Method and apparatus for sidelink communication

Abstract

The present disclosure relates to a method and apparatus for sidelink communication between user devices in a wireless communication network. In one implementation, the method may include: receiving discontinuous reception configuration auxiliary information. The method may also include: determining a discontinuous reception configuration scheme for sidelink communication between a first user device and a second user device based on the discontinuous reception configuration auxiliary information. The method may also include: performing sidelink discontinuous reception of the sidelink communication according to the discontinuous reception configuration scheme.

Description

[0001] This application is a continuation of PCT international application No. PCT / CN2020 / 075075 filed with the State Intellectual Property Office of the People’s Republic of China on February 13, 2020, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present disclosure relates generally to wireless communications and particularly to sidelink communications between communication terminals including vehicles. Background Art

[0003] Sidelink is a unilateral wireless communication service, i.e., communication between communication terminals. IoV refers to a large-scale system in which vehicles, pedestrians, roadside equipment and the Internet conduct wireless communication and information exchange according to agreed communication protocols and data exchange standards. IoV communication enables vehicles to achieve safe driving, improve traffic efficiency, and obtain convenient or entertainment information. IoV communication can be divided into three types according to the objects of wireless communication: communication between vehicles, i.e., vehicle-to-vehicle (V2V); communication between vehicles and roadside equipment / network infrastructure, i.e., vehicle-to-infrastructure / vehicle-to-network (V2I / V2N); and communication between vehicles and pedestrians, i.e., vehicle-to-pedestrian (V2P). These types of communication are collectively referred to as vehicle-to-everything (V2X) communication.

[0004] In the V2X communication research of the Third Generation Partnership Project (3GPP), sidelink-based V2X communication between user equipments is one of the ways to implement the V2X standard, in which service data is directly sent from the source user equipment to the destination user equipment via the air interface without being forwarded by the base station and the core network, such as Figure 1 This type of V2X communication is called PC5-based V2X communication or V2X sidelink communication.

[0005] With the technological advancement and development of the automation industry, the scenarios of V2X communication have become more diversified, and the performance requirements have become increasingly higher. Advanced V2X services include vehicle platoons, extended sensors, advanced driving (semi-automatic driving and fully automatic driving), and remote driving. The expected performance requirements may include: supporting data packets of 50 to 12,000 bytes in size, transmission rates of 2 to 50 messages per second, maximum end-to-end latency of 3 to 500 milliseconds, reliability of 90% to 99.999%, data rates of 0.5 to 1000Mbps, and transmission ranges of 50 to 1000 meters. Summary of the invention

[0006] The present disclosure relates to methods, systems, and devices related to wireless communications, and more particularly to sidelink communications between communication terminals to save power of the communication terminals.

[0007] In one embodiment, a method performed by a first user equipment in a wireless communication network is disclosed. The method may include: receiving discontinuous reception configuration auxiliary information. The method may also include: determining a discontinuous reception configuration scheme for sidelink communication between the first user equipment and a second user equipment based on the discontinuous reception configuration auxiliary information. The method may also include: performing sidelink discontinuous reception of the sidelink communication according to the discontinuous reception configuration scheme.

[0008] In another embodiment, a device for wireless communication may include a memory storing instructions and a processing circuit system in communication with the memory. When the processing circuit system executes the instructions, the processing circuit system is configured to perform the above method.

[0009] In another embodiment, a computer readable medium comprising instructions is provided, which when executed by a computer causes the computer to perform the above method.

[0010] The above and other aspects and implementations thereof are described in more detail in the following drawings, description and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 An example diagram of a wireless communication network is shown in accordance with various embodiments.

