Method, apparatus and system for triggering sidelink discontinuous reception command

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 performing sidelink transmission with a second terminal device, the second terminal device using sidelink discontinuous reception (SL DRX), the method including: the first terminal device determining a sidelink resource; the first terminal device selecting a destination associated with the sidelink resource in a Logical Channel Prioritization (LCP) process; and transmitting the sidelink transmission to the second terminal device corresponding to the destination selected by the first terminal device.

Description

[Technical field]

[0001] The present invention relates to the technical field of communications. [Background technology]

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

[0003] In existing standards, in order to save power, downlink discontinuous reception (DRX) can be configured in a terminal device, 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] It should be noted that the introduction of the above background art is intended to clearly and completely explain the technical solutions of the present invention, and to facilitate understanding thereof by those skilled in the art, and these technical solutions are described in the background art of the present invention, and therefore should not be construed as being known to those skilled in the art. Summary of the Invention [Problem to be solved by the invention]

[0005] The inventor has found that, for sidelink DRX (SL DRX), RAN2 of 3GPP (registered trademark) agrees to the following content, that is, for SL DRX operation in unicast, the sidelink discontinuous reception command (SL DRX command) MAC CE is introduced. However, after the SL DRX command MAC CE is introduced, the following problems exist, that is, Problem 1) The SL DRX command MAC CE can be sent by the transmitting device (Tx UE) to the receiving device (Rx UE), but it is not known when the transmitting device triggers the SL DRX command MAC CE; Problem 2) When the transmitting device intends to transmit only the SL DRX command MAC CE, in mode-1, how can the transmitting device inform the network device of this situation and allow it to allocate appropriate SL resources; Problem 3) How to perform the resource pool selection and logical channel priority handling (LCP) process (procedure) when the SL DRX command MAC CE supports Hybrid Automatic Repeat Request (HARQ) feedback enabled; and Problem 4) The priority of the SL DRX command MAC CE when allocating sidelink resources and when compared with other MAC CEs or logical channels is unclear.

[0006] In order to solve at least one of the above problems, the present invention aims to provide a method, an apparatus and a system for triggering a sidelink discontinuous reception command. [Means for solving the problem]

[0007] According to an aspect of an embodiment of the present invention, a sidelink discontinuous reception command (SL DRX command) triggering device is provided, which is disposed in a first terminal device, the first terminal device performs sidelink transmission with a second terminal device, and the second terminal device uses sidelink discontinuous reception (SL DRX), wherein the device: The MAC layer of the first terminal device includes a trigger unit for triggering a sidelink discontinuous reception command when one of the following conditions is satisfied: There is no data pending for transmission on a logical channel corresponding to a destination or a pair of source ID and destination ID or a PC5 5G QoS identifier (PQI), or there is no data pending for transmission in the current service period, or there is no data pending for transmission in the past predetermined period or when a timer expires; There is no MAC CE pending for a destination or source-destination pair, or there is no MAC CE pending for the current service period, or there is no MAC CE pending for the past predetermined period or when a timer expires; and The condition is that the upper layer of the first terminal device has indicated that the MAC layer of the first terminal device has no data waiting to be transmitted or has not had data waiting to be transmitted within a predetermined period of time.

[0008] According to another aspect of an embodiment of the present invention, there is provided a scheduling request triggering device corresponding to a sidelink discontinuous reception command, the device being disposed in a first terminal device, the first terminal device performing sidelink transmission with a second terminal device, and the second terminal device using sidelink discontinuous reception (SL DRX), wherein the device comprises: A first triggering unit for, after triggering a sidelink discontinuous reception command, triggering a first scheduling request corresponding to the sidelink discontinuous reception command.

[0009] According to another aspect of an embodiment of the present invention, a resource pool selection device is provided, which is disposed in a first terminal device, the first terminal device performs sidelink transmission with a second terminal device, and the second terminal device uses sidelink discontinuous reception (SL DRX), wherein the device includes: When there is data waiting to be transmitted in a sidelink logical channel and a sidelink discontinuous reception command is triggered, the selection unit selects a resource pool based on a HARQ feedback attribute of the sidelink logical channel or based on a HARQ feedback attribute of the sidelink discontinuous reception command according to a priority of the sidelink logical channel and the sidelink discontinuous reception command.

[0010] According to yet another aspect of an embodiment of the present invention, a logical channel selection device is provided, which is disposed in a first terminal device, the first terminal device performs sidelink transmission with a second terminal device, and the second terminal device uses sidelink discontinuous reception (SL DRX), wherein the device comprises: A determination unit for determining sidelink resources for transmitting sidelink data; and Includes a selection unit, In a Logical Channel Priority Processing (LCP) process, the selection unit selects, from the first MAC CE and / or first logical channel, a destination including a second MAC CE or a second logical channel that satisfies a predetermined condition and has the highest priority, and the first MAC CE satisfies the following condition: if a PSFCH is not configured for the sidelink resource, a HARQ feedback attribute of the MAC CE is set to disabled.

[0011] According to another aspect of an embodiment of the present invention, a logical channel selection device is provided, which is disposed in a first terminal device, the first terminal device performs sidelink transmission with a second terminal device, and the second terminal device uses sidelink discontinuous reception (SL DRX), wherein the device comprises: A determination unit for determining sidelink resources for transmitting a sidelink transmission; and Includes a selection unit, When a PSFCH is configured for the sidelink resource and a HARQ feedback attribute corresponding to a highest priority logical channel or a sidelink discontinuous reception command MAC CE that satisfies a predetermined condition is set to enabled, the selection unit selects, in an LCP process, a logical channel or a sidelink discontinuous reception command MAC CE with a HARQ feedback attribute set to enabled; When a PSFCH is configured for the sidelink resource and a HARQ feedback attribute corresponding to a highest priority logical channel or a sidelink discontinuous reception command MAC CE that satisfies a predetermined condition is set to disabled, the selection unit selects, in an LCP process, a logical channel or a sidelink discontinuous reception command MAC CE whose HARQ feedback attribute is set to disabled.

[0012] According to another aspect of an embodiment of the present invention, a sidelink transmission transmitting device is provided, which is disposed in a first terminal device, the first terminal device performs sidelink transmission with a second terminal device, and the second terminal device uses sidelink discontinuous reception (SL DRX), wherein the device: A transmitting unit for transmitting a sidelink discontinuous reception command MAC CE to the second terminal device, The sidelink discontinuous reception commands MAC CE have a configured or predefined priority. Effect of the Invention

[0013] One of the advantageous effects of the embodiment of the present invention is that, on the one hand, the SL DRX command MAC CE can be triggered at a precise time, so that the power consumption of the receiving device can be saved, and on the other hand, the resource pool selection and LCP process execution can be performed according to the HARQ attribute of the SL DRX command MAC CE, so that the reliability of the transmission of the SL DRX command MAC CE can be ensured. In addition, the network device can be notified of the allocation of sidelink resources or the stop of the allocation of sidelink resources in a timely manner, so that the transmission delay (latency) of the SL DRX command MAC CE can be reduced or the waste of sidelink resources can be avoided.

[0014] Specific embodiments of the present invention are disclosed in detail below with reference to the following description and drawings, which show how the principles of the present invention may be employed, but are not limited in scope to these embodiments, which may include various changes, modifications, and alternatives within the scope of the appended claims.

[0015] Additionally, features described and / or illustrated in one embodiment may be used in the same or similar manner in one or more other embodiments, may be combined with features in the other embodiments, or may be substituted for features in the other embodiments.

[0016] It should be noted that terms such as "comprise / have" when used in this specification refer to the presence of a feature, element, step, or assembly, but do not exclude the presence or addition of one or more other features, elements, steps, or assemblies. [Brief description of the drawings]

[0017] Elements and features described in one drawing or one embodiment of the invention may be combined with elements and features shown in one or more other drawings or embodiments, and in the drawings, like reference numerals are used to indicate corresponding parts in several drawings and to indicate corresponding parts used in multiple embodiments. [Figure 1] FIG. 13 is a diagram illustrating a DRX period. [Diagram 2] FIG. 2 illustrates a duration timer and an inactivity timer. [Diagram 3] FIG. 1 illustrates a method for triggering a sidelink discontinuous reception command according to an embodiment of the present invention. [Figure 4] FIG. 1 illustrates a method for triggering a scheduling request in response to a sidelink discontinuous reception command according to an embodiment of the present invention. [Diagram 5] FIG. 11 is a diagram illustrating a method for selecting a resource pool in an embodiment of the present invention. [Figure 6] A diagram showing a logical channel selection method in an embodiment of the present invention. [Figure 7] FIG. 2 is another diagram illustrating a logical channel selection method according to an embodiment of the present invention. [Figure 8] A diagram showing a sidelink transmission method according to an embodiment of the present invention. [Figure 9] FIG. 1 illustrates an example scenario for sidelink buffer status reporting. [Figure 10] FIG. 1 illustrates a method for generating a sidelink buffer status report in an embodiment of the present invention. [Figure 11] FIG. 1 illustrates a triggering device for a sidelink discontinuous reception command according to an embodiment of the present invention. [Figure 12] FIG. 1 illustrates a triggering device for a scheduling request in response to a sidelink discontinuous reception command according to an embodiment of the present invention; [Figure 13] FIG. 2 is a diagram illustrating a resource pool selection device according to an embodiment of the present invention. [Figure 14] FIG. 2 is a diagram showing a logical channel selection device in an embodiment of the present invention. [Figure 15] FIG. 2 is another diagram showing a logical channel selection device according to an embodiment of the present invention. [Figure 16] FIG. 2 illustrates a transmitting device for sidelink transmission according to an embodiment of the present invention. [Figure 17]FIG. 1 illustrates a device for generating a sidelink buffer status report in an embodiment of the present invention. [Figure 18] FIG. 2 is a diagram illustrating a terminal device according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] The above and other features of the present invention will become apparent from the following detailed description and the accompanying drawings, in which: While the specification and drawings disclose specific embodiments of the present invention, these are only some of the embodiments which may employ the principles of the present invention, and it is to be understood that the present invention is not limited to the described embodiments, but rather includes all modifications, variations and alternatives within the scope of the appended claims.

[0019] 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 Long Term Evolution (LTE), LTE-Advanced (LTE-A), Wideband Code Division Multiple Access (WCDMA), High-Speed ​​Packet Access (HSPA), etc.

[0020] Additionally, communications between devices in the communications system may be performed according to any stage of communications protocol, including, but not limited to, the following communications protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G, 5G, New Radio (NR), and / or other conventional or future developed communications protocols.

[0021] In the embodiment of the present invention, the term "network device" refers to a device that connects a terminal device to a communication network and provides services to the terminal device in a communication system, for example, 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 mobile management entity (MME), a network gateway, a server, a radio network controller (RNC), a base station controller (BSC), etc.

