Transmission method, device and terminal of channel state information (CSI)

Abstract

The application discloses a channel state information (CSI) transmission method and device and a terminal, and belongs to the technical field of communication. The method of the application embodiment comprises the following steps: a first terminal receives a first channel state information reference signal (CSI-RS); and the first terminal feeds back channel state information (CSI) corresponding to the first CSI-RS to a second terminal. The CSI carries at least one parameter, i.e., side link (SL) channel state information and SL beam related information.

Description

Technical Field

[0001] This application belongs to the field of communication technology, and specifically relates to a method, apparatus and terminal for transmitting Channel State Information (CSI). Background Technology

[0002] The SideLink (SL) Channel State Information Reference Signal (CSI-RS) can be used to measure the SL channel state between the transmitting User Equipment (UE) and the receiving UE. The channel state measured by the receiving UE can be fed back to the transmitting UE via SL Channel State Information (CSI).

[0003] Currently, SL CSI-RS and CSI feedback are only used for reporting Channel Quality Indicator (CQI) or Rank Indicator (RI), which cannot meet the beamforming requirements in New Radio (NR) SL transmission scenarios. Summary of the Invention

[0004] This application provides a method, apparatus, and terminal for transmitting Channel State Information (CSI), which can solve the beamforming problem in SL transmission scenarios.

[0005] Firstly, a method for transmitting Channel State Information (CSI) is provided, including:

[0006] The first terminal receives the first channel state information reference signal CSI-RS;

[0007] The first terminal feeds back the CSI corresponding to the first CSI-RS to the second terminal; wherein the CSI carries at least one of the following parameters:

[0008] Side link SL channel status information;

[0009] SL beam information.

[0010] Secondly, a method for transmitting Channel State Information (CSI) is provided, including:

[0011] The second terminal sends the first channel state information reference signal (CSI-RS);

[0012] The second terminal receives the CSI corresponding to the first CSI-RS fed back by the first terminal; wherein the CSI carries at least one of the following parameters:

[0013] Side link SL channel status information;

[0014] SL beam information.

[0015] Thirdly, a channel state information (CSI) transmission device is provided, comprising:

[0016] The first receiving module is used to receive the first channel state information reference signal CSI-RS;

[0017] The first transmitting module is used to feed back the CSI corresponding to the first CSI-RS to the second terminal; wherein the CSI carries at least one of the following parameters:

[0018] Side link SL channel status information;

[0019] SL beam information.

[0020] Fourthly, a channel state information (CSI) transmission apparatus is provided, comprising:

[0021] The second transmitting module is used to transmit the first channel state information reference signal CSI-RS;

[0022] The second receiving module is configured to receive the CSI corresponding to the first CSI-RS fed back by the first terminal; wherein the CSI carries at least one of the following parameters:

[0023] Side link SL channel status information;

[0024] SL beam information.

[0025] Fifthly, a terminal is provided, the terminal including a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method as described in the first aspect, or implementing the steps of the method as described in the second aspect.

[0026] In a sixth aspect, a terminal is provided, including a processor and a communication interface, wherein the communication interface is used to receive a first channel state information reference signal (CSI-RS); and to feed back the CSI corresponding to the first CSI-RS to a second terminal; wherein the CSI carries at least one of the following parameters: sidelink SL channel state information; SL beam-related information; or, the communication interface is used to transmit the first channel state information reference signal (CSI-RS); and to receive the CSI corresponding to the first CSI-RS fed back by a first terminal; wherein the CSI carries at least one of the following parameters: sidelink SL channel state information; SL beam-related information.

[0027] A seventh aspect provides a communication system, comprising: a first terminal and a second terminal, wherein the first terminal is configured to perform the steps of the method described in the first aspect, and the second terminal is configured to perform the steps of the method described in the second aspect.

[0028] Eighthly, a readable storage medium is provided, on which a program or instructions are stored, which, when executed by a processor, implement the steps of the method described in the first aspect, or implement the steps of the method described in the second aspect.

[0029] In a ninth aspect, a chip is provided, the chip including a processor and a communication interface coupled to the processor, the processor being configured to run programs or instructions to implement the method as described in the first aspect, or to implement the method as described in the second aspect.

[0030] In a tenth aspect, a computer program / program product is provided, the computer program / program product being stored in a storage medium, the computer program / program product being executed by at least one processor to implement the steps of the method as described in the first aspect, or to implement the steps of the method as described in the second aspect.

[0031] In this embodiment, the first terminal feeds back the CSI corresponding to the first CSI-RS to the second terminal. The CSI carries SL channel state information and / or SL beam-related information to assist the second terminal in performing beam training between terminals, thereby establishing a transmission beam between the first terminal and the second terminal. Attached Figure Description

[0032] Figure 1 A block diagram illustrating a wireless communication system to which embodiments of this application may be applied;

[0033] Figure 2 This is a flowchart illustrating one of the steps of the CSI transmission method provided in an embodiment of this application;

[0034] Figure 3 This is the second flowchart illustrating the steps of the CSI transmission method provided in this application embodiment;

[0035] Figure 4 This indicates a mapping form 1 of a set of CSI-RS resources in the CSI transmission method provided in this application embodiment;

[0036] Figure 5 This indicates a mapping form 2 of a set of CSI-RS resources in the CSI transmission method provided in this application embodiment;

[0037] Figure 6 One of the schematic diagrams illustrating the structure of the device for transmitting CSI according to an embodiment of this application;

[0038] Figure 7 A second schematic diagram illustrating the structure of the device for transmitting CSI according to an embodiment of this application;

[0039] Figure 8 This is a schematic diagram of the structure of a terminal provided in an embodiment of this application;

[0040] Figure 9 This is a second schematic diagram showing the structure of the terminal provided in the embodiments of this application. Detailed Implementation

[0041] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0042] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0043] It is worth noting that the technologies described in this application are not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" in this application are often used interchangeably, and the described technologies can be used with the systems and radio technologies mentioned above, as well as with other systems and radio technologies. The following description describes New Radio (NR) systems for illustrative purposes, and NR terminology is used in most of the following description; however, these technologies can also be applied to applications beyond NR systems, such as 6th generation (6G) radio systems. th Generation 6G communication system.

