Communication method and communication device

Abstract

The present application provides a communication method and a communication device. The method provided in this embodiment can be applied to communication systems, such as 4G, 5G, V2X, LTE‑V, V2V, Internet of Vehicles, MTC, IoT, LTE‑M, M2M, Internet of Things, side communication, etc. The method includes: the first terminal device determines that the first feedback information from the second terminal device is not received after sending the first information, and the first terminal device resends the first information to the second terminal device. The second terminal device receives the first information from the first terminal device, and determines the time domain resource state of the first resource in the DRX sleep state according to the reception status of the first information or the priority of the first feedback information. Through the communication method and device provided by the present application, the first information can be resent to the second terminal device during the DRX activation state as much as possible, reducing the DRX time misalignment caused by discontinuous transmission DTX.

Description

Technical Field

[0001] The present application relates to the field of communications, and further to a communication method and device. Background Art

[0002] In the air interface transmission from network equipment to terminal equipment (UTRAN-to-UE, Uu), the two parties of wireless communication include network equipment and terminal equipment. In Uu air interface transmission, there is a discontinuous reception (DRX) mechanism, the purpose of which is to make the terminal equipment enter a dormant state, that is, a non-receiving state, when there is no data or the data demand is small, so as to reduce the power consumption caused by demodulating the downlink signal. In the DRX mechanism, the network equipment configures DRX parameters for the terminal equipment, and the terminal equipment determines its DRX active state period and DRX dormant state period according to the parameters. The network equipment will send downlink data or downlink control signals when the terminal equipment is in the DRX active state period, and will not send them when the terminal equipment is in the DRX dormant state.

[0003] When the DRX mechanism is introduced into the sidelink (SL) air interface transmission, since there is no core control node such as a network device and there is no mechanism to uniformly configure the DRX parameters of all terminal devices, it is necessary to re-determine new rules based on the distributed system of SL air interface transmission. Summary of the invention

[0004] The present application provides a communication method and a communication device, which can reduce the discontinuous reception time misalignment caused by DTX and reduce the DTX situation when DTX occurs.

[0005] In a first aspect, a communication method is provided, including: a first terminal device determines that first feedback information is not received from a second terminal device after sending first information, the first information is sent within a first DRX activation state period of the second terminal device, and the first feedback information is used to indicate the reception status of the first information by the second terminal device; the first terminal device resends the first information to the second terminal device.

[0006] The first information includes first control information, the first control information is used to reserve a first resource, and a time domain resource of the first resource is located in a DRX dormant state period after a first DRX active state period.

[0007] According to the communication method provided in the present application, the first terminal device resends the first information to the second terminal device after determining that DTX has occurred. This allows the first information to be resent to the second terminal device during the DRX activation period as much as possible, thereby minimizing the DRX time misalignment caused by DTX.

[0008] In combination with the first aspect, in certain implementations of the first aspect, the first terminal device obtains the DRX parameters of the second terminal device; the first terminal device determines the DRX active state period and the DRX sleep state period of the second terminal device based on the DRX parameters; the DRX active state period includes a first DRX active state period, and the first terminal device sends the first information to the second terminal device within the first DRX active state period.

[0009] In combination with the first aspect, in certain implementations of the first aspect, the first terminal device determines that the first retransmission resource is greater than or equal to the resource required to transmit the first information, and the time domain resource of the first retransmission resource starts at the time when the first feedback information should be received and ends at the end time of the first DRX activation state period; the first terminal device resends the first information to the second terminal device on the first retransmission resource.

[0010] In combination with the first aspect, in certain implementations of the first aspect, the first terminal device determines that the first feedback information is not received at the end of the first DRX activation state period; the first terminal device determines that the second retransmission resource is greater than or equal to the resource required to transmit the first information, and the time domain resource of the second retransmission resource is the DRX activation state period after the first DRX activation state period and within the data packet delay margin range, and the first terminal device resends the first information to the second terminal device on the second retransmission resource.

[0011] In combination with the first aspect, in certain implementations of the first aspect, the first terminal device determines that the first feedback information is not received at the end of the first DRX activation state period; the first terminal device determines that the second retransmission resource is less than the resource required to transmit the first information, and the time domain resource of the second retransmission resource is the DRX activation state period after the first DRX activation state period and within the data packet delay margin; the first terminal device resends the first information to the second terminal device on the first resource.

[0012] Among them, the first terminal device determines that the first feedback information is not received at the end of the first DRX activation state period, specifically including: the first retransmission resource is less than the resource required to transmit the first information, or the first terminal device determines that the first feedback information is not received after resending the first information to the second terminal device on the first retransmission resource.

[0013] According to a second aspect, a communication method is provided, including: a second terminal device receives first information from a first terminal device during a first discontinuous reception (DRX) activation state period, the first information including first control information, the first control information being used to reserve a first resource, the time domain resource of the first resource being located in a DRX sleep state period after the first DRX activation state period; the second terminal device determines the time domain resource state of the first resource based on a reception status of the first information and / or a priority of the first feedback information, the first feedback information being used to indicate a reception status of the first information by the second terminal device.

[0014] According to the communication method provided in the present application, when a feedback channel is configured between the second terminal device and the first terminal device or a feedback channel is configured between the second terminal device and the first terminal device and the feedback channel is enabled, the second terminal device determines the time domain resource state of the first resource based on the reception status of the first information and / or the priority of the first feedback information, and can take measures to re-receive the first information when DTX occurs or avoid resource waste when the reception is successful.

[0015] In combination with the second aspect, in some implementations of the second aspect, the second terminal device determines the time domain resource state of the first resource according to the reception status of the first information or the priority of the first feedback information.

[0016] Optionally, the second terminal device determines that the first feedback information is not sent, and converts the time domain resource of the first resource to an activated state.

[0017] Optionally, the second terminal device determines that the first information is received successfully and remains in a dormant state in the time domain resources of the first resource.

[0018] Optionally, the second terminal device determines that reception of the first information fails at the end of the first DRX activation state period, and converts the time domain resources of the first resource to an activation state.

[0019] Optionally, the second terminal device determines that the first information is received successfully and converts the time domain resource of the first resource to an activated state.

[0020] In conjunction with the second aspect, in some implementations of the second aspect, the second terminal device determines the priority of the first feedback information according to the second information, and sends the first feedback information to the first terminal device. The second information includes at least any one of the following:

[0021] Retransmission resource reservation within the DRX activation period,

[0022] The reception of the first information by the second terminal device,

[0023] The quantity of the first resource.

