Method and apparatus for configuring alignment-sidelink DRX

Abstract

This application relates to a method and apparatus for aligning sidelink DRX configuration. One embodiment of this application provides a method for sidelink communication, comprising: receiving from a second user equipment (UE) a second request for one or more sidelink intermittent reception (DRX) configurations, wherein the second request includes auxiliary information; and transmitting from a first UE the one or more sidelink DRX configurations determined based on the auxiliary information to the second UE.

Description

Technical Field

[0001] This application relates to wireless communication technology, and more specifically, to a method and apparatus for align-side-link (SL) intermittent reception (DRX) configuration. Background Technology

[0002] In 3GPP (3rd Generation Partnership Project) Release 16, NR (New Radio) sidelinks assumed that the UE (User Equipment) was always on during sidelink communication. In other words, the sidelink only considered UEs installed in vehicles with sufficient battery capacity. In Release 17, to conserve power for battery-constrained UEs, DRX configuration, which includes parameters such as on duration, off duration, and wake-up time, was introduced into sidelink communication.

[0003] Therefore, it is desirable to provide a solution for aligning DRX configurations in sidelink communication between UEs. Summary of the Invention

[0004] The goal is to provide a solution for aligning DRX configurations in sidelink communication.

[0005] One embodiment of this application provides a method for sidelink communication, comprising: receiving from a second user equipment (UE) a second request for one or more sidelink intermittent reception (DRX) configurations, wherein the second request includes auxiliary information; and transmitting from a first UE the one or more sidelink DRX configurations determined based on the auxiliary information to the second UE.

[0006] Another embodiment of this application provides a method for sidelink communication, comprising: receiving a first request from a first user equipment (UE) for one or more sidelink DRX configurations, wherein the first request includes auxiliary information from a second UE; and determining a response by a first base station (BS) based on the auxiliary information.

[0007] Another embodiment of this application provides an apparatus comprising: a non-transitory computer-readable medium having computer-executable instructions stored thereon; a receiving circuitry; a transmitting circuitry; and one or more processors coupled to the non-transitory computer-readable medium, wherein the computer-executable instructions cause the one or more processors to implement the sidelink communication method, the method comprising: receiving from a second user equipment (UE) a second request for one or more sidelink intermittent reception (DRX) configurations, wherein the second request includes auxiliary information; and transmitting from the first UE one or more sidelink DRX configurations determined based on the auxiliary information to the second UE.

[0008] Another embodiment of this application provides an apparatus comprising: a non-transitory computer-readable medium having computer-executable instructions stored thereon; a receiving circuitry; a transmitting circuitry; and one or more processors coupled to the non-transitory computer-readable medium, wherein the computer-executable instructions cause the one or more processors to implement the sidelink communication method, the method comprising: receiving from a first user equipment (UE) a first request for sidelink DRX configuration of the one or more sidelinks, wherein the first request includes auxiliary information from a second UE; and determining a response by a first base station (BS) based on the auxiliary information. Attached Figure Description

[0009] Figure 1 A flowchart 100 is depicting a method for configuring alignment-side link DRX according to a preferred embodiment of the present disclosure.

[0010] Figure 2A A flowchart 200A is depicted illustrating a method for aligning sidelink DRX configuration according to a preferred embodiment of the present disclosure.

[0011] Figure 2B A flowchart 200B is shown illustrating a method for alignment sidelink DRX configuration according to a preferred embodiment of the present disclosure.

[0012] Figure 3 A flowchart 300 is depicting a method for configuring alignment-side link DRX according to a preferred embodiment of the present disclosure.

[0013] Figure 4 A method performed by a UE according to a preferred embodiment of the present disclosure is described.

[0014] Figure 5 A method performed by a BS according to a preferred embodiment of the present disclosure is described.

[0015] Figure 6 A block diagram depicting a UE according to an embodiment of the present disclosure.

[0016] Figure 7 A block diagram depicting a BS according to an embodiment of the present disclosure. Detailed Implementation

[0017] The detailed description of the accompanying drawings is intended to illustrate the presently preferred embodiments of the invention and is not intended to represent the only form in which the invention can be practiced. It should be understood that the same or equivalent functions can be accomplished through different embodiments that are intended to be covered by the spirit and scope of the invention.

