WO2023116445A1

WO2023116445A1 - Communication method, apparatus and terminal

Info

Publication number: WO2023116445A1
Application number: PCT/CN2022/137433
Authority: WO
Inventors: 张惠英
Original assignee: 大唐移动通信设备有限公司
Priority date: 2021-12-21
Filing date: 2022-12-08
Publication date: 2023-06-29
Also published as: CN116321533A

Abstract

The invention relates to the technical field of wireless communication. Provided are a communication method, an apparatus, and a terminal. On the basis of the initial duration of a timer related to direct communication, determining whether an available sidelink SL resource in a resource pool meets a minimum available SL resource requirement; if the available SL resource does not meet the minimum available SL resource requirement, prolonging the duration of the timer, so that the available SL resource in the time span of the extended duration from starting the timer meets the minimum available SL resource requirement; starting the timer, causing a terminal to be in an activated state before the timer expires. By means of the communication method, when a terminal directly communicates, it can be ensured that after each time the terminal enters the SL DRX and/or DTX active state, the terminal can transmit and receive data.

Description

A communication method, device and terminal

Cross References to Related Applications

This application claims the priority of the Chinese patent application with the application number 202111571507.9 and the application title “A Communication Method and Terminal” submitted to the China Patent Office on December 21, 2021, the entire contents of which are incorporated in this application by reference.

technical field

The present application relates to the technical field of wireless communication, and in particular to a communication method, device and terminal.

Background technique

In a mobile communication system based on shared channels, the base station scheduler is responsible for controlling the transmission of uplink and downlink data. When the base station scheduler determines to schedule any user, it can notify the terminal to send or receive data through the control channel. The terminal monitors the control channel, and when monitoring the scheduling information, completes the sending or receiving of data according to the instruction of the control channel.

In the activated state, since the terminal is not sure when the base station will schedule it, the terminal needs to continuously monitor the control channel and analyze each subframe of the downlink scheduling control channel to determine whether it is scheduled. However, when the terminal continuously monitors the control channel, power consumption will increase. In order to solve this problem, the cellular network communication system adopts the DRX (Discontinuous Reception, discontinuous reception) working mode, so that the terminal can monitor the control channel periodically.

However, in direct communication, direct communication can only be sent and received based on logical time slot resources in the resource pool, and when the terminal enters the active state based on the SL (Sidelink, direct link) DRX period start timer, it may It may happen that during the entire running period of the timer, there are no available SL resources or insufficient SL available resources, which will cause the terminal to fail to perform data transmission and reception even if it enters the DRX activation state.

Contents of the invention

The embodiment of the present application provides a communication method, device and terminal, which can ensure that the terminal can transmit and receive data after entering the SL DRX and/or DTX activation state each time during direct communication.

In the first aspect, the embodiment of the present application provides a communication method, the method including:

According to the initial duration of the timer related to direct communication, determine whether the SL available resources of the direct link in the resource pool meet the minimum SL available resource requirement;

If the SL available resource does not meet the minimum SL available resource requirement, extend the duration of the timer, so that the SL available resource within the time span from starting the timer to the extended duration meets the minimum SL available resource resource requirements;

The timer is started, so that the terminal is in an active state before the timer expires.

In an optional embodiment, the terminal being in the active state before the timer expires is: the terminal monitors the SL control channel on the SL available resources before the timer expires, or the terminal Send data on SL available resources before timeout.

In an optional embodiment, the SL available resource meeting the minimum SL available resource requirement is that the SL available resource is greater than or equal to the minimum SL available resource.

In an optional embodiment, the timer is used to identify that SL discontinuous reception DRX/discontinuous transmission DTX is active; the timer includes at least one of the following:

SL DRX/DTX duration timer;

SL DRX/DTX inactivity timer;

SL DRX/DTX retransmission timer;

SL DRX/DTX minimum available resource timer.

In an optional embodiment, the SL DRX/DTX minimum available resource timer is at least A timer starts simultaneously.

In an optional embodiment, the SL DRX/DTX minimum available resource timer is started simultaneously with the SL DRX/DTX duration timer or the SL DRX/DTX inactivity timer or the SL DRX/DTX retransmission timer , the SL DRX/DTX minimum available resource timer duration can be based on the same or different minimum SL available resource as other timers started at the same time.

In an optional embodiment, the minimum SL available resource is configured by the base station for the terminal through dedicated signaling, broadcast or pre-configuration; or, the minimum SL available resource is configured by the sending terminal, and the sending The terminal sends the configured minimum SL available resources to the receiving terminal through SL control plane signaling, SL media access control unit MAC CE or direct link control information SCI.

In an optional embodiment, the SL available resources include at least one of the following:

SL logical slot number;

Number of SL subchannels;

Number of SL physical resource blocks.

