Data transmission method, device and system

Abstract

An embodiment of the present invention provides a data transmission method, an apparatus and a system, the data transmission method being applied to a first terminal device, the first terminal device and a second terminal device performing sidelink transmission, the second terminal device using sidelink discontinuous reception (SL DRX), the method including: determining a sidelink resource by the first terminal device; selecting a destination associated with the sidelink resource by the first terminal device in a Logical Channel Prioritization (LCP) procedure; and transmitting the sidelink transmission by the first terminal device to the second terminal device corresponding to the selected destination.

Description

[Technical field]

[0001] FIELD OF THE DISCLOSURE The present invention relates to the field of communications technology. [Background technology]

[0002] In Version 17 (Release 17) of the existing standard, one enhancement of the new radio sidelink (NR sidelink) is power saving, which allows terminal devices with battery limitations to perform sidelink operations in a power-efficient manner. The design of the NR sidelink in Version 16 (Release 16) of the existing standard focuses only on terminal devices with sufficient battery capacity, e.g., installed in automobiles, and is based on the assumption that the terminal devices are always online when performing sidelink operations. In Release 17, power saving schemes are required for vulnerable road users (VRUs) in Vehicle to Everything (V2X) usage scenarios, pedestrian users, and terminal devices that need to minimize power consumption in public safety and commercial scenarios.

[0003] In existing standards, in order to save power, a terminal device may be configured with downlink discontinuous reception (DRX), and when DRX is configured in the terminal device, the terminal device does not need to continuously monitor the physical downlink control channel (PDCCH).

[0004] Currently, with regard to sidelink DRX (SL DRX), the Radio Access Network Group 2 (RAN2) of the Third Generation Partnership Project (3GPP (registered trademark)) has agreed to the following:

[0005] For a unicast sidelink (SL unicast), for example, after the SL unicast link is established, the SL DRX configuration may be configured for each source address+destination address pair.

[0006] For the groupcast sidelink (SL groupcast) and the broadcast sidelink (SL broadcast), the SL DRX configuration may be commonly configured, and the granularity of the configuration also needs to be studied.

[0007] Regarding data reception, an operation of monitoring sidelink control information (SCI) reception during the active time of SL DRX is defined, where the SCI here is the second stage SCI on the physical sidelink control channel (PSCCH) and the physical sidelink shared channel (PSSCH), and is abbreviated as 2nd stage SCI.

[0008] For data reception, the terminal device may skip monitoring the PSCCH and 2nd stage SCI during the inactive time of SL DRX.

[0009] Currently, in the sidelink multiplexing and assembly procedure, in the logical channel prioritization (LCP) procedure, the transmitting device (Tx UE) selects one destination for a new transmission when receiving sidelink resources from a network device or when autonomously selecting sidelink resources, i.e., transmits data of the new transmission to a destination device or receiving device (Rx UE), selects a logical channel corresponding to the selected destination, and performs sidelink resource allocation. In the existing standard, in the destination selection procedure, the transmitting device selects the logical channel with the highest logical channel priority or the destination where the MAC CE is located.

[0010] The above description of the background art is merely for the purpose of more clearly and completely explaining the configurations of the present invention and for the understanding of those skilled in the art, and should not be construed as meaning that these configurations are well known to those skilled in the art just because they are described in the background art of the present invention. Summary of the Invention [Problem to be solved by the invention]

[0011] According to the findings of the inventors of the present invention, when a receiving device (Rx UE) is configured with SL DRX, the Rx UE receives second stage Sidelink Control Information (SCI) carried on a Physical Sidelink Control Channel (PSCCH) and a Physical Sidelink Shared Channel (PSSCH) during the inactive time of the SL DRX. nd Therefore, the Tx UE needs to obtain related information such as the SL DRX configuration of the Rx UE or determine related information such as the SL DRX configuration of the Rx UE by itself, so as to transmit sidelink transmission (SL transmission) to the Rx UE during the active time period of the SL DRX of the Rx UE.

[0012] However, when one Tx UE performs sidelink transmission to multiple Rx UEs, the following occurs:

[0013] In mode-1, the network device can allocate an SL grant based on a sidelink-buffer status report (SL-BSR) reported by a Tx UE to the network device, but the resource indicated by the SL grant (abbreviated as SL grant or SL resource) is not necessarily located in the active time of the SL DRX of the Rx UE. Even if the network device knows related information such as the SL DRX configuration of one or more Rx UEs, for example, even if the Tx UE reports related information such as the SL DRX configuration of one or more Rx UEs to the network device, or even if the network device determines related information such as the SL DRX configuration of one or more Rx UEs, the network device can only allocate an SL grant based on a logical channel (LCH) corresponding to a logical channel group (LCG) in the SL-BSR report and its priority, but cannot know a logical channel with the highest logical channel priority selected by the Tx UE in a subsequent LCP (logical channel priority processing) procedure or a destination where a MAC CE is located. Therefore, the resource indicated by the SL grant allocated by the network device may be outside the active time of the SL DRX corresponding to the destination selected by the Tx UE in the LCP procedure, i.e., the SL resource in which the sidelink medium access control protocol data unit (SL MAC PDU) transmitted by the Tx UE is located may be outside the active time of the SL DRX corresponding to the destination of the SL MAC PDU, so that the Rx UE of the destination cannot correctly receive the sidelink transmission in the resource indicated by the SL grant.

[0014] In mode-2, the SL grant (or SL resource) is autonomously selected by the Tx UE. Even if the Tx UE considers related information such as the SL DRX configuration of one or more Rx UEs when selecting the SL resource, the logical channel or MAC CE with the highest logical channel priority may change in the subsequent LCP procedure, so the destination selected in the LCP procedure may differ from the destination referenced when selecting the SL resource. Therefore, the SL resource may be located outside the active time of the SL DRX corresponding to the destination selected by the Tx UE in the LCP procedure, i.e., the SL resource in which the SL MAC PDU transmitted by the Tx UE is located may be located outside the active time of the SL DRX corresponding to the destination of the SL MAC PDU. Therefore, the Rx UE of the destination cannot correctly receive the sidelink transmission on the SL resource.

[0015] In view of at least one of the above problems, embodiments of the present invention provide a data transmission method, apparatus and system. [Means for solving the problem]

[0016] In one aspect of an embodiment of the present invention, there is provided a data transmission device configured in a first terminal device, wherein the first terminal device and a second terminal device perform sidelink transmission, and the second terminal device uses sidelink discontinuous reception (SL DRX), and the device includes: a determination unit that determines sidelink resources; a selection unit that selects a destination associated with the sidelink resources in a Logical Channel Prioritization (LCP) procedure; and a transmission unit that transmits the sidelink transmission to the second terminal device corresponding to the selected destination.

[0017] In another aspect of an embodiment of the present invention, there is provided a data transmission device configured in a first terminal device, wherein the first terminal device and a second terminal device perform sidelink transmission, and the second terminal device uses sidelink discontinuous reception (SL DRX), the device including: a determination unit that determines sidelink resources; a selection unit that selects a destination in a Logical Channel Priority Processing (LCP) procedure, the sidelink resources being located within a SL DRX active time corresponding to the destination; and a transmission unit that transmits the sidelink transmission to the second terminal device corresponding to the selected destination.

[0018] In another aspect of an embodiment of the present invention, there is provided a resource scheduling device configured in a network device, the network device allocating sidelink resources to a first terminal device, the device including: a receiver unit configured to receive information regarding a SL DRX active time transmitted by the first terminal device, the information regarding the SL DRX active time including SL DRX active time information corresponding to a destination or a source-destination pair; and an allocator unit configured to allocate sidelink resources to the first terminal device based on the information regarding the SL DRX active time.

[0019] One of the advantageous effects of the embodiments of the present invention is as follows: By selecting a destination associated with a SL grant in the LCP procedure, or selecting a destination in the LCP procedure such that the SL grant is located within the SL DRX active time corresponding to the destination, a sidelink transmission using resources indicated by the SL grant will be sent in the SL DRX active time of the destination corresponding to the SL grant, and an Rx UE corresponding to the destination can correctly receive the sidelink transmission.

[0020] As shown in the following description and drawings, specific embodiments of the present invention are disclosed in detail to show how the principles of the present invention can be employed. However, the scope of the embodiments of the present invention is not limited to these. The embodiments of the present invention include modifications, alterations, and equivalents within the spirit and scope of the appended claims.

[0021] Features described and / or illustrated in one embodiment may be used in the same or similar manner in one or more other embodiments and may be combined with or substituted for features in the other embodiments.

[0022] It should be noted that in this text, the term "including / having" means the presence of a feature, element, step or component, and does not exclude the presence or addition of one or more other features, elements, steps or components. [Brief description of the drawings]

[0023] Elements and features depicted in one drawing and one embodiment of the present invention may be combined with elements and features shown in one or more drawings or embodiments, and in the drawings, like reference numerals may designate corresponding elements in multiple drawings and may designate corresponding elements used in more than one embodiment. [Figure 1] FIG. 2 is a schematic diagram of an example of a DRX cycle. [Diagram 2] FIG. 1 is a schematic diagram of a scenario in which a transmitting device and multiple receiving devices perform sidelink transmission. [Diagram 3] 2 is a schematic diagram of an example of a data transmission method according to an embodiment of the present invention; [Figure 4] FIG. 13 is a schematic diagram of another scenario in which a transmitting device and multiple receiving devices perform sidelink transmission. [Diagram 5] 2 is a schematic diagram of an example of a data transmission method according to an embodiment of the present invention; [Figure 6] FIG. 13 is a schematic diagram of another scenario in which a transmitting device and multiple receiving devices perform sidelink transmission. [Figure 7] 2 is a schematic diagram of an example of a data transmission method according to an embodiment of the present invention; [Figure 8] 4 is a schematic diagram of another example of a data transmission method according to an embodiment of the present invention; [Figure 9] 2 is a schematic diagram of an example of a resource scheduling method according to an embodiment of the present invention; [Figure 10] 1 is a schematic diagram of an example of a data transmission device according to an embodiment of the present invention. [Figure 11] 1 is a schematic diagram of an example of a data transmission device according to an embodiment of the present invention. [Figure 12] 1 is a schematic diagram of an example of a data transmission device according to an embodiment of the present invention. [Figure 13] FIG. 11 is a schematic diagram of another example of a data transmission device according to an embodiment of the present invention. [Figure 14] 1 is a schematic diagram of an example of a resource scheduling device according to an embodiment of the present invention; [Figure 15] FIG. 2 is a schematic diagram of an example of a terminal device according to an embodiment of the present invention. [Figure 16] FIG. 2 is a schematic diagram of an example of a network device according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] The above and other features of the present invention will become apparent from the following description. In the specification and drawings, specific embodiments of the present invention are disclosed in detail, and some of the embodiments in which the principles of the present invention can be adopted are shown. However, the present invention is not limited to the described embodiments. The present invention includes all modifications, variations, and equivalents within the scope of the appended claims. Each embodiment of the present invention will be described below with reference to the drawings. These embodiments are merely illustrative and do not limit the present invention.