[0022] Among them, the base station may include, but is not limited to, the following: Node B (NodeB or NB), evolved Node B (eNodeB or eNB), 5G base station (gNB), etc., and may further include RRH (Remote Radio Head), RRU (Remote Radio Unit), relay, or low power node (e.g., femto, pico, etc.). In addition, the term "base station" may include some or all of the functions thereof, and each base station can provide communication coverage for a specific geographical area. The term "cell" may refer to a base station and / or the area it covers, depending on the context of the term.

[0023] In the embodiments of the present invention, the term "User Equipment" (UE) or "Terminal Equipment" (TE) refers to a device that accesses a communication network and receives services from the network, for example, via a network device. A User Equipment may be fixed or mobile, and may also be called a Mobile Station (MS), a terminal, a Subscriber Station (SS), an Access Terminal (AT), a station, etc.

[0024] Among these, user devices may include, but are not limited to, the following: cellular phones, personal digital assistants (PDAs), wireless modems, wireless communication devices, handheld devices, machine type communication devices, laptop computers, cordless telephones, smartphones, smart watches, digital cameras, etc.

[0025] Furthermore, in scenarios such as the Internet of Things (IoT), the user equipment may further be a monitoring or measuring instrument or device, 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.

[0026] In addition, the term "network side" or "network device side" refers to the network side, which may be a base station or a core network device, and may include one or more network devices as described above. The term "user side" or "terminal side" or "terminal device side" refers to the user or terminal side, which may be a UE, and may include one or more terminal devices as described above. In this specification, unless otherwise specified, "device" may refer to a network device or a terminal device.

[0027] FIG. 1 is a diagram showing a DRX cycle. As shown in FIG. 1, one DRX cycle specifies a duration and a possible inactive time thereafter (Opportunity for DRX), and the duration is a duration during which a terminal device waits for reception of an SCI after waking up (for example, including monitoring a first stage SCI in a PSCCH and / or a second stage SCI in a PSSCH), and when a terminal device successfully decodes an SCI for scheduling a new transmission transmitted to itself, the terminal device maintains a wake-up state and starts an inactivity timer. The inactivity timer refers to a duration during which the terminal device waits for successful decoding of an SCI after successfully decoding an SCI last time, and when the terminal device cannot successfully decode an SCI within the time period of the inactivity timer, the terminal device returns to a sleep state, and the terminal device needs to start the inactivity timer after successfully decoding an SCI only for an initial transmission once.

[0028] In an embodiment of the present invention, the active time of SL DRX refers to the total time during which the terminal device monitors the SCI (e.g., including monitoring the second stage SCI in the PSCCH and the monitored PSSCH), and includes the on-duration of the SL DRX period, the time during which the terminal device performs continuous reception when the inactivity timer has not expired, and the time during which the terminal device performs continuous reception while waiting for a retransmission opportunity.

[0029] In an embodiment of the present invention, the DRX configuration may further include a retransmission timer, which specifies the expected duration for which a retransmission is likely.

[0030] FIG. 2 shows an on duration timer and an inactivity timer.

[0031] Regarding SL DRX, as shown in FIG. 2, when a receiving device (Rx UE) receives a sidelink discontinuous reception command (SL DRX command) during a running period of a duration timer, the duration timer is stopped. For example, when the Rx UE receives an SL DRX command for one destination or a pair of source ID and destination ID or a PC5 5G QoS identifier (PQI), the duration timer for the destination or the source-destination pair or the PQI is stopped. Also, when the receiving device (Rx UE) receives an SCI from a transmitting device (Tx UE) during a running period of the duration timer or the inactivity timer, for example, when a first stage SCI in a PSCCH and / or a second stage SCI in a PSSCH is received, an inactivity timer is started. When a SL DRX command is received during a running period of the inactivity timer, the inactivity timer is stopped. For example, when the Rx UE receives an SL DRX command for one destination or a pair of source ID and destination ID, the duration timer for the destination or the source-destination pair or the PQI is stopped. If the UE receives a SL DRX command for one destination or source-destination pair or PQI of one Tx UE transmission within the running period of the duration timer or inactivity timer, it shall stop the inactivity timer for that destination or source-destination pair or PQI.

[0032] In the embodiment of the present invention, an example is described in which a first terminal device performs sidelink transmission with a second terminal device. In addition, it may be said that the second terminal device uses SL DRX, or that SL DRX is configured for the second terminal device, or that the second terminal device performs SL DRX operation. Here, the SL DRX configuration may be configured by a network device for the second terminal device, may be preconfigured for the second terminal device, or may be configured by the first terminal device for the second terminal device via a sidelink (for example, using an RRC reconfiguration sidelink message, etc.). Here, the sidelink transmission may include transmission of sidelink data, control information, feedback information, reference signals, etc. In addition, from the perspective of transmission of sidelink transmission, the first terminal device in the embodiment of the present invention is a transmitting device (Tx UE), and the second terminal device is a receiving device (Rx UE).

[0033] Various embodiments of the present invention will now be described with reference to the accompanying drawings, in which: It should be noted that these embodiments are merely illustrative and are not intended to limit the present invention.

[0034] <Example of the first aspect> In an embodiment of the present invention, a method for triggering a sidelink discontinuous reception command (SL DRX command) is provided, and is described from the first terminal device side.

[0035] 3 is a diagram illustrating a method for triggering a sidelink discontinuous reception command according to an embodiment of the present invention. As shown in FIG. 3, the method includes the following steps (operations):

[0036] 301: The MAC layer of a first terminal device triggers a sidelink discontinuous reception command when one of the following conditions (referred to as a first condition) is satisfied: There is no data pending for transmission on a logical channel corresponding to a destination or a pair of source ID and destination ID or a PC5 5G QoS identifier (PQI), or there is no data pending for transmission in the current service period, or there is no data pending for transmission in the past predetermined period or when a timer expires; There is no MAC CE pending for a destination or source-destination pair, or there is no MAC CE pending for the current service period, or there is no MAC CE pending for the past predetermined period or when a timer expires; and The condition is that the upper layer of the first terminal device has indicated that the MAC layer of the first terminal device has no data waiting to be transmitted or has not had data waiting to be transmitted within a predetermined period of time.

[0037] In an embodiment of the present invention, a SL DNR command is triggered if one of the above first conditions is satisfied, so that the SL DNR command can be triggered or cancelled at a correct time, thereby saving power consumption of the receiving device (Rx UE) or preventing increased delay in data transmission.

[0038] In some embodiments, the absence of data waiting to be transmitted in a logical channel corresponding to one destination or source-destination pair or one PQI refers to the buffer size of the logical channel corresponding to one destination or source-destination pair or one PQI being 0. However, the present invention is not limited thereto, and the absence of data waiting to be transmitted in the above-mentioned logical channel may also refer to other things.

[0039] In some embodiments, the current service period according to the first condition includes at least one of the following: a sidelink service period (e.g., when the sidelink service is a periodic service); a sidelink discontinuous reception cycle (SL DRX cycle); a timing period of a sidelink discontinuous reception on-duration timer (SL DRX on-duration timer); and a timing period of a sidelink discontinuous reception inactivity timer (SL DRX inactivity timer). Note that the present invention is not limited thereto. Also, the above-mentioned timing period refers to a value of the above-mentioned timer, and the value of the timer represents one timing period of the timer.

[0040] In some embodiments, the timer related to the first condition includes at least one of the following: a network device configured (e.g., configured by an RRC message) or a predefined timer; a sidelink discontinuous reception duration timer (SL DRX on-duration timer); and a sidelink discontinuous reception inactivity timer (SL DRX inactivity timer). Among them, the SL DRX on-duration timer and / or the SL DRX inactivity timer may be configured by the network device via system information or an RRC dedicated message, or may be preconfigured. However, the present invention is not limited thereto.

[0041] In some embodiments, the time period related to the first condition includes at least one of the following: a network device configured (e.g., configured by an RRC message) or a predefined time period; a sidelink service cycle; a sidelink discontinuous reception cycle (SL DRX cycle); a timing cycle of a sidelink discontinuous reception on-duration timer (SL DRX on-duration timer); and a timing cycle of a sidelink discontinuous reception inactivity timer (SL DRX inactivity timer). Note that the present invention is not limited thereto. Also, the above-mentioned timing cycle refers to a value of the above-mentioned timer, and the value of the timer represents one timing cycle of the timer.

[0042] In some embodiments, the timing cycles of the above-mentioned SL DRX cycle and / or the SL DRX on-duration timer and / or the SL DRX inactivity timer may be set by the network device using system information or an RRC dedicated message, may be set in advance, or may be set by the terminal device at the opposite end (opponent side) of the SL using an SL RRC message, although the present invention is not limited thereto.

[0043] In some embodiments, the higher layer according to the first condition is one of the following: a V2X layer, a non-access stratum (NAS), and a radio resource control (RRC) layer, although the present invention is not limited thereto.

[0044] In some embodiments, the MAC layer of the first terminal device generates a sidelink discontinuous reception command MAC CE when sidelink resources are available, and transmits the sidelink discontinuous reception command MAC CE to the second terminal device via the sidelink resources.

[0045] In an embodiment of the present invention, as shown in FIG. 3, the method may further include the following steps:

[0046] 302: The MAC layer of the first terminal device cancels a sidelink discontinuous reception command if one of the following conditions (referred to as a second condition) is satisfied: for a destination or a source-destination pair or a PQI for which the sidelink discontinuous reception command was triggered, new data arrives on a logical channel corresponding to the destination or the source-destination pair or the PQI; for a destination or source-destination pair for which the sidelink discontinuous reception command is triggered, there is another MAC CE that is also triggered; The upper layer of the first terminal device indicates to the MAC layer of the first terminal device that data has arrived; a medium access control element (MAC CE) of the sidelink discontinuous reception command transmitted on a sidelink; The first terminal device receives Hybrid Automatic Repeat Request (HARQ) feedback of the second terminal device transmission; and The condition is that the upper layer of the first terminal device has reconfigured the discontinuous reception setting.

[0047] In an embodiment of the present invention, the SL DNR command is cancelled if one of the above second conditions is satisfied, so that the SLNR command can be cancelled at the correct time, allowing the Rx UE to keep monitoring the SL SCI and / or data, thereby preventing increased delay in data transmission.

[0048] In some embodiments, the above-mentioned other MAC CE may be another MAC CE to be transmitted on the sidelink, such as a SL CSI reporting MAC CE.

[0049] In some embodiments, the higher layer of the first terminal device resetting the discontinuous reception setting includes the higher layer of the first terminal device resetting the SL and / or DL ​​discontinuous reception setting for the destination or source-destination pair or PQI for which the sidelink discontinuous reception command was triggered, although the present invention is not limited thereto.

[0050] In some embodiments, the discontinuous reception configuration includes a value of a SL DRX on-duration timer and / or a value of a SL DRX inactivity timer and / or a value of a SL DRX retransmission timer and / or a value of a SL DRX cycle and / or an upper limit on the latency of CSI reporting.

