WO2021051886A1

WO2021051886A1 - Interface state maintenance method and apparatus, device and computer-readable storage medium

Info

Publication number: WO2021051886A1
Application number: PCT/CN2020/093979
Authority: WO
Inventors: 赵亚利; 王达
Original assignee: 大唐移动通信设备有限公司
Priority date: 2019-09-20
Filing date: 2020-06-02
Publication date: 2021-03-25
Also published as: CN112543461B; CN112543461A

Abstract

Disclosed are an interface state maintenance method, apparatus, device and a computer-readable storage medium. The present invention relates to the technical field of communications to ensure the QoS of a direct communication interface service. The method comprises maintaining the RRC state of the terminal on a Uu interface according to the following information: the data transmission state of the terminal on the Uu interface and the data transmission state of the terminal on a direct communication interface.

Description

Interface state maintenance method, device, equipment and computer readable storage medium

Cross-references to related applications

This application claims the priority of Chinese Patent Application No. 201910892042.3 filed in China on September 20, 2019, the entire content of which is incorporated herein by reference.

Technical field

The present disclosure relates to the field of communication technology, and in particular to an interface state maintenance method, device, equipment and computer-readable storage medium.

Background technique

For the 5G wireless communication system, the Uu interface currently introduces the process of monitoring the data transmission status, and according to the data monitoring situation, in the case that the Uu interface has no data transmission for a long time, the user equipment (User Equipment, UE) is allowed to be controlled by the radio resource ( Radio Resource Control (RRC) connected state is transformed into RRC idle state.

After the introduction of direct communication, if the UE uses the resource allocation mode scheduled by the network on the direct communication interface or has data transmission requirements, but because the UE has no data transmission requirements on the Uu interface, according to the relevant scheme, the UE is allowed to switch from the RRC connection state to RRC idle The direct impact is that the direct communication interface can no longer use the resources scheduled by the network, which affects the quality of service (QoS) of the direct communication interface service.

Summary of the invention

The embodiments of the present disclosure provide an interface state maintenance method, device, equipment, and computer-readable storage medium, which can prevent the terminal from entering the wireless resource control idle state on the Uu interface when the terminal's direct communication interface has service transmission requirements, thereby better guaranteeing QoS requirements for direct communication interfaces.

In the first aspect, the embodiments of the present disclosure provide an interface state maintenance method, which is applied to a terminal, and includes:

According to the following information, maintain the RRC state of the terminal on the Uu interface:

The data transmission state of the terminal on the Uu interface, and the data transmission state of the terminal on the direct communication interface.

Wherein, the data transmission state of the terminal on the direct communication interface includes any one of the following:

Sending and/or receiving data of the terminal on the direct communication interface;

The resource allocation mode of the direct communication interface;

Wherein, the data of the direct communication interface includes user plane data and/or control plane data.

Wherein, in the case that the data transmission status of the terminal on the direct communication interface includes the sending and/or receiving of the data of the terminal on the direct communication interface, the radio resource control RRC status of the maintenance terminal on the Uu interface includes:

Maintaining a first timer, and when the first timer times out, changing the RRC state of the terminal on the Uu interface from the RRC connected state to the RRC idle state or the RRC inactive state;

Wherein, the maintenance of the first timer refers to starting or restarting the first timer when at least one of the following conditions is met:

The Medium Access Control (MAC) entity of the Uu interface receives the MAC service data unit (Service Data Unit, SDU) from the target logical channel of the Uu interface;

The MAC entity of the Uu interface sends a MAC SDU for the target logical channel of the Uu interface;

The MAC entity of the direct communication interface receives the MAC SDU from the target logical channel of the direct communication interface;

The MAC entity of the direct communication interface sends a MAC SDU for the target logical channel of the direct communication interface.

Maintain the second timer and the third timer respectively, and in the case that both the second timer and the third timer expire, change the RRC state of the terminal on the Uu interface from the RRC connected state to RRC idle state or RRC inactive state;

Wherein, maintaining the second timer refers to starting or restarting the second timer when at least one of the following conditions is met:

The MAC entity of the Uu interface receives the MAC SDU from the target logical channel of the Uu interface;

Wherein, maintaining the third timer refers to starting or restarting the third timer when at least one of the following conditions is met:

Maintaining a second timer, and maintaining the RRC state of the terminal on the Uu interface in the RRC connected state when the second timer times out and the direct communication interface has data transmission and/or reception requirements; When the second timer expires and the direct communication interface has no data transmission and/or reception requirements, the RRC state of the terminal on the Uu interface is changed from the RRC connected state to the RRC idle state or the RRC non-RRC state. Active state

Wherein, the maintenance of the second timer refers to starting or restarting the second timer when at least one of the following conditions is met:

The MAC entity of the Uu interface sends the MAC SDU for the target logical channel of the Uu interface.