In a second aspect, an embodiment of the present application provides a communication device, and the communication device includes:

The determination unit is configured to determine whether the available resources of the direct link SL in the resource pool meet the minimum SL available resource requirement according to the initial duration of the timer related to the direct communication;

An extension unit, configured to extend the duration of the timer if the SL available resources do not meet the minimum SL available resource requirement, so that the SL available resources in the time span from starting the timer to the extended duration meet said minimum SL available resource requirement;

The enabling unit is configured to enable the timer, so that the terminal is in an active state before the timer expires.

In a third aspect, an embodiment of the present application provides a communication terminal, the communication terminal comprising: at least one processor; a transceiver communicatively connected to the at least one processor; and a memory communicatively connected to the at least one processor ; wherein, the transceiver performs data reception and transmission under the control of a processor; the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor, enabling the at least one processor to perform the following steps:

SL DRX/DTX duration timer;

SL DRX/DTX inactivity timer;

SL DRX/DTX retransmission timer;

SL DRX/DTX minimum available resource timer.

SL logical slot number;

Number of SL subchannels;

Number of SL physical resource blocks.

In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, the storage medium stores computer instructions, and when the computer instructions are executed by a processor, the method described in any one of the first aspects is implemented.

The communication method, device, and terminal provided in the embodiments of the present application can determine whether the available resources of the direct link SL in the resource pool meet the minimum SL available resource requirement according to the initial duration of the timer related to direct communication; if the SL available resource does not meet the minimum SL available resource requirements, then extend the duration of the timer, so that the SL available resources in the time span from the start of the timer to the extended duration meet the minimum SL available resource requirements; active until the timer times out. Through this communication method, when the terminal performs direct communication, it can be guaranteed that the terminal can send and receive data after entering the SL DRX and/or DTX (Discontinuous Transmission, discontinuous transmission) activation state each time.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present application. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a schematic structural diagram of a communication network applicable to an embodiment of the present application;

FIG. 2 is a schematic flowchart of a communication method provided in an embodiment of the present application;

FIG. 3 is a schematic diagram of an extended timer duration provided by an embodiment of the present application;

FIG. 4 is a schematic diagram of another extended timer duration provided by the embodiment of the present application;

FIG. 5 is a schematic diagram of another extended timer duration provided by the embodiment of the present application;

FIG. 6 is a schematic diagram of another extended timer duration provided by the embodiment of the present application;

FIG. 7 is a structural block diagram of a terminal provided in an embodiment of the present application;

FIG. 8 is a schematic structural diagram of a terminal provided by an embodiment of the present application.

Detailed ways

The specific implementation manners of the present application will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementations described here are only used to illustrate and explain the present application, and are not intended to limit the present application.

It should be noted that "first" and "second" in the embodiments of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. The "and/or" in the embodiment of this application describes the association relationship of associated objects, indicating that there may be three relationships. For example, A and/or B may indicate: A exists alone, A and B exist simultaneously, and A and B exist independently. There are three cases of B. The character "/" generally indicates that the contextual objects are an "or" relationship.

The network architecture and business scenarios described in the embodiments of the present application are for more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute limitations on the technical solutions provided by the embodiments of the present application. For the evolution of architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems.

FIG. 1 is a schematic structural diagram of a communication network applicable to an embodiment of the present application. The communication system includes a terminal 101 , a terminal 102 and a network side device 103 . Wherein, the terminal 101 and the terminal 102 can also be referred to as terminal equipment or user equipment (User Equipment, UE), and the terminal 101 and the terminal 102 can be mobile phones, tablet computers (Tablet Personal Computer), laptop computers (Laptop Computer), personal Terminal side devices such as digital assistant (Personal Digital Assistant, PDA), mobile Internet device (Mobile Internet Device, MID), wearable device (Wearable Device) or vehicle-mounted equipment.

The network side device 103 can be a base station or a core network, and the base station can be a base station of 5G and later versions (for example: gNB, 5G NR NB, etc.), or a base station in other communication systems (for example: eNB, WLAN access point, or other access point, etc.), the base station can be called Node B, eNode B, access point, base transceiver station (Base Transceiver Station, BTS), radio base station, radio transceiver, Basic Service Set (Basic Service Set, BSS ), Extended Service Set (ESS), Node B, Evolved Node B (eNB), Home Node B, Home Evolved Node B, WLAN access point, WiFi node, or some other suitable As long as the same technical effect is achieved, the base station is not limited to specific technical terms. It should be noted that the embodiment of the present application only uses the base station in the NR system as an example, but does not limit the specific type of the base station. The base station can communicate with terminal 101 and terminal 102 under the control of a base station controller, which can be part of the core network or some base stations.

The terminal 101 and the terminal 102 can perform data transmission with the network side device 103 through the Uu interface.

Terminal 101 and terminal 102 may also communicate directly through a direct link. Since in direct communication, direct communication can only be sent and received based on the logical time slot resources in the resource pool, and when the terminal enters the active state based on the SL DRX cycle start timer, it may occur during the operation of the entire timer During this period, if there are no available SL resources or insufficient available SL resources, even if the terminal enters the DRX activation state, it cannot perform data transmission and reception.