[0025] In embodiments of the present invention, the terms "first", "second", etc. are used in the title to distinguish different elements, but do not represent the spatial arrangement or temporal order of these elements, and these elements are not limited to these terms. The term "and / or" includes any and all combinations of one or more of the terms listed in the associated list. The terms "including", "comprising", "having", etc. refer to the presence of listed features, elements, elements or components, but do not exclude the presence or addition of one or more other features, elements, elements or components.

[0026] In the embodiments of the present invention, the singular forms "a", "the", etc., include the plural forms and should be understood broadly as "one kind" or "a class", and are not limited to "one". In addition, the term "said" should be understood to include both the singular and the plural forms, unless the context clearly indicates otherwise. In addition, the term "described in" should be understood to mean "described at least in part", and the term "based on" should be understood to mean "based at least in part on", unless the context clearly indicates otherwise.

[0027] In an embodiment of the present invention, the term "communication network" or "wireless communication network" may refer to a network conforming to any communication standard, such as, for example, Long Term Evolution (LTE), Advanced Long Term Evolution (LTE-A, LTE-Advanced), Wideband Code Division Multiple Access (WCDMA), High-Speed ​​Packet Access (HSPA), etc.

[0028] Additionally, communications between devices in a communication system may occur according to any stage of communication protocols, including, but not limited to, 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G, and 5G, New Radio (NR), and / or other currently known or future developed communication protocols.

[0029] In the embodiment of the present invention, the term "network device" refers to a device in a communication system, for example, allowing a terminal device to access the communication system and providing a service to the terminal device. The network device may include, but is not limited to, a base station (BS), an access point (AP), a transmission reception point (TRP), a broadcast transmitter, a mobility management entity (MME), a gateway, a server, a radio network controller (RNC), a base station controller (BSC), etc.

[0030] Among them, the base station may include, but is not limited to, a Node B (NodeB or NB), an evolved Node B (eNodeB or eNB), and a 5G base station (gNB), etc., as well as a Remote Radio Head (RRH), a Remote Radio Unit (RRU), a relay, or a low power node (e.g., femto, pico, etc.). Also, the term "base station" may include some or all of the functions thereof, and each base station may provide communication coverage for a particular geographic area. The term "cell" may refer to a base station and / or its coverage area depending on the context in which the term is used.

[0031] In the embodiment of the present invention, the term "User Equipment" (UE) or "Terminal Equipment" (TE) refers to an apparatus that accesses a communication network and receives a network service via, for example, a network device. The terminal apparatus may be fixed or mobile, and may be called a mobile station (MS), a terminal, a subscriber station (SS), an access terminal (AT), a station, etc.

[0032] Among them, the terminal device may include, but is not limited to, a mobile phone, a personal digital assistant (PDA), a wireless modulation / demodulation device, a wireless communication device, a handheld device, a machine-type communication device, a laptop computer, a cordless phone, a smartphone, a smart watch, a digital camera, and the like.

[0033] For example, in a scenario such as the Internet of Things (IoT), the user equipment may be a monitoring or measuring device or equipment, including, but not limited to, a Machine Type Communication (MTC) terminal, an in-vehicle communication terminal, a Device to Device (D2D) terminal, a Machine to Machine (M2M) terminal, etc.

[0034] Furthermore, the term "network side" or "network device side" refers to the side of a network, which may be a base station or may include one or more of the network devices mentioned above. The term "user side" or "terminal side" or "terminal device side" refers to the side of a user or terminal, which may be a UE or may include one or more of the terminal devices mentioned above. In this specification, unless otherwise specified, "device" may refer to a network device or may refer to a terminal device.

[0035] The following describes an embodiment scenario of the present invention with reference to an example, but the present invention is not limited thereto.

[0036] FIG. 1 is a schematic diagram of an example of a DRX cycle. As shown in FIG. 1, the SL DRX cycle specifies a duration (On Duration) and a possible inactive time thereafter (Opportunity for DRX). The duration is the duration during which the terminal device waits to receive an SCI after waking up from a sleep state (for example, including monitoring a first stage SCI in a PSCCH and a second stage SCI in a PSSCH). If the terminal device successfully decodes an SCI for scheduling a new transmission transmitted to itself, the terminal device starts an inactivity timer (SL inactivity timer) while maintaining the sleep-up state. The inactivity timer means the duration of the terminal device from the last successful decoding of the PDCCH to the successful decoding of the SCI. If the SCI has not been successfully decoded within the time counted by the inactivity timer, the terminal device returns to a sleep state. After the terminal device successfully decodes an SCI used only for the initial transmission in one attempt, the terminal device needs to start the inactivity timer.

[0037] In an embodiment of the present invention, the active time of SL DRX means the total time during which a terminal device monitors an SCI (e.g., including monitoring of a PSCCH and monitoring of a second stage SCI in a PSSCH), and includes the on-duration of the SL DRX period, the time during which a terminal device performs continuous reception when an inactivity timer has not timed out, and the time during which a terminal device performs continuous reception and waits for a retransmission opportunity.

[0038] In an embodiment of the present invention, the DRX configuration may further include a retransmission timer, which defines the duration for which a retransmission is expected.

[0039] FIG. 2 is a schematic diagram of one scenario in which a transmitting device (Tx UE) and multiple receiving devices (Rx UEs) perform sidelink transmission. As shown in FIG. 2, there are two situations in this scenario. In situation 1, the SL grant (mode-1) allocated by the network device or the SL grant (mode-2) autonomously selected by the Tx UE does not consider the SL DRX configuration or active time corresponding to destination 1 or destination 2. In situation 2, the SL grant (mode-1) allocated by the network device or the SL grant (mode-2) autonomously selected by the Tx UE considers the SL DRX configuration or active time. When the Tx UE sends an SL BSR to the network device to request the network device to allocate an SL grant or the Tx UE autonomously selects an SL grant, the Tx UE has an LCH1 (priority is 2) for destination 1 and an LCH2 (priority is 3) for destination 2 in its buffer. Therefore, since the priority of LCH1 is relatively high, the SL grant allocated by the network device or the SL grant autonomously selected by the Tx UE may take into account the active time of the SL DRX corresponding to destination 1 where LCH1 is located.

[0040] In the above two situations, when Tx UE subsequently performs multiplexing and reassembly of MAC PDU for the SL grant, new data arrives in LCH3 of destination 2 in the LCP procedure, and LCH3 has the highest priority (priority is 1), so Tx UE may select destination 2 where LCH3 is located as the destination of the MAC PDU to assemble the MAC PDU. However, because the resource indicated by the SL grant is outside the SL DRX active time corresponding to destination 2, Rx UE 2 of destination 2 cannot correctly receive the sidelink transmission in the SL grant.

[0041] The present invention is proposed to ensure that the transmission resource of a sidelink transmission (resource indicated by SL grant) is within the active time of the SL DRX of the destination corresponding to the sidelink transmission, so that the Rx UE of the destination can correctly receive the sidelink transmission.

[0042] In the embodiment of the present invention, an example is described in which a first terminal device and a second terminal device perform sidelink transmission. Here, the second terminal device has or uses SL DRX, in other words, the second terminal device is configured with SL DRX or performs SL DRX operation. Here, the SL DRX configuration may be configured for the second terminal device by a network device, may be pre-configured for the second terminal device, or may be configured for the second terminal device via a sidelink by the first terminal device (for example, using an RRC reconfiguration sidelink message, etc.). Here, the sidelink transmission may include transmission of sidelink data or control information, or feedback information, or a reference signal, etc. Also, from the viewpoint of transmission of sidelink transmission, the first terminal device according to the embodiment of the present invention is a transmitting device (Tx UE), and the second terminal device is a receiving device (Rx UE).

[0043] Hereinafter, examples of the present invention will be described with reference to the drawings and embodiments.

[0044] <Example 1> An embodiment of the present invention provides a data transmission method, which is described from the first terminal device side.

[0045] 3 is a schematic diagram of an example of a data transmission method according to an embodiment of the present invention. As shown in FIG. 3, the method includes the following steps:

[0046] Step 301: The first terminal device determines a sidelink resource (SL grant or SL resource).

[0047] Step 302: The first terminal device selects a destination associated with the sidelink resource in a Logical Channel Prioritization (LCP) procedure.

[0048] Step 303: The first end device sends the sidelink transmission to a second end device corresponding to the selected destination.

[0049] It should be noted that the above FIG. 3 only shows a schematic diagram of an embodiment of the present invention, but the present invention is not limited thereto. For example, the execution order between various steps may be appropriately adjusted, some other steps may be added, and some steps may be removed. Those skilled in the art may make appropriate modifications based on the above content, and are not limited to the description of the above FIG. 3.

[0050] In the embodiments of the present invention, "in the LCP procedure" may be referred to as "in the MAC PDU assembly procedure" or "in the MAC PDU generation procedure" or "in the MAC PDU construction procedure", and unless otherwise specified, in the description of each embodiment below, "in the LCP procedure" may be replaced with "in the MAC PDU assembly procedure" or "in the MAC PDU generation procedure" or "in the MAC PDU construction procedure".

[0051] In the above aspect, since the destination selected in the LCP procedure is the same as the destination considered when the network device allocates the SL grant or the Tx UE autonomously selects the SL grant, the sidelink transmission using the resource indicated by the SL grant is transmitted at the SL DRX active time of the destination corresponding to the SL grant, so that the Rx UE corresponding to the destination can correctly receive the sidelink transmission.

[0052] In the above step 301, in mode-1, the above SL grant is allocated by the network device for the first terminal device, and in mode-2, the above SL grant is autonomously selected by the first terminal device. In the above step 301, "determine" may be expressed as "receive", "select", "acquire", "get", etc., and the present invention is not limited to the manner of expression.

[0053] In the above step 302, in mode-1, in some aspects, the destination associated with the sidelink resource selected by the first terminal device in the LCP procedure may be a destination where a logical channel or MAC CE having sidelink data to be transmitted is located when a SL-BSR is triggered, or a MAC CE of the SL-BSR is generated, or a MAC CE of the SL-BSR is transmitted, or a destination where a logical channel or MAC CE with the highest priority or the smallest packet delay budget (PDB) is located when a SL-BSR is triggered, or a MAC CE of the SL-BSR is generated, or a MAC CE of the SL-BSR is transmitted, or a destination where a logical channel or MAC CE with the highest priority or the smallest PDB is located when a scheduling request (SR) triggered by a sidelink logical channel (SL LCH) or a sidelink MAC CE (SL MAC CE) is triggered or transmitted. This ensures that the destination selected by the first terminal device in the LCP procedure matches the destination that the network device takes into account when allocating an SL grant, so that the receiving device (second terminal device) corresponding to that destination can correctly receive the sidelink transmission.