[0044] Figure 1This diagram illustrates a block diagram of a wireless communication system applicable to embodiments of this application. The wireless communication system includes a terminal 11 and a network-side device 12. The terminals 11 can exchange information via a sidelink (SL). Terminal 11 can be a mobile phone, tablet computer, laptop computer (also known as a notebook computer), personal digital assistant (PDA), handheld computer, netbook, ultra-mobile personal computer (UMPC), mobile internet device (MID), augmented reality (AR) / virtual reality (VR) device, robot, wearable device, vehicle-mounted device (VUE), pedestrian terminal (PUE), smart home (home devices with wireless communication capabilities, such as refrigerators, televisions, washing machines, or furniture), game console, personal computer (PC), ATM, or self-service machine, etc. Wearable devices include: smartwatches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart chains, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. It should be noted that the specific type of terminal 11 is not limited in this application embodiment. Network-side equipment 12 may include access network equipment or core network equipment. Access network equipment 12 may also be referred to as radio access network equipment, radio access network (RAN), radio access network function, or radio access network unit. Access network equipment 12 may include base stations, WLAN access points, or WiFi nodes, etc. Base stations may be referred to as Node B, evolved Node B (eNB), access point, base transceiver station (BTS), radio base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), home B node, home evolved B node, Transmitting Receiving Point (TRP), or any other suitable term in the field, as long as the same technical effect is achieved. The base station is not limited to specific technical terms. It should be noted that this application embodiment only uses a base station in an NR system as an example for description and does not limit the specific type of base station.

[0045] The following description, in conjunction with the accompanying drawings, details the method, apparatus, and terminal for transmitting Channel State Information (CSI) provided in this application, through some embodiments and application scenarios.

[0046] like Figure 2 As shown in the figure, this application provides a method for transmitting Channel State Information (CSI), including:

[0047] Step 201: The first terminal receives the first channel state information reference signal CSI-RS;

[0048] Step 202: The first terminal feeds back the CSI corresponding to the first CSI-RS to the second terminal; wherein the CSI carries at least one of the following parameters:

[0049] Side link SL channel status information;

[0050] SL beam information.

[0051] In an optional embodiment, the first terminal is a receiving terminal (RX UE) in SL communication, and the second terminal is a sending terminal (TX UE) in SL communication.

[0052] As an optional embodiment, the SL channel state information includes at least one of the following:

[0053] Channel Quality Indicator (CQI);

[0054] Rank indicator RI;

[0055] Channel matrix;

[0056] Channel parameters.

[0057] Alternatively, assuming a predefined resource set for beam sweeping is used for broadcasting, the CSI may also carry at least one of the following: measured carrier information, carrier information associated with CSI feedback, and resource pool information.

[0058] As another optional embodiment, the SL beam-related information includes at least one of the following:

[0059] Beam index;

[0060] Reference Signal Identifier (RS ID);

[0061] Resource index;

[0062] Sequence index;

[0063] Layer 1 Reference Signal Received Power (L1-RSRP).

[0064] In at least one embodiment of this application, if beam training is performed on the first terminal side, the first terminal does not need to carry SL beam-related information in the CSI.

[0065] Optionally, if beam training is performed on the first terminal side, and the first CSI-RS is only used for beam measurement, the first terminal does not need to feed back the CSI corresponding to the first CSI-RS; or, if the first CSI-RS is used for both beam measurement and channel measurement, the first terminal feeds back the CSI corresponding to the first CSI-RS, but the CSI does not carry SL beam-related information.

[0066] For example, the first indication information indicates that the first CSI-RS transmission does not require corresponding CSI reporting (i.e., RX UE-side beam training). That is, the first terminal receives the first indication information indicating that the first CSI-RS does not need to report the corresponding CSI; then, based on the indication of the first indication information, the first terminal determines not to feed back the CSI corresponding to the first CSI-RS. Optionally, the first indication information can be carried in an indication field of the CSI request information, or the first indication information can be sent separately by the second terminal; no specific limitation is made here.

[0067] In at least one alternative embodiment of this application, differential coding can be used between multiple CSIs carrying a certain parameter to reduce signaling overhead.

[0068] In at least one embodiment of this application, the method further includes:

[0069] The first terminal determines the quantity carried by the CSI based on the first information; wherein the first information includes any one of the following:

[0070] CSI request information; optionally, CSI request information can be sent via Sidelink Control Information (SCI) or Media Access Control Layer Control Unit (MAC CE);

[0071] CSI reporting time;

[0072] Configuration information of the first CSI-RS;

[0073] Predefined information used to indicate the parameters carried by CSI.

[0074] As an optional embodiment, the first terminal determines the parameters carried by the CSI based on the CSI request information, including:

[0075] The first terminal determines the parameter carried by the CSI request information as the parameter indicated by the parameter indication information based on the parameter indication information carried by the CSI request information.

[0076] In other words, the CSI request information directly indicates the parameters that the CSI is reporting. For example, a new SCI format or MAC CE can be defined, where M fields / codepoints are used for CSI request indication, one of which indicates that the CSI is reporting parameters as CQI / RI, and / or another field / codepoint indicates that the reported parameters are SL beam-related information, and / or another field / codepoint indicates that no CSI reporting is required.

[0077] Alternatively, the first terminal determines the parameters carried by the CSI based on the CSI request information, including:

[0078] The first terminal determines the parameters carried by the CSI based on the CSI configuration indication information carried in the CSI request information as: the parameters corresponding to the CSI configuration indicated by the CSI configuration indication information;

[0079] In other words, there is a correlation between CSI configuration information and parameters reported by CSI. CSI request information indirectly indicates the parameters reported by CSI by indicating the identifier of CSI configuration information.

[0080] Optionally, the CSI configuration indication information is used to indicate the ID of the CSI configuration; the CSI configuration information has its corresponding ID information, and the CSI request information directly indicates the ID of the CSI configuration information. Alternatively, the CSI configuration indication information is used to indicate the item index of the CSI configuration in a first preset list; that is, the first terminal locally stores a first preset list, which includes multiple CSI configuration information, and the CSI request information directly indicates the item index in the list, thereby indicating the CSI configuration information.

[0081] It should be noted that CSI configuration information can be negotiated between terminals via PC5-RRC, or CSI configuration information per pool (based on resource pool) / per BWP (based on bandwidth portion) / per UE (based on terminal) can be configured via RRC, without specific limitations here.

[0082] Alternatively, the first terminal determines the parameters carried by the CSI based on the CSI request information, including:

[0083] The first terminal determines the parameters carried by the CSI request information according to the signaling format of the CSI request information: the parameters corresponding to the signaling format. That is, different CSI reporting parameters are triggered by CSI request information with different signaling formats, and the first terminal identifies the parameters reported by the CSI by distinguishing the signaling formats of the CSI request information.

[0084] For example, CQI / RI reporting is triggered using MAC CE, while beam-related reporting is triggered using [2]. nd stage]SCI.

[0085] For example, both CQI / RI and beam-related reporting are triggered using MAC CE, but the MAC CEs for the two use different logical IDs.

[0086] For example, both CQI / RI and beam-related reporting are triggered using SCI, but the SCIs of the two use different formats.