[0018] This embodiment provides a method and apparatus for aligned sidelink DRX configuration. To facilitate understanding, embodiments are provided under specific network architectures and new service scenarios (e.g., 3GPP 5G, 3GPP LTE version 8, etc.). Those skilled in the art will appreciate that the embodiments in this disclosure can also be applied to similar technical problems as network architectures and new service scenarios develop.

[0019] Version 16 aligns the sidelink radio bearer (SLRB) parameters between peer UEs for unicast transmissions in NR V2X (vehicle-to-everything) communications. Specifically, for sidelink unicast, the initiating UE needs to align the following SLRB configurations with the peer UE: 1) a network-configured or pre-configured SLRB configuration containing SLRB parameters that are only related to transmission; and 2) SLRB parameters that are related to both transmission and reception. For sidelink unicast, UEs are not allowed to configure "transmission-only SLRB parameters" for peers in the sidelink via PC5 RRC messages.

[0020] As can be seen, the SLRB configuration that needs to be aligned is configured by the network (e.g., base station (BS)) or pre-configured, such as pre-configured. Then, the initiating UE notifies the peer UE of these configurations.

[0021] Furthermore, power saving enables UEs with battery limitations to perform sidelink operations in an energy-efficient manner. NR sidelink communication in version 16 is performed based on the assumption that the UE is "always on," for example, focusing only on UEs installed in vehicles with sufficient battery capacity.

[0022] In version 17, power-saving solutions are required for vulnerable road users (VRUs) in V2X use cases and for UEs in public safety and commercial use cases where UE power consumption needs to be minimized.

[0023] Therefore, one of the power-saving objectives in version 17 is for sidelink DRX, and the corresponding scope of work is as follows: for sidelink DRX used for broadcast, multicast and unicast, 1) define the on-time and off-time of the sidelink and specify the corresponding UE procedures; 2) specify the mechanism for aligning the sidelink DRX wake-up time between UEs communicating with each other; and 3) specify the mechanism for aligning the sidelink DRX wake-up time with the Uu DRX wake-up time of UEs within the coverage area.

[0024] DRX configuration between UEs in the alignment sidelink needs to be optimized to ensure no data transmission is missed at the receiver side, while also minimizing receiver power consumption. Additionally, DRX and Uu configurations for UEs in alignment sidelink communication also need to be configured.

[0025] Currently, NR V2X fully incorporates multicast, unicast communication, and broadcast transmission, and this disclosure focuses on DRX alignment for unicast.

[0026] Specifically, the purpose of this disclosure is to configure the sidelink DRX between UEs that are aligned to communicate with each other for unicast transmission, and if the UE is within the coverage area of ​​the BS, then the aligned sidelink DRX configuration is the same as the Uu DRX configuration.

[0027] In this disclosure, the sidelink DRX configuration may include the following parameters:

[0028] i) On-time duration, which indicates the duration for which the UE is in an "on" or "wake-up" state and is controlled by a timer. The on-time duration is a parameter derived from the SFN (System Frame Number), DFN (Direct Frame Number), or resource pool on the sidelink.

[0029] ii) Start offset of start duration: The start offset of start duration defines the starting position of start duration on the side link.

[0030] iii) Inactive Time: Inactive time refers to the period during which the UE is inactive and controlled by the timer. During inactive time, new data transmission on the side link ends.

[0031] iv) HARQ RTT (Hybrid Automatic Repeat Request Round Trip Time): Controlled by a timer and enabled when HARQ-based retransmission is enabled on the side link.

[0032] v) HARQ retransmission time: Controlled by a timer and used to monitor HARQ retransmissions on the side link.

[0033] ⅵ) Next Reserved Time: Controlled by a timer, this parameter monitors the next transmission on the side link.

[0034] vii) Activity Time / Wake-up Time: During the activity time or wake-up time, the UE actively monitors the side link for data transmission, and this is controlled by a timer.

[0035] Sidelink DRX configuration involves multiple timers and may further include other parameters, and this disclosure is not intended to limit the types of parameters.