Maintain a second timer, and restart the second timer if the direct communication interface meets the following conditions at the time of the expiration of the second timer or in the first time period before the second timer expires : The direct communication interface has data sending and/or receiving requirements;

In the case where the second timer expires, changing the RRC state of the terminal on the Uu interface from the RRC connected state to the RRC idle state or the RRC inactive state;

Maintain a second timer. At the timeout of the second timer or in the first time period before the second timer expires, if the target downlink data sent by the network side device is received, restart the second timer. Timer

Wherein, the target downlink data is sent by the network-side device when it is determined that the Uu interface has no data sending and/or receiving requirements but the direct communication interface has data sending and/or receiving requirements.

Maintain a second timer, and send target uplink data or target uplink control information to the network side device at the time of the expiration of the second timer or in the first time period before the expiration of the second timer, so as to restart all The second timer;

Wherein, the target uplink data or target uplink control information is sent by the terminal when it is determined that the Uu interface has no data sending and/or receiving demand but the direct communication interface has data sending and/or receiving demand.

Wherein, when the data transmission state of the terminal on the direct communication interface includes the resource allocation mode of the direct communication interface, the radio resource control RRC state of the maintenance terminal on the Uu interface includes:

Maintaining a second timer, when the second timer expires and the direct communication interface uses the resource allocation mode scheduled by the network or at least one radio bearer on the direct communication interface uses the resource allocation mode scheduled by the network, Maintaining the RRC state of the terminal on the Uu interface in the RRC connected state;

When the second timer expires and the direct communication interface does not use the network-scheduled resource allocation mode or any radio bearer on the direct communication interface does not use the network-scheduled resource allocation mode, the The RRC state of the terminal on the Uu interface is changed from the RRC connected state to the RRC idle state or the RRC inactive state;

Maintain a second timer, and restart the second timer if the direct communication interface meets the following conditions at the time of the expiration of the second timer or in the first time period before the second timer expires : The direct communication interface uses a network-scheduled resource allocation mode or at least one radio bearer on the direct communication interface uses a network-scheduled resource allocation mode;

Maintain a second timer. At the timeout of the second timer or in the first time period before the second timer expires, if the target downlink data sent by the network side device is received, restart the second timer. Timer; wherein, the target downlink data is when the network side device determines that the Uu interface has no data transmission and/or reception requirements and the direct communication interface uses the resource allocation mode of network scheduling or the direct communication interface Is sent when at least one radio bearer uses a resource allocation mode scheduled by the network;

The media access control MAC entity of the Uu interface receives the MAC SDU from the target logical channel of the Uu interface;

Sending target uplink data or target uplink control information to the network side device at the timeout moment of the second timer or in the first time period before the second timer expires, so as to restart the second timer; Wherein, the target uplink data or target uplink control information is when the terminal determines that the Uu interface has no data transmission and/or reception requirements and the direct communication interface uses a network-scheduled resource allocation mode or the direct communication interface Is sent when at least one radio bearer uses a resource allocation mode scheduled by the network;

Wherein, the Uu interface target logical channel includes one or more of the following:

Uu interface dedicated service channel; Uu interface dedicated control channel; Uu interface public control channel;

The direct communication interface target logical channel includes one or more of the following:

Direct communication interface service channel; direct communication interface interface broadcast control channel; direct communication interface interface control channel.

Wherein, the target downlink data includes: an empty MAC SDU or an empty MAC protocol data unit (Protocol Data Unit, PDU).

The target uplink data includes: an empty MAC SDU or an empty MAC PDU; the target uplink control information includes an empty Buffer Status Report (BSR) MAC control element (CE).

Wherein, the method further includes:

When the direct communication interface has a demand for data sending and/or receiving, sending instruction information to the network side device.

In the second aspect, embodiments of the present disclosure provide an interface state maintenance method, which is applied to a network side device, and includes:

Receiving terminal's instruction information;

According to the instruction information, it is determined whether the terminal has a data transmission and/or reception requirement on the direct communication interface.

Wherein, the method further includes:

Maintaining a second timer, sending target downlink data to the terminal at the timeout moment of the second timer or in the first time period before the second timer expires, and restarting the second timer;

Wherein, the target downlink data is when the network side device determines that the Uu interface has no data sending and/or receiving requirements, but according to the indication information, it is determined that the terminal has data sending and/or receiving requirements on the direct communication interface. Sent under the circumstances.

Wherein, the target downlink data includes: empty MAC SDU or empty MAC PDU.