[0054] Although the above lists destinations associated with sidelink resources with reference to several examples, the present invention is not limited thereto, and the destinations associated with the sidelink resources may be any combination of the several examples above.

[0055] In the above aspects, the first terminal device may transmit information regarding the SL grant active time to a network device, such as a serving base station (e.g., serving gNB) or serving cell of the first terminal device, so that the network device assigns an SL DRX to the first terminal device based on the information regarding the SL grant active time. In some aspects, the information regarding the SL DRX active time includes SL DRX active time information corresponding to a destination or a pair of source ID and destination ID.

[0056] In some aspects, the information regarding the SL DRX active time includes SL DRX active time information corresponding to a destination or source-destination pair in which a logical channel or MAC CE has the highest priority, or a priority higher than a specified value, or a minimum PDB, or a delay requirement lower than a specified value.

[0057] In some aspects, the information regarding the SL DRX active time includes SL DRX active time information corresponding to all destinations or source-destination pairs.

[0058] In the above aspect, the network device may allocate an SL grant to the first terminal device by referring to the above SL DRX active time information, whereby the first terminal device can select a destination associated with the SL grant in an LCP procedure such that a resource indicated by the SL grant allocated by the network device is located within the SL DRX active time of the destination associated with the SL grant, and can ensure that the Rx UE of the destination can receive control information and / or data transmitted in the resource indicated by the SL grant.

[0059] In the above aspect, the SL DRX active time information may be at least one of the timing period of a SL DRX on-duration timer, the timing period of a SL DRX inactivity timer, the timing period of a SL DRX retransmission timer, slots in which SL periodic transmissions exist, slots in which initial transmissions or retransmissions indicated by the SCI exist, and an upper delay limit of a sidelink channel state information report (SL CSI reporting). Note that the present invention is not limited to these, and the SL DRX active time information may be other information related to the SL DRX active time, and a description thereof will be omitted here.

[0060] In the above step 302, in mode-2, in some aspects, the destination associated with the sidelink resource selected by the first terminal device in the LCP procedure may be the destination used by the first terminal device in a resource selection and / or reselection procedure, thereby ensuring that the destination selected by the first terminal device in the LCP procedure matches the destination considered when the first terminal device autonomously selects an SL grant, so that the receiving device (second terminal device) corresponding to the destination can correctly receive the sidelink transmission.

[0061] In some aspects, the first terminal device may use at least one of the destinations of the logical channel or MAC CE with the highest priority or the smallest PDB, the destination of the logical channel or MAC CE with data to be transmitted, and the destination of the second terminal device for which sidelink resource coordination is required, when the resource selection and / or reselection is triggered in the resource selection and / or reselection procedure. Note that the present invention is not limited thereto, and the addressing tree used by the first terminal device when selecting and / or reselecting resources may be other, and the description thereof will be omitted here.

[0062] In the above aspect, when the first terminal device performs resource selection and / or reselection, for example, in step 301, there may be two methods.

[0063] Method 1: The physical layer of the first terminal device selects a sidelink resource subset based on auxiliary information corresponding to a destination used in the resource selection and / or reselection procedure and reports it to the MAC layer, and the MAC layer of the first terminal device selects a sidelink resource from the sidelink resource subset.

[0064] For example, the MAC layer of the first terminal device determines a destination to be used in the resource selection and / or reselection procedure, transmits auxiliary information corresponding to the destination to the physical layer, and the physical layer selects a sidelink resource subset based on the auxiliary information and reports it to the MAC layer, so that the MAC layer of the first terminal device can select the sidelink resource from the sidelink resource subset reported from the physical layer.

[0065] In the above method, the auxiliary information may be SL DRX active time information or sidelink available resources corresponding to the destination. For example, the sidelink available resources may be determined based on a SL DRX configuration corresponding to the destination. The physical layer of the first terminal device may select sidelink resources within the SL DRX active time or sidelink available resources to configure the sidelink resource subset.

[0066] Method 2: The MAC layer of the first terminal device selects sidelink resources based on auxiliary information corresponding to the destination used in the resource selection and / or reselection procedure.

[0067] For example, the MAC layer of the first terminal device determines a destination to be used in the resource selection and / or reselection procedure and selects the sidelink resource from the sidelink resource subset reported by the physical layer based on auxiliary information corresponding to the destination.

[0068] In the above method, the auxiliary information may be SL DRX active time information or sidelink resources corresponding to the destination. For example, the sidelink available resources may be determined based on a SL DRX configuration corresponding to the destination. The MAC layer of the first terminal device may select sidelink resources within the SL DRX active time or sidelink available resources from a sidelink resource subset reported by the physical layer.

[0069] In the above aspect, similarly to the SL DRX active time information in mode-1, the SL DRX active time information in mode-2 may be at least one of the timing period of the SL DRX on-duration timer, the timing period of the SL DRX inactivity timer, the timing period of the SL DRX retransmission timer, the slots in which the SL periodic transmission exists, the slots in which the initial transmission or retransmission indicated by the SCI exists, and the upper delay limit of the sidelink channel state information report (SL CSI reporting). Note that the present invention is not limited to these, and the SL DRX active time information may be other information related to the SL DRX active time, and the description thereof will be omitted here.

[0070] FIG. 4 is a schematic diagram of another scenario in which a transmitter device (Tx UE) and multiple receiver devices (Rx UEs) perform sidelink transmission.

[0071] As shown in Fig. 4, when the network equipment allocates an SL grant to the Tx UE (mode-1) or when the Tx UE autonomously selects an SL grant (mode-2), the destination considered is destination 1, i.e., the destination related to the SL grant is destination 1. The Tx UE selects destination 1 related to the SL grant as a destination in the LCP procedure. Since the destination selected by the Tx UE in the LCP procedure matches the destination considered when the network equipment allocates an SL grant or the Tx UE autonomously selects an SL grant, and both are destination 1, the SL transmission in the SL grant is transmitted in the active time of SL DRX of the destination corresponding to the SL grant. This allows the Rx UE corresponding to the destination to correctly receive the SL transmission.

[0072] In the embodiments of the present invention, there may be a destination that has a logical channel or MAC CE with the highest priority and whose corresponding SL DRX active time does not include the assigned or autonomously selected sidelink resources. For convenience of explanation, such a destination is referred to as a second destination. For example, destination 2 shown in Fig. 4, the following method may be adopted to request resources from this second destination to transmit a corresponding sidelink transmission.

[0073] For example, in mode-1, the first terminal device may trigger an SR or SL-BSR, receive a second sidelink resource allocated by the network device, and use the second sidelink resource to transmit a second sidelink transmission to the second terminal device corresponding to the second destination. Here, the SR may be an SR triggered by the highest priority logical channel or an SR triggered by the highest priority MAC CE, and use an SR configuration corresponding to the highest priority logical channel or MAC CE, and the SL-BSR may be triggered by the highest priority logical channel. In addition, after receiving the above SR or SL-BSR transmitted by the first terminal device, the network device may allocate a sidelink resource (referred to as a second sidelink resource) to the first terminal device by referring to some other information, but the present invention is not limited to a specific allocation method.

[0074] In the above aspect, preferably, the first terminal device may transmit information on the SL DRX active time to the network device, so that the network device allocates the second sidelink resource to the first terminal device with reference to the information on the SL DRX active time. The information on the SL DRX active time includes SL DRX active time information corresponding to a destination or a source-destination pair. The SL DRX active time information has already been described, and therefore the description thereof will be omitted here.

[0075] For example, in mode-2, the first terminal device may trigger resource selection and / or reselection, obtain second sidelink resources, and transmit a second sidelink transmission to a second terminal device corresponding to the second destination using the second sidelink resources. That is, the following circumstances are added for triggering transmission resource selection and / or reselection:

[0076] If the selected sidelink grant is not in the SL DRX active time corresponding to the destination with the highest priority logical channel or MAC CE, or If the selected sidelink grant is out of the SL DRX active time corresponding to the destination with the highest priority logical channel or MAC CE.

[0077] Here, the first terminal device may select a destination associated with the second sidelink resource in a Logical Channel Priority Processing (LCP) procedure. The selected destination is the second destination. The present invention is not limited to a specific selection method and LCP procedure. The LCP procedure has already been described, so the description thereof is omitted here.

[0078] The above-mentioned embodiments are merely illustrative of the present invention, and the present invention is not limited thereto, and appropriate modifications may be made based on the above-mentioned embodiments. For example, each of the above-mentioned embodiments may be used alone, or one or more of the above-mentioned embodiments may be used in combination.

[0079] According to the method of the embodiment of the present invention, by selecting a destination associated with an SL grant in an LCP procedure, a sidelink transmission using resources (SL resources) indicated by the SL grant is sent at the SL DRX active time of the destination corresponding to the SL grant, and an Rx UE corresponding to the destination can correctly receive the sidelink transmission.

[0080] <Example 2> An embodiment of the present invention provides a data transmission method, which is described from the first terminal device side.

[0081] 5 is a schematic diagram of an example of a data transmission method according to an embodiment of the present invention. As shown in FIG. 5, the method includes the following steps:

[0082] Step 501: The first terminal device determines a sidelink resource (SL grant or SL resource).

[0083] Step 502: The first terminal device selects a destination in a logical channel priority processing (LCP) procedure, where the sidelink resource is located within a SL DRX active time corresponding to the destination.

[0084] Step 503: The first terminal device sends the sidelink transmission to a second terminal device corresponding to the selected destination.

[0085] It should be noted that the above FIG. 5 only shows a schematic diagram of an embodiment of the present invention, but the present invention is not limited thereto. For example, the execution order between various steps may be appropriately adjusted, some other steps may be added, and some steps may be removed. Those skilled in the art may make appropriate modifications based on the above content, and are not limited to the description of the above FIG. 5.

[0086] In the above aspect, the first terminal device, when selecting a destination in the LCP procedure, follows a principle that "the SL grant allocated by the network device or the SL grant autonomously selected by the Tx UE is positioned within the active time of the SL DRX corresponding to the selected destination." As a result, sidelink transmission in the SL grant is transmitted in the active time of the SL DRX of the destination corresponding to the SL grant, so that the Rx UE corresponding to the destination can correctly receive the sidelink transmission.

[0087] In the above step 501, in mode-1, the above SL grant is allocated by the network device for the first terminal device, and in mode-2, the above SL grant is autonomously selected by the first terminal device. In the above step 501, "determine" may be expressed as "receive", "select", "acquire", "get", etc., and the present invention is not limited to the manner of expression.

