The present application provides a CSI-RS transmission device, applied to a user equipment, including:

[0013] A first receiving module is configured to receive resource configuration information corresponding to a CSI-RS resource set sent by a base station, where the resource configuration information is used to indicate a CSI-RS resource set, and the CSI-RS resource set includes a CSI-RS resource located in a SBFD symbol; the CSI-RS resource exceeds a range of a downlink subband of the SBFD symbol, or the CSI-RS resource is located in a downlink subband of the SBFD symbol;

[0014] The second receiving module is configured to receive a CSI-RS sent by a base station based on the CSI-RS resources in the CSI-RS resource set.

[0015] The present application provides a CSI-RS transmission device, applied to a base station, including:

[0016] A first sending module is configured to send resource configuration information corresponding to a CSI-RS resource set to a user equipment, where the resource configuration information is used to indicate a CSI-RS resource set used by the user equipment, and the CSI-RS resource set includes a CSI-RS resource located in a SBFD symbol; the CSI-RS resource is beyond the range of a downlink subband of the SBFD symbol, or the CSI-RS resource is located in a downlink subband of the SBFD symbol;

[0017] The second sending module is configured to send a CSI-RS to the user equipment based on the CSI-RS resources in the CSI-RS resource set, so that the user equipment receives the CSI-RS based on the CSI-RS resources in the CSI-RS resource set.

[0018] The present application provides a user equipment, including: a processor and a machine-readable storage medium, wherein the machine-readable storage medium stores machine-executable instructions that can be executed by the processor; the processor is used to execute the machine-executable instructions to implement the CSI-RS transmission method of the above example.

[0019] The present application provides a base station, comprising: a processor and a machine-readable storage medium, wherein the machine-readable storage medium stores machine-executable instructions that can be executed by the processor; the processor is configured to execute the machine-executable instructions to implement the CSI-RS transmission method of the above example.

[0020] It can be seen from the above technical solution that the UE (User Equipment) uses the CSI-RS resources in the CSI-RS (Channel State Information Reference Signal) resource set to receive CSI-RS, and the base station uses the CSI-RS resources in the CSI-RS resource set to send CSI-RS. When the SBFD (Sub-Band Full Duplex) time-frequency resources overlap with the CSI-RS resources, the SBFD time-frequency resources can be used for CSI-RS transmission, thereby improving the transmission reliability and cell coverage radius of downlink data, reducing the uplink and downlink interference caused by the SBFD time-frequency resources, and enabling the SBFD time-frequency resource configuration and CSI-RS transmission mechanism to be effectively combined and implemented. From the perspective of the entire system, it can support CSI-RS transmission of the TDD system, improve resource utilization, and improve network coverage and network capacity, increase downlink transmission resources, reduce downlink transmission delay, and increase downlink transmission capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG1A and FIG1B are schematic diagrams of a CSI-RS transmission method in an example;

[0022] FIG2 is a schematic diagram of SBFD time-frequency resources in an example;

[0023] FIG3 is a schematic diagram of an example of configuring a CSI-RS resource set with SBFD symbols and normal symbols;

[0024] FIG4 is a schematic diagram of an example in which a CSI subband and a UL subband are not aligned;

[0025] FIG5 is a schematic diagram of an example of configuring a CSI-RS resource set with SBFD symbols;

[0026] FIG6A and FIG6B are schematic structural diagrams of a CSI-RS transmission apparatus in an example;

[0027] FIG7A is a schematic structural diagram of a user equipment in an example;

[0028] FIG7B is a schematic diagram of the structure of a base station in an example. DETAILED DESCRIPTION

[0029] The terms used in the embodiments of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The singular forms "a," "the," and "the" used in this application and claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to any or all possible combinations of one or more associated listed items.

[0030] It should be understood that although the terms first, second, third, etc. may be used to describe various information in the embodiments of the present application, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" used may also be interpreted as "at the time of" or "when" or "in response to determining".

[0031] TDD systems can operate in HD mode, meaning that at the same time, the same frequency domain resources can only be used for UL or DL. To make more flexible use of frequency domain resources and improve resource utilization, TDD systems can also operate in FD (Full-Duplex) mode, meaning that at the same time, the same frequency domain resources are used for both UL and DL, that is, uplink and downlink data are processed simultaneously on the same frequency domain resources.

[0032] In a TDD system, the frame structure is divided into DL time slots, UL time slots, and flexible time slots. Once the frame structure is determined, the UE can transmit and receive data according to the frame structure. For UEs using HD (Half Duplex) mode, the base station (such as a gNB) schedules the UE to transmit or receive according to the frame structure. For UEs using FD mode, the base station schedules the UE to transmit, receive, or both according to the frame structure. In summary, the base station can configure the frame structure and notify the UE of the frame structure so that the UE understands the frame structure and can correctly transmit and receive data. Furthermore, after understanding the frame structure, the UE can be aware of potential inter-UE interference and use interference cancellation techniques to mitigate interference and improve communication reliability.

[0033] For example, in a TDD system, for a frame structure that is primarily used for uplink transmission, more UL time slots are usually configured. This results in fewer DL time slots, which in turn limits the downlink transmission rate and increases the transmission delay of downlink data, resulting in a longer downlink transmission delay and the non-utilization of downlink services.

[0034] In one example of the present application, a CSI-RS transmission method is proposed, which configures flexible downlink frequency domain resources and uplink frequency domain resources for UEs through SBFD time-frequency resources, and can transmit uplink data in the uplink frequency domain resources, that is, it can use downlink time slots or flexible time slots to configure uplink frequency domain resources, and transmit uplink data through the uplink frequency domain resources, thereby improving the uplink transmission rate and reducing the transmission delay of uplink data. In addition, it is also possible to use uplink time slots or flexible time slots to configure downlink frequency domain resources, and transmit downlink data through the downlink frequency domain resources, thereby improving the downlink transmission rate and reducing the transmission delay of downlink data.

[0035] In one example of the present application, a CSI-RS transmission method is proposed. The method can be applied to a user equipment. FIG1A is a flow chart of the CSI-RS transmission method. The method may include:

[0036] Step 111: Receive resource configuration information corresponding to the CSI-RS resource set sent by the base station; wherein the resource configuration information is used to indicate the CSI-RS resource set, and the CSI-RS resource set includes a CSI-RS resource located in the SBFD symbol; wherein the CSI-RS resource may exceed the range of the downlink subband of the SBFD symbol, or the CSI-RS resource may be located in the downlink subband of the SBFD symbol.

[0037] Step 112: Receive the CSI-RS sent by the base station based on the CSI-RS resources in the CSI-RS resource set.

[0038] In an example of the present application, a CSI-RS transmission method is proposed. The method can be applied to a base station. FIG1B is a flow chart of the CSI-RS transmission method. The method may include:

[0039] Step 121: Send resource configuration information corresponding to the CSI-RS resource set to the user equipment, where the resource configuration information is used to indicate the CSI-RS resource set used by the user equipment, and the CSI-RS resource set includes a CSI-RS resource located in the SBFD symbol; wherein the CSI-RS resource exceeds the range of the downlink subband of the SBFD symbol, or the CSI-RS resource is located in the downlink subband of the SBFD symbol.

[0040] Step 122: Send a CSI-RS to the user equipment based on the CSI-RS resources in the CSI-RS resource set, so that the user equipment receives the CSI-RS based on the CSI-RS resources in the CSI-RS resource set.

[0041] In an example, the CSI-RS resource is a CSI-RS time-frequency resource, and the CSI-RS resource is used as an example in the following.

[0042] In an example, if the user equipment corresponds to the first CSI-RS resource set, the base station sends first resource configuration information corresponding to the first CSI-RS resource set to the user equipment, and the first resource configuration information is used to indicate the first CSI-RS resource set. The first CSI-RS resource set may include a first type of CSI-RS resource located in a normal symbol and a second type of CSI-RS resource located in a SBFD symbol, and the second type of CSI-RS resource exceeds the range of the downlink subband of the SBFD symbol. The second type of CSI-RS resource exceeds the range of the downlink subband of the SBFD symbol, which means that the second type of CSI-RS resource includes the first part of the resources located in the downlink subband of the SBFD symbol and the second part of the resources located in the uplink subband or protection subband of the SBFD symbol.

[0043] In one example, if the user equipment corresponds to the second CSI-RS resource set and the third CSI-RS resource set, the base station sends second resource configuration information corresponding to the second CSI-RS resource set and third resource configuration information corresponding to the third CSI-RS resource set to the user equipment. The second resource configuration information is used to indicate the second CSI-RS resource set, and the third resource configuration information is used to indicate the third CSI-RS resource set. The second CSI-RS resource set includes a third type of CSI-RS resource located in a SBFD symbol. The third type of CSI-RS resource is located in the downlink subband of the SBFD symbol, that is, the third type of CSI-RS resource does not exceed the range of the downlink subband of the SBFD symbol. The third CSI-RS resource set includes a fourth type of CSI-RS resource located in a normal symbol.

[0044] In an example, if the second type of CSI-RS resources includes the first part of resources located in the downlink subband of the SBFD symbol and the second part of resources located in the uplink subband or the protection subband of the SBFD symbol, then: if downlink data transmission outside the downlink subband of the SBFD symbol is allowed, the base station sends CSI-RS to the user equipment based on the first part of resources and the second part of resources of the second type of CSI-RS resources. The user equipment receives the CSI-RS sent by the base station based on the first part of resources and the second part of resources of the second type of CSI-RS resources. Or,

[0045] If downlink data transmission outside the downlink subband of the SBFD symbol is not allowed, the base station prohibits sending CSI-RS to the user equipment based on the first part of the resources and the second part of the resources of the second type of CSI-RS resources. The user equipment prohibits receiving the CSI-RS sent by the base station based on the first part of the resources and the second part of the resources of the second type of CSI-RS resources. Alternatively, the base station sends CSI-RS based on the first part of the resources of the second type of CSI-RS resources and prohibits sending CSI-RS based on the second part of the resources of the second type of CSI-RS resources. The user equipment receives CSI-RS based on the first part of the resources of the second type of CSI-RS resources and prohibits receiving CSI-RS based on the second part of the resources of the second type of CSI-RS resources.

[0046] In an example, after receiving CSI-RS based on the first part of the second type of CSI-RS resources and prohibiting the reception of CSI-RS based on the second part of the second type of CSI-RS resources, the user equipment can also measure the CSI-RS received from the first part of the second type of CSI-RS resources to obtain first channel state information, and send the first channel state information to the base station.

[0047] In one example, after the user equipment prohibits receiving CSI-RS based on the first part of resources and the second part of resources of the second type of CSI-RS resources, it can also perform measurement based on the CSI-RS that does not overlap with the uplink subband or the protection subband in the previous period, determine the measurement result as the channel state information of the current period, and send the channel state information to the base station.

[0048] In one example, after the user equipment receives the CSI-RS sent by the base station based on the first type of CSI-RS resources in the first CSI-RS resource set, it can also measure the CSI-RS received by the first type of CSI-RS resources to obtain second channel state information, and send the second channel state information to the base station.

[0049] The sending of the first channel state information and the sending of the second channel state information to the base station includes: if the first channel state information includes multiple first L1-RSRPs and the second channel state information includes multiple second L1-RSRPs, selecting N first L1-RSRPs from the multiple first L1-RSRPs and selecting N second L1-RSRPs from the multiple second L1-RSRPs, and sending the N first L1-RSRPs and the N second L1-RSRPs to the base station; or selecting 2N L1-RSRPs from the multiple first L1-RSRPs and the multiple second L1-RSRPs, and sending the 2N L1-RSRPs to the base station. And / or,

[0050] If the first channel state information includes multiple first L1-SINRs, and the second channel state information includes multiple second L1-SINRs, N first L1-SINRs are selected from the multiple first L1-SINRs, and N second L1-SINRs are selected from the multiple second L1-SINRs, and the N first L1-SINRs and the N second L1-SINRs are sent to the base station; alternatively, 2N L1-SINRs are selected from the multiple first L1-SINRs and the multiple second L1-SINRs, and the 2N L1-SINRs are sent to the base station.

[0051] In an example, the user equipment measures the CSI-RS received by the first part of the second type of CSI-RS resources to obtain the first channel state information, which may include: if the first part of the second type of CSI-RS resources corresponds to at least one CSI subband, for each CSI subband, if the CSI subband completely overlaps with the uplink subband or protection subband of the SBFD symbol, prohibiting the measurement of the CSI-RS received by the CSI subband.

[0052] If the CSI subband does not overlap with the uplink subband or guard subband of the SBFD symbol, the CSI-RS received in the CSI subband is measured to obtain a measurement result of the CSI subband.

[0053] If the CSI subband partially overlaps with the uplink subband or guard subband of the SBFD symbol, measurement of the CSI-RS received on the CSI subband is prohibited. Alternatively, whether to measure the CSI-RS received on the CSI subband is determined based on the size of the non-overlapping resources of the CSI subband. If so, measure the CSI-RS received on the CSI subband to obtain the measurement result of the CSI subband. If not, measurement of the CSI-RS received on the CSI subband is prohibited.

[0054] First channel state information is determined based on the measurement result of each CSI subband.

[0055] In an example, the base station may send first indication information to the user equipment, and the user equipment receives the first indication information. The first indication information is used to indicate prohibiting transmission of CSI-RS based on the first part and the second part of the second type of CSI-RS resources, or to indicate transmission of CSI-RS based on the first part of the second type of CSI-RS resources and prohibiting transmission of CSI-RS based on the second part of the second type of CSI-RS resources.

[0056] If the first indication information is used to indicate that CSI-RS transmission is to be performed based on a first portion of resources of a second type of CSI-RS resources, and to prohibit CSI-RS transmission based on a second portion of resources of the second type of CSI-RS resources, the base station may further send second indication information to the user equipment, which is received by the user equipment. The second indication information is used to indicate that measurement of CSI-RS received in a CSI subband that overlaps with an uplink subband or a guard subband is to be prohibited, or to indicate whether to measure CSI-RS received in a CSI subband based on the size of non-overlapping resources of the CSI subband.

[0057] In one example, after the user equipment receives the CSI-RS sent by the base station based on the first type of CSI-RS resources, it can also measure the CSI-RS received by the first type of CSI-RS resources to obtain second channel state information, and send the second channel state information to the base station; wherein the first channel state information and the second channel state information are sent to the base station through different uplink resources; or, the first channel state information and the second channel state information are sent to the base station through the same uplink resource.

[0058] In one example, for the base station and user equipment, the third type of CSI-RS resources only include resources located in the downlink subband of the SBFD symbol; wherein: if the third type of CSI-RS resources only occupy continuous resources of the downlink subband, the second resource configuration information includes the RB starting position and the number of RBs occupied corresponding to the continuous resources; if the third type of CSI-RS resources occupy two non-contiguous resources of the downlink subband, the second resource configuration information includes the RB starting position and the number of RBs occupied corresponding to the two resources respectively.