In a third aspect, embodiments of the present disclosure provide an interface state maintenance device, which is applied to a terminal, and includes:

The processing module is used to maintain the radio resource control RRC state of the terminal on the Uu interface according to the following information:

The resource allocation mode of the direct communication interface;

In a fourth aspect, embodiments of the present disclosure provide an interface state maintenance device, which is applied to a network side device, and includes:

The receiving module is used to receive the indication information of the terminal;

The determining module is configured to determine, according to the instruction information, whether the terminal has a data transmission and/or reception requirement on the direct communication interface.

Wherein, the device further includes:

The processing module is configured to maintain a second timer, and send target downlink data to the terminal at the timeout moment of the second timer or in the first time period before the second timer expires, and restart the Second timer

Wherein, the target downlink data is when the network side device determines that the Uu interface has no data transmission and/or reception requirements, but according to the indication information, it determines that the terminal has data transmission and/or reception requirements on the direct communication interface. Sent under the circumstances.

In a fifth aspect, the embodiments of the present disclosure provide an interface state maintenance device, which is applied to a terminal, and includes: a transceiver, a memory, a processor, and a program stored on the memory and running on the processor; The processor is used to read the program in the memory and execute the following process:

According to the following information, the maintenance terminal's radio resource control RRC state on the Uu interface:

The resource allocation mode of the direct communication interface;

Wherein, in the case where the data transmission status of the terminal on the direct communication interface includes the sending and/or receiving of data on the direct communication interface by the terminal, the processor is also used to read the program in the memory and execute the following process:

Wherein, maintaining the first timer refers to starting or restarting the first timer when at least one of the following conditions is met:

Wherein, in the case that the data transmission state of the direct communication interface of the terminal includes the resource allocation mode of the direct communication interface, the processor is further configured to read the program in the memory and execute the following process:

Wherein, the maintaining the second timer refers to starting or restarting the second timer when at least one of the following conditions is met:

In a sixth aspect, the embodiments of the present disclosure provide an interface state maintenance device, which is applied to a network side device, including: a transceiver, a memory, a processor, and a program stored on the memory and running on the processor The processor is used to read the program in the memory and execute the following process:

Receiving terminal's instruction information;

Wherein, the processor is also used to read the program in the memory and execute the following process:

In a seventh aspect, the embodiments of the present disclosure provide a computer-readable storage medium for storing a program that, when executed by a processor, implements the steps in the method described in the first aspect; or, the program is The processor implements the steps in the method described in the second aspect when executed.

In the embodiment of the present disclosure, the maintenance of the RRC status of the Uu interface takes into account the data transmission status of the terminal on the direct communication interface. Therefore, the solution of the embodiment of the present disclosure can avoid the terminal when the direct communication interface of the terminal has service transmission requirements. Enter the wireless resource control idle state on the Uu interface, so as to better ensure the QoS requirements of the direct communication interface.

Description of the drawings

In order to explain the technical solutions of the embodiments of the present disclosure more clearly, the following will briefly introduce the accompanying drawings used in the description of the embodiments of the present disclosure. Obviously, the accompanying drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained from these drawings without creative labor.

FIG. 1 is one of the flowcharts of the interface state maintenance method provided by the embodiment of the present disclosure;

2 to 11 are schematic diagrams of the implementation process of the embodiments of the present disclosure;

FIG. 12 is the second flowchart of the interface state maintenance method provided by the embodiment of the present disclosure;

FIG. 13 is one of the structural diagrams of the interface state maintenance device provided by the embodiment of the present disclosure;

14 is the second structural diagram of the interface state maintenance device provided by the embodiment of the present disclosure;

FIG. 15 is one of the structural diagrams of the interface state maintenance device provided by an embodiment of the present disclosure;

Fig. 16 is the second structural diagram of the interface state maintenance device provided by an embodiment of the present disclosure.

detailed description

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present disclosure.

Referring to Fig. 1, Fig. 1 is a flowchart of an interface state maintenance method provided by an embodiment of the present disclosure. As shown in Fig. 1, it includes the following steps:

Step 101: Maintain the RRC state of the terminal on the Uu interface according to the following information:

The terminal sends and/or receives data on the direct communication interface; the resource allocation mode of the direct communication interface; wherein, the data of the direct communication interface includes user plane data and/or control plane data.

The following describes how to maintain the RRC status of the terminal on the Uu interface in combination with the data transmission status of different terminals on the direct communication interface.

1. The data transmission status of the terminal on the direct communication interface includes the sending and/or receiving of data by the terminal on the direct communication interface.

In this case, there are several ways to deal with it:

(1) Maintain the first timer, and in the case where the first timer expires, convert the RRC state of the terminal on the Uu interface from the RRC connected state to the RRC idle state or the RRC inactive state. That is, in this manner, only one first timer needs to be maintained, and the maintenance of the first timer needs to consider the data reception or transmission of the Uu interface and the direct communication interface at the same time.