[0088] In the above step 502, in some aspects, the SL DRX active time corresponding to the destination includes the time length of the sidelink resource (or the time domain resource), and the destination has a logical channel or MAC CE with the highest priority that satisfies a predetermined condition. That is, in the LCP procedure, when selecting a destination, the first terminal device needs to satisfy not only the condition that "the destination has a logical channel or MAC CE with the highest priority that satisfies a predetermined condition" but also the condition that "the SL DRX active time corresponding to the destination includes the time length of the sidelink resource".

[0089] For example, the standard may be modified as follows:

[0090] [Table 1] In the above step 502, in some aspects, the destination is a destination having a logical channel or MAC CE with the highest priority that satisfies a predetermined condition, selected from the third destinations, and the SL DRX active time corresponding to the third destination includes the time length of the sidelink resource (or the time domain resource). That is, in the LCP procedure, when selecting a destination, the first terminal device selects a destination where a logical channel or MAC CE with the highest priority that satisfies a predetermined condition is located, from the destinations of the corresponding SL DRX active time including the time length of the SL grant.

[0091] In other words, in the LCP procedure, when selecting a destination, the first terminal device first determines which destination's corresponding SL DRX active time includes the time length of the SL grant (or time domain resource), then determines which of these destinations has the highest priority of a logical channel or MAC CE that satisfies a predetermined condition, and selects the destination having the highest priority logical channel or MAC CE that satisfies the predetermined condition. Alternatively, in the LCP procedure, when selecting a destination, the first terminal device excludes destinations whose corresponding SL DRX active time does not include the time length of the SL grant, and selects from the remaining destinations the destination having the highest priority logical channel or MAC CE that satisfies the predetermined condition.

[0092] For example, the standard may be modified as follows:

[0093] [Table 2] In the above step 502, in some aspects, the destination is a fourth destination having a logical channel or MAC CE with the highest priority that satisfies a predetermined condition. Here, if the SL DRX active time corresponding to the fourth destination includes the time length (or time domain resource) of the sidelink resource, the priority of the logical channel and / or MAC CE included in the fourth destination is increased, i.e., the priority value is decreased. That is, in the LCP procedure, when selecting a destination, if the SL DRX active time corresponding to the destination includes the time length (or time domain resource) of the SL grant, the first terminal device increases the priority of the logical channel of the destination, and selects the destination using an existing method, i.e., selects the destination where the logical channel or MAC CE with the highest priority that satisfies the predetermined condition is located.

[0094] In the above embodiment, the priority of the destination logical channel is increased, e.g., an offset is subtracted from the priority value of the destination logical channel (a higher priority value indicates a lower priority). When the priority of the destination logical channel reaches the highest priority, the priority of the destination logical channel may be set to a negative value or 0, or may remain at the highest priority.

[0095] In the above step 502, in some aspects, the destination is a fifth destination having a logical channel or MAC CE with the highest priority that satisfies a predefined condition, where the SL DRX active time corresponding to the fifth destination includes the time length of the sidelink resource (or time domain resource), and the fifth destination has a high priority.

[0096] That is, in the LCP procedure, when the first terminal device selects a destination, if the SL DRX active time corresponding to the destination includes the resources or time length indicated by the SL grant, the destination is high priority, and from the high priority destinations, the destination where the logical channel or MAC CE with the highest priority that satisfies the specified condition is located is selected as the destination of the generated MAC PDU.

[0097] In the above step 502, in some aspects, the destination is a sixth destination of a logical channel or MAC CE with the highest priority that satisfies a predefined condition, where the SL DRX active time corresponding to the sixth destination does not include the time length of the sidelink resource (or the time domain resource), and the sixth destination has a lower priority.

[0098] That is, in the LCP procedure, when the first terminal device selects a destination, if the SL DRX active time corresponding to the destination does not include the resources or time length indicated by the SL grant, the destination is of low priority, and from the destinations that are not of low priority, the first terminal device selects the destination where the logical channel or MAC CE with the highest priority that satisfies the specified condition is located as the destination of the generated MAC PDU.

[0099] In the above embodiment, the predetermined condition means the condition ">2" in the LCP procedure, and specifically, the wording of the above standard may be referenced.

[0100] FIG. 6 is a schematic diagram of another scenario in which a transmitter device (Tx UE) and multiple receiver devices (Rx UEs) perform sidelink transmission.

[0101] As shown in Fig. 6, regardless of the SL grant (mode-1) allocated for the Tx UE by the network equipment or the SL grant (mode-2) autonomously selected by the Tx UE, the Tx UE selects, in the LCP procedure, destination 1 whose corresponding SL DRX active time includes the time length (or time domain resource) of the SL grant as a destination. Since the SL DRX active time corresponding to the destination selected by the Tx UE in the LCP procedure includes the time length (or time domain resource) of the SL grant allocated by the network equipment or the SL grant autonomously selected by the Tx UE, the SL transmission in the SL grant is transmitted in the SL DRX active time of the destination corresponding to the SL grant. This allows the Rx UE corresponding to the destination to correctly receive the SL transmission.

[0102] In the embodiments of the present invention, there may be a destination that has a logical channel or MAC CE with the highest priority and whose corresponding SL DRX active time does not include the assigned or autonomously selected sidelink resources. For convenience of explanation, such a destination is referred to as a second destination. For example, destination 2 shown in Fig. 6, the following method may be adopted to request resources from this second destination to transmit a corresponding sidelink transmission.

[0103] For example, in mode-1, the first terminal device may trigger an SR or SL-BSR, receive a second sidelink resource allocated by the network device, and use the second sidelink resource to transmit a second sidelink transmission to the second terminal device corresponding to the second destination. Here, the SR may be an SR triggered by the highest priority logical channel or an SR triggered by the highest priority MAC CE, and use an SR configuration corresponding to the highest priority logical channel or MAC CE, and the SL-BSR may be triggered by the highest priority logical channel. In addition, after receiving the above SR or SL-BSR transmitted by the first terminal device, the network device may allocate a sidelink resource (referred to as a second sidelink resource) to the first terminal device by referring to some other information, but the present invention is not limited to a specific allocation method.

[0104] In the above aspect, preferably, the first terminal device may transmit information on the SL DRX active time to the network device, so that the network device allocates the second sidelink resource to the first terminal device with reference to the information on the SL DRX active time. The information on the SL DRX active time includes SL DRX active time information corresponding to a destination or a source-destination pair. The SL DRX active time information has already been described, and therefore the description thereof will be omitted here.

[0105] For example, in mode-2, the first terminal device may trigger resource selection and / or reselection, obtain second sidelink resources, and transmit a second sidelink transmission to a second terminal device corresponding to the second destination using the second sidelink resources. That is, the following circumstances are added for triggering transmission resource selection and / or reselection:

[0106] If the selected sidelink grant is not in the SL DRX active time corresponding to the destination with the highest priority logical channel or MAC CE, or If the selected sidelink grant is out of the SL DRX active time corresponding to the destination with the highest priority logical channel or MAC CE.

[0107] Here, the first terminal device may select a destination associated with the second sidelink resource in a Logical Channel Priority Processing (LCP) procedure. The selected destination is the second destination. The present invention is not limited to a specific selection method and LCP procedure. The LCP procedure has already been described, so the description thereof is omitted here.

[0108] The above-mentioned embodiments are merely illustrative of the present invention, and the present invention is not limited thereto, and appropriate modifications may be made based on the above-mentioned embodiments. For example, each of the above-mentioned embodiments may be used alone, or one or more of the above-mentioned embodiments may be used in combination.

[0109] According to the method of the embodiment of the present invention, the first terminal device selects in the LCP procedure a destination that is assigned to a corresponding SL DRX active time or includes an autonomously selected SL grant, so that the sidelink transmission in the SL grant is transmitted in the SL DRX active time of the destination corresponding to the SL grant, and the Rx UE corresponding to the destination can correctly receive the sidelink transmission.

[0110] <Example 3> An embodiment of the present invention provides a data transmission method, described from the first terminal device side, for a destination (second destination) having a logical channel or MAC CE with the highest priority, in which the SL DRX active time corresponding to the second destination does not include sidelink resources allocated by a network device or autonomously selected by a first transmitting device.

[0111] 7 is a schematic diagram of an example of a data transmission method according to an embodiment of the present invention. As shown in FIG. 7, the method includes the following steps:

[0112] Step 701: The first terminal device triggers an SR or SL-BSR.

[0113] Step 702: The first terminal device receives a second sidelink resource allocated by a network device.

[0114] Step 703: The first terminal device sends a second sidelink transmission to a second terminal device corresponding to the second destination using the second sidelink resource.

[0115] In the above aspect, for the second destination, in mode-1, the first terminal device may trigger SR or SL-BSR, receive second sidelink resources allocated by the network device, and send a second sidelink transmission to a second terminal device corresponding to the second destination using the second sidelink resources.

[0116] Here, the SR may be an SR triggered by the highest priority logical channel or an SR triggered by the highest priority MAC CE, and the SR configuration corresponding to the highest priority logical channel or MAC CE is used, and the SL-BSR may be triggered by the highest priority logical channel. After receiving the above SR or SL-BSR sent by the first terminal device, the network device may allocate sidelink resources (referred to as second sidelink resources) to the first terminal device by referring to some other information, but the present invention is not limited to a specific allocation method.

[0117] In the above aspect, preferably, the first terminal device may transmit information on the SL DRX active time to the network device, so that the network device allocates the second sidelink resource to the first terminal device with reference to the information on the SL DRX active time. The information on the SL DRX active time includes SL DRX active time information corresponding to a destination or a source-destination pair. The SL DRX active time information has already been described, and therefore the description thereof will be omitted here.

[0118] 8 is a schematic diagram of another example of a data transmission method according to an embodiment of the present invention. As shown in FIG. 8, the method includes the following steps:

[0119] Step 801: A first terminal device triggers resource selection and / or reselection to obtain a second sidelink resource.

[0120] Step 802: The first terminal device sends a second sidelink transmission to a second terminal device corresponding to the second destination using the second sidelink resource.

[0121] For example, for the second destination, in mode-2, the first terminal device may trigger resource selection and / or reselection, obtain second sidelink resources, and transmit a second sidelink transmission to the second terminal device corresponding to the second destination using the second sidelink resources. That is, the following circumstances are added for triggering transmission resource selection and / or reselection:

[0122] If the selected sidelink grant is not in the SL DRX active time corresponding to the destination with the highest priority logical channel or MAC CE, or If the selected sidelink grant is out of the SL DRX active time corresponding to the destination with the highest priority logical channel or MAC CE.