[0059] Among them, the starting position of the RB corresponding to the third type of CSI-RS resources can be an integer multiple of the first value (such as 4), and the number of RBs occupied corresponding to the third type of CSI-RS resources can be greater than or equal to the second value (such as 24), and the number of RBs occupied corresponding to the third type of CSI-RS resources can be an integer multiple of the first value.

[0060] Alternatively, the starting position of the RB corresponding to the third type of CSI-RS resources is the starting position of the downlink subband of the SBFD symbol, and the number of RBs occupied by the third type of CSI-RS resources is an arbitrary value.

[0061] Among them, if the capability parameter of the user equipment indicates that it has the ability to support any RB starting position, the RB starting position corresponding to the third type of CSI-RS resource is the starting position of the downlink subband of the SBFD symbol, and the number of RBs occupied corresponding to the third type of CSI-RS resource is an arbitrary value; if the capability parameter of the user equipment indicates that it does not have the ability to support any RB starting position, the RB starting position corresponding to the third type of CSI-RS resource is an integer multiple of the first value, and the number of RBs occupied corresponding to the third type of CSI-RS resource is greater than or equal to the second value, and the number of RBs occupied corresponding to the third type of CSI-RS resource is an integer multiple of the first value.

[0062] In one example, the base station may send third indication information to the user equipment, and the user equipment may receive the third indication information, wherein the third indication information is used to indicate that downlink data transmission outside the downlink subband of the SBFD symbol is permitted, or is used to indicate that downlink data transmission outside the downlink subband of the SBFD symbol is not permitted.

[0063] And / or, the base station may send fourth indication information to the user equipment, and the user equipment may receive the fourth indication information. The fourth indication information is used to indicate that uplink data transmission outside the uplink subband of the SBFD symbol is allowed, or is used to indicate that uplink data transmission outside the uplink subband of the SBFD symbol is not allowed.

[0064] The base station sends the CSI-RS based on the first part of the resources of the second type of CSI-RS resources, and prohibits sending the CSI-RS based on the second part of the resources of the second type of CSI-RS resources. The method may include: determining the target transmit power based on the maximum transmit power of the second type of CSI-RS resources; or determining the target transmit power based on the maximum transmit power and the resource ratio of the second type of CSI-RS resources, where the resource ratio is the resource ratio of the first part of the resources to the second type of CSI-RS resources; and sending the CSI-RS based on the first part of the resources at the target transmit power.

[0065] As can be seen from the above technical solution, the UE uses the CSI-RS resources in the CSI-RS resource set to receive CSI-RS, and the base station uses the CSI-RS resources in the CSI-RS resource set to send CSI-RS. When the SBFD time-frequency resources overlap with the CSI-RS resources, the SBFD time-frequency resources are used for CSI-RS transmission, thereby improving the transmission reliability and cell coverage radius of downlink data, reducing the uplink and downlink interference caused by the SBFD time-frequency resources, and enabling the SBFD time-frequency resource configuration and CSI-RS transmission mechanism to be effectively combined and implemented. From the perspective of the entire system, it can support CSI-RS transmission of the TDD system, improve resource utilization, improve network coverage and network capacity, increase downlink transmission resources, reduce downlink transmission delay, and increase downlink transmission capacity.

[0066] The above technical solution of the present application is described below with reference to examples.

[0067] In a TDD system, the frame structure can be divided into UL time slots, DL time slots, and flexible time slots according to time slots. The symbols in the flexible time slots can be configured as UL symbols, DL symbols, and F symbols. F symbols can be used for UL, DL, or GP. Among them, uplink data can be transmitted in the UL time slot, UL symbols in the flexible time slot, or F symbols. Uplink data cannot be transmitted in the DL time slot or the DL symbols in the flexible time slot. Similarly, downlink data can be transmitted in the DL time slot, DL symbols in the flexible time slot, or F symbols. Downlink data cannot be transmitted in the UL time slot or the UL symbols in the flexible time slot.

[0068] Full-duplex communication can be achieved through SBFD, that is, SBFD time-frequency resources can be configured in time-frequency resources (such as UL time slots, DL time slots, and flexible time slots). In this way, at the same time, data in different directions from other time-frequency resources can be transmitted on the SBFD time-frequency resources. For example, SBFD time-frequency resources are configured in the DL time slot, and uplink data is transmitted via the SBFD time-frequency resources, so that the uplink data is transmitted in the DL time slot. For another example, SBFD time-frequency resources are configured in the DL symbols of the flexible time slot, and uplink data is transmitted via the SBFD time-frequency resources, so that the uplink data is transmitted in the DL symbols of the flexible time slot. For another example, SBFD time-frequency resources are configured in the UL time slot, and downlink data is transmitted via the SBFD time-frequency resources, so that the downlink data is transmitted in the UL time slot. For another example, SBFD time-frequency resources are configured in the UL symbols of the flexible time slot, and downlink data is transmitted via the SBFD time-frequency resources, so that the downlink data is transmitted in the UL symbols of the flexible time slot.

[0069] In an example, SBFD time-frequency resources (SBFD time-frequency resources can also be called Subband time-frequency resources, i.e., sub-band time-frequency resources) can be time-frequency resources in an SBFD time slot or time-frequency resources in an SBFD symbol. The SBFD symbol can be defined as a symbol with an SBFD sub-band that the base station and the UE can be configured with. On the SBFD sub-band of these SBFD symbols (called SBFD time-frequency resources), the base station and the UE can perform full-duplex communication, that is, on the SBFD time-frequency resources, uplink transmission, downlink transmission, or simultaneous uplink and downlink transmission can be performed.

[0070] Among them, the SBFD time-frequency resources can be explicitly indicated as uplink, downlink, or flexible. When the SBFD time-frequency resources are indicated as flexible, uplink or downlink can be flexibly scheduled in the SBFD time-frequency resources. If the SBFD time-frequency resources are not explicitly indicated, it means that they are flexible and can be used to transmit uplink or downlink data. The configuration of SBFD symbols may include: which symbols in the DL time slot, UL time slot, and F time slot are used for SBFD transmission, as well as the implementation period and starting point. For ease of description, in the subsequent embodiments, the SBFD time-frequency resources corresponding to the SBFD time slot are used as an example for explanation.

[0071] In one example, SBFD indicated as uplink is called UL-SBFD, i.e., SBFD time-frequency resources are used for uplink, and SBFD indicated as downlink is called DL-SBFD, i.e., SBFD time-frequency resources are used for downlink. To support FD communication, SBFD time-frequency resources can be semi-statically configured, such as through RRC (Radio Resource Control) signaling, or dynamically configured, such as through DCI (Downlink Control Information).

[0072] SBFD time-frequency resources can be configured in DL symbols, F symbols, and UL symbols. Symbols configured with SBFD time-frequency resources are called SBFD symbols, and the remaining symbols not configured with SBFD time-frequency resources are called ordinary symbols. That is, non-SBFD symbols are called ordinary symbols, such as UL symbols, DL symbols, and F symbols. SBFD can be configured in some symbols of a time slot. That is, some symbols of a time slot are SBFD symbols, and the rest are ordinary symbols, so that DL or UL data transmission can span ordinary symbols or SBFD symbols. Among them, time slots configured with SBFD time-frequency resources (such as UL time slots, DL time slots, and flexible time slots) are called SBFD time slots, and symbols configured with SBFD time-frequency resources are called SBFD symbols.

[0073] For example, CSI-RS is a reference signal used for time / frequency tracking, CSI (Channel State Information) calculation, L1-RSRP (Reference Signal Receiving Power) calculation, L1-SINR (Signal Interference Noise Ratio) calculation, and mobility management. Technologies such as MIMO (Multiple Input Multiple Output) and beamforming are all implemented based on CSI-RS.

[0074] CSI is a general term for information reflecting the channel state measured by the UE based on the CSI-RS. It may include but is not limited to CQI (Channel Quality Indicator), PMI (Precoder Matrix Indicator), LI (Layer Indicator), RI (Rank Indicator), L1-RSRP, L1-SINR, etc. The base station can select an appropriate scheduling strategy and transmission mode based on the CSI fed back by the UE to improve the overall performance of the communication system.

[0075] CSI-RS is used for time / frequency tracking, CSI measurement, beam refinement and management, interference measurement, and mobility management. Its parameters are configured through higher-layer signaling. For CSI-RS used for time / frequency tracking, in FR1, the key features are as follows: an NZP-CSI-RS-ResourceSet consisting of four periodic NZP-CSI-RS (Non Zero Power CSI-RS) resources, configured with the trs-Info parameter. These four CSI-RS resources are distributed across two consecutive time slots, with two CSI-RS resources mapped to each time slot, and are spaced a fixed four symbols (l∈{4,8},l∈{5,9}, or l∈{6,10} for frequency range 1). Each CSI-RS resource is a port with a frequency domain density of 3, i.e., one RB (Resource Block) occupies 3 REs (Resource Elements). The bandwidth is min{52, BWP size} or equal to the BWP (Bandwidth Part) size.

[0076] In FR2, the main characteristics of CSI-RS are as follows: an NZP-CSI-RS-ResourceSet consisting of two periodic NZP-CSI-RS resources, which are distributed in one consecutive time slot, or an NZP-CSI-RS-ResourceSet consisting of four periodic NZP-CSI-RS resources, which are distributed in two consecutive time slots. Each time slot maps two CSI-RS resources, and the time domain spacing is a fixed four symbols (l∈{0,4},l∈{1,5},or l∈{2,6},l∈{3,7},l∈{7,11},l∈{8,12},or l∈{9,13} for frequency range 2). Each CSI-RS resource is one port with a frequency domain density of 3. The bandwidth is min{52,BWP size} or equal to the BWP size.

[0077] The key features of CSI-RS resources used for CSI measurement, beam refinement and management, mobility management, and interference measurement are as follows: In the time domain, they can be configured to use a maximum of four symbols, with arbitrary positions within a timeslot. They can be configured as periodic, aperiodic, or semi-persistent. Aperiodic and semi-persistent CSI-RS are activated via MAC CE or DCI. In the frequency domain, they occupy a minimum of 24 PRBs (Physical Resource Blocks) and a maximum of a BWP size. The frequency domain density can be configured to values ​​such as 0.5, 1, or 3. The number of ports per CSI-RS resource can be configured as 1, 2, 4, 8, 16, or 32, depending on the application.

[0078] For CSI-RS resources used for CSI measurement, beam refinement and management, mobility management, interference measurement and other functions, the UE will measure the CSI-RS, obtain the CSI results, and report the CSI results to the base station in the UCI for the base station to use for overall scheduling. Each CSI report will correspond to a certain CSI-RS resource. The content of the CSI report may include but is not limited to: CSI-RS resource indication, rank indication, layer indication, CQI, PMI, L1-RSRP, L1-SINR, etc. The content of each report varies depending on the purpose and high-level signaling configuration. The type of CSI report can be configured as periodic, aperiodic and semi-persistent. Aperiodic and semi-persistent CSI reports can be triggered by DCI.

[0079] In an example, a base station sends CSI-RS to a UE, and a UE sends CSI to a base station. A CSI-RS resource scheduling method and a CSI reporting method are proposed for the transmission process of CSI-RS and CSI in the full-duplex mode of TDD. When transmitting CSI-RS using SBFD time-frequency resources, the overlap between the CSI-RS resources and the UL Subband (uplink subband) is processed, and an appropriate transmission strategy is selected to transmit the CSI-RS in the corresponding time-frequency resources. Due to the different configurations of different types of CSI-RS resources, different transmission strategies can be selected for different types of CSI-RS resources, and corresponding CSI reporting methods are given for different transmission strategies. By providing a CSI reporting method for SBFD time-frequency resources, the CSI-RS transmission strategy is adapted, and a power control method for the CSI-RS in the SBFD time-frequency resources is provided. By specifying the CSI-RS transmission strategy, CSI reporting method, and CSI-RS power control method in the SBFD time-frequency resources, the SBFD time-frequency resources can be more efficiently used for uplink and downlink transmission, thereby improving the overall performance of the communication system.

[0080] First, data transmission control for SBFD symbols.

[0081] For a half-duplex UE supporting the SBFD function, the UE can obtain configurations related to SBFD time-frequency resources. However, the UE can only receive DL data or send UL data at the same time (symbol).

[0082] The base station configures SBFD time-frequency resources for half-duplex UEs that support the SBFD function. SBFD time-frequency resources are configured for the UE in DL time slots or DL ​​symbols. These resources are used to transmit UL data. Specifically, the SBFD time-frequency resources are UL subbands, and DL symbols configured with SBFD time-frequency resources are SBFD symbols. In addition to the UL subband, SBFD symbols contain DL subbands and a guard band (also known as a guard subband). The guard band is located between the UL and DL subbands.

[0083] SBFD time-frequency resources are configured for the UE in the UL time slot or UL symbol, and the SBFD time-frequency resources are used to transmit DL data, that is, the SBFD time-frequency resources are the DL subband, the UL symbol configured with the SBFD time-frequency resources is the SBFD symbol, and the SBFD symbol contains the UL subband and the protection bandwidth in addition to the DL subband. SBFD time-frequency resources are configured for the UE in the F symbol, and the SBFD time-frequency resources are used to transmit DL data (or UL data), that is, the SBFD time-frequency resources are the DL subband (or UL subband), the F symbol configured with the SBFD time-frequency resources is the SBFD symbol, and the SBFD symbol contains the UL subband and the protection bandwidth (or the DL subband and the protection bandwidth) in addition to the DL subband (or UL subband).

[0084] Referring to Figure 2 , which is a schematic diagram of SBFD time-frequency resources, the base station configures SBFD time-frequency resources for the UE in the DL time slot or DL ​​symbol. The SBFD time-frequency resources are the UL Subband, and the area outside the UL Subband is the DL Subband. The black part between the UL Subband and the DL Subband is the protection bandwidth.

[0085] The base station can semi-statically configure SBFD time-frequency resources or dynamically configure SBFD time-frequency resources, such as semi-statically configuring SBFD time-frequency resources through TDD-UL-DL-ConfigCommon signaling (TDD uplink and downlink common configuration) or TDD-UL-DL-ConfigDedicated (TDD uplink and downlink dedicated configuration) signaling, or dynamically configuring SBFD time-frequency resources through DCI.

[0086] For half-duplex UEs that do not support the SBFD function, since they cannot know the configuration related to the SBFD time-frequency resources, even if the DL time slot or DL ​​symbol is configured with SBFD time-frequency resources (UL Subband), the UE can still receive CSI-RS normally in the SBFD time-frequency resources (UL Subband).

[0087] For half-duplex UEs supporting SBFD, since the UE can obtain the configuration related to the SBFD time-frequency resources, in order for the UE to properly receive CSI-RS in the SBFD time-frequency resources, it is necessary to clarify whether DL data can be transmitted outside the DL subband (SBFD time-frequency resources serve as the DL subband), that is, whether DL data can be transmitted in the UL subband or guard bandwidth. For example, DL data transmission outside the DL subband may be prohibited, meaning that DL data can only be transmitted in the DL subband. Alternatively, DL data transmission outside the DL subband may be permitted, meaning that DL data can be transmitted in the UL subband and / or guard bandwidth.