[0024] The second terminal device determines whether to increase the priority of the first feedback information and the amount of increase in the priority through the second information. By increasing the priority, the first feedback information that needs to be sent can be sent as much as possible to avoid the occurrence of DTX.

[0025] According to a third aspect, a communication method is provided, including: a second terminal device receives first information from a first terminal device during a first discontinuous reception (DRX) activation state period, the first information including first control information, the first control information being used to reserve a first resource, the time domain resource of the first resource being located in a DRX sleep state period after the first DRX activation state period; the second terminal device determines the time domain resource state of the first resource based on the reception status of the first information, and the first feedback information is used to indicate the reception status of the first information by the second terminal device.

[0026] According to the communication method provided in the present application, when no feedback channel is configured between the second terminal device and the first terminal device or when a feedback channel is configured between the second terminal device and the first terminal device and the feedback channel is not enabled, the second terminal device determines the time domain resource status of the first resource based on the reception of the first information, and can try to take measures to re-receive the first information or avoid resource waste when the reception is successful.

[0027] In combination with the third aspect, in certain implementations of the third aspect, the second terminal device determines the time domain resource status of the first resource based on the reception of the first information.

[0028] Optionally, the second terminal device determines that the first information is received successfully and remains in a dormant state in the time domain resources of the first resource.

[0029] Optionally, the second terminal device determines that reception of the first information fails at the end of the first DRX activation state period, and converts the time domain resources of the first resource to an activation state.

[0030] Optionally, the second terminal device determines that the first information is received successfully and converts the time domain resource of the first resource to an activated state.

[0031] In a fourth aspect, a communication device is provided, comprising a unit for executing each step of the communication method in the above-mentioned first aspect and its implementation methods.

[0032] In a fifth aspect, a communication device is provided, comprising a unit for executing each step of the communication method in the above-mentioned second aspect and its various implementation methods.

[0033] In a sixth aspect, a communication device is provided, comprising a unit for executing each step of the communication method in the third aspect and its implementation methods.

[0034] In the seventh aspect, a communication device is provided, including a processor and a memory, wherein the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the communication device executes the communication method in any aspect of the first to third aspects above and its various implementation methods.

[0035] Optionally, the number of the processors is one or more, and the number of the memories is one or more.

[0036] Optionally, the memory may be integrated with the processor, or the memory may be provided separately from the processor.

[0037] Optionally, the communication device also includes a transmitter (transmitter) and a receiver (receiver).

[0038] In an eighth aspect, a computer program product is provided, the computer program product comprising: a computer program (also referred to as code, or instruction), which, when executed, enables a computer to execute the communication method in any one of the first to third aspects and their respective implementations.

[0039] In the ninth aspect, a computer-readable medium is provided, which stores a computer program (also referred to as code, or instruction) which, when executed on a computer, enables the computer to execute the communication method in any one of the first to third aspects and their respective implementations. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the architecture of the mobile communication system used in the embodiment of the present application.

[0041] Figure 2 It is a schematic diagram of an example of a communication method according to an embodiment of the present application.

[0042] Figure 3 It is a schematic diagram of the time period of the embodiment of the present application.

[0043] Figure 4 It is a schematic diagram of another example of the communication method of the embodiment of the present application.

[0044] Figure 5 It is a schematic diagram of another example of the communication method of the embodiment of the present application.

[0045] Figure 6 It is a schematic diagram of a communication device according to an embodiment of the present application.

[0046] Figure 7 It is a schematic diagram of another communication device according to an embodiment of the present application. DETAILED DESCRIPTION

[0047] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0048] The technical solutions of the embodiments of the present application can be applied to various communication systems, for example: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, fifth generation (5G) system or new radio (NR), etc.

[0049] The terminal device in the embodiments of the present application may refer to user equipment, access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device. The terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G network or a terminal device in a future evolved Public Land Mobile Network (PLMN), etc., and the embodiments of the present application are not limited to this.

[0050] In order to facilitate the description of the embodiment, the discontinuous reception DRX mechanism is first introduced.

[0051] DRX stands for discontinuous reception, and its purpose is to make the terminal device enter a sleep state (sleep), that is, a non-receiving state, when there is no data or the data demand is small, thereby reducing the power consumption caused by demodulating the downlink signal. When the base station and UE communicate, the DRX process is usually as follows: First, the base station configures the DRX parameters to the terminal device, and the terminal device determines when to enter the sleep state and when to enter the receiving / listening state based on the DRX parameters, thereby saving power consumption through the sleep state. The base station will send downlink data or downlink control signals to the terminal device when the terminal device is in an activated state, and will not send downlink data or control signals when the terminal device is in a dormant state. In the communication between the base station and the terminal device, the base station can sense when the terminal device is in an activated state and when it is in a dormant state.

[0052] When the DRX mechanism is introduced into the sidelink (SL) air interface transmission, since there is no core control node such as a base station and a mechanism for uniformly configuring the DRX parameters of all terminal devices, it is necessary to re-determine new rules based on the distributed system of SL air interface transmission.

[0053] like Figure 1 Shown is a schematic diagram of the architecture of a mobile communication system used in an embodiment of the present application.

[0054] In SL air interface transmission, the transceiver of wireless communication is a terminal device, which can be a vehicle-mounted communication module or other embedded communication module, or a user's handheld terminal device, including a mobile phone, a tablet computer, etc.

[0055] like Figure 2 A schematic diagram of an example of a communication method according to an embodiment of the present application is shown as follows: Figure 2 As shown, the method 200 includes:

[0056] S210, the first terminal device determines that the first feedback information from the second terminal device is not received after sending the first information.

[0057] like Figure 3 This is a relationship diagram of each time period in the embodiment of the present application. Figure 3 The embodiments of the present application are described below.

[0058] It should be noted that the first information is sent during the first DRX activation period. Figure 3As shown, the first DRX activation state period may, for example, specifically refer to a complete DRX activation state period within a certain cycle, and the first terminal device sends the first information for the first time at a certain time point within the first DRX activation state period. Optionally, before the first terminal device sends the first information for the first time, it is necessary to determine that the available resources between the certain time point and the end of the first DRX period are greater than or equal to the resources required to send the first information, that is, there are resources to carry the first information sent for the first time.

[0059] In a possible implementation, before sending the first information to the second terminal device, the first terminal device needs to obtain the DRX parameters of the second terminal device, and further determine the DRX active state period and the DRX sleep state period of the second terminal device according to the DRX parameters. It should be noted that the DRX active state period and the DRX sleep state period determined by the first terminal device are inferred by the first terminal device based on the DRX parameters. Since the first terminal device cannot sense in real time whether the second terminal device is in the active state or the sleep state, the first terminal device needs to send information to the second terminal device within the inferred DRX active state period of the second terminal device based on the DRX parameters.