[0123] Here, the first terminal device may select a destination associated with the second sidelink resource in a Logical Channel Priority Processing (LCP) procedure. The selected destination is the second destination. The present invention is not limited to a specific selection method and LCP procedure. The LCP procedure has already been described, so the description thereof is omitted here.

[0124] According to an embodiment of the present invention, the Rx UE corresponding to the second destination can receive the sidelink transmission correctly.

[0125] <Example 4> The embodiments of the present invention provide a data transmission method, which will be described from the perspective of a network device. The network device is, for example, a network device in mode-1 according to the first to third embodiments, and is used to allocate sidelink resources to a transmitting device (a first terminal device according to the first to third embodiments) in mode-1. Note that the same description as in the first to third embodiments will be omitted.

[0126] Example 4 may be implemented independently or in combination with Examples 1 to 3. Note that a description of the same contents as Examples 1 to 3 will be omitted.

[0127] 9 is a schematic diagram of an example of a resource scheduling method according to an embodiment of the present invention. As shown in FIG. 9, the method includes the following steps:

[0128] Step 901: A network device receives information about a SL DRX active time sent by a first terminal device, The information about the SL DRX active time includes SL DRX active time information corresponding to a destination or a source-destination pair.

[0129] Step 902: The network device allocates sidelink resources to the first terminal device based on information about the SL DRX active time.

[0130] It should be noted that the above FIG. 9 only shows a schematic diagram of an embodiment of the present invention, but the present invention is not limited thereto. For example, the execution order between various steps may be appropriately adjusted, some other steps may be added, and some steps may be removed. Those skilled in the art may make appropriate modifications based on the above content, and are not limited to the description of the above FIG. 9.

[0131] In some aspects, the information regarding the SL DRX active time includes SL DRX active time information corresponding to a destination or source-destination pair in which a logical channel or MAC CE has the highest priority, or a priority higher than a specified value, or a minimum PDB, or a delay requirement lower than a specified value.

[0132] In some aspects, the information regarding the SL DRX active time includes SL DRX active time information corresponding to all destinations or source-destination pairs.

[0133] In the above aspect, the network device may allocate an SL grant to the first terminal device by referring to the above SL DRX active time information, so that the first terminal device can select a destination associated with the SL grant in an LCP procedure such that a resource indicated by the SL grant allocated by the network device is located within the SL DRX active time of the destination associated with the SL, and can ensure that the Rx UE of the destination can receive control information and / or data transmitted in the resource indicated by the SL grant.

[0134] In the above aspect, the SL DRX active time information is at least one of the timing period of a SL DRX on-duration timer, the timing period of a SL DRX inactivity timer, the timing period of a SL DRX retransmission timer, slots in which an SL periodic transmission exists, slots in which an initial transmission or a retransmission indicated by an SCI exists, and an upper delay limit of a sidelink channel state information report (SL CSI reporting).

[0135] According to the method of the embodiment of the present invention, the sidelink resources in which the sidelink transmission is located can be positioned in the DRX active time of the receiving device, which is advantageous for the receiving device to correctly receive the sidelink transmission transmitted to it, especially in the case of two or more receiving devices.

[0136] <Example 5> An embodiment of the present invention provides a data transmission device.

[0137] 10 is a schematic diagram of an example of a data transmission device according to an embodiment of the present invention. The device may be, for example, a terminal device (for example, the above-mentioned first terminal device), or one or more components configured in the terminal device. Descriptions of contents similar to those in the first embodiment will be omitted.

[0138] As shown in FIG. 10, a data transmitting device 1000 includes a determining unit 1001, a first selecting unit 1002, and a first transmitting unit 1003.

[0139] In an embodiment of the present invention, a determining unit 1001 determines a sidelink resource, a first selecting unit 1002 selects a destination associated with the sidelink resource in a Logical Channel Prioritization (LCP) procedure, and a first transmitting unit 1003 transmits the sidelink transmission to the second terminal device corresponding to the selected destination.

[0140] In some aspects, in mode-1, the destinations associated with the sidelink resource are at least one of: a destination for which a logical channel or MAC CE having sidelink data to be transmitted is located when a Sidelink Buffer Status Report (SL-BSR) is triggered or a Medium Access Control Layer Control Element (MAC CE) for a SL-BSR is generated or a MAC CE for a SL-BSR is transmitted; a destination for which a logical channel or MAC CE with the highest priority or the smallest Packet Delay Budget (PDB) is located when a SL-BSR is triggered or a MAC CE for a SL-BSR is generated or a MAC CE for a SL-BSR is transmitted; and a destination for which a logical channel or MAC CE with the highest priority or the smallest PDB is located when a Scheduling Request (SR) triggered by a Sidelink Logical Channel (SL LCH) or a Sidelink MAC CE is triggered or transmitted.

[0141] In the above aspect, as shown in FIG. 10, the data transmitting device 1000 further includes the following units.

[0142] The second sending unit 1004 sends information about the SL DRX active time to the network device, the information about the SL DRX active time including SL DRX active time information corresponding to a destination or a source-destination pair (a pair of source ID and destination ID).

[0143] In some aspects, the information regarding the SL DRX active time includes SL DRX active time information corresponding to a destination or source-destination pair in which a logical channel or MAC CE has the highest priority, or a priority higher than a specified value, or a minimum PDB, or a delay requirement lower than a specified value.

[0144] In some aspects, the information regarding the SL DRX active time includes SL DRX active time information corresponding to all destinations or source-destination pairs.

[0145] In the above aspect, the SL DRX active time information is at least one of the timing period of a SL DRX on-duration timer, the timing period of a SL DRX inactivity timer, the timing period of a SL DRX retransmission timer, slots in which an SL periodic transmission exists, slots in which an initial transmission or a retransmission indicated by an SCI exists, and an upper delay limit of a sidelink channel state information report (SL CSI reporting).

[0146] In some aspects, in mode-2, the destination associated with the sidelink resource is the destination used by the first terminal device in a resource selection and / or reselection procedure.

[0147] In the above aspect, in a resource selection and / or reselection procedure, when resource selection and / or reselection is triggered, the first terminal device uses at least one of the destinations where the logical channel or MAC CE with the highest priority or the smallest PDB is located, the destination where the logical channel or MAC CE with data to be transmitted is located, and the destination of the second terminal device for which sidelink resource coordination is required.

[0148] In some aspects, as shown in FIG. 10, the data transmission device 1000 further includes the following units:

[0149] The second selection unit 1005 determines a destination to be used in a resource selection and / or reselection procedure in the MAC layer of the first terminal device, transmits auxiliary information corresponding to the destination to the physical layer, selects a sidelink resource subset based on the auxiliary information in the physical layer of the first terminal device and reports it to the MAC layer, and selects the sidelink resource from the sidelink resource subset in the MAC layer of the first terminal device.

[0150] In the above aspect, the auxiliary information is SL DRX active time information or sidelink available resources corresponding to the destination. A second selection unit 1005 selects sidelink resources within the SL DRX active time or the sidelink available resources in the physical layer of the first terminal device to configure the sidelink resource subset.

[0151] In some aspects, as shown in FIG. 10, the data transmission device 1000 further includes the following units:

[0152] The third selection unit 1006 determines a destination to be used in the resource selection and / or reselection procedure in the MAC layer of the first terminal device, and selects the sidelink resource from the sidelink resource subset reported by the physical layer based on auxiliary information corresponding to the destination.

[0153] In the above aspect, the auxiliary information is SL DRX active time information or sidelink resources corresponding to the destination. A third selection unit 1006 selects, in the MAC layer of the first terminal device, a sidelink resource within the SL DRX active time or sidelink resource available from the sidelink resource subset.

[0154] In an embodiment of the present invention, the SL DRX active time information is at least one of the timing period of a SL DRX on-duration timer, the timing period of a SL DRX inactivity timer, the timing period of a SL DRX retransmission timer, slots in which an SL periodic transmission exists, slots in which an initial transmission or a retransmission indicated by an SCI exists, and an upper delay limit of a sidelink channel state information report (SL CSI reporting).

[0155] In some aspects, in mode-1, when there is a second destination having a logical channel or MAC CE with the highest priority and the sidelink resource is not included in the SL DRX active time corresponding to the second destination, as shown in FIG. 10, the data transmitting device 1000 further includes the following units.

[0156] The first trigger unit 1007 triggers the SR or the SL-BSR.

[0157] The receiving unit 1008 receives the second sidelink resource allocated by the network device.

[0158] The third transmitting unit 1009 transmits a second sidelink transmission to a second terminal device corresponding to the second destination using the second sidelink resource.

[0159] In the above aspect, preferably, as shown in FIG. 10, the data transmitting device 1000 further includes the following units.

[0160] A fourth sending unit 1010 sends information about the SL DRX active time to the network device, the information about the SL DRX active time including SL DRX active time information corresponding to a destination or a source-destination pair.

[0161] In some aspects, in mode-2, when there is a second destination having a logical channel or MAC CE with the highest priority and the sidelink resource is not included in the SL DRX active time corresponding to the second destination, the data transmitting device 1000 further includes the following units.

[0162] A second trigger unit 1011 triggers resource selection and / or reselection to obtain a second sidelink resource.

[0163] The fifth transmitting unit 1012 transmits a second sidelink transmission to a second terminal device corresponding to the second destination using the second sidelink resource.

[0164] In the above aspect, preferably, as shown in FIG. 10, the data transmitting device 1000 further includes the following units.

[0165] A fourth selection unit 1013 selects a destination associated with the second sidelink resource in a Logical Channel Priority Processing (LCP) procedure, where the selected destination is the second destination.

[0166] Although only the components or modules related to the present invention have been described above, the present invention is not limited thereto. The data transmission device 1000 may further include other components or modules. For specific contents of these components or modules, reference may be made to related art.

[0167] Furthermore, for convenience of explanation, Fig. 10 only exemplarily illustrates the connection relationships or signal directions between various components or modules, but it is clear to those skilled in the art that various related technologies such as bus connections can be used. The above-mentioned various components or modules may be implemented by hardware devices such as a processor, a memory, a transmitter, and a receiver, and the present invention is not limited thereto.

[0168] According to the data transmitting device of the embodiment of the present invention, the sidelink resource in which the sidelink transmission is located can be positioned during the DRX active time of the receiving device, which is advantageous for the receiving device to correctly receive the sidelink transmission transmitted to it, particularly in the case of two or more receiving devices.

[0169] <Example 6> An embodiment of the present invention provides a data transmission device.

[0170] 11 is a schematic diagram of an example of a data transmission device according to an embodiment of the present invention. The device may be, for example, a terminal device (for example, the above-mentioned first terminal device), or may be one or more components configured in the terminal device. Descriptions of contents similar to those in the second embodiment are omitted.

