CSI-RS transmission method, device and equipment

Abstract

The present invention provides a CSI-RS transmission method, apparatus, and device. The method includes receiving resource configuration information corresponding to a CSI-RS resource set transmitted from a base station, receiving the CSI-RS transmitted from the base station based on CSI-RS resources in the CSI-RS resource set, measuring the received CSI-RS, and reporting the measurement result to the base station. Here, the resource configuration information is information for indicating a CSI-RS resource set, and the CSI-RS resource set includes CSI-RS resources located in an SBFD symbol, and the CSI-RS resources are located beyond the downlink subband of the SBFD symbol or within the downlink subband of the SBFD symbol. This scheme can improve resource utilization.

Description

[Technical Field]

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

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

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

[0004] A TDD system may be operated in HD (Half Duplex) mode, ie, the same frequency domain resource is only used for either UL or DL ​​at the same time. Summary of the Invention [Means for solving the problem]

[0005] The present invention provides a channel state information reference signal (CSI-RS) transmission method applied to a user equipment, the method comprising: receiving resource configuration information corresponding to a CSI-RS resource set transmitted from a base station; receiving a CSI-RS transmitted from the base station based on the CSI-RS resources in the CSI-RS resource set; Here, the resource configuration information is information for indicating the CSI-RS resource set, the CSI-RS resource set includes CSI-RS resources located in a subband full duplex (SBFD) symbol, and the CSI-RS resources are located beyond the range of a downlink subband of the SBFD symbol or within the downlink subband of the SBFD symbol.

[0006] The present invention provides a CSI-RS transmission method applied to a base station, the method comprising: transmitting resource configuration information corresponding to the CSI-RS resource set to a user equipment; transmitting a CSI-RS to the user equipment based on CSI-RS resources in the CSI-RS resource set, thereby causing the user equipment to receive a CSI-RS based on CSI-RS resources in the CSI-RS resource set; Here, the resource configuration information is information for indicating a CSI-RS resource set to be used by the user equipment, the CSI-RS resource set includes CSI-RS resources located in an SBFD symbol, and the CSI-RS resources are located beyond the range of a downlink subband of the SBFD symbol or within the downlink subband of the SBFD symbol.

[0007] The present invention provides a CSI-RS transmission device applied to a user equipment, the device comprising: a first receiving module configured to receive resource configuration information corresponding to a CSI-RS resource set transmitted from a base station; a second receiving module configured to receive a CSI-RS transmitted from the base station based on the CSI-RS resources in the CSI-RS resource set; Here, the resource configuration information is information for indicating the CSI-RS resource set, the CSI-RS resource set includes CSI-RS resources located in an SBFD symbol, and the CSI-RS resources are located beyond the range of the downlink subband of the SBFD symbol or within the downlink subband of the SBFD symbol.

[0008] The present invention provides a CSI-RS transmission device applied to a base station, the device comprising: a first transmitting module configured to transmit resource configuration information corresponding to a CSI-RS resource set to a user equipment; a second transmission module configured to transmit a CSI-RS to the user equipment based on CSI-RS resources in the CSI-RS resource set, thereby causing the user equipment to receive a CSI-RS based on the CSI-RS resources in the CSI-RS resource set; Here, the resource configuration information is information for indicating a CSI-RS resource set to be used by the user equipment, the CSI-RS resource set includes CSI-RS resources located in an SBFD symbol, and the CSI-RS resources are located beyond the range of a downlink subband of the SBFD symbol or within the downlink subband of the SBFD symbol.

[0009] The present invention provides a user equipment comprising a processor and a machine-readable storage medium having machine-executable instructions stored thereon that are executable by the processor, the processor being configured to implement the above-mentioned CSI-RS transmission method by executing the machine-executable instructions.

[0010] The present invention provides a base station comprising a processor and a machine-readable storage medium having machine-executable instructions stored thereon that are executable by the processor, the processor being configured to implement the above-mentioned CSI-RS transmission method by executing the machine-executable instructions. [Effects of the Invention]

[0011] As can be seen from the above technical solution, a User Equipment (UE) receives a Channel State Information Reference Signal (CSI-RS) using CSI-RS resources in a CSI-RS resource set, and a base station transmits a CSI-RS using CSI-RS resources in a CSI-RS resource set. When sub-band full duplex (SBFD) time-frequency resources overlap with CSI-RS resources, CSI-RS transmission can be performed using SBFD time-frequency resources. This improves the reliability of downlink data transmission, increases the cell coverage radius, reduces uplink / downlink interference caused by the introduction of SBFD time-frequency resources, and enables the effective integration and implementation of SBFD time-frequency resource configuration and CSI-RS transmission mechanisms. From a system-wide perspective, this enables support for CSI-RS transmission in a TDD system, improves resource utilization, enhances network coverage and capacity, increases downlink transmission resources, reduces downlink transmission delay, and increases downlink transmission capacity. [Brief explanation of the drawings]

[0012] [Figure 1A] 1 is a flow diagram of a CSI-RS transmission method according to one embodiment; [Figure 1B] 1 is a flow diagram of a CSI-RS transmission method according to one embodiment; [Figure 2]FIG. 1 is a schematic diagram of SBFD time-frequency resources in one embodiment. [Figure 3] FIG. 10 is a schematic diagram of a CSI-RS resource set configured for SBFD symbols and normal symbols in one embodiment. [Figure 4] FIG. 10 is a schematic diagram illustrating a case where CSI subbands and UL subbands are not aligned in one embodiment. [Figure 5] FIG. 10 is a schematic diagram of a CSI-RS resource set configured for an SBFD symbol in one embodiment. [Figure 6A] FIG. 1 is a schematic diagram illustrating the configuration of a CSI-RS transmission device according to an embodiment. [Figure 6B] FIG. 1 is a schematic diagram illustrating the configuration of a CSI-RS transmission device according to an embodiment. [Figure 7A] FIG. 1 is a schematic diagram of a user device according to an embodiment. [Figure 7B] FIG. 2 is a schematic diagram illustrating the configuration of a base station according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0013] The terms used in the embodiments of the present invention are not intended to limit the present invention but merely to describe specific embodiments. As used in the embodiments and claims of the present invention, the singular forms "a," "the," and "said" are also intended to include the plural form unless the context clearly indicates otherwise. Also, as used herein, the term "and / or" should be understood to mean any and all possible combinations including one or more of the associated listed items.

[0014] In embodiments of the present invention, terms such as first, second, and third may be used to describe various pieces of information, but it should be understood that these pieces of information should not be limited to these terms. These terms are used only to distinguish between pieces of information of the same type. For example, first information may be referred to as second information, and similarly, second information may be referred to as first information, without departing from the scope of the present invention. Furthermore, depending on the context, the word "if" may be interpreted as "when," "when," or "depending on determining that."

[0015] A TDD system can operate in HD (Half Duplex) mode, i.e., the same frequency domain resource is used for either UL or DL ​​at the same time. To use frequency domain resources more flexibly and improve resource utilization, a TDD system can also operate in FD (Full-Duplex) mode, i.e., the same frequency domain resource is used for both UL and DL at the same time. That is, uplink data and downlink data are processed simultaneously via the same frequency domain resource.

[0016] In a TDD system, the frame structure is divided into DL slots, UL slots, and flexible slots. Once the frame structure is determined, the UE can transmit and receive data based on the frame structure. For UEs using HD mode, the base station (e.g., gNB) schedules the UE for transmission or reception based on the frame structure. For UEs using FD mode, the base station schedules the UE for transmission, reception, or simultaneous transmission and reception based on the frame structure. As described above, the base station configures the frame structure and notifies the UE of the frame structure, allowing the UE to recognize the frame structure and achieve accurate data transmission and reception. From another perspective, by recognizing the frame structure, the UE can predict potential interference between UEs and employ interference cancellation techniques to mitigate the interference and improve communication reliability.

[0017] In one embodiment, in a TDD system, a frame structure mainly for uplink transmission typically has many UL slots and fewer DL slots, which limits the downlink transmission rate and increases the downlink data transmission delay, resulting in disadvantages to downlink services.

[0018] One embodiment of the present invention provides a CSI-RS transmission method. The method utilizes SBFD time-frequency resources to configure flexible downlink frequency domain resources and uplink frequency domain resources for a UE, and transmits uplink data via the uplink frequency domain resources. That is, uplink frequency domain resources can be configured in downlink slots or flexible slots, and uplink data can be transmitted via the uplink frequency domain resources. This can improve the uplink transmission rate and reduce the uplink data transmission delay. Also, downlink frequency domain resources can be configured in uplink slots or flexible slots, and downlink data can be transmitted via the downlink frequency domain resources. This can improve the downlink transmission rate and reduce the downlink data transmission delay.

[0019] In one embodiment of the present invention, a CSI-RS transmission method applied to a user equipment is provided. As shown in Figure 1A, there is shown a flow diagram of the CSI-RS transmission method, which may include steps 111 to 112.

[0020] In step 111, resource configuration information corresponding to a CSI-RS resource set transmitted from a base station is received, where the resource configuration information is information for indicating a CSI-RS resource set, the CSI-RS resource set includes CSI-RS resources located in an SBFD symbol, and the CSI-RS resources are located beyond the range of a downlink subband of the SBFD symbol or within the downlink subband of the SBFD symbol.

[0021] In step 112, receive the CSI-RS transmitted from the base station based on the CSI-RS resources in the CSI-RS resource set.

[0022] In one embodiment of the present invention, a CSI-RS transmission method applied to a base station is provided. As shown in Figure 1B, there is shown a flow diagram of the CSI-RS transmission method, which may include steps 121 to 122.

[0023] In step 121, resource configuration information corresponding to the CSI-RS resource set is sent to the user equipment, where the resource configuration information is information for indicating the CSI-RS resource set to be used by the user equipment, the CSI-RS resource set includes CSI-RS resources located in the SBFD symbol, and the CSI-RS resources are beyond the downlink subband of the SBFD symbol or located within the downlink subband of the SBFD symbol.

[0024] In step 122, the CSI-RS is transmitted to the user equipment based on the CSI-RS resources in the CSI-RS resource set, thereby causing the user equipment to receive the CSI-RS based on the CSI-RS resources in the CSI-RS resource set.

[0025] In one embodiment, the CSI-RS resource is a CSI-RS time-frequency resource, and the following description will exemplify the CSI-RS resource.

[0026] In one embodiment, if the user equipment is compatible with a first CSI-RS resource set, the base station transmits first resource configuration information corresponding to the first CSI-RS resource set to the user equipment. The first resource configuration information is used to indicate the first CSI-RS resource set. Here, the first CSI-RS resource set includes first-type CSI-RS resources located in normal symbols and second-type CSI-RS resources located in SBFD symbols, where the second-type CSI-RS resources extend beyond the downlink subband of the SBFD symbol. The second-type CSI-RS resources extending beyond the downlink subband of the SBFD symbol means that the second-type CSI-RS resources include a first partial resource located in the downlink subband of the SBFD symbol and a second partial resource located in the uplink subband or guard band of the SBFD symbol.

[0027] In one embodiment, when the user equipment supports the second CSI-RS resource set and the third CSI-RS resource set, the base station transmits to the user equipment 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, where the second resource configuration information is information for indicating the second CSI-RS resource set, and the third resource configuration information is used to indicate the third CSI-RS resource set, where the second CSI-RS resource set includes a third-type CSI-RS resource located in an SBFD symbol, the third-type CSI-RS resource is located within the downlink subband of the SBFD symbol (i.e., the third-type CSI-RS resource does not exceed the range of the downlink subband of the SBFD symbol), and the third-type CSI-RS resource set includes a fourth-type CSI-RS resource located in a normal symbol.

[0028] In one embodiment, when the second-type CSI-RS resources include a first partial resource located in a downlink subband of an SBFD symbol and a second partial resource located in an uplink subband or a guard band of the SBFD symbol, if downlink data transmission outside the downlink subband of the SBFD symbol is permitted, the base station transmits the CSI-RS to the user equipment based on the first and second partial resources of the second-type CSI-RS resources. The user equipment receives the CSI-RS transmitted from the base station based on the first and second partial resources of the second-type CSI-RS resources.

[0029] Alternatively, if downlink data transmission outside the downlink subband of the SBFD symbol is not permitted, the base station prohibits transmission of CSI-RS to the user equipment based on the first and second partial resources of the CSI-RS resources of the second type. The user equipment prohibits reception of CSI-RS based on the first and second partial resources of the CSI-RS resources of the second type. Alternatively, the base station transmits CSI-RS based on the first partial resource of the CSI-RS resources of the second type and prohibits transmission of CSI-RS based on the second partial resource of the CSI-RS resources of the second type. The user equipment receives CSI-RS based on the first partial resource of the CSI-RS resources of the second type and prohibits reception of CSI-RS based on the second partial resource of the CSI-RS resources of the second type.

[0030] In one embodiment, after receiving a CSI-RS based on a first partial resource of the second type of CSI-RS resource and prohibiting reception of a CSI-RS based on a second partial resource of the second type of CSI-RS resource, the user equipment may measure the CSI-RS received in the first partial resource of the second type of CSI-RS resource to obtain first channel state information, and transmit the first channel state information to the base station.

[0031] In one embodiment, after prohibiting reception of CSI-RS based on the first partial resource and the second partial resource of the second type CSI-RS resource, the user equipment may perform measurements based on CSI-RS that do not overlap with the uplink subband or guard band in the previous period, determine the measurement result as channel state information for the current period, and transmit the channel state information to the base station.

[0032] In one embodiment, after receiving a CSI-RS transmitted from a base station based on a first type of CSI-RS resource in a first CSI-RS resource set, the user equipment may measure the CSI-RS received on the first type of CSI-RS resource to obtain second channel state information, and transmit the second channel state information to the base station.

[0033] Here, transmitting the first channel state information to the base station and transmitting the second channel state information to the base station includes, when the first channel state information includes a plurality of first Layer 1 reference signal received powers (L1-RSRPs) and the second channel state information includes a plurality of second L1-RSRPs, selecting N first L1-RSRPs from the plurality of first L1-RSRPs and selecting N second L1-RSRPs from the plurality of second L1-RSRPs and transmitting the N first L1-RSRPs and the N second L1-RSRPs to the base station, or selecting 2N L1-RSRPs from the plurality of first L1-RSRPs and the plurality of second L1-RSRPs and transmitting the 2N L1-RSRPs to the base station.

[0034] and / or, when the first channel state information includes a plurality of first Layer 1 signal-to-interference-and-noise ratios (L1-SINRs) and the second channel state information includes a plurality of second L1-SINRs, selecting N first L1-SINRs from the plurality of first L1-SINRs and selecting N second L1-SINRs from the plurality of second L1-SINRs, and sending the N first L1-SINRs and the N second L1-SINRs to the base station; or selecting 2N L1-SINRs from the plurality of first L1-SINRs and the plurality of second L1-SINRs, and sending the 2N L1-SINRs to the base station.