(2) Maintain the second timer and the third timer respectively, and in the case that both the second timer and the third timer expire, change the RRC state of the terminal on the Uu interface from RRC The connected state is changed to the RRC idle state or the RRC inactive state. That is, in this manner, one timer is maintained for the direct communication interface and the Uu interface respectively, and the maintenance of each timer only considers the data reception or transmission of its corresponding communication interface. For example, the second timer is maintained for the Uu interface, and the third timer is maintained for the direct communication interface.

(3) Maintain a second timer, and maintain the RRC state of the terminal on the Uu interface when the second timer expires and the direct communication interface has data transmission and/or reception requirements RRC connected state; in the case where the second timer expires and the direct communication interface has no data transmission and/or reception requirements, the RRC state of the terminal on the Uu interface is changed from the RRC connected state to the RRC idle State or RRC inactive state.

That is, in this manner, the second timer is maintained for the data transmission state of the Uu interface. In this case, if the second timer expires, but the direct communication interface has a data receiving/sending request, then the RRC state change is not allowed, but the RRC connected state is maintained. Only when the timer expires and the direct communication interface has no data receiving/sending requirements, the UE will switch from the RRC connected state to the RRC idle or RRC inactive state.

(4) Maintain a second timer. At the timeout moment of the second timer or within the first time period before the second timer expires, if the direct communication interface meets the following conditions, restart the Second timer: The direct communication interface has a data sending and/or receiving demand.

That is, in this manner, the second timer is maintained for the data transmission state of the Uu interface. If the second timer expires, but the direct communication interface has a data receiving/sending request, the UE restarts the second timer. Only when the timer expires, the UE will transition from the RRC connected state to the RRC idle or RRC inactive state.

(5) Maintain the second timer. At the timeout of the second timer or in the first time period before the second timer expires, if the target downlink data sent by the network side device is received, restart The second timer; in the case where the second timer expires, the RRC state of the terminal on the Uu interface is converted from the RRC connected state to the RRC idle state or the RRC inactive state.

That is, in this manner, the second timer is maintained for the data transmission state of the Uu interface. Before the timeout of the second timer or before the timeout, if the network side device predicts that the Uu interface has no data receiving/sending demand, but the direct communication interface has data receiving/sending demand, the network side device sends specific downlink data to the UE on the Uu interface (Such as an empty MAC SDU), prompting the UE to restart the second timer. Only when the second timer expires, the UE is allowed to change from the RRC connected state to the RRC idle state or the RRC inactive state.

(6) Maintain a second timer, and send target uplink data or target uplink control information to the network side device at the timeout of the second timer or in the first time period before the second timer expires , To restart the second timer; when the second timer expires, the RRC state of the terminal on the Uu interface is changed from the RRC connected state to the RRC idle state or the RRC inactive state.

That is, in this manner, the second timer is maintained for the data transmission state of the Uu interface. Before the timeout of the second timer or before the timeout, if the UE predicts that the Uu interface has no data receiving/sending requirements, but the direct communication interface has data receiving/sending requirements, the UE sends specific uplink data or control to the network side device on the Uu interface Information, the UE is prompted to restart the second timer through uplink transmission. Only when the second timer expires, is it allowed to change from the RRC connected state to the RRC idle state or the RRC inactive state.

2. The data transmission state of the terminal on the direct communication interface includes the resource allocation mode of the direct communication interface.

In this case, there are several ways to deal with it:

(1) Maintain a second timer, when the second timer expires and the direct communication interface uses the network-scheduled resource allocation mode or at least one radio bearer on the direct communication interface uses the network-scheduled resource allocation mode In the case of maintaining the RRC state of the terminal on the Uu interface in the RRC connection state; when the second timer expires and the direct communication interface does not use the resource allocation mode of network scheduling or the direct communication interface When none of the above radio bearers use the resource allocation mode scheduled by the network, the RRC state of the terminal on the Uu interface is changed from the RRC connected state to the RRC idle state or the RRC inactive state.

That is, in this manner, the second timer is maintained for the data transmission state of the Uu interface. If the second timer expires, but the direct communication interface uses the network-scheduled resource allocation mode or at least one radio bearer on the direct communication interface uses the network-scheduled resource allocation mode, then the RRC state change is not allowed, but the RRC connection state is maintained . Only when the second timer expires, the direct communication interface does not use the network-scheduled resource allocation mode or any bearer on the direct communication interface does not use the network-scheduled resource allocation mode, is it allowed to change from the RRC connection state to the RRC idle state Or RRC is inactive.

