A communication method and device

Abstract

The application relates to a communication method and device. Configuration information is obtained, and the configuration information is used for configuring a first resource used for sending a WUS sequence; a first WUS sequence is sent on a second resource, and the second resource is included in the first resource. The configuration information can be used for configuring a resource for sending a WUS sequence, so that each terminal device can determine the first resource according to the configuration information, which is equivalent to relatively fixing the resource position of the WUS sequence. For a terminal device detecting the WUS sequence, the terminal device only needs to detect on the first resource, and does not need to detect on more resources, which is beneficial to reducing the power consumption of the terminal device for detecting the WUS, and also reduces the detection difficulty of the terminal device.

Description

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese Patent Application No. 202110993019.0, filed on August 25, 2021, entitled “A Design Method for a Wake-up Signal Channel”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of communication technology, and in particular to a communication method and device. Background Technology

[0004] Building upon discontinuous reception (DRX), to further conserve power and reduce the DRX active time, a wake-up signal (WUS) can be introduced. This WUS indicates whether the UE should wake up within the current DRX on-duration or active time period before the DRX on-duration or active time begins. In sidelink (SL) communication scenarios, the UE can also send a WUS.

[0005] There may be multiple UEs transmitting WUS, and different UEs will transmit WUS on different resources. Even for the same UE, the resources used for transmitting WUS may change because other UEs may preempt them. This requires UEs detecting WUS to perform detection on more resources, increasing UE power consumption and detection difficulty. Summary of the Invention

[0006] This application provides a communication method and device for reducing power consumption of the UE due to WUS detection.

[0007] In a first aspect, a first communication method is provided, which can be executed by a terminal device, or by a larger device including the terminal device, or by a chip system or other functional module capable of implementing the functions of the terminal device, such as being disposed within the terminal device. The terminal device is referred to, for example, as a first terminal device. The method includes: obtaining configuration information for configuring a first resource for transmitting a WUS sequence; and transmitting the first WUS sequence in a second resource, the second resource being included in the first resource.

[0008] In this embodiment, the configuration information can be used to configure the resources for sending WUS sequences, so that each terminal device can determine the first resource according to the configuration information, which is equivalent to making the resource position of the WUS sequence relatively fixed. For the terminal device detecting the WUS sequence, it only needs to detect on the first resource, without needing to detect on more resources, which helps to reduce the power consumption of the terminal device in detecting WUS and also reduces the detection difficulty of the terminal device.

[0009] In conjunction with the first aspect, in a first optional implementation of the first aspect, the configuration information includes time-domain information, frequency-domain information, and a first period of the first resource, wherein the first period is the period in which the resource used to transmit the WUS sequence appears in the time domain. The first period can also be considered to be included in the time-domain information of the first resource; therefore, the configuration information may include both the time-domain information and the frequency-domain information of the first resource. The configuration information includes relatively rich content, thus allowing the first resource to be determined through the configuration information.

[0010] In conjunction with the first aspect or the first optional implementation of the first aspect, in the second optional implementation of the first aspect, the channel capacity of the first WUS channel satisfies the following relationship:

[0011] The channel capacity of the first WUS channel = M × H × K × P;

[0012] In this configuration, the first WUS channel carries the first WUS sequence. M represents the number of sub-channels included in the first WUS channel, H represents the number of PRBs included in a sub-channel, K represents the number of OFDM symbols occupied by the first WUS channel, and P represents the number of WUS sequences that a PRB can carry. M, H, and K are all positive integers, and P is a positive integer less than or equal to 12. This provides one method for determining the channel capacity of the first WUS channel; the channel capacity can be determined based on the information included in the configuration.

[0013] In conjunction with the first aspect or the first optional implementation of the first aspect, in the third optional implementation of the first aspect, the configuration information further includes a second period, which is longer than the first period, and one second period includes one or more first periods. The second period is the period during which the first terminal device transmits the WUS sequence. Without the introduction of the second period, the channel capacity of the WUS channel is the channel capacity of the WUS channel within one first period. In this case, the calculation of the WUS channel capacity only considers the symbols occupied by the WUS channel within one first period. However, with the introduction of the second period, the channel capacity of the WUS channel becomes the channel capacity of the WUS channel within one second period. In this case, the calculation of the WUS channel capacity considers the symbols occupied by the WUS channel within one second period. Since the number of symbols occupied by the WUS channel in the second period is obviously greater than the number of symbols occupied by the WUS channel in the first period, the channel capacity of the WUS channel can be increased in this way.

[0014] In conjunction with the third optional implementation of the first aspect, in the fourth optional implementation of the first aspect, the channel capacity of the first WUS channel satisfies the following relationship:

[0015] The channel capacity of the first WUS channel = M × H × K × P × N;

[0016] In this context, the first WUS channel carries the first WUS sequence; M represents the number of sub-channels included in the first WUS channel; H represents the number of Physical Resource Blocks (PRBs) included in a sub-channel; K represents the number of Orthogonal Frequency Division Multiplexing (OFDM) symbols occupied by the first WUS channel; P represents the number of WUS sequences that a PRB can carry; and N represents the number of first periods included in a second period. M, H, K, and N are all positive integers, and P is a positive integer less than or equal to 12. Based on the two methods for determining the channel capacity of the WUS channel as described above, it can be seen that introducing the second period expands the channel capacity of the first WUS channel.

[0017] In a fifth optional embodiment of the first aspect, combining any of the first to fourth optional embodiments of the first aspect, a first message is sent. This first message is used to reserve resources for transmitting WUS sequences. The reserved resources are determined based on the configuration information, wherein the reserved resources are either resources on the WUS channel or resources on the WUS channel used to carry WUS sequences. In this embodiment, multiple terminal devices can obtain the configuration information, allowing each terminal device to determine the first resource based on the configuration information. However, traditional terminal devices may not be able to recognize the configuration information. Therefore, traditional terminal devices may not know that the first resource is used to transmit WUS sequences and may preempt the first resource to transmit other information. To reduce resource collisions, optionally, the first terminal device can also send a first message, which can be used to reserve resources for transmitting WUS sequences. If a traditional terminal device receives the first message, it can clearly identify the resource reserved by the first message. For example, if the first message reserves a second resource, the traditional terminal device can refrain from preempting the second resource, thus reducing resource collisions. As can be seen, by sending the first message, the technical solution of this application embodiment can be made compatible with traditional terminal devices, making the application scope of this application embodiment more extensive.

[0018] In a sixth optional embodiment of the first aspect, combining any of the first to fifth optional embodiments of the first aspect, the first resource does not overlap with the resource pool used for random resource selection, or the first resource does not overlap with the first resource pool, wherein the terminal device does not listen to the PSCCH when selecting a resource within the first resource pool. For the terminal device, when using the resource pool used for random selection, or in other words, when selecting a resource within the resource pool used for random selection, it is not necessary to listen to the PSCCH; the selection is performed directly. Therefore, if the first resource is located in this resource pool, traditional terminal devices will not listen, and there is still a risk of resource collision. Therefore, optionally, the first resource and the resource pool used for random selection may not overlap, or in other words, the first resource does not belong to the resource pool used for random selection. This requires the terminal device to listen before selecting the first resource to reduce resource collisions. Alternatively, in addition to the resource pool used for random selection, the terminal device may also not need to listen to the PSCCH when using other resource pools. To further reduce the risk of resource collisions, optionally, the first resource may not overlap with the first resource pool, or in other words, the first resource may not belong to the first resource pool. When selecting a resource within the first resource pool, the terminal device will not listen to the PSCCH.

[0019] In conjunction with any of the first to sixth optional embodiments of the first aspect, in the seventh optional embodiment of the first aspect, the second resource occupies the last OFDM symbol within a time slot. The last symbol within a time slot is generally used for transmit / receive switching and is therefore unoccupied. The WUS channel can then occupy this symbol to improve resource utilization.

[0020] In conjunction with the seventh optional implementation of the first aspect, in the eighth optional implementation of the first aspect, the second resource also occupies the 12th OFDM symbol in the time slot, or the second resource also occupies the 1st OFDM symbol where the side-link feedback channel is located in the time slot. Generally, if the WUS channel occupies only one OFDM symbol without an AGC symbol, the receiving terminal device (e.g., the second terminal device) may not have enough time to perform processes such as receiving power adjustment. Currently, the 12th OFDM symbol in a time slot is generally used as an AGC symbol to allow the receiving end to adjust the receiving power when receiving the feedback channel. Therefore, the embodiments of this application reuse the AGC function of the 12th OFDM symbol in a time slot. That is, in addition to occupying the 14th OFDM symbol in a time slot, the WUS channel can also occupy the 12th OFDM symbol in a time slot, so that the receiving end can adjust the receiving power according to the 12th OFDM symbol.

[0021] In conjunction with any of the first to seventh optional embodiments of the first aspect, in the eighth optional embodiment of the first aspect, the second resource is located in the time domain within a first duration preceding the start time domain position of a DRX activation time. WUS can be used to indicate whether the receiver is awake during the activation of a DRX cycle; that is, WUS is generally related to DRX. Therefore, optionally, the WUS channel can be located in the time domain within a first duration preceding the start time domain position of a DRX activation time, so that WUS is better associated with the DRX activation time.

[0022] Secondly, a second communication method is provided. This method can be executed by a terminal device, a larger device including the terminal device, or a chip system or other functional module capable of implementing the functions of the terminal device. The chip system or functional module is, for example, housed within the terminal device. The terminal device may be, for example, a first terminal device or a second terminal device, where the first terminal device is the transmitter of the WUS sequence and the second terminal device is the receiver of the WUS sequence. The method includes: determining available resources on the sideline feedback channel; and transmitting or receiving a first WUS sequence on the available resources. In this embodiment, the WUS channel can occupy the symbols of the sideline feedback channel, reducing the resources occupied by the WUS channel and improving resource utilization. Furthermore, since the terminal device determines the available resources on the sideline feedback channel itself, no additional information configuration is required, saving the configuration process.

[0023] Thirdly, a third communication method is provided. This method can be executed by a terminal device, a larger device including the terminal device, or a chip system or other functional module capable of implementing the functions of the terminal device. The chip system or functional module is, for example, housed within the terminal device. The terminal device is, for example, a first terminal device. The method includes: sending sidelink control information, the sidelink control information including or excluding a first identifier, the first identifier being associated with a second terminal device, wherein the sidelink control information including the first identifier is used to instruct the second terminal device to listen to the sidelink control channel during the next DRX activation time. Through the technical solution of this application embodiment, the terminal device can achieve the WUS function through sidelink control information without additionally sending WUS sequences, which helps reduce signaling overhead.

[0024] Fourthly, a fourth communication method is provided, which can be executed by a terminal device, a larger device including the terminal device, or a chip system or other functional module capable of implementing the functions of the terminal device, for example, being disposed within the terminal device. The terminal device is, for example, a second terminal device. The method includes: receiving sidelink control information; if the sidelink control information includes a first identifier, listening to the sidelink control channel during the next DRX activation time, wherein the first identifier is associated with the second terminal device. For the beneficial effects of this method, please refer to the description of the beneficial effects of the third aspect.

[0025] Fifthly, a communication device is provided. The communication device can be a terminal device as described in any of the first to fourth aspects above. The communication device possesses the functions of the aforementioned terminal device. The communication device is, for example, a terminal device, or a functional module within a terminal device, such as a baseband device or a chip system. In one optional implementation, the communication device includes a baseband device and a radio frequency device. In another optional implementation, the communication device includes a processing unit (sometimes also called a processing module) and a transceiver unit (sometimes also called a transceiver module). The transceiver unit can implement both transmitting and receiving functions. When the transceiver unit implements the transmitting function, it can be called a transmitting unit (sometimes also called a transmitting module), and when the transceiver unit implements the receiving function, it can be called a receiving unit (sometimes also called a receiving module). The transmitting unit and the receiving unit can be the same functional module, which is called the transceiver unit and can implement both transmitting and receiving functions; or, the transmitting unit and the receiving unit can be different functional modules, and the transceiver unit is a collective term for these functional modules.

[0026] In one alternative implementation, the communication device further includes a storage unit, and the processing unit is configured to couple with the storage unit and execute programs or instructions in the storage unit to enable the communication device to perform the functions of the terminal device described in any one of the first to fourth aspects above.

[0027] In a sixth aspect, a computer-readable storage medium is provided for storing a computer program or instructions that, when executed, cause the methods performed by the terminal device in the above aspects to be implemented.

[0028] In a seventh aspect, a computer program product containing instructions is provided, which, when run on a computer, enables the methods described in the above aspects to be implemented.

[0029] Eighthly, an apparatus is provided, comprising units for performing the method described in any embodiment of the present application. Attached Figure Description

[0030] Figure 1A This is one implementation of DRX;

[0031] Figure 1B The working mechanism of DRX;

[0032] Figure 2 The working mechanism of WUS;

[0033] Figure 3 This is a schematic diagram illustrating an application scenario according to an embodiment of this application;

[0034] Figure 4 A flowchart illustrating the first communication method provided in this application embodiment;

[0035] Figure 5A This is a schematic diagram illustrating the relationship between the first cycle and the second cycle in an embodiment of this application;

[0036] Figure 5B This is a schematic diagram of a first WUS channel in an embodiment of this application;

[0037] Figure 5C This is a schematic diagram of the resources occupied by the WUS channel in an embodiment of this application;

[0038] Figure 5D This is a schematic diagram of the symbols occupied by the WUS channel in an embodiment of this application;

[0039] Figure 6 This is a schematic diagram of the first duration in an embodiment of this application;

[0040] Figure 7 A flowchart illustrating the second communication method provided in the embodiments of this application;

[0041] Figure 8 This is a schematic diagram illustrating how the UE determines available resources in an embodiment of this application;

[0042] Figure 9 A flowchart illustrating the third communication method provided in the embodiments of this application;

[0043] Figure 10 A flowchart illustrating the fourth communication method provided in the embodiments of this application;

[0044] Figure 11 This is a schematic diagram of the structure of a communication device provided in an embodiment of this application;

[0045] Figure 12 This is a schematic diagram of the structure of a terminal device provided in an embodiment of this application. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the embodiments of this application will be further described in detail below with reference to the accompanying drawings.

[0047] The following explanations of some terms or concepts used in the embodiments of this application are provided to facilitate understanding by those skilled in the art.

[0048] In this embodiment, the communication device is, for example, a terminal device, or a functional module (e.g., a chip system or communication chip) disposed within a terminal device, or a component or assembly having the functions of a terminal device, or a larger device including a terminal device. A terminal device is a device with wireless transceiver capabilities, and can be a fixed device, mobile device, handheld device (e.g., a mobile phone), wearable device, vehicle-mounted device, roadside unit (RSU), or a wireless device (e.g., a communication module, modem, or circuit system, etc.) built into the aforementioned devices. The terminal device is used to connect people, objects, and machines, and can be widely used in various scenarios, including but not limited to the following: cellular communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) communication, machine-to-machine / machine-type communications (M2M / MTC) communication, Internet of Things (IoT), virtual reality (VR), augmented reality (AR), industrial control, self-driving, remote medical, smart grid, smart furniture, smart office, smart wearables, smart transportation, smart city, drones, robots, etc. The terminal device may sometimes be referred to as user equipment (UE), terminal, access station, UE station, remote station, wireless communication equipment, or user device, etc. For ease of description, this application embodiment uses a UE as an example to illustrate the communication device.