[0035] In one embodiment, the user equipment measuring the CSI-RS received in the first partial resource of the second-type CSI-RS resource to obtain first channel state information may include the following operations (a) to (b): (a) when the first partial resource of the second-type CSI-RS resource corresponds to at least one CSI subband, for each CSI subband, prohibiting measurement of the CSI-RS received in the CSI subband if the CSI subband completely overlaps with an uplink subband or a guard band of an SBFD symbol.

[0036] If the CSI subband does not overlap with the uplink subband or guard band of the SBFD symbol, the CSI-RS received in the CSI subband is measured to obtain the measurement result for the CSI subband.

[0037] If a CSI subband partially overlaps with an uplink subband or guard band of an SBFD symbol, measurement of the CSI-RS received in the CSI subband is prohibited, or whether to measure the CSI-RS received in the CSI subband is determined based on the size of the non-overlapping resources of the CSI subband, and if measurement is to be performed, the CSI-RS received in the CSI subband is measured to obtain a measurement result for the CSI subband; if measurement is not performed, measurement of the CSI-RS received in the CSI subband is prohibited.

[0038] (b) determining first channel state information based on measurement results for each CSI subband;

[0039] In one embodiment, the base station may transmit first indication information to the user equipment, and the user equipment may receive the first indication information, the first indication information being used to indicate prohibiting transmission of CSI-RS based on the first partial resources and the second partial resources of the CSI-RS resources of the second type, or to indicate transmitting CSI-RS based on the first partial resources of the CSI-RS resources of the second type and prohibiting transmission of CSI-RS based on the second partial resources of the CSI-RS resources of the second type.

[0040] If the first indication information instructs transmitting the CSI-RS based on a first partial resource of the second type of CSI-RS resources and prohibiting transmission of the CSI-RS based on a second partial resource of the second type of CSI-RS resources, the base station may transmit second indication information to the user equipment, and the user equipment may receive the second indication information, where the second indication information is used to instruct prohibiting measurement of the CSI-RS received in CSI subbands that overlap with an uplink subband or a guard band, or to instruct determining whether to measure the CSI-RS received in a CSI subband based on the size of the non-overlapping resources of the CSI subbands.

[0041] In one embodiment, after receiving a CSI-RS transmitted from a base station based on a first type of CSI-RS resource, the user equipment may measure the CSI-RS received on the first type of CSI-RS resource to obtain second channel state information, and transmit the second channel state information to the base station, where the first channel state information and the second channel state information are transmitted to the base station via different uplink resources or the same uplink resource.

[0042] In one embodiment, for a base station and a user device, the third type CSI-RS resource includes only resources located within the downlink subband of the SBFD symbol, and if the third type CSI-RS resource occupies only consecutive resources of the downlink subband, the second resource configuration information includes the RB starting position and the RB occupancy number corresponding to the consecutive resources, and if the third type CSI-RS resource occupies two non-consecutive resources of the downlink subband, the second resource configuration information includes the RB starting position and the RB occupancy number corresponding to each of the two resources.

[0043] The RB starting position corresponding to the third type CSI-RS resource may be an integer multiple of a first value (e.g., 4), and the number of occupied RBs corresponding to the third type CSI-RS resource may be equal to or greater than a second value (e.g., 24), and the number of occupied RBs corresponding to the third type CSI-RS resource may be an integer multiple of the first value.

[0044] Alternatively, the RB start position corresponding to the third type CSI-RS resource is the start position of the downlink subband of the SBFD symbol, and the number of occupied RBs corresponding to the third type CSI-RS resource is an arbitrary value.

[0045] Here, if the user equipment capability parameter indicates that it is capable of supporting arbitrary RB starting positions, the RB starting positions corresponding to the CSI-RS resources of the third type are starting positions of downlink subbands of SBFD symbols, and the RB occupation numbers corresponding to the CSI-RS resources of the third type are arbitrary values. If the user equipment capability parameter indicates that it is not capable of supporting arbitrary RB starting positions, the RB starting positions corresponding to the CSI-RS resources of the third type are integer multiples of a first value, and the RB occupation numbers corresponding to the CSI-RS resources of the third type are equal to or greater than a second value, and the RB occupation numbers corresponding to the CSI-RS resources of the third type are integer multiples of the first value.

[0046] In one embodiment, the base station may transmit third indication information to the user equipment, and the user equipment may receive the third indication information, where the third indication information is used to indicate that downlink data transmission outside the downlink subband of the SBFD symbol is permitted or to indicate that downlink data transmission outside the downlink subband of the SBFD symbol is not permitted.

[0047] And / or, the base station may transmit fourth indication information to the user equipment, and the user equipment may receive the fourth indication information, where the fourth indication information is used to indicate that uplink data transmission outside the uplink subband of the SBFD symbol is permitted or to indicate that uplink data transmission outside the uplink subband of the SBFD symbol is not permitted.

[0048] The base station transmitting the CSI-RS based on the first partial resources of the CSI-RS resources of the second type and prohibiting transmission of the CSI-RS based on the second partial resources of the CSI-RS resources of the second type may include determining a target transmission power based on a maximum transmission power of the CSI-RS resources of the second type, or determining a target transmission power based on the maximum transmission power of the CSI-RS resources of the second type and a resource ratio, and transmitting the CSI-RS based on the first partial resources under the target transmission power, where the resource ratio is a resource ratio between the first partial resources and the CSI-RS resources of the second type.

[0049] As can be seen from the above technical solution, the UE receives CSI-RS using the CSI-RS resources in the CSI-RS resource set, and the base station transmits CSI-RS using the CSI-RS resources in the CSI-RS resource set. When SBFD time-frequency resources and CSI-RS resources overlap, CSI-RS transmission using SBFD time-frequency resources is possible. This improves the reliability of downlink data transmission, increases the cell coverage radius, reduces uplink / downlink interference caused by the introduction of SBFD time-frequency resources, and effectively integrates and implements SBFD time-frequency resource configuration and CSI-RS transmission mechanisms. From a system-wide perspective, this enables CSI-RS transmission in TDD systems, improves resource utilization, enhances network coverage and capacity, increases downlink transmission resources, reduces downlink transmission delay, and increases downlink transmission capacity.

[0050] The above technical solution of the present invention will be described below with reference to examples.

[0051] In a TDD system, the frame structure is classified into UL slots, DL slots, and flexible slots according to the slots. Symbols in a flexible slot may be set to UL symbols, DL symbols, and F (Flexible) symbols. The F symbol can be used for UL, DL, or GP. Here, uplink data may be transmitted in a UL slot, or in a UL symbol or F symbol in a flexible slot. Uplink data cannot be transmitted in a DL slot, nor can it be transmitted in a DL symbol in a flexible slot. Similarly, downlink data may be transmitted in a DL slot, or in a DL symbol or F symbol in a flexible slot. Downlink data cannot be transmitted in a UL slot, nor can it be transmitted in a UL symbol in a flexible slot.

[0052] Full-duplex communication may be achieved using the SBFD scheme, i.e., SBFD time-frequency resources are configured in time-frequency resources (e.g., UL slots, DL slots, and flexible slots). This allows data transmission in a different direction from other time-frequency resources at the same time using the SBFD time-frequency resources. For example, by configuring the SBFD time-frequency resources in the DL slots and transmitting uplink data via the SBFD time-frequency resources, the uplink data is transmitted in the DL slots. By configuring the SBFD time-frequency resources in the DL symbols of the flexible slots and transmitting uplink data via the SBFD time-frequency resources, the uplink data is transmitted in the DL symbols of the flexible slots. By configuring the SBFD time-frequency resources in the UL slots and transmitting downlink data via the SBFD time-frequency resources, the downlink data is transmitted in the UL slots. By configuring the SBFD time-frequency resources in the UL symbols of the flexible slots and transmitting downlink data via the SBFD time-frequency resources, the downlink data is transmitted in the UL symbols of the flexible slots.

[0053] In one embodiment, the SBFD time-frequency resources (also referred to as subband time-frequency resources) may be time-frequency resources in an SBFD slot or time-frequency resources in an SBFD symbol. The SBFD symbols may be defined as symbols for which SBFD subbands can be configured for the base station and the UE. In the SBFD subbands (referred to as SBFD time-frequency resources) of these SBFD symbols, the base station and the UE may perform full-duplex communication. That is, uplink transmission, downlink transmission, or simultaneous uplink / downlink transmission can be performed in the SBFD time-frequency resources.

[0054] Here, the SBFD time-frequency resource can be explicitly designated as uplink, downlink, or flexible. If the SBFD time-frequency resource is designated as flexible, uplink or downlink scheduling can be performed via the SBFD time-frequency resource. If the SBFD time-frequency resource is not explicitly designated, it means flexible and can be used for uplink or downlink data transmission. The SBFD symbol configuration may include the symbol to be used for SBFD transmission among symbols in the DL slot, UL slot, and flexible slot, the implementation period, the starting point, etc. For convenience of explanation, the following embodiments will describe a case where the SBFD time-frequency resource is a time-frequency resource corresponding to the SBFD slot.

[0055] In one embodiment, SBFD designated as uplink is referred to as UL-SBFD, i.e., SBFD time-frequency resources are used for uplink. SBFD designated as downlink is referred to as DL-SBFD, i.e., SBFD time-frequency resources are used for downlink. To support FD communication, SBFD time-frequency resources may be configured in either a semi-static manner (e.g., configured by RRC (Radio Resource Control) signaling) or a dynamic manner (e.g., configured by DCI (Downlink Control Information)).

[0056] The SBFD time-frequency resource may be configured as a DL symbol, a flexible symbol, or an UL symbol. A symbol configured with the SBFD time-frequency resource is called an SBFD symbol, and a symbol configured without the SBFD time-frequency resource is called a normal symbol. That is, non-SBFD symbols such as an UL symbol, a DL symbol, or a flexible symbol are called normal symbols. SBFD may be configured for some symbols in a slot. That is, within a slot, some symbols are configured as SBFD symbols, and the rest are normal symbols. This allows DL or UL data transmission to span normal symbols or SBFD symbols. A slot configured with the SBFD time-frequency resource (e.g., an UL slot, a DL slot, or a flexible slot) may be called an SBFD slot, and a symbol configured with the SBFD time-frequency resource may be called an SBFD symbol.

[0057] In one embodiment, the CSI-RS is a type of reference signal, and is used for time / frequency tracking, CSI (Channel State Information) calculation, L1-RSRP (Reference Signal Receiving Power) calculation, L1-SINR (Signal Interference Noise Ratio) calculation, mobility management, etc. Technologies such as MIMO (Multiple Input Multiple Output) and beamforming are all realized based on the CSI-RS.

[0058] CSI is a general term for information reflecting a channel state obtained by a UE performing measurements based on the CSI-RS, and includes, 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 policy and transmission scheme based on the CSI fed back from the UE to improve the overall performance of the communication system.

[0059] The CSI-RS is used for functions such as time / frequency tracking, CSI measurement, beam refinement and management, interference measurement, and mobility management, and its parameters are configured by higher layer signaling. Regarding the CSI-RS used for time / frequency tracking, in Frequency Range 1 (FR1), the main features of the CSI-RS are as follows: The NZP-CSI-RS-Resource Set is composed of four periodic non-zero power CSI-RS (nzp-CSI-RS) resources, and the parameter trs-Info is configured for this resource set. These four CSI-RS resources are allocated to two consecutive slots, with two CSI-RS resources mapped to each slot, and the time domain interval is a fixed four symbols (l∈{4, 8}, l∈{5, 9}, or l∈{6, 10} for frequency range 1). Each CSI-RS resource is one port and has a frequency domain density of 3, i.e., it occupies three REs (Resource Elements) in one RB (Resource Block). The bandwidth is equal to min{52, BWP size} or the size of the BWP (Bandwidth Part).

[0060] In FR2 (Frequency Range 2), the main features of CSI-RS are as follows: An NZP-CSI-RS-ResourceSet consists of two periodic nzp-CSI-RS resources, and these two CSI-RS resources are allocated to one slot. Alternatively, an NZP-CSI-RS-ResourceSet consists of four periodic nzp-CSI-RS resources, and these four CSI-RS resources are allocated to two consecutive slots. Two CSI-RS resources are mapped to each slot, and the time-domain interval 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, and the frequency-domain density is three. The bandwidth is equal to min{52, BWP size}, or the size of the BWP.

[0061] The CSI-RS resources used for functions such as CSI measurement, beam refinement and management, mobility management, and interference measurement have the following main features: In the time domain, they may be configured to use up to four symbols, and their location within one slot may be arbitrary. They may be configured as periodic, aperiodic, or semi-persistent, and for aperiodic and semi-persistent CSI-RS, they are activated by MAC CE or DCI. In the frequency domain, they occupy a minimum of 24 PRBs (Physical Resource Blocks) and can be configured up to the BWP size. The density in the frequency domain may be set to values ​​such as 0.5, 1, or 3. The number of ports for each CSI-RS resource can be set to 1, 2, 4, 8, 16, or 32 depending on the application.

[0062] For CSI-RS resources used for functions such as CSI measurement, beam refinement and management, mobility management, and interference measurement, the UE measures the CSI-RS to obtain CSI results, and reports the CSI results to the base station via uplink control information (UCI). Based on this, the base station performs overall scheduling. Each CSI report corresponds to a CSI-RS resource, and the contents of the CSI report include, but are not limited to, a CSI-RS resource indication, a rank indication, a layer indication, CQI, PMI, L1-RSRP, and L1-SINR. The contents of each report vary depending on the application and higher layer signaling configuration. The type of CSI reporting may be configured as periodic, aperiodic, or semi-persistent. Aperiodic and semi-persistent CSI reporting may be triggered by DCI.

[0063] In one embodiment, a base station transmits CSI-RS to a UE, and the UE transmits CSI to the base station. Regarding the CSI-RS and CSI transmission process, a CSI-RS resource scheduling method and a CSI reporting method are provided in TDD full-duplex mode. When transmitting CSI-RS on SBFD time-frequency resources, an overlap situation between the CSI-RS resource and the UL subband (uplink subband) is considered, and an appropriate transmission policy is selected to transmit CSI-RS on the corresponding time-frequency resource. Because different types of CSI-RS resource configurations are different, different transmission policies may be selected for different types of CSI-RS resources, and corresponding CSI reporting methods may be provided for the different transmission policies. By providing a CSI reporting method on SBFD time-frequency resources, a CSI-RS power control method on SBFD time-frequency resources is provided, which is compatible with the CSI-RS transmission policy. By defining the CSI-RS transmission policy, CSI reporting method, and CSI-RS power control method on SBFD time-frequency resources, the uplink / downlink transmission efficiency of SBFD time-frequency resources can be improved, thereby improving the overall performance of the communication system.

[0064] First, data transmission control in SBFD symbols will be described.