[0087] As another optional embodiment, the first terminal determines the parameters carried by the CSI based on the CSI reporting time, including:

[0088] The first terminal determines the first time range to which the CSI reporting time belongs;

[0089] The first terminal determines the parameters carried by the CSI according to the first time range as: pre-agreed parameters corresponding to the first time range.

[0090] In other words, within a preset time range, it is agreed that there is only one CSI reporting parameter. When the CSI request information instructs the CSI to report, the parameter reported by the CSI is the CSI parameter agreed upon within the preset time range.

[0091] Optionally, the preset time range is agreed upon by the UEs, for example, through negotiation via signaling such as PC5-RRC or MAC CE.

[0092] Optionally, the CSI request information may be a CSI request indication in 2nd stage SCI format 2-A / 2-B / 2-C.

[0093] As another optional embodiment, the first terminal determines the parameters carried by the CSI based on the configuration information of the first CSI-RS, including:

[0094] The first terminal determines, based on the configuration information of the first CSI-RS, that the parameter carried by the CSI is: the parameter associated with the configuration information of the first CSI-RS;

[0095] The configuration information of the first CSI-RS is indicated by the second terminal.

[0096] In other words, there is a correlation between CSI reporting parameters and CSI-RS configuration information. By instructing the configuration information transmitted by CSI-RS, the corresponding CSI reporting parameters are indicated.

[0097] For example, if the first CSI-RS transmission is a set of CSI-RS resources and the first CSI-RS is transmitted in a scanning form, the CSI reporting parameters corresponding to the first CSI-RS shall at least include SL beam-related information (or, include SL beam-related information and CQI / RI); if the CSI-RS transmission is a CSI-RS resource, the CSI reporting parameters shall only be CQI / RI.

[0098] As another optional embodiment, if the first terminal determines the parameters carried by the CSI based on predefined information used to indicate the parameters carried by the CSI, the parameters carried by the CSI are predefined as SL beam-related information and CQI / RI through the predefined information. For example, after receiving CSI request information, the first terminal always reports a CSI carrying SL beam-related information and CQI / RI.

[0099] In at least one optional embodiment of the present invention, for cases where there is configuration information for multiple CSI-RS (e.g., at least configuration information for CSI-RS configured for beam measurement and / or configuration information for CSI-RS configured for CQI / RI reporting), the method further includes:

[0100] The first terminal determines the configuration information of the first CSI-RS based on the second information; wherein the second information includes at least one of the following:

[0101] The first CSI-RS transmission indication signaling; for example, the transmission indication signaling can be PC5-RRC, or MAC CE, or SCI; wherein, the transmission indication signaling is used to indicate CSI-RS transmission resources;

[0102] The transmission time of the first CSI-RS;

[0103] The configuration information fed back by the Channel State Information (CSI) corresponding to the first CSI-RS.

[0104] Wherein, when the first CSI-RS is used for beam measurement, the configuration information of the first CSI-RS is used to configure or indicate any of the following:

[0105] The transmission resources of the first CSI-RS are a set of CSI-RS resources;

[0106] The first CSI-RS is transmitted within the Physical Side Link Shared Channel (PSSCH).

[0107] In other words, the CSI-RS used for beam measurement can be configured / indicated as a set of CSI-RS resources. Alternatively, the CSI-RS used for beam measurement can be embedded in the PSSCH for transmission.

[0108] For example, in a PSSCH transmission carrying CSI-RS, if the beam direction of the CSI-RS transmission on the PSSCH is inconsistent with the beam direction of the data transmission; for example, if the CSI-RS is transmitted in the form of beam scanning and the data is transmitted in the form of directional beams, the data transmission cannot be mapped to the time domain resources of the CSI-RS transmission in order to ensure the reliability of data transmission.

[0109] As an optional embodiment, the first terminal determines the configuration information of the first CSI-RS according to the transmission indication signaling of the first CSI-RS, including:

[0110] The first terminal determines the configuration information of the first CSI-RS as the configuration information corresponding to the CSI-RS configuration identifier based on the CSI-RS configuration identifier indicated by the transmission indication signaling of the first CSI-RS; that is, the CSI-RS configuration information has corresponding ID information, and the transmission indication signaling can directly indicate the ID.

[0111] Alternatively, the first terminal determines the configuration information of the first CSI-RS as the configuration information corresponding to the item index in the second preset list indicated by the transmission indication signaling of the first CSI-RS; that is, the first terminal has a second preset list stored locally in advance, the second preset list includes multiple CSI configuration information, and the transmission indication signaling of the CSI-RS directly indicates the item index in the list, thereby indicating the CSI configuration information.

[0112] It should be noted that CSI configuration information can be negotiated between terminals via PC5-RRC, or CSI configuration information per pool (based on resource pool) / per BWP (based on bandwidth portion) / per UE (based on terminal) can be configured via RRC, without specific limitations here.

[0113] As another optional embodiment, the first terminal determines the configuration information of the first CSI-RS based on the transmission time of the first CSI-RS, including:

[0114] The first terminal determines the second time range to which the transmission time of the first CSI-RS belongs;

[0115] The first terminal determines the configuration information of the first CSI-RS according to the second time range as: the pre-agreed CSI-RS configuration information corresponding to the second time range.

[0116] In other words, within a preset time range, it is agreed that only one type of CSI-RS configuration information is used. Optionally, the preset time range is agreed upon by the UEs, for example, through negotiation via indication signaling such as PC5-RRC or MAC CE.

[0117] As another optional embodiment, the first terminal determines the configuration information of the first CSI-RS based on the configuration information fed back by the CSI corresponding to the first CSI-RS, including:

[0118] The first terminal determines the configuration information of the first CSI-RS as: the CSI-RS configuration information associated with the configuration information of the CSI feedback, based on the configuration information of the first CSI-RS and the association between the configuration information of the CSI feedback and the configuration information of the CSI-RS.

[0119] In other words, the configuration information fed back by CSI is related to the configuration information of CSI-RS. By indicating the configuration information fed back by CSI, the corresponding configuration information of CSI-RS is indirectly indicated. Optionally, the configuration information fed back by CSI is indicated by a second terminal.

[0120] In summary, in the embodiments of this application, the first terminal feeds back the CSI corresponding to the first CSI-RS to the second terminal. The CSI carries SL channel state information and / or SL beam-related information to assist the second terminal in performing beam training between terminals, thereby establishing a transmission beam between the first terminal and the second terminal.

[0121] like Figure 3 As shown in the embodiments of this application, a method for transmitting Channel State Information (CSI) is also provided, including:

[0122] Step 301: The second terminal sends the first channel state information reference signal (CSI-RS).