[0060] It should be noted that the second terminal device can only receive information when it is in an activated state, and cannot receive information when it is in a sleep state. The activated state and the sleep state can be the DRX activated state or the DRX sleep state configured by the network device for the second terminal device, or the second terminal device can be converted from the DRX sleep state to the activated state according to the situation. However, when the second terminal device is converted from the sleep state to the activated state according to the situation, the first terminal device cannot perceive it, nor can it be inferred through the previously obtained DRX parameters, and can only make reasonable guesses based on, for example, preset rules.

[0061] In some embodiments, the first terminal device determines that discontinuous transmission DTX occurs when it does not receive the first feedback information from the second terminal device after sending the first information. Optionally, the first terminal device may determine that DTX occurs when it does not receive the first feedback information after a first time after sending the first information. The first time may be a preset time when the first terminal device should receive the first feedback information. For example, the first terminal device determines that DTX occurs when it does not receive the first feedback information on certain symbols after sending the first information. The certain symbols are the second to last and third symbols on the time slot after a preset interval after the first terminal device sends the first information.

[0062] The first feedback information includes the reception status of the first information by the second terminal device.

[0063] In some embodiments, there is no feedback channel between the first terminal device and the second terminal device, and the first terminal device cannot receive the first feedback information from the second terminal device. In this case, the first terminal device has not received the first feedback information, and the first terminal device will continue to retransmit on available resources.

[0064] S220, the first terminal device resends the first information to the second terminal device.

[0065] In some embodiments, if the first terminal device determines that the first feedback information is not received when the first information is sent for the first time, it determines whether the first retransmission resource is greater than or equal to the resource required for sending the first information. Further, the first terminal device needs to determine whether there is a first retransmission resource. If there is a first retransmission resource, whether the first retransmission resource is greater than or equal to the resource required for sending the first information. The first retransmission resource is located in the time domain from the time A when the first feedback information should be received to the end time B of the first DRX activation state period. In other words, the determination of whether the first retransmission resource is greater than or equal to the resource required for sending the first information can also be understood as whether there is a resource that can carry the first information in any time slot between A and B. If the first retransmission resource is greater than or equal to the resource required for sending the first information, in other words, there is a first retransmission resource that can carry the first information, the first terminal device resends the first information on the first retransmission resource. It should be noted that if the first terminal device does not receive the first feedback information when initially sending the first information, the time domain resources of the first retransmission resources start from the time when the first feedback information should be received at the initial transmission; if the first terminal device still does not receive the first feedback information after resending the first information, the time domain resources of the first retransmission resources start from the time when the first feedback information should be received at the retransmission. In other words, as long as the first feedback information has not been received, the first terminal device determines whether the remaining resources of the first DRX activation state period, i.e., the first retransmission resources, are greater than or equal to the resources required to send the first information; if they are greater than or equal to the resources required to send the first information, the first information is repeatedly sent until the first feedback information is received, or until the first DRX activation state period ends.

[0066] In some embodiments, the first terminal device determines that the first feedback information sent from the second terminal device has not been received at the end of the first DRX activation state period (for example, the determination process may be: the first terminal device determines that the first feedback information sent from the second terminal device has not been received after the first information is sent for the first time and the first retransmission resource is less than the resource required to send the first information, or the first terminal device does not receive the first feedback information sent from the second terminal device after the first information is sent for the first time and the first retransmission resource is greater than or equal to the resource required to send the first information, the first terminal device repeatedly sends the first information on the first retransmission resource but does not receive the first feedback information until the first retransmission resource is exhausted, so that the first terminal device has not received the first feedback information at the end of the first DRX activation state period), then the first terminal device determines whether the second retransmission resource (for example, the second retransmission resource is part or all of a DRX activation state period within the data packet delay margin range after the first DRX activation state period in the time domain, or it may be part or all of several DRX activation state periods within the data packet delay margin range after the first DRX activation state period) is greater than or equal to the resource required to send the first information. Specifically, as Figure 3 As shown, the time domain resource of the second retransmission resource is located in the DRX activation state period within the data packet delay margin range after the first DRX activation state period. When the first terminal device determines that the second retransmission resource is greater than or equal to the resource required to send the first information, in other words, there is a second retransmission resource that can carry the first information, the first terminal device repeats sending the first information on the second retransmission resource.

[0067] In some embodiments, the first terminal device determines that the first feedback information sent by the second terminal device has not been received at the end of the first DRX activation state period (the determination process is similar to the above embodiment) and the first terminal device determines that the second retransmission resource is less than the resource required to send the first information, then the first terminal device sends the first information on the first resource.

[0068] It should be noted that the first retransmission resource and the second retransmission resource are selected by the first terminal device based on information such as perception results.

[0069] It should be noted that the first resource is a reserved resource indicated by the first control information, and the first control information is included in the first information. The time domain resource of the first resource is located in the DRX dormant state period after the first DRX active state period of the second terminal device. The number of the first resources can be one, two or three. It should be noted that the time domain resource of the first resource is located in the DRX dormant state period after the first DRX active state period, and the first information should not be received. However, the first terminal device has not received the first feedback information sent from the second terminal device. It is speculated that after a certain situation occurs at the second terminal device, the second terminal device will convert the time domain resource corresponding to the first resource from the dormant state to the active state to receive the resent first information. The certain situation at the second terminal device will be described in detail in the following embodiments. There is a risk in resending the first information on the first resource, that is, the second terminal device does not convert the time domain resource corresponding to the first resource from the dormant state to the active state. Even if the first terminal device resends the first information, the second terminal device cannot receive it.

[0070] It should be noted that the first information includes the first control information and the data. In a possible implementation, the first control information includes the information for reserving the first resource and also includes the information for demodulating the data. As an example but not a limitation, the information for demodulating the data includes the ID of the target terminal device of the data information and other information. The second terminal device demodulates the first control information and demodulates the ID of the target terminal device and finds that it is the target terminal device. In this case, if a feedback channel is configured between the first terminal device and the second terminal device, the second terminal device will send the first feedback information to the first terminal device according to the data reception situation. The first feedback information indicates the reception situation of the first information. Furthermore, the first feedback information indicates the reception situation of the data information by the target terminal device. In this embodiment, the target terminal device is the second terminal device. In other words, under the premise that a feedback channel is configured between the first terminal device and the second terminal device, the second terminal device successfully demodulates the ID of the target terminal device in the first control information and finds that the target terminal device is itself. It will send the first feedback information to the first terminal device according to the reception situation of the data information.