[0171] As shown in FIG. 11, a data transmitting device 1100 includes a determining unit 1101, a first selecting unit 1102, and a first transmitting unit 1103.

[0172] In an embodiment of the present invention, a determining unit 1101 determines a sidelink resource. A first selecting unit 1102 selects a destination in a logical channel priority processing (LCP) procedure, where the sidelink resource is located within a SL DRX active time corresponding to the destination. A first transmitting unit 1103 transmits the sidelink transmission to the second terminal device corresponding to the selected destination.

[0173] In some aspects, the SL DRX active time corresponding to the destination includes the time length (or time domain resource) of the sidelink resource, the destination having the logical channel or MAC CE with the highest priority that satisfies a predefined condition.

[0174] In some aspects, the destination is a destination selected from a third destination having a logical channel or MAC CE with the highest priority that satisfies a predefined condition, and the SL DRX active time corresponding to the third destination includes the time length (or time domain resource) of the sidelink resource.

[0175] In some aspects, the destination is a fourth destination having a logical channel or MAC CE with the highest priority that satisfies a predefined condition, where if the SL DRX active time corresponding to the fourth destination includes the time length of the sidelink resource (or time domain resource), the priority of the logical channel and / or MAC CE included in the fourth destination is increased.

[0176] In some aspects, the destination is a fifth destination having a logical channel or MAC CE with the highest priority that satisfies a predefined condition, where the SL DRX active time corresponding to the fifth destination includes the time length of the sidelink resource (or time domain resource), and the fifth destination has a high priority.

[0177] In some aspects, the destination is a sixth destination having a logical channel or MAC CE with the highest priority that satisfies a predefined condition, where the SL DRX active time corresponding to the sixth destination does not include the time length of the sidelink resource (or time domain resource), and the sixth destination has a lower priority.

[0178] In some aspects, in mode-1, when there is a second destination having a logical channel or MAC CE with the highest priority and the sidelink resource is not included in the SL DRX active time corresponding to the second destination, as shown in FIG. 11, the data transmitting device 1100 further includes the following units:

[0179] The first trigger unit 1104 triggers the SR or the SL-BSR.

[0180] The receiving unit 1105 receives a second sidelink resource allocated by the network device.

[0181] The second transmitting unit 1106 transmits a second sidelink transmission to a second terminal device corresponding to the second destination using the second sidelink resource.

[0182] In the above aspect, as shown in FIG. 11, the data transmitting device 1100 further includes the following units.

[0183] The third sending unit 1107 sends information about the SL DRX active time to the network device, where the information about the SL DRX active time includes SL DRX active time information corresponding to a destination or a source-destination pair.

[0184] In some aspects, in mode-2, when there is a second destination having a logical channel or MAC CE with the highest priority and the sidelink resource is not included in the SL DRX active time corresponding to the second destination, as shown in FIG. 11, the data transmitting device 1100 further includes the following units:

[0185] A second trigger unit 1108 triggers resource selection and / or reselection to obtain the second sidelink resource.

[0186] The fourth transmitting unit 1109 transmits a second sidelink transmission to a second terminal device corresponding to the second destination using the second sidelink resource.

[0187] In the above aspect, as shown in FIG. 11, the data transmitting device 1100 further includes the following units.

[0188] A second selection unit 1110 selects a destination associated with the second sidelink resource in a Logical Channel Priority Processing (LCP) procedure, where the selected destination is the second destination.

[0189] Although only the components or modules related to the present invention have been described above, the present invention is not limited thereto. The data transmission device 1100 may further include other components or modules. For specific contents of these components or modules, reference may be made to the related art.

[0190] Furthermore, for convenience of explanation, Fig. 11 only exemplarily illustrates the connection relationships or signal directions between various components or modules, but it is clear to those skilled in the art that various related technologies such as bus connections can be used. The above-mentioned various components or modules may be implemented by hardware devices such as a processor, a memory, a transmitter, and a receiver, and the present invention is not limited thereto.

[0191] According to the data transmitting device of the embodiment of the present invention, the sidelink resource in which the sidelink transmission is located can be positioned during the DRX active time of the receiving device, which is advantageous for the receiving device to correctly receive the sidelink transmission transmitted to it, particularly in the case of two or more receiving devices.

[0192] <Example 7> An embodiment of the present invention provides a data transmission device. The device may be, for example, a terminal device (for example, the above-mentioned first terminal device), or one or more components configured in the terminal device. The description of the same contents as those in the third embodiment will be omitted. The device targets a destination (second destination) of a logical channel or MAC CE having the highest priority, and the SL DRX active time corresponding to the second destination does not include sidelink resources allocated by a network device or autonomously selected by the first transmission device.

[0193] 12 is a schematic diagram of an example of a data transmission device according to an embodiment of the present invention. As shown in FIG. 12, a data transmission device 1200 includes a trigger unit 1201, a receiving unit 1202, and a first transmitting unit 1203.

[0194] The triggering unit 1201 triggers an SR or an SL-BSR. The receiving unit 1202 receives a second sidelink resource allocated by a network device. The first transmitting unit 1203 transmits a second sidelink transmission to a second terminal device corresponding to the second destination using the second sidelink resource.

[0195] In some aspects, as shown in FIG. 12, the data transmission device 1200 further includes the following units:

[0196] The second sending unit 1204 sends information about the SL DRX active time to the network device, where the information about the SL DRX active time includes SL DRX active time information corresponding to a destination or a source-destination pair.

[0197] 13 is a schematic diagram of another example of a data transmission device according to an embodiment of the present invention. As shown in FIG. 13, a data transmission device 1300 includes a trigger unit 1301 and a transmission unit 1302.

[0198] The triggering unit 1301 triggers resource selection and / or reselection to obtain a second sidelink resource. The transmitting unit 1302 transmits a second sidelink transmission to a second terminal device corresponding to the second destination using the second sidelink resource.

[0199] In some aspects, as shown in FIG. 13, the data transmission device 1300 further includes the following units:

[0200] A selection unit 1303 selects a destination associated with the second sidelink resource in a Logical Channel Priority Processing (LCP) procedure, where the selected destination is the second destination.

[0201] According to an embodiment of the present invention, the Rx UE corresponding to the second destination can receive the sidelink transmission correctly.

[0202] <Example 8> An embodiment of the present invention provides a resource scheduling device.

[0203] 14 is a schematic diagram of an example of a resource scheduling device according to an embodiment of the present invention. The device may be, for example, a network device, or one or more components configured in the network device. The description of the same contents as those in the fourth embodiment will be omitted.

[0204] As shown in FIG. 14, the resource scheduling device 1400 includes a receiving unit 1401 and an allocating unit 1402 .

[0205] In an embodiment of the present invention, the receiving unit 1401 receives information about the SL DRX active time sent by a first terminal device, the information about the SL DRX active time includes SL DRX active time information corresponding to a destination or a source-destination pair, and the allocating unit 1402 allocates sidelink resources to the first terminal device based on the information about the SL DRX active time.

[0206] In some aspects, the information regarding the SL DRX active time includes SL DRX active time information corresponding to a destination or source-destination pair in which a logical channel or MAC CE has the highest priority, or a priority higher than a specified value, or a minimum PDB, or a delay requirement lower than a specified value.

[0207] In some aspects, the information regarding the SL DRX active time includes SL DRX active time information corresponding to all destinations or source-destination pairs.

[0208] In the above aspect, the SL DRX active time information is at least one of the timing period of a SL DRX on-duration timer, the timing period of a SL DRX inactivity timer, the timing period of a SL DRX retransmission timer, slots in which an SL periodic transmission exists, slots in which an initial transmission or a retransmission indicated by an SCI exists, and an upper delay limit of a sidelink channel state information report (SL CSI reporting).

[0209] According to the resource scheduling device of the embodiment of the present invention, the sidelink resource in which the sidelink transmission is located can be positioned at the DRX active time of the receiving device, which is advantageous for the receiving device to correctly receive the sidelink transmission transmitted to it, especially in the case of two or more receiving devices.

[0210] <Example 9> The embodiment of the present invention further provides a communication system, and the description of the same contents as those of the first to eighth embodiments will be omitted.

[0211] In some aspects, a communication system may include a first terminal device and a second terminal device. The first terminal device and the second terminal device perform sidelink transmission, and the second terminal device uses SL DRX. Here, in mode-2, the first terminal device is configured to implement the method described in Example 1, Example 2, or Example 3 as a transmitting device. The second terminal device is configured to receive the sidelink transmission transmitted by the first terminal device at the SL DRX active time as a receiving device.

[0212] In some aspects, a communication system may include a first terminal device, a second terminal device, and a network device. The first terminal device and the second terminal device perform sidelink transmission, and the second terminal device uses SL DRX. Here, in mode-1, the first terminal device is configured to implement the method described in Example 1, Example 2, or Example 3 as a transmitting device. The second terminal device is configured to receive the sidelink transmission transmitted by the first terminal device at the SL DRX active time as a receiving device. The network device is configured to allocate sidelink resources to the first terminal device.

[0213] An embodiment of the present invention further provides a terminal device.

[0214] Fig. 15 is a schematic diagram of an example of a terminal device according to an embodiment of the present invention. As shown in Fig. 15, the terminal device 1500 may include a processor 1501 and a memory 1502, where the memory 1502 stores data and programs and is connected to the processor 1501. It should be noted that this figure is illustrative, and other types of structures may be used to supplement or replace this structure to realize communication functions or other functions.

[0215] For example, the processor 1501 may execute a program to realize the method described in the first, second, or third embodiment.

[0216] As shown in Fig. 15, the terminal device 1500 may further include a communication module 1503, an input unit 1504, a display 1505, a power supply 1506, and the like. Here, the functions of the above units are similar to those of the prior art, and the description thereof will be omitted here. It is not necessary for the terminal device 1500 to include all the units shown in Fig. 15. In addition, the terminal device 1500 may further include units not shown in Fig. 15, and may refer to the prior art.

[0217] An embodiment of the present invention further provides a network device.

[0218] Fig. 16 is a schematic diagram of an example of a network device according to an embodiment of the present invention. As shown in Fig. 16, the network device 1600 may include a processor (e.g., a central processing unit (CPU)) 1601 and a memory 1602, and the memory 1602 is connected to the processor 1601. The memory 1602 may store various data, and may further store an information processing program and execute the program under the control of the processor 1601.

[0219] For example, the processor 1601 may execute a program to implement the method described in the fourth embodiment.

[0220] Also, as shown in Fig. 16, the network device 1600 may further include a transceiver 1603 and an antenna 1604. The functions of the above members are similar to those of the prior art, and the description thereof will be omitted here. It is not necessary for the network device 1600 to include all the units shown in Fig. 16. Also, the network device 1600 may further include units not shown in Fig. 16, and may refer to the prior art.