[0012] Figure 2 A flow chart of a method for sidelink communication according to an embodiment is shown. DETAILED DESCRIPTION

[0013] The techniques and examples of implementations and / or embodiments in the present disclosure can be used to improve performance in wireless communication systems. The term "exemplary" is used to mean "an example of..." and, unless otherwise specified, does not imply an ideal or preferred example, implementation, or embodiment. The use of section headings in the present disclosure is intended to facilitate understanding and does not limit the techniques disclosed in the sections to the corresponding sections. However, it is noted that implementations can be embodied in a variety of different forms, and therefore, the subject matter covered or claimed is intended to be interpreted as not being limited to any embodiment to be described below. It is also noted that implementations can be embodied as methods, devices, components, or systems. Therefore, the embodiments of the present disclosure can, for example, take the form of hardware, software, firmware, or any combination thereof.

[0014] A radio access network provides a network connection between a user equipment (UE) and an information or data network, such as a text, voice or video communication network, the Internet, etc. An example radio access network may be based on a cellular technology, which may also be based on, for example, 4G LTE or 5G NR technologies and / or formats. Figure 1An example system diagram of a wireless communication network 100 including UE 102, 124 and 126 and a wireless access network node (WANN) 104 according to various embodiments is shown. UE 102, 124 and 126 may include, but are not limited to, mobile phones, smart phones, tablet computers, laptop computers, vehicle-mounted communication devices, roadside communication devices, smart electronic products or appliances (including air conditioners, televisions, refrigerators, ovens, or other devices capable of wireless communication over a network). UEs may communicate directly with each other via side links. Taking UE 102 as an example, UE 102 may include a transceiver circuit system 106, which is coupled to an antenna 108 to implement wireless communication with a wireless access network node 104. The transceiver circuit system 106 may also be coupled to a processor 110, which may also be coupled to a memory 112 or other storage device. The memory 112 may store instructions or codes therein, which, when read and executed by the processor 110, cause the processor 110 to implement the various methods described herein.

[0015] Similarly, the radio access network node 104 may include a base station or other wireless network access point capable of wirelessly communicating with one or more UEs through a network. For example, the radio access network node 104 may include a 4G LTE base station, a 5G NR base station, a 5G central unit base station, or a 5G distributed unit base station. Each type of these radio access network nodes may be configured to perform a corresponding set of wireless network functions. The set of wireless network functions between different types of radio access network nodes may be different. However, the set of wireless network functions between different types of radio access network nodes may overlap in function. The radio access network node 104 may include a transceiver circuit system 114 coupled to an antenna 116, and the antenna 116 may include an antenna tower 118 in various ways to achieve wireless communication with UE 102, 124, and 126. The transceiver circuit system 114 may also be coupled to one or more processors 120, and the processor 120 may also be coupled to a memory 122 or other storage device. The memory 122 may store instructions or codes therein, which, when read and executed by the processor 120, cause the processor 120 to implement the various methods described herein.

[0016] For simplicity and clarity, only one WANN and three UEs are shown in the wireless communication network 100. It should be understood that there may be one or more WANNs in the wireless communication network, and each WANN may serve one or more UEs at the same time. In addition to UEs and WANNs, the network 100 may also include any other network nodes with different functions, such as network nodes in the core network of the wireless communication network 100. In addition, although various embodiments will be discussed in the context of a specific example wireless communication network 100, the basic principles are applicable to other applicable wireless communication networks.

[0017] In sidelink communications between UEs, such as V2X, the UE needs to monitor the sidelink signal in the entire range of the sidelink receiving resource pool, which consumes a lot of power and is inefficient. One of the purposes of the present disclosure is to reduce the power consumption of sidelink communications while meeting latency requirements.

[0018] Figure 2 An exemplary implementation 200 for sidelink communication of a user equipment is shown. UE 102 may receive discontinuous reception (DRX) configuration assistance information (210), determine a DRX configuration scheme for sidelink communication between UE 102 and UE 124 based on the DRX configuration assistance information (220), and perform sidelink discontinuous reception of the sidelink communication according to the DRX configuration scheme (230). The discontinuous reception configuration scheme may indicate a receive on duration and / or a receive off duration. In this manner, UE 102 may monitor a physical sidelink control channel (PSCCH) to receive the sidelink communication only at a time domain intersection between the receive on duration and a sidelink receive resource pool for the sidelink communication.

