Method for sending SL SCI report and user equipment

Abstract

The invention provides a method executed by user equipment for sending an SL SCI report, and the method comprises the steps: determining whether there is an effective SL transmission resource when there is a triggered SL CSI report; when there is an effective SL transmission resource, determining whether a carrier to which the SL transmission resource belongs is the same as a carrier associated with the SL CSI report; and when the SL transmission resource is the same as the carrier associated with the SL CSI report, indicating to generate an SL CSI report MAC CE in a multiplexing and combining process, and sending an MAC PDU including the SL CSI report MAC CE to a sending user equipment sending the SCI on the SL transmission resource.

Description

Technical Field

[0001] The present disclosure relates to the field of wireless communication technology, and in particular to a method for sending an SL SCI report performed by a user equipment and a corresponding user equipment. Background Art

[0002] Vehicle to Everything (V2X) is a new generation of information and communication technology that connects vehicles to everything, where V stands for vehicle and X stands for any object that interacts with the vehicle. Currently, X mainly includes vehicles, people, roadside infrastructure and networks.

[0003] In a pair of UEs performing V2X service communications, the UEs communicate via a side link (Sidelink SL). A UE performing SL communication is also referred to as a SL UE. The UEs at both ends of the SL link can be classified into a transmitting UE (TX UE) and a receiving UE (RX UE) according to the categories of sending and receiving. From the perspective of one UE, the other UE is the peer UE.

[0004] In order to improve the throughput of Sidelink communication transmission, the TX UE can work in a carrier aggregation (CA) mode, that is, the TX UE can work on multiple carriers at the same time to send data.

[0005] Sidelink communication uses a link detection method based on CSI measurement. The TX UE can transmit an SLCSI reference signal to the RX UE and trigger the RX UE to generate an SL CSI report. The RX UE includes the generated SL CSI report in the SL CSI MAC CE and sends it to the TX UE.

[0006] In the multi-carrier aggregation working mode, the UE works on multiple carriers, and each carrier can perform SL CSI measurement and reporting. Then there is such a problem: when the RX UE generates an SLCSI MAC CE based on the SL CSI measurement on one carrier and sends it to the TX UE, if the TX UE cannot identify the carrier corresponding to the received SL CSI MAC CE, then the TX UE may misunderstand the SL CSI report of carrier A as the SL CSI report of carrier B. In order to avoid such a situation, a corresponding solution is needed. Summary of the invention

[0007] The present disclosure proposes a method for sending a SL SCI report performed by a user equipment and a corresponding user equipment to solve at least some of the above problems.

[0008] According to one aspect of the present disclosure, a method for sending a SL SCI report performed by a user equipment is provided, including: when there is a triggered SL CSI report, determining whether there are valid SL transmission resources; when there are valid SL transmission resources, determining whether the carrier to which the SL transmission resources belong is the same as the carrier associated with the SL CSI report; and when the SL transmission resources are the same as the carrier associated with the SL CSI report, indicating the generation of a SL CSI report MAC CE during the multiplexing and combining process, and sending a MAC PDU containing the SL CSI report MAC CE to the sending user equipment sending the SCI on the SL transmission resources.

[0009] According to another aspect of the present disclosure, there is provided another method for sending an SL SCI report performed by a user equipment, comprising: when there is a triggered SL CSI report, determining whether there is a valid SL transmission resource; when there is a valid SL transmission resource, sending the SL CSI report on the SL transmission resource to a sending user equipment that sends the SCI that triggers the SL CSI report, the SL CSI report including a given carrier identifier associated with the SL CSI report. The carrier identifier is determined by at least one of the following: taking the carrier identifier of the carrier receiving the SCI as the given carrier identifier; taking the carrier identifier of the carrier corresponding to the SL CSI measurement of the SL CSI report as the given carrier identifier; taking the carrier identifier of the carrier associated with the SL CSI report indicated by the SCI as the given carrier identifier.

[0010] According to another aspect of the present disclosure, a user equipment is provided, comprising: a processor; and a memory, wherein the memory stores instructions; wherein when the instructions are executed by the processor, the user equipment executes the method provided by the present disclosure.

[0011] According to the present disclosure, the sending UE that sends SCI can accurately identify the carrier corresponding to the SL CSI report received from the receiving UE. In addition, according to the present disclosure, the sending UE that sends SCI can accurately identify the carrier corresponding to the SL CSI report received from the receiving UE without expanding the space of the existing SL CSI report MAC CE. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The above and other features of the present disclosure will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0013] Figure 1is a flowchart of a method for sending an SL SCI report performed by a user equipment according to an embodiment of the disclosure.

[0014] Figure 2 FIG. 1 is a flowchart of an example of determining an associated carrier in one embodiment of the present disclosure.

[0015] Figure 3 is a flowchart of a method for sending an SL SCI report performed by a user equipment according to another disclosed embodiment.

[0016] Figure 4 is a block diagram showing a user equipment according to an embodiment of the present disclosure.

[0017] It should be noted that the drawings are not necessarily drawn to scale, emphasis instead being placed on illustrating the principles of the technology disclosed herein. In addition, for clarity, like reference numerals throughout the drawings refer to like elements. DETAILED DESCRIPTION

[0018] The present disclosure is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the present disclosure should not be limited to the specific embodiments described below. In addition, for the sake of simplicity, detailed descriptions of known technologies that are not directly related to the present disclosure are omitted to prevent confusion in the understanding of the present disclosure.