[0071] The reasons why the first terminal device fails to receive the first feedback information may be as follows:

[0072] 1. The second terminal device fails to successfully demodulate the first control information included in the first information. Specifically, it fails to successfully demodulate the target terminal device ID included in the first control information. Furthermore, the second terminal device cannot obtain the first resource and cannot demodulate the data information. Therefore, the second terminal device does not send the first feedback information.

[0073] 2. The second terminal device successfully demodulates the first control information included in the first information, and further sends the first feedback information, but due to insufficient power (the second device needs to feed back multiple information at the same time, and the first feedback information is not sent because of low priority and the second device power is limited), the first feedback information is not sent. Optionally, the first control information is successfully demodulated and the ID of the target terminal device is determined to be itself, but the data information is not successfully demodulated, and the first feedback information may be NACK; Optionally, the first control information is successfully demodulated and the ID of the target terminal device is determined to be itself, and further, the data information is successfully demodulated, and the first feedback information may be ACK.

[0074] 3. The second terminal device successfully demodulates the first control information included in the first information, and further sends first feedback information. Optionally, the first control information is successfully demodulated, but the data information is not successfully demodulated, and the first feedback information may be NACK; optionally, the first control information and data information are successfully demodulated, and the first feedback information may be ACK. However, the first terminal device does not receive the first feedback information for some reason. As an example and not a limitation, the reason why the first terminal device fails to receive the first feedback information may be poor channel quality or interference, etc.

[0075] In the embodiment of the present application, when the first terminal device determines that DTX occurs, since the first terminal device does not know the reception status of the second terminal device, it resends the first information in the DRX activation state period within the allowed delay range as much as possible, thereby increasing the possibility that the second terminal device receives the first information.

[0076] like Figure 4 FIG. 1 is a schematic diagram of another example of the communication method according to an embodiment of the present application. Figure 4 As shown, the method 400 includes:

[0077] S410, the second terminal device receives first information from the first terminal device.

[0078] The first information includes first control information, the first control information is used to reserve a first resource, the time domain resource of the first resource is located in the DRX dormant state period after the first DRX active state period of the second terminal device, and the relationship between the time periods can be referred to Figure 3 Description.

[0079] It should be noted that the first information also includes data information. In addition to being used to reserve the first resource, the first control information also includes some information for demodulating the data information. In the embodiment of the present application, the second terminal device successfully demodulates the first control information to learn about the reservation status of the first resource and successfully demodulates the data information as successfully receiving the first information; the second terminal device successfully demodulates the first control information to learn about the reservation status of the first resource but fails to demodulate the data information as failing to receive the first information.

[0080] S420: The second terminal device determines the time domain resource state of the first resource according to the reception status of the first information and / or the priority of the first feedback information.

[0081] In an embodiment of the present application, a first terminal device and a second terminal device operate on a resource pool. The resource pool configuration parameters include feedback channel parameters. The second terminal device, the first terminal device, and other terminal devices operating in the resource pool determine the time domain position of the feedback channel according to the resource pool configuration parameters. The position of the feedback channel corresponds to the time domain position of the transmitted data. Therefore, when the first terminal device sends data to the second terminal device, the two determine the position of the feedback channel according to the time domain position of the transmitted data, and then the second terminal device sends feedback information at the corresponding position, and the first terminal device receives it at the corresponding position.

[0082] In some embodiments, if the second terminal device fails to send the first feedback information, the second terminal device converts the time domain resource corresponding to the first resource from a dormant state to an activated state. The reason why the second terminal device fails to send the first feedback information may be that the priority of the first feedback information is not in the transmission sequence of the feedback channel, and the second terminal device fails to send the first feedback information due to insufficient power. In this case, the second terminal device determines that the first terminal device will determine that DTX has occurred, and therefore switches the time domain resource corresponding to the first resource from a dormant state to an activated state to receive the first information resent by the first terminal device. Optionally, if the second terminal device successfully receives the first information, the first feedback information may be ACK, and the first feedback information is not sent, and the time domain resource corresponding to the first resource is converted from a dormant state to an activated state; optionally, if the second terminal device fails to receive the first information, the first feedback information may be NACK, and the first feedback information is not sent, and the time domain resource corresponding to the first resource is converted from a dormant state to an activated state.

[0083] In some embodiments, if the second terminal device successfully receives the first information, the second terminal device remains in a dormant state on the time domain resource corresponding to the first resource. In this case, the protocol defines that the first resource is used to retransmit the first information. If the second terminal device has successfully received the first information, the second terminal device determines that it does not need to receive the retransmitted first information, and the second terminal device remains in a dormant state on the first resource. Optionally, if the second terminal device successfully receives the first information and does not send the first feedback information, the second terminal device remains in a dormant state on the first resource; optionally, if the second terminal device successfully receives the first information and sends the first feedback information, the first feedback information may be ACK, and the second terminal device remains in a dormant state on the first resource.

[0084] In some embodiments, if the second terminal device fails to receive the first information at the end of the first DRX activation state period, the second terminal device converts the time domain resource corresponding to the first resource from the sleep state to the active state. In this case, regardless of whether the first resource is used for retransmission or transmission of other data, the second terminal device expects the first terminal device to retransmit the first information on the first resource, so the second terminal device converts the time domain resource corresponding to the first resource from the sleep state to the active state, expecting to receive the retransmitted first information on the first resource. Optionally, the second terminal device fails to receive the first information at the end of the first DRX activation state period, does not send the first feedback information, and the second terminal device converts the time domain resource corresponding to the first resource from the sleep state to the active state; Optionally, the second terminal device fails to receive the first information at the end of the first DRX activation state period, sends the first feedback information, and the first feedback information may be NACK, and the second terminal device converts the time domain resource corresponding to the first resource from the sleep state to the active state.

[0085] In some embodiments, if the second terminal device successfully receives the first information, the time domain resource corresponding to the first resource of the second terminal device is converted from a dormant state to an activated state. In this case, the protocol definition or the first terminal device sends an indication message indicating that the first resource can be used for the transmission of other data. In order to prevent failure in receiving other data, the second terminal device converts the time domain resource corresponding to the first resource from a dormant state to an activated state. Optionally, the second terminal device successfully receives the first information and does not send the first feedback message. The time domain resource corresponding to the first resource of the second terminal device is converted from a dormant state to an activated state. Optionally, the second terminal device successfully receives the first information and sends the first feedback message, which may be ACK. The time domain resource corresponding to the first resource of the second terminal device is converted from a dormant state to an activated state.