[0049] The network devices in this application embodiment include, for example, access network devices and / or core network devices. The access network devices are devices with wireless transceiver capabilities, used for communication with the terminal devices. The access network devices include, but are not limited to, base transceiver stations (BTS), Node Bs, evolved Node Bs (eNodeB / eNB, or gNodeB / gNB), transmission reception points (TRPs), base stations evolved from the 3rd Generation Partnership Project (3GPP), access nodes in Wireless Fidelity (WiFi) systems, wireless relay nodes, and wireless backhaul nodes. The base stations can be macro base stations, micro base stations, pico base stations, small cells, relay stations, etc. Multiple base stations can support networks using the same access technology mentioned above, or they can support networks using different access technologies mentioned above. A base station can contain one or more co-located or non-co-located transmission and reception points. Network devices can also be radio controllers, centralized units (CUs), and / or distributed units (DUs) in cloud radio access network (CRAN) scenarios. Network devices can also be servers, wearable devices, vehicle-mounted devices, RSUs, etc. The following description of access network devices uses a base station as an example. Multiple network devices in the communication system can be base stations of the same type or different types. Base stations can communicate with terminal devices or through relay stations. Terminal devices can communicate with multiple base stations in different access technologies. The core network devices are used to implement functions such as mobility management, data processing, session management, policy and billing. The names of devices implementing core network functions can differ in systems using different access technologies; this application does not limit this. Taking a 5G system as an example, the core network devices include: access and mobility management function (AMF), session management function (SMF), or user plane function (UPF), etc.

[0050] In this application embodiment, the communication device used to implement the network device function can be a network device itself, or it can be a device capable of supporting the network device in implementing that function, such as a chip system. This device can be installed within the network device. In the technical solutions provided in this application embodiment, the example of a network device being used to implement the network device function is used to describe the technical solutions provided in this application embodiment.

[0051] In this application embodiment, the number of nouns, unless otherwise specified, refers to "singular nouns or plural nouns," that is, "one or more." "At least one" means one or more, and "more than one" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, or B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the related objects before and after are in an "or" relationship. For example, A / B means: A or B. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c means: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, and c can be single or multiple.

[0052] The ordinal numbers such as "first" and "second" mentioned in the embodiments of this application are used to distinguish multiple objects, and are not used to limit the size, content, order, timing, priority, or importance of the multiple objects. For example, the first resource and the second resource can be the same resource or different resources, and such names do not indicate that the two resources are different in position, size, priority, or importance. In addition, the numbering of steps in the various embodiments described in this application is only to distinguish different steps, and is not used to limit the order of steps. For example, step S401 may occur before step S402, or may occur after S402, or may occur simultaneously with S402.

[0053] The purpose of DRX is to allow the UE to enter a sleep state when there is no data or the data demand is small, i.e., a non-receiving state, thereby reducing power consumption caused by demodulating downlink signals. In base station and UE communication, DRX is typically implemented as follows: Figure 1A As shown. First, the base station configures DRX parameters for the UE. The UE determines when to enter sleep mode and when to enter receive / listen mode based on the DRX parameters, thereby saving power through sleep mode. At this time, as... Figure 1BAs shown, the base station will send downlink signals, such as downlink data or downlink control information, to the UE when the UE is in DRX active time, and will not send downlink data or downlink control information to the UE when the UE is in sleep mode. DRX active time includes, for example, DRX onduration or DRX active time (or DRX active state). The DRX active time and sleep time adopt time-division multiplexing (TDM) mode.

[0054] Building upon DRX, to further conserve power and reduce the duration of DRX active time, a WUS (Wake-Up Indicator) is introduced. This WUS indicates whether the UE should wake up during the current DRX period (DRX onDuration or DRX active time) before the DRX onDuration or DRX active time begins. Currently, base stations use a 1-bit wake-up indication within the Physical Downlink Control Channel (PDCCH) format 2_6. If the wake-up indication is set to "1", it indicates wake-up or PDCCH listening; if it is set to "0", it indicates continued sleep or no PDCCH listening. The base station also configures the specific location of the wake-up indication within PDCCH format 2_6 via radio resource control (RRC) signaling. Thus, the UE can determine whether to wake up during the next DRX active time or DRX onduration based on whether the wake-up indication carried in the monitored PDCCH format 2_6 is set to 1. (For example, see reference...) Figure 2 If the WUS indicates to listen to the PDCCH before the first DRX cycle, the UE will wake up during the DRX on duration of the first DRX cycle to listen to the PDCCH; if the WUS indicates not to listen to the PDCCH before the second DRX cycle, the UE will continue to sleep during the DRX on duration of the second DRX cycle.

[0055] In side-by-side communication scenarios, UEs can also transmit WUS. Multiple UEs may transmit WUS, and different UEs will transmit WUS on different resources. Even for the same UE, the resources used for WUS transmission may change because other UEs may preempt these resources. This requires UEs detecting WUS to perform detection on more resources, increasing UE power consumption and the difficulty of detection.

[0056] Therefore, the technical solution of this application embodiment is provided. In this application embodiment, the configuration information can be used to configure the resources for transmitting WUS sequences, so that each UE can determine the first resource according to the configuration information, which is equivalent to making the resource position of the WUS sequence relatively fixed. For the UE detecting the WUS sequence, it only needs to detect on the first resource, without needing to detect on more resources, which helps to reduce the power consumption of the UE detecting WUS and also reduces the detection difficulty for the UE.

[0057] The technical solutions provided in this application can be applied to fourth-generation (4G) mobile communication systems, such as Long Term Evolution (LTE) systems, or to 5G systems, such as New Radio (NR) systems, or to next-generation mobile communication systems or other similar communication systems, without specific limitations. Furthermore, the technical solutions provided in this application can be applied to device-to-device (D2D) scenarios, such as NR-D2D scenarios, or to vehicle-to-everything (V2X) scenarios, such as NR-V2X scenarios. For example, they can be applied to vehicle-to-everything (V2X) networks, such as V2X, vehicle-to-vehicle (V2V) networks, or to fields such as intelligent driving, assisted driving, or intelligent connected vehicles. If applied to a D2D scenario, both communicating parties can be UEs (User Equipment). In the following description, the example of communicating parties being a network device and a UE is used.

[0058] Please see Figure 3 This is one application scenario of an embodiment of this application. Figure 3 This includes UE1 and UE2. The relationship between these two UEs and the network device is not restricted, therefore the network device is not shown in the diagram. For example, both UEs may be within the coverage area of ​​the network device, or one UE may be within the coverage area of ​​the network device while the other is outside its coverage area, or both UEs may be outside the coverage area of ​​the network device.

[0059] The network device is, for example, a base station. The network device corresponds to different devices in different systems; for example, in a 4G system it may correspond to an eNB, and in a 5G system it may correspond to a 5G network device, such as a gNB. In a 5G system, the network device can also be a device that combines LTE and NR network devices, forming a mixed radio-dual connectivity (MR-DC) with the terminal device. Of course, the technical solutions provided in this application can also be applied to future mobile communication systems, so the network device can also correspond to network devices in future mobile communication systems. As mentioned above, the network device is a base station; however, referring to the preceding description, the network device can also be an RSU (Radio Service Unit), etc.

[0060] The technical solutions provided by the embodiments of this application are described below with reference to the accompanying drawings. It should be noted that in the accompanying drawings corresponding to the various embodiments of this application, all steps indicated by dashed lines are optional steps.

[0061] This application provides a first communication method, please refer to [link to relevant documentation]. Figure 4 Here is a flowchart of the method. In the following description, this method will be applied to... Figure 2 The network architecture shown is an example. The first UE described below is, for example, a... Figure 2 In the network architecture shown, UE1, and the second UE described below, are, for example, UE1. Figure 2 UE2 in the network architecture shown.

[0062] S401, The first UE obtains configuration information. This configuration information can be used to configure the first resource, and the first resource can be used to send WUS sequences.

[0063] For example, if the configuration information is sent by the network device, then S401 specifically involves the network device sending the configuration information to the first UE, and the first UE receiving the configuration information from the network device. Alternatively, the configuration information can be sent by another UE, such as the second UE, then S401 specifically involves the second UE sending the configuration information to the first UE, and the first UE receiving the configuration information from the second UE. Here, the first UE is the sender of the WUS sequence, and the second UE is the receiver of the WUS sequence. Alternatively, the configuration information can also be pre-configured in the first UE, then S401 specifically involves the first UE obtaining the pre-configured configuration information. Alternatively, the configuration information can also be predefined by the protocol, then S401 specifically involves the first UE obtaining the protocol-predefined configuration information. Alternatively, the configuration information can also be determined by the first UE itself, for example, the first UE can determine the configuration information based on information such as DRX parameters. If the configuration information is sent by the second UE to the first UE, then optionally, the second UE can obtain the configuration information from the network device, or the configuration information can be pre-configured in the second UE.

[0064] The configuration information may include time-domain information, frequency-domain information, and at least one piece of information from the first cycle of the first resource.

[0065] The time-domain information of the first resource includes, for example, the number of orthogonal frequency division multiplexing (OFDM) symbols occupied by the first resource, and / or, a first offset, which is the offset of the first resource within a first period (or, the first offset is the offset of the time slot occupied by the first resource within a first period). The number of OFDM symbols occupied by the first resource, for example, is the number of OFDM symbols occupied by the first resource within a first period. For example, if the first period is one time slot, then the number of OFDM symbols occupied by the first resource refers to the number of OFDM symbols occupied by the first resource within one time slot. For simplicity, "OFDM symbol" will be abbreviated as "symbol" below. The offset of the first resource within the first period refers to the offset of the resources included in the first resource within that first period within that first period. The offset of a resource within the first period is, for example, the offset of the time-domain position of the resource relative to the reference time-domain position within the first period. For example, if the first period has 10 time slots, and the reference time domain position is the Tth time slot out of these 10 time slots, and the first offset of the first resource within the first period is 2 time slots, then the starting time slot of the first resource within the first period can be determined as the (T+2)th time slot within that time slot. For example, if the first resource occupies 4 time slots within the first period, then the (T+2), (T+3), (T+4), and (T+5)th time slots within that time slot can belong to the first resource.

[0066] The frequency domain information of the first resource includes, for example, the number of sub-channels occupied by the first resource, and / or the frequency domain position of the sub-channels occupied by the first resource. Optionally, if the number of sub-channels occupied by the first resource is 1, then the frequency domain information of the first resource may not include the number of sub-channels occupied by the first resource. Because the number of sub-channels and the frequency domain position occupied by the first resource are the same in each first period, the number of sub-channels occupied by the first resource and the number of sub-channels occupied by the first resource in a first period are the same concept; similarly, the frequency domain position of the sub-channels occupied by the first resource and the frequency domain position of the sub-channels occupied by the first resource in a first period are also the same concept.

[0067] The first period is the period in the time domain in which the resources for transmitting the WUS sequence appear; in other words, the first period can be used to determine the location of the resources for transmitting the WUS sequence in the time domain. For example, the sideline resource reservation period list (sl-ResourceReservePeriodList), which is a higher-layer parameter, can be configured as a list containing N rsv_period Each entry in the list is indicated by bit information provided by the resource reservation period. This entry indicates the first period, thus allowing us to obtain the value of the first period. For example, if the first entry in the list corresponds to a period of 10 time slots, and the second entry corresponds to a period of 20 time slots, and the bit information provided by the resource reservation period indicates the first entry, then it can be determined that the resources occupied by the service or transmission occur in periods of 10 time slots. That is, the first period (or the duration of the first period) is determined to be 10 time slots. Each first period may include resources for transmitting WUS sequences, and at least one resource included in a first period for transmitting WUS sequences can be considered a first resource. For example, if the first period is one time slot, then each time slot may include resources for transmitting WUS sequences, and at least one resource included in a time slot for transmitting WUS sequences can be considered a first resource.

[0068] Optionally, this configuration information may also include a second period. The duration of the second period can be longer than the duration of the first period; for example, the duration of the second period may be a multiple of the duration of the first period, or one second period may include one or more first periods. The resources included in the second period for transmitting WUS sequences are the same as the resources included in multiple first periods for transmitting WUS sequences. For example, see [reference needed]. Figure 5A The second cycle is four times the length of the first cycle. For example, if the first cycle is one time slot, then the second cycle is four time slots. Of course... Figure 5A This is merely an example; the embodiments of this application do not limit the number of first periods included in a second period.

[0069] Introducing a second period can expand the channel capacity of the WUS channel. Without a second period, the channel capacity of the WUS channel is the same as that within a single first period; calculating the channel capacity only considers the symbols occupied by the WUS channel within the first period. However, with the second period, the channel capacity becomes the same as that within a single second period. Calculating the channel capacity now considers the symbols occupied by the WUS channel within the second period, which is significantly more than the number of symbols occupied in the first period. Therefore, this expands the channel capacity. Furthermore, introducing a second period may change the time-domain position of the WUS sequence transmission by the first UE. For example, before the second period, the first UE transmits the WUS sequence according to the first period. If the first period is one time slot, the first UE can transmit the WUS sequence in each of several consecutive time slots. However, with the second period, the first UE must transmit the WUS sequence according to the second period. For example, if the first period has one time slot and the second period has four time slots, then the first UE can only transmit the WUS sequence in one of the four time slots, and will not transmit the WUS sequence in the remaining three time slots. These remaining three time slots can be allocated to other UEs, for example, to three UEs, each occupying one time slot to transmit WUS. In this way, the channel capacity of the WUS channel can be improved, and time-division multiplexing can be achieved among UEs, reducing interference.

[0070] It is important to note that, as mentioned earlier, resources used for sending WUS sequences within at least one first period can be considered first resources. If a second period is not introduced, then at least one first period can be continuous, for example... Figure 5A If the second period is not considered, then at least one first period may include Figure 5A The eight first cycles may also include Figure 5A The first period is not shown in the diagram. With the introduction of the second period, at least one first period may be discontinuous. For example, at least one first period may include... Figure 5A The first second cycle in the mid-time domain includes one of the four first cycles, for example, the first first cycle of these four cycles, and also includes... Figure 5A The second second cycle in the mid-time domain includes the first of four first cycles, and additionally in Figure 5A After the second second cycle ends, the next second cycle will continue. Therefore, at least one first cycle can also include the first first cycle within the next second cycle, and so on.