[0019] Before the detailed description, some terms mentioned in the present disclosure are explained as follows. Unless otherwise specified, the terms involved in the present disclosure have the following meanings.

[0020] UE User Equipment

[0021] RLF Radio Link Failure

[0022] NR New Radio Next Generation Wireless Technology

[0023] LTE Long Term Evolution

[0024] Elte Enhaced Long Term Evolution

[0025] RRC Radio Resource Control

[0026] PDCP Packet Data Convergence Protocol Packet Data Convergence Protocol (layer)

[0027] RLC Radio Link Control, radio link control (layer)

[0028] MAC Medium Access Control Media Access Control (layer)

[0029] PHY physical layer

[0030] MAC CE Medium Access Control Control Element Media Access Control Layer Control Element

[0031] PDU Protocol Data Unit Protocol Data Unit

[0032] UE User Equipment

[0033] NR New Radio Next Generation Wireless Technology

[0034] Sidelink

[0035] V2X Vechile to Everything

[0036] PSSCH Physical Sidelink Shared Channel Physical Sidelink Shared Channel

[0037] PSFCH Physical Sidelink Feedback Channel Physical Sidelink Feedback Channel

[0038] PSCCH Physical Sidelink Control Channel Physical Sidelink Control Channel

[0039] HARQ Hybrid Automatic Repeat Request Hybrid Automatic Repeat Request

[0040] CSI report Channel Status Information report Channel Status Information report

[0041] CSI RS Channel Status Information Reference Signaling Channel Status Information Reference Signaling

[0042] SCI Sidelink Control Information Sidelink Control Information

[0043] SL-SCH Sidelink Shared Channel Sidelink Shared Channel

[0044] SCI Sidelink Control Information

[0045] SCI is usually used to indicate the transmission of SL-SCH and whether HARQ feedback is enabled.

[0046] An SCI includes the first stage SCI and the second stage SCI. The first stage SCI is transmitted on the PSCCH channel, and the second stage SCI is transmitted on the PSSCH channel. The transport blocks indicated in the SCI are also transmitted on the PSSCH channel.

[0047] The MAC entity monitors the PSCCH channel (monitorPSCCH) at the occurrence time of the PSCCH channel (PSCCH durations).

[0048] If the first level SCI is received on the PSCCH channel, the UE can determine the reception timing of the second level SCI and the reception timing of the transport block (TB) according to the content of the first level SCI. When the second level SCI is received, the UE can obtain or store the valid SCI.

[0049] The SCI may carry a domain value for requesting an SL CSI report. For example, setting the value of the CSI request domain to '1' indicates that the RX UE is requested to report an SL CSI report. After receiving the SCI, the RX UE may trigger an SE CSI report. When there are valid SL transmission resources, the MAC entity of the RX UE may instruct the generation of an SL CSI report MAC CE and send it to the TX UE in the valid SL transmission resources, while canceling the triggered SL CSI report. The valid SL transmission resources here generally refer to the SL resources allocated to the first transmission or a new transmission.

[0050] In order to generate the SL CSI report, the RX UE needs to measure the reference signal SL CSI RS. According to the following pre-configured parameters, the transmission of the SL CSI RS can be determined to perform the measurement.

[0051] -sl-CSI-RS-FirstSymbol indicates the first OFDM symbol on a PRB used for SL CSI-RS;

[0052] -sl-CSI-RS-FreqAllocation indicates the number of antenna ports and the frequency domain allocated to the SL CSI-RS

[0053] SL Grant

[0054] The SL grant can be automatically selected and generated / created by the UE's MAC entity. The SL grant is used to determine the transmission timing of the PSCCH and the transmission timing of the PSSCH, where the PSCCH is used to transmit the SCI and the PSSCH is used to transmit the SL-SCH information. When the MAC determines to create an SL grant, the MAC first selects the resources, that is, on which resources to determine the SL grant. Then, the transmission opportunities are further determined on the selected resources, and the opportunities are considered as the SL grant, thereby completing the creation of the SL grant.

[0055] The TX UE and the RX UE are connected via the PC5 (ProSe protocol 5) interface. The PC5 interface is an interface for control plane and user plane sidelink communication between UE and UE. For sidelink unicast, the PC5-RRC connection is an access layer (AS layer) logical connection between a pair of source layer 2 IDs and target layer 2 IDs. The establishment of a PC5 unicast link will correspond to the establishment of a PC5-RRC connection. The PC5-RRC message refers to the message transmitted on the PC5-RRC connection, which is mainly generated and processed by the PC5 RRC layer of the UE. The PC5 RRC reconfiguration message is the PC5 RRC message. The PC5-S connection is a non-access layer (NAS) layer logical connection between a pair of source layer 2 IDs and target layer 2 IDs, or it can be considered as a logical connection of the sidelink communication high layer. The PC5-S message (also called PC5-S signaling, PC5-S signaling) refers to the message or signaling transmitted on the PC5 non-access layer, which is mainly generated or processed by the non-access layer of the PC5 interface.

[0056] In this article, a PC5 unicast link or a PC5-S connection may be referred to as a PC5 connection. Such a connection corresponds to a pair of source layer 2 ID and target layer 2 ID. This pair of source layer 2 ID and target layer 2 ID may be referred to as the destination information corresponding to the connection.

[0057] In this article, the terms associated, corresponding, and relevant can be used interchangeably.

[0058] In this article, the terms sidelink and V2X sidelink can be used interchangeably.

[0059] In this article, sidelink and PC5 are used interchangeably.