Based on this, embodiments of the present application provide a communication method, device, and terminal, which can determine whether the available resources of the direct link SL in the resource pool meet the minimum SL available resource requirement according to the initial duration of the timer related to direct communication; if the SL is available If the resources do not meet the minimum SL available resource requirements, then extend the duration of the timer, so that the SL available resources in the time span from the start of the timer to the extended duration meet the minimum SL available resource requirements; start the extended timer, Keep the terminal active until the timer expires. Through this communication method, when the terminal performs direct communication, it can be ensured that the terminal can send and receive data every time it enters the SL DRX and/or DTX activation state.

Fig. 2 shows a schematic flow diagram of a communication method provided by an embodiment of the present application. The communication method can be executed by a sending terminal or a receiving terminal for direct communication. For example, it can be performed by terminal 101 or terminal 102 in Fig. 1 implement. As shown in Figure 2, the method includes the following steps:

Step S201, according to the initial duration of the timer related to the direct communication, determine whether the SL available resources of the direct link in the resource pool meet the minimum SL available resource requirement.

Among them, the initial duration is configured or pre-configured; SL available resources can be at least one of SL logical time slot number, SL subchannel number and SL physical resource block number (physical resource block, PRB); the minimum SL available resource can be It is configured by the base station to the terminal through dedicated signaling, broadcast or pre-configuration, and may also be configured by the sending terminal. After the sending terminal configures the minimum SL available resources, the sending terminal can pass SL control plane signaling, SL MAC CE (Medium Access Control Control Element media access control unit) or SCI (Sidelink Control Information, direct link control information). The configured minimum SL available resources are sent to the receiving terminal.

The timer can be used to control the state of SL DRX/DTX. For example, the timer is active during the immediate period and inactive after timeout, and the timer can be SL DRX/DTX duration timer (on Duration Timer), SL DRX At least one timer in /DTX inactivity timer (Inactivity Timer), SL DRX/DTX retransmission timer (Retransmission Timer) and SL DRX/DTX minimum available resource timer; where, SL DRX/DTX retransmission timing The device can also be called SL DRX/DTX HARQ (Hybrid Automatic Repeat reQuest, hybrid automatic repeat request) retransmission timer.

Step S202, if the SL available resources do not meet the minimum SL available resource requirement, extend the duration of the timer, so that the SL available resources within the time span from the start of the timer to the extended duration meet the minimum SL available resource requirement.

Step S203, start the timer, so that the terminal is in an active state before the timer expires.

In an optional implementation manner, the terminal being in the active state before the timer expires refers to: the terminal monitors the SL control channel on the SL available resources before the timer expires, or the terminal monitors the SL control channel on the SL available resources before the timer expires. Send data on. Exemplarily, the DSL control channel may be continuously monitored on each available SL resource, or, when data needs to be sent, an available resource may be selected on the available SL resource to send data.

In an optional implementation, if the SL available resources meet the minimum SL available resource requirements, start the timer according to the initial duration of the timer; if the SL available resources do not meet the minimum SL available resource requirements, extend the timer duration , so that the SL available resources in the time span from the start of the timer to the extended duration meet the minimum SL available resource requirement. Wherein, the SL available resource meeting the minimum SL available resource requirement means that the SL available resource is greater than or equal to the minimum SL available resource; the SL available resource not meeting the minimum SL available resource requirement means that the SL available resource is smaller than the minimum SL available resource.

In an optional implementation manner, if the SL available resources in the resource pool are less than the configured minimum SL available resources within the initial duration of the timer, it is determined that the SL available resources in the resource pool are greater than or equal to the minimum SL available resources The required target duration of time is set, and the target duration is set as the duration of the timer.

Specifically, the timer is SL DRX/DTX on Duration Timer, and the SL available resource is the number of SL logical time slots as an example for illustration.

Assume that UE1 and UE2 perform SL unicast communication, where UE1 is the sending terminal and UE2 is the receiving terminal; the base station can send configuration information to UE1 through dedicated signaling, broadcast or pre-configuration, where the configuration information includes DRX/DTX The period of SL DRX/DTX on Duration Timer is 200ms, the SL DRX/DTX on Duration Timer is 4ms, and the minimum available resource of SL is 4 logical time slots; among them, the time used by one logical time slot is 1ms.

Exemplarily, in an embodiment, as shown in FIG. 3 , the time slot marked with X indicates that the time slot cannot be used for SL communication, that is, in the first SL DRX/DTX cycle, the fifth logical time slot The slot and the seventh logical time slot are logical time slots that cannot be used for SL communication. In the second SL DRX/DTX cycle, the second logical time slot, the fourth logical time slot and the sixth logical time slot A slot is a logical time slot that cannot be used for SL communication.

In the first SL DRX/DTX cycle, within the initial duration of SL DRX/DTX on Duration Timer, that is, from the fifth logical time slot to the eighth logical time slot, there are 2 logics that cannot be used for SL communication The time slot cannot meet the requirements of the minimum SL available resources, so it needs to be re-determined. When the SL available resources are equal to the minimum SL available resources, the required target duration can be seen from Figure 3. When the target duration is 6ms, the SL available resources are equal to the minimum SL Available resources, so the actual duration of SL DRX/DTX on Duration Timer can be set to 6ms.