[0123] Step 302, the second terminal receives the CSI corresponding to the first CSI-RS fed back by the first terminal; wherein the CSI carries at least one of the following parameters:

[0124] Side link SL channel status information;

[0125] SL beam information.

[0126] Optionally, the first terminal is the receiving terminal (RX UE) in SL communication, and the second terminal is the sending terminal (TX UE) in SL communication.

[0127] As an optional embodiment, the SL channel state information includes at least one of the following:

[0128] Channel Quality Indicator (CQI);

[0129] Rank indicator RI;

[0130] Channel matrix;

[0131] Channel parameters.

[0132] Alternatively, assuming a predefined resource set for beam sweeping is used for broadcasting, the CSI may also carry at least one of the following: measured carrier information, carrier information associated with CSI feedback, and resource pool information.

[0133] As another optional embodiment, the SL beam-related information includes at least one of the following:

[0134] Beam index;

[0135] Reference Signal Identifier (RS ID);

[0136] Resource index;

[0137] Sequence index;

[0138] Layer 1 Reference Signal Received Power (L1-RSRP).

[0139] In at least one embodiment of this application, if beam training is performed on the first terminal side, the first terminal does not need to carry SL beam-related information in the CSI.

[0140] Optionally, if beam training is performed on the first terminal side, and the first CSI-RS is only used for beam measurement, the first terminal does not need to feed back the CSI corresponding to the first CSI-RS; or, if the first CSI-RS is used for both beam measurement and channel measurement, the first terminal feeds back the CSI corresponding to the first CSI-RS, but the CSI does not carry SL beam-related information.

[0141] For example, the first indication information indicates that the first CSI-RS transmission does not require corresponding CSI reporting (i.e., RX UE-side beam training). That is, the first terminal receives the first indication information indicating that the first CSI-RS does not need to report the corresponding CSI; then, based on the indication of the first indication information, the first terminal determines not to feed back the CSI corresponding to the first CSI-RS. Optionally, the first indication information can be carried in an indication field of the CSI request information, or the first indication information can be sent separately by the second terminal; no specific limitation is made here.

[0142] In at least one alternative embodiment of this application, differential coding can be used between multiple CSIs carrying a certain parameter to reduce signaling overhead.

[0143] In at least one embodiment of this application, the transmission resources of the first CSI-RS satisfy at least one of the following:

[0144] The transmission time of the first CSI-RS is x time units after the transmission time of the CSI-RS transmission indication signaling;

[0145] The transmission resources of the first CSI-RS belong to the PSSCH reserved by the side link control information SCI associated with the CSI-RS transmission indication signaling;

[0146] Here, x takes the value of a pre-agreed, pre-configured, configured, or dynamically indicated value. The time unit mentioned above can be milliseconds (ms), symbols, or time slots.

[0147] Optionally, the first terminal may demodulate the CSI-RS transmission indication signaling to adjust the beam direction of the first terminal receiving CSI-RS; correspondingly, the value of x is greater than or equal to the time value of the first terminal demodulating the CSI-RS transmission indication signaling, and / or the time value of completing the beam adjustment.

[0148] As an optional embodiment, the method further includes:

[0149] The second terminal determines whether the transmission time of the first CSI-RS needs to be after x time units of the transmission time of the CSI-RS transmission indication signaling, based on whether the first terminal needs to adjust the receiving beam.

[0150] In other words, the TX UE can determine whether it needs to meet the time limit requirement x based on whether the RX UE needs to adjust its receive beam according to the CSI-RS transmission indication signaling. For example, if the RX UE does not need to adjust its receive beam according to the CSI-RS transmission indication signaling, then the CSI-RS transmission timing does not need to meet the time limit requirement x; conversely, if the RX UE needs to adjust its receive beam according to the CSI-RS transmission indication signaling, then the CSI-RS transmission timing needs to meet the time limit requirement x.

[0151] In at least one embodiment of this application, when the transmission resource of the first CSI-RS is a set of CSI-RS resources (i.e., the CSI-RS used for beam measurement can be configured / indicated as a set of CSI-RS resources), the mapping form of the set of CSI-RS resources includes at least one of the following:

[0152] Form 1: A group of CSI-RS resources is mapped onto a PSSCH transport or a time slot;

[0153] Form 2: A set of CSI-RS resources is mapped to different PSSCH transmissions or different time slots.

[0154] For form 1, for example, at least for beam repetition CSI-RS resource transmission, a set of CSI-RS resources can be configured on the same PSSCH transmission. For example... Figure 4 As shown, the resources of CSI-RS#1, CSI-RS#2, CSI-RS#3, and CSI-RS#4 are mapped to the same PSSCH. This can also be indirectly understood as follows: as long as a set of CSI-RS resources is transmitted on the same PSSCH, the transmission form of CSI-RS is beam repetition.

[0155] For form 2, a set of CSI-RS resources is mapped to different PSSCH transmissions or different time slots to increase the maximum number of CSI-RS resources or facilitate beam switching of CSI-RS. For example... Figure 5 As shown, the resources of CSI-RS#1, CSI-RS#2, CSI-RS#3, and CSI-RS#4 are mapped to different PSSCHs.

[0156] Optionally, the mapping method of CSI-RS resources on a PSSCH transport / slot can be configured (e.g., using the existing SL CSI-RS configuration method). The CSI-RS mapping method is the same on different PSSCH transports / different slots, which can simplify the complexity of CSI-RS resource configuration.

[0157] Optionally, the CSI-RS resource configuration information includes slot information (e.g., slot index, virtual slot identifier [identifying which CSI-RS resources belong to the same slot]) or PSSCH transmission sequence number information (e.g., CSI-RS resource corresponds to the initial transmission, CSI-RS resource corresponds to the first transmission, CSI-RS resource corresponds to the second transmission, etc.) to reflect the slots mapped by the CSI-RS resources.

[0158] As another optional embodiment, when the transmission resources of the first CSI-RS are a set of CSI-RS resources (i.e., the CSI-RS used for beam measurement can be configured / indicated as a set of CSI-RS resources), the CSI-RS resource numbers correspond to the beam information; wherein, the CSI-RS resource numbering method is at least one of the following:

[0159] Configure each CSI-RS resource to correspond to a specific number;

[0160] Number them according to the time sequence of CSI-RS resources;

[0161] The SCI dynamically indicates the CSI-RS resource number;

[0162] CSI-RS resource numbers are assigned to different PSSCHs or time slots at the granularity of PSSCH or time slot.

[0163] In other words, CSI-RS resources can be assigned numbers, and there is a correspondence between beam information and CSI-RS resource numbers. Reporting beam information is equivalent to reporting CSI-RS resource numbers. The numbering method includes at least one of the following:

[0164] Configure each CSI-RS resource to correspond to a specific ID (i.e., number).