[0088] Which scheme to adopt can be indicated by an indicator bit. For example, the base station can send a third indication information (such as a 1-bit indication bit) to the UE, and the third indication information is used to indicate that DL data is allowed to be transmitted outside the DL Subband of the SBFD symbol, or to indicate that DL data is not allowed to be transmitted outside the DL Subband of the SBFD symbol. For example, when the base station configures the SBFD time-frequency resources (i.e., DL Subband), it can additionally introduce a parameter: dlReceptionOutDlSubband ENUMERATED{enabled}, Optional. This parameter is an optional parameter. If this parameter is not configured, the second scheme is used by default, that is, DL data transmission outside the DL Subband is not allowed. If this parameter is configured, the first scheme is used, that is, DL data transmission outside the DL Subband is allowed.

[0089] For half-duplex UEs supporting SBFD, since the UE can obtain the configuration related to the SBFD time-frequency resources, in order for the UE to properly receive CSI-RS in the SBFD time-frequency resources, it is necessary to clarify whether UL data can be transmitted outside the UL subband (SBFD time-frequency resources serve as the UL subband), that is, whether UL data can be transmitted in the DL subband or guard bandwidth. For example, UL data transmission outside the UL subband may be prohibited, meaning that UL data can only be transmitted in the UL subband. Alternatively, UL data transmission outside the UL subband may be permitted, meaning that UL data can be transmitted in the DL subband and / or guard bandwidth.

[0090] Which scheme to adopt can be indicated by an indicator bit. For example, the base station can send a fourth indication information (such as a 1-bit indication bit) to the UE, and the fourth indication information is used to indicate that UL data is allowed to be transmitted outside the UL Subband of the SBFD symbol, or to indicate that UL data is not allowed to be transmitted outside the UL Subband of the SBFD symbol. For example, when the base station configures the SBFD time-frequency resources (i.e., UL Subband), it can additionally introduce a parameter: ulTransmissionOutUlSubband ENUMERATED{enabled}, Optional. This parameter is an optional parameter. If this parameter is not configured, the second scheme is used, that is, UL data transmission outside the UL Subband is not allowed. If this parameter is configured, the first scheme is used, that is, UL data transmission outside the UL Subband is allowed.

[0091] Regardless of whether the first or second solution is used, for a half-duplex UE supporting the SBFD function, only DL data can be received or UL data can be sent in the same symbol. When DL data reception and UL data transmission occur simultaneously in the same symbol, the UE needs to clarify the conflict resolution method at this time. Please refer to the subsequent embodiments. The UEs in the subsequent embodiments all refer to half-duplex UEs supporting the SBFD function.

[0092] Second, CSI-RS resource configuration.

[0093] For the same UE, when CSI-RS and UL data exist at the same time, it is necessary to compare the priorities of CSI-RS and UL data. If the priority of CSI-RS is higher than that of UL data, the UE receives CSI-RS. If the priority of CSI-RS is lower than that of UL data, the UE gives up receiving CSI-RS.

[0094] For example, for dynamically scheduled UL data transmission, such as PUSCH (Physical Uplink Shared Channel), the base station should try to avoid dynamically scheduling PUSCH on symbols where CSI-RS exists. If dynamic PUSCH scheduling is required, the priority of PUSCH is higher than the priority of CSI-RS, so the UE gives up receiving CSI-RS. For semi-statically scheduled PUSCH, the priority of PUSCH is higher than the priority of CSI-RS, so the UE gives up receiving CSI-RS.

[0095] When SRS and CSI-RS conflict at the same time, a judgment needs to be made based on the type: Aperiodic (non-periodic) has a higher priority than Semi-persistent (semi-persistent), and Semi-persistent has a higher priority than Periodic (periodic). For example, Aperiodic-scheduled SRS has a higher priority than Periodic-scheduled or Semi-persistent-scheduled CSI-RS, and Aperiodic-scheduled CSI-RS has a higher priority than Periodic-scheduled or Semi-persistent-scheduled SRS. For the same type, the UE does not expect the base station to activate Semi-persistent and / or Aperiodic CSI-RS and SRS in the same symbol at the same time. For Periodic-scheduled CSI-RS and SRS, CSI-RS has a higher priority.

[0096] In an example, it is assumed that the priority of CSI-RS is higher than the priority of UL data. That is, it is assumed that when the UE receives the CSI-RS, the CSI-RS conflict resolution has been performed and the CSI-RS can be correctly received.

[0097] In an example, when configuring CSI-RS resources in SBFD symbols, a unified configuration method of CSI-RS resources and / or a separate configuration method of CSI-RS resources can be adopted. The unified configuration method of CSI-RS resources and the separate configuration method of CSI-RS resources are described below.

[0098] For the unified configuration method of CSI-RS resources, the CSI-RS resources in SBFD symbols and the CSI-RS resources in normal symbols (i.e., non-SBFD symbols) share the same configuration, that is, the configuration of the CSI-RS resources in SBFD symbols and the CSI-RS resources in normal symbols are delivered through the same resource configuration information.

[0099] For the separate configuration of CSI-RS resources, the CSI-RS resources in SBFD symbols and the CSI-RS resources in normal symbols use different configurations. That is, the configuration of the CSI-RS resources in SBFD symbols is delivered through one resource configuration information, and the configuration of the CSI-RS resources in normal symbols is delivered through another resource configuration information.

[0100] Obviously, in the separate configuration mode, CSI-RS resources can be separately configured for the UE in the SBFD symbol, and the CSI-RS resources can be configured according to the SBFD time-frequency resources.

[0101] In one example, a unified or separate CSI-RS resource configuration approach can be used, and both approaches can coexist. For example, if the base station does not consider the configuration of SBFD time-frequency resources and only configures one CSI-RS resource set, a transmission mechanism needs to be addressed when the unified CSI-RS overlaps with the UL subband. If the base station considers the configuration of SBFD time-frequency resources and configures one CSI-RS resource set in the DL subband, this configuration can coexist with the unified CSI-RS resource configuration.

[0102] Third, unified configuration of CSI-RS resources and CSI reporting.

[0103] In a unified configuration mode for CSI-RS resources, the CSI-RS resources in SBFD symbols and the CSI-RS resources in normal symbols share the same configuration. Therefore, the CSI-RS resources in a CSI-RS resource set may span normal symbols and SBFD symbols in the same time slot. Alternatively, different CSI-RS resources in a CSI-RS resource set may be in normal symbols or SBFD symbols. Alternatively, the CSI-RS resources in a CSI-RS resource set may be in normal symbols or SBFD symbols in different periods. This may cause CSI-RS resources to overlap with UL subbands or guard bandwidths.

[0104] Referring to FIG3 , which is a schematic diagram of configuring CSI-RS resource sets (denoted as the first CSI-RS resource set) for SBFD symbols and normal symbols, the first CSI-RS resource set may include first-type CSI-RS resources (such as CSI-RS0) located in normal symbols, and the first CSI-RS resource set may include second-type CSI-RS resources (such as CSI-RS1) located in SBFD symbols, and the second-type CSI-RS resources exceed the range of the DL subband of the SBFD symbol, that is, the second-type CSI-RS resources overlap with the UL subband or the protection bandwidth.

[0105] The base station may allocate a first CSI-RS resource set to the UE, and the first CSI-RS resource set may include at least one first-type CSI-RS resource and / or at least one second-type CSI-RS resource.

[0106] The base station sends first resource configuration information corresponding to the first CSI-RS resource set to the UE. After receiving the first resource configuration information, the UE determines the first CSI-RS resource set based on the first resource configuration information. The first resource configuration information is resource configuration information in a dynamic manner or resource configuration information in a semi-static manner. The base station can send CSI-RS to the UE based on the first type of CSI-RS resources and / or the second type of CSI-RS resources in the first CSI-RS resource set, and the UE can receive CSI-RS based on the first type of CSI-RS resources and / or the second type of CSI-RS resources in the first CSI-RS resource set. The UE can also measure the received CSI-RS to obtain CSI and send the CSI to the base station.

[0107] In an example, for each first-type CSI-RS resource in the first CSI-RS resource set, since the first-type CSI-RS resource is located in a common symbol, the base station can send a CSI-RS to the UE based on the first-type CSI-RS resource. The UE can receive the CSI-RS based on the first-type CSI-RS resource and measure the CSI-RS received by the first-type CSI-RS resource to obtain CSI. The CSI is subsequently recorded as second channel state information and the second channel state information is sent to the base station.

[0108] In an example, for each second-type CSI-RS resource in the first CSI-RS resource set, the second-type CSI-RS resource is located in an SBFD symbol, and the second-type CSI-RS resource includes a first portion of resources located in a DL subband of the SBFD symbol and a second portion of resources located in a UL subband or a guard subband of the SBFD symbol. On this basis:

[0109] If downlink data transmission outside the DL subband of the SBFD symbol is allowed, the base station sends a CSI-RS to the UE based on the first part of the resources and the second part of the resources. The UE receives the CSI-RS based on the first part of the resources and the second part of the resources, measures the received CSI-RS, obtains channel state information (i.e., measurement results), and sends the channel state information to the base station.

[0110] If downlink data transmission outside the DL subband of the SBFD symbol is not allowed, the following method can be used: Method 1: the base station prohibits sending CSI-RS to the UE based on the first part of resources and the second part of resources, and the UE prohibits receiving CSI-RS based on the first part of resources and the second part of resources.

[0111] In mode 1, if the second type of CSI-RS resources exceeds the range of the DL suband, the base station gives up sending the CSI-RS, and the UE no longer receives and measures the CSI-RS on the corresponding time-frequency resources.

[0112] For periodic or semi-persistent CSI-RS, the UE may also measure the CSI-RS received in the previous period that does not overlap with the uplink subband or guard subband, and use this as the channel state information for the current period, and send this channel state information to the base station. For example, the UE measures the CSI-RS that does not overlap with the UL subband in the previous period of the second-type CSI-RS resource, reports the CSI results to the base station according to the current CSI reporting process, and does not configure timeRestricionForChannelMeasurement in RRC signaling.

[0113] In Method 2, the base station transmits CSI-RS to the UE based on the first portion of resources and prohibits transmission of CSI-RS to the UE based on the second portion of resources. The UE receives CSI-RS based on the first portion of resources and prohibits reception of CSI-RS based on the second portion of resources. In Method 2, CSI-RS is transmitted only within the DL subband, discarding the portion outside the DL subband. The UE receives part of the CSI-RS within the DL subband.

[0114] In an example, for the CSI-RS used for time-frequency tracking, if the frequency domain resource size used to transmit the CSI-RS (i.e., the first part of the resources) is greater than 52 PRBs, the UE uses the CSI-RS in the DL Subband to track the time offset and frequency offset. If the frequency domain resource size used to transmit the CSI-RS is not greater than 52 PRBs, the UE will not use the CSI-RS in the DL Subband to track the time offset and frequency offset.

[0115] For CSI-RS used for purposes other than time-frequency tracking, if the size of the frequency domain resources used to transmit CSI-RS is greater than 24 PRBs, the UE can use the CSI-RS in the DL subband for measurement, obtain the CSI results and report them to the base station. If the size of the frequency domain resources used to transmit CSI-RS is less than 24 PRBs, the UE will not use the CSI-RS in the DL subband for measurement.

[0116] In an example, after the UE receives CSI-RS based on the first part of resources and prohibits receiving CSI-RS based on the second part of resources, it can measure the CSI-RS received in the first part of resources to obtain first channel state information (i.e., CSI measurement results), and send the first channel state information to the base station.

[0117] In summary, the UE can obtain the first channel state information (the CSI measurement result corresponding to the CSI-RS received by the first part of the resources in the second type of CSI-RS resources) and the second channel state information (the CSI measurement result corresponding to the CSI-RS received by the first type of CSI-RS resources). The UE can send the first channel state information and the second channel state information to the base station through different uplink resources. The UE can also send the first channel state information and the second channel state information to the base station through the same uplink resources. For example, CSI reporting is associated with a CSI-RS resource set. For periodic or semi-persistent CSI-RS resource sets that span SBFD symbols or ordinary symbols, CSI can be reported in the following manner:

[0118] Method A: Different CSI reporting configurations are configured for the periodic or semi-persistent CSI-RS resources of SBFD symbols (i.e., second-type CSI-RS resources) and the periodic or semi-persistent CSI-RS resources of normal symbols (i.e., first-type CSI-RS resources). For example, CSI reporting needs to be associated with a CSI-RS resource in the CSI-RS resource set. That is, CSI-RS resources that do not overlap with the UL subband or guard bandwidth (i.e., first-type CSI-RS resources) and CSI-RS resources that overlap with the UL subband or guard bandwidth (i.e., second-type CSI-RS resources) each have their own associated CSI reporting configurations.

[0119] In summary, both the first type of CSI-RS resources and the second type of CSI-RS resources have separately associated CSI reporting configurations. Therefore, the UE sends the first channel state information corresponding to the second type of CSI-RS resources and the second channel state information corresponding to the first type of CSI-RS resources to the base station through different uplink resources.

[0120] Method B: Configure the same CSI reporting for the periodic or semi-persistent CSI-RS resources of SBFD symbols and the periodic or semi-persistent CSI-RS resources of normal symbols, that is, the first type of CSI-RS resources and the second type of CSI-RS resources correspond to the same CSI reporting configuration. Therefore, the UE can send the first channel state information corresponding to the second type of CSI-RS resources and the second channel state information corresponding to the first type of CSI-RS resources to the base station through the same uplink resources.

[0121] For Mode A and Mode B, the base station does not need to inform the UE through special high-layer signaling. When configuring CSI reporting, it only needs to associate the CSI report with the corresponding CSI-RS resource.

[0122] In one example, in mode 2, for wideband CSI reporting, the UE measures the first channel state information based only on all CSI-RSs in non-overlapping time-frequency resources (i.e., the first part of the second type of CSI-RS resources) and sends the first channel state information to the base station. The first channel state information may include but is not limited to at least one of the following: CQI, PMI, RI, LI, L1-RSRP, and L1-SINR.

[0123] In an example, for CSI-RS used for beam refinement and beam management, if there are second-type CSI-RS resources that overlap with the UL subband or guard bandwidth, and first-type CSI-RS resources that do not overlap with the UL subband or guard bandwidth, the reporting of L1-RSRP and / or L1-SINR may include:

[0124] If the first channel state information includes multiple first L1-RSRPs and the second channel state information includes multiple second L1-RSRPs, the UE may select N first L1-RSRPs from the multiple first L1-RSRPs and N second L1-RSRPs from the multiple second L1-RSRPs, and send the N first L1-RSRPs and N second L1-RSRPs to the base station. And / or, if the first channel state information includes multiple first L1-SINRs and the second channel state information includes multiple second L1-SINRs, the UE may select N first L1-SINRs from the multiple first L1-SINRs and N second L1-SINRs from the multiple second L1-SINRs, and send the N first L1-SINRs and N second L1-SINRs to the base station.