[0051] In some embodiments, the higher layer according to the second condition is one of the following: a V2X layer, a non-access stratum (NAS), and a radio resource control (RRC) layer, although the present invention is not limited thereto.

[0052] The above-mentioned embodiments are provided to exemplify the embodiments of the present invention, but the present invention is not limited thereto, and furthermore, appropriate modifications may be made based on the above-mentioned embodiments. For example, the above-mentioned embodiments may be used alone, or a combination of two or more of the above-mentioned embodiments may be used.

[0053] Although the above description has been given using the example of performing operation 301 alone or performing operations 301 and 302 jointly, the present invention is not limited thereto. Furthermore, operation 302 may be performed alone, i.e., the performance of operation 302 does not depend on operation 301, and the MAC layer of the first terminal device may cancel the sidelink discontinuous reception command when one of the above-mentioned second conditions is satisfied.

[0054] The method according to the embodiment of the present invention can save the power consumption of the receiving device (Rx UE) or prevent the increase in delay of data transmission.

[0055] <Example of the second aspect> In an embodiment of the present invention, a method for triggering a scheduling request corresponding to a sidelink discontinuous reception command is provided, and is described from the first terminal device side.

[0056] 4 is a diagram illustrating a method for triggering a scheduling request in response to a sidelink discontinuous reception command according to an embodiment of the present invention. As shown in FIG. 4, the method includes the following steps (operations):

[0057] 401: After a first terminal device triggers a sidelink discontinuous reception command, it triggers a first scheduling request corresponding to the sidelink discontinuous reception command.

[0058] In the above embodiment, after the sidelink discontinuous reception command is triggered, a corresponding SR (referred to as a first scheduling request) is triggered to request the network device to allocate sidelink resources thereto, and the network device can allocate appropriate sidelink resources for the first terminal device based on this.

[0059] In some embodiments, the first terminal device may trigger the first scheduling request corresponding to the sidelink discontinuous reception command if one of the following conditions (third condition) is satisfied: No sidelink resources (SL grant) for new transmission; The sidelink resource (SL grant) for the new transmission cannot accommodate the sidelink discontinuous reception command (MAC CE) and its sub-header; and The condition is that the sidelink resource (SL grant) for the new transmission cannot accommodate the subheader of the sidelink discontinuous reception command MAC CE.

[0060] In the above embodiment, based on the above first scheduling request, the network device can allocate an appropriate SL grant to the first terminal device.

[0061] In an embodiment of the present invention, optionally, as shown in FIG. 4, the method may further include the following steps:

[0062] 402: After the first terminal device sends the sidelink discontinuous reception command, trigger a second scheduling request corresponding to the sidelink discontinuous reception command.

[0063] In the above embodiment, after the sidelink discontinuous reception command is sent, a corresponding SR (referred to as a second scheduling request) is triggered to notify (report) the network device not to allocate sidelink resources to it, and the network device can stop allocating sidelink resources for the first terminal device based on this.

[0064] In some embodiments, the first terminal device may trigger the second scheduling request corresponding to the sidelink discontinuous reception command when one of the following conditions (fourth condition) is satisfied, namely: The sidelink resource for the new transmission (SL grant) can accommodate the sidelink discontinuous reception command MAC CE and its subheader and all pending data; and The condition is that the sidelink resources for the new transmission (SL grant) must be able to accommodate the sub-header of the sidelink discontinuous reception command MAC CE and all pending data.

[0065] In the above embodiment, based on the above second scheduling request, the network device can stop allocating the SL grant for the first terminal device.

[0066] In some embodiments, the network device may further configure at least one corresponding SR setting for the sidelink discontinuous reception command. For example, the first terminal device may receive configuration information transmitted by the network device, the configuration information including the above-mentioned at least one SR setting, and the first terminal device may transmit the above-mentioned first scheduling request and / or the above-mentioned second scheduling request corresponding to the above-mentioned sidelink discontinuous reception command using the at least one SR setting of the at least one SR setting.

[0067] In some embodiments, the above-mentioned configuration information is included in RRC signaling, i.e., the network device configures the above-mentioned at least one SR configuration through RRC signaling, but the present invention is not limited thereto, and the above-mentioned configuration information may also be included in other signaling transmitted by the network device.

[0068] In some embodiments, the above-mentioned SR setting includes a PUCCH resource on a bandwidth part (BWP), that is, the first terminal device uses a PUCCH resource on the BWP to transmit the above-mentioned first scheduling request and / or the above-mentioned second scheduling request.

[0069] In some embodiments, the at least one SR configuration is at least one of the following: an SR configuration configured by the network device for the sidelink discontinuous reception command (MAC CE); an SR configuration configured by the network device for a sidelink logical channel; an SR configuration configured by the network device for a sidelink channel state information reporting (MAC CE); and an SR configuration configured by the network device for a sidelink or uplink logical channel or MAC CE.

[0070] For example, if one of the above-mentioned third conditions is satisfied after the first terminal device triggers a sidelink discontinuous reception command, the first terminal device may send a first scheduling request to the network device using at least one of the above-mentioned SR settings, requesting the network device to allocate sidelink resources to it.

[0071] Also, for example, if one of the above-mentioned fourth conditions is satisfied after the first terminal device sends a sidelink discontinuous reception command, the first terminal device can send a second scheduling request to the network device using at least one of the above-mentioned SR settings, and report (notify) that the network device should not allocate sidelink resources to it.

[0072] In some embodiments, the network device can configure different SR settings for the first scheduling request and the second scheduling request in the RRC reconfiguration message, so that the network device can distinguish between different cases, but the present invention is not limited thereto, and the first scheduling request and the second scheduling request may have the same SR setting.

[0073] In an embodiment of the present invention, optionally, as shown in FIG. 4, the method may further include the following steps:

[0074] 403: When a sidelink discontinuous reception command MAC CE is transmitted, cancel the first scheduling request corresponding to the sidelink discontinuous reception command.

[0075] In the above embodiment, after the sidelink discontinuous reception command MAC CE is sent, the SR (first scheduling request) corresponding to the sidelink discontinuous reception command is cancelled, and the network device is notified (reported) not to allocate sidelink resources to it, and the network device can stop allocating sidelink resources for the first terminal device based on this.

[0076] It should be noted that the above FIG. 4 is for illustrative purposes only and the present invention is not limited thereto. For example, the execution order of each operation may be appropriately adjusted, or some operations may be added or removed. Those skilled in the art are not limited to the description of the above FIG. 4 and may make appropriate modifications based on the above content. In addition, although the above-mentioned embodiments are provided to exemplify the embodiments of the present invention, the present invention is not limited thereto, and furthermore, appropriate modifications may be made based on the above-mentioned embodiments. For example, the above-mentioned embodiments may be used alone, or a combination of the above-mentioned embodiments may be used.

[0077] In addition, although the above description has been given using the example of performing operation 401 alone or performing operations 401 and 402 jointly, the present invention is not limited thereto. Furthermore, operation 402 may be performed alone, that is, the performance of operation 402 does not depend on operation 401, and the first terminal device may trigger a second scheduling request corresponding to the sidelink discontinuous reception command after sending the sidelink discontinuous reception command.

[0078] The method according to the embodiment of the present invention makes it possible to avoid wasting sidelink resources.

[0079] <Example of the third aspect> In an embodiment of the present invention, a method for selecting a resource pool is provided, and is described from the first terminal device side.

[0080] 5 is a diagram illustrating a method for selecting a resource pool according to an embodiment of the present invention. As shown in FIG. 5, the method includes the following steps (operations):

[0081] 501: When there is data waiting to be transmitted on a sidelink logical channel and a sidelink discontinuous reception command is triggered, a first terminal device selects a resource pool based on a HARQ feedback attribute of the sidelink logical channel or based on a HARQ feedback attribute of the sidelink discontinuous reception command according to the priority of the sidelink logical channel and the sidelink discontinuous reception command.

[0082] In the above embodiment, the priority and HARQ feedback attribute of the sidelink discontinuous reception command are taken into consideration when selecting a resource pool, so that the reliability of the transmission of the sidelink discontinuous reception command MAC CE can be guaranteed.

[0083] In some embodiments, if the priority of a sidelink logical channel is equal to or higher than the priority of the sidelink discontinuous reception command, the first terminal device selects a resource pool in which the PSFCH resource is configured from the network device configured or pre-configured resource pools when the HARQ feedback attribute (sl-HARQ-FeedbackEnabled) of the sidelink logical channel is set as enabled. Otherwise, i.e. when the HARQ feedback attribute of the sidelink logical channel is not set as enabled, the first terminal device selects one resource pool from the network device configured or pre-configured resource pools.

[0084] In some embodiments, if the priority of the sidelink discontinuous reception command is greater than the priority of the sidelink logical channel, the first terminal device selects a resource pool in which the PSFCH resource is configured from the network device configured or pre-configured resource pools when the HARQ feedback attribute (sl-HARQ-FeedbackEnabled) of the sidelink discontinuous reception command is set to enabled. Otherwise, i.e. when the HARQ feedback attribute (sl-HARQ-FeedbackEnabled) of the sidelink discontinuous reception command is not set to enabled, the first terminal device selects one resource pool from the network device configured or pre-configured resource pools.

[0085] In the above-mentioned embodiment, when only data of a logical channel is waiting to be transmitted, the first terminal device can select a resource pool in which a PSFCH resource is configured from a network device-configured or pre-configured resource pool when the HARQ feedback attribute of the sidelink logical channel is set to enabled; otherwise, i.e., when the HARQ feedback attribute of the sidelink logical channel is not set to enabled, the first terminal device selects one resource pool from the network device-configured or pre-configured resource pool.

[0086] In the above-mentioned embodiment, when only the sidelink discontinuous reception command is triggered, the first terminal device can select a resource pool in which the PSFCH resource is configured from the network device configured or pre-configured resource pools when the HARQ feedback attribute of the sidelink discontinuous reception command is set to enabled; otherwise, i.e., when the HARQ feedback attribute of the sidelink discontinuous reception command is not set to enabled, the first terminal device selects one resource pool from the network device configured or pre-configured resource pools.

[0087] In the above embodiment, when there is a triggered SL-CSI reporting, the first terminal device can select a resource pool from a network device configured or pre-configured resource pool.

[0088] The above-mentioned embodiments can be described as follows.

[0089] [Table 1] In the above-described embodiments, the network device-configured resource pool refers to a resource pool for sidelink transmission (SL transmission) configured by the network device through system information or RRC dedicated signaling, and the pre-configured resource pool refers to a resource pool for sidelink transmission configured through pre-configuration.

[0090] Although the above-mentioned embodiments are provided to exemplify the embodiments of the present invention, the present invention is not limited thereto, and furthermore, appropriate modifications may be made based on the above-mentioned embodiments. For example, the above-mentioned embodiments may be used alone, or a combination of the above-mentioned embodiments may be used.