(2) Maintain a second timer. At the timeout of the second timer or in the first time period before the second timer expires, if the direct communication interface meets the following conditions, restart the Second timer: the direct communication interface uses the resource allocation mode scheduled by the network or at least one radio bearer on the direct communication interface uses the resource allocation mode scheduled by the network; if the second timer expires, set The RRC state of the terminal on the Uu interface is changed from the RRC connected state to the RRC idle state or the RRC inactive state.

That is, in this manner, the second timer is maintained for the data transmission state of the Uu interface. If the second timer expires, but the direct communication interface uses the resource allocation mode scheduled by the network or at least one radio bearer on the current direct communication interface of the UE uses the resource allocation mode scheduled by the network, the UE restarts the second timer. Only when the timer expires, is it allowed to change from the RRC connected state to the RRC idle state or the RRC inactive state.

(4) Maintain the second timer. At the timeout of the second timer or in the first time period before the second timer expires, if the target downlink data sent by the network side device is received, restart The second timer; wherein, the target downlink data is when the network-side device determines that the Uu interface has no data transmission and/or reception requirements and the direct communication interface uses network scheduling resource allocation mode or the Is sent when at least one radio bearer on the direct communication interface uses the resource allocation mode scheduled by the network; when the second timer expires, the RRC state of the terminal on the Uu interface is changed from the RRC connected state Transition to RRC idle state or RRC inactive state.

That is, in this manner, the second timer is maintained for the data transmission state of the Uu interface. Before the timeout of the second timer or before the timeout, if the network-side device predicts that the Uu interface has no data receiving/sending requirements but the direct communication interface uses the network scheduling resource allocation mode or at least one radio bearer on the direct communication interface uses network scheduling resources In the allocation mode, the network side device sends specific downlink data (such as an empty MAC SDU) to the UE on the Uu interface to prompt the UE to restart the second timer. Only when the second timer expires, is it allowed to change from the RRC connected state to the RRC idle state or the RRC inactive state.

(4) At the timeout of the second timer or in the first time period before the second timer expires, send target uplink data or target uplink control information to the network side device to restart the second timer Two timers; wherein the target uplink data or target uplink control information is when the terminal determines that the Uu interface has no data transmission and/or reception requirements and the direct communication interface uses a network-scheduled resource allocation mode or the Is sent when at least one radio bearer on the direct communication interface uses the resource allocation mode scheduled by the network; when the second timer expires, the RRC state of the terminal on the Uu interface is changed from the RRC connected state Transition to RRC idle state or RRC inactive state.

That is, in this manner, the second timer is maintained for the data transmission state of the Uu interface. Before the second timer expires, if the UE predicts that the Uu interface has no data reception/transmission requirements but the direct communication interface uses the network-scheduled resource allocation mode or at least one radio bearer on the direct communication interface uses the network-scheduled resource allocation mode, the UE is The Uu interface sends specific uplink data or control information to the network side device, and the UE is prompted to restart the second timer through uplink transmission. Only when the second timer expires, is it allowed to change from the RRC connected state to the RRC idle state or the RRC inactive state.

In the above embodiment, the Uu interface target logical channel includes one or more of the following: Uu interface dedicated service channel; Uu interface dedicated control channel; Uu interface common control channel; the direct communication interface target logical channel includes the following One or more: direct communication interface service channel; direct communication interface interface broadcast control channel; direct communication interface interface control channel.

In the above embodiment, the target downlink data includes: an empty MAC SDU or an empty MAC PDU. The target uplink data includes: an empty MAC SDU or an empty MAC PDU; the target uplink control information includes an empty BSR MAC CE.

In the above embodiments, the length of the first time period can be set arbitrarily.

In the related art, a data inactivity timer (DataInactivityTimer) is defined in the process of monitoring the Uu interface. When the MAC entity of the UE Uu interface receives a dedicated traffic channel (DTCH) logical channel and/or a dedicated control channel (DCCH) logical channel and/or a common control channel (CCCH) After the MAC SDU of the logical channel or the MAC SDU for the DTCH logical channel and/or the DCCH logical channel is sent, the DataInactivityTimer is started/restarted. If the DataInactivityTimer expires, the instruction information is sent to the higher layer (RRC layer). The higher layer of the UE (RRC layer) will release the UE RRC connection and enter the RRC idle state after receiving the indication information.

According to the current agreement, the data monitoring of the Uu interface only monitors the data receiving/sending situation of the Uu interface, and does not consider the data receiving/sending situation of the direct communication interface. Therefore, the following situations may occur: the direct communication interface requires the UE to maintain RRC connection state, but because the Uu interface has no data transmission requirements, the Uu interface automatically switches to the RRC idle state. Therefore, this will affect the QoS satisfaction of the direct communication interface service, thereby directly affecting the user experience of the direct communication service. In order to meet the QoS requirements of the direct communication service, the implementation of the present disclosure proposes a method for maintaining the interface state, that is, the terminal maintains its RRC state on the Uu interface according to its data transmission state on the direct communication interface.