[0071] In addition to the resources used by the first UE to transmit WUS sequences, the first resource may also include resources used by other UEs to transmit WUS sequences. For example, the first resource may include resources for transmitting WUS sequences in four consecutive time slots, which belong to the second period. Of these four time slots, only the resources for transmitting WUS sequences in the first time slot are available to the first UE; the resources in the remaining three time slots are unavailable to the first UE, for example, they may have been allocated to other UEs. Therefore, the time-domain information of the first resource included in the configuration information sent to the first UE may also include a second offset. The second offset may indicate the offset of the resources allocated to the first UE for transmitting WUS sequences within the second period, or indicate the position of the resources allocated to the first UE for transmitting WUS sequences within the second period. That is, the second offset may indicate which first period's resources within the second period are used by the first UE for transmitting WUS sequences. The position indicated by the second offset may be different in the configuration information obtained by different UEs, thus allowing different UEs to transmit WUS sequences in different first periods within the second period.

[0072] S402, the first UE sends a first WUS sequence in the second resource. Correspondingly, the second UE listens for the first WUS sequence in the second resource.

[0073] The second resource is included, for example, in the first resource. As described above, at least one resource included in the first period for transmitting the WUS sequence can belong to the first resource, while one of the resources included in the first period for transmitting the WUS sequence is the second resource.

[0074] The first WUS sequence is, for example, a WUS sequence transmitted within a first period. The first UE can determine the resource identifier of the WUS channel used to carry the first WUS sequence based on configuration information. Based on this resource identifier, it can determine one or more of the time-domain resources, frequency-domain resources, or code-domain resources used to transmit the first WUS sequence. Thus, the first WUS sequence can be transmitted through the determined resources; for example, the resource determined by the first UE is the second resource. For example, the WUS channel used to carry the first WUS sequence is called the first WUS channel. As one way for the first UE to determine the resource identifier of the first WUS channel based on configuration information, the first UE can determine the channel capacity of the first WUS channel based on the configuration information, and then further determine the resource identifier of the first WUS channel based on the channel capacity.

[0075] For example, if the configuration information specifies the time-domain information, frequency-domain information, and first period of the first resource, but does not specify the second period, then the first UE can determine the channel capacity of the first WUS channel based on the time-frequency domain information and code-domain information of the first resource. The code-domain information of the first UE can be configured through the configuration information, or it can be predefined by the protocol, or it can be pre-configured in the first UE. For example, the channel capacity of the first WUS channel satisfies the following relationship:

[0076] Channel capacity of the first WUS channel = time-frequency domain information × code domain information (Formula 1)

[0077] In Formula 1, the time-frequency domain information refers to the time-frequency domain information of the first resource or the time-frequency domain information of the first WUS channel. For example, the time-frequency domain information of the first WUS channel could be the number of physical resource blocks (PRBs) occupied by the first WUS channel. A PRB is a time-frequency domain resource consisting of a resource block (RB) in the frequency domain and a symbol in the time domain. The code domain information in Formula 1 refers to the code domain information of the first resource or the code domain information of the first WUS channel. For example, this code domain information could be the number of sequences that can be carried on a PRB.

[0078] Based on Formula 1, the first UE can further determine the channel capacity of the first WUS channel based on the time-domain information, frequency-domain information, and code-domain information of the first resource. Alternatively, the first UE can determine the channel capacity of the first WUS channel based on the time-domain information, frequency-domain information, code-domain information, and the first period of the first resource. For example, if the number of frequency-domain resources occupied by the first WUS channel is the same for each time-domain resource, then the channel capacity of the first WUS channel can satisfy the following relationship:

[0079] Channel capacity of the first WUS channel = M × H × K × P (Formula 2)

[0080] Where M represents the number of sub-channels included in the first WUS channel. H represents the number of RBs included in a sub-channel. Here, RB is a frequency domain concept, while PRB refers to a resource consisting of an RB in the frequency domain and a symbol in the time domain. H is a concept related to sub-channels. Sub-channels are frequency domain concepts, so H is measured by RBs. K represents the number of symbols occupied by the first WUS channel. For example, K represents the number of symbols occupied by the first WUS channel in a first period, or the number of symbols used to transmit WUS sequences in a first period. For example, if the first period has 4 time slots, then K represents the number of symbols occupied in the time slot where the first WUS channel is located within the 4 time slots. P represents the number of WUS sequences that a PRB can carry. M, H, and K are all positive integers, and P is a positive integer less than or equal to 12. For example, P may take values ​​of 2, 3, 4, 6, etc. Formula 2 can be included in Formula 1. For example, M×H×K can represent the time-frequency domain information of the first resource. Furthermore, the frequency domain information of the first resource may include the value of M, and the value of H may also be included in the frequency domain information of the first resource, or the value of H may be determined in other ways, such as through protocol predefinition. The time domain information of the first resource may include the value of K. The value of P belongs to the code domain information of the first resource.

[0081] For example, if the configuration information specifies the time-domain information, frequency-domain information, first period, and second period of the first resource, then the first UE can determine the channel capacity of the first WUS channel based on the time-domain information, frequency-domain information, code-domain information, first period, and second period of the first resource. For instance, the channel capacity of the first WUS channel satisfies the following relationship:

[0082] Channel capacity of the first WUS channel = M × H × K × P × N (Formula 3)

[0083] The explanations of M, H, K, and P can be found in the previous text. N represents the number of first periods included in a second period, and N is a positive integer. For example, if the second period has 4 time slots and the first period has 1 time slot, then N = 4. Formula 3 can be included in Formula 1. For example, M × H × K × N can represent the time-frequency domain information of the first resource.

[0084] For example, with the introduction of a second period, M=1, H=10, K=10, P=6, N=4, then according to Formula 3, the channel capacity of the first WUS channel is 2400. For another example, without the second period, M=1, H=10, K=10, P=6, then according to Formula 2, the channel capacity of the first WUS channel is 600. It can be seen that without the second period, the channel capacity of the WUS channel is the channel capacity of the WUS channel within one first period. In this case, the calculation of the WUS channel capacity only considers the symbols occupied by the WUS channel within one first period, i.e., only K is considered. However, with the introduction of the second period, the channel capacity of the WUS channel becomes the channel capacity of the WUS channel within one second period. In this case, the calculation of the WUS channel capacity considers the symbols occupied by the WUS channel within one second period, i.e., K×N is considered. And when N is greater than 1, K×N is greater than K, therefore, the channel capacity of the WUS channel can be increased in this way.

[0085] After determining the channel capacity of the first WUS channel, the first UE can determine the resource identifier of the first WUS channel based on its channel capacity. For example, the resource identifier of the first WUS channel satisfies the following relationship:

[0086] Resource number of the first WUS channel = first identifier mod (channel capacity of the first WUS channel) (Formula 4)

[0087] The first identifier corresponds to, for example, the first WUS sequence, or in other words, the first identifier can indicate the first WUS sequence. `mod` represents the modulo operation. According to Formula 4, the first UE can determine the resource number of the first WUS channel, thereby determining the location of the first WUS channel, so as to transmit the first WUS sequence through the first WUS channel.

[0088] Alternatively, if the first identifier is the resource number of the first WUS channel, then the first UE does not need to use Formula 4, but obtains the resource number of the first WUS channel after obtaining the first identifier. For example, the number of first identifiers is less than the channel capacity of the first WUS channel.

[0089] For example, if the resource number of the first WUS channel is 45, such as M=1, H=10RB, K=10 symbols, P=6, then M×H×K is a total of 100 time-frequency resources, and each time-frequency resource can carry P time slots. Remainder 3, that is, the third sequence is used on the 7th time-frequency resource. The 7th time-frequency resource is located on the first RB of the 7th symbol (time domain priority), so the first UE can determine the resource used to transmit the first WUS sequence as "the third sequence on the first RB of the 7th symbol of the first WUS channel" according to the resource identifier of the first WUS channel; or, the 7th time-frequency resource is located on the first symbol of the 7th RB (frequency domain priority), so the first UE can determine the resource used to transmit the first WUS sequence as "the third sequence on the 7th RB of the 1st symbol of the first WUS channel" according to the resource identifier of the first WUS channel.

[0090] The previous section described how the first UE determines the resource identifier of the first WUS channel. For the second UE (i.e., the receiver of the first WUS sequence), it is also necessary to determine the resource identifier of the first WUS channel. The method used by the second UE to determine the resource identifier of the first WUS channel is similar to that of the first UE. For example, it also determines the channel capacity of the first WUS channel based on the configuration information, and then further determines the resource identifier of the first WUS channel based on the channel capacity. The specific method used by the second UE in this process can also be the same as that used by the first UE, so it will not be elaborated further.

[0091] Formula 4 involves a first identifier, which corresponds to a first WUS sequence. In this embodiment, the first resource may be shared; that is, multiple UEs may be allocated the first resource to transmit WUS sequences. To reduce interference, identifiers for WUS sequences can be assigned to UEs, or the identifiers for WUS sequences can be determined based on the UE's identifier. Different UEs may have different identifiers (WUS sequence identifiers), thus allowing different UEs to transmit different WUS sequences, thereby achieving differentiation of WUS sequences in the code domain. For example, different WUS sequences can be orthogonal, so even if different WUS sequences are transmitted on the same time-frequency resource, the interference between these WUS sequences can be reduced, improving the transmission quality of WUS sequences. Optionally, to reduce collisions, the number of WUS sequence identifiers can be less than or equal to the upper limit of the channel capacity of the WUS channel.

[0092] The first UE can obtain the first identifier in several different ways. One common method is for the network device to send the first identifier to the first UE; the first UE then receives the first identifier from the network device, thus acquiring the first identifier. The first identifier may be included in the configuration information and sent together, or it may be sent through other messages instead of being included in the configuration information. The first identifier may be related to the first UE and / or the second UE; for example, the first identifier may be the identifier of the first UE, or the identifier of the second UE, or it may be a concatenation of the identifiers of the first UE and the second UE.

[0093] As a second method for the first UE to obtain the first identifier, the first UE can obtain the first identifier based on the first information. For example, the second UE sends the first information to the first UE, and the first UE can then receive the first information from the second UE. The first information is related to the second UE; for example, the first information is the identifier of the second UE, or the first information is a DRX parameter, which may include, for example, the DRX connection ID. The DRX connection ID may include a source ID and a destination ID. For example, for the first UE and the second UE as a pair of communicating UEs, the source ID is the ID of the first UE, and the destination ID is the ID of the second UE. The first information is related to the identifier of the second UE; for example, the first information includes the destination ID. The first UE may directly use the first information as the first identifier, or the first UE may also process the first information accordingly to obtain the first identifier; for example, the first UE may use a portion of the first information as the first identifier.

[0094] As a third way for the first UE to obtain the first identifier, the first UE can determine the first identifier based on first parameter information and second parameter information. The first parameter information may come from a network device; for example, if the network device sends the first parameter information to the first UE, then the first UE obtains the first parameter information by receiving it from the network device. The first parameter information may be included in the configuration information and sent together, or it may not be included in the configuration information but sent through other messages. The first parameter information may be, for example, an identifier for a first service, or it may be a DRX parameter. For example, the DRX parameter may include a source ID, which corresponds to the ID of the first UE. The first service is the service performed by the first UE. For example, the first UE sends a first WUS sequence to wake up a second UE, and the purpose of waking up the second UE is to perform the first service. Alternatively, the first service may also be other services performed by the first UE. The second parameter information may come from a higher layer of the first UE; for example, the higher layer of the first UE sends the second parameter information to the physical layer of the first UE, thus the first UE obtains the second parameter information. The higher layer of the first UE may be, for example, the media access control (MAC) layer or the application layer of the first UE. The second parameter information may be, for example, the identifier of the first UE, or it may be other information. The first UE can concatenate the first parameter information and the second parameter information to form a first identifier; or, the first UE can concatenate a portion of the first parameter information with the second parameter information to form a first identifier; or, the first UE can concatenate a portion of the second parameter information with the first parameter information to form a first identifier; or, the first UE can concatenate a portion of the second parameter information with a portion of the first parameter information to form a first identifier, etc. The embodiments of this application do not limit the way in which the first UE obtains the first identifier based on the first parameter information and the second parameter information.

[0095] As a fourth method for the first UE to obtain the first identifier, the first UE can obtain the first identifier based on the DRX parameter. For example, the first UE can obtain the first identifier based on the source ID and / or the target ID. For example, the first UE can use the source ID or the target ID as the first identifier; or, the first UE can concatenate the source ID and the target ID to use as the first identifier, etc. The embodiments of this application do not limit the method by which the first UE obtains the first identifier based on the DRX parameter. Alternatively, the first UE can use partial information from the DRX parameter as the first identifier.

[0096] In addition to the methods described above, the first UE may also obtain the first identifier through other methods, without any restrictions.

[0097] The second UE also needs to obtain the first identifier because it needs to receive the first WUS sequence. The second UE can obtain the first identifier in the same way as the first UE, or the first UE can send the first identifier to the second UE after obtaining it, thus the second UE obtains the first identifier. For example, the first UE can send the first identifier to the second UE through MAC layer information or SCI (e.g., SCI 2) messages.

[0098] In this embodiment, multiple UEs can obtain configuration information, allowing each UE to determine the first resource based on the configuration information. However, legacy UEs may not be able to recognize the configuration information, and thus may not know that the first resource is used to transmit WUS sequences, potentially preempting the first resource to transmit other information. To reduce resource collisions, optionally, the first UE can also execute S403: the first UE sends a first message, which can be used to reserve resources for transmitting WUS sequences. The first message may reserve one or more first periods, or reserve resources for transmitting WUS sequences within one or more first periods, for example, the first message carries parameters indicating the first period; or, the first message may reserve one or more second periods, or reserve resources for transmitting WUS sequences within one or more second periods, for example, the first message carries parameters indicating the second period. The resources reserved in the first message are determined based on the configuration information, that is, the first UE determines the first resource for transmitting WUS sequences based on the configuration information, and can reserve part or all of the first resource through the first message.

[0099] Besides the first UE, other UEs may also send reservation messages. For example, if these UEs send reservation messages simultaneously, and the first UE also sends the first message simultaneously, then the first message and these reservation messages can be superimposed at the signal layer, thereby expanding the transmission range and allowing more UEs to know the resource reservation status, reducing resource collisions over a larger area. For multiple messages to be superimposed, the content of the multiple messages must be identical. For example, if these multiple messages are all used to reserve all the first resources, then the content of the multiple messages is identical. The content of two messages must be identical, for example, including the same information carried by both messages for reserving resources, such as the reservation period (i.e., how many periods of resources are reserved). Since the content of multiple messages is identical, the signals after encoding this content are also identical. Therefore, if these encoded signals are sent on the same resource, they will not interfere with each other and can achieve the superposition effect. As mentioned above, the first resource may include resources allocated to multiple UEs. For a UE, although it has reserved the first resource, when sending the WUS sequence, it only needs to send the WUS sequence on the resource allocated to that UE. This allows messages used for resource reservation to be superimposed, and prevents different UEs from competing for resources.