[0036] Sidelink DRX configurations for sidelink UEs can be configured by the network or pre-configured. For example, sidelink DRX configurations can be broadcast in system information for sidelink communication, such as in a System Information Block (SIB); sidelink DRX configurations can be transmitted for a specific sidelink UE in dedicated RRC signaling; or sidelink DRX configurations can be pre-configured. For example, a sidelink UE may have a SIM (Subscriber Identity Module) card containing a pre-configured sidelink DRX configuration.

[0037] Sidelink DRX configuration can be targeted to a specific destination ID (identifier), meaning that the sidelink DRX configuration is for a specific service. Several embodiments regarding associated sidelink DRX configurations are presented in this disclosure as follows:

[0038] i) A sidelink DRX configuration is associated with an SLRB configuration and an SLRB ID.

[0039] ii) The sidelink DRX configuration is associated with a Quality of Service (QoS) flow and a QoS flow ID;

[0040] iii) The side-link DRX configuration is associated with a PQI (PC5 QoS index).

[0041] iv) The sidelink DRX configuration is associated with a logical channel configuration and a logical channel ID.

[0042] v) The sidelink DRX configuration is associated with a unicast link and a unicast link ID, which can be a combination of the sidelink source ID and the sidelink destination ID.

[0043] ⅵ) The sidelink DRX configuration is associated with a destination ID.

[0044] (vii) The side-link DRX configuration is associated with a source ID.

[0045] When multiple services communicate on a sidelink unicast link—for example, when a sidelink UE has multiple SLRBs, QoS flows, logical channels, or destination IDs, and the sidelink DRX configuration is different for different services—the UE is woken up to monitor sidelink communication during the period when at least one DRX configuration is active, according to the sidelink DRX procedure. In other words, the UE is woken up to monitor sidelink communication if at least one of the following timers—a duration timer, a retransmission timer, an inactivity timer, a next reserved timer, etc.—is running. If the number of services is large enough, the UE can remain awake to monitor sidelink communication.

[0046] Alternatively, sidelink DRX configuration can be targeted at a specific resource pool. For example, if the sidelink DRX configuration is configured in a pre-configuration or broadcast in an SIB message, then the sidelink DRX configuration is associated with at least one resource pool configuration and a resource pool ID. In this case, the sidelink DRX configuration depends on the resource pool configuration; for example, the duration of the sidelink DRX activation and the start position of the activation duration are defined as an offset from the start position of the corresponding resource pool. For a specific resource pool, a subset of the resource pool resources can be configured as active for sidelink unicast transmission.

[0047] Furthermore, configurations can be associated with both a specific destination ID and a resource pool simultaneously. That is, for a specific resource pool, multiple sets of DRX parameter configurations can be configured to be associated with multiple services.

[0048] However, if the UE is configured with a specific resource pool and also has a sidelink DRX configuration, then these two configurations are configured separately. This means that the two configurations can be aligned with each other or not aligned with each other. If the resource pool and DRX configuration are not aligned, the UE will not enter an active period or activate any timers. In other words, the UE only performs DRX operations in the time domain when a configured resource pool exists, and the UE only enters the on-duration, active period, or wake-up with the resources configured in the resource pool.

[0049] Figure 1 A flowchart 100 depicts a method for configuring alignment-side link DRX according to a preferred embodiment of the present disclosure. Figure 1 In this context, UE1 represents the initiating UE that initiates sidelink communication, and UE2 is the peer UE that UE1 wants to communicate with.

[0050] In step 101, UE2 sends a request to UE1 requesting sidelink DRX configuration. The request can be transmitted to UE1 during or after the establishment of a unicast connection between UE1 and UE2. In other words, UE2 can notify UE1 of the sidelink DRX configuration request during or after PC5-RRC signaling for radio configuration or capability messages. The request from UE2 contains several different types of auxiliary information.

[0051] In one embodiment, the request from UE2 contains some information about UE2 itself. For example, UE2 may use a bit to indicate to UE1 that UE2 is a power-sensitive UE; UE2 may use a bit to indicate to UE1 that UE2 requests low-power data transmission; or UE2 may use a bit to indicate its request for sidelink configuration.