[0125] For example, the L1-RSRP and / or L1-SINR in the CSI can be divided into two groups, each group containing N values ​​(reporting only L1-RSRP or L1-SINR) or 2N values ​​(reporting both L1-RSRP and L1-SINR), with N being 1, 2, 3, etc., without limitation. Each group of CSI includes the maximum L1-RSRP value, the second-largest L1-RSRP value, ..., the Nth-largest L1-RSRP value, and / or the maximum L1-SINR value, the second-largest L1-SINR value, ..., the Nth-largest L1-SINR value. The first group of CSI is derived from non-overlapping first-type CSI-RS resources, i.e., N second L1-RSRPs and / or N second L1-SINRs are selected from the second channel state information. The second group of CSI is derived from overlapping second-type CSI-RS resources, i.e., N first L1-RSRPs and / or N first L1-SINRs are selected from the first channel state information.

[0126] Arrange in order of the content of the first group of CSI and the content of the second group of CSI, or arrange in order of the content of the second group of CSI and the content of the first group of CSI. For example, the arrangement result is N second L1-RSRPs, N second L1-SINRs, N first L1-RSRPs, and N first L1-SINRs.

[0127] See Table 1, which shows an example of the structure of L1-RSRP and L1-SINR in CSI.

[0128] Table 1

[0129] If N is 2, non-overlapping RSRP#1 / SINR#1 is the maximum L1-RSRP / L1-SINR value in the second channel state information, non-overlapping RSRP#2 / SINR#2 is the second-largest L1-RSRP / L1-SINR value in the second channel state information, Differential RSRP#2 / SINR#2 is the difference between the second-largest L1-RSRP / L1-SINR value and the maximum L1-RSRP / L1-SINR value. Overlapping RSRP#1 / SINR#1 is the maximum L1-RSRP / L1-SINR value in the first channel state information, and overlapping RSRP#2 / SINR#2 is the second-largest L1-RSRP / L1-SINR value in the first channel state information.

[0130] If the first channel state information includes multiple first L1-RSRPs and the second channel state information includes multiple second L1-RSRPs, the UE selects 2N L1-RSRPs from the multiple first L1-RSRPs and the multiple second L1-RSRPs and sends the 2N L1-RSRPs to the base station. And / or, if the first channel state information includes multiple first L1-SINRs and the second channel state information includes multiple second L1-SINRs, the UE selects 2N L1-SINRs from the multiple first L1-SINRs and the multiple second L1-SINRs and sends the 2N L1-SINRs to the base station. For example, the CSI content includes the maximum L1-RSRP value, the second largest L1-RSRP value, ..., the 2Nth largest L1-RSRP value, and / or the maximum L1-SINR value, the second largest L1-SINR value, ..., the 2Nth largest L1-SINR value. The CSI content can be obtained from non-overlapping first-type CSI-RS resources and overlapping second-type CSI-RS resources, that is, selected from all channel state information.

[0131] In one example, wideband CSI reporting can only report coarse-grained CSI. To obtain finer-grained CSI, subband-based CSI reporting can be introduced. This reporting is based on a CSI subband (CSI subband, which differs from the subband in SBFD). The base station can configure different CSI subband sizes based on the BWP size. Table 2 shows examples of CSI subband sizes. The CSI reported based on the CSI subband can be PMI and / or CQI, without limitation.

[0132] Table 2

[0133] In an example, if the first part of the second type of CSI-RS resources corresponds to at least one CSI subband, for each CSI subband, if the CSI subband completely overlaps with the uplink subband or guard subband of the SBFD symbol, measurement of the CSI-RS received in the CSI subband is prohibited, that is, the UE abandons reporting the CSI in the CSI subband that completely overlaps with the UL subband, and reports the CSI in the CSI subband that does not overlap.

[0134] For each CSI subband, if the CSI subband does not overlap with the uplink subband or guard subband of the SBFD symbol, the CSI-RS received in the CSI subband is measured to obtain the measurement result of the CSI subband (i.e., the first channel state information), that is, the UE reports the CSI in the non-overlapping CSI subband.

[0135] For each CSI subband, if the CSI subband partially overlaps with the uplink subband or guard subband of an SBFD symbol, the following processing is used. Figure 4 shows a diagram of CSI subband and UL subband misalignment. Both the RBG (Resource Block Group) size and the CSI subband size are 8PRBs. In RBG2 and RBG14, there is a misalignment between the UL subband / guard subband and the CSI subband, meaning that the CSI subband partially overlaps with the UL subband or guard subband.

[0136] Mode 2-1 prohibits measuring the CSI-RS received in the CSI subband, that is, the UE abandons reporting the CSI in the CSI subband that partially overlaps with the UL Subband, and reports the CSI in the CSI subband that does not overlap.

[0137] Method 2-2: Determine whether to measure the CSI-RS received by the CSI subband based on the non-overlapping resource size of the CSI subband. If so, measure the CSI-RS received by the CSI subband to obtain the measurement result of the CSI subband. If not, prohibit measuring the CSI-RS received by the CSI subband.

[0138] For example, the CSI subband may include overlapping resources and non-overlapping resources with the UL Subband / protection subband. If the size of the non-overlapping resources is greater than or equal to half of the total resources of the CSI subband (this value is configurable and can also be 2 / 3, 3 / 4, etc.), such as when the size of the CSI subband is 8PRBs, if the size of the non-overlapping resources is greater than or equal to 4PRBs, the CSI-RS received by the CSI subband is measured (such as calculating the CSI based on the non-overlapping resources); otherwise, measurement of the CSI-RS received by the CSI subband is prohibited.

[0139] To summarize, if the first part of the second type of CSI-RS resources corresponds to at least one CSI subband, the measurement result of each CSI subband can be obtained, and the first channel state information can be determined based on the measurement result of each CSI subband, such as the first channel state information includes the measurement result of each CSI subband.

[0140] In an example, as to whether to use method 1 or method 2, and whether to use method 2-1 or method 2-2 in method 2, the base station can configure through signaling (such as RRC signaling). For example, the base station sends a first indication message to the UE, and the first indication message is used to indicate the use of method 1 (prohibiting the transmission of CSI-RS based on the first part of resources and the second part of resources) or method 2 (transmitting CSI-RS based on the first part of resources and prohibiting the transmission of CSI-RS based on the second part of resources). When the first indication message indicates the use of method 2, the base station may also send a second indication message to the UE, and the second indication message is used to indicate the use of method 2-1 (prohibiting the measurement of the CSI-RS received in the CSI subband) or method 2-2 (determining whether to measure the CSI-RS received in the CSI subband based on the non-overlapping resource size of the CSI subband).

[0141] For example, an example of RRC signaling sent by the base station may be as follows:

[0142] CSI-ReportConfig::=SEQUENCE{

[0143] …

[0144] csiReportUsingPartialCsirs ENUMERATED{enable},optional,

[0145] csiReportUsingPartialCsiSubband ENUMERATED{enable},optional,

[0146] …

[0147] }

[0148] If csiReportUsingPartialCsirs is configured, method 2 is used. If not, method 1 is used. Only when method 2 is used can csiReportUsingPartialCsiSubband be configured. If this parameter is configured, method 2-2 is used. If not, method 2-1 is used.

[0149] In an example, when reporting Subband CQI and Subband PMI, both Subband CQI and Subband PMI are measured and calculated by the UE using part of the available CSI-RS resources in the DL subband. There is no restriction on the reporting format of Subband CQI and Subband PMI. The order of Subband CQI and Subband PMI in CSI is arranged according to the order in which the Subband CQI and Subband PMI are actually calculated. For example, the Subband PMI and Subband CQI that overlap with the UL subband or the guard subband are removed, and only the Subband CQI and Subband PMI corresponding to the CSI subband corresponding to the available CSI-RS resources are reported. After receiving the CSI reported by the UE, the base station determines which PRBs the Subband CQI and Subband PMI reported by the CSI correspond to based on the corresponding CSI-RS frequency domain resources and the configuration of the CSI subband in the DL subband, so as to be used for scheduling subsequent data in the frequency domain.

[0150] Fourth, separate configuration of CSI-RS resources and CSI reporting.

[0151] In the separate configuration mode of CSI-RS resources, the CSI-RS resources in the SBFD symbols and the CSI-RS resources in the normal symbols use different configurations. For example, the base station can configure a second CSI-RS resource set and a third CSI-RS resource set for the UE. The second CSI-RS resource set can include the CSI-RS resources in the SBFD symbols, which are recorded as the third type of CSI-RS resources, and the third type of CSI-RS resources are located in the downlink subband of the SBFD symbols. The third CSI-RS resource set can include the CSI-RS resources in the normal symbols, which are recorded as the fourth type of CSI-RS resources, and the fourth type of CSI-RS resources are located in the downlink symbols.

[0152] For the third type of CSI-RS resources in the second CSI-RS resource set, the configuration of the third type of CSI-RS resources is adjusted so that all the third type of CSI-RS resources are located in the DL Subband. In the time domain, for periodic CSI-RS and semi-persistent CSI-RS, the time slot where the CSI-RS is located is determined according to CSI-ResourcePeriodicityAndOffset. For non-periodic CSI-RS, the time slot where the CSI-RS is located is determined by the time slot of the DCI activation message. Furthermore, firstOFDMSymbolInTimeDomain and firstOFDMSymbolInTimeDomain2 can also be used to determine the symbol position of the CSI-RS within the time slot to ensure that all separately configured third type CSI-RS resources are located in the SBFD symbol, that is, the third type of CSI-RS resources will not exceed the range of the DL Subband of the SBFD symbol.

[0153] Referring to FIG5 , which is a schematic diagram of configuring a CSI-RS resource set (denoted as the second CSI-RS resource set) for SBFD symbols, the second CSI-RS resource set includes third-type CSI-RS resources located in the SBFD symbols (such as CSI-RS0 and CSI-RS1, CSI-RS0 is located in time slot 1 of each frame structure period, and CSI-RS1 is located in time slot 4 of each frame structure period), and the third-type CSI-RS resources are located in the DL subband, and the third-type CSI-RS resources do not overlap with the UL subband or the protection bandwidth.

[0154] In an example, the base station may allocate a second CSI-RS resource set and a third CSI-RS resource set to the UE, and the second CSI-RS resource set may include at least one third type of CSI-RS resource, and the third CSI-RS resource set may include at least one fourth type of CSI-RS resource.

[0155] The base station sends second resource configuration information corresponding to the second CSI-RS resource set and third resource configuration information corresponding to the third CSI-RS resource set to the UE. After receiving the second resource configuration information and the third resource configuration information, the UE determines the second CSI-RS resource set based on the second resource configuration information and determines the third CSI-RS resource set based on the third resource configuration information. The second resource configuration information is resource configuration information in a dynamic manner or resource configuration information in a semi-static manner. The third resource configuration information is resource configuration information in a dynamic manner or resource configuration information in a semi-static manner.

[0156] The base station sends a CSI-RS to the UE based on the third type of CSI-RS resources in the second CSI-RS resource set and / or the fourth type of CSI-RS resources in the third CSI-RS resource set. The UE receives the CSI-RS based on the third type of CSI-RS resources in the second CSI-RS resource set and / or the fourth type of CSI-RS resources in the third CSI-RS resource set. The UE measures the received CSI-RS to obtain CSI and sends the CSI to the base station.

[0157] In an example, for each fourth-type CSI-RS resource in the third CSI-RS resource set, since the fourth-type CSI-RS resource is located in a downlink symbol, the base station can send a CSI-RS to the UE based on the fourth-type CSI-RS resource. The UE receives the CSI-RS based on the fourth-type CSI-RS resource, measures the CSI-RS received by the fourth-type CSI-RS resource to obtain CSI, and sends the CSI to the base station.

[0158] In an example, for each third-type CSI-RS resource in the second CSI-RS resource set, the third-type CSI-RS resource is located in the SBFD symbol, and the third-type CSI-RS resource does not exceed the range of the DL subband of the SBFD symbol. Therefore, the base station can send CSI-RS to the UE based on the third-type CSI-RS resource, and the UE receives CSI-RS based on the third-type CSI-RS resource, measures the CSI-RS received by the third-type CSI-RS resource to obtain CSI, and sends the CSI to the base station.

[0159] In one example, the third type of CSI-RS resources only include resources in the DL subband located in SBFD symbols. If the third type of CSI-RS resources only occupy contiguous resources in the DL subband, the second resource configuration information includes the RB starting position and the number of occupied RBs corresponding to the contiguous resources. If the third type of CSI-RS resources occupy two non-contiguous resources in the DL subband, the second resource configuration information includes the RB starting position and the number of occupied RBs corresponding to the two resources, respectively. As shown in Figure 5, CSI-RS1 occupies contiguous resources in the DL subband, and CSI-RS0 occupies two non-contiguous resources in the DL subband. That is, the two non-contiguous resources belong to the same CSI-RS and are located on opposite sides of the UL subband.

[0160] In the frequency domain, the starting RB and nrofRBs in the freqBand parameter determine the RB starting position and RB number of the CSI-RS resource in the frequency domain. The RB starting position and RB number ensure that the CSI-RS frequency domain resources are all in the DL subband. If the DL subband is two non-contiguous resources, an additional pair of startingRB and nrofRBs is introduced in the CSI-RS resource configuration. The two pairs of startingRB and nrofRBs indicate the CSI-RS resources in different DL subbands, as shown below:

[0161] CSI-FrequencyOccupation::=SEQUENCE{

[0162] startingRB INTEGER(0..maxNrofPhysicalResourceBlocks-1),

[0163] nrofRBs INTEGER(24..maxNrofPhysicalResourceBlocksPlus1),

[0164] startingRB1 INTEGER(0..maxNrofPhysicalResourceBlocks-1),

[0165] nrofRBs1 INTEGER(24..maxNrofPhysicalResourceBlocksPlus1),

[0166] ...

[0167] }

[0168] In one example, regarding the alignment of the CSI-RS resource with the DL subband boundary, the RB index of the starting position of the RB of the CSI-RS resource may be an integer multiple of a first value (e.g., 4), the number of RBs occupied by the CSI-RS resource is an integer multiple of the first value, and the minimum number of RBs occupied is a second value (e.g., 24). However, the starting position of the DL subband may not be an integer multiple of the first value, and the number of RBs occupied by the DL subband may be less than the second value. Based on this, the following approach can be adopted:

[0169] Method a: The starting position of the RB corresponding to the third type of CSI-RS resources is an integer multiple of the first value, and the number of occupied RBs corresponding to the third type of CSI-RS resources is greater than or equal to the second value, and the number of occupied RBs corresponding to the third type of CSI-RS resources is an integer multiple of the first value. For example, when configuring the third type of CSI-RS resources in a DL subband, the starting position of the RB is an integer multiple of 4, the number of occupied RBs is an integer multiple of 4, and the minimum number of occupied RBs is 24, that is, the number of occupied RBs is greater than or equal to 24. If the DL subband has less than 24 RBs, the configuration of the third type of CSI-RS resources in this DL subband is abandoned.