[0060] The prefix "SL-" in this article mainly emphasizes that the discussion scenario in this article is mainly side links. If similar problems exist on other links, the methods mentioned in this article can also be used to solve them.

[0061] The UEs at both ends of the SL link can be divided into transmitting UE (TX UE) and receiving UE (RXUE) according to the classification of sending and receiving. From the perspective of one UE, the other UE is the peer UE. The UE in this article mainly refers to the RXUE, and the other peer UE is the TX UE. The TX UE sends SCI and measurement reference signals, etc., and the RX UE receives the SCI from the TX UE and detects the measurement reference signals.

[0062] Unless otherwise specified, UE in the following text generally refers to RX UE.

[0063] Carrier Aggregation (CA)

[0064] In the carrier aggregation (CA) mode, the TX UE can work on multiple carriers at the same time to send data. Each carrier has its corresponding HARQ entity, which can perform HARQ-based SL RLF detection separately.

[0065] Different carriers can operate at different frequencies or at the same frequency, which is not distinguished in this article.

[0066] In one case, the carrier can be reflected in the form of a resource pool, that is, different resource pools represent different carriers, and the UE can work on multiple resource pools at the same time to send data, which is equivalent to the UE working on multiple carriers. Therefore, "resource pool" and "carrier" can be replaced with each other in this article.

[0067] The TX UE may provide the RX UE with carrier configuration information and use a carrier identity to identify each carrier.

[0068] The carrier identification information can be directly indicated to the UE, or can be obtained based on the frequency used for receiving or sending, or the frequency at which the reference signal is measured, especially when different carriers correspond to different frequency ranges.

[0069] The method for sending SL SCI report provided by the present disclosure is described below with reference to the accompanying drawings. The order of each step shown in each figure is only an example and can be changed as needed in actual application. The method described below is executed by RX UE.

[0070] Figure 1 is a flowchart of a method for sending an SL SCI report performed by a user equipment according to an embodiment of the disclosure.

[0071] like Figure 1 As shown, at S101, the RX UE determines whether there is a triggered SL CSI report.

[0072] When there is a triggered SL CSI report, at S103 , the RX UE determines whether there are valid SL transmission resources.

[0073] When there are valid SL transmission resources, at S105 , the RX UE determines whether the carrier to which the valid SL transmission resources belong is the same as the carrier associated with the triggered SL CSI report.

[0074] When the SL transmission resource is the same as the carrier associated with the SL CSI report, at S107, the RX UE instructs the generation of the SL CSI report MAC CE in the multiplexing and combining process.

[0075] Then at S109, the RX UE sends a MAC PDU including the generated SL CSI report MAC CE to the TX UE on the SL transmission resource. Here, the TX UE is the user equipment that sends the SCI that triggers the SL CSI report.

[0076] The carrier associated with the SL CSI report can be agreed upon between the TX UE that sends the SCI and the RX UE that receives the SCI and triggers the SL CSI report. The TX UE can determine the "carrier corresponding to the SL CSI report" based on the correspondence between the "carrier associated with the SL CSI report" and the "carrier corresponding to the SL CSI report". Here, the "carrier corresponding to the SL CSI report" refers to the carrier where the frequency resources for the SL CSI measurement indicated by the SCI are located.

[0077] In one example, the carrier associated with the SL CSI report may be the carrier where the frequency resources receiving the above-mentioned SCI are located. The TX UE and the RX UE may agree that when the RX UE receives the SCI indicating the SL CSI measurement, the RX UE sends the SL CSI report after performing the SL SCI measurement to the TX UE on the carrier where the frequency resources receiving the above-mentioned SCI are located, that is, sends the MAC PDU containing the SL CSI report MAC CE. When sending the SCI, the TX UE may record the correspondence between the SCI it sends and the carrier sending the SCI. Thus, when receiving the SL CSI report, the TX UE can determine the carrier corresponding to the received SL CSI report based on the carrier receiving the SL CSI report and the above-mentioned correspondence.

[0078] In another example, the carrier associated with the SL CSI report may be the carrier where the frequency resources for the SL CSI measurement indicated by the above SCI are located. The TX UE and the RX UE may agree that when the RX UE receives the SCI indicating the SL CSI measurement, the RX UE sends the SL CSI report on the carrier where the frequency resources for performing the SL CSI measurement are located. Thus, when receiving the SL CSI report, the TX UE can determine the carrier to which the SL CSI report is received as the carrier to which it corresponds.

[0079] In this embodiment, the RX UE may be pre-configured with SL CSI RS configuration information, the SL CSI RS configuration information includes the frequency resource for SL CSI measurement, and the carrier where the frequency resource for SL CSI measurement indicated by SCI is located is determined based on the frequency resource. This example is specifically described in the following embodiment 1.

[0080] Figure 2 The present invention is a flowchart of an example of determining an associated carrier in one embodiment of the present disclosure. In this example, the RXUE is pre-configured with multiple configuration information of the SL CSI RS, each of which includes a first configuration information identifier and carrier identification information. The SCI triggering the SL CSI report includes a second configuration information identifier, and the second configuration information identifier indicates the SL CSI RS configuration information corresponding to the SCI.

[0081] like Figure 2As shown, in S201, the RX UE selects a configuration information whose first configuration information identifier is the same as the second configuration information identifier included in the SCI from multiple configuration information. Then, in S203, the RX UE determines the carrier associated with the SL CSI report based on the carrier identification information in the selected configuration information. This example will be specifically described in Example 2 below.

[0082] Figure 3 is a flowchart of a method for sending an SL SCI report performed by a user equipment according to another disclosed embodiment.