[0065] For a half-duplex UE that supports SBFD functionality, the UE can know the configuration regarding SBFD time-frequency resources, but the UE can only receive DL data or transmit UL data at the same time (symbol).

[0066] A base station configures SBFD time-frequency resources for half-duplex UEs that support the SBFD function. The SBFD time-frequency resources are configured for the UE in DL slots or DL ​​symbols, and are used to transmit UL data, i.e., the SBFD time-frequency resources include UL subbands (uplink subbands). The DL symbols configured with the SBFD time-frequency resources become SBFD symbols, and the portions of the SBFD symbols other than the UL subbands become DL subbands (downlink subbands) and guard bandwidths (also called guard bands). The guard bandwidths are located between the UL subbands and DL subbands.

[0067] An SBFD time-frequency resource is configured for a UE in an UL slot or UL symbol, and the SBFD time-frequency resource is used for DL ​​data transmission, i.e., the SBFD time-frequency resource becomes a DL subband. A UL symbol configured with the SBFD time-frequency resource becomes an SBFD symbol, and the portion of the SBFD symbol other than the DL subband becomes a UL subband and a guard band. An SBFD time-frequency resource is configured for a UE in an F symbol, and the SBFD time-frequency resource is used for DL ​​data (or UL data) transmission, i.e., the SBFD time-frequency resource becomes a DL subband (or a UL subband). A F symbol configured with the SBFD time-frequency resource becomes an SBFD symbol, and the portion of the SBFD symbol other than the DL subband (or UL subband) becomes a UL subband and a guard band (or a DL subband and a guard band).

[0068] 2 is a schematic diagram of SBFD time-frequency resources. A base station configures SBFD time-frequency resources for a UE in a DL slot or DL ​​symbol. The SBFD time-frequency resources are UL subbands, the parts other than the UL subbands are DL subbands, and the black parts between the UL subbands and the DL subbands are guard bands.

[0069] The base station may configure the SBFD time-frequency resources semi-statically or dynamically, for example, by TDD-UL-DL-ConfigCommon signaling (TDD uplink-downlink common configuration) or TDD-UL-DL-ConfigDedicated signaling (TDD uplink-downlink dedicated configuration), or by dynamically configuring the SBFD time-frequency resources via DCI.

[0070] For a half-duplex UE that does not support the SBFD function, the UE cannot know the configuration regarding the SBFD time-frequency resource. Therefore, even if the SBFD time-frequency resource (UL subband) is configured in a DL slot or DL ​​symbol, the UE can normally receive CSI-RS in the SBFD time-frequency resource (UL subband).

[0071] For a half-duplex UE that supports the SBFD function, the UE can know the configuration regarding the SBFD time-frequency resource. Therefore, to enable the UE to successfully receive CSI-RS on the SBFD time-frequency resource, it is necessary to clarify whether DL data can be transmitted outside the DL subband (the SBFD time-frequency resource is used as the DL subband), i.e., whether DL data can be transmitted in the UL subband or guard band. For example, DL data transmission outside the DL subband is not permitted, i.e., DL data can only be transmitted in the DL subband. Or, DL data transmission outside the DL subband is permitted, i.e., DL data can be transmitted in the UL subband and / or guard band.

[0072] The method to be adopted can be indicated by one indication bit. For example, the base station may send third indication information (e.g., one indication bit) to the UE. The third indication information is used to indicate that DL data transmission outside the DL subband of the SBFD symbol is permitted or that DL data transmission outside the DL subband of the SBFD symbol is not permitted. For example, when configuring the SBFD time-frequency resource (i.e., the DL subband), the base station may introduce an additional parameter: dlReceptionOutDlSubband ENUMERATED{enabled}, Optional. This parameter is an optional parameter. If this parameter is not configured, Scheme 2 (i.e., DL data transmission outside the DL subband is not permitted) is used by default, and if this parameter is configured, Scheme 1 (i.e., DL data transmission outside the DL subband is permitted) is used.

[0073] For a half-duplex UE that supports the SBFD function, the UE can know the configuration regarding the SBFD time-frequency resource. Therefore, to enable the UE to successfully receive CSI-RS on the SBFD time-frequency resource, it is necessary to clarify whether UL data can be transmitted outside the UL subband (the SBFD time-frequency resource is used as the UL subband), i.e., whether UL data can be transmitted in the DL subband or guard band. For example, UL data transmission outside the UL subband is not allowed, i.e., UL data can only be transmitted in the UL subband. Or, UL data transmission outside the UL subband is allowed, i.e., UL data can be transmitted in the DL subband and / or guard band.

[0074] The method to be adopted can be indicated by one indication bit. For example, the base station may send fourth indication information (e.g., one indication bit) to the UE. The fourth indication information is used to indicate that DL data transmission outside the UL subband of the SBFD symbol is permitted or that UL data transmission outside the UL subband of the SBFD symbol is not permitted. For example, when configuring the SBFD time-frequency resource (i.e., the UL subband), the base station may introduce an additional parameter: ulTransmissionOutUlSubband ENUMERATED{enabled}, Optional. This parameter is an optional parameter. If this parameter is not set, Scheme 2 (i.e., UL data transmission outside the UL subband is not permitted) is used, and if this parameter is set, Scheme 1 (i.e., UL data transmission outside the UL subband is permitted) is used.

[0075] Regardless of whether Scheme 1 or Scheme 2 is used, a half-duplex UE supporting SBFD can only receive DL data or transmit UL data in the same symbol. If DL data reception and UL data transmission occur simultaneously in the same symbol, the UE must clarify how to resolve the collision. See the following examples. The UEs in the following examples all refer to half-duplex UEs supporting SBFD.

[0076] Second, CSI-RS resource configuration will be described.

[0077] When CSI-RS and UL data exist simultaneously for the same UE at a certain time, the priorities of the CSI-RS and UL data must be compared. If the priority of the CSI-RS is higher than the priority of the UL data, the UE will receive the CSI-RS. If the priority of the CSI-RS is lower than the priority of the UL data, the UE will abandon receiving the CSI-RS.

[0078] For example, for dynamically scheduled UL data transmissions such as PUSCH (Physical Uplink Shared Channel), the base station should avoid dynamically scheduling PUSCH in symbols where CSI-RS exists. If PUSCH needs to be dynamically scheduled, the UE will abandon reception of CSI-RS because the priority of PUSCH is higher than that of CSI-RS. For semi-statically scheduled PUSCH, the priority of PUSCH is higher than that of CSI-RS, so the UE will abandon reception of CSI-RS.

[0079] When a Sounding Reference Signal (SRS) and a CSI-RS collide at the same time, a decision must be made based on the type: aperiodic has a higher priority than semi-persistent, which in turn has a higher priority than periodic. For example, the priority of an SRS with aperiodic scheduling is higher than that of a CSI-RS with periodic or semi-persistent scheduling, and vice versa. In the case of the same type, the UE does not expect the base station to simultaneously activate semi-persistent and / or aperiodic CSI-RS and an SRS within the same symbol. For periodic-scheduled CSI-RS and an SRS, the CSI-RS has a higher priority.

[0080] In one embodiment, a case is illustrated in which the priority of CSI-RS is higher than the priority of UL data, i.e., by default, when a UE receives CSI-RS, collision resolution for CSI-RS has already been performed, and the UE can receive CSI-RS correctly.

[0081] In one embodiment, when configuring CSI-RS resources for SBFD symbols, a unified CSI-RS resource configuration method and / or an individual CSI-RS resource configuration method may be adopted. The unified CSI-RS resource configuration method and the individual CSI-RS resource configuration method will be described below.

[0082] In the unified CSI-RS resource configuration method, the CSI-RS resources in SBFD symbols and the CSI-RS resources in normal symbols (i.e., non-SBFD symbols) share the same configuration, i.e., one resource configuration information indicates the configuration of the CSI-RS resources in SBFD symbols and the CSI-RS resources in normal symbols.

[0083] Regarding the individual configuration method of CSI-RS resources, the CSI-RS resources in the SBFD symbols and the CSI-RS resources in the normal symbols use different configurations, i.e., one resource configuration information indicates the configuration of the CSI-RS resources in the SBFD symbols, and another resource configuration information indicates the configuration of the CSI-RS resources in the normal symbols.

[0084] Obviously, in the individual configuration manner, the CSI-RS resources may be individually configured for the UE in the SBFD symbol, and the CSI-RS resources may be configured based on the SBFD time-frequency resources.

[0085] In one embodiment, a unified CSI-RS resource configuration scheme or an individual CSI-RS resource configuration scheme may be adopted, and the two schemes may coexist. For example, if a base station configures only one CSI-RS resource set without considering the SBFD time-frequency resource configuration, it is necessary to solve the transmission mechanism when the unified CSI-RS and the UL subband overlap. If a base station configures one CSI-RS resource set in the DL subband while considering the SBFD time-frequency resource configuration, this configuration coexists with the unified CSI-RS resource configuration.

[0086] Third, we explain the unified configuration of CSI-RS resources and CSI reporting.

[0087] In the unified CSI-RS resource configuration method, CSI-RS resources in SBFD symbols and CSI-RS resources in normal symbols share the same configuration. This can lead to situations where CSI-RS resources in a CSI-RS resource set span normal symbols and SBFD symbols within the same slot, where different CSI-RS resources in a CSI-RS resource set are assigned to normal symbols or SBFD symbols, or where CSI-RS resources in a CSI-RS resource set are assigned to normal symbols or SBFD symbols at different intervals. In this way, situations can arise where CSI-RS resources overlap with UL subbands or guard bands.

[0088] 3 is a schematic diagram of a CSI-RS resource set (referred to as a first CSI-RS resource set) configured for an SBFD symbol and a normal symbol. The first CSI-RS resource set may include a first-type CSI-RS resource (e.g., CSI-RS0) located in a normal symbol. The first CSI-RS resource set may also include a second-type CSI-RS resource (e.g., CSI-RS1) located in an SBFD symbol, where the second-type CSI-RS resource exceeds the DL subband of the SBFD symbol, i.e., the second-type CSI-RS resource overlaps with the UL subband or guard band.

[0089] The base station may assign a first CSI-RS resource set to the UE, where the first CSI-RS resource set may include at least one CSI-RS resource of a first type and / or at least one CSI-RS resource of a second type.

[0090] The base station transmits first resource configuration information corresponding to the first CSI-RS resource set to the UE, and 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 may be dynamic resource configuration information or semi-static resource configuration information. The base station may transmit CSI-RS to the UE based on the first type CSI-RS resources and / or the second type CSI-RS resources in the first CSI-RS resource set, and the UE may receive CSI-RS based on the first type CSI-RS resources and / or the second type CSI-RS resources in the first CSI-RS resource set. The UE may further measure the received CSI-RS to obtain CSI and transmit the CSI to the base station.

[0091] In one embodiment, 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 normal symbol, the base station may transmit CSI-RS to the UE based on the first-type CSI-RS resource, and the UE may receive CSI-RS based on the first-type CSI-RS resource and measure the CSI-RS received in the first-type CSI-RS resource to obtain CSI, then record the CSI as second channel state information and transmit the second channel state information to the base station.

[0092] In one embodiment, 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 partial resource located in a DL subband of the SBFD symbol and a second partial resource located in an UL subband or guard band of the SBFD symbol.

[0093] When downlink data transmission outside the DL subband of the SBFD symbol is allowed, the base station transmits a CSI-RS to the UE based on the first partial resource and the second partial resource, and the UE receives the CSI-RS based on the first partial resource and the second partial resource, measures the received CSI-RS to obtain channel state information (i.e., the measurement result), and transmits the channel state information to the base station.

[0094] If downlink data transmission outside the DL subband of the SBFD symbol is not permitted, the following methods may be adopted: Method 1: The base station prohibits the transmission of CSI-RS to the UE based on the first partial resource and the second partial resource, and the UE prohibits the reception of CSI-RS based on the first partial resource and the second partial resource.

[0095] In Scheme 1, if the second type of CSI-RS resource exceeds the range of the DL subband, the base station abandons the transmission of the CSI-RS, and the UE does not receive and measure the CSI-RS on the corresponding time-frequency resource.

[0096] For periodic or semi-persistent CSI-RS, the UE may measure the CSI-RS received in the previous period that does not overlap with the uplink subband or guard band, determine the measurement result as the channel state information for the current period, and transmit the channel state information to the base station. For example, the UE performs measurement based on the CSI-RS that does not overlap with the UL subband in the previous period of the second-type CSI-RS resource and reports the CSI result to the base station according to the current CSI reporting flow. In this case, the timeRestricionForChannelMeasurement is not configured in the RRC signaling.

[0097] Scheme 2: The base station transmits CSI-RS to the UE based on the first partial resource and prohibits transmission of CSI-RS based on the second partial resource. The UE receives CSI-RS based on the first partial resource and prohibits reception of CSI-RS based on the second partial resource. In Scheme 2, CSI-RS can only be transmitted within the DL subband, and the portion outside the DL subband is discarded. The UE receives part of the CSI-RS within the DL subband.

[0098] In one embodiment, for a CSI-RS for time-frequency tracking, if the size of the frequency domain resource (i.e., the first partial resource) for transmitting the CSI-RS exceeds 52 PRBs, the UE tracks the time offset and frequency offset using the CSI-RS in the DL subband. If the size of the frequency domain resource for transmitting the CSI-RS is 52 PRBs or less, the UE does not track the time offset and frequency offset using the CSI-RS in the DL subband.

[0099] For CSI-RS used for purposes other than the time-frequency tracking function, if the size of the frequency domain resource for transmitting the CSI-RS exceeds 24 PRB, the UE may perform measurements using the CSI-RS in the DL subband, obtain CSI results, and report them to the base station. If the size of the frequency domain resource for transmitting the CSI-RS is 24 PRB or less, the UE does not perform measurements using the CSI-RS in the DL subband.

[0100] In one embodiment, after receiving CSI-RS based on the first partial resource and prohibiting reception of CSI-RS based on the second partial resource, the UE may measure the CSI-RS received in the first partial resource to obtain first channel state information (i.e., CSI measurement result), and transmit the first channel state information to the base station.

[0101] In summary, the UE can obtain first channel state information (CSI measurement results corresponding to CSI-RS received on a first partial resource within the second type of CSI-RS resource) and second channel state information (CSI measurement results corresponding to CSI-RS received on the first type of CSI-RS resource). The UE may transmit the first channel state information and the second channel state information to the base station via different uplink resources, or may transmit the first channel state information and the second channel state information to the base station via the same uplink resource. For example, the CSI report is associated with a CSI-RS resource set, and for a periodic or semi-persistent CSI-RS resource set spanning SBFD symbols or normal symbols, the CSI may be reported in the following manner:

[0102] Method A: Different CSI reporting configurations are configured for periodic or semi-persistent CSI-RS resources in SBFD symbols (i.e., second-type CSI-RS resources) and periodic or semi-persistent CSI-RS resources in normal symbols (i.e., first-type CSI-RS resources). For example, a CSI report needs to be associated with any CSI-RS resource in the CSI-RS resource set. That is, there are separate associated CSI reporting configurations for both CSI-RS resources that do not overlap with the UL subband or guard band (i.e., first-type CSI-RS resources) and CSI-RS resources that overlap with the UL subband or guard band (i.e., second-type CSI-RS resources).