[0086] It should be noted that since the first terminal device and the second terminal device cannot perceive each other when DTX occurs between them, the second terminal device will infer the behavior of the first terminal device based on, for example, protocol predefinition or its own situation to ensure minimal resource waste and receive as much retransmission information as possible.

[0087] S430: The second terminal device determines the priority of the first feedback information, and further sends the first feedback information.

[0088] It should be noted that step S420 and step S430 are not sequential, and the two can be performed in parallel. As an example but not a limitation, in an implementation of step S420, before sending the first feedback information, the priority of the first feedback information can be determined first, but the first feedback information may still not be sent because the priority is not in the sending sequence of the feedback channel.

[0089] In order to avoid the occurrence of DTX as much as possible, the second terminal device will increase the priority of the first feedback information in the feedback channel as much as possible, so that the first feedback information can be sent out as much as possible, avoiding the situation in some scenarios where the first feedback information is not sent and has a greater impact on the second terminal device and the first terminal device.

[0090] The second terminal device mainly determines the priority of the first feedback information based on the second information, and the second information includes at least one of the following: the retransmission resource reservation status within the DRX activation state time period of the second terminal device, the reception status of the first information by the second terminal device, and the quantity of the first resources.

[0091] It should be noted that the second terminal device determines to increase the priority of the first feedback information to a certain level or determines the amount of priority increase of the first feedback information according to the second information. The greater the requirement for the first feedback information to be sent successfully, the higher the priority of the first feedback information should be to avoid the occurrence of DTX.

[0092] In some embodiments, when the following conditions are met, the second terminal device increases the priority of the first feedback information:

[0093] The first terminal device reserves the first resource in the DRX sleep state.

[0094] It should be noted that, in this embodiment, no matter whether the second terminal device determines that the first feedback information is NACK or ACK based on the reception of the first information, if the first terminal device has reserved the first resource in the DRX sleep state, the second terminal device increases the priority of the first feedback information.

[0095] Optionally, the second terminal device determines an amount of increase in the priority of the first feedback information according to the number of first resources.

[0096] In some embodiments, when the following conditions are met, the second terminal device increases the priority of the first feedback information:

[0097] 1. The first terminal device does not reserve retransmission resources during the DRX activation period of the second terminal device;

[0098] 2. The first terminal device reserves the first resource during the DRX dormant state period of the second terminal device;

[0099] 3. The second terminal device determines that the first feedback information is ACK based on the reception status of the first information.

[0100] Optionally, the second terminal device determines an amount of increase in the priority of the first feedback information according to the number of first resources.

[0101] In some embodiments, when the following conditions are met, the second terminal device increases the priority of the first feedback information:

[0102] 1. The first terminal device does not reserve retransmission resources during the DRX activation period of the second terminal device;

[0103] 2. The first terminal device reserves the first resource during the DRX dormant state period of the second terminal device;

[0104] 3. The second terminal device determines that the first feedback information is NACK based on the reception status of the first information.

[0105] Optionally, the second terminal device determines an amount of increase in the priority of the first feedback information according to the number of first resources.

[0106] As an example but not a limitation, in the above possible implementation, the method of increasing the priority is specifically as follows: the second terminal device determines that N feedback information needs to be sent, and the priority value of the feedback information with the lowest priority among the N feedback information is K, then the priority of the first feedback information is increased to a value higher than or equal to the priority of the feedback information with a priority value of K, or the priority value of the first feedback information is updated to a value less than or equal to K, so that the increased priority is higher than or equal to the priority of the feedback information with a priority value of K, thereby ensuring that the first feedback information can be sent. It should be understood that the smaller the priority value, the higher the priority level, and the easier it is to be sent.

[0107] In an embodiment of the present application, a feedback channel is configured between the second terminal device and the first terminal device. On the one hand, the second terminal device determines the priority of the first feedback information based on the second information, so that the first feedback information can be sent as much as possible to avoid the occurrence of DTX. On the other hand, the second terminal device determines the time domain resource status corresponding to the first resource based on the reception status of the first information, so as to be able to receive the resent first information when it is needed and avoid waste of resources.

[0108] It should be noted that in the SL air interface transmission system, the method of increasing the priority of feedback information is not limited to avoiding the occurrence of DTX scenarios. The second terminal device may determine the priority of the feedback information based on the third information, and the third information is not limited to at least any one of the following: transmission type, terminal resource selection type, first information demodulation result, DRX parameters, and the number of first resources. The terminal device determines to increase the priority of the feedback information to a certain level or determines the amount of increase in the priority of the feedback information based on the third information. The more third information that is met, or the greater the demand for the feedback information to be sent successfully, the higher the priority of the feedback information must be.

[0109] The transmission type can be: multicast, unicast. The terminal resource selection type can be: full perception, partial perception, random selection.

[0110] It should be noted that full perception means perception in all time slots, and resources are selected based on the perception results; partial perception means perception in some time slots, in order to reduce power consumption, resources are selected only based on the perception results in some time slots; random selection means no perception, and resources are selected randomly.

[0111] In combination with the above various embodiments, if the transmission type is multicast and the feedback information of the multicast data reception status is NACK, the priority of the feedback information is increased. If the terminal device is a power-constrained terminal device such as partial perception, random selection, etc., the priority of the feedback information is increased.

[0112] like Figure 5 A schematic diagram of another example of the communication method of the embodiment of the present application is shown as follows: Figure 5 As shown, the method 500 includes:

[0113] S510, the second terminal device receives first information from the first terminal device.

[0114] For the reception of the first information, please refer to the relevant description of S410 in method 400.

[0115] S520: The second terminal device determines the time domain resource state of the first resource according to the reception status of the first information.

[0116] In some embodiments, there is no feedback channel between the second terminal device and the first terminal device, or a feedback channel is configured between the second terminal device and the first terminal device, but the first information carries an indication of disabling feedback, which is included in the first control information, and the second terminal device can only judge the state of the time domain resource corresponding to the first resource based on its own reception of the first information and the protocol pre-definition. As an example and not limitation, the parameter of the disabling indication can be a HARQ feedback enabled / disabled indicator, for example, the parameter can be 1 bit.

[0117] In some embodiments, if the second terminal device successfully receives the first information, the second terminal device remains in a dormant state on the time domain resource corresponding to the first resource. In this case, the protocol defines that the first resource can be used to retransmit the first information. If the second terminal device has successfully received the first information, the second terminal device determines that it does not need to receive the retransmitted first information, and the second terminal device remains in a dormant state on the first resource.