[0019] Next, we will refer to Figure 1 and Figure 2 Various detailed embodiments are discussed to illustrate the technical solutions of the present disclosure.

[0020] First embodiment

[0021] UE 102 may receive DRX configuration assistance information (210) from a radio access network node such as WANN 104. The DRX configuration assistance information may include, for example, recommended sidelink DRX configuration information, sidelink transmission resource pool information, sidelink reception resource pool information, and sidelink DRX configuration information of other UEs. The sidelink DRX configuration information of other UEs may include, for example, a service type in a sidelink communication and a corresponding DRX configuration parameter. The service type may be represented by a destination identifier, a destination identifier index, a destination UE identifier, or a destination UE identifier index. The destination identifier and the destination identifier index may refer to the type of sidelink service without distinguishing the sending UE. The destination UE identifier and the destination UE identifier index may refer to the type of sidelink service sent from a specific UE. Examples of various types of services may include safe driving information, road traffic information, entertainment information, etc.

[0022] UE 102 may receive the sidelink DRX configuration assistance information from WANN 104 via a radio resource control (RRC) dedicated message. Alternatively, UE 102 may receive the sidelink DRX configuration assistance information from WANN 104 via a broadcast message.

[0023] After receiving the DRX configuration assistance information (210) from WANN 104, UE 102 can determine a DRX configuration scheme (220) for sidelink communication between UE 102 and UE 124 based on the DRX configuration assistance information. The DRX configuration scheme can include at least one set of DRX configuration parameters. A set of DRX configuration parameters can include, for example, a sidelink DRX cycle, a duration, an on-duration mode, a first inactivity timer, and a second inactivity timer. The on-duration mode can include a time slot bitmap indicating a sidelink DRX on-duration, which will be discussed in detail later.

[0024] Specifically, UE 102 may determine or update its DRX configuration parameters for sidelink communication by itself using the DRX configuration assistance information as a reference, and then apply the determined / updated DRX configuration parameters to the DRX configuration scheme for sidelink communication.

[0025] Once the sidelink DRX configuration scheme is set, UE 102 does not have to continuously monitor PSCCH. Instead, UE 102 can monitor PSCCH only during the receive on duration. But it may still monitor other physical layer channels at any time.

[0026] Optionally, before receiving the DRX configuration assistance information from the WANN 104, the UE 102 may send a DRX configuration assistance information request message to the WANN 104, where the DRX configuration assistance information request message may include, for example, a destination identifier, a destination user equipment identifier list, and a transmission mode. The transmission mode may include, for example, unicast, multicast, and broadcast.

[0027] In some implementations, through the DRX configuration assistance information request message, the WANN 104 can learn the types of services that the UE 102 is interested in monitoring and receiving, and then send only the DRX configuration assistance information related to the service type of interest to the UE 102.

[0028] Optionally, before receiving the DRX configuration assistance information from the WANN 104, the UE 102 may send capability information indicating whether the UE 102 supports sidelink discontinuous reception, user equipment status information, and / or service quality requirements to the WANN 104. The UE status information may include, for example, pedestrian UE, non-pedestrian UE, UE with power saving requirements, UE without power saving requirements, and power saving level. The service quality requirements may include, for example, time delay, reliability, service priority, error rate, service quality identifier, and service flow quality identifier.

[0029] For example, WANN 104 may determine whether to send DRX configuration assistance information to UE 102 based on the capability information. For another example, WANN 104 may determine DRX configuration assistance information, such as a recommended sidelink DRX configuration scheme, based on user equipment status information and / or quality of service requirements.