[0100] For example, a second UE can receive the first message. Besides the second UE, other UEs may also be able to receive the first message, such as a UE currently monitoring. If a legacy UE receives the first message, it can clearly identify the resource reserved by the first message. For example, if the first message reserves a second resource, the legacy UE can stop preempting the second resource to reduce resource collisions. Therefore, by sending the first message, the technical solution of this application embodiment can be made compatible with legacy UEs, making the application scope of this application embodiment wider. The first message is used to reserve resources; therefore, the first message can also be called a reservation message, or it can have other names. Reservation can be understood as holding or reserving, meaning preemptively reserving and notifying other UEs that it cannot occupy the resource. The first message can be, for example, sidelink control information (SCI), such as the first-level SCI (SCI 1), or it can be other types of messages.

[0101] Generally, messages used for reserving resources carry priority information, which indicates the priority of the information sent for the resource to be reserved through the message. The first message is for reserving resources, therefore it can also carry priority information, indicating the priority of the WUS sequence. To reduce the probability of other UEs continuing to preempt the first resource after receiving the first message, optionally, the priority information carried in the first message can indicate a higher priority, for example, the highest priority. Alternatively, the priority information carried in the first message can indicate a preset priority, for example, predefined by the protocol. Or, the protocol can predefine a lower priority limit, and the priority information carried in the first message can indicate a priority higher than or equal to this lower priority limit. In this way, after receiving the first message, other UEs can determine that the resource reserved in the first message cannot be preempted based on this priority information, thereby further reducing the probability of resource collisions. Optionally, the lower priority limit can be, for example, a priority value limited by preemption, such as the priority value carried as a higher-layer parameter in side-by-side preemption enable version 16 (sl-PreemptionEnable-r16). The priority information carried by the first message can be less than or equal to the priority value carried by the higher-level parameter. That is, the priority indicated by the priority information carried by the first message is equal to or higher than the priority corresponding to sl-PreemptionEnable-r16.

[0102] Another point to note is that for the UE, when using the resource pool for random selection, or in other words, when selecting resources from that pool, it is not necessary to listen to the physical sidelink control channel (PSCCH); instead, it selects directly. Therefore, if the first resource is located in that resource pool, legacy UEs will not listen to it, and there is still a risk of resource collision. Given this, optionally, the first resource and the resource pool for random selection can be non-overlapping, or in other words, the first resource may not belong to the resource pool for random selection. This forces the UE to listen before selecting the first resource, thus reducing resource collisions.

[0103] Alternatively, besides the resource pool used for random selection, the UE may not need to listen to the PSCCH when using other resource pools. To further reduce the risk of resource collisions, optionally, the first resource may not overlap with the first resource pool, or in other words, the first resource may not belong to the first resource pool. In this case, the UE will not listen to the PSCCH when selecting resources within the first resource pool. For example, the first resource pool may include the resource pool used for random selection, and may also include other resource pools; this application embodiment does not impose any limitations.

[0104] The resources reserved by the first message could be, for example, the resources on the WUS channel, or the resources on the WUS channel used to carry WUS sequences. Besides carrying WUS sequences, the WUS channel may also carry other information; in other words, the WUS sequences may occupy part of the WUS channel's resources, while there are remaining resources unused by the WUS sequences. Therefore, the first message can reserve resources on the WUS channel, or it can reserve resources on the WUS sequence; there is no restriction on the granularity of the resources reserved by the first message.

[0105] For example, the first UE can send the first message first, and then send the first WUS channel after the first message is sent. In this case, the first WUS channel can occupy the time domain resources following the time domain resources where the first message is located. Alternatively, the first UE can also send the first message on the first WUS channel. In this case, the first WUS channel can occupy the time domain resources where the first message is located. The implementation method of the first WUS channel occupying the time domain resources where the first message is located is described below.

[0106] Generally, the first symbol used in a channel is the Automatic Gain Control (AGC) symbol, which is used by the UE (User Equipment) to adjust the received power. Therefore, the first symbol of the first WUS channel can be used to carry AGC, or in other words, the first symbol of the first WUS channel is the AGC symbol. For example, the content carried by the first symbol of the first WUS channel could be a repetition of the content carried by the Y-th symbol of the first WUS channel, where Y is, for example, 2, or it could be any other value.

[0107] As can be seen, the first symbol of the first WUS channel is occupied by AGC. Therefore, the first WUS channel occupies the time-domain resources of the first message. For example, in one implementation, the first message occupies the second symbol of the first WUS channel. The first message can occupy one or more symbols; for example, the first message can occupy the second and third symbols of the first WUS channel, or it can occupy more symbols. The first message may reserve resources for transmitting WUS sequences in the next first period or the next second period, or it may reserve resources for transmitting WUS sequences in multiple first periods or multiple second periods. In addition, the first WUS channel also carries the first WUS sequence. The first WUS sequence is time-division multiplexed with the first message, that is, after the symbol where the first message is located, the first WUS channel carries the first WUS sequence, and the first WUS sequence can occupy one or more symbols. See [reference needed] for more details. Figure 5B ,exist Figure 5B In the first WUS channel, AGC occupies the first symbol, and the first message follows AGC. Figure 5BTaking SCI1 as the first message as an example, the first WUS sequence follows SCI1. SCI1, for example, is used to reserve resources for sending WUS sequences in the next first period, such as reserving the resources for the WUS channel in the next first period. Figure 5B A box marked with a backslash "\" represents a WUS sequence, and a box marked with a forward slash " / " represents a message used to reserve resources. For example, the first box marked with a forward slash " / " represents the first message.

[0108] Alternatively, the first WUS sequence may also occupy the symbol containing the first message; that is, the first WUS sequence and the first message can be frequency-division multiplexed. If this method is adopted, the first WUS sequence can occupy other symbols besides the symbol containing the first message. For example, after the symbol containing the first message, the first WUS channel continues to carry the first WUS sequence. This means that the first WUS sequence can occupy both the symbol containing the first message and the symbols following the first message. Taking SCI 1 as an example, this means that the PRBs not occupied by SCI 1 on the symbol containing SCI 1 can also be used to carry the first WUS sequence. For example, based on the value of H, the number of PRBs occupied by SCI 1, and the number of symbols occupied by SCI 1, the number of remaining available PRBs on the symbol occupied by SCI 1 can be determined. Some or all of these available PRBs can be used to carry the first WUS sequence. This method can improve the channel capacity of the first WUS channel.

[0109] For example, refer to Figure 5C This is an example of the frequency domain resources occupied by the WUS channel on the symbol where the SCI is located. Figure 5C A time slot is given, where the box marked with "\" represents the resources occupied by the WUS channel. Additionally, the 12th and 13th symbols of this time slot are for the sideline feedback channel. Figure 5C (Taking the side feedback channel as an example, which is PSFCH) is the symbol.

[0110] Considering that the first WUS sequence occupies unoccupied resources (e.g., the PRB on the symbol where SCI 1 is located that is not occupied by SCI 1), the formula for the channel capacity of the first WUS channel can be improved. For example, based on Formula 2 and considering the actual resources occupied by the first WUS sequence, the channel capacity of the first WUS channel can satisfy the following relationship:

[0111] Channel capacity of the first WUS channel = M × H × K × PF (Formula 5)

[0112] Alternatively, the channel capacity of the first WUS channel can satisfy the following relationship:

[0113] Channel capacity of the first WUS channel = (M × H × KF′) × P (Formula 6)

[0114] If we consider N, then, for example, based on Equation 3 and considering the resources actually occupied by the first WUS sequence, the channel capacity of the first WUS channel can satisfy the following relationship:

[0115] Channel capacity of the first WUS channel = M × H × K × P × NF (Formula 7)

[0116] Alternatively, the channel capacity of the first WUS channel can satisfy the following relationship:

[0117] Channel capacity of the first WUS channel = (M × H × K × NF′) × P (Formula 8)

[0118] In Formulas 5 to 8, F represents the number of time-frequency code domain resources occupied, that is, the total number of sequences occupied on a certain RB of a certain symbol. F′ represents the number of time-frequency resource PRBs occupied, that is, the number of occupied PRBs. It can be understood that the resources represented by F (or F′) are already occupied by other information, and the first WUS channel cannot be occupied. Therefore, they must be excluded when calculating the channel capacity of the first WUS channel. Both F and F′ are greater than or equal to 0. For an introduction to M, H, K, and P, please refer to the previous text. The occupied resources are, for example, occupied by SCI 1 sent by the first UE, or occupied by other information sent by the first UE, or may also be occupied by information sent by other UEs.

[0119] As an optional implementation, the WUS channel can occupy the last symbol within a time slot. For example, the first WUS channel can occupy the last symbol within a time slot. The first WUS channel is included in the second resource, so the second resource can also be considered to occupy the last symbol within a time slot. The last symbol within a time slot is generally used for transmit / receive switching and is therefore unoccupied. The WUS channel can then occupy this symbol to improve resource utilization. The WUS channel can occupy only the last symbol within a time slot, or it can occupy other symbols. For example, in addition to occupying the last symbol within a time slot, the WUS channel can also occupy some or all of the symbols of the sidelink feedback channel, such as the physical sidelink feedback channel (PSFCH). In a time slot, the PSFCH typically occupies the 12th and 13th symbols. Optionally, the WUS channel can occupy the first symbol of the PSFCH, i.e., the 12th symbol within a time slot. In this implementation, the WUS channel can occupy the 12th and 14th symbols within a time slot. For example, the first WUS channel can occupy the 12th and 14th symbols within a time slot. The first WUS channel is included in the second resource, so the second resource can also be considered to occupy the 12th and 14th symbols within a time slot. The 12th symbol within a time slot is generally also used as the AGC symbol. Therefore, if the 12th symbol is occupied by the WUS channel, the content carried by the 12th symbol can be a repetition of the content carried by the 14th symbol (i.e., the last symbol in that time slot). Generally speaking, if the WUS channel occupies only one symbol without an AGC symbol, the receiving UE (e.g., the second UE) may not have enough time to perform processes such as receiving power adjustment. Therefore, the WUS channel can occupy the 12th and 14th symbols within a time slot.

[0120] If this approach is adopted, the WUS channel can be deployed only in time slots with a side feedback channel. For time slots without a side feedback channel, the WUS channel may not be included; that is, these time slots do not include resources for transmitting WUS sequences. Alternatively, a WUS channel can be included in time slots without a side feedback channel, and the WUS channel can occupy the 12th and 14th symbols in these time slots. In this case, because the time slot does not include a side feedback channel, the 12th symbol in that time slot cannot be considered the first symbol of the side feedback channel. In other words, if the WUS channel is included in a time slot with a side feedback channel, the WUS channel occupies the 12th symbol in that time slot, and the 12th symbol in that time slot is also the first symbol of the side feedback channel. However, if the WUS channel is included in a time slot without a side feedback channel, the WUS channel occupies the 12th symbol in that time slot, and the 12th symbol in that time slot is not a symbol occupied by the side feedback channel.

[0121] For example, refer to Figure 5D This is an example of a WUS channel occupying the 12th and 14th symbols. Figure 5D A time slot is given, where the box marked with "\" represents the resources occupied by the PSSCH channel, and the box marked with " / " represents the resources occupied by the WUS channel. Additionally, the 12th and 13th symbols of this time slot are for the sideline feedback channel. Figure 5D Taking the side feedback channel as an example (PSFCH), the 12th symbol is the AGC symbol.

[0122] In this approach, the number of symbols occupied by the WUS channel is considered to be 1. If the first UE or the second UE needs to determine the channel capacity of the first WUS channel, it can use any one of formulas 9 to 14 instead of formulas 2, 3, and 5 to 8. Without configuring a second cycle, the channel capacity of the first WUS channel can satisfy the following relationship:

[0123] The channel capacity of the first WUS channel = M × H × P (Formula 9)

[0124] With the second cycle configured, the channel capacity of the first WUS channel can satisfy the following relationship:

[0125] The channel capacity of the first WUS channel = M × H × P × N (Formula 10)

[0126] Furthermore, if the WUS channel occupies 1 symbol and no second cycle is configured, and considering the occupied resources, then the channel capacity of the first WUS channel can satisfy the following relationship:

[0127] Channel capacity of the first WUS channel = M × H × PF (Formula 11)

[0128] Alternatively, the channel capacity of the first WUS channel can satisfy the following relationship:

[0129] Channel capacity of the first WUS channel = (M × HF′) × P (Formula 12)

[0130] If the WUS channel occupies 1 symbol and a second cycle is configured, and considering the occupied resources, then the channel capacity of the first WUS channel can satisfy the following relationship:

[0131] Channel capacity of the first WUS channel = M × H × P × NF (Formula 13)

[0132] Alternatively, the channel capacity of the first WUS channel can satisfy the following relationship:

[0133] Channel capacity of the first WUS channel = (M × H × NF′) × P (Formula 14)

[0134] Where F represents the number of occupied resources, and F′ represents the number of occupied time-frequency resources (PRBs), both F and F′ are greater than or equal to 0. For an introduction to parameters such as M, H, P, and N, please refer to the previous text. To determine the resource label of the first WUS channel, please refer to Formula 4.

[0135] If the WUS channel occupies the symbol where the sideline feedback channel is located in a time slot, there may be some constraints on the UE that sends the WUS sequence (e.g., the first UE).

[0136] For example, the first UE needs to determine that there is no requirement to receive sideline feedback information in the 12th and 13th symbols of this time slot. The 12th and 13th symbols in the time slot are occupied by the sideline feedback channel. That is, if the first UE does not require to receive sideline feedback information on the sideline feedback channel in this time slot, then the WUS channel can occupy the symbol where the sideline feedback channel is located in this time slot. However, if the first UE requires to receive sideline feedback information on the sideline feedback channel in this time slot, then the WUS channel may not be able to occupy the symbol where the sideline feedback channel is located in this time slot. Sideline feedback information is, for example, a positive acknowledgment (ACK) or a negative acknowledgment (NACK) for sideline communication.

[0137] Alternatively, if the first UE requires receiving sideline feedback information in the 12th and 13th symbols of that time slot, then the first UE can further determine the relationship between the priority of the sideline feedback information to be received and the priority of the WUS sequence. If the priority of the sideline feedback information to be received is lower than the priority of the WUS sequence to be transmitted, then the first UE can transmit the WUS sequence; that is, the WUS channel can continue to occupy the sideline feedback channel in that time slot, and the first UE abandons receiving sideline feedback information in that time slot. Or, if the priority of the sideline feedback information to be received is higher than the priority of the WUS sequence to be transmitted, then the first UE can receive the sideline feedback information; that is, the WUS channel does not occupy the sideline feedback channel in that time slot, and the first UE abandons transmitting the WUS sequence in that time slot. If the priority of the sideline feedback information to be received is equal to the priority of the WUS sequence to be transmitted, then the first UE can transmit the WUS sequence in that time slot and abandon receiving the sideline feedback information, or it can abandon receiving the sideline feedback information and instead transmit the WUS sequence.