[0103] In conclusion, there is a separate associated CSI reporting configuration for both the first type CSI-RS resource and the second type CSI-RS resource, and thus the UE transmits the first channel state information corresponding to the second type CSI-RS resource and the second channel state information corresponding to the first type CSI-RS resource to the base station via different uplink resources.

[0104] Scheme B: The same CSI reporting is configured for periodic or semi-persistent CSI-RS resources in SBFD symbols and periodic or semi-persistent CSI-RS resources in normal symbols. That is, the first-type CSI-RS resources and the second-type CSI-RS resources correspond to the same CSI reporting configuration. Therefore, the UE may transmit first channel state information corresponding to the second-type CSI-RS resources and second channel state information corresponding to the first-type CSI-RS resources to the base station via the same uplink resource.

[0105] For Scheme A and Scheme B, the base station does not need additional higher layer signaling to notify the UE, but only needs to associate the CSI report with the corresponding CSI-RS resource when configuring the CSI report.

[0106] In one embodiment, in Scheme 2, for wideband CSI reporting, the UE measures first channel state information based only on all CSI-RSs in non-overlapping time-frequency resources (i.e., the first partial resources of the second-type CSI-RS resources) and transmits the first channel state information to the base station. The first channel state information includes, but is not limited to, at least one of CQI, PMI, RI, LI, L1-RSRP, and L1-SINR.

[0107] In one embodiment, for CSI-RS used for beam refinement and beam management, if there are second-type CSI-RS resources that overlap with UL subbands or guard bands and first-type CSI-RS resources that do not overlap with UL subbands or guard bands, reporting of L1-RSRP and / or L1-SINR may include the following:

[0108] When the first channel state information includes a plurality of first L1-RSRPs and the second channel state information includes a plurality of second L1-RSRPs, the UE may select N first L1-RSRPs from the plurality of first L1-RSRPs and N second L1-RSRPs from the plurality of second L1-RSRPs, and transmit the N first L1-RSRPs and the N second L1-RSRPs to the base station. And / or when the first channel state information includes a plurality of first L1-SINRs and the second channel state information includes a plurality of second L1-SINRs, the UE may select N first L1-SINRs from the plurality of first L1-SINRs and N second L1-SINRs from the plurality of second L1-SINRs, and transmit the N first L1-SINRs and the N second L1-SINRs to the base station.

[0109] For example, the L1-RSRP and / or L1-SINR in the CSI may be divided into two groups. Each group may consist of N values ​​(when only L1-RSRP or L1-SINR is reported) or 2N values ​​(when both L1-RSRP and L1-SINR are reported), where N is 1, 2, 3, etc., but is not limited thereto. The CSI content of each group may include the 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 CSI content of the first group may be obtained from non-overlapping first-type CSI-RS resources. That is, N second L1-RSRP values ​​and / or N second L1-SINR values ​​may be selected from second channel state information. The CSI content of the second group may be obtained from overlapping second-type CSI-RS resources. That is, N first L1-RSRPs and / or N first L1-SINRs are selected from the first channel state information.

[0110] The CSI content of the first group is arranged in the order of the CSI content of the second group, or the CSI content of the second group is arranged in the order of the CSI content of the first group, for example, N second L1-RSRPs, N second L1-SINRs, N first L1-RSRPs, and N first L1-SINRs.

[0111] Table 1 shows an example of the structure of L1-RSRP and L1-SINR in CSI.

[0112] [Table 1]

[0113] When N is 2, non-overlapping RSRP#1 / SINR#1 is the maximum L1-RSRP value / maximum L1-SINR value in the second channel state information, non-overlapping RSRP#2 / SINR#2 is the second largest L1-RSRP value / second largest L1-SINR value in the second channel state information, Differential RSRP#2 / SINR#2 is the difference between the second largest L1-RSRP value / second largest L1-SINR value and the maximum L1-RSRP value / maximum L1-SINR value, overlapping RSRP#1 / SINR#1 is the maximum L1-RSRP value / maximum L1-SINR value in the first channel state information, and overlapping RSRP#2 / SINR#2 is the second largest L1-RSRP value / second largest L1-SINR value in the first channel state information.

[0114] When the first channel state information includes a plurality of first L1-RSRPs and the second channel state information includes a plurality of second L1-RSRPs, the UE selects 2N L1-RSRPs from the plurality of first L1-RSRPs and the plurality of second L1-RSRPs and transmits the 2N L1-RSRPs to the base station. And / or when the first channel state information includes a plurality of first L1-SINRs and the second channel state information includes a plurality of second L1-SINRs, the UE selects 2N L1-SINRs from the plurality of first L1-SINRs and the plurality of second L1-SINRs and transmits 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. Here, the CSI content is obtained from non-overlapping CSI-RS resources of the first type and overlapping CSI-RS resources of the second type, ie, selected from all channel state information.

[0115] In one embodiment, wideband CSI reporting can only report coarse-grained CSI, and subband-based CSI reporting may be introduced to obtain finer-grained CSI. That is, CSI is reported based on a CSI subband (different from a subband in SBFD). The base station can set different CSI subband sizes depending on the size of the BWP. Table 2 shows examples of CSI subband sizes. Here, the CSI reported based on the CSI subband may be, but is not limited to, PMI and / or CQI.

[0116] [Table 2]

[0117] In one embodiment, when the first partial resource of the second-type CSI-RS resource corresponds to at least one CSI subband, for each CSI subband, if the CSI subband completely overlaps with an uplink subband or a guard band of an SBFD symbol, measurement of the CSI-RS received in the CSI subband is prohibited, i.e., the UE abandons reporting CSI in the CSI subband that completely overlaps with an UL subband and reports CSI in the non-overlapping CSI subband.

[0118] For each CSI subband, if the CSI subband does not overlap with an uplink subband or a guard band of an SBFD symbol, the UE measures the CSI-RS received in the CSI subband to obtain a measurement result (i.e., first channel state information) for the CSI subband. That is, the UE reports the CSI in the non-overlapping CSI subband.

[0119] For each CSI subband, if the CSI subband partially overlaps with the uplink subband or guard band of the SBFD symbol, it is handled in the following manner. Figure 4 is a schematic diagram of a case where the CSI subband and the UL subband are not aligned. The size of the RBG (Resource Block Group) and the size of the CSI subband are both 8 PRB. In RBG2 and RBG14, there are situations where the UL subband / guard band and the CSI subband are not aligned. That is, the CSI subband partially overlaps with the UL subband or guard band.

[0120] Method 2-1: Prohibit measurement of CSI-RS received in CSI subbands, i.e., the UE abandons reporting CSI in CSI subbands that partially overlap with the UL subband and reports CSI in non-overlapping CSI subbands.

[0121] Method 2-2: Determine whether to measure the CSI-RS received in the CSI subband based on the size of the non-overlapping resource of the CSI subband. If the measurement is to be performed, measure the CSI-RS received in the CSI subband to obtain the measurement result for the CSI subband. If the measurement is not to be performed, prohibit measurement of the CSI-RS received in the CSI subband.

[0122] For example, the CSI subband includes resources that overlap with the UL subband / guard band and resources that do not overlap with the UL subband / guard band. If the size of the non-overlapping resources is equal to or greater than half of the total CSI subband resource size (this value is configurable and may be 2 / 3, 3 / 4, etc.), for example, when the size of the CSI subband is 8 PRB, if the size of the non-overlapping resources is 4 PRB or greater, the CSI-RS received in the CSI subband is measured (e.g., the CSI is calculated based on the non-overlapping resources), and if the size of the non-overlapping resources is less than 4 PRB, measurement of the CSI-RS received in the CSI subband is prohibited.

[0123] In summary, when the first partial resource of the second-type CSI-RS resource corresponds to at least one CSI subband, measurement results for each CSI subband can be obtained, and the first channel state information can be determined based on the measurement results for each CSI subband. For example, the first channel state information includes the measurement results for each CSI subband.

[0124] In one embodiment, the base station may configure whether to use Scheme 1 or Scheme 2, and whether to use Scheme 2-1 or Scheme 2-2 in Scheme 2, by signaling (e.g., RRC signaling). For example, the base station may transmit first instruction information to the UE, which is used to instruct the UE to employ Scheme 1 (prohibiting transmission of CSI-RS based on the first and second partial resources) or Scheme 2 (transmitting CSI-RS based on the first partial resources and prohibiting transmission of CSI-RS based on the second partial resources). If the first instruction information instructs the UE to employ Scheme 2, the base station may transmit second instruction information to the UE, which is used to instruct the UE to employ Scheme 2-1 (prohibiting measurement of CSI-RS received in CSI subbands) or Scheme 2-2 (determining whether to measure CSI-RS received in CSI subbands based on the size of non-overlapping resources of the CSI subbands).

[0125] For example, an example of RRC signaling sent by the base station is as follows:

[0126] CSI-ReportConfig ::= SEQUENCE { … csiReportUsingPartialCsirs ENUMERATED {enable}, optional, csiReportUsingPartialCsiSubband ENUMERATED {enable}, optional, … }

[0127] If csiReportUsingPartialCsirs is set, it indicates that Method 2 is to be adopted, and if this parameter is not set, it indicates that Method 1 is to be adopted. Only when Method 2 is adopted, csiReportUsingPartialCsiSubband can be set, and if this parameter is set, it indicates that Method 2-2 is to be adopted, and if this parameter is not set, it indicates that Method 2-1 is to be adopted.

[0128] In one embodiment, when reporting subband CQI and subband PMI, the subband CQI and subband PMI are both obtained by the UE by measuring and calculating them using some available CSI-RS resources in the DL subband. Here, the reporting format of the subband CQI and subband PMI is not limited here. The order of the subband CQI and subband PMI in the CSI is arranged according to the order of the actually calculated subband CQI and subband PMI. For example, subband PMI and subband CQI that overlap with the UL subband or guard band are excluded, and only subband CQI and subband PMI of the CSI subband corresponding to the available CSI-RS resources are reported. After receiving the CSI reported from the UE, the base station identifies the PRB to which the reported subband CQI and subband PMI correspond based on the corresponding CSI-RS frequency domain resource in the DL subband and the CSI subband configuration, and uses the identification result for frequency domain scheduling of subsequent data.

[0129] Fourth, we explain the individual configuration of CSI-RS resources and CSI reporting.

[0130] In the CSI-RS resource individual configuration method, 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 may configure a second CSI-RS resource set and a third CSI-RS resource set for the UE. The second CSI-RS resource set may include CSI-RS resources in the SBFD symbols, which is referred to as a third-type CSI-RS resource. The third-type CSI-RS resource is located in the downlink subband of the SBFD symbol. The third CSI-RS resource set may include CSI-RS resources in the normal symbols, which is referred to as a fourth-type CSI-RS resource. The fourth-type CSI-RS resource is located in the downlink symbol.

[0131] For the third-type CSI-RS resources in the second CSI-RS resource set, the configuration of the third-type CSI-RS resources is adjusted so that all the third-type CSI-RS resources are located within the DL subband. In the time domain, for periodic CSI-RS and semi-persistent CSI-RS, the slot in which the CSI-RS is located is determined based on CSI-ResourcePeriodicityAndOffset. For aperiodic CSI-RS, the slot in which the CSI-RS is located is determined based on the slot of the DCI active message. Furthermore, the symbol position of the CSI-RS within the slot may be determined using firstOFDMSymbolInTimeDomain and firstOFDMSymbolInTimeDomain2. This ensures that all the dedicated third-type CSI-RS resources are located within the SBFD symbol, i.e., that the third-type CSI-RS resources do not exceed the DL subband of the SBFD symbol.

[0132] 5 is a schematic diagram of a CSI-RS resource set (referred to as a second CSI-RS resource set) configured in an SBFD symbol. The second CSI-RS resource set includes a third-type CSI-RS resource located in the SBFD symbol (e.g., CSI-RS0 and CSI-RS1, where CSI-RS0 is located in slot 1 of each frame structure period and CSI-RS1 is located in slot 4 of each frame structure period), and the third-type CSI-RS resource is located in the DL subband and does not overlap with the UL subband or the guard band.

[0133] In one embodiment, the base station may allocate a second CSI-RS resource set and a third CSI-RS resource set to the UE, where the second CSI-RS resource set may include at least one CSI-RS resource of a third type, and the third CSI-RS resource set may include at least one CSI-RS resource of a fourth type.

[0134] The base station transmits 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, and 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, where the second resource configuration information is dynamic resource configuration information or semi-static resource configuration information, and the third resource configuration information is dynamic resource configuration information or semi-static resource configuration information.

[0135] The base station transmits CSI-RS to the UE based on the third type CSI-RS resource in the second CSI-RS resource set and / or the fourth type CSI-RS resource in the third CSI-RS resource set, and the UE receives CSI-RS based on the third type CSI-RS resource in the second CSI-RS resource set and / or the fourth type CSI-RS resource in the third CSI-RS resource set. The UE measures the received CSI-RS to obtain CSI and transmits the CSI to the base station.

[0136] In one embodiment, 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 transmits CSI-RS to the UE based on the fourth type CSI-RS resource, and the UE receives CSI-RS based on the fourth type CSI-RS resource, measures the CSI-RS received in the fourth type CSI-RS resource to obtain CSI, and transmits the CSI to the base station.

[0137] In one embodiment, for each third-type CSI-RS resource in the second CSI-RS resource set, the third-type CSI-RS resource is located in an SBFD symbol and does not exceed the DL subband of the SBFD symbol. The base station transmits the CSI-RS to the UE based on the third-type CSI-RS resource, and the UE receives the CSI-RS based on the third-type CSI-RS resource, measures the received CSI-RS in the third-type CSI-RS resource to obtain CSI, and transmits the CSI to the base station.

[0138] In one embodiment, the third type CSI-RS resource includes only resources located in the DL subband of the SBFD symbol. If the third type CSI-RS resource occupies only contiguous resources in the DL subband, the second resource configuration information includes the RB starting positions and occupied RB numbers corresponding to the contiguous resources. If the third type CSI-RS resource occupies two non-contiguous resources in the DL subband, the second resource configuration information includes the RB starting positions and occupied RB numbers corresponding to each of the two resources. 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, these two non-contiguous resources belong to the same CSI-RS and are located on both sides of the UL subband.