[0083] like Figure 3 As shown, at S301, the RX UE determines whether there is a triggered SL CSI report.

[0084] When there is a triggered SL CSI report, at S303 , the RX UE determines whether there are valid SL transmission resources.

[0085] When there are valid SL transmission resources, at S305 , the RX UE sends a SL CSI report to the TX UE that sends the SCI triggering the SLCSI report on the valid SL transmission resources, where the SL CSI report includes a given carrier identifier associated with the SL CSI report.

[0086] The given carrier identifier included in the SL CSI report may be agreed upon between the TX UE and the RX UE. The TX UE may determine the carrier to which the SL CSI report corresponds based on the agreement and the given carrier identifier in the SL CSI report.

[0087] In one example, the TX UE and the RX UE may agree that when the RX UE sends the SL SCI report, the carrier identifier of the carrier receiving the SCI is used as the given carrier identifier. In this case, when the TX UE sends the SCI, it can record the correspondence between the sent SCI and the carrier sending the SCI, and when receiving the SL CSI report, it can determine the carrier corresponding to the SL CSI report based on the correspondence and the carrier identifier in the SL CSI report.

[0088] In another example, the TX UE and the RX UE may agree that when the RX UE sends the SL SCI report, the carrier identifier of the carrier corresponding to the SL CSI measurement of the SL CSI report is used as the given carrier identifier. In this case, the TX UE can directly determine the carrier corresponding to the SL CSI report based on the given carrier identifier.

[0089] In another example, the TX UE and the RX UE may agree that when the RX UE sends the SL SCI report, the carrier identifier of the carrier associated with the SL CSI report indicated by the SCI is used as the given carrier identifier. In this case, since the carrier identifier of the carrier associated with the SLCSI report is specified by the TX UE, the TX UE can determine the carrier corresponding to the SL CSI report based on the carrier identifier specified by it. Here, the TX UE can specify any carrier identifier as the given carrier identifier, and determine the carrier corresponding to the SL CSI report based on its specified rule and the given carrier identifier.

[0090] about Figure 3 The example shown is described in detail in Example 3 below.

[0091] There may be multiple SL CSI reports triggered. For example, the RX UE may receive SCIs indicating SL SCI measurements on multiple different carriers in the same time period, and multiple SL SCI reports may be triggered.

[0092] At this time, if the space of the SL transmission resource is insufficient to send multiple SL CSI reports at the same time, the SL CSI report to be sent on the SL transmission resource can be determined based on the priority rule. The priority rule may include at least one of the following: a first priority rule, giving priority to SL CSI reports whose corresponding carriers are the same as the carriers where the SL transmission resources are located on the SL transmission resources; a second priority rule, giving priority to SL CSI reports corresponding to the main carrier over SL CSI reports corresponding to the auxiliary carrier; a third priority rule, when timers are set for each of the multiple SL CSI reports, giving priority to sending SL CSI reports with a short remaining running time of the timer; a fourth priority rule, when timers are set for each of the multiple SL CSI reports, giving priority to sending SL CSI reports with a long running time of the timer.

[0093] Here, "first", "second", "third" and "fourth" are only used to distinguish the priority rules, and are not used to limit the importance or priority of each priority. However, it can be set to make the first priority rule take precedence over other priority rules. That is, the highest priority is given to the SLCSI report whose corresponding carrier is the same as the carrier where the SL transmission resource is located on the SL transmission resource. In the case that there is still space left in the SL transmission resource, the SL CSI report to be sent on the SL transmission resource is further determined based on other priority rules. It can also be further set that the second priority rule takes precedence over the third priority rule and the fourth priority rule.

[0094] An example of applying the priority rule will be described in detail in the following embodiment 4.

[0095] Specific examples are provided below to illustrate the present disclosure.

[0096] Example 1

[0097] Step 1: The RX UE receives an SCI from the TX UE, in which the field value of the SL CSI request is '1', thereby instructing the RX UE to generate or report an SL CSI report. The RX UE triggers an SL CSI report according to the SCI, and optionally starts a timer sl-CSI-ReportTimer.

[0098] Preferably, the RX UE can determine the frequency resource or carrier resource (eg, carrier identifier) ​​on which the SCI is received, that is, the RX UE can obtain on which carrier or frequency resource the SCI is received, thereby determining that the carrier or frequency resource is the carrier or frequency information associated with the SCI.

[0099] Step 2: When the RX UE receives the SCI in step 1, a SL CSI report is triggered, and preferably, the RX UE may consider the carrier associated with the triggered SL CSI report as the carrier associated with the SCI that triggers the SL CSI report.

[0100] On the RX UE side, when an SL CSI report is triggered and not canceled, the RX UE determines whether there are SL resources allocated for the first transmission or new transmission.

[0101] If the MAC entity of the RX UE has SL resources allocated for the first transmission or new transmission, the RX UE further determines whether the carrier or frequency associated with the SL resource is associated with or the same as the carrier or frequency associated with the SCI that triggers the SL CSI report; or determines whether the carrier or frequency associated with the SL resource is associated with or the same as the carrier or frequency associated with the triggered SL CSI report. The UE can determine whether the two are the same based on whether the carrier identifiers are the same.