[0165] CSI-RS resource numbers are numbered sequentially by time to reduce the complexity of configuration information.

[0166] When a set of CSI-RS resources is mapped to different PSSCH transmissions / different slots, the CSI-RS resource number information is dynamically indicated by the control information. For example, the SCI indicates the resource number corresponding to the CSI-RS transmitted in the associated PSSCH, so as to achieve flexible number indication. Especially when CSI-RS resources are mapped to different PSSCH transmissions, the RX UE can identify the corresponding CSI-RS resource number when it receives any PSSCH transmission.

[0167] When a set of CSI-RS resources is mapped to different PSSCH transmissions / different slots, the basic unit for CSI-RS resource numbering is per PSSCH / slot. CSI-RS resources on different PSSCHs / slots are renumbered. RX UE can identify the corresponding CSI-RS resource number upon receiving any PSSCH transmission.

[0168] In summary, in the embodiments of this application, the first terminal feeds back the CSI corresponding to the first CSI-RS to the second terminal. The CSI carries SL channel state information and / or SL beam-related information to assist the second terminal in performing beam training between terminals, thereby establishing a transmission beam between the first terminal and the second terminal.

[0169] The CSI transmission method provided in this application can be executed by a CSI transmission device. This application uses an example of a CSI transmission device executing the CSI transmission method to illustrate the CSI transmission device provided in this application.

[0170] like Figure 6 As shown in the illustration, this application also provides a channel state information (CSI) transmission apparatus 600, comprising:

[0171] The first receiving module 601 is used to receive the first channel state information reference signal CSI-RS;

[0172] The first transmitting module 602 is used to feed back the CSI corresponding to the first CSI-RS to the second terminal; wherein the CSI carries at least one of the following parameters:

[0173] Side link SL channel status information;

[0174] SL beam information.

[0175] As an optional embodiment, the apparatus further includes:

[0176] The first determining module is configured to determine the parameters carried by the CSI based on the first information; wherein the first information includes any one of the following:

[0177] CSI request information;

[0178] CSI reporting time;

[0179] Configuration information of the first CSI-RS;

[0180] Predefined information used to indicate the parameters carried by CSI.

[0181] As an optional embodiment, the first determining module includes:

[0182] The first submodule is used to determine the parameter carried by the CSI request information as the parameter indicated by the parameter indication information based on the parameter indication information carried by the CSI request information.

[0183] or,

[0184] The second submodule is used to determine the parameters carried by the CSI based on the CSI configuration indication information carried by the CSI request information: the parameters corresponding to the CSI configuration indicated by the CSI configuration indication information;

[0185] or,

[0186] The third submodule is used to determine the parameters carried by the CSI request information as corresponding to the signaling format, based on the signaling format of the CSI request information.

[0187] As an optional embodiment, the CSI configuration indication information is used to indicate the ID of the CSI configuration;

[0188] or,

[0189] The CSI configuration indication information is used to indicate the item index of the CSI configuration in the first preset list.

[0190] As an optional embodiment, the first determining module includes:

[0191] The fourth submodule is used to determine the first time range to which the CSI reporting time belongs;

[0192] The fifth submodule is used to determine, based on the first time range, the parameters carried by the CSI as: pre-agreed parameters corresponding to the first time range.

[0193] As an optional embodiment, the first determining module includes:

[0194] The sixth submodule is used to determine, based on the configuration information of the first CSI-RS, the parameters carried by the CSI as: parameters associated with the configuration information of the first CSI-RS;

[0195] The configuration information of the first CSI-RS is indicated by the second terminal.

[0196] As an optional embodiment, the apparatus further includes:

[0197] The second determining module is configured to determine the configuration information of the first CSI-RS based on the second information; wherein the second information includes at least one of the following:

[0198] The transmission indication signaling of the first CSI-RS;

[0199] The transmission time of the first CSI-RS;

[0200] The configuration information fed back by the Channel State Information (CSI) corresponding to the first CSI-RS.

[0201] As an optional embodiment, when the first CSI-RS is used for beam measurement, the configuration information of the first CSI-RS is used to configure or indicate any of the following:

[0202] The transmission resources of the first CSI-RS are a set of CSI-RS resources;

[0203] The first CSI-RS is transmitted within the Physical Side Link Shared Channel (PSSCH).

[0204] As an optional embodiment, the second determining module includes:

[0205] The seventh submodule is used to determine the configuration information of the first CSI-RS as the configuration information corresponding to the CSI-RS configuration identifier based on the CSI-RS configuration identifier indicated by the transmission indication signaling of the first CSI-RS;

[0206] or,

[0207] The eighth submodule is used to determine the configuration information of the first CSI-RS as the configuration information corresponding to the item index in the second preset list indicated by the transmission indication signaling of the first CSI-RS.

[0208] As an optional embodiment, the second determining module includes:

[0209] The ninth submodule is used to determine the second time range to which the transmission time of the first CSI-RS belongs;

[0210] The tenth submodule is used to determine the configuration information of the first CSI-RS according to the second time range as: pre-agreed CSI-RS configuration information corresponding to the second time range.

[0211] As an optional embodiment, the second determining module includes:

[0212] The eleventh submodule is used to determine the configuration information of the first CSI-RS as: the CSI-RS configuration information associated with the configuration information of the CSI feedback, based on the configuration information of the CSI feedback corresponding to the first CSI-RS and the association relationship between the configuration information of the CSI feedback and the configuration information of the CSI-RS.

[0213] In this embodiment, the first terminal feeds back the CSI corresponding to the first CSI-RS to the second terminal. The CSI carries SL channel state information and / or SL beam-related information to assist the second terminal in performing beam training between terminals, thereby establishing a transmission beam between the first terminal and the second terminal.

[0214] It should be noted that the channel state information (CSI) transmission device provided in this application embodiment is a device capable of executing the above-described channel state information (CSI) transmission method. Therefore, all embodiments of the above-described channel state information (CSI) transmission method are applicable to this device and can achieve the same or similar beneficial effects.

[0215] like Figure 7 As shown in the illustration, this application also provides a channel state information (CSI) transmission apparatus 700, comprising:

[0216] The second transmitting module 701 is used to transmit the first channel state information reference signal CSI-RS;

[0217] The second receiving module 702 is configured to receive the CSI corresponding to the first CSI-RS fed back by the first terminal; wherein the CSI carries at least one of the following parameters:

[0218] Side link SL channel status information;

[0219] SL beam information.