[0030] Second embodiment

[0031] UE 102 may receive DRX configuration assistance information (210) from another UE, such as UE 124. The DRX configuration assistance information may include, for example, recommended sidelink DRX configuration information, semi-persistent scheduling (SPS) assistance information, sidelink transmit resource pool information, sidelink receive resource pool information, power saving requirements, quality of service information, and sidelink control information indicating a retransmission interval or a resource reservation period.

[0032] UE 102 may receive the DRX configuration assistance information from UE 124 via a unicast sidelink RRC message, a multicast sidelink RRC message, or a broadcast sidelink RRC message.

[0033] After receiving the DRX configuration assistance information (210) from UE 124, UE 102 may determine a DRX configuration scheme (220) for sidelink communications between UE 102 and UE 124 based on the DRX configuration assistance information. The DRX configuration scheme may include at least one set of DRX configuration parameters. The set of DRX configuration parameters may include, for example, a sidelink DRX cycle, a duration, an on-duration mode, a first inactivity timer, and a second inactivity timer.

[0034] Specifically, UE 102 may determine or update its DRX configuration parameters for sidelink communication by itself using the DRX configuration assistance information as a reference, and then apply the determined / updated DRX configuration parameters to determine the DRX configuration scheme for the sidelink communication.

[0035] Once the sidelink DRX configuration scheme is set, the UE 102 does not have to continuously monitor the PSCCH. Instead, the UE 102 can monitor the PSCCH only during the receive on-duration.

[0036] Optionally, after receiving the sidelink DRX configuration assistance information sent from UE 124, UE 102 may send the sidelink DRX configuration assistance information to WANN 104. Alternatively or additionally, UE 102 may send both the sidelink DRX configuration assistance information and the identification of UE 124 to WANN 104. The identification of UE 124 may be represented by a destination UE identifier, a destination UE identifier index, a destination identifier, or a destination identifier index.

[0037] Third embodiment

[0038] As an example, this embodiment will discuss determining a DRX configuration solution based on a DRX configuration assistant in different scenarios.

[0039] Scenario 1: UE is in unicast sidelink communication

[0040] In this scenario, UEs in communication (such as UE 102 and UE 124) can establish a sidelink RRC connection. A sending UE such as UE 124 can send SPS assistance information to a receiving UE such as UE 102 based on the sending resource pool of UE 124 and the service arrival period. In some implementations, the sending UE can only send SPS assistance information related to the receiving UE. In this way, the receiving UE can determine the sidelink DRX configuration parameters based on the received SPS assistance information. For example, the receiving UE can derive the arrival time of the data packet from the SPS assistance information.

[0041] Alternatively or additionally, the transmitting UE may send the recommended sidelink DRX configuration information to the receiving UE based on its predicted arrival pattern of the transmission service. If the receiving UE has a unicast connection with multiple transmitting UEs, it may receive different DRX configuration recommendations from the multiple transmitting UEs. The receiving UE may then use these DRX configuration recommendations as a reference to determine the sidelink DRX configuration parameters on its own.

[0042] Scenario 2: UE is in multicast communication

[0043] In this scenario, the sending UE can send SPS auxiliary information to the receiving UE via a multicast message based on the sending resource pool and service arrival period of the sending UE. In some implementations, the sending UE can only send SPS auxiliary information related to the receiving UE. In this way, the receiving UE can determine the sidelink DRX configuration parameters based on the received SPS auxiliary information. For example, the receiving UE can derive the arrival time of the data packet from the SPS auxiliary information.

[0044] Alternatively or additionally, the transmitting UE may send the recommended sidelink DRX configuration information to the receiving UE via a multicast message based on the arrival pattern of the transmission service it predicts. If the receiving UE communicates with multiple transmitting UEs, it may receive different DRX configuration recommendations from the multiple transmitting UEs. The receiving UE may then use these DRX configuration recommendations as a reference to determine the sidelink DRX configuration parameters on its own.