[0138] If the WUS channel occupies the last symbol in a time slot, there may be some constraints for both the sending UE (e.g., the first UE) and the receiving UE (e.g., the second UE) of the WUS sequence.

[0139] For example, because the last symbol in a time slot is used to transmit the WUS sequence, the first UE needs to use the first symbol (AGC symbol) of the next time slot for transmit / receive switching. Generally, the time for the UE to perform transmit / receive switching is less than one symbol. Therefore, the first UE can use part of the time of the AGC symbol in the next time slot for transmit / receive switching, while the remaining time of the AGC symbol can be used for AGC function. If there is insufficient time to use the remaining time of the AGC symbol for AGC, then the symbols after the AGC symbol in the next time slot (e.g., the second symbol in the next time slot) also need to be used for AGC, which may affect the first UE's receiving or detection behavior in the next time slot. However, if the first UE has a transmitting requirement but no receiving requirement in the next time slot, or has neither a transmitting nor receiving requirement in the next time slot, then since no transmit / receive switching is required, it has no impact on the first UE.

[0140] For the second UE, because it needs to receive the WUS sequence in the last symbol of a time slot, it cannot transmit in the first symbol of the next time slot. Therefore, by default, the second UE can only receive information and cannot transmit information in the next time slot.

[0141] In addition to being woken up by the WUS sequence, the second UE may remain awake in other situations, meaning it may need to remain awake even when it doesn't need to receive the WUS sequence. For example, if a time slot includes a sideline feedback channel that is not occupied by the WUS channel, and the second UE needs to send or receive sideline feedback information through this channel, then the second UE needs to wake up during the on-duration or active time of the next DRX cycle to send or receive sideline feedback information. Alternatively, if the second UE needs to send information in the time slot following the time slot containing the WUS sequence, then the second UE also needs to wake up during the on-duration or active time of the next DRX cycle.

[0142] WUS can be used to indicate whether the receiving UE is awake within the on duration or active time of a DRX cycle; that is, WUS is generally related to DRX. Therefore, optionally, the WUS channel can be located in the time domain within a first duration preceding the start time domain position of a DRX activation time. The DRX activation time is, for example, DRX on duration or DRX active time. For example, if the second resource includes the first WUS channel, then the first WUS channel (or the second resource) can be located in the time domain within a first duration preceding the start time domain position of a DRX activation time; the first duration can also be regarded as the WUS detection window.

[0143] For example, the first duration information may be included in the configuration information; alternatively, the first duration information may also be included in the DRX parameters; or the first duration information may be configured separately, for example, it may be predefined by the protocol or pre-configured in the first UE and the second UE. The first duration information may include, for example, time-domain information and / or frequency-domain information for the first duration. The time-domain information may include, for example, the start and end time-domain positions of the first duration, or the start and duration of the first duration, or the end and duration of the first duration, or an offset and duration, where the offset is the offset of the start or end time-domain position of the first duration relative to a reference time-domain position, such as the start time-domain position of the next DRX activation time after the current time. For example, the first duration may be 10 time slots, or it may be other lengths. For example, a reference... Figure 6 This is one example of a first duration. By configuring the first duration, the connection between WUS and DRX is made closer.

[0144] In this embodiment, the configuration information can be used to configure the resources for transmitting the WUS sequence, so that each UE can determine the first resource according to the configuration information, which is equivalent to making the resource position of the WUS sequence relatively fixed. For the UE detecting the WUS sequence, it only needs to detect on the first resource, without needing to detect on more resources, which helps to reduce the power consumption of the UE detecting WUS and also reduces the detection difficulty for the UE. In addition, this embodiment proposes that the WUS channel can occupy the symbol where the sideline feedback channel is located, which can reduce the resources occupied by the WUS channel and improve the resource utilization.

[0145] exist Figure 4 The illustrated embodiment proposes that the WUS channel can occupy the symbol where the side feedback channel is located, but whether the WUS channel occupies the symbol of the side feedback channel is configured through configuration information. This application embodiment suggests that whether the WUS channel occupies the symbol of the side feedback channel can also be determined through other methods. Next, a second communication method provided by this application embodiment is introduced, in which the WUS channel can also occupy the symbol of the side feedback channel without needing to be configured through configuration information. Please refer to... Figure 7 Here is a flowchart of the method.

[0146] S701, The first UE determines the available resources on the sideline feedback channel.

[0147] For example, the first UE can listen to sideline control information to determine the resources occupied by the sideline feedback information at the time-domain location of the sideline feedback channel. Furthermore, the first UE can determine that some or all of the resources not occupied by the sideline feedback information (or, in other words, the resources remaining besides those occupied by the sideline feedback information) at the time-domain location of the sideline feedback channel are available resources. The sideline feedback information includes, for example, SCI 1 and a second-level SCI (SC2). SCI 1 may carry the time-frequency location of the reserved resources and parameters required for demodulating SCI 2, such as the modulation and coding scheme (MCS). SCI 2 may carry relevant data information, such as the source ID of the sending UE, the target ID of the receiving UE, the transmission type of the data (e.g., multicast, unicast, or broadcast), and whether feedback is required.

[0148] The SCI 2 carries information indicating whether the data requires feedback, such as whether Hybrid Automatic Repeat Request (HARQ) feedback is disabled, HARQ feedback is enabled with unicast transmission, HARQ feedback is enabled with multicast only NACK response, or HARQ feedback is enabled with multicast ACK / NACK response. Based on this information carried by SCI 2, the first UE can determine the number of HARQ sequences and the resource location of the HARQ sequences, that is, determine the resources occupied by the sideline feedback information. For example, if SCI 2 indicates that HARQ feedback is disabled, the first UE can determine that the sideline feedback channel does not transmit sideline feedback information, that is, the sideline feedback information does not occupy resources; if SCI 2 indicates that HARQ feedback is enabled and unicast transmission is performed, the first UE can determine that the sideline feedback channel needs to transmit two HARQ sequences, one of which represents ACK and the other represents NACK, and the first UE can determine the resource locations of these two HARQ sequences; if SCI 2 indicates that HARQ feedback is enabled and multicast only replies with NACK, the first UE can determine that the sideline feedback channel needs to transmit one HARQ sequence, which represents NACK, and can determine the resource location of this HARQ sequence; if SCI 2 indicates that HARQ feedback is enabled and multicast replies with ACK / NACK, the first UE may not be able to determine the resource location of the corresponding HARQ sequence. Therefore, in this case, the resources within the PSFCH frequency domain corresponding to the HARQ feedback can all be regarded as resources occupied by the sideline feedback information. To reduce the impact on the ACK / NACK detection of the original transmission, the first UE can avoid the sequence occupied by the side feedback information and send the WUS sequence on the unoccupied sequence (i.e., available resources). This situation corresponds to the aforementioned formula 11 or formula 13; and / or, the first UE can avoid the PRB occupied by the side feedback information and send the WUS sequence on the unoccupied PRB (i.e., available resources). This situation corresponds to the aforementioned formula 12 or formula 14.

[0149] The number of time slots that the first UE needs to listen to can be related to the configuration period of the sideline feedback channel. For example, if the period of the sideline feedback channel is 4 time slots, then the first UE can listen within 4 time slots, and the listening results can be used to determine which resources on the sideline feedback channel are not occupied in the next one or more periods.

[0150] Alternatively, the first UE can listen in a certain time slot, and the listening results can be used to determine which resources on the side feedback channel within that time slot are not occupied.

[0151] For example, refer to Figure 8 This is an example of determining available resources for the first UE. Figure 8The horizontally lined box represents the resources occupied by SCI 1, and the box with a backslash "\" represents the resources occupied by PSSCH, which carries SCI 2. The 12th and 13th symbols of this time slot are the sideline feedback channel (…). Figure 8 Taking the side-link feedback channel (PSFCH) as an example, the 12th symbol is the AGC symbol. The first UE listens to SCI 1 and SCI 2 to determine the available resources on the symbol where the side-link feedback channel is located.

[0152] For the second UE, the available resources on the sideline feedback channel can be determined in a similar way to the first UE, which will not be elaborated further.

[0153] S702, the first UE transmits a first WUS sequence on available resources. Correspondingly, the second UE detects the first WUS sequence on available resources.

[0154] The first UE can determine the resource identifier of the WUS channel used to carry the first WUS sequence based on the available resources. Based on this resource identifier, it can determine one or more of the time-domain resources, frequency-domain resources, or code-domain resources used to transmit the first WUS sequence, thereby enabling the transmission of the first WUS sequence through the determined resources. For example, the WUS channel used to carry the first WUS sequence can be referred to as the first WUS channel. As one way for the first UE to determine the resource identifier of the first WUS channel based on the available resources, the first UE can determine the channel capacity of the first WUS channel based on the available resources, and then further determine the resource identifier of the first WUS channel based on the channel capacity.

[0155] For example, the first UE can be based on Figure 4 Formula 1 in the illustrated embodiment determines the channel capacity of the first WUS channel. For example, according to Formula 1, the first UE can determine the available resources on the sideline feedback channel based on the frequency domain information, code domain information, and resources occupied by sideline feedback information on the sideline feedback channel. The channel capacity of the first WUS channel may include part or all of the available resources. For example, if the channel capacity of the first WUS channel includes all available resources, then the channel capacity of the first WUS channel can satisfy the following relationship:

[0156] Channel capacity of the first WUS channel = M × H × PL (Formula 15)

[0157] Alternatively, the channel capacity of the first WUS channel can satisfy the following relationship:

[0158] Channel capacity of the first WUS channel = (M × HL′) × P (Formula 16)

[0159] Where M represents the number of sub-channels included in the first WUS channel. H represents the number of PRBs included in a sub-channel. P represents the number of WUS sequences that a PRB can carry. L represents the number of time-frequency code domain resources occupied by the side-feedback information, that is, the total number of sequences occupied by the side-feedback information on a certain RB of a certain symbol. L′ represents the number of time-frequency PRBs occupied by the side-feedback channel, that is, the number of PRBs occupied by the side-feedback information. M, H, and K are all positive integers, P is a positive integer less than or equal to 12, and L and L′ are both greater than or equal to 0. It can be understood that the channel capacity of the first WUS channel determined according to Formula 15 or Formula 16 is the remaining resources after subtracting the resources occupied by the side-feedback information from the resources that can be occupied on the side-feedback channel.

[0160] Optionally, the channel capacity of the first WUS channel can also be determined in S701. For example, the first UE determining the available resources on the sideline feedback channel can also be regarded as determining the channel capacity of the first WUS channel.

[0161] After determining the channel capacity of the first WUS channel, the first UE can determine the resource number of the first WUS channel based on the channel capacity. The relationship satisfied by the resource number of the first WUS channel can be found in [reference needed]. Figure 4 Formula 4 in the illustrated embodiment. In this embodiment, the first identifier is, for example, the identifier of the first WUS sequence. The first identifier is, for example, related to the first UE, or related to the second UE, or related to both the first UE and the second UE, or related to the DRX parameter. This first identifier is related to... Figure 4 The first identifier described in the illustrated embodiment may be the same identifier; relevant content can be found in the references. Figure 4 The embodiment shown in S402 provides a description of the first identifier.

[0162] Optionally, the first UE may transmit the first WUS sequence within a first duration. The time domain range of the first duration can be determined based on the DRX active time.

[0163] For the second UE, the resource label of the first WUS channel can be determined in a similar way to that of the first UE, so as to detect the first WUS sequence on the first WUS channel. I will not go into details.

[0164] In this embodiment, the WUS channel can occupy the symbol where the sideline feedback channel is located, which can reduce the resources occupied by the WUS channel and improve resource utilization. Moreover, the UE can determine the available resources on the sideline feedback channel itself without the need for additional information configuration, thus saving the configuration process.

[0165] exist Figure 4 The illustrated embodiments or Figure 7 In the illustrated embodiment, for the receiving UE (e.g., the second UE), if a WUS sequence (e.g., the first WUS sequence) is received, the second UE can remain awake during the next DRX activation period (or, in other words, can listen to the PSCCH during the next DRX activation period), while if no WUS sequence is received, the second UE can sleep during the next DRX activation period (or, in other words, can not listen to the PSCCH during the next DRX activation period).

[0166] Alternatively, for the second UE, if it receives a WUS sequence indicating wakefulness, the second UE can remain awake during the subsequent DRX active period; if the WUS sequence indicates sleep, the second UE can sleep during the subsequent DRX active period. For example, the first WUS sequence might include two WUS sequences, one indicating wakefulness and the other indicating sleep. Both WUS sequences can be determined, for example, based on a first identifier, but there can be an offset between them. Additionally, in this case, P in the above formula can correspond to P sequence groups, where each sequence group may include two WUS sequences, one indicating wakefulness and the other indicating sleep. For example, if the first UE sends one of the first WUS sequences, the second UE can clearly identify which WUS sequence in the first WUS sequence it has received. If the second UE determines that it has received the WUS sequence indicating wakefulness, the second UE will remain awake during the subsequent DRX active period; if the second UE determines that it has received the WUS sequence indicating sleep, the second UE will sleep during the subsequent DRX active period.

[0167] Additionally, if the second UE determines whether to sleep based on the WUS sequence, there might be situations where the second UE fails to receive the WUS sequence, for example, due to factors such as network quality. In this case, if the second UE does not receive the WUS sequence, it can remain awake to avoid missing data transmitted by the first UE. The second UE's failure to receive the WUS sequence can also be considered as a decision to remain awake based on the WUS sequence.

[0168] Optionally, the second UE, acting as a receiving UE, may correspond to multiple transmitting UEs. That is, besides the first UE, there may be multiple other UEs sending data to the second UE. The first UE and these multiple UEs are all transmitting UEs of the second UE. The second UE may use the DRX mechanism with different transmitting UEs, and the DRX parameters used by the second UE with different transmitting UEs may be the same or different. If the DRX parameters used by the second UE with two transmitting UEs are different, it may result in different DRX activation times for the second UE under these two DRX parameters. Therefore, if the DRX activation times of the second UE under multiple DRX parameters overlap (or in other words, the DRX activation times under multiple DRX parameters coincide), the second UE can determine whether to sleep in the overlapping part based on multiple WUS sequences from multiple transmitting UEs. For example, if the second UE determines to stay awake based on at least one WUS sequence from multiple WUS sequences, the second UE stays awake in the overlapping part; if the second UE determines to sleep based on all WUS sequences from multiple WUS sequences, the second UE sleeps in the overlapping part. For the non-overlapping part, the second UE can determine whether to sleep based on the WUS sequence from the corresponding transmitting UE. For information on how the second UE determines whether to sleep or remain awake based on a WUS sequence, please refer to the above text.