Through the above method, after extending the duration of SL DRX/DTX on Duration Timer, UE1 and UE2 start SL DRX/DTX on Duration Timer at the beginning of the fifth logical time slot, that is, UE1 and UE2 enter the active state, and the activation of UE1 and UE2 The time is 6ms.

In the second SL DRX/DTX cycle, within the initial duration of SL DRX/DTX on Duration Timer, that is, from the first logical time slot to the fourth logical time slot, there are 2 logics that cannot be used for SL communication The time slot cannot meet the requirements of the minimum SL available resources, so it needs to be re-determined. When the SL available resources are equal to the minimum SL available resources, the required target duration can be seen from Figure 3. When the target duration is 7ms, the SL available resources are equal to the minimum SL Available resources, so the actual duration of SL DRX/DTX on Duration Timer can be set to 7ms.

Through the above method, after extending the duration of SL DRX/DTX on Duration Timer, UE1 and UE2 start SL DRX/DTX on Duration Timer at the beginning of the first logical time slot, that is, UE1 and UE2 enter the active state, and the activation of UE1 and UE2 The time is 7ms.

In another optional implementation manner, if within the initial duration, if the available SL resources in the resource pool are less than the minimum available SL resources, the duration of the timer is gradually extended according to the set step until the Until the available SL resource in the resource pool is greater than or equal to the minimum available SL resource, the setting step can be 1 ms or 2 ms, which is not limited in this application.

Specifically, in one embodiment, as shown in Figure 3, in the first SL DRX/DTX cycle, within the initial duration of SL DRX/DTX on Duration Timer, that is, from the fifth logical time slot to the first Eight logical time slots, there are 2 logical time slots that cannot be used for SL communication, and cannot meet the requirements of the minimum available resources of SL, then gradually extend the duration of SL DRX/DTX on Duration Timer according to the step size of 1ms, after extending it twice , the SL available resources can be equal to the minimum SL available resources. Therefore, the SL DRX/DTX on Duration Timer can be extended by 2 ms on the basis of the initial SL DRX/DTX on Duration Timer duration, that is, at the first SL DRX In the /DTX cycle, the actual duration of SL DRX/DTX on Duration Timer is 6ms.

In the second SL DRX/DTX cycle, as shown in Figure 3, within the initial duration of the SL DRX/DTX on Duration Timer, that is, from the first logical time slot to the fourth logical time slot, there are two The logical time slot used for SL communication cannot meet the requirements of the minimum available SL resource, then gradually extend the duration of SL DRX/DTX on Duration Timer according to the step size of 1 ms, after extending 3 times, the available SL resource can be equal to the minimum SL available resources. Therefore, based on the initial duration of SL DRX/DTX on Duration Timer, the duration of SL DRX/DTX on Duration Timer can be extended by 3ms, that is, in the second SL DRX/DTX cycle, the duration of SL DRX/DTX on Duration Timer The actual duration is 7ms.

In another optional implementation manner, the activation time of UE1 and UE2 may be extended by using the SL DRX/DTX minimum available resource timer. Specifically, when UE1 and UE2 start any kind of timer, they can start the SL DRX/DTX minimum available resource timer at the same time, and when any timer is in the starting state, UE1 and UE2 are both in the active state.

Take the timer as SL DRX/DTX on Duration Timer and SL DRX/DTX minimum available resource timer, and the SL available resource is the number of SL logical time slots as an example. Among them, the initial duration of SL DRX/DTX minimum available resource timer is 0ms.

Assume that UE1 and UE2 perform SL unicast communication, where UE1 is the sending terminal and UE2 is the receiving terminal; the base station can send configuration information to UE1 through dedicated signaling, broadcast or pre-configuration, where the configuration information includes DRX/DTX The period of the SL DRX/DTX on Duration Timer is 200ms, the SL DRX/DTX on Duration Timer is 4ms, the SL DRX/DTX minimum available resource timer is 0ms, and the SL minimum available resource is 4 logical time slots; among them, the time used for one logical time slot is 1ms.

Exemplarily, in one embodiment, as shown in FIG. 4, the time slot marked with X indicates that the time slot cannot be used for SL communication, that is, in the first SL DRX/DTX cycle, the fifth logical time slot The slot and the seventh logical time slot are logical time slots that cannot be used for SL communication. In the second SL DRX/DTX cycle, the second logical time slot, the fourth logical time slot and the sixth logical time slot A slot is a logical time slot that cannot be used for SL communication.

In the first SL DRX/DTX cycle, the duration of the SL DRX/DTX minimum available resource timer can be determined based on the SL minimum available resource, that is, starting from the beginning of the fifth logical time slot, it is determined when the SL available resource is equal to the minimum The duration required for SL available resources is the duration of the SL DRX/DTX minimum available resource timer. It can be seen from FIG. 4 that the determined SL DRX/DTX minimum available resource timer has a duration of 6ms.