[0052] In another embodiment, the request from UE2 includes information about the Uu DRX configuration, relating to the DRX configuration between UE2 and its serving base station (BS) (hereinafter referred to as BS2). Under these conditions, UE2 is within the coverage area of ​​BS2, and UE1 can use the Uu DRX configuration from UE2 to determine the sidelink DRX configuration. This Uu DRX configuration can be a DRX configuration in RRC (Radio Resource Control) CONNECTED mode, or it can be a DRX configuration in IDLE or INACTIVE mode. The auxiliary information may also include service mode and UE2's capability information.

[0053] In yet another embodiment, the request from UE2 includes information about BS2 ( Figure 1Some information (not shown in the text). For example, the ID of BS2, or the ID of the cell serving UE2.

[0054] In step 102, UE1 checks the existing sidelink DRX configuration, or the initial sidelink DRX configuration, which may be broadcast to UE1 in the SIB, transmitted in UE1's dedicated RRC signaling, or pre-configured as discussed above. Based on auxiliary information from UE2, such as service mode, Uu DRX configuration, UE2's capabilities, etc., UE1 determines that the existing sidelink DRX configuration meets UE2's requirements, and then in step 103, UE1 sends the sidelink DRX configuration to UE2.

[0055] In another embodiment, if UE1 is not within the coverage of the serving BS, then UE1 will also check the existing sidelink DRX configuration and send the existing sidelink DRX configuration to UE2 in step 103.

[0056] Figure 2A A flowchart 200A is depicted illustrating a method for aligning sidelink DRX configuration according to a preferred embodiment of the present disclosure. Figure 2B Description and Explanation Figure 2A The flowchart in 200B is similar to the method described in [the previous text]. Figure 2A and 2B In this context, UE1 represents the initiating UE that initiates sidelink communication, UE2 is the peer UE that UE1 wishes to communicate with, BS is the serving BS of UE1, and BS2 is the serving BS of UE2. If UE1 and UE2 are in the same cell, then BS1 and BS2 are the same BS.

[0057] Figure 2A Step 201 and Figure 1 The steps are the same as in step 101, and details are omitted here.

[0058] In step 202, after checking the existing DRX configuration, UE1 determines that the existing DRX configuration cannot meet the requirements of UE2, and UE1 is also within the coverage of BS1. Therefore, UE1 decides to request the sidelink DRX configuration from BS1.

[0059] In step 203, UE1 sends a sidelink DRX configuration request message to BS1. If UE1 is in IDLE or INACTIVE mode, UE1 must trigger the RRC connection setup procedure with BS1 before transmitting the sidelink DRX configuration request message to BS1. If UE1 is in RRC connection mode, meaning that UE1 has already established an RRC connection with BS1, then UE1 can send the sidelink DRX configuration request message to BS1.

[0060] UE1 may include auxiliary information from UE2 in the request message. As discussed above, for example, the auxiliary information from UE2 may include information about UE2 itself, the Uu DRX configuration between UE2 and BS2, information about BS2, and / or service mode and UE capability information. This auxiliary information from UE2 can help BS1 determine the sidelink DRX configuration to be transmitted to UE1. For example, BS1 may configure the sidelink DRX configuration to align the sidelink wake-up time with the Uu wake-up time of UE2.

[0061] In step 204, BS1 determines the sidelink DRX configuration and transmits it to UE1. Depending on the different auxiliary information included in the request, BS1 performs different operations to determine the sidelink DRX configuration to be transmitted to UE1.

[0062] In one embodiment, the auxiliary information included in the request is the Uu DRX configuration of UE2 and / or the service mode on the sidelink. Taking this information into account, BS1 may send different responses. For example, BS1 may use a bit in the response to indicate to UE1 that the Uu DRX configuration of UE2 can be reused. For another example, BS1 may send differential signaling based on the Uu DRX configuration to modify a portion of the Uu DRX parameters for sidelink DRX configuration purposes. When UE1 receives the differential signaling, UE1 will modify the Uu DRX configuration of UE2 based on the differential signaling and use the modified Uu DRX configuration as the sidelink DRX configuration, then send the modified Uu DRX configuration to UE2 in step 205. For yet another example, BS1 may configure a new set of sidelink DRX parameters and transmit the sidelink DRX configuration containing the new set of sidelink DRX parameters to UE1.