Hereinafter, the implementation process of the embodiments of the present disclosure will be described in detail in combination with different embodiments.

In an embodiment, the UE maintains only one timer, and the maintenance of the timer needs to consider the data receiving/sending situation of the Uu interface and the direct communication interface at the same time. With reference to Figure 2, the specific timer maintenance method is as follows:

At time T1, when one or a combination of the following conditions is met, the UE starts the timer:

(1) The MAC entity of the Uu interface of the UE receives a specific logical channel from the Uu interface (including but not limited to Uu interface dedicated traffic channel (Dedicated Traffic Channel, DTCH)/Uu interface dedicated control channel (Dedicated Control Channel, DCCH)/Uu The MAC SDU of the Common Control Channel (CCCH) of the interface;

(2) The MAC entity of the Uu interface of the UE sends the MAC SDU for the specific logical channel of the Uu interface (including but not limited to the Uu interface dedicated service channel/Uu interface dedicated control channel (DCCH));

(3) The MAC entity of the direct communication interface of the UE receives a specific logical channel from the direct communication interface (including but not limited to the Sidelink Traffic Channel (STCH) of the direct communication interface)/Sidelink Broadcast Control Channel (Sidelink Broadcast Control Channel) of the direct communication interface , SBCCH)/Direct communication interface interface control channel (Sidelink Control Channel, SCCH) MAC SDU;

(4) The MAC entity of the direct communication interface of the UE sends a specific logical channel for the direct communication interface (including but not limited to the direct communication interface service channel (STCH) / direct communication interface interface broadcast control channel (SBCCH) / direct communication interface interface control Channel (SCCH)) MAC SDU.

At time T2, when one or a combination of the following conditions is met, the UE restarts the timer:

(1) The MAC entity of the Uu interface of the UE receives a specific logical channel from the Uu interface (including but not limited to Uu interface dedicated traffic channel (DTCH)/Uu interface dedicated control channel (DCCH)/Uu interface common control channel (CCCH)) The MAC SDU;

(2) The MAC entity of the Uu interface of the UE sends a MAC SDU for specific logical channels of the Uu interface (including but not limited to Uu interface dedicated traffic channel (DTCH)/Uu interface dedicated control channel (DCCH));

(3) The MAC entity of the direct communication interface of the UE receives a specific logical channel from the direct communication interface (including but not limited to the direct communication interface service channel (STCH) / direct communication interface interface broadcast control channel (SBCCH) / direct communication interface interface control MAC SDU of the channel (SCCH);

At T3, the timer expires. Once the timer expires, the RRC state of the UE on the Uu interface changes from the RRC connected state to the RRC idle or RRC inactive state.

In one embodiment, the UE maintains a timer for the direct communication interface and the Uu interface respectively, and the maintenance of each timer only considers the data reception/transmission status of its corresponding communication interface. That is, the maintenance of the timer of the direct communication interface needs to consider the data reception/transmission situation of the direct communication reception, and the maintenance of the Uu interface timer needs to consider the data reception/transmission situation of the Uu interface. With reference to Figure 3, the specific timer maintenance method is as follows:

The timer maintenance process for the direct communication interface is as follows:

At time T1, when one or a combination of the following conditions is met, the UE starts the timer of the direct communication interface:

(1) The MAC entity of the direct communication interface of the UE receives a specific logical channel from the direct communication interface (including but not limited to the direct communication interface service channel (STCH) / direct communication interface interface broadcast control channel (SBCCH) / direct communication interface interface control MAC SDU of the channel (SCCH);

(2) The MAC entity of the direct communication interface of the UE sends a specific logical channel for the direct communication interface (including but not limited to the direct communication interface service channel (STCH) / direct communication interface interface broadcast control channel (SBCCH) / direct communication interface interface control Channel (SCCH)) MAC SDU.

At time T3, when one or a combination of the following conditions is met, the UE restarts the timer of the direct communication interface:

The timer maintenance process for the Uu interface is as follows:

At time T2, when one or a combination of the following conditions is met, the UE starts the timer of the Uu interface:

At time T4, when one or a combination of the following conditions is met, the UE restarts the timer of the Uu interface:

Time T5/T6: At time T5, the timer of the direct communication interface corresponding to the UE times out; at time T6, the timer of the Uu interface corresponding to the UE times out.

Only when both the direct communication interface timer and the Uu interface timer expire, the RRC state of the UE on the Uu interface will change from the RRC connected state to the RRC idle or RRC inactive state.