[0102] For example, if the SL resource is located on carrier A, and the SCI triggering the SL CSI report is received on carrier A, then the SL resource can be considered to be associated with the SCI triggering the SL CSI report, or to be associated with the same carrier;

[0103] For another example: if the SL resource is located on a carrier with a carrier identifier of X, and the SCI triggering the SL CSI report is received on a carrier with a carrier identifier of X, then it can be considered that the SL resource is associated with the SCI triggering the SL CSI report, or is associated with the same carrier;

[0104] For another example: the SL resource is located on carrier A, and the carrier associated with the SCI that triggers the SL CSI report is carrier A, then the carrier associated with the triggered SL CSI report is also carrier A, so it can be considered that the SL resource is associated with the triggered SL CSI report, or is associated with the same carrier;

[0105] For another example, if the frequency domain to which the SL resource belongs overlaps, coincides, or partially coincides with the frequency domain of the SCI receiving the SL CSI report that triggers the SL CSI report, then it can be considered that the SL resource is associated with the SCI that triggers the SL CSI report.

[0106] When it is determined that the SL resource is associated with the SCI that triggers the SL CSI report, the RX UE instructs the generation of the SL CSI-report MAC CE in the multiplexing and assembly procedure, and may also cancel the triggered SL CSI report and stop the timer associated with the value.

[0107] As a supplement, if it is determined that the SL resource is not associated with the SCI that triggers the SL CSI report, the above SL CSI-report MAC CE is not generated. For example, if the SL resource is located on carrier A, and the SCI that triggers the SL CSI report is received on carrier B, then it can be considered that the SL resource is not associated with the SCI that triggers the SL CSI report.

[0108] Step 3: assemble the SL-CSI report MAC CE generated in step 2 into a MAC PDU for transmission / sending. Preferably, the MAC PDU including the SL-CSI report MAC CE is transmitted / sent on the SL resource.

[0109] Example 2

[0110] The difference from Embodiment 1 is that, in step 1, in addition to setting the domain value of SL CSI request to '1' to instruct RX UE to generate or report SL CSI report, TX UE may further indicate the configuration information of SL CSI RS in SCI. For example, the configuration information of pre-configured SL CSI RS may include one or more configuration information, each of which has its corresponding identifier or index, and each of which includes at least the following information:

[0111] -sl-CSI-RS-FirstSymbol indicates the first OFDM symbol on a PRB used for SL CSI-RS;

[0112] -sl-CSI-RS-FreqAllocation indicates the number of antenna ports and the frequency domain allocated to the SL CSI-RS

[0113] Preferably, each piece of configuration information may further include a carrier identifier, or the carrier identifier may be included in the configuration information sl-CSI-RS-FreqAllocation.

[0114] Then, in addition to indicating the SL CSI request, the SCI may further indicate the configuration information identifier of the SL CSI RS. According to the configuration information corresponding to the configuration information identifier, the RX UE may determine the transmission of the SL CSI RS, and thus perform measurement and reporting.

[0115] Since the SLCSI RS configuration information provides carrier information, it can be considered that the carrier associated with the SCI is the carrier indicated in the SLCSI RS configuration information, and the carrier associated with the SCI in Embodiment 1 is the frequency resource or carrier resource receiving the SCI. Then the implementation method of step 2 can be as follows:

[0116] Step 2: When the RX UE receives the SCI in step 1, a SL CSI report is triggered, and preferably, the RX UE may consider the carrier associated with the triggered SL CSI report as the carrier associated with the SCI that triggered the SL CSI report. On the RX UE side, when a SL CSI report is triggered and not canceled, the RX UE determines whether there are SL resources allocated for the first transmission or new transmission.

[0117] If the MAC entity of the RX UE has SL resources allocated to the first transmission or new transmission (new transmission), the RX UE further determines whether the carrier associated with the SL resource is the same as the carrier associated with the SCI that triggers the SL CSI report, where the carrier associated with the SL resource is the carrier where the SL resource is located; or further determines whether the carrier associated with the SL resource is the same as the carrier of the SL CSI RS being measured (that is, the carrier indicated or included in the configuration information corresponding to the SL CSI RS configuration information identifier indicated in the SCI that triggers the SL CSI report):

[0118] For example, if the SL resource is located on carrier A, and the carrier included in the SL CSI RS configuration information indicated in the SCI that triggers the SL CSI report is also carrier A, then it can be considered that the SL resource is associated with the SCI that triggers the SL CSI report, or is associated with the same carrier;

[0119] For another example: the SL resource is located on carrier A, and the carrier indicated or included in the configuration information corresponding to the SL CSI RS configuration information identifier indicated in the SCI that triggers the SL CSI report is carrier A, then the carrier associated with the triggered SL CSI report is also carrier A, so it can be considered that the SL resource is associated with the triggered SL CSI report, or is associated with the same carrier;

[0120] When it is determined that the SL resource is associated with the SCI that triggers the SL CSI report, the RX UE instructs the generation of the SL CSI-report MAC CE in the multiplexing and assembly procedure, and may also cancel the triggered SL CSI report and stop the timer associated with the value.

[0121] As a supplement, if it is determined that the SL resource is not associated with the SCI that triggers the SL CSI report, or the SL resource is not associated with the triggered SL CSI report, the above-mentioned SL CSI-report MAC CE is not generated. For example, if the SL resource is located on carrier A, and the configuration information of the SL CSI RS indicated by the SCI that triggers the SL CSI report includes the identification information of carrier B, then it can be considered that the SL resource is not associated with the SCI that triggers the SL CSI report.

[0122] Step 3: The UE may further assemble the SL-CSI report MAC CE generated in step 2 into a MAC PDU for transmission / sending.