[0169] For example, UE1, UE2, and UE3 all need to send data to UE4, with UE4 acting as the receiving UE and UE1, UE2, and UE3 all acting as the transmitting UEs. UE1 configures DRX activation times for UE4 in time slots 1 to 4, UE2 configures them in time slots 3 to 6, and UE3 configures them in time slots 4 to 7. Time slot 3 corresponds to the intersection of the DRX activation times of UE1 and UE2, time slot 4 corresponds to the intersection of the DRX activation times of UE1, UE2, and UE3, and time slots 5 to 6 correspond to the intersection of the DRX activation times of UE2 and UE3. For time slots 1 to 2, UE3 determines whether to sleep based on the WUS sequence from UE1. For time slot 7, UE3 determines whether to sleep based on the WUS sequence from UE3. For time slot 3, UE4 determines whether to sleep based on a combination of the WUS sequences from UE1 and UE2. For example, if UE4 determines to remain awake based on at least one of the WUS sequences from UE1 and UE2, then UE4 remains awake in time slot 3; if UE4 determines to hibernate based on both the WUS sequences from UE1 and UE2, then UE4 hibernates in time slot 3. For time slot 4, UE4 determines whether to hibernate based on a combination of the WUS sequences from UE1, UE2, and UE3. For example, if UE4 determines to remain awake based on at least one of the WUS sequences from UE1, UE2, and UE3, then UE4 remains awake in time slot 4; if UE4 determines to hibernate based on all three, then UE4 hibernates in time slot 4. For time slots 5 to 6, UE4 determines whether to hibernate based on a combination of the WUS sequences from UE2 and UE3; the determination method can be found above.

[0170] In the foregoing embodiments, the first UE needs to send a WUS sequence to the second UE to achieve the wake-up signal function. Next, this application provides a third communication method in which the first UE does not need to send a WUS sequence to the second UE, but can still achieve the wake-up signal function. Please refer to... Figure 9 Here is a flowchart of the method.

[0171] S901, the first UE sends side-link control information. Correspondingly, the second UE receives side-link control information from the first UE.

[0172] The side-channel control information is, for example, SCI 2, or it could be SCI 1, or both SCI 1 and SCI 2. The side-channel control information may or may not include a first identifier. In this embodiment, the first identifier is, for example, the identifier of the second UE, or the target ID of the second UE. Optionally, if the side-channel control information includes the first identifier, the second UE is instructed to listen to the PSCCH during the next DRX activation time; if the side-channel control information does not include the first identifier, or the first UE does not send side-channel control information, the second UE is instructed not to listen to the PSCCH during the next DRX activation time. The DRX activation time is, for example, DRX on duration or DRX active time.

[0173] Optionally, the first UE may transmit sideline control information within a first duration. The time domain range of the first duration can be determined based on the DRX active time.

[0174] S902. If the side-link control information includes a first identifier, the second UE will listen to the PSCCH during the next DRX activation period (or, in other words, may remain awake during the next DRX activation period). Conversely, if the side-link control information does not include the first identifier, the second UE will not listen to the PSCCH during the next DRX activation period (or, in other words, may sleep during the next DRX activation period). The side-link control information can indicate whether to remain awake by including or not including the first identifier. In this case, if the second UE does not receive the side-link control information, or although the second UE receives the side-link control information but fails to decode it, the second UE may remain awake during the next DRX activation period to prevent missing data from the first UE.

[0175] In other words, the present application embodiment can realize the function of the wake-up signal through the side-line control information. The first UE does not need to send the WUS sequence again, which can save transmission overhead and improve the utilization rate of the side-line control information.

[0176] The above describes a side-line control information system that uses a first identifier to indicate whether the user is awake. Alternatively, in another implementation, the side-line control information can use an indication to indicate whether the user is awake. Optionally, if the side-line control information includes a first identifier, the second UE can clearly identify that the side-line control information is intended for the second UE. Optionally, if the side-line control information also includes an indication, the second UE can determine whether to remain awake during the next DRX activation period based on the indication. If the indication indicates to remain awake, the second UE can remain awake during the next DRX activation period; if the indication indicates to sleep, the second UE can sleep during the next DRX activation period. If the side-line control information does not include a first identifier, the second UE can determine that the side-line control information is not intended for the second UE, and the second UE does not need to determine whether to remain awake or sleep based on the side-line control information. The indication information may occupy one or more bits. For example, if the indication information occupies one bit, a value of "1" indicates to remain awake, and a value of "0" indicates to sleep.

[0177] In this situation, if the second UE does not receive the sideline control information, or if the second UE receives the sideline control information but fails to decode it, the second UE can remain awake during the next DRX activation time to prevent missing data from the first UE.

[0178] Taking SCI 2 as an example, the sidelink control information is carried on the sidelink data channel, which is, for example, a physical sidelink shared channel. If SCI 2 is used to schedule data, the sidelink data channel can also carry the data scheduled by SCI 2. However, in this embodiment, SCI 2 is used to implement the WUS function. For the second UE, it can simply listen to SCI 2 on the sidelink data channel and determine whether to be woken up based on SCI 2, without listening to data on the sidelink data channel. Therefore, optionally, the sidelink data channel may not carry data, that is, SCI 2 is an independent SCI (stand-alone SCI); or, the resources on the sidelink data channel originally used to carry data can be used to carry preset information, such as all "0" information or all "1" information.

[0179] After receiving the sideline data channel, the second UE typically sends feedback information. However, in this embodiment, the sideline data channel carries SCI 2 and may not carry data. Therefore, this embodiment can specify some rules for the feedback from the second UE.

[0180] Optionally, SCI 2 can indicate that no feedback information should be sent, so that the second UE does not need to send feedback information after receiving SCI 2.

[0181] Alternatively, if SCI 2 instructs the sending of feedback information, then the second UE sends an ACK to the first UE if it successfully receives SCI 2, and sends a NACK to the first UE if it fails to receive SCI 2. Alternatively, if SCI 2 instructs the sending of specific feedback information, such as an ACK, then the second UE sends an ACK to the first UE if it successfully receives SCI 2, and does not send feedback information if it fails to receive SCI 2. Alternatively, if the specific feedback information is, for example, a NACK, then the second UE sends a NACK to the first UE if it fails to receive SCI 2, and does not send feedback information if it successfully receives SCI 2.

[0182] Alternatively, the second UE can determine whether to send feedback information or the content of the feedback information based on the decoding status of SCI 2. For example, if the second UE successfully decodes SCI 2, it sends an ACK to the first UE, and if it fails to decode SCI 2, it sends a NACK to the first UE; or, if the second UE successfully decodes SCI 2, it sends an ACK to the first UE, and if it fails to decode SCI 2, it does not send feedback information.

[0183] Alternatively, in addition to the methods mentioned above, the second UE can also determine whether to send feedback information or the content of the feedback information through other means.

[0184] Optionally, the second UE, acting as a receiving UE, may correspond to multiple transmitting UEs. That is, besides the first UE, there may be multiple other UEs sending data to the second UE, and both the first UE and these other UEs are transmitting UEs for the second UE. In the presence of multiple transmitting UEs, if the second UE uses the DRX mechanism with multiple transmitting UEs, the DRX parameters used by the second UE with different transmitting UEs may be the same or different. If the DRX parameters used by the second UE with two different transmitting UEs are different, the DRX activation time of the second UE may differ under these two DRX parameters. Therefore, if the DRX activation times of the second UE under multiple DRX parameters overlap, the second UE can determine whether to sleep in the overlapping portion based on multiple side-channel control information from the multiple transmitting UEs. For example, if the second UE determines to remain awake based on at least one of the side-channel control information, the second UE remains awake in the overlapping portion; if the second UE determines to sleep based on all of the side-channel control information, the second UE sleeps in the overlapping portion. For the non-overlapping portion, the second UE determines whether to sleep based on the side-channel control information from the corresponding transmitting UE. As for how the second UE determines whether to sleep or wake up based on a side-by-side control message, please refer to the description above in this step.

[0185] Furthermore, the second UE acts as the receiving UE, and the first UE acts as the transmitting UE. This pair of UEs may be configured with one or more DRX parameters. If multiple DRX parameters are configured, the DRX activation times configured for different DRX parameters may be the same or different. If the DRX activation times configured for different DRX parameters are different, the first durations corresponding to the different DRX parameters may also be different. These different first durations may or may not overlap (or, they may or may not overlap). If the different first durations overlap, and the second UE receives side-channel control information from the first UE during the overlap portion of the first durations, the second UE may not be able to distinguish which DRX parameter the side-channel control information corresponds to. Therefore, if the second UE determines to remain awake based on the side-channel control information, the second UE remains awake for all DRX activation times configured for all DRX parameters between the second UE and the first UE (wherein, a DRX activation time for a DRX configuration refers to the next DRX activation time after the current time configured for that DRX parameter). If the second UE uses the DRX parameter with other UEs besides the first UE, the method for determining whether the second UE is awake or asleep can continue to refer to the previous paragraph.

[0186] For example, the first UE and the second UE use three DRX parameters: DRX parameter A, DRX parameter B, and DRX parameter C. If there is an overlap in the first duration corresponding to these three DRX parameters, and if the first UE sends side-channel control information to the second UE according to DRX parameter A during the overlap of the first durations, the second UE may not be able to distinguish which DRX parameter the side-channel control information corresponds to between the second UE and the first UE. In this case, if the second UE determines to remain awake based on the side-channel control information, then the second UE remains awake during all three DRX activation times configured for these three DRX parameters (wherein, a DRX activation time for one DRX configuration refers to the next DRX activation time after the current time configured for that DRX parameter).

[0187] It's also possible that the second UE acts as the receiving UE and the first UE acts as the transmitting UE. For example, multiple DRX parameters are configured between these two UEs, with different DRX activation times under different DRX parameters, and the first durations corresponding to different DRX parameters overlap. If the second UE receives sideline control information within a time slot and determines to remain awake based on that sideline control information, and this time slot is, for example, within J first durations configured by J different DRX parameters, or can be understood as the time slot being the overlapping time of J first times, then the second UE can remain awake within the J DRX activation times configured by these J different DRX parameters (where each DRX parameter configures one DRX activation time, and this DRX activation time refers to the next DRX activation time after the current time configured by that DRX parameter), where J is a positive integer.

[0188] For example, the first UE and the second UE use three DRX parameters: DRX parameter A, DRX parameter B, and DRX parameter C. For instance, if the first UE receives sideline control information within a time slot and determines to remain awake based on this information, and this time slot overlaps with first time A and first time B (where first time A corresponds to DRX parameter A and first time B corresponds to DRX parameter B), then the second UE can remain awake during DRX activation time A and DRX activation time B. DRX activation time A is the DRX activation time configured by DRX parameter A (DRX activation time A refers to the next DRX activation time after the current time configured by DRX parameter A), and DRX activation time B is the DRX activation time configured by DRX parameter B (DRX activation time B refers to the next DRX activation time after the current time configured by DRX parameter B).

[0189] The technical solution of this application embodiment enables the UE to realize the WUS function through sideline control information without having to send an additional WUS sequence, which helps to reduce signaling overhead.

[0190] Next, consider another problem. For example, if the first UE is a receiving UE, multiple UEs may send data to it; that is, the first UE may correspond to multiple sending UEs. These multiple sending UEs sending data to the first UE may involve resource reservation. That is, some or all of these UEs may reserve resources and use those reserved resources to send data to the first UE. During the resource reservation process, different UEs may reserve the same resources. For example, multiple UEs, including a second UE and a third UE, may both reserve resources for sending data to the first UE, and these reserved resources may be the same, potentially leading to resource collisions. Therefore, this application provides a fourth communication method, which can reduce the probability of resource collisions. Please refer to... Figure 10 Here is a flowchart of the method.

[0191] S1001, The first UE determines the available resources on the sideline feedback channel.

[0192] For more information about S1001, please refer to [link / reference]. Figure 7 S701 in the illustrated embodiment.

[0193] S1002, The first UE sends an indication message on the available resources.

[0194] Optionally, before S1001, S1003 is included: The first UE determines a resource conflict reserved by at least two UEs. At least two UEs need to send data to the first UE; that is, at least two UEs are transmitting UEs to the first UE. Each of the at least two UEs has reserved resources to send data to the first UE. The first UE can receive reservation messages from the at least two UEs, thus enabling the first UE to determine the resources reserved by the at least two UEs. If the first UE determines a resource conflict, for example, if the resources reserved by the at least two UEs overlap or are the same, then the first UE needs to notify some or all of the at least two UEs to reduce resource collisions and improve the success rate of data reception. Therefore, if the first UE determines a resource conflict reserved by at least two UEs, it can execute S1001 to determine the available resources on the sideline feedback channel, and then send indication information on the available resources. This indication information can be implemented, for example, through a WUS sequence, or it can also be implemented through other information. For example, the first UE determines a first resource on the available resources based on its own identifier or other information, and sends the indication information through the first resource.

[0195] For example, the first UE can send the indication information to some or all of at least two UEs, and these UEs can receive the indication information from the first UE. For these UEs, the available resources on the sideline feedback channel can be determined in a similar manner to the first UE, and detection can be performed on the available resources to receive the indication information that the first UE might send. The number of these UEs can be one or more, and these UEs may include, for example, the second UE. Figure 10 Taking the second UE receiving this indication information from the first UE as an example, the indication information may indicate a resource conflict, or it may indicate the conflicting resource (e.g., indicating one or more of the resource's time domain location, frequency domain location, or code domain location). The UE receiving this indication information can determine that the reserved resource is conflicting, and thus can re-reserve other resources or abandon data transmission, thereby reducing the probability of resource collisions. For the first UE, since the probability of resource collisions occurring when the transmitting UE transmits data is reduced, the data reception success rate can be improved.

[0196] Figure 11 A schematic diagram of the structure of a communication device 1100 provided in an embodiment of this application is given. The communication device 1100 may be... Figure 4 The illustrated embodiments Figure 7 The illustrated embodiments Figure 9 The illustrated embodiments or Figure 10The first UE described in any of the illustrated embodiments is used to implement the method executed by the first UE in the above method embodiments. Alternatively, the communication device 1100 may also be... Figure 4 The illustrated embodiments Figure 7 The illustrated embodiments Figure 9 The illustrated embodiments or Figure 10 The second UE described in any of the embodiments shown is used to implement the method corresponding to the second UE in the above method embodiments. For specific functions, please refer to the description in the above method embodiments.

[0197] The communication device 1100 includes one or more processors 1101. The processor 1101, also referred to as a processing unit, can implement certain control functions. The processor 1101 can be a general-purpose processor or a dedicated processor, etc. For example, it may include: a baseband processor, a central processing unit (CPU), an application processor, a modem processor, a graphics processor, an image signal processor, a digital signal processor, a video codec processor, a controller, a memory, and / or a neural network processor, etc. The baseband processor can be used to process communication protocols and communication data. The CPU can be used to control the communication device 1100, execute software programs, and / or process data. Different processors can be independent devices or integrated into one or more processors, for example, integrated on one or more application-specific integrated circuits (ASICs).