In one embodiment, for the Uu interface data transmission status maintenance timer (the specific maintenance mechanism is the same as the current Uu port DataInactivityTimer maintenance mechanism), if the timer expires, but the current direct communication interface of the UE has data receiving/sending requirements, the UE does not Allows RRC state changes to be maintained in the RRC connected state. With reference to Figure 4, the specific timer maintenance method is as follows:

(2) The MAC entity of the Uu interface of the UE sends a MAC SDU for specific logical channels of the Uu interface (including but not limited to Uu interface dedicated traffic channel (DTCH)/Uu interface dedicated control channel (DCCH)).

(2) The MAC entity of the Uu interface of the UE sends the MAC SDU for the specific logical channel of the Uu interface (including but not limited to the Uu interface dedicated traffic channel (DTCH)/Uu interface dedicated control channel (DCCH)).

At time T3, the timer expires.

At time T4, although the timer has timed out at time T3, because the UE has a data receiving/sending request on the current direct communication interface, the UE is not allowed to change the RRC state, but is maintained in the RRC connected state. Until T4, the direct communication interface has no data receiving/sending requirements, and the UE is allowed to transition from the RRC connected state to the RRC idle or RRC inactive state.

In one embodiment, for the Uu interface data transmission status maintenance timer (the specific maintenance mechanism is the same as the current Uu port DataInactivityTimer maintenance mechanism), if the timer expires, but the current direct communication interface of the UE has data receiving/sending requirements, the UE does not Allows RRC state changes to be maintained in the RRC connected state. With reference to Figure 5, the specific timer maintenance method is as follows:

At time T3, the timer expires. However, the UE needs to receive/send data on the direct communication interface, and the UE restarts the timer.

At time T4, the timer expires. At this time, the UE has no data receiving/sending requirements on the direct communication interface, and the UE transitions from the RRC connected state to the RRC idle or RRC inactive state.

In one embodiment, for the Uu interface data transmission status maintenance timer (the specific maintenance mechanism is the same as the current Uu port DataInactivityTimer maintenance mechanism), before the timer expires, if the network device predicts that the Uu interface has no data receiving/sending requirements but the UE If there is a data receiving/sending requirement on the direct communication interface, the network device sends specific downlink data (such as an empty MAC SDU) to the UE on the Uu interface to prompt the UE to restart the timer. Only when the timer expires, is it allowed to change from the RRC connection state to the RRC idle state or the RRC inactive state. With reference to Figure 6, the specific timer maintenance method is as follows:

At T3, before the timer expires, if the network device predicts that the UE has no data transmission requirements on the Uu interface but the UE has data transmission/reception requirements on the direct communication interface, the network device sends specific downlink data (such as empty) to the UE on the Uu interface. MAC SDU), prompting the UE to restart the timer.

At time T4, the timer expires, and the UE transitions from the RRC connected state to the RRC idle or RRC inactive state.

In one embodiment, the timer is maintained for the data transmission state of the Uu interface (the specific maintenance mechanism is the same as the current Uu interface DataInactivityTimer maintenance mechanism). Before the timer expires, if the UE predicts that the UE has no data receiving/sending requirements on the Uu interface, but the UE has data receiving/sending requirements on the direct communication interface, the UE will send specific uplink data to the network on the Uu interface (for example, generate an empty MAC The SDU or empty (empty) buffer status report (Buffer Status Report, BSR) MAC control unit (Channel Element, CE), etc.) prompts the UE to restart the timer. Only when the timer expires, is it allowed to change from the RRC connection state to the RRC idle state or the RRC inactive state. With reference to Figure 7, the specific timer maintenance method is as follows:

At T3, before the timer expires, if the UE predicts that the Uu interface of the UE has no data receiving/sending demand but the UE has a data receiving/sending demand on the direct communication interface, the UE sends uplink data or control information to the network device. For example, if there are uplink resources, an empty MAC SDU or empty BSR MAC CE can be sent. If there is no uplink resource, a scheduling request (Scheduling Request, SR) can be sent. The network device allocates uplink resources for the terminal according to the SR, and uses the uplink resources to transmit empty MAC SDU or empty BSR MAC CE, so that the timer can be restarted.

In one embodiment, for the Uu interface data transmission status maintenance timer (the specific maintenance mechanism is the same as the current Uu port DataInactivityTimer maintenance mechanism), if the timer expires, but the current direct communication interface of the UE uses the network scheduling resource allocation mode or at least the UE At least one radio bearer on the direct communication interface uses the resource allocation mode scheduled by the network, then the UE is not allowed to change the RRC state and remains in the RRC connected state. Only when the timer expires, the UE direct communication interface does not use the resource allocation mode of network scheduling or any bearer on the UE direct communication interface does not use the resource allocation mode of network scheduling, is it allowed to change from the RRC connection state to the RRC idle state Or RRC is inactive. With reference to Figure 8, the specific timer maintenance method is as follows:

At time T3, the timer expires.