[0220] As an optional embodiment, the transmission resources of the first CSI-RS satisfy at least one of the following:

[0221] The transmission time of the first CSI-RS is x time units after the transmission time of the CSI-RS transmission indication signaling;

[0222] The transmission resources of the first CSI-RS belong to the PSSCH reserved by the side link control information SCI associated with the CSI-RS transmission indication signaling;

[0223] Where x takes the value of a pre-agreed, pre-configured, configured, or dynamically indicated value.

[0224] As an optional embodiment, the apparatus further includes:

[0225] The third determining module is used to determine whether the transmission time of the first CSI-RS needs to be after x time units of the transmission time of the CSI-RS transmission indication signaling, based on whether the first terminal needs to adjust the receiving beam.

[0226] As an optional embodiment, when the transmission resources of the first CSI-RS are a set of CSI-RS resources, the mapping form of the set of CSI-RS resources includes at least one of the following:

[0227] A set of CSI-RS resources is mapped to a PSSCH transport or a time slot;

[0228] A set of CSI-RS resources is mapped to different PSSCH transmissions or different time slots.

[0229] As an optional embodiment, when the transmission resources of the first CSI-RS are a group of CSI-RS resources, the CSI-RS resource numbers correspond to the beam information; wherein, the CSI-RS resource numbering method is at least one of the following:

[0230] Configure each CSI-RS resource to correspond to a specific number;

[0231] Number them according to the time sequence of CSI-RS resources;

[0232] The SCI dynamically indicates the CSI-RS resource number;

[0233] CSI-RS resource numbers are assigned to different PSSCHs or time slots at the granularity of PSSCH or time slot.

[0234] In this embodiment, the first terminal feeds back the CSI corresponding to the first CSI-RS to the second terminal. The CSI carries SL channel state information and / or SL beam-related information to assist the second terminal in performing beam training between terminals, thereby establishing a transmission beam between the first terminal and the second terminal.

[0235] It should be noted that the channel state information (CSI) transmission device provided in this application embodiment is a device capable of executing the above-described channel state information (CSI) transmission method. Therefore, all embodiments of the above-described channel state information (CSI) transmission method are applicable to this device and can achieve the same or similar beneficial effects.

[0236] The CSI transmission device in this embodiment can be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal or other devices besides a terminal. For example, the terminal can include, but is not limited to, the type of terminal 11 listed above; other devices can be servers, network attached storage (NAS), etc., and this embodiment does not impose specific limitations.

[0237] The CSI transmission device provided in this application embodiment can achieve Figures 1 to 5 The various processes implemented in the method embodiments achieve the same technical effect, and will not be described again here to avoid repetition.

[0238] Optional, such as Figure 8 As shown, this application embodiment also provides a terminal 800, including a processor 801 and a memory 802. The memory 802 stores a program or instructions that can run on the processor 801. For example, when the terminal 800 is a first terminal, when the program or instructions are executed by the processor 801, they implement the various steps of the above-described CSI transmission method embodiment and achieve the same technical effect. When the terminal 800 is a second terminal, when the program or instructions are executed by the processor 801, they implement the various steps of the above-described CSI transmission method embodiment and achieve the same technical effect. To avoid repetition, this will not be described again here.

[0239] This application embodiment also provides a terminal, including a processor and a communication interface, wherein the communication interface is used to receive a first channel state information reference signal (CSI-RS); and to feed back the CSI corresponding to the first CSI-RS to a second terminal; wherein the CSI carries at least one of the following parameters: sidelink SL channel state information; SL beam-related information; or, the communication interface is used to transmit the first channel state information reference signal (CSI-RS); and to receive the CSI corresponding to the first CSI-RS fed back by the first terminal; wherein the CSI carries at least one of the following parameters: sidelink SL channel state information; SL beam-related information. This terminal embodiment corresponds to the above-described terminal-side method embodiment, and all implementation processes and methods of the above-described method embodiments can be applied to this terminal embodiment and can achieve the same technical effect. Specifically, Figure 9 A schematic diagram of the hardware structure of a terminal to implement an embodiment of this application.

[0240] The terminal 900 includes, but is not limited to, at least some of the following components: radio frequency unit 901, network module 902, audio output unit 903, input unit 904, sensor 905, display unit 906, user input unit 907, interface unit 908, memory 909, and processor 910.

[0241] Those skilled in the art will understand that the terminal 900 may also include a power supply (such as a battery) for supplying power to various components. The power supply may be logically connected to the processor 910 through a power management system, thereby enabling functions such as managing charging, discharging, and power consumption through the power management system. Figure 9 The terminal structure shown does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0242] It should be understood that, in this embodiment, the input unit 904 may include a graphics processing unit (GPU) 9041 and a microphone 9042. The GPU 9041 processes image data of still images or videos obtained by an image capture device (such as a camera) in video capture mode or image capture mode. The display unit 906 may include a display panel 9061, which may be configured in the form of a liquid crystal display, an organic light-emitting diode, or the like. The user input unit 907 includes at least one of a touch panel 9071 and other input devices 9072. The touch panel 9071 is also called a touch screen. The touch panel 9071 may include a touch detection device and a touch controller. Other input devices 9072 may include, but are not limited to, physical keyboards, function keys (such as volume control buttons, power buttons, etc.), trackballs, mice, and joysticks, which will not be described in detail here.

[0243] In this embodiment, after receiving downlink data from the network-side device, the radio frequency unit 901 can transmit it to the processor 910 for processing; in addition, the radio frequency unit 901 can send uplink data to the network-side device. Typically, the radio frequency unit 901 includes, but is not limited to, antennas, amplifiers, transceivers, couplers, low-noise amplifiers, duplexers, etc.

[0244] The memory 909 can be used to store software programs or instructions, as well as various data. The memory 909 may primarily include a first storage area for storing programs or instructions and a second storage area for storing data. The first storage area may store the operating system, application programs or instructions required for at least one function (such as sound playback, image playback, etc.). Furthermore, the memory 909 may include volatile memory or non-volatile memory, or both. The non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory can be random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct memory bus RAM (DRRAM). The memory 909 in the embodiments of this application includes, but is not limited to, these and any other suitable types of memory.

[0245] Processor 910 may include one or more processing units; optionally, processor 910 integrates an application processor and a modem processor, wherein the application processor mainly handles operations involving the operating system, user interface, and applications, and the modem processor mainly handles wireless communication signals, such as a baseband processor. It is understood that the aforementioned modem processor may also not be integrated into processor 910.

[0246] The radio frequency unit 901 is used to receive the first channel state information reference signal CSI-RS and to feed back the CSI corresponding to the first CSI-RS to the second terminal; wherein the CSI carries at least one of the following parameters: side link SL channel state information; SL beam-related information.

[0247] Alternatively, frequency unit 901 is also used to transmit a first channel state information reference signal CSI-RS; receive the CSI corresponding to the first CSI-RS fed back by the first terminal; wherein the CSI carries at least one of the following parameters: side link SL channel state information; SL beam-related information.