[0045] Finally, a multicast sidelink RRC connection may be established to exchange information. Alternatively, the UEs may individually establish unicast connections with each other for sending sidelink DRX related configuration information.

[0046] Scenario 3: UE is in broadcast communication

[0047] In this scenario, the transmitting UE may send SPS auxiliary information to the receiving UE via a broadcast message based on the transmitting resource pool and service arrival period of the transmitting UE. In some implementations, the transmitting UE may only send SPS auxiliary information related to the receiving UE. In this way, the receiving UE may determine the sidelink DRX configuration parameters based on the received SPS auxiliary information. For example, the receiving UE may derive the arrival time of the data packet from the SPS auxiliary information.

[0048] Alternatively or additionally, the transmitting UE may send the recommended sidelink DRX configuration information to the receiving UE via a broadcast message based on the arrival pattern of the transmission service it predicts. If the receiving UE communicates with multiple transmitting UEs, it may receive different DRX configuration recommendations from the multiple transmitting UEs. The receiving UE may then use these DRX configuration recommendations as a reference to determine the sidelink DRX configuration parameters on its own.

[0049] Finally, a sidelink broadcast RRC message for exchanging information may be defined. Alternatively, the UEs may exchange information via sidelink signaling such as network protocol messages (NAS messages). Subframes between UEs should be aligned after information exchange.

[0050] Fourth embodiment

[0051] As an example, this embodiment will discuss using a time slot bitmap to indicate an on-duration mode in a DRX configuration parameter.

[0052] The slot bitmap may indicate which slots or symbols are sidelink receive resources in the sidelink resource pool. In some implementations, a sidelink DRX cycle is configured, and the sidelink DRX cycle may be an integer multiple of the period of the sidelink receive resource pool (i.e., the length of the slot bitmap). Alternatively, the period of the sidelink receive resource pool may be an integer multiple of the sidelink DRX cycle. Thus, the receive on duration may be configured as the number of slots within the sidelink resource pool after the start of the DRX cycle.

[0053] Similarly, the time slot bitmap can indicate which time slots are configured as reception-on or reception-off within the range of the indicated transmission resources. In some implementations, a sidelink DRX bitmap is configured. For example, there are 10 time slots in one cycle of the sidelink resource pool, and time slots 1, 2, 6, 7, and 9 are used as the sidelink reception resource pool. On the basis of these five time slots, a sidelink DRX bitmap can be used to indicate which of them are reception-on duration time slots. Specifically, since the number of time slots used for sidelink reception in one cycle of the sidelink resource pool is five, the period of the sidelink DRX bitmap can be configured as five. The sidelink DRX bitmap can be, for example, [1,0,1,0,1], which means that DRX is turned on in time slots 1, 6, and 9, and DRX is turned off in time slots 2 and 7. In a similar manner, DRX is turned on in time slots 11, 16, 19, 21, 26, 29,..., and DRX is turned off in time slots 12, 17, 22, 27,...

[0054] Optionally, the period of the sidelink DRX bitmap can be longer than the period of the sidelink resource pool. In this way, the parameter sidelink DRX period can be configured as an integer N times the period of the sidelink receive resource pool. If N is 2, the period of the sidelink DRX bitmap is equal to ten (2 x 5). For example, the sidelink DRX bitmap can be [1,0,1,0,1,1,0,0,0,1], which means that DRX is turned on in time slots 1, 6, 9, 11, 19, and DRX is turned off in time slots 2, 7, 12, 16, 17.

[0055] Fifth embodiment

[0056] As an example, this embodiment will discuss that UE 102 may be configured with multiple DRX configuration schemes, each of which may have a set of sidelink DRX configuration parameters.

[0057] In some implementations, multiple DRX configuration schemes may be configured based on different destination UEs. In particular, DRX on-duration patterns may be customized for different destination UEs. For example, UE 102 establishes sidelink connections with both UE 124 and UE 126. UE 124 and UE 126 have completely different transmit resource pool configurations, so the resource locations to be monitored may be different. In this case, two DRX configuration schemes may be configured for UE 102 to accommodate different resource locations to be monitored, respectively.