Through the above method, after determining the duration of the SL DRX/DTX minimum available resource timer, UE1 and UE2 start the SL DRX/DTX on Duration Timer at the beginning of the fifth logical time slot, and start the SL DRX/DTX minimum available resource timer at the same time , that is, UE1 and UE2 enter the active state, and the activation time of UE1 and UE2 is 6ms.

In the second SL DRX/DTX cycle, the duration of the SL DRX/DTX minimum available resource timer can be determined based on the SL minimum available resource, that is, starting from the beginning of the first logical time slot, it is determined when the SL available resource is equal to the minimum When SL resources are available, the required duration is the duration of the SL DRX/DTX minimum available resource timer. It can be seen from FIG. 4 that the determined SL DRX/DTX minimum available resource timer has a duration of 7ms.

Through the above method, after determining the duration of the SL DRX/DTX minimum available resource timer, UE1 and UE2 start the SL DRX/DTX on Duration Timer at the beginning of the first logical time slot, and start the SL DRX/DTX minimum available resource timer at the same time , that is, UE1 and UE2 enter the activation state, and the activation time of UE1 and UE2 is 7ms.

In another optional implementation manner, the timer may be two of SL DRX/DTX on Duration Timer, SL DRX/DTX Inactivity Timer and SL DRX/DTX Retransmission Timer.

Specifically, the timers are SL DRX/DTX on Duration Timer and SL DRX/DTX Inactivity Timer, and the SL available resources are the number of SL logical time slots as an example.

Assume that UE1 and UE2 perform SL unicast communication, where UE1 is the sending terminal and UE2 is the receiving terminal; the base station can send configuration information to UE1 through dedicated signaling, broadcast or pre-configuration, where the configuration information includes DRX/DTX The cycle of SL DRX/DTX on Duration Timer is 200ms, SL DRX/DTX on Duration Timer is 4ms, SL DRX/DTX Inactivity Timer is 6ms, and the minimum available resource of SL is 4 logical time slots; among them, the time used for one logical time slot is 1ms.

Exemplarily, in one embodiment, as shown in FIG. 5, the time slot marked with X indicates that the time slot cannot be used for SL communication, that is, in the first SL DRX/DTX cycle, the fifth logical time slot The slot and the seventh logical time slot are logical time slots that cannot be used for SL communication. In the second SL DRX/DTX cycle, the sixth logical time slot, the eighth logical time slot and the ninth logical time slot A slot is a logical time slot that cannot be used for SL communication.

In the first SL DRX/DTX cycle, within the initial duration of SL DRX/DTX on Duration Timer, that is, from the first logical time slot to the fourth logical time slot, there is no logical time that cannot be used for SL communication Therefore, it can meet the requirements of the minimum available resources of SL; within the initial duration of SL DRX/DTX Inactivity Timer, that is, from the third logical time slot to the eighth logical time slot, there are 2 inactivity that cannot be used for SL communication Logical time slots, that is, SL available resources are 4 logical time slots, which meet the requirements of SL minimum available resources; therefore, in the first SL DRX/DTX cycle, there is no need to configure SL DRX/DTX on Duration Timer and SL DRX/DTX The duration of Inactivity Timer is extended.

UE1 and UE2 start SL DRX/DTX on Duration Timer at the beginning of the first logical time slot, that is, UE1 and UE2 enter the active state. At T1 time, that is, at the beginning of the third logical time slot, UE1 sends a data packet to UE2, and UE1 Start SL DRX/DTX Inactivity Timer with UE2, the activation time of UE1 and UE2 is 8ms.

In the second SL DRX/DTX cycle, within the initial duration of SL DRX/DTX on Duration Timer, that is, from the first logical time slot to the fourth logical time slot, there is no logical time that cannot be used for SL communication Therefore, it can meet the requirements of the minimum available resources of SL; within the initial duration of SL DRX/DTX Inactivity Timer, that is, from the fourth logical time slot to the ninth logical time slot, there are 3 inactivity that cannot be used for SL communication Logical time slots, that is, the available resources of SL are 3 logical time slots, which do not meet the requirements of the minimum available resources of SL; therefore, it is necessary to gradually extend the duration of SL DRX/DTX Inactivity Timer according to the step size of 1 ms. After one extension, it can be used SL available resources are equal to the minimum SL available resources, therefore, the duration of SL DRX/DTX Inactivity Timer can be extended by 1 ms on the basis of the initial duration of SL DRX/DTX Inactivity Timer, that is, in the second SL DRX/DTX cycle, SL The actual duration of DRX/DTX Inactivity Timer is 7ms.

UE1 and UE2 start the SL DRX/DTX on Duration Timer at the beginning of the first logical time slot, that is, UE1 and UE2 enter the active state. At T2, that is, at the beginning of the fourth logical time slot, UE1 sends a data packet to UE2, and UE1 Start the SL DRX/DTX Inactivity Timer with UE2, and the activation time of UE1 and UE2 is 10ms.