[0063] In another embodiment, the auxiliary information included in the request from UE2 in step 201 is information about BS2, the cell ID of UE2, and / or information about whether Uu DRX is configured. Figure 2B As shown, upon receiving this request, in step 206, using information from BS2, BS1 can communicate directly with BS2, for example via the Xn interface, and request information about UE2's Uu DRX configuration. Then, in step 207, BS2 sends UE2's Uu DRX configuration to BS1, and BS1 configures the sidelink DRX configuration taking UE2's Uu DRX configuration into account. In step 208, BS1 sends a response to UE1, which may instruct UE1 to reuse UE2's UuDRX configuration, or differential signaling, or a new sidelink DRX configuration as described above.

[0064] Or, in Figure 2BIn step 206, BS1 may indicate the sidelink DRX configuration to BS2. Then, BS2 may update the sidelink DRX configuration according to UE2's Uu DRX configuration and indicate the updated sidelink DRX configuration to UE2.

[0065] Following the steps above, configure the sidelink DRX and Uu DRX for UE2.

[0066] Figure 3 A flowchart 300 is depicting a method for configuring alignment-side link DRX according to a preferred embodiment of the present disclosure. Figure 3 The method steps described occur when UE2 is within the coverage area of ​​BS2 and is in RRC CONNECTED mode. In step 301, after receiving a sidelink DRX configuration or an update to the sidelink DRX configuration from UE1, UE2 reports the sidelink DRX configuration to BS2. UE2 can report the sidelink DRX configuration using the sidelink DRX configuration included in the UE assistance information.

[0067] In step 302, after receiving the sidelink DRX configuration from UE2, BS2 may update or configure UE2's UuDRX configuration and transmit it to UE2. If the UuDRX configuration does not need to be updated, then BS2 does not need to transmit the UuDRX configuration to UE2. In this way, the sidelink DRX configuration and UuDRX configuration of UE2 are aligned.

[0068] Figure 4 This invention describes a method for wireless communication performed by a UE according to a preferred embodiment of the present disclosure.

[0069] In step 401, UE1 receives a second request from UE2 for one or more sidelink DRX configurations, and the second request contains auxiliary information. In step 402, UE1 transmits the one or more sidelink DRX configurations determined based on the auxiliary information to UE2. This method also... Figure 1 As shown in the diagram. UE2 can send a second request during or after the establishment of a unicast connection between UE1 and UE2.

[0070] UE1 is configured with multiple initial sidelink DRX configurations, either broadcast in the SIB, transmitted via dedicated RRC signaling, or pre-configured. For example, a sidelink DRX configuration may include at least one of the following parameters: on-duration duration; start offset of on-duration duration; inactive time; HARQ RTT time; HARQ retransmission time; next reservation time; and active time. Furthermore, a sidelink DRX configuration is associated with at least one of the following parameters: an SLRB configuration and an SLRB ID; a QoS flow and a QoS flow ID; a PQI; a logical channel configuration and a logical channel ID; a unicast link and a unicast link ID; a destination ID; and a source ID.

[0071] In one embodiment, UE1 may have multiple destination IDs, which means that UE1 has multiple services at the same time, and UE1 enters an "on" mode or a "wake-up" mode to monitor sidelink communication during each on duration associated with each destination ID.

[0072] In another embodiment, each sidelink DRX configuration is associated with a resource pool configuration and a resource pool ID. When a sidelink DRX configuration is misaligned with its corresponding resource pool configuration, UE2 will not enter "on" mode or "wake-up" mode during the on duration associated with the sidelink DRX configuration.

[0073] The auxiliary information from UE2 contains several types of parameters, such as requirements of UE2 itself, for example, UE2 being power sensitive. The auxiliary information may be the Uu DRX configuration between UE2 and BS2, including the Uu DRX configuration in RRC-CONNECTED mode or the DRX configuration in IDLE / INACTIVE mode.