[0091] The method according to the embodiment of the present invention can ensure the reliability of sidelink discontinuous reception command MAC CE transmission.

[0092] <Example of the fourth aspect> In an embodiment of the present invention, a logical channel selection method is provided, which is described from the first terminal device side.

[0093] 6 is a diagram illustrating a logical channel selection method according to an embodiment of the present invention. As shown in FIG. 6, the method includes the following steps (operations):

[0094] 601: A first terminal device determines a sidelink resource for transmitting a sidelink transmission; and 602: The first terminal device selects a destination in a logical channel priority processing (LCP) process, and the destination has a first MAC CE and / or a second logical channel or a second MAC CE with the highest priority among the first logical channels that satisfy a predetermined condition, and the first MAC CE satisfies the following condition (a fifth condition): The condition is that if a PSFCH is not configured for the sidelink resource, the HARQ feedback attribute of the MAC CE is set to disabled.

[0095] In the above-mentioned embodiment, for an SL grant for which a PSFCH is not set in a sidelink LCP process, a sidelink MAC PDU assembly process, or a sidelink MAC PDU generation process, when selecting a destination, the first terminal device selects the logical channel (second logical channel) or MAC CE (second MAC CE) with the highest priority from among the logical channels (first logical channels) that satisfy a predetermined condition and from among the MAC CEs (first MAC CEs) that satisfy the above-mentioned fifth condition, and sets the destination where the selected MAC CE or logical channel is located as the destination.

[0096] In the above embodiment, the predetermined condition is: There is sidelink data waiting to be sent; If there is a logical channel with a sidelink token greater than 0, the sidelink token of the logical channel is greater than 0; If the SL grant is a configured grant Type 1, allow the logical channel to be transmitted using a configured grant Type 1; For a logical channel, it is configured to allow the use of an index of a configured grant associated with the SL grant; and It includes a condition that if PSFCH is not configured for a SL grant, the sidelink HARQ feedback attribute of the logical channel is set to disabled.

[0097] For the above-mentioned predetermined conditions, reference can be made to related art, and detailed explanation thereof will be omitted here.

[0098] 7 is another diagram showing a logical channel selection method according to an embodiment of the present invention. As shown in FIG. 7, the method includes the following steps:

[0099] 701: A first terminal device determines a sidelink resource for sending a sidelink transmission; 702: When a PSFCH is configured for the sidelink resource and a HARQ feedback attribute corresponding to a highest priority logical channel or a sidelink discontinuous reception command MAC CE that satisfies a predetermined condition is set to enabled, the first terminal device selects a logical channel or a sidelink discontinuous reception command MAC CE with the HARQ feedback attribute set to enabled in an LCP process; and 703: When a PSFCH is configured for the sidelink resource and a HARQ feedback attribute corresponding to a highest priority logical channel or a sidelink discontinuous reception command MAC CE that satisfies a predetermined condition is set to disabled, the first terminal device selects in an LCP process a logical channel or a sidelink discontinuous reception command MAC CE whose HARQ feedback attribute is set to disabled.

[0100] In the above embodiment, in the sidelink LCP process, for an SL grant for which a PSFCH is set, if HARQ feedback corresponding to the highest priority logical channel or the sidelink discontinuous reception command MAC CE is enabled, a logical channel or a sidelink discontinuous reception command MAC CE for which HARQ feedback is enabled is selected, and if HARQ feedback corresponding to the highest priority logical channel or the sidelink discontinuous reception command MAC CE is disabled, a logical channel or a sidelink discontinuous reception command MAC CE for which HARQ feedback is disabled is selected.

[0101] The above-mentioned embodiments are provided to exemplify the embodiments of the present invention, but the present invention is not limited thereto, and furthermore, appropriate modifications may be made based on the above-mentioned embodiments. For example, the above-mentioned embodiments may be used alone, or a combination of two or more of the above-mentioned embodiments may be used.

[0102] For example, in conjunction with the embodiments of FIGS. 6 and 7, the following modifications can be made to the current standard:

[0103] [Table 2] According to the above-mentioned embodiments of Figures 6 and 7, the LCP process is performed based on the HARQ attribute of the sidelink discontinuous reception command MAC CE, thereby ensuring the reliability of the transmission of the MAC CE.

[0104] <Example of the fifth aspect> In an embodiment of the present invention, a method for sending sidelink transmission is provided, and is described from the first terminal device side.

[0105] 8 is a diagram illustrating a method for transmitting sidelink transmission in an embodiment of the present invention. As shown in FIG. 8, the method includes the following steps (operations):

[0106] 801: A first terminal device sends a sidelink discontinuous reception command MAC CE to a second terminal device, the sidelink discontinuous reception command MAC CE having a set or predefined priority.

[0107] In the above mentioned embodiments, the sidelink discontinuous reception command MAC CE has a configured or predefined priority, which allows allocation of sidelink resources based on said priority or also enhances the reliability of the sidelink transmission by comparing it with the priority of other MAC CEs or logical channels or uplink transmissions.

[0108] In some embodiments, as shown in FIG. 8, the method may further include the following steps:

[0109] 802: The first terminal device transmits sidelink control information (SCI) to the second terminal device, the sidelink control information being used to indicate the priority of the sidelink discontinuous reception command MAC CE.

[0110] In the above-described embodiment, the first terminal device can indicate to the second terminal device in the SCI the priority of the SL data corresponding to the SCI, i.e., the priority of the sidelink discontinuous reception command MAC CE, thereby further enhancing the reliability of sidelink transmission.

[0111] In an embodiment of the present invention, the priority of the sidelink discontinuous reception command MAC CE indicated in the SCI or used in the UL and SL priority comparison process may be an integer between 1-8, e.g. 1 or 2, the smaller the value, the higher the priority.

[0112] In some embodiments, as shown in FIG. 8, the method may further include the following steps:

[0113] 803: The first terminal device determines whether to transmit a sidelink transmission or an uplink transmission using the set or predefined priority.

[0114] In the above embodiment, the first terminal device can use the above priority to determine whether to transmit a sidelink transmission or an uplink transmission.

[0115] It should be noted that the above FIG. 8 is for illustrative purposes only, but the present invention is not limited thereto. For example, the execution order of each operation may be appropriately adjusted, or some operations may be added or removed. Those skilled in the art are not limited to the description of the above FIG. 8, and may make appropriate modifications based on the above content.

[0116] In some embodiments, during the execution of the LCP process of the first terminal device, the priority of the sidelink discontinuous reception command MAC CE is lower than the priority of data of the sidelink service channel.

[0117] In the above embodiment, during the resource allocation process of the LCP, the priority of the sidelink discontinuous reception command MAC CE may be lower than the priority of data on a sidelink service channel (STCH), thereby ensuring that the sidelink service data is transmitted with priority over the sidelink discontinuous reception command MAC CE, so that the second terminal device can stop receiving the sidelink service data according to the received sidelink discontinuous reception command MAC CE after correctly receiving the sidelink service data.

[0118] In some embodiments, during the execution of the LCP process of the first terminal device, the priority of the sidelink discontinuous reception command MAC CE may be lower than the priority of data of a sidelink control channel and higher than the priority of a sidelink CSI report MAC CE, or may be lower than the priority of a sidelink CSI report MAC CE and higher than the priority of data of a sidelink service channel, but the present invention is not limited thereto. Note that, for the meaning of the priority of the sidelink CSI report MAC CE, reference may be made to the related art, and a detailed description thereof will be omitted here.

[0119] In some embodiments, the first terminal device may generate one MAC PDU when generating the sidelink discontinuous reception command MAC CE.

[0120] For example, the corresponding standard may be modified as follows:

[0121] [Table 3] The method according to the embodiment of the present invention can improve the reliability of sidelink transmission.

[0122] <Example of the sixth aspect> The inventor has discovered the following: The current standard contains the following description regarding the Buffer Size field in the SL-BSR MAC CE:

[0123] [Table 4] In the current specification, the condition for generating a SL-BSR MAC CE is that there is a UL-SCH resource for a new transmission, and the UL-SCH resource can accommodate the SL-BSR MAC CE plus its sub-header in the LCP process, i.e., a UL MAC PDU containing the SL-BSR MAC CE can be constructed.

[0124] However, as shown in Figure 9, when generating a SL-BSR MAC CE, there may be transmission or there may be no transmission on the sidelink, so the SL MAC PDU may be constructed or may not be constructed. Therefore, it is unclear whether the "MAC PDU" in the above-mentioned current standard refers to the UL MAC PDU or the SL MAC PDU.

[0125] If the "MAC PDU" in the above-mentioned standard refers to a UL MAC PDU, the sidelink buffer size has no relation to the construction of the UL MAC PDU or the UL LCP process, so if there is no transmission data on the sidelink, it will not cause the value of the sidelink buffer size field to become 0.

[0126] Furthermore, if the "MAC PDU" in the above-mentioned standard refers to the SL MAC PDU, if there is no transmission data on the sidelink, there is no SL MAC PDU, and if there is transmission data on the sidelink, the value of the SL-BSR buffer size can be affected only when the sidelink transmission and the SL-BSR transmission overlap in time and the terminal device has the ability to transmit the sidelink (SL) and the uplink (UL) simultaneously.

[0127] Therefore, the limitation of "after the MAC PDU has been built (i.e. after the logical channel prioritization procedure, which may result the value of the Buffer Size field to zero)" in the above-mentioned standard is not clear.

[0128] In view of the above problems, an embodiment of the present invention provides a method for generating a sidelink buffer status report, which is described from the first terminal device side, where the first terminal device performs sidelink transmission with a second terminal device. From the perspective of sidelink data transmission transmission, the first terminal device in the embodiment of the present invention is a transmitting device (Tx UE), and the second terminal device is a receiving device (Rx UE).

[0129] 10 is a diagram illustrating a method for generating a sidelink buffer status report according to an embodiment of the present invention. As shown in FIG 10, the method includes the following steps:

[0130] 1001: A first terminal device generates a sidelink buffer status report (SL-BSR), in which a buffer size field in the sidelink buffer status report indicates at least one of the following: the total amount of available data of all logical channels of the destination logical channel set after construction of a MAC PDU, the MAC PDU including a sidelink buffer status report MAC CE or the MAC PDU being an UL MAC PDU; the total amount of available data of all logical channels of the destination logical channel set when a MAC PDU is constructed, the MAC PDU including a sidelink buffer status report (MAC CE) or the MAC PDU being an UL MAC PDU; The total amount of available data in all logical channels of the destination logical channel pair at the time of generating the sidelink buffer status report MAC CE; The total amount of available data of all logical channels of the destination logical channel pair at the time of triggering the sidelink buffer status report MAC CE; The total amount of available data of all logical channels of the destination logical channel set after the sidelink MAC PDU is constructed, where the uplink transmission and the sidelink transmission overlap in time, and the first terminal device has the ability to perform uplink transmission and sidelink transmission simultaneously, where the buffer size field may cause the value to become zero after the sidelink LCP process.