[0123] Another implementation of this embodiment may be:

[0124] In step 1, the TX UE may further indicate the configuration information identifier of the SL CSI RS in addition to indicating the SL CSI request in the SCI. According to the configuration information corresponding to the configuration information identifier, the RX UE may determine the transmission of the SL CSI RS, and thus perform measurement and reporting.

[0125] In step two, on the RX UE side, when the RX UE receives the SCI in step one triggering a SL CSI report, and preferably, the RX UE considers that the carrier associated with the SL CSI report is the carrier of the SL CSI RS to be measured, that is, the carrier indicated or included in the configuration information corresponding to the SL CSI RS configuration information identifier indicated in the SCI that triggers the SL CSI report.

[0126] When an SL CSI report is triggered and not canceled, the RX UE determines whether there are SL resources allocated for the first transmission or new transmission. If the MAC entity of the RX UE has SL resources allocated for the first transmission or new transmission, the RX UE further determines whether the carrier associated with the SL resource is the same as the carrier associated with the SL CSI report:

[0127] When it is determined that the carrier where the SL resource is located is the same as, associated with, or corresponding to the carrier of the triggered SL CSI report, it can be considered that the SL resource is associated with the triggered SL CSI report, and the RX UE instructs the generation of the SL CSI-report MAC CE in the multiplexing and assembly procedure. And the triggered SL CSI report can also be canceled and the timer associated with the value can be stopped.

[0128] As a supplement, if it is determined that the carrier where the SL resource is located is not the same as the carrier associated with the triggered SL CSI report, or is not associated or does not correspond, it can be considered that the SL resource and the triggered SL CSIreport are not associated, and the above-mentioned SL CSI-report MAC CE is not generated. For example, the SL resource is located on carrier A, and the configuration information of the SL CSI RS indicated by the SCI that triggers the SL CSI report contains the identification information of carrier B, that is, the carrier associated with the triggered SL CSI report is carrier B, then it can be considered that the carrier located is not associated with the carrier associated with the triggered SL CSIreport.

[0129] Step 3: The UE may further assemble the SL-CSI report MAC CE generated in step 2 into a MAC PDU for transmission / sending.

[0130] Example 3

[0131] The aforementioned embodiment provides a method for enabling the TXUE to identify the carrier information associated with the SL CSI report without expanding the SL-CSI report MAC CE space.

[0132] When the SL-CSI report MAC CE space is not limited, the RX UE may indicate the carrier identification information in the SL-CSI report MAC CE. The specific implementation may be:

[0133] Step 1: The RX UE receives the SCI from the TX UE, in which the field value of the CSI request is '1', thereby instructing the RX UE to generate an SL CSI report. The RX UE triggers an SL CSI report according to the SCI, and optionally starts a timer sl-CSI-ReportTimer.

[0134] Preferably, the RX UE can determine the frequency resource or carrier resource on which the SCI is received, that is, the RX UE can obtain on which carrier or frequency resource the SCI is received, thereby determining the carrier or frequency information associated with the SCI.

[0135] Step 2: At the RX UE side, when an SL CSI report is triggered and not canceled, the RX UE determines whether there are SL resources allocated for the first transmission or new transmission.

[0136] If the MAC entity of the RX UE has SL resources allocated for the first transmission or new transmission, the RX UE instructs the generation of the SL CSI-report MAC CE in the multiplexing and assembly procedure, and can also cancel the triggered SL CSI report and stop the timer associated with the value.

[0137] The generated SL CSI report MAC CE also indicates the carrier information or frequency information determined in step 1 in the aforementioned embodiment, and preferably, is carried in the carrier identification information.

[0138] Step 3: Assemble the SL-CSI report MAC CE generated in step 2 into a MAC PDU for transmission / sending.

[0139] The specific implementation method may also be:

[0140] In step 1, in addition to setting the domain value of SL CSI request to '1' to indicate a request for SL CSI report, the TX UE may further indicate the configuration information of SL CSI RS. For example, the pre-configured configuration information of SL CSI RS may include one or more configuration information, each of which has its corresponding identifier or index, and each of which includes at least the following information:

[0141] -sl-CSI-RS-FirstSymbol indicates the first OFDM symbol on a PRB used for SL CSI-RS;

[0142] -sl-CSI-RS-FreqAllocation indicates the number of antenna ports and the frequency domain allocated to the SL CSI-RS

[0143] Preferably, each piece of configuration information may further include a carrier identifier, or the carrier identifier may be included in the configuration information sl-CSI-RS-FreqAllocation.

[0144] Then, in addition to indicating the SL CSI request, the SCI may further indicate the configuration information identifier of the SL CSI RS. According to the configuration information corresponding to the configuration information identifier, the RX UE may determine the transmission of the SL CSI RS, and thus perform measurement and reporting.

[0145] Step 2: At the RX UE side, when an SL CSI report is triggered and not canceled, the RX UE determines whether there are SL resources allocated for the first transmission or new transmission.

[0146] If the MAC entity of the RX UE has SL resources allocated for the first transmission or new transmission, the RX UE instructs the generation of the SL CSI-report MAC CE in the multiplexing and assembly procedure, and can also cancel the triggered SL CSI report and stop the timer associated with the value.

[0147] The generated SL CSI report MAC CE also indicates the carrier information contained in the SL CSI RS configuration information indicated in the SCI that triggers the SL CSI report, such as the carrier identifier. Preferably, such a carrier identifier is indicated in the generated SL-CSI report MAC CE.

[0148] Step 3: Assemble the SL-CSI report MAC CE generated in step 2 into a MAC PDU for transmission / sending.