[0170] Method b: The starting position of the RB corresponding to the third-type CSI-RS resource is the starting position of the DL subband of the SBFD symbol, and the number of RBs occupied by the third-type CSI-RS resource is an arbitrary value. For example, when configuring the third-type CSI-RS resource in the DL subband, the starting position of the RB corresponding to the third-type CSI-RS resource is the starting position of the DL subband, and the number of RBs occupied is configured according to the frequency domain resources required by the third-type CSI-RS resource. That is, the number of RBs occupied is an arbitrary value. If the size of the third-type CSI-RS resource exceeds the range of the DL subband, the third-type CSI-RS resource occupies the entire DL subband.

[0171] In mode b, the RB index of the starting position of the RB corresponding to the third type of CSI-RS resource may not be an integer multiple of 4, the number of occupied RBs corresponding to the third type of CSI-RS resource may not be an integer multiple of 4, and the size of the number of occupied RBs corresponding to the third type of CSI-RS resource is not limited and can be any value.

[0172] For method b, if the CSI reporting is based on the subband granularity (i.e., CSI subband), the first CSI subband corresponding to the CSI-RS resource in the first DL subband starts from the startingRB, and the size is the size of the CSI subband configured by the high-level signaling The range of subsequent CSI subbands is calculated in sequence. If Then the size of the last CSI subband is if Then the size of the last CSI subband is If there is a second DL Subband and the DL Subband is configured with CSI-RS resources, the first CSI subband corresponding to the CSI-RS resources starts from startingRB1 and its size is the size of the CSI subband configured by the higher layer signaling. The range of subsequent CSI subbands is calculated in sequence. If The size of the last CSI subband is like Then the size of the last CSI subband is In this way, the CSI subband indices corresponding to the CSI-RS resources in all DL subbands are arranged from low to high according to the order of the starting PRB index.

[0173] For method b, a new capability parameter, such as csiRsCapability, can be introduced into the UE's capability set. If the UE supports the CSI-RS configuration specified in method b, the UE reports this parameter to the base station during the capability reporting process, and the base station can use method b to configure CSI-RS resources. If the UE does not report this capability, the base station defaults to method a to configure CSI-RS resources. In summary, if the UE's capability parameter indicates that it supports arbitrary RB starting positions, method b is used. If the UE's capability parameter indicates that it does not support arbitrary RB starting positions, method a is used.

[0174] In one example, the UE measures a separately configured CSI-RS resource (e.g., a third-category CSI-RS resource) and reports the measurement results in the CSI corresponding to that CSI-RS resource. The UE calculates measurement results such as RI, LI, L1-RSRP, L1-SINR, wideband CQI, and wideband PMI based on all time-frequency resources corresponding to that CSI-RS. For subband-based CSI reporting, the subband PMI and subband CQI within the CSI content are reported according to the subband index order described above.

[0175] Fifth, CSI-RS power control.

[0176] Regardless of whether unified or individual CSI-RS resource configuration is used, if CSI-RS is not allowed to be sent on resources outside the DL subband, the CSI-RS power allocation algorithm needs to be adjusted to adapt to the new CSI-RS resource configuration strategy. Assume that the total number of PRBs in the BWP is The PRBs allocated to CSI-RS in normal symbols are The PRBs allocated to CSI-RS in SBFD symbols are Since the UL Subband and the guard subband occupy part of the PRB resources, Assuming that the density of CSI-RS is ρ, that is, there is one RE in each PRB, the transmit power reserved for CSI-RS is Then, for CSI-RS sent only on the DL subband, the transmit power setting can adopt the following scheme:

[0177] The transmit power All of them are used for CSI-RS. In this scheme, the energy per RE (EPRE; Energy PER Resource Element) of CSI-RS is And it is greater than the EPRE of CSI-RS in normal symbols: In this way, the SINR when the UE receives the CSI-RS can be improved, which is beneficial to the reception of the downlink CSI-RS.

[0178] With the same EPRE as the CSI-RS in normal symbols, in this scheme, the total power of CSI-RS is This value is less than In this way, adjacent channel interference can be avoided, but the total power of the CSI-RS becomes smaller, which will have some impact on UE reception.

[0179] The base station determines which solution to use based on the scenario and does not need to inform the UE.

[0180] In an example, when a base station transmits CSI-RS based on a first portion of resources of a second type of CSI-RS resources and prohibits transmitting CSI-RS based on a second portion of resources of the second type of CSI-RS resources, a target transmit power may be determined based on a maximum transmit power of the second type of CSI-RS resources (i.e., a transmit power that matches the first portion of resources and the second portion of resources), and CSI-RS is transmitted based on the first portion of resources at the target transmit power. Alternatively, a target transmit power may be determined based on a maximum transmit power of the second type of CSI-RS resources and a resource ratio, where the resource ratio is a resource ratio of the first portion of resources to the second type of CSI-RS resources (i.e., the first portion of resources and the second portion of resources), and CSI-RS is transmitted based on the first portion of resources at the target transmit power.

[0181] Based on the same inventive concept, a CSI-RS transmission device corresponding to the CSI-RS transmission method, as well as a base station and a UE are also provided. Since the principles of solving the problem by the base station and the UE are similar to those of the CSI-RS transmission method, the implementation of the base station and the UE refers to the CSI-RS transmission method, and the repeated parts are not repeated here.

[0182] Based on the same application concept as the above method, an example of the present application proposes a CSI-RS transmission device, which is applied to a user equipment, as shown in Figure 6A, and the device includes: a first receiving module 611, which is used to receive resource configuration information corresponding to a CSI-RS resource set sent by a base station, wherein the resource configuration information is used to indicate a CSI-RS resource set, and the CSI-RS resource set includes a CSI-RS resource located in an SBFD symbol; the CSI-RS resource exceeds the range of the downlink subband of the SBFD symbol, or the CSI-RS resource is located in the downlink subband of the SBFD symbol; a second receiving module 612, which is used to receive the CSI-RS sent by the base station based on the CSI-RS resource in the CSI-RS resource set.

[0183] In an example, the resource configuration information includes first resource configuration information corresponding to a first CSI-RS resource set, where the first resource configuration information is used to indicate a first CSI-RS resource set, where the first CSI-RS resource set includes a first type of CSI-RS resource located in a normal symbol and a second type of CSI-RS resource located in an SBFD symbol, where the second type of CSI-RS resource exceeds a range of a downlink subband of the SBFD symbol; or

[0184] The resource configuration information includes second resource configuration information corresponding to the second CSI-RS resource set and third resource configuration information corresponding to the third CSI-RS resource set, the second resource configuration information is used to indicate the second CSI-RS resource set, and the third resource configuration information is used to indicate the third CSI-RS resource set; wherein, the second CSI-RS resource set includes a third type of CSI-RS resource located in the SBFD symbol, and the third type of CSI-RS resource is located in the downlink subband of the SBFD symbol, and the third CSI-RS resource set includes a fourth type of CSI-RS resource located in the normal symbol.

[0185] In an example, if the second-type CSI-RS resources include a first portion of resources located in a downlink subband of an SBFD symbol and a second portion of resources located in an uplink subband or a guard subband of an SBFD symbol, the second receiving module 612 is specifically configured to receive the CSI-RS sent by the base station based on the second-type CSI-RS resources in the first CSI-RS resource set:

[0186] If downlink data transmission outside the downlink subband of the SBFD symbol is allowed, receiving the CSI-RS based on the first part of resources and the second part of resources of the second type of CSI-RS resources;

[0187] Alternatively, if downlink data transmission outside the downlink subband of the SBFD symbol is not allowed, the reception of CSI-RS based on the first part of resources and the second part of resources of the second type of CSI-RS resources is prohibited; or, CSI-RS is received based on the first part of resources of the second type of CSI-RS resources, and the reception of CSI-RS based on the second part of resources of the second type of CSI-RS resources is prohibited.

[0188] In one example, the apparatus further includes (not shown in FIG6A ):

[0189] A sending module is configured to, after receiving CSI-RS based on the first part of resources of the second type of CSI-RS resources and prohibiting the reception of CSI-RS based on the second part of resources of the second type of CSI-RS resources, measure the CSI-RS received by the first part of resources of the second type of CSI-RS resources to obtain first channel state information, and send the first channel state information to the base station; after prohibiting the reception of CSI-RS based on the first part of resources and the second part of resources of the second type of CSI-RS resources, measure based on the CSI-RS that does not overlap with the uplink subband or the protection subband in the previous period, determine the measurement result as the channel state information of the current period, and send the channel state information to the base station.

[0190] In one example, the sending module is further configured to, after receiving the CSI-RS sent by the base station based on the first type of CSI-RS resources in the first CSI-RS resource set, measure the CSI-RS received by the first type of CSI-RS resources to obtain second channel state information, and send the second channel state information to the base station;

[0191] The sending module is specifically configured to send the first channel state information to the base station and send the second channel state information to the base station: if the first channel state information includes multiple first L1-RSRPs and the second channel state information includes multiple second L1-RSRPs, then select N first L1-RSRPs from the multiple first L1-RSRPs, and select N second L1-RSRPs from the multiple second L1-RSRPs, and send the N first L1-RSRPs and the N second L1-RSRPs to the base station; or select 2N L1-RSRPs from the multiple first L1-RSRPs and the multiple second L1-RSRPs, and send the 2N L1-RSRPs to the base station; and / or,

[0192] If the first channel state information includes multiple first L1-SINRs, and the second channel state information includes multiple second L1-SINRs, select N first L1-SINRs from the multiple first L1-SINRs, and select N second L1-SINRs from the multiple second L1-SINRs, and send the N first L1-SINRs and the N second L1-SINRs to the base station; or select 2N L1-SINRs from the multiple first L1-SINRs and the multiple second L1-SINRs, and send the 2N L1-SINRs to the base station.

[0193] In one example, the sending module measures the CSI-RS received from the first part of the second type of CSI-RS resources to obtain the first channel state information, specifically for:

[0194] If the first part of the second-type CSI-RS resources corresponds to at least one CSI subband, for each CSI subband, if the CSI subband completely overlaps with an uplink subband or a guard subband of an SBFD symbol, measurement of the CSI-RS received in the CSI subband is prohibited;

[0195] If the CSI subband does not overlap with an uplink subband or a guard subband of the SBFD symbol, measuring the CSI-RS received in the CSI subband to obtain a measurement result of the CSI subband;

[0196] If the CSI subband partially overlaps with the uplink subband or guard subband of the SBFD symbol, measuring the CSI-RS received in the CSI subband is prohibited; alternatively, determining whether to measure the CSI-RS received in the CSI subband based on the non-overlapping resource size of the CSI subband; if so, measuring the CSI-RS received in the CSI subband to obtain a measurement result of the CSI subband; if not, prohibiting measuring the CSI-RS received in the CSI subband;

[0197] The first channel state information is determined based on a measurement result of each CSI subband.

[0198] In one example, the first receiving module 611 is further configured to receive first indication information sent by the base station; wherein the first indication information is used to indicate prohibiting transmission of CSI-RS based on the first part and the second part of the second type of CSI-RS resources, or to indicate transmission of CSI-RS based on the first part of the second type of CSI-RS resources and prohibiting transmission of CSI-RS based on the second part of the second type of CSI-RS resources;

[0199] If the first indication information is used to indicate transmission of CSI-RS based on a first part of resources of the second type of CSI-RS resources and prohibit transmission of CSI-RS based on a second part of resources of the second type of CSI-RS resources, the first receiving module 611 is further used to receive second indication information sent by the base station;

[0200] The second indication information is used to indicate that measurement of the CSI-RS received on the CSI subband that overlaps with the uplink subband or the protection subband is prohibited, or to indicate whether to measure the CSI-RS received on the CSI subband based on the non-overlapping resource size of the CSI subband.

[0201] In one example, the sending module is further used to measure the CSI-RS received by the first type of CSI-RS resources in the first CSI-RS resource set after receiving the CSI-RS sent by the base station, obtain second channel state information, and send the second channel state information to the base station; wherein the first channel state information and the second channel state information are sent to the base station through different uplink resources; or, the first channel state information and the second channel state information are sent to the base station through the same uplink resource.

[0202] In one example, the third type of CSI-RS resources includes only resources located in the downlink subband of the SBFD symbol; wherein: if the third type of CSI-RS resources only occupies continuous resources of the downlink subband, the second resource configuration information includes the RB starting position and the number of RBs occupied corresponding to the continuous resources;

[0203] If the third type of CSI-RS resource occupies two non-contiguous resources of the downlink subband, the second resource configuration information includes the RB starting positions and the RB occupied quantities corresponding to the two resources respectively.

[0204] In one example, the starting position of the RB corresponding to the third type of CSI-RS resource is an integer multiple of the first value, and the number of RBs occupied by the third type of CSI-RS resource is greater than or equal to the second value, and the number of RBs occupied by the third type of CSI-RS resource is an integer multiple of the first value; or,

[0205] The starting position of the RB corresponding to the third type of CSI-RS resource is the starting position of the downlink subband of the SBFD symbol, and the number of RBs occupied by the third type of CSI-RS resource is an arbitrary value;

[0206] If the capability parameter of the user equipment indicates that it has the ability to support any RB starting position, the RB starting position corresponding to the third type of CSI-RS resource is the starting position of the downlink subband of the SBFD symbol, and the number of RBs occupied by the third type of CSI-RS resource is an arbitrary value;

[0207] If the capability parameter of the user equipment indicates that it does not have the ability to support arbitrary RB starting positions, then the RB starting position corresponding to the third type of CSI-RS resources is an integer multiple of the first value, and the number of RB occupations corresponding to the third type of CSI-RS resources is greater than or equal to the second value, and the number of RB occupations corresponding to the third type of CSI-RS resources is an integer multiple of the first value.

[0208] In one example, the first receiving module 611 is further configured to receive third indication information sent by the base station, where the third indication information is used to indicate that downlink data transmission outside the downlink sub-band of the SBFD symbol is allowed, or is used to indicate that downlink data transmission outside the downlink sub-band of the SBFD symbol is not allowed; and / or,

[0209] The first receiving module 611 is further used to receive fourth indication information sent by the base station, where the fourth indication information is used to indicate that uplink data transmission outside the uplink subband of the SBFD symbol is allowed, or to indicate that uplink data transmission outside the uplink subband of the SBFD symbol is not allowed.