[0058] In another implementation, multiple DRX configuration schemes may be configured according to different sidelink reception resource pool configurations. For example, if UE 102 is configured with multiple reception resource pools, multiple DRX configuration schemes may correspond to these reception resource pools, respectively.

[0059] Sixth embodiment

[0060] As an example, this embodiment will discuss reporting of measured sidelink channel state information (CSI) by UE 102 in the context of UE 102 being configured with a DRX configuration scheme.

[0061] Specifically, UE 102 may receive sidelink CSI reporting configuration information including CSI report masking from, for example, UE 124. CSI report masking may indicate whether to delay reporting of the sidelink channel state indication until the sidelink active time. The receive on / off duration set in the DRX configuration scheme may define the sidelink active / inactive time for UE 102. In the event that CSI report masking indicates that a delay is required, UE 102 may delay reporting the sidelink CSI until the sidelink active time defined by the DRX configuration scheme. Therefore, if the UE is configured with sidelink DRX, the most recent CSI measurement timing may occur in the sidelink DRX active time of the CSI to be reported.

[0062] Seventh embodiment

[0063] In the context of sidelink communication, the sidelink control information (SCI) of the transmitting UE may carry an SPS period or a retransmission interval or a resource reservation period. In the next cycle indicated by the SPS period or in the retransmission position indicated by the retransmission interval or the resource reservation period, the receiving UE may be in a DRX off state, i.e., an inactive state. This is the case when the transmitting UE is unaware of the DRX configuration scheme of the receiving UE. The question is whether the receiving UE can receive the sidelink communication at the next new transmission or retransmission position, although it is in a DRX off state.

[0064] One option is that the UE must wake up at the next new transmission or retransmission position indicated by the SCI regardless of the DRX off state. In this case, a retransmission is likely to occur due to the reception of the SCI, which may also trigger the restart of the timers drx-RetransmissionTimerSL and drx-HARQ-RTT-TimerSL.

[0065] Another option is not to change the provisions in the DRX configuration scheme. Therefore, the receiving UE may not receive the SCI message during its DRX reception off duration. But it can receive the message from the physical sidelink shared channel (PSSCH) resource indicated by the previous SCI. This option is suitable for broadcast scenarios without feedback.

[0066] Another option is to restrict the configuration of DRX and SPS, for example, requiring that the duration of the timer drx-InactivityTimer must be longer than the maximum SPS period.

[0067] In some implementations, if the sending UE can estimate the time of the next transmission and the receiving UE is only interested in the current transmission service, an SPS-related timer can be introduced. For example, when the receiving UE receives an SCI indicating a retransmission interval or a resource retention period from the sending UE, the receiving UE can start an SPS silent timer, and the timer duration of the SPS silent timer is equal to the retransmission interval or the resource retention period. During the timer duration, the receiving UE is in a DRX off state during the relevant process. When the SPS silent timer expires, the receiving UE can start an SPS active timer for the relevant process and switch to a DRX on state, i.e., an active state, until the SPS active timer expires, regardless of the DRX configuration scheme. The duration of the SPS active timer is configurable within a duration range.

[0068] Optionally, the receiving UE may receive SPS active timer configuration information and / or SPS silent timer configuration information before receiving the DRX configuration assistance information. The SPS active timer configuration information may indicate the duration of the SPS active timer, and the SPS silent timer configuration information may indicate the duration of the SPS silent timer.

[0069] Throughout the specification and claims, terms may have nuanced meanings expressed or implied in the context, beyond the explicitly stated meanings. Likewise, the phrase "in one embodiment / implementation" as used herein does not necessarily refer to the same embodiment, and the phrase "in another embodiment / implementation" as used herein does not necessarily refer to a different embodiment. For example, the claimed subject matter is intended to include combinations of all or part of the example embodiments.