[0248] In this embodiment, the first terminal feeds back the CSI corresponding to the first CSI-RS to the second terminal. The CSI carries SL channel state information and / or SL beam-related information to assist the second terminal in performing beam training between terminals, thereby establishing a transmission beam between the first terminal and the second terminal.

[0249] It should be noted that the channel state information (CSI) transmission device provided in this application embodiment is a device capable of executing the above-described channel state information (CSI) transmission method. Therefore, all embodiments of the above-described channel state information (CSI) transmission method are applicable to this device and can achieve the same or similar beneficial effects.

[0250] This application also provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they implement the various processes of the above-described method embodiment for transmitting Channel State Information (CSI) and achieve the same technical effect. To avoid repetition, they will not be described again here.

[0251] The processor is the processor in the terminal described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0252] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the above-described channel state information (CSI) transmission method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0253] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0254] This application also provides a computer program / program product, which is stored in a storage medium and executed by at least one processor to implement the various processes of the above-described channel state information (CSI) transmission embodiment, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0255] This application also provides a communication system, including a first terminal and a second terminal. The first terminal can be used to execute the steps of the channel state information (CSI) transmission method as described above, and the second terminal can be used to execute the steps of the channel state information (CSI) transmission method as described above.

[0256] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0257] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0258] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A method for transmitting Channel State Information (CSI), characterized in that, include: The first terminal receives the first channel state information reference signal CSI-RS; The first terminal feeds back the CSI corresponding to the first CSI-RS to the second terminal; wherein the CSI carries at least one of the following parameters: Side link SL channel status information; SL beam information; The method further includes: The first terminal determines the parameters carried by the CSI based on the first information; wherein the first information includes any one of the following: CSI request information; CSI reporting time; Configuration information of the first CSI-RS; Predefined information used to indicate the parameters carried by CSI; The first terminal determines the parameters carried by the CSI based on the CSI reporting time, including: The first terminal determines the first time range to which the CSI reporting time belongs; The first terminal determines the parameters carried by the CSI according to the first time range as: pre-agreed parameters corresponding to the first time range; Alternatively, the first terminal determines the parameters carried by the CSI based on the configuration information of the first CSI-RS, including: The first terminal determines, based on the configuration information of the first CSI-RS, that the parameter carried by the CSI is: the parameter associated with the configuration information of the first CSI-RS; The configuration information of the first CSI-RS is indicated by the second terminal.

2. The method according to claim 1, characterized in that, The first terminal determines the parameters carried by the CSI based on the CSI request information, including: The first terminal determines the parameter carried by the CSI request information as the parameter indicated by the parameter indication information based on the parameter indication information carried by the CSI request information. or, The first terminal determines the parameter carried by the CSI according to the CSI configuration indication information carried in the CSI request information: the parameter corresponding to the CSI configuration indicated by the CSI configuration indication information; or, The first terminal determines the parameters carried by the CSI request information according to the signaling format of the CSI request information as parameters corresponding to the signaling format.

3. The method according to claim 2, characterized in that, The CSI configuration indication information is used to indicate the ID of the CSI configuration; or, The CSI configuration indication information is used to indicate the item index of the CSI configuration in the first preset list.

4. The method according to claim 1, characterized in that, The method further includes: The first terminal determines the configuration information of the first CSI-RS based on the second information; wherein the second information includes at least one of the following: The transmission indication signaling of the first CSI-RS; The transmission time of the first CSI-RS; The configuration information fed back by the Channel State Information (CSI) corresponding to the first CSI-RS.

5. The method according to claim 4, characterized in that, When the first CSI-RS is used for beam measurement, the configuration information of the first CSI-RS is used to configure or indicate any of the following: The transmission resources of the first CSI-RS are a set of CSI-RS resources; The first CSI-RS is transmitted within the Physical Side Link Shared Channel (PSSCH).

6. The method according to claim 4, characterized in that, The first terminal determines the configuration information of the first CSI-RS based on the transmission indication signaling of the first CSI-RS, including: The first terminal determines the configuration information of the first CSI-RS as the configuration information corresponding to the CSI-RS configuration identifier based on the CSI-RS configuration identifier indicated by the transmission indication signaling of the first CSI-RS; or, The first terminal determines the configuration information of the first CSI-RS to be the configuration information corresponding to the item index in the second preset list indicated by the transmission indication signaling of the first CSI-RS.

7. The method according to claim 4, characterized in that, The first terminal determines the configuration information of the first CSI-RS based on the transmission time of the first CSI-RS, including: The first terminal determines the second time range to which the transmission time of the first CSI-RS belongs; The first terminal determines the configuration information of the first CSI-RS according to the second time range as: the pre-agreed CSI-RS configuration information corresponding to the second time range.

8. The method according to claim 4, characterized in that, The first terminal determines the configuration information of the first CSI-RS based on the configuration information fed back by the CSI corresponding to the first CSI-RS, including: The first terminal determines the configuration information of the first CSI-RS as: the CSI-RS configuration information associated with the configuration information of the CSI feedback, based on the configuration information of the first CSI-RS corresponding to the first CSI-RS and the association relationship between the configuration information of the CSI feedback and the configuration information of the CSI-RS.

9. A method for transmitting Channel State Information (CSI), characterized in that, include: The second terminal sends the first channel state information reference signal (CSI-RS); The second terminal receives the CSI corresponding to the first CSI-RS fed back by the first terminal; wherein the CSI carries at least one of the following parameters: Side link SL channel status information; SL beam information; The method further includes: The second terminal determines whether the transmission time of the first CSI-RS needs to be after x time units of the transmission time of the CSI-RS transmission indication signaling, based on whether the first terminal needs to adjust the receiving beam; wherein the value of x is a pre-agreed, pre-configured, configured, or dynamically indicated value.

10. The method according to claim 9, characterized in that, The transmission resources of the first CSI-RS satisfy at least one of the following: The transmission time of the first CSI-RS is x time units after the transmission time of the CSI-RS transmission indication signaling; The transmission resources of the first CSI-RS belong to the PSSCH reserved by the side link control information SCI associated with the CSI-RS transmission indication signaling; Where x takes the value of a pre-agreed, pre-configured, configured, or dynamically indicated value.

11. The method according to claim 9, characterized in that, When the transmission resources of the first CSI-RS are a set of CSI-RS resources, the mapping form of the set of CSI-RS resources includes at least one of the following: A set of CSI-RS resources is mapped to a PSSCH transport or a time slot; A set of CSI-RS resources is mapped to different PSSCH transmissions or different time slots.