[0118] In some embodiments, if the second terminal device fails to receive the first information at the end of the first DRX activation state period, the second terminal device converts the time domain resource corresponding to the first resource from a sleep state to an activation state. In this case, regardless of whether the first resource is used for retransmission or sending other data, the second terminal device expects the first terminal device to resend the first information on the first resource. Therefore, the second terminal device converts the time domain resource corresponding to the first resource from a sleep state to an activation state, expecting to receive the resent first information on the first resource.

[0119] In some embodiments, if the second terminal device successfully receives the first information, the second terminal device switches the time domain resource corresponding to the first resource from a sleep state to an active state. In this case, the protocol defines or the first terminal device sends an indication that the first resource can be used for the transmission of other data. In order to prevent the failure of receiving other data, the second terminal device switches the time domain resource corresponding to the first resource from a sleep state to an active state.

[0120] In some embodiments, when no feedback channel is configured between the second terminal device and the first terminal device, the second terminal device sets the state of the time domain resource of the first resource according to the reception situation of the first information, thereby receiving the first information resent by the first terminal device as much as possible when the reception of the first information fails, and avoiding power consumption loss caused by repeated reception of the first information as much as possible when the reception of the first information succeeds.

[0121] In some embodiments, after the first terminal device transmits for the first time, the first terminal device detects DTX, and selects resources on the resources before the end of the DRX activation state for one or more retransmissions, without considering the impact of the DRX mechanism on the reserved resources, so it transmits on the original second and third retransmission resources. However, since it is unknown whether the second terminal device starts the retransmission time on the second and third retransmission resources to enter the activation state, problems will arise.

[0122] Optionally, the resource position of the original second and third retransmissions, i.e., the first resource position, is carried during the retransmission to avoid wasting resources. Only when the feedback of the new retransmission is NACK, the second and third retransmission resources are transmitted; because at this time, the first terminal device believes that the second terminal device has successfully received the control information and converted to an active state on the reserved resources. If the new retransmission still encounters DTX, and the remaining DRX active state period is insufficient for resource selection for retransmission, the retransmission is not transmitted at the original second and third resource positions, i.e., the above-mentioned original second and third resource positions are unavailable resources (DRX dormant state period).

[0123] At the end of the DRX activation period in which the first transmission is located, no NACK or ACK, ie, the first feedback information, is received. The first terminal device decides whether to retransmit on the reserved resources according to the DRX activation period and the data packet delay margin.

[0124] Optionally, in a scenario, if there is a DRX activation period within the data packet delay margin range, the second and third retransmission resources originally reserved are not transmitted;

[0125] Optionally, in a scenario, within the data packet delay margin range, there is a DRX activation period and available resources can be screened out (such as the number of time slots, the number of resources or RSRP, etc. meet the requirements), then the second and third retransmission resources originally reserved are not transmitted;

[0126] Optionally, in a scenario where there is no DRX activation period within the data packet delay margin, or there is a DRX activation period but it does not meet the requirements (insufficient number of time slots, insufficient number of resources can be screened out, etc.), transmission is performed at the original second and third resource positions; at this time, the first terminal device understands that the second terminal device failed to transmit PFSCH due to insufficient PSFCH power.

[0127] In some embodiments, PSFCH resources are not configured when configuring the resource pool, that is, the value of the parameter "sl-HARQ-FeedbackEnabled" corresponds to "disabled" when configuring the resource pool. In this scenario, after the first terminal device sends a data packet, the second terminal device will not feedback ACK / NACK information regardless of the demodulation result, because there is no PSFCH resource in the resource pool. For this scenario, the first terminal device needs to classify the resources reserved for the first transmission. If the resources reserved for the first transmission are not used for the current second terminal device, the location of the reserved resources has nothing to do with the DRX activation period of the current second terminal device; if the resources reserved for the first transmission are for the current second terminal device, whether it is used for retransmission or new transmission of a data block, it needs to be within the DRX activation period of the current second terminal device; for multiple resources reserved for the first transmission, part of which is for the current second terminal device and the other part is for other terminal devices, the reserved resources for the current Rx UE need to be within the DRX activation period, and the reserved resources for other terminal devices do not need to consider the DRX activation period of the second terminal device. In this scenario, for the second terminal device, since there is no PSFCH feedback channel, the first terminal device cannot be informed whether the initial transmission is received successfully or not. Therefore, the second terminal device only receives the transmission of the first terminal device during the DRX active state period. If the second terminal device receives the resources reserved by the first terminal device within the DRX sleep state period, one implementation method is that the second terminal device maintains the DRX sleep state during the above-mentioned reserved resources. Another implementation method is that when the second terminal device still fails to receive PSSCH before the end of the DRX active state period, the second terminal device maintains the DRX active state during the above-mentioned reserved resources. When the second terminal device still successfully receives PSSCH before the end of the DRX active state period, the second terminal device maintains the DRX sleep state during the above-mentioned reserved resources, that is, whether the second terminal device wakes up on the resources reserved within the DRX sleep state period is determined based on whether the data reception in the DRX active state period is successful.

[0128] In some embodiments, the second terminal device avoids the DTX situation to a certain extent by increasing the priority of PSFCH.

[0129] Optionally, in case a, when there is no retransmission resource reservation within the DRX active state period, retransmission resources outside the range are reserved, and the initial transmission feedback is NACK, the priority of its PSFCH is increased to a certain level or the priority of its PSFCH is increased to a certain level. This approach is to prioritize the successful transmission of data corresponding to NACK; Optionally, the priority increase amount is configured according to the number of retransmission resources (1, 2, or 3) reserved within the DRX dormant state period. The logic of this approach is that the more resources there are, the greater the waste, so the priority should be increased;

[0130] Optionally, in case b, when there is no retransmission resource reservation within the DRX activation period, and retransmission resources outside the range are reserved, and the initial transmission feedback is ACK, the priority of its PSFCH is increased to a certain level or its PSFCH priority is increased to a certain level; similar to the above, the amount of priority increase is configured according to the number of retransmission resources reserved within the DRX sleep state range (1 or 2 or 3).

[0131] Optionally, in case c, when retransmission resources outside the DRX activation state are reserved and the initial transmission feedback is NACK / ACK, the priority of its PSFCH is increased to a certain level or the priority of its PSFCH is increased to a certain level.

[0132] In the embodiments of the present application, the problem of inconsistent understanding of the DRX activation state time caused by DTX can be avoided as much as possible. When it cannot be completely avoided, the duration of the inconsistent activation state caused by DTX can be reduced as much as possible by adjusting the amount of priority increase or increasing the priority.