[0074] In another embodiment, when UE1 determines that the initial sidelink DRX configuration is sufficient to meet the requirements of UE2, or when UE1 is outside the coverage area of ​​the BS, UE1 further transmits one or more initial sidelink DRX configurations to UE2. When UE1 is outside the coverage area of ​​the BS, since UE1 cannot reach the BS to obtain additional sidelink DRX configurations, UE1 has no choice but to send the initial sidelink DRX configurations.

[0075] Alternatively, when UE1 is within the coverage area of ​​BS1 and the initial sidelink DRX configuration does not meet the requirements of UE2, UE1 will transmit a request for one or more sidelink DRX configurations to BS1, and determine one or more sidelink DRX configurations based on the response from BS1. Before sending the request, if UE1 is in IDLE mode, it must initiate an RRC connection with BS1. The response from BS1 has different types: 1) the response indicates one or more new sidelink DRX configurations; 2) the response indicates that UE1 uses UE2's Uu DRX configuration; and 3) the response indicates that UE1 uses a portion of UE2's Uu DRX configuration and updates another portion of UE2's UuDRX configuration.

[0076] In another embodiment, the assistance information from UE2 includes information about BS2, UE2's cell ID, and / or whether Uu DRX is configured. Upon receiving this type of assistance information, BS1 can communicate directly with BS2 and request UE2's Uu DRX configuration from BS2, then determine a response based on the received Uu DRX configuration. After determination, BS1 transmits the response to UE1. The response also has the different types discussed above.

[0077] In one embodiment, after receiving the sidelink DRX configuration from UE1, UE2 reports the sidelink DRX configuration to BS2. Then, BS2 updates UE2's Uu configuration based on the sidelink DRX configuration.

[0078] Figure 5 This section describes a method for wireless communication performed by a BS according to a preferred embodiment of the present disclosure. In step 501, BS1 receives a request from UE1 for the configuration of one or more sidelink DRXs, and the request includes auxiliary information from UE2. In step 502, BS1 determines a response based on the auxiliary information.

[0079] The auxiliary information from UE2 contains several types of parameters, such as requirements of UE2 itself, for example, UE2 being power sensitive. The auxiliary information may be the Uu DRX configuration between UE2 and BS2, including the Uu DRX configuration in RRC-CONNECTED mode or the DRX configuration in IDLE / INACTIVE mode.

[0080] Taking into account the auxiliary information of UE2, BS1 may send a response, for example: 1) the response indicates one or more new sidelink DRX configurations; 2) the response indicates that UE1 uses the Uu DRX configuration of UE2; and 3) the response indicates that UE1 uses a part of the Uu DRX configuration of UE2 and updates another part of the Uu DRX configuration of UE2.

[0081] The assistance information from UE2 may further include information from BS2, UE2's cell ID, and / or whether Uu DRX is configured. Upon receiving the assistance information, BS1 communicates with BS2 and requests UE2's Uu DRX configuration from BS2, then determines a response based on the received Uu DRX configuration. After determination, BS1 transmits the response to UE1.

[0082] Figure 6 This illustration shows block diagrams of a UE according to some embodiments of the present disclosure. The UE may include a receiving circuitry system, a processor, and a transmitting circuitry system. In one embodiment, the UE may include: a non-transitory computer-readable medium storing computer-executable instructions thereon; a receiving circuitry system; a transmitting circuitry system; and a processor coupled to the non-transitory computer-readable medium, the receiving circuitry system, and the transmitting circuitry system. The computer-executable instructions may be programmed to implement methods (e.g., ...) using the receiving circuitry system, the transmitting circuitry system, and the processor. Figure 4 (Methods in the text).

[0083] Figure 7 This illustration shows block diagrams of a BS according to some embodiments of the present disclosure. The BS may include a receiving circuitry system, a processor, and a transmitting circuitry system. In one embodiment, the BS may include: a non-transitory computer-readable medium having computer-executable instructions stored thereon; a receiving circuitry system; a transmitting circuitry system; and a processor coupled to the non-transitory computer-readable medium, the receiving circuitry system, and the transmitting circuitry system. The computer-executable instructions may be programmed to implement methods (e.g., ...) using the receiving circuitry system, the transmitting circuitry system, and the processor. Figure 5 (Methods in the text).