12. The method according to claim 9, characterized in that, When the transmission resources of the first CSI-RS consist of a group of CSI-RS resources, the CSI-RS resource numbers correspond to the beam information; wherein, the CSI-RS resource numbering method includes at least one of the following: Configure each CSI-RS resource to correspond to a specific number; Number them according to the time sequence of CSI-RS resources; The SCI dynamically indicates the CSI-RS resource number; CSI-RS resource numbers are assigned to different PSSCHs or time slots at the granularity of PSSCH or time slot.

13. A transmission apparatus for Channel State Information (CSI), characterized in that, include: The first receiving module is used to receive the first channel state information reference signal CSI-RS; The first transmitting module is used to feed back the CSI corresponding to the first CSI-RS to the second terminal; wherein the CSI carries at least one of the following parameters: Side link SL channel status information; SL beam information; The device further includes: The first determining module is configured to determine the parameters carried by the CSI based on the first information; wherein the first information includes any one of the following: CSI request information; CSI reporting time; Configuration information of the first CSI-RS; Predefined information used to indicate the parameters carried by CSI; The first determining module includes: The fourth submodule is used to determine the first time range to which the CSI reporting time belongs; The fifth submodule is used to determine, based on the first time range, the parameters carried by the CSI as: pre-agreed parameters corresponding to the first time range; Alternatively, the first determining module may include: The sixth submodule is used to determine, based on the configuration information of the first CSI-RS, the parameters carried by the CSI as: parameters associated with the configuration information of the first CSI-RS; The configuration information of the first CSI-RS is indicated by the second terminal.

14. The apparatus according to claim 13, characterized in that, The first determining module includes: The first submodule is used to determine the parameter carried by the CSI request information as the parameter indicated by the parameter indication information based on the parameter indication information carried by the CSI request information. or, The second submodule is used to determine the parameters carried by the CSI based on the CSI configuration indication information carried by the CSI request information: the parameters corresponding to the CSI configuration indicated by the CSI configuration indication information; or, The third submodule is used to determine the parameters carried by the CSI request information as corresponding to the signaling format, based on the signaling format of the CSI request information.

15. The apparatus according to claim 14, characterized in that, The CSI configuration indication information is used to indicate the ID of the CSI configuration; or, The CSI configuration indication information is used to indicate the item index of the CSI configuration in the first preset list.

16. The apparatus according to claim 13, characterized in that, The device further includes: The second determining module is configured to determine the configuration information of the first CSI-RS based on the second information; wherein the second information includes at least one of the following: The transmission indication signaling of the first CSI-RS; The transmission time of the first CSI-RS; The configuration information fed back by the Channel State Information (CSI) corresponding to the first CSI-RS.

17. The apparatus according to claim 16, characterized in that, When the first CSI-RS is used for beam measurement, the configuration information of the first CSI-RS is used to configure or indicate any of the following: The transmission resources of the first CSI-RS are a set of CSI-RS resources; The first CSI-RS is transmitted within the Physical Side Link Shared Channel (PSSCH).

18. The apparatus according to claim 16, characterized in that, The second determining module includes: The seventh submodule is used to determine the configuration information of the first CSI-RS as the configuration information corresponding to the CSI-RS configuration identifier based on the CSI-RS configuration identifier indicated by the transmission indication signaling of the first CSI-RS; or, The eighth submodule is used to determine the configuration information of the first CSI-RS as the configuration information corresponding to the item index in the second preset list indicated by the transmission indication signaling of the first CSI-RS.

19. The apparatus according to claim 16, characterized in that, The second determining module includes: The ninth submodule is used to determine the second time range to which the transmission time of the first CSI-RS belongs; The tenth submodule is used to determine the configuration information of the first CSI-RS according to the second time range as: pre-agreed CSI-RS configuration information corresponding to the second time range.

20. The apparatus according to claim 16, characterized in that, The second determining module includes: The eleventh submodule is used to determine the configuration information of the first CSI-RS as: the CSI-RS configuration information associated with the configuration information of the CSI feedback, based on the configuration information of the CSI feedback corresponding to the first CSI-RS and the association relationship between the configuration information of the CSI feedback and the configuration information of the CSI-RS.

21. A transmission apparatus for Channel State Information (CSI), characterized in that, include: The second transmitting module is used to transmit the first channel state information reference signal CSI-RS; The second receiving module is configured to receive the CSI corresponding to the first CSI-RS fed back by the first terminal; wherein the CSI carries at least one of the following parameters: Side link SL channel status information; SL beam information; The device further includes: The third determining module is used to determine whether the transmission time of the first CSI-RS needs to be after x time units of the transmission time of the CSI-RS transmission indication signaling, based on whether the first terminal needs to adjust the receiving beam; wherein the value of x is a pre-agreed, pre-configured, configured, or dynamically indicated value.

22. The apparatus according to claim 21, characterized in that, The transmission resources of the first CSI-RS satisfy at least one of the following: The transmission time of the first CSI-RS is x time units after the transmission time of the CSI-RS transmission indication signaling; The transmission resources of the first CSI-RS belong to the PSSCH reserved by the side link control information SCI associated with the CSI-RS transmission indication signaling; Where x takes the value of a pre-agreed, pre-configured, configured, or dynamically indicated value.

23. The apparatus according to claim 21, characterized in that, When the transmission resources of the first CSI-RS are a set of CSI-RS resources, the mapping form of the set of CSI-RS resources includes at least one of the following: A set of CSI-RS resources is mapped to a PSSCH transport or a time slot; A set of CSI-RS resources is mapped to different PSSCH transmissions or different time slots.

24. The apparatus according to claim 21, characterized in that, When the transmission resources of the first CSI-RS consist of a group of CSI-RS resources, the CSI-RS resource numbers correspond to the beam information; wherein, the CSI-RS resource numbering method includes at least one of the following: Configure each CSI-RS resource to correspond to a specific number; Number them according to the time sequence of CSI-RS resources; The SCI dynamically indicates the CSI-RS resource number; CSI-RS resource numbers are assigned to different PSSCHs or time slots at the granularity of PSSCH or time slot.

25. A terminal, characterized in that, It includes a processor and a memory, the memory storing a program or instructions that can run on the processor, the program or instructions being executed by the processor to implement the steps of the method for transmitting channel state information (CSI) as described in any one of claims 1 to 8, or to implement the steps of the method for transmitting channel state information (CSI) as described in any one of claims 9 to 12.

26. A readable storage medium, characterized in that, The readable storage medium stores a program or instructions that, when executed by a processor, implement the method for transmitting Channel State Information (CSI) as described in any one of claims 1 to 8, or implement the steps of the method for transmitting Channel State Information (CSI) as described in any one of claims 9 to 12.

Images