[0139] In the frequency domain, the starting RB and nrofRBs in the freqBand parameter determine the RB starting position and the number of occupied RBs for CSI-RS resources in the frequency domain. The starting RB position and the number of occupied RBs ensure that all CSI-RS frequency domain resources fall within the DL subband. If the DL subband is two non-contiguous resources, an additional startingRB / nrofRBs pair is introduced in the CSI-RS resource configuration. The two startingRB / nrofRBs pairs indicate CSI-RS resources in different DL subbands, as follows:

[0140] CSI-FrequencyOccupation ::= SEQUENCE { startingRB INTEGER (0..maxNrofPhysicalResourceBlocks-1), nrofRBs INTEGER (24..maxNrofPhysicalResourceBlocksPlus1), startingRB1 INTEGER (0..maxNrofPhysicalResourceBlocks-1), nrofRBs1 INTEGER (24..maxNrofPhysicalResourceBlocksPlus1), ... }

[0141] In one embodiment, regarding the alignment issue between the CSI-RS resource and the DL subband boundary, the RB index of the RB starting position of the CSI-RS resource is an integer multiple of a first value (e.g., 4), the number of occupied RBs of the CSI-RS resource is an integer multiple of the first value, and the minimum number of RBs of the occupied RBs 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 smaller than the second value. Based on this, the following scheme may be adopted.

[0142] Method a: The RB starting position corresponding to the third type CSI-RS resource is an integer multiple of a first value, the number of occupied RBs corresponding to the third type CSI-RS resource is equal to or greater than a second value, and the number of occupied RBs corresponding to the third type CSI-RS resource is an integer multiple of the first value. For example, when configuring the third type CSI-RS resource in a DL subband, the RB starting position 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 (i.e., the number of occupied RBs is equal to or greater than 24). If the DL subband is smaller than 24 RBs, the configuration of the third type CSI-RS resource in that DL subband is abandoned.

[0143] Scheme b: The RB start position corresponding to the third type CSI-RS resource is the start position of the DL subband of the SBFD symbol, and the number of occupied RBs corresponding to 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 start position of the DL subband is set to the RB start position corresponding to the third type CSI-RS resource, and the number of occupied RBs is set according to the frequency domain resources required for the third type CSI-RS resource (i.e., the number of occupied RBs 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.

[0144] In method b, the RB index of the RB starting position corresponding to the third type CSI-RS resource does not have to be an integer multiple of 4, the number of occupied RBs corresponding to the third type CSI-RS resource does not have to be an integer multiple of 4, and the size of the number of occupied RBs corresponding to the third type CSI-RS resource is not limited and may be any value.

[0145] In scheme b, when CSI reporting is based on subband granularity (i.e., CSI subband), the first CSI subband corresponding to the CSI-RS resource in the first DL subband starts from startingRB, and its size is the size of the CSI subband configured by higher layer signaling.

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[0146] For Scheme b, a new capability parameter, e.g., csiRsCapability, may be introduced into the UE's capability set. If the UE supports the CSI-RS configuration specified in Scheme b, the UE reports this parameter to the base station in the capability reporting process, and the base station may configure CSI-RS resources using Scheme b. If the UE does not report this capability, the base station configures CSI-RS resources using Scheme a by default. In summary, if the UE's capability parameter indicates that it is capable of supporting arbitrary RB starting positions, Scheme b is adopted. If the UE's capability parameter indicates that it is not capable of supporting arbitrary RB starting positions, Scheme a is adopted.

[0147] In one embodiment, the UE measures a dedicated CSI-RS resource (e.g., a third-type CSI-RS resource) and reports the measurement results by including them in the CSI corresponding to the CSI-RS resource. The UE calculates the measurement results, such as RI, LI, L1-RSRP, L1-SINR, wideband CQI, and wideband PMI, based on all time-frequency resources corresponding to the CSI-RS. For subband-based CSI reporting, the subband PMI and subband CQI in the CSI content are reported in the order of the subband indexes.

[0148] Fifth, CSI-RS power control will be described.

[0149] Regardless of whether unified or individual CSI-RS resource configuration is adopted, if CSI-RS transmission is not permitted on resources outside the DL subband, the CSI-RS power allocation algorithm must be adjusted to comply with the new CSI-RS resource configuration policy.

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[0150] Transmit power

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[0151] It maintains the same EPRE as the CSI-RS in the normal symbol. In this scheme, the total power of the CSI-RS is

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[0152] The base station decides which method to use depending on the scenario and does not need to notify the UE.

[0153] In one embodiment, when the base station transmits CSI-RS based on a first partial resource of the second-type CSI-RS resources and prohibits transmission of CSI-RS based on a second partial resource of the second-type CSI-RS resources, the base station may determine a target transmission power based on the maximum transmission power of the second-type CSI-RS resources (i.e., the transmission power corresponding to both the first and second partial resources) and transmit CSI-RS based on the first partial resource at the target transmission power. Alternatively, the base station may determine a target transmission power based on the maximum transmission power of the second-type CSI-RS resources and a resource ratio and transmit CSI-RS based on the first partial resource at the target transmission power. The resource ratio is the resource ratio between the first partial resource and the second-type CSI-RS resources (i.e., the sum of the first and second partial resources).

[0154] Based on the same inventive concept, a CSI-RS transmission device, a base station, and a UE corresponding to the CSI-RS transmission method are further provided. Because the principles by which the base station and the UE solve the problem are similar to those of the CSI-RS transmission method, the implementation of the base station and the UE can refer to the implementation of the CSI-RS transmission method, and will not be repeated in this specification.

[0155] Based on the same application concept as the above method, one embodiment of the present invention provides a CSI-RS transmission device applied to a user equipment. Referring to Figure 6A, the device comprises: a first receiving module 611 configured to receive resource configuration information corresponding to a CSI-RS resource set sent from a base station; a second receiving module 612 configured to receive a CSI-RS transmitted from a base station based on the CSI-RS resources in the CSI-RS resource set; Here, the resource configuration information is information for indicating a CSI-RS resource set, the CSI-RS resource set includes CSI-RS resources located in an SBFD symbol, and the CSI-RS resources are located beyond the range of a downlink subband of the SBFD symbol or within the downlink subband of the SBFD symbol.

[0156] In one embodiment, the resource configuration information includes first resource configuration information corresponding to a first CSI-RS resource set, the first resource configuration information being information for indicating a first CSI-RS resource set, the first CSI-RS resource set including a first-type CSI-RS resource located in a normal symbol and a second-type CSI-RS resource located in an SBFD symbol, and the second-type CSI-RS resource exceeds a range of a downlink subband of the SBFD symbol. Or, The resource configuration information includes second resource configuration information corresponding to a second CSI-RS resource set and third resource configuration information corresponding to a third CSI-RS resource set, the second resource configuration information is information for indicating the second CSI-RS resource set, and the third resource configuration information is information for indicating the third CSI-RS resource set, wherein the second CSI-RS resource set includes CSI-RS resources of a third type located in an SBFD symbol, the CSI-RS resources of the third type being located in a downlink subband of the SBFD symbol, and the third CSI-RS resource set includes CSI-RS resources of a fourth type located in a normal symbol.

[0157] In one embodiment, when the second-type CSI-RS resource includes a first partial resource located in a downlink subband of an SBFD symbol and a second partial resource located in an uplink subband or a guard band of an SBFD symbol, when the second receiving module 612 receives the CSI-RS transmitted from the base station based on the second-type CSI-RS resource in the first CSI-RS resource set, specifically: configured to receive a CSI-RS based on a first partial resource and a second partial resource of the second type of CSI-RS resource when downlink data transmission outside the downlink subband of an SBFD symbol is permitted; Or, When downlink data transmission outside the downlink subband of an SBFD symbol is not permitted, the reception of CSI-RS based on the first partial resource and the second partial resource of the CSI-RS resource of the second type is prohibited, or the reception of CSI-RS based on the first partial resource of the CSI-RS resource of the second type and the reception of CSI-RS based on the second partial resource of the CSI-RS resource of the second type are prohibited.

[0158] In one embodiment, the device further includes a transmitting module (not shown in FIG. 6A ) configured to: receive a CSI-RS based on a first partial resource of the CSI-RS resource of the second type and, after prohibiting reception of a CSI-RS based on a second partial resource of the CSI-RS resource of the second type, measure the CSI-RS received on the first partial resource of the CSI-RS resource of the second type to obtain first channel state information, transmit the first channel state information to the base station; and, after prohibiting reception of a CSI-RS based on the first and second partial resources of the CSI-RS resource of the second type, perform measurements based on a CSI-RS that does not overlap with an uplink subband or a guard band in a previous period, determine the measurement result as channel state information for a current period, and transmit the channel state information to the base station.

[0159] In one embodiment, the transmitting module is further configured to, after receiving a CSI-RS transmitted from the base station based on a first type of CSI-RS resource in the first CSI-RS resource set, measure the CSI-RS received on the first type of CSI-RS resource to obtain second channel state information, and transmit the second channel state information to the base station; wherein, when the transmitting module transmits the first channel state information to the base station and the second channel state information to the base station, When the first channel state information includes a plurality of first L1-RSRPs and the second channel state information includes a plurality of second L1-RSRPs, Selecting N first L1-RSRPs from the plurality of first L1-RSRPs and selecting N second L1-RSRPs from the plurality of 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 plurality of first L1-RSRPs and the plurality of second L1-RSRPs, and sending the 2N L1-RSRPs to the base station; and / or When the first channel state information includes a plurality of first L1-SINRs and the second channel state information includes a plurality of second L1-SINRs, Selecting N first L1-SINRs from the plurality of first L1-SINRs and selecting N second L1-SINRs from the plurality of second L1-SINRs, and sending the N first L1-SINRs and the N second L1-SINRs to the base station; or The L1-SINR selection unit is configured to select 2N L1-SINRs from the plurality of first L1-SINRs and the plurality of second L1-SINRs, and transmit the 2N L1-SINRs to the base station.

[0160] In one embodiment, when the transmitting module measures the CSI-RS received in the first partial resource of the second-type CSI-RS resource to obtain first channel state information, specifically: If the first partial resource of the second-type CSI-RS resource corresponds to at least one CSI subband, for each CSI subband: prohibiting measurement of a CSI-RS received in the CSI subband if the CSI subband completely overlaps with an uplink subband or a guard band of an SBFD symbol; If the CSI subband does not overlap with an uplink subband or a guard band of an SBFD symbol, measure a CSI-RS received in the CSI subband to obtain a measurement result for the CSI subband; prohibiting measurement of the CSI-RS received in the CSI subband when the CSI subband partially overlaps with an uplink subband or a guard band of an SBFD symbol, or determining whether to measure the CSI-RS received in the CSI subband based on a size of a non-overlapping resource of the CSI subband, and if measuring, measuring the CSI-RS received in the CSI subband to obtain a measurement result for the CSI subband; and prohibiting measurement of the CSI-RS received in the CSI subband when not measuring; The first channel state information is configured to determine the first channel state information based on measurements on each CSI subband.

[0161] In one embodiment, the first receiving module 611 is further configured to receive first indication information sent from the base station, where the first indication information is used to indicate prohibiting transmission of CSI-RS based on first and second partial resources of CSI-RS resources of a second type, or to indicate transmitting CSI-RS based on the first partial resources of CSI-RS resources of the second type and prohibiting transmission of CSI-RS based on the second partial resources of CSI-RS resources of the second type; When the first instruction information instructs transmitting a CSI-RS based on a first partial resource of a second type of CSI-RS resource and prohibiting transmission of a CSI-RS based on a second partial resource of the second type of CSI-RS resource, the first receiving module 611 is further configured to receive second instruction information sent from the base station; Here, the second instruction information is used to instruct prohibiting measurement of a CSI-RS received in a CSI subband that overlaps with an uplink subband or a guard band, or to instruct determining whether to measure a CSI-RS received in a CSI subband based on the size of the non-overlapping resources of the CSI subband.

[0162] In one embodiment, the transmission module is further configured to, after receiving a CSI-RS transmitted from the base station based on a first type of CSI-RS resource in the first CSI-RS resource set, measure the CSI-RS received on the first type of CSI-RS resource to obtain second channel state information, and transmit the second channel state information to the base station, wherein the first channel state information and the second channel state information are transmitted to the base station via different uplink resources or via the same uplink resource.

[0163] In one embodiment, the third type CSI-RS resource includes only resources located within the downlink subband of an SBFD symbol, and if the third type CSI-RS resource occupies only contiguous resources of a downlink subband, the second resource configuration information includes the RB starting position and the RB occupied number corresponding to the contiguous resources, and if the third type CSI-RS resource occupies two non-contiguous resources of a downlink subband, the second resource configuration information includes the RB starting position and the RB occupied number corresponding to each of the two resources.

[0164] In one embodiment, an RB starting position corresponding to the third-type CSI-RS resource is an integer multiple of a first value, and the number of RBs occupied corresponding to the third-type CSI-RS resource is equal to or greater than a second value, and the number of RBs occupied corresponding to the third-type CSI-RS resource is an integer multiple of the first value. Or, an RB start position corresponding to the third type CSI-RS resource is a start position of a downlink subband of an SBFD symbol, and the number of RBs occupied by the third type CSI-RS resource is an arbitrary value; wherein, when the capability parameter of the user equipment indicates that it has the capability to support an arbitrary RB starting position, the RB starting position corresponding to the third type CSI-RS resource is a starting position of a downlink subband of an SBFD symbol, and the number of occupied RBs corresponding to the third type 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 arbitrary RB starting positions, the RB starting position corresponding to the third type CSI-RS resource is an integer multiple of a first value, and the number of RBs occupied corresponding to the third type CSI-RS resource is greater than or equal to a second value, and the number of RBs occupied corresponding to the third type CSI-RS resource is an integer multiple of the first value.

[0165] In one embodiment, the first receiving module 611 is further configured to receive third indication information sent from the base station, where the third indication information is used to indicate that downlink data transmission outside of a downlink subband of an SBFD symbol is permitted or to indicate that downlink data transmission outside of a downlink subband of an SBFD symbol is not permitted; and / or The first receiving module 611 is further configured to receive fourth instruction information sent from the base station, where the fourth instruction information is used to indicate allowing uplink data transmission outside the uplink subband of an SBFD symbol or to indicate not allowing uplink data transmission outside the uplink subband of an SBFD symbol.

[0166] Based on the same application concept as the above method, one embodiment of the present invention provides a CSI-RS transmission device applied to a base station. Referring to Figure 6B, the device includes: a first transmission module 621 configured to transmit resource configuration information corresponding to a CSI-RS resource set to a user equipment; and a second transmission module 622 configured to transmit a CSI-RS to the user equipment based on CSI-RS resources in the CSI-RS resource set, thereby causing the user equipment to receive a CSI-RS based on the CSI-RS resources in the CSI-RS resource set; Here, the resource configuration information is information for indicating a CSI-RS resource set to be used by the user equipment, the CSI-RS resource set includes CSI-RS resources located in an SBFD symbol, and the CSI-RS resources are located beyond the range of a downlink subband of the SBFD symbol or within the downlink subband of the SBFD symbol.