[0198] Optionally, the communication device 1100 includes one or more memories 1102 for storing instructions 1104, which can be executed on the processor to cause the communication device 1100 to perform the methods described in the above method embodiments. Optionally, the memories 1102 may also store data. The processor and memories can be provided separately or integrated together.

[0199] Optionally, the communication device 1100 may store instructions 1103 (sometimes referred to as code or program), which can be executed on the processor to cause the communication device 1100 to perform the methods described in the above embodiments. Data may be stored in the processor 1101.

[0200] Optionally, the communication device 1100 may also include a transceiver 1105 and an antenna 1106. The transceiver 1105 may be referred to as a transceiver unit, transceiver, transceiver circuit, transceiver, input / output interface, etc., and is used to realize the transmission and reception functions of the communication device 1100 through the antenna 1106.

[0201] Optionally, the communication device 1100 may further include one or more of the following components: a wireless communication module, an audio module, an external memory interface, internal memory, a universal serial bus (USB) interface, a power management module, an antenna, a speaker, a microphone, an input / output module, a sensor module, a motor, a camera, or a display screen, etc. It is understood that in some embodiments, the communication device 1100 may include more or fewer components, or some components may be integrated, or some components may be separated. These components may be implemented in hardware, software, or a combination of software and hardware.

[0202] The processor 1101 and transceiver 1105 described in this application embodiment can be implemented on integrated circuits (ICs), analog ICs, radio frequency identification (RFID) integrated circuits, mixed-signal ICs, application-specific integrated circuits (ASICs), printed circuit boards (PCBs), or electronic devices. The communication device described herein can be a standalone device (e.g., a standalone integrated circuit, a mobile phone, etc.) or a part of a larger device (e.g., a module embedded in other devices). For details, please refer to the foregoing descriptions of terminal devices and network devices; further details will not be repeated here.

[0203] This application provides a terminal device (referred to as UE for convenience) that can be used in the foregoing embodiments. The terminal device includes components for implementing... Figure 4 The illustrated embodiments Figure 7 The illustrated embodiments Figure 9 The illustrated embodiments or Figure 10 The corresponding means, units, and / or circuits of the first UE function described in any of the embodiments shown; or, the terminal device includes means for implementing Figure 4 The illustrated embodiments Figure 7 The illustrated embodiments Figure 9 The illustrated embodiments or Figure 10 The corresponding means, units, and / or circuits of the second UE function described in any of the embodiments shown. For example, a terminal device includes a transceiver module for supporting the terminal device in implementing transceiver functions, and a processing module for supporting the terminal device in processing signals.

[0204] Figure 12 A schematic diagram of the structure of a terminal device provided in an embodiment of this application is given.

[0205] The terminal device 1200 is applicable to Figure 2 In the architecture shown. For ease of explanation, Figure 12 Only the main components of the terminal device 1200 are shown. (Example) Figure 12 As shown, the terminal device 1200 includes a processor, memory, control circuitry, antenna, and input / output devices. The processor is primarily used to process communication protocols and data, control the entire terminal device 1200, execute software programs, and process the data from those programs. The memory is mainly used to store software programs and data. The control circuitry is primarily used for converting baseband signals to radio frequency signals and processing radio frequency signals. The antenna is primarily used for transmitting and receiving radio frequency signals in the form of electromagnetic waves. Input / output devices, such as a touchscreen, display screen, microphone, and keyboard, are primarily used to receive user input data and output data to the user.

[0206] Taking a mobile phone as an example, when the terminal device 1200 is powered on, the processor can read the software program in the storage unit, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be transmitted wirelessly, the processor performs baseband processing on the data to be transmitted and outputs the baseband signal to the control circuit. The control circuit performs radio frequency processing on the baseband signal and transmits the radio frequency signal outward in the form of electromagnetic waves through the antenna. When data is sent to the terminal device 1200, the control circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor. The processor converts the baseband signal into data and processes the data.

[0207] Those skilled in the art will understand that, for ease of explanation, Figure 12 Only one memory and processor are shown. In some embodiments, the terminal device 1200 may include multiple processors and memories. Memory may also be referred to as storage medium or storage device, etc., and the embodiments of the present invention do not limit this.

[0208] As an optional implementation, the processor may include a baseband processor and a central processing unit. The baseband processor is mainly used to process communication protocols and communication data, while the central processing unit is mainly used to control the entire terminal device 1200, execute software programs, and process the data of the software programs. Figure 12The processor in the terminal device 1200 integrates the functions of a baseband processor and a central processing unit (CPU). Those skilled in the art will understand that the baseband processor and CPU can also be independent processors interconnected via technologies such as buses. The terminal device 1200 may include multiple baseband processors to adapt to different network standards, and multiple CPUs to enhance its processing capabilities. The various components of the terminal device 1200 can be connected via various buses. The baseband processor can also be described as a baseband processing circuit or a baseband processing chip. The CPU can also be described as a central processing circuit or a central processing chip. The function of processing communication protocols and communication data can be built into the processor or stored in the storage unit as a software program, with the processor executing the software program to implement the baseband processing function.

[0209] In one example, the antenna and control circuit with transceiver functions can be considered as the transceiver unit 1210 of the terminal device 1200, and the processor with processing functions can be considered as the processing unit 1220 of the terminal device 1200. For example... Figure 12 As shown, the terminal device 1200 includes a transceiver unit 1210 and a processing unit 1220. The transceiver unit can also be referred to as a transceiver, transceiver device, or transceiver apparatus. Optionally, the device in the transceiver unit 1210 used to implement the receiving function can be considered as a receiving unit, and the device in the transceiver unit 1210 used to implement the transmitting function can be considered as a transmitting unit; that is, the transceiver unit 1210 includes both a receiving unit and a transmitting unit. For example, the receiving unit can also be referred to as a receiver, receiver circuit, or receiving device, and the transmitting unit can be referred to as a transmitter, transmitter, or transmitting circuit.

[0210] Those skilled in the art will recognize that the units and steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0211] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division. Units described as separate components may or may not be physically separated, and components shown as units may or may not be physical units, i.e., they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0212] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned computer-readable storage medium can be any available medium that a computer can access. For example, but not limited to: computer-readable media may include random access memory (RAM), read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM), universal serial bus flash disk, portable hard disk, or other optical disc storage, disk storage media, or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer. Additionally, by way of example but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), or direct rambus RAM (DR RAM).

[0213] Example 1. A communication method applied to a first terminal device, the method comprising:

[0214] Obtain configuration information, which is used to configure a first resource, and the first resource is used to send a wake-up signal WUS sequence;

[0215] The first WUS sequence is transmitted in the second resource, which is included in the first resource.

[0216] Example 2. According to the method described in Example 1, the configuration information includes the time domain information, frequency domain information, and first period of the first resource, wherein the first period is the period in which the resource used to send the WUS sequence appears in the time domain.

[0217] Example 3. According to the method described in Example 1 or 2, the channel capacity of the first WUS channel satisfies the following relationship:

[0218] The channel capacity of the first WUS channel = M × H × K × P;

[0219] Wherein, the first WUS channel is used to carry the first WUS sequence, M represents the number of sub-channels included in the first WUS channel, H represents the number of physical resource blocks (PRBs) included in a sub-channel, K represents the number of orthogonal frequency division multiplexing (OFDM) symbols occupied by the first WUS channel, and P represents the number of WUS sequences that a PRB can carry. Wherein, M, H, and K are all positive integers, and P is a positive integer less than or equal to 12.

[0220] Example 4. According to the method described in Example 1 or 2, the configuration information further includes a second period, which is greater than the first period, and one second period includes one or more first periods. The second period is the period during which the first terminal device sends the WUS sequence.

[0221] Example 5. According to the method described in Example 4, the channel capacity of the first WUS channel satisfies the following relationship:

[0222] The channel capacity of the first WUS channel = M × H × K × P × N;

[0223] Wherein, the first WUS channel is used to carry the first WUS sequence, M represents the number of sub-channels included in the first WUS channel, H represents the number of physical resource blocks (PRBs) included in a sub-channel, K represents the number of orthogonal frequency division multiplexing (OFDM) symbols occupied by the first WUS channel, P represents the number of WUS sequences that a PRB can carry, and N represents the number of the first periods included in a second period, wherein M, H, K, and N are all positive integers, and P is a positive integer less than or equal to 12.

[0224] Example 6. The method according to any one of Examples 1 to 5, the method further comprising:

[0225] Send a first message, which is used to reserve resources for sending WUS sequences. The reserved resources are determined according to the configuration information. The reserved resources are either the resources where the WUS channel is located or the resources on the WUS channel used to carry WUS sequences.

[0226] Example 7. The method described in Example 6,

[0227] The first WUS channel occupies time-domain resources following the time-domain resources where the first message is located; or,

[0228] The first WUS channel occupies the time domain resources where the first message is located;

[0229] The first WUS channel is used to carry the first WUS sequence.

[0230] Example 8. According to the method described in Example 7, the first WUS channel occupies the time domain resources where the first message is located, including:

[0231] The first message occupies the second OFDM symbol of the first WUS channel.

[0232] Example 9. According to any one of Examples 1 to 8, the first resource does not overlap with the resource pool used for random resource selection, or the first resource does not overlap with the first resource pool, wherein the terminal device does not listen to PSCCH when selecting resources in the first resource pool.

[0233] Example 10. The method according to any one of Examples 1 to 9, the method further comprising:

[0234] Obtain a first identifier, which is the identifier of the first WUS sequence.

[0235] Example 11. Obtaining a first identifier according to the method described in Example 10 includes:

[0236] Receive the first identifier from the network device; or,

[0237] The first identifier is obtained based on first information related to the identifier of the second terminal device, wherein the second terminal device is the receiving end of the first WUS sequence; or,

[0238] Receive first parameter information from the network device, and determine the first identifier based on the first parameter information and the identifier of the first terminal device; or,

[0239] The first identifier is obtained based on the DRX parameter.

[0240] Example 12. According to the method described in Example 10 or 11, the resource label of the first WUS channel satisfies the following relationship:

[0241] The resource label of the first WUS channel = the first identifier mod (the channel capacity of the first WUS channel);

[0242] The resource label of the first WUS channel is used to determine the time domain, frequency domain, or code domain resources for sending or receiving the first WUS sequence, and mod represents the modulo operation.

[0243] Example 13. According to any one of Examples 1 to 12, the second resource occupies the last OFDM symbol in a time slot.

[0244] Example 14. According to the method described in Example 13, the second resource also occupies the 12th OFDM symbol in the time slot, or the second resource also occupies the 1st OFDM symbol where the sideline feedback channel is located in the time slot.

[0245] Example 15. According to any one of Examples 1 to 14, the second resource is located in the time domain within a first duration preceding the start time domain position of a DRX activation time.

[0246] Example 16. According to the method described in Example 15, the first duration is determined based on the DRX parameter, configured through the configuration information, or pre-configured.

[0247] Example 17. Obtaining configuration information according to any one of Examples 1 to 16, including:

[0248] Receive the configuration information from the network device; or,

[0249] Receive the configuration information from the second terminal device; or,

[0250] The configuration information is determined based on the DRX parameters; or,

[0251] Determine the predefined or preconfigured configuration information.

[0252] Example 18. The method according to any one of Examples 1 to 17,

[0253] The first terminal device does not require receiving side line feedback information in the 12th or 13th OFDM symbol of the first time slot; or,

[0254] The first terminal device receives feedback information at a lower priority than transmitting the WUS sequence in the 12th or 13th OFDM symbol of the first time slot.

[0255] Wherein, the first time slot is the time slot for sending or receiving the first WUS sequence, and the first terminal device is the sending end of the first WUS sequence.

[0256] Example 19. A communication method, comprising:

[0257] Determine the available resources on the sideline feedback channel;

[0258] Send or receive the first WUS sequence on the available resources.

[0259] Example 20. Determining the available resources on the sideline feedback channel according to the method described in Example 19, including:

[0260] Listen for side-channel control information;

[0261] The resources occupied by the side-link feedback information at the time domain location of the side-link feedback channel are determined based on the side-link control information.

[0262] At the time-domain location where the side feedback channel is located, some or all of the remaining resources, excluding those occupied by the side feedback information, are considered available resources.

[0263] Example 21. According to the method described in Example 19 or 20, the channel capacity of the first WUS channel satisfies the following relationship:

[0264] The channel capacity of the first WUS channel = M × H × PL;

[0265] Wherein, the first WUS channel is used to carry the first WUS sequence, M represents the number of sub-channels included in the first WUS channel, H represents the number of PRBs included in a sub-channel, P represents the number of WUS sequences that a PRB can carry, and L represents the number of resources occupied by the side feedback information. Here, M and H are both positive integers, P is a positive integer less than or equal to 12, and L is an integer greater than or equal to 0.

[0266] Example 22. According to the method described in any one of Examples 19 to 21, the resource label of the first WUS channel satisfies the following relationship:

[0267] The resource label of the first WUS channel = the first identifier mod (the channel capacity of the first WUS channel);

[0268] The resource identifier of the first WUS channel is used to determine the time domain, frequency domain, or code domain resources for transmitting or receiving the first WUS sequence. The first identifier is related to the first terminal device, or to the second terminal device, or to the DRX parameter. The first terminal device is the transmitter of the first WUS sequence, and the second terminal device is the receiver of the first WUS sequence. mod represents modulo operation.

[0269] Example 23. A communication method applied to a first terminal device, the method comprising:

[0270] Sending sideline control information, the sideline control information may or may not include a first identifier, the first identifier being associated with a second terminal device, wherein the sideline control information including the first identifier is used to instruct the second terminal device to listen to the sideline control channel during the next DRX activation time.

[0271] Example 24. According to the method described in Example 23, the side-link control information does not include the first identifier used to indicate that the second terminal device does not listen to the side-link control channel during the next DRX activation time.

[0272] Example 25. According to the method described in Example 23 or 24, the sideline control information is carried on the sideline data channel, wherein the sideline data channel does not carry data, or the resources on the sideline data channel used to carry data carry preset information.

[0273] Example 26. A communication method applied to a second terminal device, the method comprising:

[0274] Receive side-link control information;

[0275] If the side-link control information includes a first identifier, the side-link control channel is monitored during the next DRX activation time, wherein the first identifier is associated with the second terminal device.

[0276] Example 27. The method according to Example 26, the method further includes:

[0277] If the side-link control information does not include the first identifier, the side-link control channel will not be monitored during the next DRX activation time.

[0278] Example 28. According to the method described in Example 26 or 27, the sideline control information is carried on the sideline data channel, wherein the sideline data channel does not carry data, or the resources on the sideline data channel used to carry data carry preset information.