[0210] Based on the same application concept as the above method, an example of the present application proposes a CSI-RS transmission device, which is applied to a base station, as shown in Figure 6B. The device may include: a first sending module 621, used to send resource configuration information corresponding to a CSI-RS resource set to a user equipment, wherein the resource configuration information is used to indicate a CSI-RS resource set used by the user equipment, and the CSI-RS resource set includes a CSI-RS resource located in an SBFD symbol; the CSI-RS resource exceeds the range of the downlink subband of the SBFD symbol, or the CSI-RS resource is located in the downlink subband of the SBFD symbol; a second sending module 622, used to send CSI-RS to the user equipment based on the CSI-RS resources in the CSI-RS resource set, so that the user equipment receives CSI-RS based on the CSI-RS resources in the CSI-RS resource set.

[0211] In an example, when the first sending module 621 sends the resource configuration information corresponding to the CSI-RS resource set to the user equipment, it is specifically configured to:

[0212] If the user equipment corresponds to a first CSI-RS resource set, first resource configuration information corresponding to the first CSI-RS resource set is sent to the user equipment; wherein the first CSI-RS resource set includes a first type of CSI-RS resource located in a normal symbol and a second type of CSI-RS resource located in a SBFD symbol, and the second type of CSI-RS resource has exceeded the range of the downlink subband of the SBFD symbol; or,

[0213] If the user equipment corresponds to the second CSI-RS resource set and the third CSI-RS resource set, the second resource configuration information corresponding to the second CSI-RS resource set and the third resource configuration information corresponding to the third CSI-RS resource set are sent to the user equipment; wherein, the second CSI-RS resource set includes a third type of CSI-RS resource located in the SBFD symbol, and the third type of CSI-RS resource is located in the downlink subband of the SBFD symbol, and the third CSI-RS resource set includes a fourth type of CSI-RS resource located in the normal symbol.

[0214] In an example, if the second type of CSI-RS resources includes a first portion of resources located in a downlink subband of an SBFD symbol and a second portion of resources located in an uplink subband or a guard subband of an SBFD symbol, the second sending module 622 sends the CSI-RS to the user equipment based on the second type of CSI-RS resources in the first CSI-RS resource set, specifically for:

[0215] If downlink data transmission outside the downlink subband of the SBFD symbol is allowed, the CSI-RS is sent based on the first part of the resources and the second part of the resources of the second type of CSI-RS resources;

[0216] Alternatively, if downlink data transmission outside the downlink subband of the SBFD symbol is not allowed, the sending of CSI-RS based on the first part of resources and the second part of resources of the second type of CSI-RS resources is prohibited; or, CSI-RS is sent based on the first part of resources of the second type of CSI-RS resources, and the sending of CSI-RS based on the second part of resources of the second type of CSI-RS resources is prohibited.

[0217] In one example, the first sending module 621 is further configured to send first indication information to the user equipment; wherein the first indication information is used to indicate prohibiting transmission of CSI-RS based on the first part and the second part of the second type of CSI-RS resources, or to indicate transmission of CSI-RS based on the first part of the second type of CSI-RS resources and prohibiting transmission of CSI-RS based on the second part of the second type of CSI-RS resources;

[0218] If the first indication information is used to indicate transmission of CSI-RS based on a first part of resources of the second type of CSI-RS resources and prohibit transmission of CSI-RS based on a second part of resources of the second type of CSI-RS resources, the first sending module is further used to send second indication information to the user equipment;

[0219] The second indication information is used to indicate that measurement of the CSI-RS received on the CSI subband that overlaps with the uplink subband or the protection subband is prohibited, or to indicate whether to measure the CSI-RS received on the CSI subband based on the non-overlapping resource size of the CSI subband.

[0220] In one example, the third type of CSI-RS resources includes only resources located in the downlink subband of the SBFD symbol; wherein: if the third type of CSI-RS resources only occupies continuous resources of the downlink subband, the second resource configuration information includes the RB starting position and the number of RBs occupied corresponding to the continuous resources;

[0221] If the third type of CSI-RS resource occupies two non-contiguous resources of the downlink subband, the second resource configuration information includes the RB starting positions and the RB occupied quantities corresponding to the two resources respectively.

[0222] In one example, the starting position of the RB corresponding to the third type of CSI-RS resource is an integer multiple of the first value, and the number of RBs occupied by the third type of CSI-RS resource is greater than or equal to the second value, and the number of RBs occupied by the third type of CSI-RS resource is an integer multiple of the first value; or,

[0223] The starting position of the RB corresponding to the third type of CSI-RS resource is the starting position of the downlink subband of the SBFD symbol, and the number of RBs occupied by the third type of CSI-RS resource is an arbitrary value;

[0224] If the capability parameter of the user equipment indicates that it has the ability to support any RB starting position, the RB starting position corresponding to the third type of CSI-RS resource is the starting position of the downlink subband of the SBFD symbol, and the number of RBs occupied by the third type of CSI-RS resource is an arbitrary value;

[0225] If the capability parameter of the user equipment indicates that it does not have the ability to support arbitrary RB starting positions, then the RB starting position corresponding to the third type of CSI-RS resources is an integer multiple of the first value, and the number of RB occupations corresponding to the third type of CSI-RS resources is greater than or equal to the second value, and the number of RB occupations corresponding to the third type of CSI-RS resources is an integer multiple of the first value.

[0226] In one example, the first sending module 621 is further used to send third indication information to the user equipment, wherein the third indication information is used to indicate that downlink data transmission outside the downlink subband of the SBFD symbol is allowed, or is used to indicate that downlink data transmission outside the downlink subband of the SBFD symbol is not allowed; and / or, the first sending module is further used to send fourth indication information to the user equipment, wherein the fourth indication information is used to indicate that uplink data transmission outside the uplink subband of the SBFD symbol is allowed, or is used to indicate that uplink data transmission outside the uplink subband of the SBFD symbol is not allowed.

[0227] In an example, the second sending module 622 sends the CSI-RS based on the first part of the second type of CSI-RS resources and prohibits sending the CSI-RS based on the second part of the second type of CSI-RS resources, and is specifically configured to:

[0228] determining a target transmit power based on a maximum transmit power of the second type of CSI-RS resources; or determining a target transmit power based on a maximum transmit power and a resource ratio of the second type of CSI-RS resources, where the resource ratio is a ratio of the first part of resources to the second type of CSI-RS resources;

[0229] Sending a CSI-RS based on the first portion of resources at the target transmit power.

[0230] Based on the same application concept as the above method, a base station is proposed in an example of the present application, as shown in Figure 7A. The base station may include a processor 711 and a machine-readable storage medium 712, and the machine-readable storage medium 712 stores machine-executable instructions that can be executed by the processor 711; the processor 711 is used to execute the machine-executable instructions to implement the CSI-RS transmission method disclosed in the above example of the present application.

[0231] In one example, the processor 711 may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor 711 may be implemented in at least one hardware form of DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), and PLA (Programmable Logic Array). The processor 711 may also include a main processor and a coprocessor. The main processor is a processor for processing data in the awake state, also known as a CPU (Central Processing Unit); the coprocessor is a low-power processor for processing data in the standby state. In some embodiments, the processor 711 may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content to be displayed on the display screen.

[0232] In one example, the base station may optionally include a peripheral device interface 713 and at least one peripheral device. The processor 711 and the peripheral device interface 713 may be connected via a bus or signal lines. Each peripheral device may be connected to the peripheral device interface 713 via a bus, signal lines, or circuit boards. The peripheral device may include at least one of a radio frequency circuit 714 and a power supply 715.

[0233] The radio frequency circuit 714 is used to receive and transmit RF (Radio Frequency) signals, also known as electromagnetic signals. The radio frequency circuit 714 communicates with communication networks and other communication devices via electromagnetic signals. The radio frequency circuit 714 converts electrical signals into electromagnetic signals for transmission, or converts received electromagnetic signals into electrical signals. Optionally, the radio frequency circuit 714 includes: an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a user identity module card, etc. The radio frequency circuit 714 can communicate with user equipment via at least one wireless communication protocol. Such wireless communication protocols include, but are not limited to, the World Wide Web, a metropolitan area network, an intranet, various generations of mobile communication networks (2G, 3G, 4G, and 5G), a wireless local area network, and / or a WiFi (Wireless Fidelity) network.

[0234] The power supply 715 is used to supply power to various components in the base station. The power supply 715 can be alternating current, direct current, a disposable battery, or a rechargeable battery.

[0235] For example, when the processor 711 executes the machine-executable instructions, it controls the radio frequency circuit 714 to implement the following steps: sending resource configuration information corresponding to the CSI-RS resource set to the user equipment, where the resource configuration information is used to indicate the CSI-RS resource set used by the user equipment, and the CSI-RS resource set includes a CSI-RS resource located in an SBFD symbol; the CSI-RS resource is beyond the range of the downlink subband of the SBFD symbol, or the CSI-RS resource is located in the downlink subband of the SBFD symbol;

[0236] The CSI-RS is sent to the user equipment based on the CSI-RS resources in the CSI-RS resource set, so that the user equipment receives the CSI-RS based on the CSI-RS resources in the CSI-RS resource set.

[0237] Based on the same application concept as the above method, a user equipment is proposed in an example of the present application, as shown in Figure 7B, the user equipment may include a processor 721 and a machine-readable storage medium 722, and the machine-readable storage medium 722 stores machine-executable instructions that can be executed by the processor 721; the processor 721 is used to execute the machine-executable instructions to implement the CSI-RS transmission method disclosed in the above example of the present application.

[0238] In one example, the processor 721 may include one or more processing cores, such as a quad-core processor, an octal-core processor, etc. The processor 721 may be implemented in at least one hardware form selected from the group consisting of a DSP, an FPGA, and a PLA. The processor 721 may also include a main processor and a coprocessor.

[0239] In one example, the user device further includes a peripheral device interface 723 and at least one peripheral device. The processor 721 and the peripheral device interface 723 may be connected via a bus or signal lines. Each peripheral device may be connected to the peripheral device interface 723 via a bus, signal lines, or circuit boards. The peripheral device may include at least one of a radio frequency circuit 724, a touch screen display 725, a camera 726, and a power supply 727.

[0240] The radio frequency circuit 724 is used to receive and transmit RF signals, also known as electromagnetic signals. The radio frequency circuit 724 communicates with the communication network and other communication devices via electromagnetic signals. The radio frequency circuit 724 converts electrical signals into electromagnetic signals for transmission, or converts received electromagnetic signals into electrical signals. Optionally, the radio frequency circuit 724 includes an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a subscriber identity module card, and the like. The radio frequency circuit 724 can communicate with the base station via at least one wireless communication protocol. Such wireless communication protocols include, but are not limited to, the World Wide Web, a metropolitan area network, an intranet, various generations of mobile communication networks, a wireless local area network, and / or WiFi.

[0241] The display screen 725 is used to display a UI (User Interface). The UI may include graphics, text, icons, videos, and any combination thereof. When the display screen 725 is a touch screen display, the display screen 725 also has the ability to collect touch signals on or above the surface of the display screen 725. The touch signals can be input as control signals to the processor 721 for processing. In this case, the display screen 725 can also be used to provide virtual buttons and / or virtual keyboards, also known as soft buttons and / or soft keyboards.

[0242] In some embodiments, the display screen 725 can be one, set on the front panel of the user device; in other embodiments, the display screen 725 can be at least two, set on different surfaces of the user device or in a folding design; in still other embodiments, the display screen 725 can be a flexible display screen, set on a curved surface or a folding surface of the user device. The display screen 725 can even be set into a non-rectangular irregular shape, that is, a special-shaped screen. The display screen 725 can be made of materials such as LCD (Liquid Crystal Display) and OLED (Organic Light-Emitting Diode).

[0243] The camera assembly 726 is used to capture images or videos. Optionally, the camera assembly 726 includes a front camera and a rear camera. Typically, the front camera is set on the front panel of the user device, and the rear camera is set on the back of the user device. In some embodiments, there are at least two rear cameras, which are any one of a main camera, a depth of field camera, a wide-angle camera, and a telephoto camera, so as to realize the fusion of the main camera and the depth of field camera to realize the background blur function, the fusion of the main camera and the wide-angle camera to realize panoramic shooting and VR (Virtual Reality) shooting function or other fusion shooting functions. In some embodiments, the camera assembly 726 may also include a flash. The flash can be a single-color temperature flash or a dual-color temperature flash. A dual-color temperature flash refers to a combination of a warm light flash and a cold light flash, which can be used for light compensation at different color temperatures.

[0244] Power supply 727 is used to power various components in the user device. Power supply 727 can be AC ​​power, DC power, a disposable battery, or a rechargeable battery. When power supply 727 includes a rechargeable battery, the rechargeable battery can be a wired rechargeable battery or a wireless rechargeable battery. A wired rechargeable battery is a battery that is charged via a wired line, while a wireless rechargeable battery is a battery that is charged via a wireless coil. The rechargeable battery can also be used to support fast charging technology.

[0245] For example, when the processor 721 executes the machine-executable instructions, it controls the radio frequency circuit 724 to implement the following steps: receiving resource configuration information corresponding to a CSI-RS resource set sent by a base station, where the resource configuration information is used to indicate the CSI-RS resource set, and the CSI-RS resource set includes a CSI-RS resource located in an SBFD symbol; the CSI-RS resource exceeds the range of a downlink subband of the SBFD symbol, or the CSI-RS resource is located in the downlink subband of the SBFD symbol;

[0246] The CSI-RS sent by the base station is received based on the CSI-RS resources in the CSI-RS resource set.

[0247] Based on the same application concept as the above method, an example of the present application also provides a machine-readable storage medium, on which a number of computer instructions are stored. When the computer instructions are executed by a processor, the CSI-RS transmission method disclosed in the above example of the present application can be implemented.

[0248] The machine-readable storage medium may be any electronic, magnetic, optical, or other physical storage device that may contain or store information, such as executable instructions, data, and the like. For example, the machine-readable storage medium may be: RAM (Random Access Memory), volatile memory, non-volatile memory, flash memory, a storage drive (such as a hard disk drive), a solid-state drive, any type of storage disk (such as a CD, DVD, etc.), or similar storage media, or a combination thereof.

[0249] The systems, devices, modules, or units described in the above embodiments may be implemented by a computer entity or by a product having certain functions. A typical implementation device is a computer, which may be in the form of a personal computer, laptop computer, cellular phone, camera phone, smartphone, personal digital assistant, media player, navigation device, email transceiver, game console, tablet computer, wearable device, or any combination of these devices.

[0250] The foregoing is merely an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. A CSI-RS transmission method, characterized in that: Applied to user equipment, including: receiving resource configuration information corresponding to a CSI-RS resource set sent by a base station, wherein the resource configuration information is used to indicate a CSI-RS resource set, and the CSI-RS resource set includes a CSI-RS resource located in a SBFD symbol; the CSI-RS resource exceeds a range of a downlink subband of the SBFD symbol, or the CSI-RS resource is located in a downlink subband of the SBFD symbol; The CSI-RS sent by the base station is received based on the CSI-RS resources in the CSI-RS resource set.