In another optional implementation manner, in addition to configuring the same minimum SL available resources for different timers, different minimum SL available resources may also be configured for different timers.

Specifically, the timer is SL DRX/DTX on Duration Timer, SL DRX/DTX Inactivity Timer and SL DRX/DTX Retransmission Timer, and the SL available resource is the number of SL logical time slots as an example.

Assume that UE1 and UE2 perform SL unicast communication, where UE1 is the sending terminal and UE2 is the receiving terminal; the base station can send configuration information to UE1 through dedicated signaling, broadcast or pre-configuration, where the configuration information includes DRX/DTX The cycle of SL DRX/DTX on Duration Timer is 200ms, SL DRX/DTX on Duration Timer is 4ms, and the minimum available resource of SL DRX/DTX on Duration is 4 logical time slots; SL DRX/DTX Inactivity Timer is 4ms, and the minimum available resource of SL DRX/DTX Inactivity is 3 Logical time slots, SL DRX/DTX HARQ RTT (Round Trip Time, round-trip time) Timer is 0ms, SL DRX/DTX Retransmission Timer is 4ms, and the minimum available resource for SL DRX/DTX Retransmission is 4 logical time slots; The time used for the logical time slot is 1 ms.

Exemplarily, in one embodiment, as shown in FIG. 6, the time slot marked with X indicates that the time slot cannot be used for SL communication, that is, in the first SL DRX/DTX cycle, the fifth logical time slot The slot and the seventh logical time slot are logical time slots that cannot be used for SL communication. In the second SL DRX/DTX cycle, the sixth logical time slot, the eighth logical time slot and the ninth logical time slot A slot is a logical time slot that cannot be used for SL communication.

In the first SL DRX/DTX cycle, within the initial duration of SL DRX/DTX on Duration Timer, that is, from the first logical time slot to the fourth logical time slot, there is no logical time that cannot be used for SL communication Therefore, it can meet the minimum available resource requirements of SL DRX/DTX on Duration; within the initial duration of SL DRX/DTX Inactivity Timer, that is, from the third logical time slot to the sixth logical time slot, there is one that cannot The logical time slots used for SL communication, that is, the available resources of SL are 3 logical time slots, which can meet the requirements of the minimum available resources of SL DRX/DTX Inactivity; within the initial duration of SL DRX/DTX Retransmission Timer, that is, from the third From the logical time slot to the sixth logical time slot, there is one logical time slot that cannot be used for SL communication, that is, the available resources of SL are 3 logical time slots, which do not meet the minimum available resource requirements of SL DRX/DTX Retransmission, so it is required Gradually extend the duration of the SL DRX/DTX Retransmission Timer in steps of 1 ms. After 2 extensions, the SL available resources can be equal to the minimum SL available resources. Therefore, based on the initial duration of the SL DRX/DTX Retransmission Timer, the The duration of SL DRX/DTX Retransmission Timer is extended by 2ms, that is, in the first SL DRX/DTX cycle, the actual duration of SL DRX/DTX Retransmission Timer is 6ms.

Through the above method, after extending the duration of the SL DRX/DTX Retransmission Timer, UE1 and UE2 start the SL DRX/DTX on Duration Timer at the beginning of the first logical time slot, that is, UE1 and UE2 enter the active state. At the beginning of the three logical time slots, UE1 sends a data packet to UE2, UE1 and UE2 start SL DRX/DTX Inactivity Timer, and start SL DRX/DTX Retransmission Timer at the same time. The activation time of UE1 and UE2 is 8ms.

In the second SL DRX/DTX cycle, within the initial duration of SL DRX/DTX on Duration Timer, that is, from the first logical time slot to the fourth logical time slot, there is no logical time that cannot be used for SL communication Therefore, it can meet the minimum available resource requirements of SL DRX/DTX on Duration; within the initial duration of SL DRX/DTX Inactivity Timer, that is, from the fourth logical time slot to the seventh logical time slot, there is one that cannot The logical time slots used for SL communication, that is, the available resources of SL are 3 logical time slots, which can meet the requirements of the minimum available resources of SL DRX/DTX Inactivity; within the initial duration of SL DRX/DTX Retransmission Timer, that is, from the fourth From the logical time slot to the seventh logical time slot, there is a logical time slot that cannot be used for SL communication, that is, the available resources of SL are 3 logical time slots, which do not meet the minimum available resource requirements of SL DRX/DTX Retransmission, so it is required Gradually extend the duration of the SL DRX/DTX Retransmission Timer in steps of 1 ms. After 3 extensions, the SL available resources can be equal to the minimum SL available resources. Therefore, based on the initial duration of the SL DRX/DTX Retransmission Timer, the The duration of SL DRX/DTX Retransmission Timer is extended by 3ms, that is, in the second SL DRX/DTX cycle, the actual duration of SL DRX/DTX Retransmission Timer is 7ms.