[0084] The methods disclosed herein can be implemented on a programmable processor. However, the controller, flowchart, and modules can also be implemented on general-purpose or special-purpose computers, programmable microprocessors or microcontrollers and peripheral integrated circuit elements, integrated circuits, hardware electronic or logic circuits (e.g., discrete element circuits), programmable logic devices, or the like. Generally, any device having a finite state machine capable of implementing the flowcharts shown in the figures can be used to implement the processing functions of this disclosure.

[0085] While this disclosure has been described with reference to specific embodiments thereof, it will be apparent to those skilled in the art that many alternatives, modifications, and variations will be readily apparent. For example, various components of the embodiments may be interchanged, added, or substituted in other embodiments. Moreover, not all elements shown in each figure are essential to the operation of the disclosed embodiments. For example, those skilled in the art will be able to make and use the teachings of the invention by simply employing the elements of the independent claims. Therefore, the embodiments of this disclosure set forth herein are intended to be illustrative rather than restrictive. Various changes may be made without departing from the spirit and scope of this disclosure.

[0086] In this disclosure, relative terms (e.g., “first,” “second,” and the like) may be used individually to distinguish one entity or action from another without necessarily requiring or implying any actual relationship or order between such entities or actions. The term “comprise / comprising” or any other variation thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but may also include other elements not expressly listed or inherent to the process, method, article, or apparatus. Elements beginning with “a / an” or the like (without further constraints) do not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element. Furthermore, the term “another” is defined as at least a second or more. As used herein, the terms “comprising,” “having,” and the like are defined as “including.”

Claims

1. A method for sidelink communication performed by a first peer user equipment (UE), comprising: The second peer UE receives a second request for DRX configuration for one or more sidelink interruptions, wherein the second request contains auxiliary information; and The first peer UE transmits the one or more sidelink DRX configurations determined based on the auxiliary information to the second peer UE. The first peer UE has multiple destination IDs, and the first peer UE enters a sidelink activity period to monitor sidelink communication during each on-time duration associated with each destination ID. Each sidelink DRX configuration is associated with a resource pool configuration and a resource pool ID. For each of the first peer UE and the second peer UE, each sidelink DRX configuration and the resource pool configuration are configured separately. When the sidelink DRX configuration is misaligned with the corresponding resource pool configuration, the second peer UE does not enter the sidelink activity time during the on-duration period associated with the sidelink DRX configuration.

2. The method according to claim 1, wherein the first peer UE configuration has one or more initial sidelink DRX configurations, the initial sidelink DRX configurations being broadcast in the System Information Block (SIB), transmitted using dedicated RRC signaling, or pre-configured.

3. The method of claim 1 or 2, wherein each sidelink DRX configuration or each initial sidelink DRX configuration comprises at least one of the following: On duration; Offset to the start of the activation duration; Non-activity time; Hybrid Automatic Repeatable Request (HARQ) Round-Trip Time (RTT); HARQ retransmission time; The next reserved time associated with the next transmission on the side link; and Event time.

4. The method of claim 1 or 2, wherein each sidelink DRX configuration or each initial sidelink DRX configuration is associated with at least one of the following: A sidelink radio bearer carries an SLRB configuration and an SLRB ID; A Quality of Service (QoS) flow and a QoS flow ID; A PC5 QoS index, PQI; One logical channel configuration and one logical channel ID; A unicast link and its unicast link ID; A destination ID; and A source ID.

5. The method of claim 1, wherein the second peer UE sends the second request during or after the establishment of a unicast connection between the first peer UE and the second peer UE.

6. The method of claim 1, wherein the auxiliary information includes a first type of parameter indicating the requirements of the second peer UE.

7. The method of claim 1, wherein the auxiliary information includes a second type of parameter indicating the DRX configuration between the second peer UE and the second base station BS.

8. The method of claim 7, wherein the second type of parameter includes DRX configuration in RRC-CONNECTED, and / or DRX configuration in IDLE or INACTIVE.

9. The method of claim 2, further comprising: The first peer UE transmits the one or more initial sidelink DRX configurations to the second peer UE.