2. The method according to claim 1, characterized in that: The resource configuration information includes first resource configuration information corresponding to a first CSI-RS resource set, the first resource configuration information is used to indicate a first CSI-RS resource set, the first CSI-RS resource set includes a first type of CSI-RS resource located in a normal symbol and a second type of CSI-RS resource located in a SBFD symbol, and the second type of CSI-RS resource is beyond the range of a downlink subband of the SBFD symbol; or, The resource configuration information includes second resource configuration information corresponding to the second CSI-RS resource set and third resource configuration information corresponding to the third CSI-RS resource set, the second resource configuration information is used to indicate the second CSI-RS resource set, and the third resource configuration information is used to indicate the third CSI-RS resource set; wherein, the second CSI-RS resource set includes a third type of CSI-RS resources located in a SBFD symbol, and the third type of CSI-RS resources are located in a downlink subband of the SBFD symbol, and the third CSI-RS resource set includes a fourth type of CSI-RS resources located in a normal symbol.

3. The method according to claim 2, characterized in that If the second-type CSI-RS resources include a first part of resources located in a downlink subband of a SBFD symbol and a second part of resources located in an uplink subband or a protection subband of a SBFD symbol, the receiving, based on the second-type CSI-RS resources in the first CSI-RS resource set, a CSI-RS sent by a base station includes: If downlink data transmission outside the downlink subband of the SBFD symbol is allowed, receiving the CSI-RS based on the first part of resources and the second part of resources of the second type of CSI-RS resources; Alternatively, if downlink data transmission outside the downlink subband of the SBFD symbol is not allowed, receiving CSI-RS based on the first part of resources and the second part of resources of the second type of CSI-RS resources is prohibited; or, receiving CSI-RS based on the first part of resources of the second type of CSI-RS resources, and receiving CSI-RS based on the second part of resources of the second type of CSI-RS resources is prohibited.

4. The method according to claim 3, characterized in that After receiving the CSI-RS based on the first part of the resources of the second type of CSI-RS resources and prohibiting receiving the CSI-RS based on the second part of the resources of the second type of CSI-RS resources, the method further includes: measuring the CSI-RS received by the first part of the resources of the second type of CSI-RS resources to obtain first channel state information, and sending the first channel state information to the base station; After the prohibition of receiving CSI-RS based on the first part of resources and the second part of resources of the second type of CSI-RS resources, the method also includes: performing measurements based on the CSI-RS that does not overlap with the uplink subband or the protection subband in the previous period, determining the measurement results as the channel state information of the current period, and sending the channel state information to the base station.

5. The method according to claim 4, characterized in that After receiving the CSI-RS sent by the base station based on the first type of CSI-RS resources in the first CSI-RS resource set, measure the CSI-RS received by the first type of CSI-RS resources to obtain second channel state information, and send the second channel state information to the base station; Among them, sending the first channel state information to the base station and sending the second channel state information to the base station includes: if the first channel state information includes multiple first L1-RSRPs and the second channel state information includes multiple second L1-RSRPs, selecting N first L1-RSRPs from the multiple first L1-RSRPs, and selecting N second L1-RSRPs from the multiple second L1-RSRPs, and sending the N first L1-RSRPs and the N second L1-RSRPs to the base station; or selecting 2N L1-RSRPs from the multiple first L1-RSRPs and the multiple second L1-RSRPs, and sending the 2N L1-RSRPs to the base station; and / or, If the first channel state information includes multiple first L1-SINRs and the second channel state information includes multiple second L1-SINRs, select N first L1-SINRs from the multiple first L1-SINRs, select N second L1-SINRs from the multiple second L1-SINRs, and send the N first L1-SINRs and the N second L1-SINRs to the base station; or select 2N L1-SINRs from the multiple first L1-SINRs and the multiple second L1-SINRs, and send the 2N L1-SINRs to the base station.

6. The method according to claim 4, characterized in that The measuring the CSI-RS received from the first part of the resources of the second type of CSI-RS resources to obtain the first channel state information includes: If the first part of the second type of CSI-RS resources corresponds to at least one CSI subband, for each CSI subband, if the CSI subband completely overlaps with an uplink subband or a guard subband of a SBFD symbol, measuring the CSI-RS received in the CSI subband is prohibited; If the CSI subband does not overlap with an uplink subband or a guard subband of the SBFD symbol, measuring a CSI-RS received by the CSI subband to obtain a measurement result of the CSI subband; If the CSI subband partially overlaps with the uplink subband or protection subband of the SBFD symbol, reception of the CSI subband is prohibited. or, determining whether to measure the CSI-RS received by the CSI subband according to the non-overlapping resource size of the CSI subband, and if so, measuring the CSI-RS received by the CSI subband to obtain the measurement result of the CSI subband; if not, prohibiting the measurement of the CSI-RS received by the CSI subband; The first channel state information is determined based on a measurement result of each CSI subband.

7. The method according to claim 6, characterized in that The method further comprises: receiving first indication information sent by the base station; wherein the first indication information is used to indicate prohibiting transmission of CSI-RS based on the first part of resources and the second part of resources of the second type of CSI-RS resources, or to indicate transmission of CSI-RS based on the first part of resources of the second type of CSI-RS resources and prohibiting transmission of CSI-RS based on the second part of resources of the second type of CSI-RS resources; If the first indication information is used to indicate the transmission of CSI-RS based on the first part of resources of the second type of CSI-RS resources, and prohibit the transmission of CSI-RS based on the second part of resources of the second type of CSI-RS resources, then the second indication information sent by the base station is received; wherein the second indication information is used to indicate the prohibition of measuring the CSI-RS received on the CSI subband overlapping with the uplink subband or the protection subband, or to indicate whether to measure the CSI-RS received on the CSI subband based on the non-overlapping resource size of the CSI subband.

8. The method according to claim 4, characterized in that After receiving the CSI-RS sent by the base station based on the first type of CSI-RS resources in the first CSI-RS resource set, measure the CSI-RS received by the first type of CSI-RS resources to obtain second channel state information, and send the second channel state information to the base station; The first channel state information and the second channel state information are sent to the base station through different uplink resources; or the first channel state information and the second channel state information are sent to the base station through the same uplink resource.

9. The method according to claim 2, characterized in that: The third type of CSI-RS resources only include resources located in the downlink subband of the SBFD symbol; wherein: If the third type of CSI-RS resources only occupy continuous resources of the downlink subband, the second resource configuration information includes the RB starting position and the number of RBs occupied corresponding to the continuous resources; If the third type of CSI-RS resources occupies two non-contiguous resources of the downlink subband, the second resource configuration information includes RB starting positions and RB occupied quantities corresponding to the two resources respectively.

10. The method according to claim 9, characterized in that The starting position of the RB corresponding to the third type of CSI-RS resources is an integer multiple of the first value, and the number of RBs occupied by the third type of CSI-RS resources is greater than or equal to the second value, and the number of RBs occupied by the third type of CSI-RS resources is an integer multiple of the first value; or, The starting position of the RB corresponding to the third type of CSI-RS resources is the starting position of the downlink subband of the SBFD symbol, and the number of RBs occupied by the third type of CSI-RS resources is an arbitrary value; If the capability parameter of the user equipment indicates the ability to support any RB starting position, the RB starting position corresponding to the third type of CSI-RS resource is the starting position of the downlink subband of the SBFD symbol, and the number of RBs occupied by the third type of CSI-RS resource is an arbitrary value; If the capability parameter of the user equipment indicates that it does not have the ability to support any RB starting position, the RB starting position corresponding to the third type of CSI-RS resources is an integer multiple of the first value, and the number of RB occupations corresponding to the third type of CSI-RS resources is greater than or equal to the second value, and the number of RB occupations corresponding to the third type of CSI-RS resources is an integer multiple of the first value.

11. The method according to any one of claims 1 to 10, characterized in that: The method further comprises: receiving third indication information sent by the base station, where the third indication information is used to indicate that downlink data transmission outside the downlink subband of the SBFD symbol is allowed, or is used to indicate that downlink data transmission outside the downlink subband of the SBFD symbol is not allowed; and / or, Fourth indication information sent by the base station is received, where the fourth indication information is used to indicate that uplink data transmission outside the uplink subband of the SBFD symbol is allowed, or is used to indicate that uplink data transmission outside the uplink subband of the SBFD symbol is not allowed.

12. A CSI-RS transmission method, characterized in that: Applied to base stations, including: Sending resource configuration information corresponding to a CSI-RS resource set to a user equipment, where the resource configuration information is used to indicate a CSI-RS resource set used by the user equipment, and the CSI-RS resource set includes a CSI-RS resource located in a SBFD symbol; the CSI-RS resource exceeds the range of a downlink subband of the SBFD symbol, or the CSI-RS resource is located in a downlink subband of the SBFD symbol; The CSI-RS is sent to the user equipment based on the CSI-RS resources in the CSI-RS resource set, so that the user equipment receives the CSI-RS based on the CSI-RS resources in the CSI-RS resource set.

13. The method according to claim 12, characterized in that The sending resource configuration information corresponding to the CSI-RS resource set to the user equipment includes: If the user equipment corresponds to the first CSI-RS resource set, first resource configuration information corresponding to the first CSI-RS resource set is sent to the user equipment; wherein the first CSI-RS resource set includes a first type of CSI-RS resource located in a common symbol and a second type of CSI-RS resource located in a SBFD symbol, and the second type of CSI-RS resource exceeds the downlink sub-signal of the SBFD symbol. The range of the belt; or If the user equipment corresponds to the second CSI-RS resource set and the third CSI-RS resource set, the second resource configuration information corresponding to the second CSI-RS resource set and the third resource configuration information corresponding to the third CSI-RS resource set are sent to the user equipment; wherein the second CSI-RS resource set includes a third type of CSI-RS resource located in a SBFD symbol, and the third type of CSI-RS resource is located in the downlink subband of the SBFD symbol, and the third CSI-RS resource set includes a fourth type of CSI-RS resource located in a normal symbol.

14. The method according to claim 13, characterized in that If the second-type CSI-RS resources include a first part of resources located in a downlink subband of a SBFD symbol and a second part of resources located in an uplink subband or a protection subband of a SBFD symbol, the sending a CSI-RS to the user equipment based on the second-type CSI-RS resources in the first CSI-RS resource set includes: If downlink data transmission outside the downlink subband of the SBFD symbol is allowed, sending the CSI-RS based on the first part of resources and the second part of resources of the second type of CSI-RS resources; Alternatively, if downlink data transmission outside the downlink subband of the SBFD symbol is not allowed, sending CSI-RS based on the first part of resources and the second part of resources of the second type of CSI-RS resources is prohibited; or, CSI-RS is sent based on the first part of resources of the second type of CSI-RS resources, and sending CSI-RS based on the second part of resources of the second type of CSI-RS resources is prohibited.

15. The method according to claim 14, characterized in that The method further comprises: Sending first indication information to the user equipment; wherein the first indication information is used to indicate prohibiting transmission of CSI-RS based on the first part of resources and the second part of resources of the second type of CSI-RS resources, or to indicate transmission of CSI-RS based on the first part of resources of the second type of CSI-RS resources and prohibiting transmission of CSI-RS based on the second part of resources of the second type of CSI-RS resources; If the first indication information is used to indicate the transmission of CSI-RS based on the first part of resources of the second type of CSI-RS resources, and prohibit the transmission of CSI-RS based on the second part of resources of the second type of CSI-RS resources, then the second indication information is sent to the user equipment; wherein the second indication information is used to indicate that the measurement of the CSI-RS received by the CSI subband overlapping with the uplink subband or the protection subband is prohibited, or to indicate whether to measure the CSI-RS received by the CSI subband based on the non-overlapping resource size of the CSI subband.

16. The method according to claim 13, characterized in that The third type of CSI-RS resources only include resources located in the downlink subband of the SBFD symbol; wherein: If the third type of CSI-RS resources only occupy continuous resources of the downlink subband, the second resource configuration information includes the RB starting position and the number of RBs occupied corresponding to the continuous resources; If the third type of CSI-RS resources occupies two non-contiguous resources of the downlink subband, the second resource configuration information includes RB starting positions and RB occupied quantities corresponding to the two resources respectively.

17. The method according to claim 16, characterized in that The starting position of the RB corresponding to the third type of CSI-RS resources is an integer multiple of the first value, and the number of RBs occupied by the third type of CSI-RS resources is greater than or equal to the second value, and the number of RBs occupied by the third type of CSI-RS resources is an integer multiple of the first value; or, The starting position of the RB corresponding to the third type of CSI-RS resources is the starting position of the downlink subband of the SBFD symbol, and the number of RBs occupied by the third type of CSI-RS resources is an arbitrary value; If the capability parameter of the user equipment indicates the ability to support any RB starting position, the RB starting position corresponding to the third type of CSI-RS resource is the starting position of the downlink subband of the SBFD symbol, and the number of RBs occupied by the third type of CSI-RS resource is an arbitrary value; If the capability parameter of the user equipment indicates that it does not have the ability to support any RB starting position, the RB starting position corresponding to the third type of CSI-RS resources is an integer multiple of the first value, and the number of RB occupations corresponding to the third type of CSI-RS resources is greater than or equal to the second value, and the number of RB occupations corresponding to the third type of CSI-RS resources is an integer multiple of the first value.

18. The method according to any one of claims 12 to 17, characterized in that: The method further comprises: Sending third indication information to the user equipment, wherein the third indication information is used to indicate that downlink data transmission outside the downlink subband of the SBFD symbol is allowed, or is used to indicate that downlink data transmission outside the downlink subband of the SBFD symbol is not allowed; and / or, Fourth indication information is sent to the user equipment, wherein the fourth indication information is used to indicate that uplink data transmission outside the uplink subband of the SBFD symbol is allowed, or is used to indicate that uplink data transmission outside the uplink subband of the SBFD symbol is not allowed.

19. The method according to claim 14, characterized in that The sending of CSI-RS based on the first part of resources of the second type of CSI-RS resources, and prohibiting the sending of CSI-RS based on the second part of resources of the second type of CSI-RS resources, includes: Determining the target transmit power based on the maximum transmit power of the second type of CSI-RS resources; or determining the target transmit power based on the maximum transmit power and resource ratio of the second type of CSI-RS resources, where the resource ratio is the resource ratio of the first part of resources to the second type of CSI-RS resources; Sending a CSI-RS based on the first part of resources at the target transmit power.

20. A CSI-RS transmission device, characterized in that: Applied to user equipment, including: A first receiving module is used to receive resource configuration information corresponding to a CSI-RS resource set sent by a base station, where the resource configuration information is used to indicate a CSI-RS resource set, and the CSI-RS resource set includes a CSI-RS resource located in a SBFD symbol; the CSI-RS resource exceeds the range of a downlink subband of the SBFD symbol, or the CSI-RS resource is located in a downlink subband of the SBFD symbol; The second receiving module is used to receive the CSI-RS sent by the base station based on the CSI-RS resources in the CSI-RS resource set.