Through the above method, after extending the duration of the SL DRX/DTX Retransmission Timer, UE1 and UE2 start the SL DRX/DTX on Duration Timer at the beginning of the first logical time slot, that is, UE1 and UE2 enter the active state. At the beginning of the four logical time slots, UE1 sends a data packet to UE2, UE1 and UE2 start SL DRX/DTX Inactivity Timer, and start SL DRX/DTX Retransmission Timer at the same time. The activation time of UE1 and UE2 is 10ms.

In an optional implementation manner, when the timer corresponding to the direct communication is started, UE1 and UE2 enter the activation state of monitoring the direct link SL control channel, if within the initial duration of the timer, the resources in the resource pool If the SL available resources are less than the configured minimum SL available resources, when the timer expires, UE1 and UE2 will not enter the inactive state, until the SL available resources in the resource pool are equal to the configured minimum SL available resources, UE1 and UE2 will enter the inactive state state.

In the embodiment of the present application, it is not only applicable to the above-mentioned situation where UE1 and UE2 perform SL unicast communication, but also applies to the situation where UE1 and UE2 perform SL multicast and SL broadcast.

Based on the same inventive concept, an embodiment of the present application provides a terminal device. As shown in FIG. 7, the terminal device includes:

The determining unit 701 is configured to determine whether the available resources of the direct link SL in the resource pool meet the minimum SL available resource requirement according to the initial duration of the timer related to the direct communication;

An extension unit 702, configured to extend the duration of the timer if the SL available resources do not meet the minimum SL available resource requirement, so that the SL available resources within the time span from starting the timer to the extended duration are Satisfy the minimum SL available resource requirement;

The enabling unit 703 is configured to enable the timer, so that the terminal is in an active state before the timer expires.

In an optional embodiment, the terminal being in an active state before the timer expires refers to: the terminal monitors the SL control channel on the SL available resources before the timer expires, or the terminal Send data on SL available resources before timeout.

In an optional embodiment, the SL available resource meeting the minimum SL available resource requirement means that the SL available resource is greater than or equal to the minimum SL available resource.

SL DRX/DTX duration timer;

SL DRX/DTX inactivity timer;

SL DRX/DTX retransmission timer;

SL DRX/DTX minimum available resource timer.

SL logical slot number;

Number of SL subchannels;

Number of SL physical resource blocks.

Based on the same technical concept, as shown in FIG. 8 , it is a schematic structural diagram of a communication terminal provided in an embodiment of the present application, and the communication terminal includes: at least one processor 801; a transceiver connected to the at least one processor 801 in communication 803; and a memory 802 communicatively connected to the at least one processor 801; and a bus interface 804 providing an interface; wherein, the transceiver 803 performs data reception and transmission under the control of the processor 801; the memory 802 stores instructions that can be executed by the at least one processor 801, and the instructions are executed by the at least one processor 801, so that the at least one processor 801 can perform any communication implemented in the above-mentioned embodiments method.

The processor 801 is responsible for managing the bus architecture and general processing, and the memory 802 can store data used by the processor 801 when performing operations. The transceiver 803 is used to receive and transmit data under the control of the processor 801 .

The bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by the processor 801 and various circuits of the memory represented by the memory 802 are linked together. The bus architecture can also link together various other circuits such as peripherals, voltage regulators, and power management circuits, etc., which are well known in the art and therefore will not be further described herein. Bus interface 804 provides the interface. The processor 801 is responsible for managing the bus architecture and general processing, and the memory 802 can store data used by the processor 801 when performing operations.

The process disclosed in the embodiment of the present application may be applied to the processor 801 or implemented by the processor 801 . In the implementation process, each step of the signal processing flow may be completed by an integrated logic circuit of hardware in the processor 801 or instructions in the form of software. The processor 801 may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and may implement or execute the The disclosed methods, steps and logical block diagrams. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the methods disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor. The software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register. The storage medium is located in the memory 802, and the processor 801 reads the information in the memory 802, and completes the steps of the signal processing process in combination with its hardware.

Specifically, the processor 801 is configured to read the computer program in the memory 802, and when the processor 801 executes the computer program, realize:

SL DRX/DTX duration timer;

SL DRX/DTX inactivity timer;

SL DRX/DTX retransmission timer;

SL DRX/DTX minimum available resource timer.

SL logical slot number;

Number of SL subchannels;

Number of SL physical resource blocks.