[0131] 1002: The first terminal device sends the sidelink buffer status report to a network device.

[0132] In the above embodiment, by modifying the description of the buffer size field in the SL-BSR, it is advantageous for the network device to know the sidelink buffer status of the terminal device, and then, by performing adaptive scheduling, the QoS requirements of the sidelink service can be met.

[0133] In some embodiments, the buffer size field in the SL-BSR indicates the total amount of available data for all logical channels of the destination logical channel set after construction of a MAC PDU, the MAC PDU including a sidelink buffer status report MAC CE, or the MAC PDU is a UL MAC PDU.

[0134] For example, the corresponding standard may be modified as follows:

[0135] [Table 5] Alternatively, the corresponding standard may be modified as follows:

[0136] [Table 6] In some embodiments, the buffer size field in the SL-BSR indicates the total amount of available data for all logical channels of the destination logical channel set at the time of construction of the MAC PDU, the MAC PDU including a MAC CE for a sidelink buffer status report, or the MAC PDU is a UL MAC PDU.

[0137] For example, the corresponding standard may be modified as follows:

[0138] [Table 7] Alternatively, the corresponding standard may be modified as follows:

[0139] [Table 8] In some embodiments, the buffer size field in the SL-BSR indicates the total amount of available data for all logical channels of the destination logical channel set at the time of generation of the MAC CE of the sidelink buffer status report.

[0140] For example, the corresponding standard may be modified as follows:

[0141] [Table 9] In some embodiments, the buffer size field in the SL-BSR indicates the total amount of available data for all logical channels of the destination logical channel set at the time of triggering the MAC CE of a sidelink buffer status report.

[0142] For example, the corresponding standard may be modified as follows:

[0143] [Table 10] In some embodiments, the buffer size field in the SL-BSR indicates the total amount of available data of all logical channels of the destination logical channel set after the sidelink MAC PDU is constructed, where the uplink transmission and the sidelink transmission overlap in time and the first terminal device has the ability to perform uplink transmission and sidelink transmission simultaneously, where the value of the buffer size field may become zero after the sidelink LCP process.

[0144] For example, the corresponding standard may be modified as follows:

[0145] [Table 11] In the above embodiment, the total available data amount of all logical channels of the destination logical channel set can be obtained based on the data amount calculation process in technical standards 38.322 and 38.323.

[0146] The above-mentioned embodiments are provided to exemplify the embodiments of the present invention, but the present invention is not limited thereto. Furthermore, appropriate modifications may be made based on the above-mentioned embodiments. For example, the above-mentioned embodiments may be used alone, or a combination of the above-mentioned embodiments may be used. For example, the last labeling method may be combined with the previous four labeling methods.

[0147] The method according to the embodiment of the present invention clearly defines the behavior regarding the determination of the buffer size range in SL-BSR at the MAC layer of the terminal device, which is advantageous for the network device to know the sidelink buffer status of the terminal device, and can meet the QoS requirements of the sidelink service by performing adaptive scheduling.

[0148] <Example of the seventh aspect> In an embodiment of the present invention, an apparatus for triggering a sidelink discontinuous reception command is provided.

[0149] 11 is a diagram illustrating a trigger device for a sidelink discontinuous reception command according to an embodiment of the present invention. The device may be, for example, a terminal device (e.g., the above-mentioned first terminal device) or one or more components or assemblies disposed in the terminal device, and the description of the same contents as those in the embodiment of the first aspect is omitted here.

[0150] As shown in FIG. 11 , a sidelink discontinuous reception command triggering apparatus 1100 includes:

[0151] A triggering unit 1101: a MAC layer of the first terminal device triggers a sidelink discontinuous reception command when one of the following conditions is met: There is no data waiting to be transmitted for one destination or a source-destination pair or a logical channel corresponding to one PC5 5G quality of service indication (PC5 5G QoS identifier, PQI), or there is no data waiting to be transmitted for the current service period, or there is no data waiting to be transmitted for a given period in the past or when a timer expires; There is no MAC CE pending for a destination or source-destination pair, or there is no MAC CE pending for the current service period, or there is no MAC CE pending for the past predetermined period or when a timer expires; and The condition is that the upper layer of the first terminal device has indicated that the MAC layer of the first terminal device has no data waiting to be transmitted or has not had data waiting to be transmitted within a predetermined period of time.

[0152] In some embodiments, no data is pending for transmission in a logical channel corresponding to a destination or a source-destination pair or a PQI, referring to a buffer size of zero for the logical channel corresponding to a destination or a source-destination pair or a PQI.

[0153] In some embodiments, the current service periodicity includes at least one of the following: a sidelink service periodicity (if the sidelink service is a periodic service); a sidelink discontinuous reception (SL DRX cycle); a sidelink discontinuous reception on-duration timer (SL DRX on-duration timer) counting period; and a sidelink discontinuous reception inactivity timer (SL DRX inactivity timer) counting period.

[0154] In some embodiments, the timer comprises at least one of the following: a network device configured or predefined timer; a sidelink DRX on-duration timer; and a sidelink DRX inactivity timer.

[0155] Wherein, the SL DRX on-duration timer and / or the SL DRX inactivity timer may be set by the network device through system information or an RRC dedicated message, or may be preset.

[0156] In some embodiments, the time period includes at least one of the following: a network device configured or predefined time; a sidelink service cycle; a sidelink discontinuous reception cycle; a sidelink on-duration timer counting period; and a sidelink inactivity timer counting period.

[0157] Among them, the timing periods of the above-mentioned SL DRX cycle and / or SL DRX on-duration timer and / or SL DRX inactivity timer may be set by the network device via system information or an RRC dedicated message, may be preset, or may be set by the terminal device at the opposite end of the SL via an SL RRC message.

[0158] In some embodiments, the higher layer is one of the following: a V2X layer, a Non-Access Stratum (NAS), and a Radio Resource Control (RRC) layer.

[0159] In some embodiments, the MAC layer of the first terminal device generates a sidelink discontinuous reception command MAC CE when there is a sidelink resource, and transmits the sidelink discontinuous reception command MAC CE to the second terminal device through the sidelink resource. In this case, the apparatus 1100 according to the embodiment of the present invention may further include a generating unit (not shown) and a transmitting unit (not shown), where the generating unit generates the above-mentioned sidelink discontinuous reception command MAC CE, and the transmitting unit transmits the sidelink discontinuous reception command MAC CE to the second terminal device through the obtained sidelink resource.

[0160] In some embodiments, as shown in FIG. 11, the apparatus 1100 may further include:

[0161] A canceling unit 1102: a MAC layer of the first terminal device cancels a sidelink discontinuous reception command when one of the following conditions is met: for a destination or a source-destination pair or a PQI for which the sidelink discontinuous reception command was triggered, new data arrives on a logical channel corresponding to the destination or the source-destination pair or the PQI; another MAC CE is triggered for the destination or source-destination pair for which the sidelink discontinuous reception command was triggered; An upper layer of the first terminal device indicates to a MAC layer of the first terminal device that data has arrived; a medium access control element (MAC CE) of the sidelink discontinuous reception command transmitted on a sidelink; The first terminal device receives Hybrid Automatic Repeat Request (HARQ) feedback of the second terminal device transmission; and The condition is that the upper layer of the first terminal device has reconfigured the discontinuous reception setting.

[0162] In some embodiments, the above-mentioned other MAC CE may be another MAC CE to be transmitted on the sidelink, for example, a SL CSI reporting MAC CE.

[0163] In some embodiments, the higher layer is one of the following: a V2X layer, a Non-Access Stratum (NAS), and a Radio Resource Control (RRC) layer.

[0164] In some embodiments, the upper layer of the first terminal device reconfiguring the discontinuous reception setting includes the upper layer of the first terminal device reconfiguring the SL and / or DL ​​discontinuous reception setting for the destination or source-destination pair or PQI for which the sidelink discontinuous reception command was triggered.

[0165] In some embodiments, the discontinuous reception configuration includes a value of a SL on-duration timer, and / or a value of a SL inactivity timer, and / or a value of a SL retransmission timer, and / or a value of a SL DRX cycle, and / or an upper limit on the latency of CSI reporting, etc.

[0166] It should be noted that only the components or modules related to the present invention have been described above, but the present invention is not limited thereto. The device 1100 may further include other components or modules, and the specific contents of these components or modules can be referred to in the related art. In addition, each module in FIG. 11 may be implemented alone or in any combination, for example, the trigger unit 1101 and the cancel unit 1102 may be implemented alone, but the present invention is not limited thereto.

[0167] 11 shows only the connection relationships or signal directions between each component or module for convenience, but various related technologies such as bus connection may be adopted as understood by those skilled in the art. Each of the above-mentioned components or modules may be realized by hardware such as a processor, a memory, a transmitter (device), and a receiver (device), but the implementation of the present invention is not limited thereto.

[0168] The device according to the embodiment of the present invention allows the sidelink discontinuous reception command MAC CE to be triggered or cancelled at a correct time, thereby saving the power consumption of the receiving device or preventing an increase in delay of data transmission.

[0169] <Example of the eighth aspect> In an embodiment of the present invention, an apparatus for triggering a scheduling request in response to a sidelink discontinuous reception command is provided.

[0170] 12 is a diagram illustrating a triggering device for a scheduling request corresponding to a sidelink discontinuous reception command according to an embodiment of the present invention. The triggering device may be, for example, a terminal device (e.g., the above-mentioned first terminal device) or one or more components or assemblies disposed in the terminal device, and the description of the same contents as those in the embodiment of the second aspect is omitted here.

[0171] As shown in FIG. 12 , an apparatus 1200 for triggering a scheduling request corresponding to a sidelink discontinuous reception command includes:

[0172] A first triggering unit 1201: after triggering a sidelink discontinuous reception command, triggering a first scheduling request corresponding to the sidelink discontinuous reception command.

[0173] In the above embodiment, the first triggering unit 1201 triggers the first scheduling request corresponding to the sidelink discontinuous reception command when one of the following conditions is met: there are no sidelink resources for a new transmission; the sidelink resources for the new transmission cannot accommodate the sidelink discontinuous reception command MAC CE and its sub-header; and the sidelink resources for the new transmission cannot accommodate the sub-header of the sidelink discontinuous reception command MAC CE.

[0174] In some embodiments, as shown in FIG. 12, the apparatus 1200 may further include:

[0175] A second triggering unit 1202: after sending the sidelink discontinuous reception command, triggers a second scheduling request corresponding to the sidelink discontinuous reception command.