21. The device according to claim 20, characterized in that The resource configuration information includes first resource configuration information corresponding to a first CSI-RS resource set, the first resource configuration information is used to indicate a first CSI-RS resource set, the first CSI-RS resource set includes a first type of CSI-RS resource located in a normal symbol and a second type of CSI-RS resource located in a SBFD symbol, and the second type of CSI-RS resource is beyond the range of a downlink subband of the SBFD symbol; or, The resource configuration information includes second resource configuration information corresponding to the second CSI-RS resource set and third resource configuration information corresponding to the third CSI-RS resource set, the second resource configuration information is used to indicate the second CSI-RS resource set, and the third resource configuration information is used to indicate the third CSI-RS resource set; wherein, the second CSI-RS resource set includes a third type of CSI-RS resources located in a SBFD symbol, and the third type of CSI-RS resources are located in a downlink subband of the SBFD symbol, and the third CSI-RS resource set includes a fourth type of CSI-RS resources located in a normal symbol.

22. The device according to claim 21, characterized in that If the second type of CSI-RS resources includes a first part of resources located in a downlink subband of a SBFD symbol and a second part of resources located in an uplink subband or a protection subband of a SBFD symbol, the second receiving module receives the CSI-RS sent by the base station based on the second type of CSI-RS resources in the first CSI-RS resource set, specifically for: If downlink data transmission outside the downlink subband of the SBFD symbol is allowed, receiving the CSI-RS based on the first part of resources and the second part of resources of the second type of CSI-RS resources; Alternatively, if downlink data transmission outside the downlink subband of the SBFD symbol is not allowed, receiving CSI-RS based on the first part of resources and the second part of resources of the second type of CSI-RS resources is prohibited; or, receiving CSI-RS based on the first part of resources of the second type of CSI-RS resources, and receiving CSI-RS based on the second part of resources of the second type of CSI-RS resources is prohibited.

23. The device according to claim 22, characterized in that Also includes: A sending module is used to measure the CSI-RS received by the first part of the resources of the second type of CSI-RS resources after receiving CSI-RS based on the first part of the resources of the second type of CSI-RS resources and prohibiting the reception of CSI-RS based on the second part of the resources of the second type of CSI-RS resources, obtain first channel state information, and send the first channel state information to the base station; after prohibiting the reception of CSI-RS based on the first part of the resources and the second part of the resources of the second type of CSI-RS resources, measure based on the CSI-RS that does not overlap with the uplink subband or the protection subband in the previous period, determine the measurement result as the channel state information of the current period, and send the channel state information to the base station.

24. The device according to claim 23, characterized in that The sending module is further configured to, after receiving the CSI-RS sent by the base station based on the first type of CSI-RS resources in the first CSI-RS resource set, measure the CSI-RS received by the first type of CSI-RS resources to obtain second channel state information, and send the second channel state information to the base station; Among them, when the sending module sends the first channel state information to the base station and sends the second channel state information to the base station, it is specifically used to: if the first channel state information includes multiple first L1-RSRPs and the second channel state information includes multiple second L1-RSRPs, then select N first L1-RSRPs from the multiple first L1-RSRPs, and select N second L1-RSRPs from the multiple second L1-RSRPs, and send the N first L1-RSRPs and the N second L1-RSRPs to the base station; or select 2N L1-RSRPs from the multiple first L1-RSRPs and the multiple second L1-RSRPs, and send the 2N L1-RSRPs to the base station; and / or, If the first channel state information includes multiple first L1-SINRs and the second channel state information includes multiple second L1-SINRs, select N first L1-SINRs from the multiple first L1-SINRs, select N second L1-SINRs from the multiple second L1-SINRs, and send the N first L1-SINRs and the N second L1-SINRs to the base station; or select 2N L1-SINRs from the multiple first L1-SINRs and the multiple second L1-SINRs, and send the 2N L1-SINRs to the base station.

25. The device according to claim 23, characterized in that The sending module measures the CSI-RS received by the first part of the second type of CSI-RS resources to obtain the first channel state information, which is specifically used for: If the first part of the second type of CSI-RS resources corresponds to at least one CSI subband, for each CSI subband, if the CSI subband completely overlaps with an uplink subband or a guard subband of a SBFD symbol, measuring the CSI-RS received in the CSI subband is prohibited; If the CSI subband does not overlap with an uplink subband or a guard subband of the SBFD symbol, measuring a CSI-RS received by the CSI subband to obtain a measurement result of the CSI subband; If the CSI subband partially overlaps with the uplink subband or the protection subband of the SBFD symbol, it is prohibited to measure the CSI-RS received by the CSI subband; or, determine whether to measure the CSI-RS received by the CSI subband according to the non-overlapping resource size of the CSI subband, and if so, measure the CSI-RS received by the CSI subband to obtain the measurement result of the CSI subband; if not, it is prohibited to measure the CSI-RS received by the CSI subband; The first channel state information is determined based on a measurement result of each CSI subband.

26. The device according to claim 25, characterized in that The first receiving module is further used to receive first indication information sent by the base station; wherein the first indication information is used to indicate prohibiting the transmission of CSI-RS based on the first part of resources and the second part of resources of the second type of CSI-RS resources, or to indicate the transmission of CSI-RS based on the first part of resources of the second type of CSI-RS resources, and prohibiting the transmission of CSI-RS based on the second part of resources of the second type of CSI-RS resources; If the first indication information is used to indicate transmission of CSI-RS based on a first part of resources of a second type of CSI-RS resources and prohibit transmission of CSI-RS based on a second part of resources of the second type of CSI-RS resources, the first receiving module is further used to receive second indication information sent by the base station; The second indication information is used to indicate that it is prohibited to measure the CSI-RS received on the CSI subband that overlaps with the uplink subband or the protection subband, or to indicate whether to measure the CSI-RS received on the CSI subband based on the non-overlapping resource size of the CSI subband.

27. The device according to claim 23, characterized in that The sending module is further configured to, after receiving the CSI-RS sent by the base station based on the first type of CSI-RS resources in the first CSI-RS resource set, measure the CSI-RS received by the first type of CSI-RS resources to obtain second channel state information, and send the second channel state information to the base station; The first channel state information and the second channel state information are sent to the base station through different uplink resources; or the first channel state information and the second channel state information are sent to the base station through the same uplink resource.

28. The device according to claim 21, characterized in that The third type of CSI-RS resources only include resources located in the downlink subband of the SBFD symbol; wherein: If the third type of CSI-RS resources only occupy continuous resources of the downlink subband, the second resource configuration information includes the RB starting position and the number of RBs occupied corresponding to the continuous resources; If the third type of CSI-RS resources occupies two non-contiguous resources of the downlink subband, the second resource configuration information includes RB starting positions and RB occupied quantities corresponding to the two resources respectively.

29. The device according to claim 28, characterized in that The starting position of the RB corresponding to the third type of CSI-RS resources is an integer multiple of the first value, and the number of RBs occupied by the third type of CSI-RS resources is greater than or equal to the second value, and the number of RBs occupied by the third type of CSI-RS resources is an integer multiple of the first value; or, The starting position of the RB corresponding to the third type of CSI-RS resources is the starting position of the downlink subband of the SBFD symbol, and the number of RBs occupied by the third type of CSI-RS resources is an arbitrary value; If the capability parameter of the user equipment indicates the ability to support any RB starting position, the RB starting position corresponding to the third type of CSI-RS resource is the starting position of the downlink subband of the SBFD symbol, and the number of RBs occupied by the third type of CSI-RS resource is an arbitrary value; If the capability parameter of the user equipment indicates that it does not have the ability to support any RB starting position, the RB starting position corresponding to the third type of CSI-RS resources is an integer multiple of the first value, and the number of RB occupations corresponding to the third type of CSI-RS resources is greater than or equal to the second value, and the number of RB occupations corresponding to the third type of CSI-RS resources is an integer multiple of the first value.

30. The device according to any one of claims 20 to 29, characterized in that The first receiving module is further used to receive third indication information sent by the base station, where the third indication information is used to indicate that downlink data transmission outside the downlink subband of the SBFD symbol is allowed, or is used to indicate that downlink data transmission outside the downlink subband of the SBFD symbol is not allowed; and / or, The first receiving module is further used to receive fourth indication information sent by the base station, and the fourth indication information is used to indicate that uplink data transmission outside the uplink subband of the SBFD symbol is allowed, or to indicate that uplink data transmission outside the uplink subband of the SBFD symbol is not allowed.

31. A CSI-RS transmission device, characterized in that: Applied to base stations, including: A first sending module, configured to send resource configuration information corresponding to a CSI-RS resource set to a user equipment, wherein the resource configuration information is used to indicate a CSI-RS resource set used by the user equipment, and the CSI-RS resource set includes a CSI-RS resource located in an SBFD symbol; the CSI-RS resource exceeds the range of a downlink subband of the SBFD symbol, or the CSI-RS resource is located in a downlink subband of the SBFD symbol; A second sending module is configured to send a CSI-RS to the user equipment based on the CSI-RS resources in the CSI-RS resource set, So that the user equipment receives the CSI-RS based on the CSI-RS resources in the CSI-RS resource set.

32. The device according to claim 31, characterized in that When the first sending module sends the resource configuration information corresponding to the CSI-RS resource set to the user equipment, it is specifically used to: If the user equipment corresponds to a first CSI-RS resource set, first resource configuration information corresponding to the first CSI-RS resource set is sent to the user equipment; wherein the first CSI-RS resource set includes a first type of CSI-RS resource located in a normal symbol and a second type of CSI-RS resource located in a SBFD symbol, and the second type of CSI-RS resource has exceeded the range of the downlink subband of the SBFD symbol; or, If the user equipment corresponds to the second CSI-RS resource set and the third CSI-RS resource set, the second resource configuration information corresponding to the second CSI-RS resource set and the third resource configuration information corresponding to the third CSI-RS resource set are sent to the user equipment; wherein the second CSI-RS resource set includes a third type of CSI-RS resource located in a SBFD symbol, and the third type of CSI-RS resource is located in the downlink subband of the SBFD symbol, and the third CSI-RS resource set includes a fourth type of CSI-RS resource located in a normal symbol.

33. The device according to claim 32, characterized in that If the second type of CSI-RS resources includes a first part of resources located in a downlink subband of a SBFD symbol and a second part of resources located in an uplink subband or a protection subband of a SBFD symbol, the second sending module sends the CSI-RS to the user equipment based on the second type of CSI-RS resources in the first CSI-RS resource set, specifically for: If downlink data transmission outside the downlink subband of the SBFD symbol is allowed, sending the CSI-RS based on the first part of resources and the second part of resources of the second type of CSI-RS resources; Alternatively, if downlink data transmission outside the downlink subband of the SBFD symbol is not allowed, sending CSI-RS based on the first part of resources and the second part of resources of the second type of CSI-RS resources is prohibited; or, CSI-RS is sent based on the first part of resources of the second type of CSI-RS resources, and sending CSI-RS based on the second part of resources of the second type of CSI-RS resources is prohibited.

34. The device according to claim 33, characterized in that The first sending module is further used to send first indication information to the user equipment; wherein the first indication information is used to indicate prohibiting the transmission of CSI-RS based on the first part of resources and the second part of resources of the second type of CSI-RS resources, or to indicate the transmission of CSI-RS based on the first part of resources of the second type of CSI-RS resources, and prohibiting the transmission of CSI-RS based on the second part of resources of the second type of CSI-RS resources; If the first indication information is used to indicate transmission of CSI-RS based on a first part of resources of the second type of CSI-RS resources, and prohibit transmission of CSI-RS based on a second part of resources of the second type of CSI-RS resources, the first sending module is further used to send second indication information to the user equipment; The second indication information is used to indicate that it is prohibited to measure the CSI-RS received on the CSI subband that overlaps with the uplink subband or the protection subband, or to indicate whether to measure the CSI-RS received on the CSI subband based on the non-overlapping resource size of the CSI subband.

35. The device according to claim 32, characterized in that The third type of CSI-RS resources only include resources located in the downlink subband of the SBFD symbol; wherein: If the third type of CSI-RS resources only occupy continuous resources of the downlink subband, the second resource configuration information includes the RB starting position and the number of RBs occupied corresponding to the continuous resources; If the third type of CSI-RS resources occupies two non-contiguous resources of the downlink subband, the second resource configuration information includes RB starting positions and RB occupied quantities corresponding to the two resources respectively.

36. The device according to claim 35, characterized in that The starting position of the RB corresponding to the third type of CSI-RS resources is an integer multiple of the first value, and the number of RBs occupied by the third type of CSI-RS resources is greater than or equal to the second value, and the number of RBs occupied by the third type of CSI-RS resources is an integer multiple of the first value; or, The starting position of the RB corresponding to the third type of CSI-RS resources is the starting position of the downlink subband of the SBFD symbol, and the number of RBs occupied by the third type of CSI-RS resources is an arbitrary value; If the capability parameter of the user equipment indicates the ability to support any RB starting position, the RB starting position corresponding to the third type of CSI-RS resource is the starting position of the downlink subband of the SBFD symbol, and the number of RBs occupied by the third type of CSI-RS resource is an arbitrary value; If the capability parameter of the user equipment indicates that it does not have the ability to support any RB starting position, the RB starting position corresponding to the third type of CSI-RS resources is an integer multiple of the first value, and the number of RB occupations corresponding to the third type of CSI-RS resources is greater than or equal to the second value, and the number of RB occupations corresponding to the third type of CSI-RS resources is an integer multiple of the first value.

37. The device according to any one of claims 31 to 36, characterized in that The first sending module is further used to send third indication information to the user equipment, wherein the third indication information is used to indicate that downlink data transmission outside the downlink subband of the SBFD symbol is allowed, or is used to indicate that downlink data transmission outside the downlink subband of the SBFD symbol is not allowed. Transmitting downlink data in addition to The first sending module is further used to send fourth indication information to the user equipment, wherein the fourth indication information is used to indicate that uplink data transmission outside the uplink subband of the SBFD symbol is allowed, or to indicate that uplink data transmission outside the uplink subband of the SBFD symbol is not allowed.

38. The device according to claim 33, characterized in that The second sending module sends the CSI-RS based on the first part of the second type of CSI-RS resources, and prohibits sending the CSI-RS based on the second part of the second type of CSI-RS resources, and is specifically used for: Determining the target transmit power based on the maximum transmit power of the second type of CSI-RS resources; or determining the target transmit power based on the maximum transmit power and resource ratio of the second type of CSI-RS resources, where the resource ratio is the resource ratio of the first part of resources to the second type of CSI-RS resources; Sending a CSI-RS based on the first part of resources at the target transmit power.

39. A user equipment, characterized in that: include: a processor and a machine-readable storage medium storing machine-executable instructions executable by the processor; The processor is used to execute machine executable instructions to implement the method described in any one of claims 1-11.

40. A base station, characterized in that: include: a processor and a machine-readable storage medium storing machine-executable instructions executable by the processor; The processor is used to execute machine executable instructions to implement the method described in any one of claims 12-19.

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