Those skilled in the art should understand that the embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the present application. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

Obviously, those skilled in the art can make various changes and modifications to the application without departing from the spirit and scope of the application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims

A communication method, characterized in that the method comprises:

According to the initial duration of the timer related to direct communication, determine whether the SL available resources of the direct link in the resource pool meet the minimum SL available resource requirement;

If the SL available resource does not meet the minimum SL available resource requirement, extend the duration of the timer, so that the SL available resource within the time span from starting the timer to the extended duration meets the minimum SL available resource resource requirements;

The timer is started, so that the terminal is in an active state before the timer expires.
The method according to claim 1, wherein the terminal being in an active state before the timer expires is: the terminal monitors the SL control channel on the SL available resources before the timer expires, or the The terminal sends data on the available resources of the SL before the timer expires.
The method according to claim 1, wherein the SL available resource meets the requirement of the minimum SL available resource, and the SL available resource is greater than or equal to the minimum SL available resource.
The method according to claim 1, wherein the timer is used to identify that the SL discontinuous reception DRX/discontinuous transmission DTX is in an active state; the timer includes at least one of the following:

SL DRX/DTX duration timer;

SL DRX/DTX inactivity timer;

SL DRX/DTX retransmission timer;

SL DRX/DTX minimum available resource timer.
The method according to claim 4, wherein the SL DRX/DTX minimum available resource timer is related to the SL DRX/DTX duration timer, the SL DRX/DTX inactivity timer, and the SL DRX/DTX retransmission timing At least one of the timers in the timer starts at the same time.
The method according to claim 5, wherein the SL DRX/DTX minimum available resource timer is related to the SL DRX/DTX duration timer or the SL DRX/DTX inactivity timer or the SL DRX/DTX retransmission timing When both timers are started at the same time, the SL DRX/DTX minimum available resource timer duration can be based on the same or different minimum SL available resource as other timers started at the same time.
The method according to any one of claims 1-6, wherein the minimum SL available resource is configured by the base station for the terminal through dedicated signaling, broadcast or pre-configuration; or, the minimum SL available resource is If configured by the sending terminal, the sending terminal sends the configured minimum SL available resources to the receiving terminal through SL control plane signaling, SL media access control unit MAC CE or direct link control information SCI.
The method according to any one of claims 1-6, wherein the SL available resources include at least one of the following:

SL logical slot number;

Number of SL subchannels;

Number of SL physical resource blocks.
A communication device, characterized in that the device includes:

The determination unit is configured to determine whether the available resources of the direct link SL in the resource pool meet the minimum SL available resource requirement according to the initial duration of the timer related to the direct communication;

An extension unit, configured to extend the duration of the timer if the SL available resources do not meet the minimum SL available resource requirement, so that the SL available resources in the time span from starting the timer to the extended duration meet said minimum SL available resource requirement;

The enabling unit is configured to enable the timer, so that the terminal is in an active state before the timer expires.
A communication terminal, characterized in that the communication terminal includes: at least one processor; a transceiver connected in communication with the at least one processor; and a memory connected in communication with the at least one processor; wherein the The transceiver is used to receive and send data under the control of the processor; the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least A processor can perform the following steps:

According to the initial duration of the timer related to direct communication, determine whether the SL available resources of the direct link in the resource pool meet the minimum SL available resource requirement;

If the SL available resource does not meet the minimum SL available resource requirement, extend the duration of the timer, so that the SL available resource within the time span from starting the timer to the extended duration meets the minimum SL available resource resource requirements;

The timer is started, so that the terminal is in an active state before the timer expires.
The terminal according to claim 10, wherein the terminal being in an active state before the timer expires is: the terminal monitors the SL control channel on the SL available resources before the timer expires, or, the The terminal sends data on the available resources of the SL before the timer expires.
The terminal according to claim 10, wherein the SL available resource meets the requirement of the minimum SL available resource, and the SL available resource is greater than or equal to the minimum SL available resource.
The terminal according to claim 10, wherein the timer is used to identify that the SL discontinuous reception DRX/discontinuous transmission DTX is in an active state; the timer includes at least one of the following:

SL DRX/DTX duration timer;

SL DRX/DTX inactivity timer;

SL DRX/DTX retransmission timer;

SL DRX/DTX minimum available resource timer.
The terminal according to claim 13, wherein the SL DRX/DTX minimum available resource timer is related to the SL DRX/DTX duration timer, the SL DRX/DTX inactivity timer, and the SL DRX/DTX retransmission timing At least one of the timers in the timer starts at the same time.
The terminal according to claim 14, wherein the SL DRX/DTX minimum available resource timer is related to the SL DRX/DTX duration timer or the SL DRX/DTX inactivity timer or the SL DRX/DTX retransmission timing When both timers are started at the same time, the SL DRX/DTX minimum available resource timer duration can be based on the same or different minimum SL available resource as other timers started at the same time.
The terminal according to any one of claims 10-15, wherein the minimum available SL resource is configured by the base station for the terminal through dedicated signaling, broadcast or pre-configuration; or, the minimum available SL resource is If configured by the sending terminal, the sending terminal sends the configured minimum SL available resources to the receiving terminal through SL control plane signaling, SL media access control unit MAC CE or direct link control information SCI.
The terminal according to any one of claims 10-15, wherein the SL available resources include at least one of the following:

SL logical slot number;

Number of SL subchannels;

Number of SL physical resource blocks.
A computer-readable storage medium, wherein the storage medium stores computer instructions, and when the computer instructions are executed by a processor, the method according to any one of claims 1 to 8 is implemented.