[0221] In an embodiment of the present invention, there is further provided a computer-readable program, which, when executed in a terminal device, causes the terminal device to execute the method described in embodiment 1, embodiment 2, or embodiment 3.

[0222] An embodiment of the present invention further provides a storage medium having a computer-readable program stored therein, the program causing a terminal device to execute a method as described in embodiment 1, embodiment 2, or embodiment 3 when the program is executed.

[0223] In an embodiment of the present invention, there is further provided a computer readable program, which, when executed in a network device, causes the network device to perform the method according to embodiment 4.

[0224] An embodiment of the present invention further provides a storage medium having a computer-readable program stored thereon, the program, when executed, causing a network device to perform the method described in embodiment 4.

[0225] The above-mentioned apparatus and method of the present invention may be realized by hardware or by a combination of hardware and software.The present invention relates to a computer readable program which, when executed by a logic unit, causes the logic unit to realize the above-mentioned apparatus or components, or to realize the above-mentioned various methods or steps.The present invention relates to a storage medium for storing the above-mentioned program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, etc.

[0226] Each processing method in each device described with reference to the embodiments of the present invention may be implemented by hardware, a software module executed by a processor, or a combination of both. For example, one or more of the functional block diagrams shown in the drawings, or one or more combinations of the functional block diagrams, may correspond to each software module in a computer program flow, or each hardware module. These software modules may correspond to each step shown in the drawings. These hardware modules may be realized by implementing these software modules in hardware, for example, using a field programmable gate array (FPGA).

[0227] The software module may be located in a RAM memory, a flash memory, a ROM memory, an EPROM memory, an EEPROM memory, a register, a hard disk, a mobile hard disk, a CD-ROM, or any other form of storage medium known to those skilled in the art. The storage medium may be connected to the processor so that the processor reads information from the storage medium or writes information to the storage medium, or the storage medium may be a component of the processor. The processor and the storage medium may be located in an ASIC. The software module may be stored in the memory of the mobile terminal, or in a memory card inserted in the mobile terminal. For example, if the device (e.g., a mobile terminal) uses a MEGA-SIM card or a large capacity flash memory device with a relatively large capacity, the software module may be stored in the MEGA-SIM card or the large capacity flash memory device.

[0228] One or more of the functional blocks and / or one or more combinations of functional blocks in the functional block diagrams illustrated in the drawings may be implemented with a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or any suitable combination thereof to perform the functions described herein. One or more of the functional blocks and / or one or more combinations of functional blocks in the functional block diagrams illustrated in the drawings may be implemented with, for example, a combination of computing devices, such as a combination of a DSP and a microprocessor, a combination of multiple microprocessors, one or more microprocessors in combination with a DSP communication, or any other configuration.

[0229] Although the present invention has been described above with reference to specific embodiments, the above description is merely illustrative and does not limit the scope of protection of the present invention. Various modifications and changes may be made to the present invention without departing from the spirit and principles of the present invention, and these modifications and changes are also within the scope of the present invention.

[0230] Furthermore, the following supplementary notes are disclosed regarding the embodiments including the above examples. (Appendix 1) A data transmission method applied to a first terminal device, the first terminal device and a second terminal device performing sidelink transmission, the second terminal device using sidelink discontinuous reception (SL DRX), the method comprising: determining sidelink resources by the first terminal device; selecting a destination associated with said sidelink resource in a Logical Channel Prioritization (LCP) procedure; and transmitting the sidelink transmission to the second terminal device corresponding to the selected destination. (Appendix 2) The destination associated with the sidelink resource is If a Sidelink Buffer Status Report (SL-BSR) has been triggered or a Medium Access Control Layer Control Element (MAC CE) of the SL-BSR has been generated or a MAC CE of the SL-BSR has been sent, the destination where the logical channel or MAC CE with sidelink data to be sent is located; If a SL-BSR is triggered or a MAC CE of the SL-BSR is generated or transmitted, the destination on which the logical channel or MAC CE with the highest priority or the smallest Packet Delay Budget (PDB) resides, and The method according to claim 1, wherein when a scheduling request (SR) triggered by a sidelink logical channel (SL LCH) or a sidelink MAC CE is triggered or transmitted, the destination is at least one of the destinations in which the logical channel or MAC CE with the highest priority or the smallest PDB is located. (Appendix 3) The method of claim 1 or 2, further comprising a step of the first terminal device sending information regarding SL DRX active time to a network device, the information regarding SL DRX active time including SL DRX active time information corresponding to a destination or a source-destination pair (a pair of source ID and destination ID). (Appendix 4) The method described in Supplementary Note 3, wherein the information regarding the SL DRX active time includes SL DRX active time information corresponding to a destination or source-destination pair in which a logical channel or MAC CE having the highest priority or a priority higher than a specific value, or the smallest PDB or a delay requirement lower than a specific value, is located. (Appendix 5) The method described in Supplementary Note 3, wherein the information regarding the SL DRX active time includes SL DRX active time information corresponding to all destinations or source-destination pairs. (Appendix 6) The SL DRX active time information is SL DRX on-duration timer count period, SL DRX inactivity timer count period, The period of the SL DRX retransmission timer, Slot in which SL periodic transmission occurs, The slot in which the initial transmission or retransmission, as indicated by the SCI, occurs, and 6. The method according to any one of Supplementary Notes 3 to 5, wherein the upper delay limit for sidelink channel state information reporting (SL CSI reporting) is at least one of the following: (Appendix 7) The method of claim 1, wherein the destination associated with the sidelink resource is a destination used by the first terminal device in a resource selection and / or reselection procedure. (Appendix 8) The first terminal device, in a resource selection and / or reselection procedure, If resource selection and / or reselection is triggered, the destination on which the logical channel or MAC CE resides with the highest priority or the smallest PDB; The destination where the logical channel or MAC CE that has data to send is located, and The method of claim 7, using at least one destination of a second terminal device for which sidelink resource coordination is required. (Appendix 9) a MAC layer of the first terminal device determining a destination to be used in a resource selection and / or reselection procedure and transmitting auxiliary information corresponding to the destination to a physical layer; A step in which a physical layer of the first terminal device selects a sidelink resource subset based on the auxiliary information and reports the selected subset to a MAC layer; The method of claim 7, further comprising: a MAC layer of a first terminal device selecting the sidelink resource from the sidelink resource subset. (Appendix 10) 10. The method of claim 9, wherein the auxiliary information is SL DRX active time information or sidelink available resources corresponding to the destination, and the physical layer of the first terminal device selects sidelink resources within the SL DRX active time or sidelink available resources to configure the sidelink resource subset. (Appendix 11) 8. The method of claim 7, further comprising the step of: a MAC layer of the first terminal device determining a destination to be used in a resource selection and / or reselection procedure and selecting the sidelink resource from a sidelink resource subset reported by a physical layer based on auxiliary information corresponding to the destination. (Appendix 12) 12. The method of claim 11, wherein the auxiliary information is SL DRX active time information or sidelink resources corresponding to the destination, and the MAC layer of the first terminal device selects sidelink resources within the SL DRX active time or sidelink available resources from the sidelink resource subset. (Appendix 13) The SL DRX active time information is SL DRX on-duration timer count period, SL DRX inactivity timer count period, The period of the SL DRX retransmission timer, Slot in which SL periodic transmission occurs, The slot in which the initial transmission or retransmission, as indicated by the SCI, occurs, and 13. The method of claim 10 or 12, wherein the upper delay limit for sidelink channel state information reporting (SL CSI reporting) is at least one of the upper delay limits. (Appendix 14) If there is a second destination having a logical channel or MAC CE with the highest priority and the sidelink resource is not included in the SL DRX active time corresponding to the second destination, the method further comprises: The first terminal device triggers an SR or an SL-BSR; receiving, by the first terminal device, second sidelink resources allocated by a network device; 2. The method of claim 1, further comprising: the first terminal device transmitting a second sidelink transmission to a second terminal device corresponding to the second destination using the second sidelink resources. (Appendix 15) The method of claim 14, further comprising a step of a first terminal device sending information regarding a SL DRX active time to the network device, the information regarding the SL DRX active time including SL DRX active time information corresponding to a destination or a source-destination pair. (Appendix 16) If there is a second destination having a logical channel or MAC CE with the highest priority and the sidelink resource is not included in the SL DRX active time corresponding to the second destination, the method further comprises: the first terminal device triggering resource selection and / or reselection to obtain second sidelink resources; 2. The method of claim 1, further comprising: the first terminal device transmitting a second sidelink transmission to a second terminal device corresponding to the second destination using the second sidelink resources. (Appendix 17) 17. The method of claim 16, further comprising a step of: a first terminal device selecting a destination associated with the second sidelink resource in a Logical Channel Priority Processing (LCP) procedure, the selected destination being the second destination. (Appendix 18) A data transmission method applied to a first terminal device, the first terminal device and a second terminal device performing sidelink transmission, the second terminal device using sidelink discontinuous reception (SL DRX), the method comprising: determining sidelink resources by the first terminal device; the first terminal device selecting a destination in a Logical Channel Priority Processing (LCP) procedure, the sidelink resources being located within a SL DRX active time corresponding to the destination; and a step of the first terminal device transmitting the sidelink transmission to the second terminal device corresponding to the selected destination. (Appendix 19) 19. The method of claim 18, wherein the SL DRX active time corresponding to the destination comprises a time length of the sidelink resource, the destination having a logical channel or MAC CE with the highest priority satisfying a predefined condition. (Appendix 20) 19. The method of claim 18, wherein the destination is a destination having a logical channel or MAC CE with the highest priority that satisfies a predetermined condition, selected from a third destination, and the SL DRX active time corresponding to the third destination includes a time length of the sidelink resource. (Appendix 21) 19. The method of claim 18, wherein the destination is a fourth destination having a logical channel or MAC CE with the highest priority satisfying a predetermined condition, and if the SL DRX active time corresponding to the fourth destination includes the time length of the sidelink resource, the priority of the logical channel and / or MAC CE included in the fourth destination is increased. (Appendix 22) If there is a second destination having a logical channel or MAC CE with the highest priority and the sidelink resource is not included in the SL DRX active time corresponding to the second destination, the method further comprises: The first terminal device triggers an SR or an SL-BSR; receiving, by the first terminal device, second sidelink resources allocated by a network device; 19. The method of claim 18, further comprising: the first terminal device transmitting a second sidelink transmission to a second terminal device corresponding to the second destination using the second sidelink resources. (Appendix 23) The method of claim 22, further comprising a step of a first terminal device sending information regarding a SL DRX active time to the network device, the information regarding the SL DRX active time including SL DRX active time information corresponding to a destination or a source-destination pair. (Appendix 24) If there is a second destination having a logical channel or MAC CE with the highest priority and the sidelink resource is not included in the SL DRX active time corresponding to the second destination, the method further comprises: the first terminal device triggering resource selection and / or reselection to obtain second sidelink resources; 19. The method of claim 18, further comprising: the first terminal device transmitting a second sidelink transmission to a second terminal device corresponding to the second destination using the second sidelink resources. (Appendix 25) The method of claim 24, further comprising a step of: a first terminal device selecting a destination associated with the second sidelink resource in a Logical Channel Priority Processing (LCP) procedure, the selected destination being the second destination. (Appendix 26) A data transmission method applied to a first terminal device, the first terminal device and a second terminal device performing sidelink transmission, the second terminal device using sidelink discontinuous reception (SL DRX), the method comprising: If there is a second destination with the highest priority logical channel or MAC CE and the SL DRX active time corresponding to the second destination does not include the sidelink resources, The first terminal device triggers an SR or an SL-BSR; receiving, by the first terminal device, second sidelink resources allocated by a network device; and a step of the first terminal device transmitting a second sidelink transmission to a second terminal device corresponding to the second destination using the second sidelink resources. (Appendix 27) The method of claim 26, further comprising a step of a first terminal device sending information regarding SL DRX active time to the network device, the information regarding SL DRX active time including SL DRX active time information corresponding to a destination or a source-destination pair. (Appendix 28) A data transmission method applied to a first terminal device, the first terminal device and a second terminal device performing sidelink transmission, the second terminal device using sidelink discontinuous reception (SL DRX), the method comprising: If there is a second destination with the highest priority logical channel or MAC CE and the SL DRX active time corresponding to the second destination does not include the sidelink resources, the first terminal device triggering resource selection and / or reselection to obtain second sidelink resources; and a step of the first terminal device transmitting a second sidelink transmission to a second terminal device corresponding to the second destination using the second sidelink resources. (Appendix 29) 29. The method of claim 28, further comprising a step of: a first terminal device selecting a destination associated with the second sidelink resource in a Logical Channel Priority Processing (LCP) procedure, the selected destination being the second destination. (Appendix 30) A resource scheduling method applied to a network device, the network device allocating sidelink resources to a first terminal device, the method comprising: The network device receives information about a SL DRX active time sent by the first terminal device, the information about the SL DRX active time including SL DRX active time information corresponding to a destination or a source-destination pair; and a step of the network device allocating sidelink resources to the first terminal device based on information regarding the SL DRX active time. (Appendix 31) The method of claim 30, wherein the information regarding the SL DRX active time includes SL DRX active time information corresponding to a destination or source-destination pair in which a logical channel or MAC CE having the highest priority or a priority higher than a specific value, or the smallest PDB or a delay requirement lower than a specific value, is located. (Appendix 32) 31. The method of claim 30, wherein the information about the SL DRX active time includes SL DRX active time information corresponding to all destinations or source-destination pairs. (Appendix 33) The SL DRX active time information is SL DRX on-duration timer count period, SL DRX inactivity timer count period, The period of the SL DRX retransmission timer, Slot in which SL periodic transmission occurs, The slot in which the initial transmission or retransmission, as indicated by the SCI, occurs, and 33. The method of any of claims 30 to 32, wherein the upper delay limit for sidelink channel state information reporting (SL CSI reporting) is at least one of the following: (Appendix 34) A terminal device including a memory in which a computer program is stored and a processor, the processor being configured to execute the computer program to realize a method according to any one of claims 1 to 29. (Appendix 35) A network device comprising: a memory having a computer program stored therein; and a processor, the processor being configured to execute the computer program to implement a method according to any one of claims 30 to 33. (Appendix 36) A communication system including a first terminal device and a second terminal device, the first terminal device and the second terminal device performing sidelink transmission, the second terminal device using sidelink discontinuous reception (SL DRX), The first terminal device determines sidelink resources, selects a destination associated with the sidelink resources in a Logical Channel Prioritization (LCP) procedure, and transmits the sidelink transmission to the second terminal device corresponding to the selected destination; A communication system, wherein the second terminal device receives the sidelink transmission. (Appendix 37) A communication system including a first terminal device and a second terminal device, the first terminal device and the second terminal device performing sidelink transmission, the second terminal device using sidelink discontinuous reception (SL DRX), The first terminal device determines sidelink resources, selects a destination in a logical channel priority processing (LCP) procedure, and transmits the sidelink transmission to the second terminal device corresponding to the selected destination, the sidelink resources being located within a SL DRX active time corresponding to the destination; A communication system, wherein the second terminal device receives the sidelink transmission. (Appendix 38) A communication system including a first terminal device, a second terminal device, and a network device, the first terminal device and the second terminal device performing sidelink transmission, the second terminal device using sidelink discontinuous reception (SL DRX), The network device receives information regarding a SL DRX active time sent by the first terminal device, and allocates sidelink resources to the first terminal device based on the information regarding the SL DRX active time, where the information regarding the SL DRX active time includes SL DRX active time information corresponding to a destination or a source-destination pair; A communication system, wherein the first terminal device transmits a sidelink transmission to the second terminal device using the sidelink resources.