[0070] In general, terms can be understood at least in part from their use in context. For example, terms such as "and", "or" or "and / or" used herein can include multiple meanings, which can depend at least in part on the context in which the terms are used. Typically, "or" if used in an association list, such as A, B or C, is intended to represent A, B and C (here in an inclusive sense), and A, B or C (here in an exclusive sense). In addition, depending at least in part on the context, the term "one or more" used herein can be used to describe any feature, structure or characteristic in a single sense, or can be used to describe a combination of features, structures or characteristics in a plural sense. Similarly, depending at least in part on the context, terms such as "a", "an" or "the" can be understood to convey singular usage or to convey plural usage. In addition, again, depending at least in part on the context, the term "based on" can be understood to not necessarily be intended to convey a set of exclusive factors, but can allow for the presence of additional factors that are not necessarily explicitly described.

[0071] References throughout this specification to features, advantages, or similar language do not imply that all features and advantages that may be achieved with the present solution should be included or included in any single implementation thereof. Rather, language referring to features and advantages is understood to mean that a particular feature, advantage, or characteristic described in connection with an embodiment is included in at least one embodiment of the present solution. Thus, discussion of features and advantages and similar language throughout this specification may, but does not necessarily, refer to the same embodiment.

[0072] Furthermore, the described features, advantages, and characteristics of the present solution may be combined in any suitable manner in one or more embodiments. Based on the description herein, one of ordinary skill in the relevant art will recognize that the present solution may be practiced without one or more of the specific features or advantages of a particular embodiment. In other cases, additional features and advantages may be found in certain embodiments that may not be present in all embodiments of the present solution.

Claims

1. A method performed by a first user equipment in a wireless communication network, comprising: Receiving discontinuous reception configuration auxiliary information; Determining, based on the discontinuous reception configuration auxiliary information, a discontinuous reception configuration parameter for side link communication between the first user equipment and the second user equipment; applying the discontinuous reception configuration parameters to a discontinuous reception configuration scheme for the sidelink communication; as well as In response to receiving sidelink control information including a retransmission interval or a resource reservation period from the second user equipment, waking up the first user equipment at a next new transmission or retransmission position indicated by the sidelink control information.

2. The method according to claim 1, wherein the discontinuous reception configuration scheme indicates a reception on-duration time, and performing the sidelink discontinuous reception comprises: A physical sidelink control channel is monitored to receive the sidelink communication only at a time domain intersection between the receive on-duration and a sidelink receive resource pool used for the sidelink communication.

3. The method according to claim 1, further comprising: According to the discontinuous reception configuration scheme, sidelink discontinuous reception of the sidelink communication is performed.

4. The method according to claim 1, wherein the discontinuous reception configuration scheme includes one or more groups of discontinuous reception configuration parameters, each of the one or more groups of discontinuous reception configuration parameters includes at least one of the following: a side link discontinuous reception period, a duration, an on-duration mode, a first inactivity timer, and a second inactivity timer.

5. The method according to claim 1, wherein receiving the discontinuous reception configuration assistance information comprises: receiving first discontinuous reception configuration auxiliary information from the second user equipment, and receiving second discontinuous reception configuration auxiliary information from a third user equipment; as well as Determining the discontinuous reception configuration scheme includes: The discontinuous reception configuration scheme is determined based on the first discontinuous reception configuration auxiliary information and the second discontinuous reception configuration auxiliary information.

6. The method according to claim 1, wherein the discontinuous reception configuration assistance information comprises: Expected sidelink discontinuous reception configuration information.

7. The method according to claim 1, wherein receiving the discontinuous reception configuration assistance information comprises: The discontinuous reception configuration auxiliary information is received from the second user equipment.

8. The method of claim 7, wherein the discontinuous reception configuration assistance information is received from the second user equipment via a unicast sidelink radio resource control message.