[0149] Example 4

[0150] On the basis of the above-mentioned embodiment, if the SL resources used for new transmission in step 2 cannot accommodate multiple SLCSI reports at the same time, the multiple SL CSI reports here correspond to different carriers respectively, and these SL CSI reports can correspond to multiple SL-CSI report MAC CEs or one SL-CSI report MAC CE. Then how to determine which carriers' SL CSI reports can use the current SL resources, and which carriers' SL CSI reports need to wait for the SL resources at the next moment is a problem that needs to be solved. That is, which carrier or carriers' SL CSI reports on the SL resources can be reported preferentially by the current SL resources.

[0151] In one case, the SL CSI report to be transmitted with priority is determined according to the carrier associated with the SL resource used for new transmission. For example, the carrier associated with the SL resource currently used for new transmission is carrier A, that is, the SL resource is located on carrier A. Among the one or several SL CSI reports to be transmitted or triggered, at least one carrier associated with the SL CSI report is also carrier A, then the SL CSI report can be transmitted in priority in this SL resource, that is, space for the SL CSI report of carrier A is reserved in the SL resource. Then, if there is no remaining space, the remaining SL CSI report will be transmitted in the SL resource at the next moment. If there is still remaining space and it can accommodate at least one SL CSI report, then the selection can continue according to other principles. Among them, the carrier associated with the SL CSI report can be the carrier associated with the SCI that triggers the SL CSI report, or it can be the carrier where the measurement signal SL CSIRS corresponding to the SL CSI report is located. The method for determining these carriers is as described in the above-mentioned embodiment.

[0152] In another case, it can also be determined according to the carrier priority. For example, if there are a primary carrier and a secondary carrier in the carrier configured by the UE, then when one of the carriers associated with an SL CSI report among multiple SL CSI reports is a primary carrier, the SL CSI report corresponding to the primary carrier is always selected to generate the SL CSI report and transmit it.

[0153] In another case, the preferred SL CSI report is determined according to the running status of the timer the sl-CSI-ReportTimer. As shown above, when an SL CSI report is triggered, the UE can start the timer the sl-CSI-ReportTimer. When the timer the sl-CSI-ReportTimer runs out, the UE can cancel its corresponding, triggered SL CSI report. Then, according to the running status of the timer the sl-CSI-ReportTimer, the following can be selected:

[0154] Assume that the remaining time of the sl-CSI-ReportTimer corresponding to the SL CSI report of carrier A is X, and the remaining time of the sl-CSI-ReportTimer corresponding to the SL CSI report of carrier B is Y, and X < Y. Then, the SL CSI report with less remaining time is preferentially selected to generate the corresponding SL CSI report MAC CE, that is, the SL CSI report of carrier A is preferentially selected; here, the remaining time is equal to the total duration of the timer minus the elapsed duration.

[0155] Or assume that the elapsed duration of the sl-CSI-ReportTimer corresponding to the SL CSI report of carrier A is M, and the elapsed duration of the sl-CSI-ReportTimer corresponding to the SL CSI report of carrier B is N, and M > N. Then, the SL CSI report with a longer elapsed time is preferentially selected to generate the corresponding SL CSI report MAC CE, that is, the SL CSI report of carrier A.

[0156] Here, it is assumed that the sl-CSI-ReportTimer starts timing from 0 until it reaches the maximum running time, that is, the pre-configured total duration of the timer, and then it is considered to have timed out.

[0157] Two or three of the above principles can be combined and used.

[0158] For example, in the case of multiple SL CSI reports, if the SL resources cannot accommodate all the SL CSI reports, the SL CSI report associated with the primary carrier can be selected first. Then, if there is still remaining space, the SL CSI report associated with the carrier associated with the SL resources can be continued to be selected; if there is still remaining space, it can be selected according to the running status of the timer.

[0159] Or in the case of multiple SL CSI reports, if the SL resources cannot accommodate all the SL CSI reports, the SL CSI report associated with the carrier associated with the SL resources can be selected first; if there is still remaining space, it can be selected according to the running status of the timer.

[0160] After selecting the corresponding one or more SL CSI reports, the RX UE instructs the generation of a corresponding SL CSI-report MAC CE containing the selected SL CSI report or reports in the multiplexing and assembly procedure, or generates a SL CSI-report MAC CE containing all the selected SL CSI reports. The corresponding triggered SL CSI report can also be canceled, and the timer associated with it can be stopped. Preferably, the SL CSI-report MAC CE also indicates the corresponding carrier information that triggers the SLCSI report, and the method for determining the carrier information is as shown in the aforementioned embodiment.

[0161] The UE then assembles the SL-CSI report MAC CE generated in step 2 into a MAC PDU for transmission / sending.

[0162] Figure 4 FIG. 4 is a block diagram showing a user equipment 400 according to an embodiment of the present disclosure. Figure 4 As shown, the user device 400 includes a processor 401 and a memory 402. The processor 401 may include, for example, a microprocessor, a microcontroller, an embedded processor, etc. The memory 402 may include, for example, a volatile memory (such as a random access memory RAM), a hard disk drive (HDD), a non-volatile memory (such as a flash memory), or other memory, etc. The memory 402 stores program instructions. When the instructions are executed by the processor 401, the above-mentioned method (such as the method of executing the user device) described in detail in the present disclosure may be executed. Figures 1 to 3 ).

[0163] The program running on the device according to the present disclosure may be a program that enables a computer to implement the functions of the embodiments of the present disclosure by controlling a central processing unit (CPU). The program or information processed by the program may be temporarily stored in a volatile memory (such as a random access memory RAM), a hard disk drive (HDD), a non-volatile memory (such as a flash memory), or other memory systems.