[0133] Figure 6 Schematic diagram of a communication device 600 according to an embodiment of the present application. Each unit in the communication device 600 may be implemented by software. The communication device 600 includes: a transceiver unit 610 and a processing unit 620 .

[0134] In some embodiments, the communication device 600 may be the first terminal device in the above method embodiment, or may be a chip for implementing the functions of the first terminal device in the above method embodiment. It should be understood that the communication device 600 may correspond to the first terminal device in the method 200, method 400, and method 500 according to the embodiment of the present application, and the communication device 600 may perform the steps corresponding to the first terminal device in the method 200, method 400, and method 500 of the embodiment of the present application. It should be understood that the specific process of each unit performing the above corresponding steps has been described in detail in the above method embodiment, and for the sake of brevity, it will not be repeated here.

[0135] In some embodiments, the communication device 600 may be the second terminal device in the above method embodiment, or may be a chip for implementing the functions of the second terminal device in the above method embodiment. It should be understood that the communication device 600 may correspond to the second terminal device in the method 200, method 400, and method 500 according to the embodiment of the present application, and the communication device 600 may perform the steps corresponding to the second terminal device in the method 200, method 400, and method 500 of the embodiment of the present application. It should be understood that the specific process of each unit performing the above corresponding steps has been described in detail in the above method embodiment, and for the sake of brevity, it will not be repeated here. Figure 7 Schematic diagram of a communication device 700 according to an embodiment of the present application. The communication device 700 includes a transceiver 710 and a processor 720 .

[0136] Specifically, the transceiver 710 in the communication device 700 may correspond to the transceiver unit 610 in the communication device 600 , and the processor 720 in the communication device 700 may correspond to the processing unit 620 in the communication device 600 .

[0137] It should be understood that the specific process of each transceiver processor executing the above corresponding steps has been described in detail in the above method embodiment, and for the sake of brevity, it will not be repeated here.

[0138] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example 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 performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0139] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0140] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0141] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0142] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0143] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be embodied in the form of a software product, which is stored in a storage medium and includes a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, etc., various media that can store program codes.

Claims

1. A communication method, characterized in that: include: The first terminal device determines that after sending the first information, no first feedback information is received from the second terminal device, the first information is sent within a first discontinuous reception DRX activation state period of the second terminal device, and the first feedback information is used to indicate the reception status of the first information by the second terminal device; The first terminal device resends the first information to the second terminal device, where the first information includes first control information, where the first control information is used to reserve a first resource, and a time domain resource of the first resource is located in a DRX sleep state period after the first DRX active state period.

2. The method according to claim 1, characterized in that The method further comprises: The first terminal device obtains a DRX parameter of the second terminal device; The first terminal device determines a DRX activation state period of the second terminal device according to the DRX parameter; The first terminal device sends the first information to the second terminal device within the first DRX activation state period included in the DRX activation state period.

3. The method according to claim 1 or 2, characterized in that: The method further comprises: The first terminal device determines that the first retransmission resource is greater than or equal to the resource required to transmit the first information, and the time domain resource of the first retransmission resource starts at the time when the first feedback information should be received and ends at the end time of the first DRX activation state period; The first terminal device resending the first information to the second terminal device includes: The first terminal device resends the first information to the second terminal device on the first retransmission resource.

4. The method according to claim 1 or 2, characterized in that: The method further comprises: The first terminal device determines that the first feedback information is not received at the end of the first DRX activation state period; The first terminal device determines that the second retransmission resource is greater than or equal to the resource required to transmit the first information, and the time domain resource of the second retransmission resource is the DRX activation state period after the first DRX activation state period and within the data packet delay margin range; The first terminal device resending the first information to the second terminal device includes: The first terminal device resends the first information to the second terminal device on the second retransmission resource.

5. The method according to claim 1 or 2, characterized in that: The method further comprises: The first terminal device determines that the first feedback information is not received at the end of the first DRX activation state period; The first terminal device determines that the second retransmission resource is smaller than the resource required to transmit the first information, and the time domain resource of the second retransmission resource is the DRX activation state period after the first DRX activation state period and within the data packet delay margin range; The first terminal device resending the first information to the second terminal device includes: The first terminal device resends the first information to the second terminal device on the first resource.

6. The method according to claim 3, characterized in that The first terminal device determines that the first feedback information is not received at the end of the first DRX activation state period, specifically including: The first retransmission resource is smaller than a resource required to transmit the first information, or, The first terminal device determines that the first feedback information is not received after resending the first information to the second terminal device on the first retransmission resource.

7. A communication method, characterized in that: include: The second terminal device receives first information from the first terminal device in a first discontinuous reception DRX active state period, where the first information includes first control information, where the first control information is used to reserve a first resource, and a time domain resource of the first resource is located in a DRX sleep state period after the first DRX active state period; The second terminal device determines the time domain resource state of the first resource according to the reception status of the first information and / or the priority of the first feedback information, and the first feedback information is used to indicate the reception status of the first information by the second terminal device.

8. The method according to claim 7, characterized in that The second terminal device determines the time domain resource state of the first resource according to the reception status of the first information and / or the priority of the first feedback information, specifically including: The second terminal device determines that the first feedback information is not sent, and the time domain resource of the first resource is converted to an activated state, or, The second terminal device determines that the first information is received successfully, and remains in a dormant state in the time domain resource of the first resource, or, The second terminal device determines that the reception of the first information fails at the end of the first DRX activation state period, and the time domain resource of the first resource is converted to an activation state, or, The second terminal device determines that the first information is received successfully, and the time domain resource of the first resource is converted to an activated state.

9. The method according to claim 7 or 8, characterized in that: The method further comprises: The second terminal device determines the priority of the first feedback information according to second information, where the second information includes at least any one of the following: Retransmission resource reservation within the DRX activation period, The reception of the first information by the second terminal device, The quantity of the first resource.

10. The method according to claim 7 or 8, characterized in that: A feedback channel is configured between the second terminal device and the first terminal device, or a feedback channel is configured between the second terminal device and the first terminal device and the feedback channel is enabled.

11. A communication method, characterized in that: include: The second terminal device receives first information from the first terminal device in a first discontinuous reception DRX active state period, where the first information includes first control information, where the first control information is used to reserve a first resource, and a time domain resource of the first resource is located in a DRX sleep state period after the first DRX active state period; The second terminal device determines the state of the time domain resources of the first resource according to the reception of the first information.