[0167] In one embodiment, when the first sending module 621 sends resource configuration information corresponding to the CSI-RS resource set to the user equipment, it specifically: configured to transmit, to the user equipment, first resource configuration information corresponding to the first CSI-RS resource set when the user equipment is compatible with a first CSI-RS resource set, where the first CSI-RS resource set includes a first-type CSI-RS resource located in a normal symbol and a second-type CSI-RS resource located in an SBFD symbol, and the second-type CSI-RS resource exceeds a downlink subband of the SBFD symbol; Or, configured to transmit, to the user equipment, 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, if the user equipment supports a second CSI-RS resource set and a third CSI-RS resource set, where the second CSI-RS resource set includes CSI-RS resources of a third type located in an SBFD symbol, the CSI-RS resources of the third type being located in a downlink subband of the SBFD symbol, and the CSI-RS resources of the third type including CSI-RS resources of a fourth type located in a normal symbol.

[0168] In one embodiment, when the second type CSI-RS resource includes a first partial resource located in a downlink subband of an SBFD symbol and a second partial resource located in an uplink subband or a guard band of an SBFD symbol, the second transmission module 622 transmits a CSI-RS to the user equipment based on the second type CSI-RS resource in the first CSI-RS resource set: configured to transmit a CSI-RS based on a first partial resource and a second partial resource of the second type of CSI-RS resource when downlink data transmission outside the downlink subband of an SBFD symbol is permitted; Or, When downlink data transmission outside the downlink subband of the SBFD symbol is not permitted, the transmission of CSI-RS based on the first partial resource and the second partial resource of the CSI-RS resource of the second type is prohibited, or the transmission of CSI-RS based on the first partial resource of the CSI-RS resource of the second type and the transmission of CSI-RS based on the second partial resource of the CSI-RS resource of the second type are prohibited.

[0169] In one embodiment, the first sending module 621 is further configured to send first indication information to the user equipment, where the first indication information is used to indicate prohibiting transmission of CSI-RS based on first and second partial resources of CSI-RS resources of a second type, or to indicate transmitting CSI-RS based on the first partial resources of CSI-RS resources of the second type and prohibiting transmission of CSI-RS based on the second partial resources of CSI-RS resources of the second type; If the first indication information instructs transmitting a CSI-RS based on a first partial resource of a second type of CSI-RS resource and prohibiting transmission of a CSI-RS based on a second partial resource of the second type of CSI-RS resource, the first sending module is further configured to send second indication information to the user equipment; Here, the second instruction information is used to instruct prohibiting measurement of a CSI-RS received in a CSI subband that overlaps with an uplink subband or a guard band, or to instruct determining whether to measure a CSI-RS received in a CSI subband based on the size of the non-overlapping resources of the CSI subband.

[0170] In one embodiment, the third type CSI-RS resource includes only resources located within the downlink subband of an SBFD symbol, and if the third type CSI-RS resource occupies only contiguous resources of a downlink subband, the second resource configuration information includes the RB starting position and the RB occupied number corresponding to the contiguous resources, and if the third type CSI-RS resource occupies two non-contiguous resources of a downlink subband, the second resource configuration information includes the RB starting position and the RB occupied number corresponding to each of the two resources.

[0171] In one embodiment, an RB starting position corresponding to the third-type CSI-RS resource is an integer multiple of a first value, and the number of RBs occupied corresponding to the third-type CSI-RS resource is equal to or greater than a second value, and the number of RBs occupied corresponding to the third-type CSI-RS resource is an integer multiple of the first value. Or, an RB start position corresponding to the third type CSI-RS resource is a start position of a downlink subband of an SBFD symbol, and the number of RBs occupied by the third type CSI-RS resource is an arbitrary value; wherein, when the capability parameter of the user equipment indicates that it has the capability to support an arbitrary RB starting position, the RB starting position corresponding to the third type CSI-RS resource is a starting position of a downlink subband of an SBFD symbol, and the number of occupied RBs corresponding to the third type 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 arbitrary RB starting positions, the RB starting position corresponding to the third type CSI-RS resource is an integer multiple of a first value, and the number of RBs occupied corresponding to the third type CSI-RS resource is greater than or equal to a second value, and the number of RBs occupied corresponding to the third type CSI-RS resource is an integer multiple of the first value.

[0172] In one embodiment, the first transmitting module 621 is further configured to send third indication information to the user equipment, where the third indication information is used to indicate that downlink data transmission outside of a downlink subband of an SBFD symbol is permitted or to indicate that downlink data transmission outside of a downlink subband of an SBFD symbol is not permitted; and / or The first transmitting module 621 is further configured to transmit fourth indication information to the user equipment, where the fourth indication information is used to indicate that uplink data transmission outside the uplink subband of an SBFD symbol is permitted, or to indicate that uplink data transmission outside the uplink subband of an SBFD symbol is not permitted.

[0173] In one embodiment, when the second transmission module 622 transmits a CSI-RS based on a first partial resource of the second type of CSI-RS resource and prohibits transmission of a CSI-RS based on a second partial resource of the second type of CSI-RS resource, specifically: determining a target transmission power based on a maximum transmission power of the second-type CSI-RS resource, or determining a target transmission power based on the maximum transmission power of the second-type CSI-RS resource and a resource ratio; configured to transmit a CSI-RS based on the first partial resource under the target transmit power; Here, the resource ratio is the resource ratio between the first partial resource and the second type CSI-RS resource.

[0174] Based on the same application concept as the above method, one embodiment of the present invention provides a base station. Referring to Figure 7A, the base station includes a processor 711 and a machine-readable storage medium 712. The machine-readable storage medium 712 stores machine-executable instructions executable by the processor 711. The processor 711 is configured to execute the machine-executable instructions to implement the CSI-RS transmission method disclosed in the above embodiment of the present invention.

[0175] In one embodiment, the processor 711 includes one or more processing cores (e.g., a 4-core processor, an 8-core processor, etc.). The processor 711 is implemented in at least one hardware form, such as a DSP (Digital Signal Processing), an FPGA (Field-Programmable Gate Array), or a PLA (Programmable Logic Array). The processor 711 may also include a main processor and a coprocessor. The main processor is a processor for processing active data, also referred to as a CPU (Central Processing Unit). The coprocessor is a low-power processor for processing standby data. In some embodiments, the processor 711 integrates a GPU (Graphics Processing Unit), which is responsible for rendering and drawing display content.

[0176] In one embodiment, the base station optionally includes a peripheral interface 713 and one or more peripherals. The processor 711 and the peripheral interface 713 are connected via a bus or signal lines. Each peripheral may be connected to the peripheral interface 713 via a bus, signal line, or circuit board. The peripherals may include at least one of a radio frequency (RF) circuit 714 and a power supply 715.

[0177] The RF circuitry 714 is used to receive and transmit RF (Radio Frequency) signals, i.e., electromagnetic signals. The RF circuitry 714 communicates with communication networks and other communication devices via electromagnetic signals. The RF circuitry 714 converts electrical signals into electromagnetic signals for transmission, or converts received electromagnetic signals into electrical signals. Optionally, the RF circuitry 814 includes an antenna system, an RF transceiver, one or more amplifiers, tuners, oscillators, a digital signal processor, a SIM card, etc. The RF circuitry 814 can communicate with user devices via at least one wireless communication protocol, including, but not limited to, the World Wide Web, metropolitan area networks, intranets, various generations of cellular networks (2G, 3G, 4G, and 5G), wireless local area networks, and / or wireless fidelity (WiFi) networks.

[0178] The power supply 715 is used to provide power to each component in the base station, and may be an AC power supply, a DC power supply, a disposable battery, or a rechargeable battery.

[0179] For example, when processor 711 executes the machine-executable instructions, it is configured to control RF circuitry 714 to perform the following steps: transmitting resource configuration information corresponding to a CSI-RS resource set to a user equipment; and causing the user equipment to receive a CSI-RS based on the CSI-RS resources in the CSI-RS resource set by transmitting a CSI-RS to the user equipment based on the CSI-RS resources in the CSI-RS resource set, where the resource configuration information is information for indicating a CSI-RS resource set to be used by the user equipment, the CSI-RS resource set includes CSI-RS resources located in a subband full duplex (SBFD) symbol, and the CSI-RS resources are located beyond a downlink subband of the SBFD symbol or within the downlink subband of the SBFD symbol.

[0180] Based on the same application concept as the above method, one embodiment of the present invention provides a user device. Referring to Figure 7B, the user device includes a processor 721 and a machine-readable storage medium 722. The machine-readable storage medium 722 stores machine-executable instructions executable by the processor 721. The processor 721 is configured to execute the machine-executable instructions to implement the SRS transmission method disclosed in the above embodiment of the present invention.

[0181] In one embodiment, the processor 721 includes one or more processing cores (e.g., a 4-core processor, an 8-core processor, etc.). The processor 721 may be implemented in at least one hardware form of a DSP, an FPGA, or a PLA. The processor 721 may also include a main processor and a coprocessor.

[0182] In one embodiment, the user device further includes a peripherals interface 723 and one or more peripherals. The processor 721 and the peripherals interface 723 may be connected via a bus or signal lines. Each peripheral may be connected to the peripherals interface 723 via a bus, signal lines, or circuit board. The peripherals may include at least one of a radio frequency (RF) circuit 724, a touchscreen display 725, a camera component 726, and a power source 727.

[0183] The RF circuitry 724 is used to receive and transmit RF signals, i.e., electromagnetic signals. The RF circuitry 724 communicates with communication networks and other communication devices via electromagnetic signals. The RF circuitry 724 converts electrical signals into electromagnetic signals for transmission, or converts received electromagnetic signals into electrical signals. Optionally, the RF circuitry 724 includes an antenna system, an RF transceiver, one or more amplifiers, tuners, oscillators, a digital signal processor, a SIM card, etc. The RF circuitry 724 can communicate with base stations via at least one wireless communication protocol, including, but not limited to, the World Wide Web, metropolitan area networks, intranets, future generations of cellular networks, wireless LANs, and / or Wi-Fi.

[0184] The display 725 is used to display a user interface (UI). The UI may include graphics, text, icons, videos, and any combination thereof. If the display 725 is a touchscreen display, the display 725 is further capable of detecting touch signals on or above the surface of the display 725. The touch signals may be input as control signals to the processor 721 for processing. In this case, the display 725 may also be used to provide virtual buttons and / or a virtual keyboard (also referred to as soft buttons and / or a soft keyboard).

[0185] In some embodiments, there is one display 725 and it is located on the front panel of the user device. In other embodiments, there are at least two displays 725 and they are located on different surfaces of the user device or have a folding design. In still other embodiments, the display 725 is a flexible display and is located on a curved or folding surface of the user device. Furthermore, the display 725 is located on a non-rectangular, irregularly shaped screen. The display 725 may be made of materials such as LCD (Liquid Crystal Display), OLED (Organic Light-Emitting Diode), etc.

[0186] The camera component 726 is used to capture images or videos. Optionally, the camera component 726 includes a front camera and a rear camera. Typically, the front camera is located on the front panel of the user device, and the rear camera is located on the back of the user device. In some embodiments, there are at least two rear cameras, each of which can be a main camera, a depth camera, a wide-angle camera, or a telephoto camera. The main camera and the depth camera can be combined to achieve a background blur function, or the main camera and the wide-angle camera can be combined to achieve panoramic photography, virtual reality (VR) photography, or other fusion photography functions. In some embodiments, the camera component 726 further includes 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-color light flash and a cool-color light flash, which can be used to compensate for light intensity under different color temperatures.

[0187] The power source 727 is used to provide power to each component in the user device. The power source 727 may be an AC power source, a DC power source, a disposable battery, or a rechargeable battery. If the power source 727 includes a rechargeable battery, the rechargeable battery may be a wired rechargeable battery or a wireless rechargeable battery. A wired rechargeable battery is a battery that is charged via a wired cable, and a wireless rechargeable battery is a battery that is charged via a wireless charging coil. The rechargeable battery may also be used to support fast charging technology.

[0188] For example, when processor 721 executes the machine-executable instructions, it is configured to control RF circuitry 724 to perform the following steps: receiving resource configuration information corresponding to a CSI-RS resource set transmitted from a base station; and receiving the CSI-RS transmitted from the base station based on CSI-RS resources in the CSI-RS resource set, where the resource configuration information is information for indicating the CSI-RS resource set, the CSI-RS resource set includes CSI-RS resources located in a subband full duplex (SBFD) symbol, and the CSI-RS resources are located beyond a downlink subband of the SBFD symbol or within the downlink subband of the SBFD symbol.

[0189] Based on the same application concept as the above method, one embodiment of the present invention further provides a machine-readable storage medium, which stores some computer instructions, and when the computer instructions are executed by a processor, the SRS transmission method disclosed in the above embodiment of the present invention is implemented.

[0190] Here, 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, etc. For example, the machine-readable storage medium may be a RAM (Random Access Memory), a volatile memory, a non-volatile memory, a flash memory, a storage drive (e.g., a hard disk drive), a solid-state drive, any type of storage disk (e.g., an optical disk, a DVD, etc.), or a similar storage medium, or a combination thereof.

[0191] The systems, devices, modules, or units described in the above embodiments may be specifically realized by a computer entity or a product having some function. A typical realizing device is a computer, and the specific form of the computer may be a personal computer, a laptop computer, a mobile phone, a camera phone, a smartphone, a personal digital assistant, a media player, a navigation device, an email sending / receiving device, a game console, a tablet PC, a wearable device, or any combination of these devices.

[0192] The above description is merely an example of the present invention and is not intended to limit the present invention. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A channel state information reference signal (CSI-RS) transmission method applied to a user equipment, comprising: receiving resource configuration information corresponding to a CSI-RS resource set transmitted from a base station; receiving a CSI-RS transmitted from the base station based on the CSI-RS resources in the CSI-RS resource set; wherein the resource configuration information is information for indicating the CSI-RS resource set, the CSI-RS resource set includes CSI-RS resources located in a subband full duplex (SBFD) symbol, and the CSI-RS resources are located beyond a downlink subband of the SBFD symbol or within a downlink subband of the SBFD symbol. A CSI-RS transmission method.

2. the resource configuration information includes first resource configuration information corresponding to a first CSI-RS resource set, the first resource configuration information being information for indicating a first CSI-RS resource set, the first CSI-RS resource set including a first-type CSI-RS resource located in a normal symbol and a second-type CSI-RS resource located in an SBFD symbol, and the second-type CSI-RS resource exceeds a range of a downlink subband of the SBFD symbol; Or, the resource configuration information includes second resource configuration information corresponding to a second CSI-RS resource set and third resource configuration information corresponding to a third CSI-RS resource set, the second resource configuration information is information for indicating the second CSI-RS resource set, and the third resource configuration information is information for indicating the third CSI-RS resource set, wherein the second CSI-RS resource set includes a third-type CSI-RS resource located in an SBFD symbol, the third-type CSI-RS resource is located in a downlink subband of the SBFD symbol, and the third CSI-RS resource set includes a fourth-type CSI-RS resource located in a normal symbol.