[0176] In some embodiments, the second triggering unit 1202 is capable of triggering the second scheduling request corresponding to the sidelink discontinuous reception command if one of the following conditions is satisfied: the sidelink resources for a new transmission can accommodate the sidelink discontinuous reception command MAC CE and its sub-header and all pending data; and the sidelink resources for a new transmission can accommodate the sidelink discontinuous reception command MAC CE sub-header and all pending data.

[0177] In some embodiments, as shown in FIG. 12, the apparatus 1200 may further include:

[0178] A receiving unit 1203: receiving configuration information of a network device sending, the configuration information including at least one SR configuration; A sending unit 1204: Sending a first scheduling request and / or a second scheduling request corresponding to the sidelink discontinuous reception command using at least one SR configuration of the at least one SR configuration.

[0179] Wherein, the sending unit 1204 may be integrated with the first trigger unit 1201 and / or the second trigger unit 1202 .

[0180] In some embodiments, the configuration information is included in RRC signaling.

[0181] In some embodiments, the SR configuration includes a PUCCH resource on a BWP (BWP), so that the transmitting unit 1204 can use the PUCCH resource to transmit the first scheduling request and / or the second scheduling request.

[0182] In some embodiments, the at least one SR setting is at least one of the following: an SR configuration configured by the network device for the sidelink discontinuous reception command MAC CE; an SR configuration configured by the network device for a sidelink logical channel; SR configuration configured by the network device for sidelink channel state information reporting MAC CE; and The SR setting is configured by the network device for a sidelink or uplink logical channel or MAC CE.

[0183] In some embodiments, the network device may configure different SR settings for the first scheduling request and the second scheduling request in the RRC reconfiguration message.

[0184] In some embodiments, as shown in FIG. 12, the apparatus 1200 may further include:

[0185] A canceling unit 1205: when a sidelink discontinuous reception command MAC CE is sent, cancels the first scheduling request corresponding to the sidelink discontinuous reception command.

[0186] It should be noted that only the components or modules related to the present invention have been described above, but the present invention is not limited thereto. The device 1200 may further include other components or modules, and the specific contents of these components or modules can be referred to in the related art. In addition, each module in FIG. 12 may be implemented alone or in any combination, for example, the first trigger unit 1201 and the second trigger unit 1202 may be implemented alone, but the present invention is not limited thereto.

[0187] For convenience, Fig. 12 shows only the connection relationships or signal directions between each component or module, but various related technologies such as bus connection may be adopted as understood by those skilled in the art. Each of the above-mentioned components or modules may be realized by hardware such as a processor, a memory, a transmitter, a receiver, etc., but the implementation of the present invention is not limited thereto.

[0188] The device according to the embodiment of the present invention allows the network device to notify in a timely manner that the sidelink resource allocation will be stopped, thereby avoiding the waste of sidelink resources.

[0189] <Example of the ninth aspect> In an embodiment of the present invention, a device for selecting a resource pool is provided.

[0190] 13 is a diagram illustrating a resource pool selection device in 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 or assemblies arranged in the terminal device, and the description of the same contents as those in the embodiment of the third aspect is omitted here.

[0191] In an embodiment of the present invention, the resource pool selection device is disposed in a first terminal device, the first terminal device performs sidelink transmission with a second terminal device, and the second terminal device uses SL DRX. As shown in Figure 13, the resource pool selection device 1300 includes:

[0192] Selection unit 1301: When a sidelink logical channel has data waiting to be transmitted and a sidelink discontinuous reception command is triggered, the selection unit 1301 selects a resource pool based on a HARQ feedback attribute of the sidelink logical channel or a HARQ feedback attribute of the sidelink discontinuous reception command according to the priority of the sidelink logical channel and the sidelink discontinuous reception command.

[0193] In some embodiments, if the priority of the sidelink logical channel is equal to or greater than the priority of the sidelink discontinuous reception command, the selection unit 1301 selects a resource pool in which a PSFCH resource is configured from a network device configured or pre-configured resource pool when a HARQ feedback attribute of the sidelink logical channel is set as enabled.

[0194] In some embodiments, if the priority of the sidelink discontinuous reception command is higher than the priority of the sidelink logical channel, the selection unit 1301 selects a resource pool in which a PSFCH resource is configured from a network device configured or pre-configured resource pool when a HARQ feedback attribute of the sidelink discontinuous reception command is set to enabled.

[0195] It should be noted that, although only the components or modules related to the present invention have been described above, the present invention is not limited thereto. The device 1300 may further include other components or modules, and the specific contents of these components or modules can be referred to in the related art.

[0196] Furthermore, each of the above components or modules may be realized by hardware such as a processor, a memory, a transmitter, and a receiver, but the implementation of the present invention is not limited to these.

[0197] The device according to the embodiment of the present invention can ensure the reliability of sidelink discontinuous reception command MAC CE transmission.

[0198] <Example of the tenth aspect> In an embodiment of the present invention, a logical channel selection device is provided.

[0199] Fig. 14 is a diagram showing a logical channel selection device in 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 parts or assemblies disposed in the terminal device, and description of the same contents as those in the example of Fig. 6 in the embodiment of the fourth aspect will be omitted here.

[0200] As shown in FIG. 14, the logical channel selection unit 1400 includes:

[0201] A determining unit 1401: for determining a sidelink resource for transmitting a sidelink transmission; and A selection unit 1402: selects a destination through a logical channel priority (LCP) process, the destination having a first MAC CE and / or a second logical channel or a second MAC CE with the highest priority among the first logical channels that satisfy a predetermined condition, and the first MAC CE satisfies the following condition: if a PSFCH is not configured for the sidelink resource, a HARQ feedback attribute of the MAC CE is set to disabled.

[0202] 15 is another diagram showing a logical channel selection 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 parts or assemblies disposed in the terminal device, and description of the same contents as those in the example of FIG. 7 in the embodiment of the fourth aspect will be omitted here.

[0203] As shown in FIG. 15, the logical channel selection device 1500 includes:

[0204] A determining unit 1501: for determining a sidelink resource for transmitting a sidelink transmission; and Selection unit 1502: when a PSFCH is configured for the sidelink resource and a HARQ feedback attribute corresponding to a highest priority logical channel or a sidelink discontinuous reception command MAC CE that satisfies a predetermined condition is set to enabled, the selection unit 1502 selects, in an LCP process, a logical channel or a sidelink discontinuous reception command MAC CE with a HARQ feedback attribute set to enabled; when a PSFCH is configured for the sidelink resource and a HARQ feedback attribute corresponding to a highest priority logical channel or a sidelink discontinuous reception command MAC CE that satisfies a predetermined condition is set to disabled, the selection unit 1502 selects, in an LCP process, a logical channel or a sidelink discontinuous reception command MAC CE with a HARQ feedback attribute set to disabled.

[0205] Although only the components or modules related to the present invention have been described above, the present invention is not limited thereto. The devices 1400 and 1500 may further include other components or modules, and the specific contents of these components or modules can be found in the related art.

[0206] 14 and 15 show only the connection relationships or signal directions between each component or module for convenience, but various related technologies such as bus connection may be adopted as understood by those skilled in the art. Each of the above-mentioned components or modules may be realized by hardware such as a processor, a memory, a transmitter, a receiver, etc., but the implementation of the present invention is not limited thereto.

[0207] The device according to the embodiment of the present invention can ensure the reliability of sidelink discontinuous reception command MAC CE transmission.

[0208] <Example of the eleventh aspect> In an embodiment of the present invention, a transmitting device for sidelink transmission is provided.

[0209] 16 is a diagram illustrating a transmitting device for sidelink transmission according to an embodiment of the present invention. The device may be, for example, a terminal device (e.g., the above-mentioned first terminal device) or one or more components or assemblies disposed in the terminal device, and the description of the same contents as those in the embodiment of the fifth aspect is omitted here.

[0210] As shown in FIG. 16, a transmitting apparatus 1600 for sidelink transmission includes:

[0211] A first sending unit 1601: sends a sidelink discontinuous reception command (SL DRX command) MAC CE to the second terminal device, where the sidelink discontinuous reception command MAC CE has a set or predefined priority.

[0212] In some embodiments, as shown in FIG. 16, the apparatus 1600 may further include:

[0213] A second sending unit 1602: Sends sidelink control information (SCI) to the second terminal device, where the sidelink control information indicates the priority of the sidelink discontinuous reception command MAC CE.

[0214] In some embodiments, as shown in FIG. 16, the apparatus 1600 may further include:

[0215] A determining unit 1603: determines whether to transmit a sidelink transmission or an uplink transmission according to the set or predefined priority.

[0216] In some embodiments, during execution of the LCP process of the first terminal device, the priority of the sidelink discontinuous reception command MAC CE is lower than the priority of sidelink service channel data.

[0217] In some embodiments, as shown in FIG. 16, the apparatus 1600 may further include:

[0218] Generating unit 1604: When generating the sidelink discontinuous reception command MAC CE, the generating unit 1604 generates one MAC PDU.

[0219] It should be noted that, although only the components or modules related to the present invention have been described above, the present invention is not limited thereto. The device 1600 may further include other components or modules, and the specific contents of these components or modules can be referred to in the related art.

[0220] For convenience, Fig. 16 shows only the connection relationships or signal directions between each component or module, but various related technologies such as bus connection may be adopted as understood by those skilled in the art. Each of the above-mentioned components or modules may be realized by hardware such as a processor, a memory, a transmitter, a receiver, etc., but the implementation of the present invention is not limited thereto.

[0221] The device according to the embodiment of the present invention can improve the reliability of sidelink transmission.

[0222] <Example of the twelfth aspect> In an embodiment of the present invention, an apparatus for generating a sidelink buffer status report is provided.

[0223] 17 is a diagram illustrating a sidelink buffer status report generating device according to an embodiment of the present invention. The device may be, for example, a terminal device (e.g., the above-mentioned first terminal device) or one or more components or assemblies disposed in the terminal device, and description of the same contents as those in the embodiment of the sixth aspect is omitted here.

[0224] As shown in FIG. 17, the sidelink buffer status report generating apparatus 1700 includes: a generating unit 1701 and a sending unit 1702.

[0225] A generating unit 1701: generates a sidelink buffer status report (SL-BSR), in which a buffer size field indicates at least one of the following: the total amount of available data of all logical channels of the destination logical channel set after construction of a MAC PDU, the MAC PDU including a sidelink buffer status report MAC CE or the MAC PDU being an UL MAC PDU; the total amount of available data of all logical channels of the destination logical channel set when a MAC PDU is constructed, the MAC PDU including a MAC CE of a sidelink buffer status report, or the MAC PDU being a UL MAC PDU; The total amount of available data in all logical channels of the destination logical channel pair at the time of generating the sidelink buffer status report MAC CE; the total amount of available data of all logical channels of the destination logical channel pair at the time of triggering the sidelink buffer status report MAC CE; and The total amount of available data of all logical channels of the destination logical channel set after the sidelink MAC PDU is constructed, where the uplink transmission and the sidelink transmission overlap in time, and the first terminal device has the ability to perform uplink transmission and sidelink transmission simultaneously, where the buffer size field may cause the value to become zero after the sidelink LCP process.