Claims

1. A data transmission device configured in a first terminal device, the first terminal device and a second terminal device performing sidelink transmission, and the second terminal device performing sidelink discontinuous reception (SL DRX), the data transmission device including a processor and a transmitter; The processor, Determine side-link resources, selecting a destination associated with said sidelink resource in a Logical Channel Prioritization (LCP) procedure; determining, at a MAC layer of the first terminal device, a destination to be used in a resource selection and / or reselection procedure; notifying a physical layer of the first terminal device of auxiliary information corresponding to the destination; Selecting a sidelink resource subset based on the auxiliary information in the physical layer of the first terminal device and reporting the selected subset to the MAC layer; selecting the sidelink resource from the sidelink resource subset in the MAC layer of the first terminal device; 4. A data transmission apparatus comprising: a data transmission device configured to transmit a sidelink transmission to the second terminal device corresponding to a selected destination, the sidelink transmission being located within an SL DRX active time corresponding to the destination.

2. The destination associated with the sidelink resource is if a Sidelink Buffer Status Report (SL-BSR) has been triggered or a Medium Access Control Layer Control Element (MAC CE) for the SL-BSR has been generated or a MAC CE for the SL-BSR has been sent, the destination where the logical channel or MAC CE with sidelink data to be sent is located, If the SL-BSR is triggered or the MAC CE of the SL-BSR is generated or transmitted, the destination where the logical channel or MAC CE with the highest priority or smallest Packet Delay Budget (PDB) is located, and 2. The data transmission device of claim 1, wherein when a sidelink logical channel (SL LCH) or a sidelink MAC CE triggered Scheduling Request (SR) is triggered or transmitted, the destination is at least one of the destinations where the logical channel or MAC CE with the highest priority or the smallest PDB is located.

3. 2. The data transmission device according to claim 1, wherein the transmitter transmits information about a SL DRX active time to a network device, and the information about the SL DRX active time includes SL DRX active time information corresponding to a destination or a source-destination pair.

4. The SL DRX active time information is A timing period of the SL DRX on-duration timer, A counting period of the SL DRX inactivity timer; A time period for the SL DRX retransmission timer, A slot in which the SL periodic transmission is located; The slot in which the initial transmission or retransmission indicated by the SCI is located, and The data transmission device according to claim 3 , wherein the delay limit is at least one of a delay upper limit for sidelink channel state information reporting (SL CSI reporting).

5. 2. The data transmission device according to claim 1, wherein the destination associated with the sidelink resource is a destination used by the first terminal device in a resource selection and / or reselection procedure.

6. The first terminal device, in a resource selection and / or reselection procedure, If resource selection and / or reselection is triggered, the destination where the logical channel or MAC CE with the highest priority or smallest PDB is located; The destination where the logical channel or MAC CE with the data to be transmitted is located, and The data transmission device according to claim 5, wherein at least one of the destinations of the second terminal device for which sidelink resource coordination is required is used.

7. 2. The data transmission device of claim 1, wherein the auxiliary information is SL DRX active time information or sidelink available resources corresponding to the destination, and a physical layer of the first terminal device selects sidelink resources within the SL DRX active time or the sidelink available resources to configure the sidelink resource subset.

8. 6. The data transmission device of claim 5, wherein the processor is adapted to determine, at a MAC layer of the first terminal device, a destination to be used in a resource selection and / or reselection procedure and to select the sidelink resource from a sidelink resource subset reported by a physical layer based on auxiliary information corresponding to the destination.

9. 9. The data transmission device of claim 8, wherein the auxiliary information is SL DRX active time information or sidelink resources corresponding to the destination, and the MAC layer of the first terminal device selects sidelink resources within the SL DRX active time or sidelink available resources from the sidelink resource subset.

10. The SL DRX active time information is A timing period of the SL DRX on-duration timer, A counting period of the SL DRX inactivity timer; A time period for the SL DRX retransmission timer, A slot in which the SL periodic transmission is located; The slot in which the initial transmission or retransmission indicated by the SCI is located, and The data transmission device according to claim 9 , wherein the delay limit is at least one of a delay upper limit for sidelink channel state information reporting (SL CSI reporting).

11. a receiver for receiving the second sidelink resource allocated by the network device, If there is a second destination having a logical channel or MAC CE with the highest priority and the sidelink resource is not included in the SL DRX active time corresponding to the second destination, the processor triggers an SR or an SL-BSR; 2. The data transmission device of claim 1, wherein the transmitter is configured to transmit a second sidelink transmission to a second terminal device corresponding to the second destination using the second sidelink resources.

12. if there is a second destination with a logical channel or MAC CE with the highest priority and the sidelink resource is not included in the SL DRX active time corresponding to the second destination, the processor triggers resource selection and / or reselection to obtain a second sidelink resource; 2. The data transmission device of claim 1, wherein the transmitter is configured to transmit a second sidelink transmission to a second terminal device corresponding to the second destination using the second sidelink resources.

13. A first terminal device; A communication system including: a second terminal device that performs sidelink discontinuous reception (SL DRX), The first terminal device is performing sidelink transmission with the second terminal device; Determine side-link resources, Selecting a destination in a Logical Channel Priority Handling (LCP) procedure; Determining at a MAC layer a destination to be used in a resource selection and / or reselection procedure; notifying a physical layer of auxiliary information corresponding to the destination; selecting a sidelink resource subset based on the auxiliary information in the physical layer and reporting the selected subset to the MAC layer; selecting, at the MAC layer, the sidelink resource from the sidelink resource subset; sending the sidelink transmission to the second terminal device corresponding to the selected destination, the sidelink resource being located within an SL DRX active time corresponding to the destination; A communication system, wherein the second terminal device receives the sidelink transmission.

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