2. The method of claim 1 .

3. When the second-type CSI-RS resource includes a first partial resource located in a downlink subband of an SBFD symbol and a second partial resource located in an uplink subband or a guard band of the SBFD symbol, receiving a CSI-RS transmitted from the base station based on a second type of CSI-RS resource in the first CSI-RS resource set, receiving a CSI-RS based on a first partial resource and a second partial resource of the second type of CSI-RS resource when downlink data transmission outside the downlink subband of the SBFD symbol is permitted; Or, prohibiting reception of the CSI-RS based on the first partial resource and the second partial resource of the second type of CSI-RS resource, or receiving the CSI-RS based on the first partial resource of the second type of CSI-RS resource and prohibiting reception of the CSI-RS based on the second partial resource of the second type of CSI-RS resource, when downlink data transmission outside the downlink subband of the SBFD symbol is not allowed.

3. The method of claim 2.

4. After receiving a CSI-RS based on a first partial resource of the second type of CSI-RS resource and prohibiting reception of a CSI-RS based on a second partial resource of the second type of CSI-RS resource, the method further comprises: measuring a CSI-RS received in a first partial resource of the second-type CSI-RS resource to obtain first channel state information; and transmitting the first channel state information to the base station; After prohibiting reception of CSI-RS based on the first partial resource and the second partial resource of the second type of CSI-RS resource, the method further comprises: performing a measurement based on a CSI-RS that does not overlap with an uplink subband or a guard band in a previous period, determining a measurement result as channel state information for a current period, and transmitting the channel state information to the base station; 4. The method of claim 3.

5. the method further includes: after receiving a CSI-RS transmitted from the base station based on a first type of CSI-RS resource in the first CSI-RS resource set, measuring the CSI-RS received on the first type of CSI-RS resource to obtain second channel state information, and transmitting the second channel state information to the base station; wherein transmitting the first channel state information to the base station and transmitting the second channel state information to the base station comprises: When the first channel state information includes a plurality of first Layer 1 Reference Signal Received Powers (L1-RSRPs) and the second channel state information includes a plurality of second L1-RSRPs, Selecting N first L1-RSRPs from the plurality of first L1-RSRPs and selecting N second L1-RSRPs from the plurality of second L1-RSRPs, and transmitting the N first L1-RSRPs and the N second L1-RSRPs to the base station; or selecting 2N L1-RSRPs from the plurality of first L1-RSRPs and the plurality of second L1-RSRPs, and transmitting the 2N L1-RSRPs to the base station; and / or if the first channel state information comprises a plurality of first Layer 1 signal-to-interference-and-noise ratios (L1-SINRs) and the second channel state information comprises a plurality of second L1-SINRs; Selecting N first L1-SINRs from the plurality of first L1-SINRs and selecting N second L1-SINRs from the plurality of second L1-SINRs, and transmitting the N first L1-SINRs and the N second L1-SINRs to the base station; or selecting 2N L1-SINRs from the plurality of first L1-SINRs and the plurality of second L1-SINRs, and transmitting the 2N L1-SINRs to the base station; 5. The method of claim 4.

6. Obtaining first channel state information by measuring a CSI-RS received in a first partial resource of the second type CSI-RS resource includes: When the first partial resource of the second-type CSI-RS resource corresponds to at least one CSI subband, for each CSI subband, prohibiting measurement of a CSI-RS received in the CSI subband if the CSI subband completely overlaps with an uplink subband or a guard band of an SBFD symbol; If the CSI subband does not overlap with an uplink subband or a guard band of an SBFD symbol, measure a CSI-RS received in the CSI subband to obtain a measurement result for the CSI subband; If the CSI subband partially overlaps with an uplink subband or a guard band of an SBFD symbol, prohibiting measurement of CSI-RS received in the CSI subbands; or determining whether to measure a CSI-RS received in the CSI subband based on a size of a non-overlapping resource of the CSI subband, and if so, measuring the CSI-RS received in the CSI subband to obtain a measurement result of the CSI subband; and if not, prohibiting measurement of the CSI-RS received in the CSI subband; determining the first channel state information based on measurements of each CSI subband.

5. The method of claim 4.

7. The method further comprises: receiving first indication information transmitted from the base station; receiving second instruction information sent from the base station when the first instruction information instructs transmitting a CSI-RS based on a first partial resource of a second type of CSI-RS resource and prohibiting transmission of a CSI-RS based on a second partial resource of the second type of CSI-RS resource; wherein the first indication information is used to indicate prohibition of CSI-RS transmission based on first and second partial resources of the second-type CSI-RS resources, or to indicate transmission of CSI-RS based on the first partial resources of the second-type CSI-RS resources and prohibition of CSI-RS transmission based on the second partial resources of the second-type CSI-RS resources; the second indication information is used to indicate prohibiting measurement of a CSI-RS received in a CSI subband overlapping with an uplink subband or a guard band, or to indicate determining whether to measure a CSI-RS received in a CSI subband based on a size of a non-overlapping resource of the CSI subband.

7. The method of claim 6.

8. the method further includes: after receiving a CSI-RS transmitted from the base station based on a first type of CSI-RS resource in the first CSI-RS resource set, measuring the CSI-RS received on the first type of CSI-RS resource to obtain second channel state information, and transmitting the second channel state information to the base station; wherein the first channel state information and the second channel state information are transmitted to the base station via different uplink resources or are transmitted to the base station via the same uplink resource.

5. The method of claim 4.

9. the third type of CSI-RS resource includes only resources located within a downlink subband of an SBFD symbol; When the third-type CSI-RS resource occupies only contiguous resources of a downlink subband, the second resource configuration information includes a resource block (RB) start position and an RB occupation number corresponding to the contiguous resources; When the third type CSI-RS resource occupies two non-contiguous resources of a downlink subband, the second resource configuration information includes an RB start position and an occupying number of RBs corresponding to each of the two resources.

3. The method of claim 2.

10. an RB start position corresponding to the third-type CSI-RS resource is an integer multiple of a first value, and an occupied number of RBs corresponding to the third-type CSI-RS resource is equal to or greater than a second value, and an occupied number of RBs corresponding to the third-type CSI-RS resource is an integer multiple of the first value; Or, an RB start position corresponding to the third type CSI-RS resource is a start position of a downlink subband of an SBFD symbol, and an RB occupation number corresponding to the third type CSI-RS resource is an arbitrary value; Here, if the capability parameter of the user equipment indicates that it has the capability to support an arbitrary RB start position, the RB start position corresponding to the third type CSI-RS resource is a start position of a downlink subband of an SBFD symbol, and the number of occupied RBs corresponding to the third type CSI-RS resource is an arbitrary value; If the capability parameter of the user equipment indicates that the user equipment does not have the capability to support any RB starting position, the RB starting position corresponding to the third-type CSI-RS resource is an integer multiple of a first value, and the number of occupied RBs corresponding to the third-type CSI-RS resource is equal to or greater than a second value, and the number of occupied RBs corresponding to the third-type CSI-RS resource is an integer multiple of the first value.

10. The method of claim 9.

11. The method further comprises: receiving third indication information transmitted from the base station; and / or receiving fourth indication information transmitted from the base station; wherein the third indication information is used to indicate that downlink data transmission outside the downlink subband of an SBFD symbol is permitted or to indicate that downlink data transmission outside the downlink subband of an SBFD symbol is not permitted; the fourth indication information is used to indicate that uplink data transmission outside the uplink subband of the SBFD symbol is permitted, or to indicate that uplink data transmission outside the uplink subband of the SBFD symbol is not permitted.

11. The method according to any one of claims 1 to 10.

12. A channel state information reference signal (CSI-RS) transmission method applied to a base station, comprising: transmitting resource configuration information corresponding to the CSI-RS resource set to a user equipment; transmitting a CSI-RS to the user equipment based on CSI-RS resources in the CSI-RS resource set, thereby causing the user equipment to receive a CSI-RS based on CSI-RS resources in the CSI-RS resource set; wherein the resource configuration information is information for indicating a CSI-RS resource set to be used by the user equipment, the CSI-RS resource set includes a CSI-RS resource located in a subband full duplex (SBFD) symbol, and the CSI-RS resource is located beyond a downlink subband of the SBFD symbol or within the downlink subband of the SBFD symbol. A CSI-RS transmission method.

13. The step of transmitting resource configuration information corresponding to the CSI-RS resource set to the user equipment includes: If the user equipment is compatible with a first CSI-RS resource set, transmitting first resource configuration information corresponding to the first CSI-RS resource set to the user equipment, where the first CSI-RS resource set includes a first-type CSI-RS resource located in a normal symbol and a second-type CSI-RS resource located in an SBFD symbol, and the second-type CSI-RS resource exceeds a range of a downlink subband of the SBFD symbol; Or, and if the user equipment supports a second CSI-RS resource set and a third CSI-RS resource set, transmitting, to the user equipment, 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, wherein the second CSI-RS resource set includes a third-type CSI-RS resource located in an SBFD symbol, the third-type CSI-RS resource is located in a downlink subband of the SBFD symbol, and the third CSI-RS resource set includes a fourth-type CSI-RS resource located in a normal symbol.

13. The method of claim 12.

14. When the second-type CSI-RS resource includes a first partial resource located in a downlink subband of an SBFD symbol and a second partial resource located in an uplink subband or a guard band of the SBFD symbol, transmitting a CSI-RS to the user equipment based on a second type of CSI-RS resource in the first CSI-RS resource set; transmitting a CSI-RS based on a first partial resource and a second partial resource of the second type of CSI-RS resource when downlink data transmission outside the downlink subband of the SBFD symbol is permitted; Or, prohibiting transmission of the CSI-RS based on the first partial resource and the second partial resource of the second-type CSI-RS resource, or transmitting the CSI-RS based on the first partial resource of the second-type CSI-RS resource and prohibiting transmission of the CSI-RS based on the second partial resource of the second-type CSI-RS resource, when downlink data transmission outside the downlink subband of the SBFD symbol is not allowed.

14. The method of claim 13.

15. The method further comprises: sending a first indication to the user device; If the first indication information instructs transmitting a CSI-RS based on a first partial resource of a second type of CSI-RS resource and prohibiting transmission of a CSI-RS based on a second partial resource of the second type of CSI-RS resource, sending second indication information to the user equipment; wherein the first indication information is used to indicate prohibition of CSI-RS transmission based on first and second partial resources of the second-type CSI-RS resources, or to indicate transmission of CSI-RS based on the first partial resources of the second-type CSI-RS resources and prohibition of CSI-RS transmission based on the second partial resources of the second-type CSI-RS resources; the second indication information is used to indicate prohibiting measurement of a CSI-RS received in a CSI subband overlapping with an uplink subband or a guard band, or to indicate determining whether to measure a CSI-RS received in a CSI subband based on a size of a non-overlapping resource of the CSI subband.

15. The method of claim 14.

16. the third type of CSI-RS resource includes only resources located within a downlink subband of an SBFD symbol; When the third-type CSI-RS resource occupies only contiguous resources of a downlink subband, the second resource configuration information includes a resource block (RB) start position and an RB occupation number corresponding to the contiguous resources; When the third type CSI-RS resource occupies two non-contiguous resources of a downlink subband, the second resource configuration information includes an RB start position and an occupying number of RBs corresponding to each of the two resources.

14. The method of claim 13.

17. an RB start position corresponding to the third-type CSI-RS resource is an integer multiple of a first value, and an occupied number of RBs corresponding to the third-type CSI-RS resource is equal to or greater than a second value, and an occupied number of RBs corresponding to the third-type CSI-RS resource is an integer multiple of the first value; Or, an RB start position corresponding to the third type CSI-RS resource is a start position of a downlink subband of an SBFD symbol, and an RB occupation number corresponding to the third type CSI-RS resource is an arbitrary value; Here, if the capability parameter of the user equipment indicates that it has the capability to support an arbitrary RB start position, the RB start position corresponding to the third type CSI-RS resource is a start position of a downlink subband of an SBFD symbol, and the number of occupied RBs corresponding to the third type CSI-RS resource is an arbitrary value; If the capability parameter of the user equipment indicates that the user equipment does not have the capability to support any RB starting position, the RB starting position corresponding to the third-type CSI-RS resource is an integer multiple of a first value, and the number of occupied RBs corresponding to the third-type CSI-RS resource is equal to or greater than a second value, and the number of occupied RBs corresponding to the third-type CSI-RS resource is an integer multiple of the first value.

17. The method of claim 16.

18. The method further comprises: sending a third indication to the user device; and / or transmitting fourth indication information to the user device; wherein the third indication information is used to indicate that downlink data transmission outside the downlink subband of an SBFD symbol is permitted or to indicate that downlink data transmission outside the downlink subband of an SBFD symbol is not permitted; the fourth indication information is used to indicate that uplink data transmission outside the uplink subband of the SBFD symbol is permitted, or to indicate that uplink data transmission outside the uplink subband of the SBFD symbol is not permitted.

18. The method according to any one of claims 12 to 17.

19. Transmitting the CSI-RS based on a first partial resource of the second type of CSI-RS resource and prohibiting transmission of the CSI-RS based on a second partial resource of the second type of CSI-RS resource includes: determining a target transmission power based on a maximum transmission power of the second-type CSI-RS resource, or determining a target transmission power based on the maximum transmission power of the second-type CSI-RS resource and a resource ratio; transmitting a CSI-RS based on the first partial resource under the target transmission power; wherein the resource ratio is a resource ratio between the first partial resource and the second type CSI-RS resource; 15. The method of claim 14.

20. A channel state information reference signal (CSI-RS) transmission device applied to a user equipment, a first receiving module configured to receive resource configuration information corresponding to a CSI-RS resource set transmitted from a base station; a second receiving module configured to receive a CSI-RS transmitted from the base station based on a CSI-RS resource in the CSI-RS resource set; wherein the resource configuration information is information for indicating the CSI-RS resource set, the CSI-RS resource set includes CSI-RS resources located in a subband full duplex (SBFD) symbol, and the CSI-RS resources are located beyond a downlink subband of the SBFD symbol or within a downlink subband of the SBFD symbol. A CSI-RS transmission device characterized by:

21. the resource configuration information includes first resource configuration information corresponding to a first CSI-RS resource set, the first resource configuration information being information for indicating a first CSI-RS resource set, the first CSI-RS resource set including a first-type CSI-RS resource located in a normal symbol and a second-type CSI-RS resource located in an SBFD symbol, and the second-type CSI-RS resource exceeds a range of a downlink subband of the SBFD symbol; Or, the resource configuration information includes second resource configuration information corresponding to a second CSI-RS resource set and third resource configuration information corresponding to a third CSI-RS resource set, the second resource configuration information is information for indicating the second CSI-RS resource set, and the third resource configuration information is information for indicating the third CSI-RS resource set, wherein the second CSI-RS resource set includes a third-type CSI-RS resource located in an SBFD symbol, the third-type CSI-RS resource is located in a downlink subband of the SBFD symbol, and the third CSI-RS resource set includes a fourth-type CSI-RS resource located in a normal symbol.