[0226] A sending unit 1702: sends the sidelink buffer status report to a network device.

[0227] Although only the components or modules related to the present invention have been described above, the present invention is not limited thereto. The device 1700 may further include other components or modules, and the specific contents of these components or modules can be referred to in the related art.

[0228] Furthermore, each of the above components or modules may be realized by hardware such as a processor, a memory, a transmitter, and a receiver, but the implementation of the present invention is not limited to these.

[0229] With the device according to the embodiment of the present invention, it is advantageous for the network device to know the buffer status of the sidelink of the terminal device, and the QoS requirements of the sidelink service can be met by performing adaptive scheduling.

[0230] <Example of the thirteenth aspect> An embodiment of the present invention further provides a communication system, and description of the same contents as those of the embodiments of the first to twelfth aspects will be omitted here.

[0231] In some embodiments, a communication system may include at least a first terminal device and a second terminal device, the first terminal device performs sidelink transmission with the second terminal device, and the second terminal device uses SL DRX, where the first terminal device is configured as a transmitting device to implement the method according to any one of the embodiments of the first to sixth aspects, and the second terminal device is configured as a receiving device to receive a sidelink transmission transmitted by the first terminal device at a SL DRX active time.

[0232] In some embodiments, the communication system may include at least a first terminal device, a second terminal device, and a network device, wherein the first terminal device is configured as a transmitting device to implement a method described in an embodiment of any one of the first to sixth aspects, the second terminal device is configured as a receiving device to receive a sidelink transmission of the first terminal device at the SL DRX active time, and the network device is configured to allocate sidelink resources to the first terminal device.

[0233] In a further embodiment of the present invention, a terminal device is provided.

[0234] Fig. 18 is a diagram illustrating a terminal device according to an embodiment of the present invention. As shown in Fig. 18, the terminal device 1800 may include a processor 1801 and a memory 1802, and the memory 1802 stores data and programs and is connected to the processor 1801. It should be noted that this diagram is merely an example, and other types of components may be used to supplement or replace the components to realize telecommunication functions or other functions.

[0235] For example, the processor 1801 may be configured to execute a program to implement a method according to any one of the embodiments of the first to sixth aspects.

[0236] As shown in Fig. 18, the terminal device 1800 may further include a communication module 1803, an input unit 1804, a display 1805, a power supply 1806, etc. Among them, the functions of these components are similar to those of the conventional technology, so detailed description thereof will be omitted here. It is not necessary for the terminal device 1800 to include all the components shown in Fig. 18. In addition, the terminal device 1800 may further include components not shown in Fig. 18, but the conventional technology can be referred to in this regard.

[0237] An embodiment of the present invention further provides a computer program, which, when executed on a terminal device, causes the terminal device to execute a method described in any one of the embodiments of the first to sixth aspects.

[0238] An embodiment of the present invention further provides a storage medium storing a computer program, wherein the computer program causes a terminal device to execute a method according to any one of the embodiments of the first to sixth aspects.

[0239] The above-mentioned devices and methods may be realized by software or hardware, or may be realized by a combination of hardware and software. The present invention further relates to a computer readable program, which, when executed by a logic component, causes the logic component to realize the above-mentioned devices or components, or causes the logic component to realize the various methods or steps described above. The logic component may be, for example, a Field Programmable Gate Array (FPGA), a microprocessor, a processor for use in a computer, etc. The present invention further relates to a storage medium, such as a hard disk, a magnetic disk, an optical hard disk, a DVD, a flash memory, etc., storing the above-mentioned program.

[0240] Additionally, one or more combinations of the functional blocks illustrated in the figures and / or one or more combinations of the functional blocks may be implemented as 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 component, a discrete gate or transistor logic component, a discrete hardware assembly, or any other suitable combination for performing the functions described herein. Also, one or more combinations of the functional blocks illustrated in the figures and / or one or more combinations of the functional blocks may be further configured as 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 communication with a DSP, or any other configuration.

[0241] Although the preferred embodiments of the present invention have been described above, the present invention is not limited to such embodiments, and any modifications to the present invention fall within the technical scope of the present invention as long as they do not depart from the spirit of the present invention.

[0242] Furthermore, with respect to the above-mentioned embodiments, the following supplementary notes are disclosed.

[0243] (Appendix 1) A method for triggering a sidelink discontinuous reception command (SL DRX command), which is applied to a first terminal device, the first terminal device performs sidelink transmission with a second terminal device, and the second terminal device uses sidelink discontinuous reception (SL DRX), wherein the method includes: The MAC layer of the first terminal device triggers a sidelink discontinuous reception command when one of the following conditions is met: There is no data waiting to be transmitted on a logical channel corresponding to a destination or a pair of source ID and destination ID or a PC5 5G QoS identifier (PQI), or there is no data waiting to be transmitted in the current service period, or there is no data waiting to be transmitted in a previous predetermined period or when a timer expires; There is no MAC CE pending for a destination or source-destination pair, or there is no MAC CE pending for the current service period, or there is no MAC CE pending for the past predetermined period or when a timer expires; and A method in which the condition is that an upper layer of the first terminal device indicates that the MAC layer of the first terminal device has no data waiting to be transmitted or has not had any data waiting to be transmitted within a specified period of time.

[0244] (Appendix 2) 2. The method according to claim 1, comprising: The method, wherein no data is waiting to be transmitted in a logical channel corresponding to one destination or source-destination pair or one PQI means that the buffer size of the logical channel corresponding to one destination or source-destination pair or one PQI is zero.

[0245] (Appendix 3) 2. The method according to claim 1, comprising: The current service period includes at least one of the following: Sidelink service cycle; Sidelink discontinuous reception cycle (SL DRX cycle); The period of the sidelink discontinuous reception on-duration timer (SL DRX on-duration timer); and A method for timing a sidelink discontinuous reception inactivity timer (SL DRX inactivity timer).

[0246] (Appendix 4) 2. The method according to claim 1, comprising: The timer includes at least one of the following: Network device settings or predefined timers; Sidelink discontinuous reception duration timer (SL DRX on-duration timer); and A sidelink discontinuous reception inactivity timer (SL DRX inactivity timer).

[0247] (Appendix 5) 2. The method according to claim 1, comprising: The time period includes at least one of the following: Network device settings or predefined times; Sidelink service cycle; Sidelink discontinuous reception cycle (SL DRX cycle); The period of the sidelink discontinuous reception on-duration timer (SL DRX on-duration timer); and A method for timing a sidelink discontinuous reception inactivity timer (SL DRX inactivity timer).

[0248] (Appendix 6) 2. The method according to claim 1, comprising: The method, wherein the higher layer is one of the following: a V2X layer, a non-access stratum (NAS), and a radio resource control (RRC) layer.

[0249] (Appendix 7) The method according to claim 1, further comprising: The MAC layer of the first terminal device cancels the sidelink discontinuous reception command when one of the following conditions is met: for a destination or a source-destination pair or a PQI for which the sidelink discontinuous reception command was triggered, new data arrives on a logical channel corresponding to the destination or the source-destination pair or the PQI; another MAC CE is triggered for the destination or source-destination pair for which the sidelink discontinuous reception command was triggered; An upper layer of the first terminal device indicates that data has arrived at a MAC layer of the first terminal device; a medium access control element (MAC CE) of the sidelink discontinuous reception command transmitted on a sidelink; The first terminal device receives Hybrid Automatic Repeat Request (HARQ) feedback of the second terminal device transmission; and A method, wherein the condition is that the upper layer of the first terminal device reconfigures the discontinuous reception setting.

[0250] (Appendix 8) 8. The method according to claim 7, The method, wherein the higher layer is one of the following: a V2X layer, a non-access stratum (NAS), and a radio resource control (RRC) layer.

[0251] (Appendix 9) 8. The method according to claim 7, The upper layer of the first terminal device resets the discontinuous reception setting, The method includes an upper layer of the first terminal device reconfiguring SL and / or DL ​​discontinuous reception settings for a destination or source-destination pair or PQI for which the sidelink discontinuous reception command was triggered.

[0252] (Appendix 7a) A method for canceling a sidelink discontinuous reception command (SL DRX command), which is applied to a first terminal device, the first terminal device performs sidelink transmission with a second terminal device, and the second terminal device uses sidelink discontinuous reception (SL DRX), wherein the method includes: The MAC layer of the first terminal device cancels a sidelink discontinuous reception command when one of the following conditions is satisfied: for a destination or a source-destination pair or a PQI for which the sidelink discontinuous reception command was triggered, new data arrives on a logical channel corresponding to the destination or the source-destination pair or the PQI; another MAC CE is triggered for the destination or source-destination pair for which the sidelink discontinuous reception command was triggered; An upper layer of the first terminal device indicates that data has arrived at a MAC layer of the first terminal device; a medium access control element (MAC CE) of the sidelink discontinuous reception command transmitted on a sidelink; The first terminal device receives Hybrid Automatic Repeat Request (HARQ) feedback of the second terminal device transmission; and A method, wherein the condition is that the upper layer of the first terminal device reconfigures the discontinuous reception setting.

[0253] (Appendix 8a) 7. The method according to claim 7a, comprising: The method, wherein the higher layer is one of the following: a V2X layer, a non-access stratum (NAS), and a radio resource control (RRC) layer.

[0254] (Appendix 9a) 7. The method according to claim 7a, comprising: The upper layer of the first terminal device resets the discontinuous reception setting, The method includes an upper layer of the first terminal device reconfiguring SL and / or DL ​​discontinuous reception settings for a destination or source-destination pair or PQI for which the sidelink discontinuous reception command was triggered.

[0255] (Appendix 10) A method for triggering a scheduling request corresponding to a sidelink discontinuous reception command, the method being applied to a first terminal device, the first terminal device performing sidelink transmission with a second terminal device, and the second terminal device using sidelink discontinuous reception (SL DRX), wherein the method comprises: and after the first terminal device triggers a sidelink discontinuous reception command, triggering a first scheduling request corresponding to the sidelink discontinuous reception command.

[0256] (Appendix 11) 11. The method of claim 10, further comprising: The first terminal device triggers the first scheduling request corresponding to the sidelink discontinuous reception command when one of the following conditions is met: No sidelink resources for new transmissions; The sidelink resources for the new transmission cannot accommodate the sidelink discontinuous reception command MAC CE and its subheader; and The condition is that the sidelink resources for the new transmission cannot accommodate a subheader of the sidelink discontinuous reception command MAC CE.

[0257] (Appendix 12) 11. The method of claim 10, further comprising: triggering, after the first terminal device has transmitted the sidelink discontinuous reception command, a second scheduling request corresponding to the sidelink discontinuous reception command.