12. The method according to claim 11, characterized in that The second terminal device determines, according to the reception of the first information, a state corresponding to the time domain resource of the first resource, specifically including: The second terminal device determines that the first information is received successfully, and remains in a dormant state in the time domain resource of the first resource, or, The second terminal device determines that the reception of the first information fails at the end of the first DRX activation state period, and the time domain resource of the first resource is converted to an activation state, or, The second terminal device determines that the first information is received successfully, and the time domain resource of the first resource is converted to an activated state.

13. The method according to claim 11 or 12, characterized in that: No feedback channel is configured between the second terminal device and the first terminal device, or a feedback channel is configured between the second terminal device and the first terminal device and the feedback channel is not enabled.

14. A communication device, characterized in that: include: a processor, configured to determine that first feedback information from a second terminal device is not received after sending first information, the first information being sent within a first discontinuous reception (DRX) activation state period of the second terminal device, and the first feedback information being used to indicate a reception status of the first information by the second terminal device; A transceiver is used to resend the first information to the second terminal device, where the first information includes first control information, where the first control information is used to reserve a first resource, and where the time domain resource of the first resource is located in a DRX sleep state period after the first DRX active state period.

15. The device according to claim 14, characterized in that The processor is further configured to obtain a DRX parameter of the second terminal device; Determine a DRX activation state period of the second terminal device according to the DRX parameter; The transceiver is further used to send the first information to the second terminal device within the first DRX activation state period included in the DRX activation state period.

16. The device according to claim 14 or 15, characterized in that The processor is further configured to determine that a first retransmission resource is greater than or equal to a resource required to transmit the first information, and a time domain resource of the first retransmission resource starts at a time when the first feedback information should be received and ends at an end time of the first DRX activation state period; The transceiver is used to resend the first information to the second terminal device, including: The transceiver is used to resend the first information to the second terminal device on the first retransmission resource.

17. The device according to claim 14 or 15, characterized in that The processor is further configured to: determining that the first feedback information is not received at the end of the first DRX active state period; Determine that a second retransmission resource is greater than or equal to a resource required to transmit the first information, and a time domain resource of the second retransmission resource is a DRX activation state period after the first DRX activation state period and within a data packet delay margin range; The transceiver is used to resend the first information to the second terminal device, including: The transceiver is used to resend the first information to the second terminal device on the second retransmission resource.

18. The device according to claim 14 or 15, characterized in that The processor is further configured to: determining that the first feedback information is not received at the end of the first DRX active state period; Determine that a second retransmission resource is smaller than a resource required to transmit the first information, and a time domain resource of the second retransmission resource is a DRX activation state period after the first DRX activation state period and within a data packet delay margin range; The transceiver is used to resend the first information to the second terminal device, including: The transceiver is used to resend the first information to the second terminal device on the first resource.

19. The device according to claim 16, characterized in that The processor determining that the first feedback information is not received at the end of the first DRX active state period specifically includes: The processor determines that the first retransmission resource is less than the resource required to transmit the first information, or, The processor determines that the first feedback information is not received after resending the first information to the second terminal device on the first retransmission resource.

20. A communication device, characterized in that: include: a transceiver, configured to receive first information from a first terminal device in a first discontinuous reception (DRX) active state period, wherein the first information includes first control information, the first control information is used to reserve a first resource, and a time domain resource of the first resource is located in a DRX sleep state period after the first DRX active state period; The processor is used to determine the time domain resource state of the first resource according to the reception status of the first information and / or the priority of first feedback information, and the first feedback information is used to indicate the reception status of the first information.

21. The device according to claim 20, characterized in that The processor determines, according to a reception condition of the first information or a priority of the first feedback information, a time domain resource state of the first resource, specifically including: The processor determines that the first feedback information is not sent, and the time domain resource of the first resource is converted to an activated state, or, The processor determines that the first information is received successfully, and the time domain resource of the first resource remains in a dormant state, or, The processor determines that reception of the first information fails at the end of the first DRX active state period, and the time domain resource of the first resource is converted to an active state, or, The processor determines that the first information is received successfully, and the time domain resource of the first resource is converted to an activated state.

22. The device according to claim 20 or 21, characterized in that The processor is further configured to: Determine the priority of the first feedback information according to the second information, where the second information includes at least any one of the following: Retransmission resource reservation within the DRX activation period, the reception of the first information, The quantity of the first resource.

23. The device according to claim 20 or 21, characterized in that A feedback channel is configured between the transceiver and the first terminal device, or a feedback channel is configured between the transceiver and the first terminal device and the feedback channel is enabled.

24. A communication device, characterized in that: include: A transceiver, configured to receive first information from a first terminal device in a first discontinuous reception (DRX) period, wherein the first information includes first control information, the first control information is used to reserve a first resource, and a time domain resource of the first resource is located in a DRX dormant state period after the first DRX active state period; The processor is used to determine the state of the time domain resources of the first resource according to the reception status of the first information.

25. The device according to claim 24, characterized in that The processor determines, according to a reception condition of the first information, a state corresponding to a time domain resource of the first resource, specifically including: The processor determines that the first information is received successfully, and the time domain resource of the first resource remains in a dormant state, or, The processor determines that reception of the first information fails at the end of the first DRX active state period, and the time domain resource of the first resource is converted to an active state, or, The processor determines that the first information is received successfully, and the time domain resource of the first resource is converted to an activated state.

26. The device according to claim 24 or 25, characterized in that A feedback channel is not configured between the transceiver and the first terminal device, or a feedback channel is configured between the transceiver and the first terminal device and the feedback channel is not enabled.

27. A computer-readable storage medium, characterized in that: The method comprises instructions, which, when executed on a first terminal device, cause the first terminal device to execute the method according to any one of claims 1 to 6.

28. A computer-readable storage medium, characterized in that: The method comprises instructions, which, when executed on a second terminal device, cause the second terminal device to execute the method according to any one of claims 7 to 10.

29. A computer-readable storage medium, characterized in that: The method comprises instructions, and when the instructions are executed on a second terminal device, the second terminal device executes the method according to any one of claims 11 to 13.

30. A computer program product, characterized in that The method comprises a computer program, and when the computer program is executed on a first terminal device, the first terminal device executes the method according to any one of claims 1 to 6.

31. A computer program product, characterized in that The method comprises a computer program, and when the computer program is executed on a second terminal device, the second terminal device executes the method according to any one of claims 7 to 10.

32. A computer program product, characterized in that The method comprises a computer program, and when the computer program is executed on a second terminal device, the second terminal device executes the method according to any one of claims 11 to 13.

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