21. The apparatus of claim 20.

22. When the second-type CSI-RS resource includes a first partial resource located in a downlink subband of an SBFD symbol and a second partial resource located in an uplink subband or a guard band of the SBFD symbol, When the second receiving module receives the CSI-RS transmitted from the base station based on a second type of CSI-RS resource in the first CSI-RS resource set, configured to receive a CSI-RS based on a first partial resource and a second partial resource of the second type of CSI-RS resource when downlink data transmission outside the downlink subband of the SBFD symbol is permitted; Or, configured to prohibit reception of the CSI-RS based on the first partial resource and the second partial resource of the second-type CSI-RS resource, or to receive the CSI-RS based on the first partial resource of the second-type CSI-RS resource and prohibit reception of the CSI-RS based on the second partial resource of the second-type CSI-RS resource, when downlink data transmission outside the downlink subband of the SBFD symbol is not permitted; 22. The apparatus of claim 21 .

23. The apparatus further comprises: After receiving a CSI-RS based on a first partial resource of the second type of CSI-RS resource and prohibiting reception of a CSI-RS based on a second partial resource of the second type of CSI-RS resource, measuring a CSI-RS received in a first partial resource of the second-type CSI-RS resource to obtain first channel state information, and transmitting the first channel state information to the base station; After prohibiting reception of CSI-RS based on the first partial resource and the second partial resource of the second type CSI-RS resource, a transmitting module configured to perform a measurement based on a CSI-RS that does not overlap with an uplink subband or a guard band in a previous period, determine a measurement result as channel state information for a current period, and transmit the channel state information to the base station; 23. The apparatus of claim 22.

24. the transmitting module is further configured to, after receiving a CSI-RS transmitted from the base station based on a first type of CSI-RS resource in the first CSI-RS resource set, measure the CSI-RS received on the first type of CSI-RS resource to obtain second channel state information, and transmit the second channel state information to the base station; wherein, when the transmitting module transmits the first channel state information to the base station and the second channel state information to the base station, When the first channel state information includes a plurality of first Layer 1 Reference Signal Received Powers (L1-RSRPs) and the second channel state information includes a plurality of second L1-RSRPs, Selecting N first L1-RSRPs from the plurality of first L1-RSRPs and selecting N second L1-RSRPs from the plurality of second L1-RSRPs, and transmitting the N first L1-RSRPs and the N second L1-RSRPs to the base station; or selecting 2N L1-RSRPs from the plurality of first L1-RSRPs and the plurality of second L1-RSRPs, and transmitting the 2N L1-RSRPs to the base station; and / or if the first channel state information comprises a plurality of first Layer 1 signal-to-interference-and-noise ratios (L1-SINRs) and the second channel state information comprises a plurality of second L1-SINRs; Selecting N first L1-SINRs from the plurality of first L1-SINRs and selecting N second L1-SINRs from the plurality of second L1-SINRs, and transmitting the N first L1-SINRs and the N second L1-SINRs to the base station; or configured to select 2N L1-SINRs from the plurality of first L1-SINRs and the plurality of second L1-SINRs, and transmit the 2N L1-SINRs to the base station; 24. The apparatus of claim 23.

25. When the transmitting module measures a CSI-RS received in a first partial resource of the second-type CSI-RS resource to obtain first channel state information, When the first partial resource of the second-type CSI-RS resource corresponds to at least one CSI subband, for each CSI subband, prohibiting measurement of a CSI-RS received in the CSI subband if the CSI subband completely overlaps with an uplink subband or a guard band of an SBFD symbol; If the CSI subband does not overlap with an uplink subband or a guard band of an SBFD symbol, measure a CSI-RS received in the CSI subband to obtain a measurement result for the CSI subband; If the CSI subband partially overlaps with an uplink subband or a guard band of an SBFD symbol, prohibiting measurement of CSI-RS received in the CSI subbands, or determining whether to measure a CSI-RS received in the CSI subband based on a size of a non-overlapping resource of the CSI subband, and if the CSI-RS is to be measured, measuring the CSI-RS received in the CSI subband to obtain a measurement result of the CSI subband; and if the CSI-RS is not to be measured, prohibiting measurement of the CSI-RS received in the CSI subband; and configured to determine the first channel state information based on measurements of each CSI subband.

24. The apparatus of claim 23.

26. the first receiving module is further configured to receive first indication information sent from the base station, where the first indication information is used to indicate prohibiting transmission of a CSI-RS based on first and second partial resources of a second type of CSI-RS resource, or to indicate transmitting a CSI-RS based on the first partial resources of the second type of CSI-RS resource and prohibiting transmission of a CSI-RS based on the second partial resources of the second type of CSI-RS resource; When the first instruction information instructs transmitting a CSI-RS based on a first partial resource of a second type of CSI-RS resource and prohibiting transmission of a CSI-RS based on a second partial resource of the second type of CSI-RS resource, the first receiving module is further configured to receive second instruction information sent from the base station; wherein the second indication information is used to indicate prohibiting measurement of a CSI-RS received in a CSI subband overlapping with an uplink subband or a guard band, or to indicate determining whether to measure a CSI-RS received in a CSI subband based on a size of a non-overlapping resource of the CSI subband.

26. The apparatus of claim 25.

27. the transmitting module is further configured to, after receiving a CSI-RS transmitted from the base station based on a first type of CSI-RS resource in the first CSI-RS resource set, measure the CSI-RS received on the first type of CSI-RS resource to obtain second channel state information, and transmit the second channel state information to the base station; wherein the first channel state information and the second channel state information are transmitted to the base station via different uplink resources or are transmitted to the base station via the same uplink resource.

24. The apparatus of claim 23.

28. the third type of CSI-RS resource includes only resources located within a downlink subband of an SBFD symbol; When the third-type CSI-RS resource occupies only contiguous resources of a downlink subband, the second resource configuration information includes a resource block (RB) start position and an RB occupation number corresponding to the contiguous resources; When the third type CSI-RS resource occupies two non-contiguous resources of a downlink subband, the second resource configuration information includes an RB start position and an occupying number of RBs corresponding to each of the two resources.

22. The apparatus of claim 21 .

29. an RB start position corresponding to the third-type CSI-RS resource is an integer multiple of a first value, and an occupied number of RBs corresponding to the third-type CSI-RS resource is equal to or greater than a second value, and an occupied number of RBs corresponding to the third-type CSI-RS resource is an integer multiple of the first value; Or, an RB start position corresponding to the third type CSI-RS resource is a start position of a downlink subband of an SBFD symbol, and an RB occupation number corresponding to the third type CSI-RS resource is an arbitrary value; Here, if the capability parameter of the user equipment indicates that it has the capability to support an arbitrary RB start position, the RB start position corresponding to the third type CSI-RS resource is a start position of a downlink subband of an SBFD symbol, and the number of occupied RBs corresponding to the third type CSI-RS resource is an arbitrary value; If the capability parameter of the user equipment indicates that the user equipment does not have the capability to support any RB starting position, the RB starting position corresponding to the third-type CSI-RS resource is an integer multiple of a first value, and the number of occupied RBs corresponding to the third-type CSI-RS resource is equal to or greater than a second value, and the number of occupied RBs corresponding to the third-type CSI-RS resource is an integer multiple of the first value.

29. The apparatus of claim 28.

30. The first receiving module is further configured to receive third indication information sent from the base station, where the third indication information is used to indicate that downlink data transmission outside of a downlink subband of an SBFD symbol is permitted or to indicate that downlink data transmission outside of a downlink subband of an SBFD symbol is not permitted; and / or the first receiving module is further configured to receive fourth indication information transmitted from the base station, wherein the fourth indication information is used to indicate allowing uplink data transmission outside the uplink subband of an SBFD symbol or to indicate not allowing uplink data transmission outside the uplink subband of an SBFD symbol; 30. Apparatus according to any one of claims 20 to 29.

31. A channel state information reference signal (CSI-RS) transmission device applied to a base station, a first transmitting module configured to transmit resource configuration information corresponding to a CSI-RS resource set to a user equipment; a second transmission module configured to transmit a CSI-RS to the user equipment based on CSI-RS resources in the CSI-RS resource set, thereby causing the user equipment to receive the CSI-RS based on the CSI-RS resources in the CSI-RS resource set; wherein the resource configuration information is information for indicating a CSI-RS resource set to be used by the user equipment, the CSI-RS resource set includes a CSI-RS resource located in a subband full duplex (SBFD) symbol, and the CSI-RS resource is located beyond a downlink subband of the SBFD symbol or within the downlink subband of the SBFD symbol. A CSI-RS transmission device characterized by:

32. When the first transmission module transmits resource configuration information corresponding to the CSI-RS resource set to the user equipment, configured to transmit, to the user equipment, first resource configuration information corresponding to the first CSI-RS resource set when the user equipment is compatible with a first CSI-RS resource set, where the first CSI-RS resource set includes a first-type CSI-RS resource located in a normal symbol and a second-type CSI-RS resource located in an SBFD symbol, and the second-type CSI-RS resource exceeds a downlink subband of the SBFD symbol; Or, configured to transmit, to the user equipment, 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, when the user equipment supports a second CSI-RS resource set and a third CSI-RS resource set, where the second CSI-RS resource set includes a third-type CSI-RS resource located in an SBFD symbol, the third-type CSI-RS resource is located in a downlink subband of the SBFD symbol, and the third CSI-RS resource set includes a fourth-type CSI-RS resource located in a normal symbol; 32. The apparatus of claim 31 .

33. When the second-type CSI-RS resource includes a first partial resource located in a downlink subband of an SBFD symbol and a second partial resource located in an uplink subband or a guard band of the SBFD symbol, When the second transmission module transmits a CSI-RS to the user equipment based on a second type of CSI-RS resource in the first CSI-RS resource set, configured to transmit a CSI-RS based on a first partial resource and a second partial resource of the second type of CSI-RS resource when downlink data transmission outside the downlink subband of the SBFD symbol is permitted; Or, configured to prohibit transmission of the CSI-RS based on the first partial resource and the second partial resource of the second-type CSI-RS resource, or to transmit the CSI-RS based on the first partial resource of the second-type CSI-RS resource and prohibit transmission of the CSI-RS based on the second partial resource of the second-type CSI-RS resource, when downlink data transmission outside the downlink subband of the SBFD symbol is not permitted; 33. The apparatus of claim 32.

34. the first transmission module is further configured to send first indication information to the user equipment, where the first indication information is used to indicate prohibiting transmission of a CSI-RS based on first and second partial resources of a second type of CSI-RS resource, or to indicate transmitting a CSI-RS based on the first partial resources of the second type of CSI-RS resource and prohibiting transmission of a CSI-RS based on the second partial resources of the second type of CSI-RS resource; When the first indication information instructs transmitting a CSI-RS based on a first partial resource of a second type of CSI-RS resource and prohibiting transmission of a CSI-RS based on a second partial resource of the second type of CSI-RS resource, the first transmission module is further configured to send second indication information to the user equipment; wherein the second indication information is used to indicate prohibiting measurement of a CSI-RS received in a CSI subband overlapping with an uplink subband or a guard band, or to indicate determining whether to measure a CSI-RS received in a CSI subband based on a size of a non-overlapping resource of the CSI subband.

34. The apparatus of claim 33.

35. the third type of CSI-RS resource includes only resources located within a downlink subband of an SBFD symbol; When the third-type CSI-RS resource occupies only contiguous resources of a downlink subband, the second resource configuration information includes a resource block (RB) start position and an RB occupation number corresponding to the contiguous resources; When the third type CSI-RS resource occupies two non-contiguous resources of a downlink subband, the second resource configuration information includes an RB start position and an occupying number of RBs corresponding to each of the two resources.

33. The apparatus of claim 32.

36. an RB start position corresponding to the third-type CSI-RS resource is an integer multiple of a first value, and an occupied number of RBs corresponding to the third-type CSI-RS resource is equal to or greater than a second value, and an occupied number of RBs corresponding to the third-type CSI-RS resource is an integer multiple of the first value; Or, an RB start position corresponding to the third type CSI-RS resource is a start position of a downlink subband of an SBFD symbol, and an RB occupation number corresponding to the third type CSI-RS resource is an arbitrary value; Here, if the capability parameter of the user equipment indicates that it has the capability to support an arbitrary RB start position, the RB start position corresponding to the third type CSI-RS resource is a start position of a downlink subband of an SBFD symbol, and the number of occupied RBs corresponding to the third type CSI-RS resource is an arbitrary value; If the capability parameter of the user equipment indicates that the user equipment does not have the capability to support any RB starting position, the RB starting position corresponding to the third-type CSI-RS resource is an integer multiple of a first value, and the number of occupied RBs corresponding to the third-type CSI-RS resource is equal to or greater than a second value, and the number of occupied RBs corresponding to the third-type CSI-RS resource is an integer multiple of the first value.

36. The apparatus of claim 35.

37. the first transmitting module is further configured to transmit third indication information to the user equipment, wherein the third indication information is used to indicate that downlink data transmission outside of a downlink subband of an SBFD symbol is permitted or to indicate that downlink data transmission outside of a downlink subband of an SBFD symbol is not permitted; and and / or the first transmitting module is further configured to transmit 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 an SBFD symbol is permitted or to indicate that uplink data transmission outside the uplink subband of an SBFD symbol is not permitted.

37. Apparatus according to any one of claims 31 to 36.

38. When the second transmission module transmits a CSI-RS based on a first partial resource of the second type of CSI-RS resource and prohibits transmission of a CSI-RS based on a second partial resource of the second type of CSI-RS resource, determining a target transmission power based on a maximum transmission power of the second-type CSI-RS resource, or determining a target transmission power based on a maximum transmission power of the second-type CSI-RS resource and a resource ratio; configured to transmit a CSI-RS based on the first partial resource under the target transmission power; wherein the resource ratio is a resource ratio between the first partial resource and the second type CSI-RS resource; 34. The apparatus of claim 33.

39. A user device comprising a processor and a machine-readable storage medium, the machine-readable storage medium stores machine-executable instructions executable by the processor; The processor is configured to perform the method of any one of claims 1 to 11 by executing the machine-executable instructions. A user device characterized in that:

40. A base station comprising a processor and a machine-readable storage medium, the machine-readable storage medium stores machine-executable instructions executable by the processor; The processor is configured to perform the method of any one of claims 12 to 19 by executing the machine-executable instructions. A base station characterized by:

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