[0258] (Appendix 13) 13. The method of claim 12, The first terminal device triggers the second scheduling request corresponding to the sidelink discontinuous reception command when one of the following conditions is met: The sidelink resources for the new transmission can accommodate the sidelink discontinuous reception command MAC CE and its subheader and all pending data; and the condition being that the sidelink resources for the new transmission can accommodate a sidelink discontinuous reception command MAC CE subheader and all pending data.

[0259] (Appendix 14) The method according to claim 10 or 12, further comprising: The first terminal device receives configuration information transmitted by a network device, the configuration information including at least one SR configuration; and The method includes the first terminal device transmitting a first scheduling request and / or a second scheduling request corresponding to the sidelink discontinuous reception command using at least one SR setting of the at least one SR setting.

[0260] (Appendix 15) 15. The method according to claim 14, The configuration information is included in RRC signaling.

[0261] (Appendix 16) 15. The method according to claim 14, The SR configuration includes a PUCCH resource on a BWP.

[0262] (Appendix 17) 15. The method according to claim 14, The at least one SR setting is at least one of the following: SR configuration configured by the network device for sidelink discontinuous reception command MAC CE; SR configuration configured by the network device for a sidelink logical channel; SR configuration configured by the network device for MAC CE of sidelink channel state information report; and A method in which the network device configures an SR setting for a sidelink or uplink logical channel or MAC CE.

[0263] (Appendix 18) 11. The method of claim 10, further comprising: canceling the first scheduling request corresponding to a sidelink discontinuous reception command MAC CE when the sidelink discontinuous reception command MAC CE is transmitted.

[0264] (Appendix 19) A resource pool selection method, which is applied to a first terminal device, the first terminal device performs sidelink transmission with a second terminal device, and the second terminal device uses sidelink discontinuous reception (SL DRX), wherein the method includes: when there is data waiting to be transmitted on a sidelink logical channel and a sidelink discontinuous reception command is triggered, the first terminal device selects a resource pool based on a HARQ feedback attribute of the sidelink logical channel or based on a HARQ feedback attribute of the sidelink discontinuous reception command according to a priority of the sidelink logical channel and the sidelink discontinuous reception command.

[0265] (Appendix 20) 20. The method of claim 19, a first terminal device selecting a resource pool in which a PSFCH resource is configured from a network device configured or pre-configured resource pool when a HARQ feedback attribute of the sidelink logical channel is set to enabled, when the priority of the sidelink logical channel is equal to or higher than the priority of the sidelink discontinuous reception command.

[0266] (Appendix 21) 20. The method of claim 19, a first terminal device, when a HARQ feedback attribute of the sidelink discontinuous reception command is set to enabled, selecting a resource pool in which a PSFCH resource is configured from a network device configured or pre-configured resource pool, when a priority of the sidelink discontinuous reception command is higher than a priority of the sidelink logical channel.

[0267] (Appendix 22) A logical channel selection method, which is applied to a first terminal device, the first terminal device performs sidelink transmission with a second terminal device, and the second terminal device uses sidelink discontinuous reception (SL DRX), wherein the method includes: determining sidelink resources for the first terminal device to transmit sidelink data; and The first terminal device selects a destination in a logical channel priority processing (LCP) process; The destination has a first MAC CE and / or a second logical channel or a second MAC CE with the highest priority among the first logical channels that satisfy a predetermined condition, and the first MAC CE satisfies the following condition, namely: A condition is that if a PSFCH is not configured for the sidelink resource, a HARQ feedback attribute of the MAC CE is set to disabled.

[0268] (Appendix 23) A logical channel selection method, which is applied to a first terminal device, the first terminal device performs sidelink transmission with a second terminal device, and the second terminal device uses sidelink discontinuous reception (SL DRX), wherein the method includes: determining sidelink resources for the first terminal device to transmit sidelink data; and a HARQ feedback attribute corresponding to a highest priority logical channel or a sidelink discontinuous reception command MAC CE that satisfies a predetermined condition is set to enabled, when a PSFCH is configured for the sidelink resources, and a HARQ feedback attribute corresponding to the highest priority logical channel or a sidelink discontinuous reception command MAC CE that satisfies a predetermined condition is set to enabled, when the first terminal device selects, in an LCP process, a logical channel or a sidelink discontinuous reception command MAC CE that has a HARQ feedback attribute set to enabled, and when a PSFCH is configured for the sidelink resources, and a HARQ feedback attribute corresponding to the highest priority logical channel or a sidelink discontinuous reception command MAC CE that satisfies a predetermined condition is set to disabled, when the first terminal device selects, in an LCP process, a logical channel or a sidelink discontinuous reception command MAC CE that has a HARQ feedback attribute set to disabled.

[0269] (Appendix 24) A method for transmitting sidelink transmission, which is applied to a first terminal device, the first terminal device performs sidelink transmission with a second terminal device, and the second terminal device uses sidelink discontinuous reception (SL DRX), wherein the method includes: The method includes the first terminal device sending a sidelink discontinuous reception command MAC CE (SL DRX command MAC CE) to the second terminal device, the sidelink discontinuous reception command MAC CE having a configured or predefined priority.

[0270] (Appendix 25) 25. The method of claim 24, further comprising: The method includes the first terminal device transmitting sidelink control information (SCI) to the second terminal device, the sidelink control information indicating a priority of the sidelink discontinuous reception command MAC CE.

[0271] (Appendix 26) 25. The method of claim 24, further comprising: A method comprising: the first terminal device determining whether to transmit a sidelink transmission or an uplink transmission using the set or predefined priority.

[0272] (Appendix 27) 25. The method according to claim 24, During the execution of the LCP process of the first terminal device, the priority of the sidelink discontinuous reception command MAC CE is lower than the priority of sidelink service channel data.

[0273] (Appendix 28) 25. The method of claim 24, further comprising: The method includes, when generating the sidelink discontinuous reception command MAC CE, the first terminal device generating one MAC PDU.

[0274] (Appendix 29) A method for generating a sidelink buffer status report, the method being applied to a first terminal device, the first terminal device performing sidelink transmission with a second terminal device, the method comprising: The first terminal device generates a sidelink buffer status report (SL-BSR); The buffer size field in the sidelink buffer status report indicates at least one of the following: the total amount of available data of all logical channels of the destination logical channel set after construction of a MAC PDU, the MAC PDU including a sidelink buffer status report MAC CE or the MAC PDU being an UL MAC PDU; the total amount of available data of all logical channels of the destination logical channel set when a MAC PDU is constructed, the MAC PDU including a MAC CE of a sidelink buffer status report, or the MAC PDU being a UL MAC PDU; The total amount of available data in all logical channels of the destination logical channel pair at the time of generating the sidelink buffer status report MAC CE; The total amount of available data of all logical channels of the destination logical channel pair at the time of triggering the sidelink buffer status report MAC CE; the total amount of available data of all logical channels of the address logical channel set after the sidelink MAC PDU is constructed, where the uplink transmission and the sidelink transmission overlap in time, and the first terminal device has the capability of performing uplink transmission and sidelink transmission simultaneously, where the buffer size field can be caused to become zero after the sidelink LCP process; The method further includes the first terminal device sending the sidelink buffer status report to a network device.

[0275] (Appendix 30) A terminal device, A memory and a processor are included, The storage device stores a computer program, A terminal device, wherein the processor is configured to execute the computer program to implement the method according to any one of claims 1 to 29.

[0276] (Appendix 31) 1. A communication system comprising: A first terminal device and a second terminal device, the first terminal device and the second terminal device perform sidelink transmission; The second terminal device uses sidelink discontinuous reception (SL DRX), A communication system, wherein the first terminal device is configured to perform a method according to any one of claims 1 to 29.

[0277] (Appendix 32) 32. The communication system of claim 31, The communication system further includes a network device; The network device is configured to allocate sidelink resources to the first terminal device.

Claims

1. An apparatus for triggering transmission of a scheduling request corresponding to a sidelink discontinuous reception (SL DRX) command MAC CE, the apparatus being disposed in a first terminal device, the apparatus comprising: the first terminal device performs sidelink transmission with the second terminal device; the second terminal device uses sidelink discontinuous reception; The apparatus comprises: a first triggering unit for triggering transmission of a first scheduling request corresponding to a sidelink discontinuous reception command MAC CE after the first terminal device triggers transmission of the sidelink discontinuous reception command MAC CE.

2. 2. The apparatus of claim 1, The first trigger unit is There are no sidelink resources for new transmissions; and The sidelink resources for the new transmission cannot accommodate the sidelink discontinuous reception command (MAC CE) and its subheader. triggering transmission of the first scheduling request corresponding to the sidelink discontinuous reception command MAC CE when one of the following conditions is satisfied:

3. 2. The apparatus of claim 1, further comprising: a second trigger unit for triggering transmission of a second scheduling request corresponding to the sidelink discontinuous reception command MAC CE after the first terminal device has transmitted the sidelink discontinuous reception command MAC CE.

4. 4. The apparatus of claim 3, The second trigger unit is The sidelink resources for the new transmission can accommodate the sidelink discontinuous reception command MAC CE and its subheaders and all pending data; and The sidelink resources for the new transmission can accommodate the subheader of the sidelink discontinuous reception command (MAC CE) and all pending data. triggering transmission of the second scheduling request corresponding to the sidelink discontinuous reception command MAC CE when one of the following conditions is satisfied:

5. 2. The apparatus of claim 1, further comprising: A receiving unit for receiving configuration information transmitted by a network device, the configuration information including at least one SR setting; and a transmitting unit for transmitting the first scheduling request corresponding to the sidelink discontinuous reception command MAC CE using at least one SR configuration of the at least one SR configuration.

6. 6. The apparatus of claim 5, The configuration information is included in RRC signaling.

7. 6. The apparatus of claim 5, The SR configuration includes a PUCCH resource on a BandWidth Part (BWP).

8. 6. The apparatus of claim 5, The at least one SR configuration is an SR configuration configured by the network device for sidelink channel state information reporting.

9. 2. The apparatus of claim 1, further comprising: a cancellation unit for canceling transmission of the first scheduling request corresponding to the sidelink discontinuous reception command MAC CE when the sidelink discontinuous reception command MAC CE is transmitted.

10. The apparatus of claim 1, further comprising:

2. An apparatus comprising: a first transmitting unit for transmitting the sidelink discontinuous reception command MAC CE to the second terminal device, wherein a priority of the sidelink discontinuous reception command MAC CE is predefined.

11. 11. The apparatus of claim 10, During an LCP process of the first terminal device, a priority of the sidelink discontinuous reception command MAC CE is lower than a priority of a sidelink CSI report MAC CE and higher than a priority of data of a sidelink traffic channel.

12. 11. The apparatus of claim 10, further comprising: a generating unit configured to generate one MAC PDU when the sidelink discontinuous reception command (MAC CE) is generated for a PSSCH transmission.

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