[0279] Example 29. A communication device, comprising a transceiver unit and a processing unit, wherein,

[0280] The processing unit is used to obtain configuration information, the configuration information is used to configure a first resource, and the first resource is used to send a WUS sequence;

[0281] The transceiver unit is configured to transmit a first WUS sequence in a second resource, the second resource being included in the first resource.

[0282] Example 30. According to the communication device of Example 29, the configuration information includes time-domain information, frequency-domain information, and a first period of the first resource, wherein the first period is the period in which the resource used to transmit the WUS sequence appears in the time domain.

[0283] Example 31. According to the communication device described in Example 29 or 30, the channel capacity of the first WUS channel satisfies the following relationship:

[0284] The channel capacity of the first WUS channel = M × H × K × P;

[0285] Wherein, the first WUS channel is used to carry the first WUS sequence, M represents the number of sub-channels included in the first WUS channel, H represents the number of physical resource blocks (PRBs) included in a sub-channel, K represents the number of orthogonal frequency division multiplexing (OFDM) symbols occupied by the first WUS channel, and P represents the number of WUS sequences that a PRB can carry. Wherein, M, H, and K are all positive integers, and P is a positive integer less than or equal to 12.

[0286] Example 32. According to the communication device described in Example 29 or 30, the configuration information further includes a second period, the second period being greater than the first period, and one second period including one or more first periods, the second period being the period during which the communication device sends WUS sequences.

[0287] Example 33. According to the communication device described in Example 32, the channel capacity of the first WUS channel satisfies the following relationship:

[0288] The channel capacity of the first WUS channel = M × H × K × P × N;

[0289] Wherein, the first WUS channel is used to carry the first WUS sequence, M represents the number of sub-channels included in the first WUS channel, H represents the number of physical resource blocks (PRBs) included in a sub-channel, K represents the number of orthogonal frequency division multiplexing (OFDM) symbols occupied by the first WUS channel, P represents the number of WUS sequences that a PRB can carry, and N represents the number of the first periods included in a second period, wherein M, H, K, and N are all positive integers, and P is a positive integer less than or equal to 12.

[0290] Example 34. In the communication apparatus according to any one of Examples 29 to 33, the transceiver unit is further configured to send a first message, the first message being used to reserve resources for sending WUS sequences, the reserved resources being determined according to the configuration information, wherein the reserved resources are resources where the WUS channel is located, or resources on the WUS channel used to carry WUS sequences.

[0291] Example 35. The communication device according to Example 34,

[0292] The first WUS channel occupies time-domain resources following the time-domain resources where the first message is located; or,

[0293] The first WUS channel occupies the time domain resources where the first message is located;

[0294] The first WUS channel is used to carry the first WUS sequence.

[0295] Example 36. According to the communication device described in Example 35, the first WUS channel occupies the time domain resources where the first message is located, including:

[0296] The first message occupies the second OFDM symbol of the first WUS channel.

[0297] Example 37. The communication device according to any one of Examples 29 to 36, wherein the first resource does not overlap with the resource pool for random resource selection, or the first resource does not overlap with the first resource pool, wherein the terminal device does not listen to the PSCCH when selecting resources in the first resource pool.

[0298] Example 38. In the communication device according to any one of Examples 29 to 37, the processing unit is further configured to obtain a first identifier, wherein the first identifier is an identifier of the first WUS sequence.

[0299] Example 39. In the communication device according to Example 38, the processing unit is configured to obtain the first identifier in the following manner:

[0300] The first identifier is received from the network device via the transceiver unit; or...

[0301] The first identifier is obtained based on first information related to the identifier of the second terminal device, wherein the second terminal device is the receiving end of the first WUS sequence; or,

[0302] The transceiver unit receives first parameter information from the network device, and determines the first identifier based on the first parameter information and the identifier of the first terminal device; or...

[0303] The first identifier is obtained based on the DRX parameter.

[0304] Example 40. According to the communication device described in Example 38 or 39, the resource identifier of the first WUS channel satisfies the following relationship:

[0305] The resource label of the first WUS channel = the first identifier mod (the channel capacity of the first WUS channel);

[0306] The resource label of the first WUS channel is used to determine the time domain, frequency domain, or code domain resources for sending or receiving the first WUS sequence, and mod represents the modulo operation.

[0307] Example 41. The communication apparatus according to any one of Examples 29 to 40, wherein the second resource occupies the last OFDM symbol in a time slot.

[0308] Example 42. According to the communication device of Example 41, the second resource also occupies the 12th OFDM symbol in the time slot, or the second resource also occupies the 1st OFDM symbol where the side feedback channel is located in the time slot.

[0309] Example 43. According to any one of Examples 29 to 42, the second resource is located in the time domain within a first duration preceding the start time domain position of a DRX activation time.

[0310] Example 44. In the communication device according to Example 43, the first duration is determined based on the DRX parameter, configured through the configuration information, or pre-configured.

[0311] Example 45. According to any one of Examples 29 to 44, the processing unit is configured to obtain configuration information in the following manner:

[0312] The configuration information is received from the network device via the transceiver unit; or...

[0313] The configuration information is received from the second terminal device via the transceiver unit; or...

[0314] The configuration information is determined based on the DRX parameters; or,

[0315] Determine the predefined or preconfigured configuration information.

[0316] Example 46. The communication device according to any one of Examples 29 to 45,

[0317] The communication device does not require receiving side line feedback information in the 12th or 13th OFDM symbol of the first time slot; or,

[0318] The priority of receiving feedback information in the 12th or 13th OFDM symbol of the first time slot is lower than the priority of transmitting the WUS sequence;

[0319] Wherein, the first time slot is the time slot for sending or receiving the first WUS sequence, and the communication device is the sending end of the first WUS sequence.

[0320] Example 47. A communication device, comprising a processing unit and a transceiver unit, wherein,

[0321] Determine the available resources on the sideline feedback channel;

[0322] Send or receive the first WUS sequence on the available resources.

[0323] Example 48. According to the communication apparatus of Example 47, the processing unit is configured to determine the available resources on the sideline feedback channel in the following manner:

[0324] The transceiver unit monitors side-line control information.

[0325] The resources occupied by the side-link feedback information at the time domain location of the side-link feedback channel are determined based on the side-link control information.

[0326] At the time-domain location where the side feedback channel is located, some or all of the remaining resources, excluding those occupied by the side feedback information, are considered available resources.

[0327] Example 49. According to the communication device described in Example 47 or 48, the channel capacity of the first WUS channel satisfies the following relationship:

[0328] The channel capacity of the first WUS channel = M × H × PL;

[0329] Wherein, the first WUS channel is used to carry the first WUS sequence, M represents the number of sub-channels included in the first WUS channel, H represents the number of PRBs included in a sub-channel, P represents the number of WUS sequences that a PRB can carry, and L represents the number of resources occupied by the side feedback information. Here, M and H are both positive integers, P is a positive integer less than or equal to 12, and L is an integer greater than or equal to 0.

[0330] Example 50. According to any one of Examples 47 to 49, the resource identifier of the first WUS channel satisfies the following relationship:

[0331] The resource label of the first WUS channel = the first identifier mod (the channel capacity of the first WUS channel);

[0332] The resource identifier of the first WUS channel is used to determine the time domain, frequency domain, or code domain resources for transmitting or receiving the first WUS sequence. The first identifier is related to the first terminal device, or to the second terminal device, or to the DRX parameter. The first terminal device is the transmitter of the first WUS sequence, and the second terminal device is the receiver of the first WUS sequence. mod represents modulo operation.

[0333] Example 51. A communication device, comprising a transceiver unit, wherein,

[0334] The transceiver unit is used to send side-link control information, which may or may not include a first identifier. The first identifier is associated with the second terminal device. The side-link control information including the first identifier is used to instruct the second terminal device to listen to the side-link control channel during the next DRX activation time.

[0335] Example 52. According to the communication device of Example 51, the side-link control information does not include the first identifier used to indicate that the second terminal device does not listen to the side-link control channel during the next DRX activation time.

[0336] Example 53. In the communication device according to Example 51 or 52, the side-link control information is carried on the side-link data channel, wherein the side-link data channel does not carry data, or the resources on the side-link data channel used to carry data carry preset information.

[0337] Example 54. A communication device, comprising a processing unit and a transceiver unit, wherein,

[0338] The transceiver unit is used to receive side-line control information;

[0339] The processing unit is configured to instruct the transceiver unit to listen to the sideline control channel during the next DRX activation time if the sideline control information includes a first identifier, wherein the first identifier is associated with the second terminal device.

[0340] Example 55. According to the communication apparatus of Example 54, the processing unit is further configured to instruct the transceiver unit not to listen to the sideline control channel during the next DRX activation time if the sideline control information does not include a first identifier.

[0341] Example 56. In the communication device according to Example 54 or 55, the side-link control information is carried on the side-link data channel, wherein the side-link data channel does not carry data, or the resources on the side-link data channel used to carry data carry preset information.

[0342] Example 57. An apparatus comprising units for performing the methods described in any embodiment of this application.

[0343] Example 58. A computer program product comprising a computer program that, when run on a computer, causes the computer to perform the method as described in any one of Examples 1 to 18, or causes the computer to perform the method as described in any one of Examples 19 to 22, or causes the computer to perform the method as described in any one of Examples 23 to 25, or causes the computer to perform the method as described in any one of Examples 26 to 28.

Claims

1. A communication method, characterized in that, Applied to a first terminal device, the method includes: Obtain configuration information, the configuration information is used to configure a first resource, the first resource is used to send a wake-up signal WUS sequence, wherein the first resource does not overlap with the resource pool used for random resource selection, or the first resource does not overlap with the first resource pool, wherein the terminal device does not listen to PSCCH when selecting resources in the first resource pool; The first WUS sequence is transmitted in the second resource, which is included in the first resource. The second resource occupies the OFDM symbol where the sideline feedback channel is located in one time slot. The first terminal device does not have a requirement to receive sideline feedback information in the 12th or 13th OFDM symbol in the one time slot, or the priority of the first terminal device to receive feedback information in the 12th or 13th OFDM symbol in the one time slot is lower than the priority of transmitting the WUS sequence.

2. The method according to claim 1, characterized in that, The configuration information includes the time domain information, frequency domain information, and first period of the first resource, wherein the first period is the period in which the resource used to send the WUS sequence appears in the time domain.

3. The method according to claim 1 or 2, characterized in that, The channel capacity of the first WUS channel satisfies the following relationship: The channel capacity of the first WUS channel = M × H × K × P; Wherein, the first WUS channel is used to carry the first WUS sequence, M represents the number of sub-channels included in the first WUS channel, H represents the number of physical resource blocks (PRBs) included in a sub-channel, K represents the number of orthogonal frequency division multiplexing (OFDM) symbols occupied by the first WUS channel, and P represents the number of WUS sequences that a PRB can carry. Wherein, M, H, and K are all positive integers, and P is a positive integer less than or equal to 12.

4. The method according to claim 1 or 2, characterized in that, The configuration information also includes a second period, which is greater than the first period, and one second period includes one or more first periods. The second period is the period during which the first terminal device sends the WUS sequence, and the first period is the period during which the resources used to send the WUS sequence appear in the time domain.

5. The method according to claim 4, characterized in that, The channel capacity of the first WUS channel satisfies the following relationship: The channel capacity of the first WUS channel = M × H × K × P × N; Wherein, the first WUS channel is used to carry the first WUS sequence, M represents the number of sub-channels included in the first WUS channel, H represents the number of physical resource blocks (PRBs) included in a sub-channel, K represents the number of orthogonal frequency division multiplexing (OFDM) symbols occupied by the first WUS channel, P represents the number of WUS sequences that a PRB can carry, and N represents the number of the first periods included in a second period, wherein M, H, K, and N are all positive integers, and P is a positive integer less than or equal to 12.

6. The method according to any one of claims 1, 2, and 5, characterized in that, The method further includes: Send a first message, which is used to reserve resources for sending WUS sequences. The reserved resources are determined according to the configuration information. The reserved resources are either the resources where the WUS channel is located or the resources on the WUS channel used to carry WUS sequences.

7. The method according to claim 6, characterized in that, The first WUS channel occupies time-domain resources following the time-domain resources where the first message is located; or, The first WUS channel occupies the time domain resources where the first message is located; The first WUS channel is used to carry the first WUS sequence.

8. The method according to claim 7, characterized in that, The first WUS channel occupies the time-domain resources where the first message is located, including: The first message occupies the second OFDM symbol of the first WUS channel.

9. The method according to any one of claims 1, 2, 5, 7, and 8, characterized in that, The method further includes: Obtain a first identifier, which is the identifier of the first WUS sequence.

10. The method according to claim 9, characterized in that, Obtaining the first identifier includes: Receive the first identifier from the network device; or, The first identifier is obtained based on first information related to the identifier of the second terminal device, wherein the second terminal device is the receiving end of the first WUS sequence; or, Receive first parameter information from the network device, and determine the first identifier based on the first parameter information and the identifier of the first terminal device; or, The first identifier is obtained based on the DRX parameter.

11. The method according to claim 9, characterized in that, The resource labels of the first WUS channel satisfy the following relationship: The resource label of the first WUS channel = the first identifier mod (the channel capacity of the first WUS channel). The resource label of the first WUS channel is used to determine the time domain, frequency domain, or code domain resources for sending or receiving the first WUS sequence, and mod represents the modulo operation.

12. The method according to any one of claims 1, 2, 5, 7, 8, 10, and 11, characterized in that, The second resource occupies the last OFDM symbol within a time slot.

13. The method according to claim 12, characterized in that, The second resource also occupies the 12th OFDM symbol in the same time slot, or the second resource also occupies the 1st OFDM symbol where the side feedback channel is located in the same time slot.

14. The method according to any one of claims 1, 2, 5, 7, 8, 10, 11, and 13, characterized in that, The second resource is located in the time domain within a first duration preceding the start time domain position of a DRX activation time.

15. The method according to claim 14, characterized in that, The first duration is determined based on the DRX parameters, configured through the configuration information, or pre-configured.

16. The method according to any one of claims 1, 2, 5, 7, 8, 10, 11, 13, and 15, characterized in that, Obtain configuration information, including: Receive the configuration information from the network device; or, Receive the configuration information from the second terminal device; or, The configuration information is determined based on the DRX parameters; or, Determine the predefined or preconfigured configuration information.

17. A communication device, characterized in that, include: One or more processors; One or more memory units; And one or more computer programs, wherein the one or more computer programs are stored in the one or more memories, the one or more computer programs including instructions that, when executed by one or more processors of the communication device, cause the communication device to perform the method as described in any one of claims 1 to 16.

18. A computer-readable storage medium, characterized in that, The computer-readable storage medium is used to store a computer program that, when run on a computer, causes the computer to perform the method as described in any one of claims 1 to 16.

19. A chip, characterized in that, It includes one or more processors and a communication interface, wherein the one or more processors are used to read instructions to perform the method as described in any one of claims 1 to 16.

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