10. The method of claim 2, further comprising: When the first peer UE is outside the coverage area of ​​the base station BS, the first peer UE transmits the one or more initial sidelink DRX configurations to the second peer UE.

11. The method of claim 2, further comprising: The first peer UE transmits a first request for the configuration of one or more sidelink DRXs to the first base station BS. and The first peer UE determines the one or more sidelink DRX configurations based on the response from the first BS.

12. The method of claim 11, further comprising: When the first peer UE is within the coverage area of ​​the first BS and is in IDLE or INACTIVE mode, the first peer UE initiates the Radio Resource Control (RRC) connection setup process with the first BS.

13. The method of claim 11, wherein the response from the first BS comprises one or more new sidelink DRX configurations.

14. The method of claim 11, wherein the auxiliary information includes a second type of parameter indicating the DRX configuration between the second peer UE and the second BS.

15. The method of claim 14, wherein the response indication from the first BS is: Reuse the parameters of the second type from the second peer UE, or Use a portion of the parameters of the second type from the second peer UE and update another portion of the parameters of the second type.

16. The method of claim 11, wherein the auxiliary information includes a third type of parameter indicating information about the second BS.

17. The method of claim 16, further comprising: The first BS requests the DRX configuration between the second peer UE and the second BS from the second BS; The response is determined based on the DRX configuration between the second peer UE and the second BS; and The first BS transmits the response to the first peer UE.

18. The method of claim 1, further comprising: The determined sidelink DRX configuration is transmitted from the second peer UE to the second BS.

19. The method of claim 18, further comprising: The second BS updates the DRX configuration between the second peer UE and the second BS based on the determined sidelink DRX configuration.

20. A method for sidelink communication, comprising: A first request for configuring one or more sidelink DRXs is received from a first peer user equipment (UE), wherein the first request includes auxiliary information from a second peer UE, wherein the first peer UE has multiple destination IDs, and the first peer UE enters a sidelink activity time to monitor sidelink communication during each on-time duration associated with each destination ID. and The first base station (BS) determines the response based on the auxiliary information. Each sidelink DRX configuration is associated with a resource pool configuration and a resource pool ID. For each of the first peer UE and the second peer UE, each sidelink DRX configuration and the resource pool configuration are configured separately. When the sidelink DRX configuration is misaligned with the corresponding resource pool configuration, the second peer UE does not enter the sidelink activity time during the on-duration period associated with the sidelink DRX configuration.

21. The method of claim 20, wherein the auxiliary information includes a first type of parameter indicating the requirements of the second peer UE.

22. The method of claim 20, wherein the auxiliary information includes parameters of a second type indicating the DRX configuration between the second peer UE and the second BS.

23. The method of claim 22, wherein the second type of parameter includes a DRX configuration in RRC-CONNECTED and / or a DRX configuration in IDLE or INACTIVE.

24. The method of claim 22, wherein the response indicates: Reuse the parameters of the second type from the second peer UE, or Use a portion of the parameters of the second type from the second peer UE and update another portion of the parameters of the second type.

25. The method of claim 20, wherein the response from the first BS comprises one or more new sidelink DRX configurations.

26. The method of claim 20, wherein the auxiliary information includes a third type of parameter indicating information about the second BS.

27. The method of claim 26, further comprising: The first BS requests the DRX configuration between the second peer UE and the second BS from the second BS; The response is determined by the first BS based on the DRX configuration between the second peer UE and the second BS; and The first BS transmits the response to the first peer UE.

28. An apparatus comprising: Non-transitory computer-readable media having computer-executable instructions stored thereon; Receiver circuit system; Transmission circuit system; and One or more processors coupled to the non-transitory computer-readable medium, wherein the computer-executable instructions cause the one or more processors to perform the method of any one of claims 1 to 19.

29. An apparatus comprising: Non-transitory computer-readable media having computer-executable instructions stored thereon; Receiver circuit system; Transmission circuit system; and One or more processors coupled to the non-transitory computer-readable medium, wherein the computer-executable instructions cause the one or more processors to perform the method of any one of claims 20 to 27.

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