[0164] The program for realizing the functions of each embodiment of the present disclosure can be recorded on a computer-readable recording medium. The corresponding functions can be realized by making a computer system read the program recorded on the recording medium and executing these programs. The so-called "computer system" herein can be a computer system embedded in the device, and can include an operating system or hardware (such as a peripheral device). "Computer-readable recording medium" can be a semiconductor recording medium, an optical recording medium, a magnetic recording medium, a recording medium of a short-term dynamic storage program, or any other recording medium readable by a computer.

[0165] The various features or functional modules of the devices used in the above embodiments can be implemented or executed by circuits (e.g., monolithic or multi-chip integrated circuits). Circuits designed to perform the functions described in this specification may include general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic, discrete hardware components, or any combination of the above devices. The general-purpose processor may be a microprocessor, or any existing processor, controller, microcontroller, or state machine. The above circuits may be digital circuits or analog circuits. In the case where new integrated circuit technologies have emerged to replace existing integrated circuits due to advances in semiconductor technology, one or more embodiments of the present disclosure may also be implemented using these new integrated circuit technologies.

[0166] In addition, the present disclosure is not limited to the above-mentioned embodiments. Although various examples of the embodiments have been described, the present disclosure is not limited thereto. Fixed or non-mobile electronic devices installed indoors or outdoors can be used as UE devices or communication devices, such as AV equipment, kitchen equipment, cleaning equipment, air conditioners, office equipment, vending machines, and other household appliances.

[0167] As mentioned above, the embodiments of the present disclosure have been described in detail with reference to the accompanying drawings. However, the specific structure is not limited to the above embodiments, and the present disclosure also includes any design changes that do not deviate from the main purpose of the present disclosure. In addition, various changes can be made to the present disclosure within the scope of the claims, and the embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present disclosure. In addition, the components with the same effect described in the above embodiments can be replaced by each other.

Claims

1. A method for sending a SL SCI report performed by a user equipment, comprising: When there is a triggered SL CSI report, determining whether there are valid SL transmission resources; When there is a valid SL transmission resource, determining whether the carrier to which the SL transmission resource belongs is the same as the carrier associated with the SL CSI report; and When the SL transmission resource is the same as the carrier associated with the SL CSI report, it indicates that a SL CSI report MAC CE is generated during the multiplexing and combining process, and a MAC PDU including the SL CSI report MAC CE is sent on the SL transmission resource to a sending user equipment that sends the SCI.

2. The method according to claim 1, wherein: The carrier associated with the SL CSI report includes any one of the following: The carrier on which the frequency resource of the received SCI is located; The SCI indicates the carrier on which the frequency resource for SL CSI measurement is located.

3. The method according to claim 2, wherein: The user equipment is pre-configured with SL CSI RS configuration information, The SL CSI RS configuration information includes the frequency resource for SL CSI measurement, The carrier on which the frequency resource for SL CSI measurement indicated by the SCI is located is determined based on the frequency resource.

4. The method according to claim 1, wherein: The user equipment is pre-configured with multiple configuration information of the SL CSI RS, each of the multiple configuration information includes a first configuration information identifier and carrier identifier information, The SCI triggering the SL CSI report includes a second configuration information identifier, where the second configuration information identifier indicates configuration information of the SL CSI RS corresponding to the SCI, The method further comprises: Selecting one configuration information whose first configuration information identifier is the same as the second configuration information identifier included in the SCI from the plurality of configuration information; and Based on the carrier identification information in the one configuration information, determine a carrier associated with the SL CSI report.

5. A method for sending a SL SCI report performed by a user equipment, comprising: When there is a triggered SL CSI report, determining whether there are valid SL transmission resources; When there is a valid SL transmission resource, sending the SL CSI report to a sending user equipment that sends the SCI that triggers the SL CSI report on the SL transmission resource, wherein the SL CSI report includes a given carrier identifier associated with the SL CSI report, The carrier identifier is determined by at least one of the following: Using the carrier identifier of the carrier receiving the SCI as the given carrier identifier; Using the carrier identifier of the carrier corresponding to the SL CSI measurement of the SL CSI report as the given carrier identifier; The carrier identifier of the carrier associated with the SL CSI report indicated by the SCI is used as the given carrier identifier.

6. The method according to claim 5, wherein: The method further comprises: When there are multiple triggered SL CSI reports and the space of the SL transmission resource is insufficient to simultaneously send the multiple SL CSI reports, the SL CSI report to be sent on the SL transmission resource is determined based on a priority rule.

7. The method according to claim 6, wherein: The priority rules include at least one of the following: A first priority rule is to give priority to transmitting, on the SL transmission resource, an SL CSI report corresponding to a carrier that is the same as the carrier on which the SL transmission resource is located; The second priority rule is that the SL CSI report corresponding to the primary carrier takes precedence over the SL CSI report sent corresponding to the secondary carrier; A third priority rule, when a timer is set for each of the plurality of SL CSI reports, the SL CSI report with the shortest remaining running time of the timer is sent first; A fourth priority rule is that when a timer is set for each of the plurality of SL CSI reports, the SL CSI report for which the timer has been running for a longer time is sent first.

8. The method according to claim 7, wherein: The first priority rule takes precedence over other priority rules.

9. A user equipment, comprising: processor; as well as A memory, wherein instructions are stored in the memory; When the instructions are executed by the processor, the user equipment is caused to execute the method according to any one of claims 1-8.

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