9. The method according to claim 7, wherein the discontinuous reception configuration assistance information is received from the second user equipment, and the method further comprises: The discontinuous reception configuration auxiliary information is reported to a wireless access node.

10. The method according to claim 9, further comprising: Sending the identifier of the second user equipment to the wireless access node. The method of claim 10 , wherein the identification of the second user equipment comprises a destination user equipment identifier.

12. The method according to claim 9, further comprising: Before receiving the discontinuous reception configuration auxiliary information from the wireless access node, at least one of the following is sent to the wireless access node: capability information indicating whether the first user equipment supports sidelink discontinuous reception, user equipment state information, and quality of service requirements. 13 . The method according to claim 12 , wherein the user equipment status information comprises at least one of the following: a pedestrian user equipment, a non-pedestrian user equipment, a user equipment with power saving requirements, a user equipment without power saving requirements, and a power saving level.

14. The method according to claim 12, wherein the quality of service requirement comprises at least one of the following: time delay, reliability, service priority and error rate, quality of service identifier, and quality of service flow identifier.

15. The method according to claim 2, further comprising: receiving sidelink channel state indication reporting configuration information, the sidelink channel state indication reporting configuration information including a channel state indication reporting mask, the channel state indication reporting mask indicating whether to delay reporting of the sidelink channel state indication until a sidelink active time; as well as In response to the delay being indicated, delaying reporting the sidelink channel state indication until the sidelink activity time defined by the discontinuous reception configuration scheme.

16. The method according to claim 1, further comprising: In response to receiving sidelink control information indicating a retransmission interval or a resource reservation period from the second user equipment, starting a semi-persistent scheduled silence timer having a timer duration equal to the retransmission interval or the resource reservation period, during which the first user equipment is in an inactive state; as well as In response to the semi-persistent scheduling silence timer expiring, starting a semi-persistent scheduling activity timer, and switching the first user equipment to an active state until the semi-persistent scheduling activity timer expires.

17. The method according to claim 16, further comprising: Before receiving the discontinuous reception configuration auxiliary information, semi-persistent scheduling active timer configuration information indicating the duration of the semi-persistent scheduling active timer or semi-persistent scheduling silent timer configuration information indicating the duration of the semi-persistent scheduling silent timer is received.

18. A device for communication, comprising: a memory operable to store computer readable instructions; as well as A processor circuit operable to read the computer-readable instructions, the processor circuit being configured when executing the computer-readable instructions to: receiving discontinuous reception configuration auxiliary information; Determining, based on the discontinuous reception configuration auxiliary information, a discontinuous reception configuration parameter for side link communication between the first user equipment and the second user equipment; applying the discontinuous reception configuration parameters to a discontinuous reception configuration scheme for the sidelink communication; as well as In response to receiving sidelink control information including a retransmission interval or a resource reservation period from the second user equipment, waking up the first user equipment at a next new transmission or retransmission position indicated by the sidelink control information.

19. The apparatus of claim 18, wherein the processor circuit is configured to: The discontinuous reception configuration auxiliary information is received from the second user equipment.

20. The apparatus of claim 18, wherein the processor circuit is further configured to: The identification of the second user equipment is sent to a wireless access node, where the identification of the second user equipment includes a destination user equipment identifier.

21. A non-transitory machine-readable medium having stored thereon instructions configured to, when executed, cause a machine to: Receiving discontinuous reception configuration auxiliary information; Determining, based on the discontinuous reception configuration auxiliary information, a discontinuous reception configuration parameter for side link communication between the first user equipment and the second user equipment; applying the discontinuous reception configuration parameters to a discontinuous reception configuration scheme for the sidelink communication; as well as In response to receiving sidelink control information including a retransmission interval or a resource reservation period from the second user equipment, waking up the first user equipment at a next new transmission or retransmission position indicated by the sidelink control information.

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