At time T4, although the timer has timed out at time T3, since the current direct communication interface of the UE uses the resource allocation mode of network scheduling or at least one radio bearer on the UE direct communication interface uses the resource allocation mode of network scheduling, then The UE is not allowed to change the RRC state and needs to be maintained in the RRC connected state. Until T4, when the UE direct communication interface does not use the resource allocation mode of network scheduling or any bearer on the UE direct communication interface does not use the resource allocation mode of network scheduling, the UE is allowed to transition from the RRC connected state to RRC idle or RRC inactive. status.

In one embodiment, the timer is maintained for the data transmission state of the Uu interface (the specific maintenance mechanism is the same as the current Uu interface DataInactivityTimer maintenance mechanism). If the timer expires, but the current direct communication interface of the UE uses the network-scheduled resource allocation mode or at least one radio bearer on the current direct communication interface of the UE uses the network-scheduled resource allocation mode, the UE restarts the timer; When the timer expires, the RRC connection state is allowed to change to the RRC idle state or the RRC inactive state. With reference to Figure 9, the specific timer maintenance method is as follows:

At time T3, the timer expires. If the timer expires, but the current direct communication interface of the UE uses the network-scheduled resource allocation mode or at least one radio bearer on the current direct communication interface of the UE uses the network-scheduled resource allocation mode, the UE restarts the timer.

In one embodiment, the timer is maintained for the data transmission state of the Uu interface (the specific maintenance mechanism is the same as the current Uu interface DataInactivityTimer maintenance mechanism). Before the timer expires, if the network side device predicts that the UE Uu interface has no data receiving/sending requirements, but the current direct communication interface of the UE uses the resource allocation mode scheduled by the network or at least one radio bearer on the current direct communication interface of the UE uses the resources scheduled by the network In the allocation mode, the network side device sends specific downlink data (such as an empty MAC SDU) to the UE on the Uu interface to prompt the UE to restart the timer. Only when the timer expires, is it allowed to change from the RRC connection state to the RRC idle state or the RRC inactive state. With reference to Figure 10, the specific timer maintenance method is as follows:

At time T3, the timer expires. If the network-side device predicts that the Uu interface of the UE has no data receiving/sending requirements, but the current direct communication interface of the UE uses the resource allocation mode scheduled by the network or at least one radio bearer on the current direct communication interface of the UE uses the resource allocation mode scheduled by the network, Then, the network side device sends specific downlink data (such as an empty MAC SDU) to the UE on the Uu interface to prompt the UE to restart the timer.

In one embodiment, the timer is maintained for the data transmission state of the Uu interface (the specific maintenance mechanism is the same as the current Uu interface DataInactivityTimer maintenance mechanism). Before the timer expires, if the UE predicts that the Uu interface of the UE has no data reception/transmission requirements but the UE uses the resource allocation mode of network scheduling on the direct communication interface or at least one radio bearer on the current direct communication interface of the UE uses the resource allocation mode of network scheduling, Then, on the Uu interface, the UE sends specific uplink data or control information to the network, and the UE is prompted to restart the timer through uplink transmission. Only when the timer expires, is it allowed to change from the RRC connection state to the RRC idle state or the RRC inactive state. With reference to Figure 11, the specific timer maintenance method is as follows:

At T3, before the timer expires, if the UE predicts that the Uu interface of the UE has no data receiving/sending requirements but the UE uses the resource allocation mode of network scheduling on the direct communication interface or at least one radio bearer on the current direct communication interface of the UE uses network scheduling In the resource allocation mode, the UE sends specific uplink data or control information to the network on the Uu interface, and the UE is prompted to restart the timer through uplink transmission. For example, if there are uplink resources, an empty MAC SDU or empty BSR MAC CE can be sent. If there is no uplink resource, an SR can be sent. The network device allocates uplink resources for the terminal according to the SR, and uses the uplink resources to transmit empty MAC SDU or empty BSR MAC CE, so that the timer can be restarted.

It can be seen from the above description that the solution of the embodiments of the present disclosure can prevent the terminal from entering the radio resource control idle state on the Uu interface when the terminal direct communication interface has a service transmission requirement, thereby better ensuring the QoS requirements of the direct communication interface.

Refer to FIG. 12, which is a flowchart of an interface state maintenance method according to an embodiment of the present disclosure. With reference to FIG. 12, the interface state maintenance method of the embodiment of the present disclosure is applied to the network side device, including:

Step 1201: Receive the instruction information of the terminal.

Step 1202: Determine, according to the instruction information, whether the terminal has a data transmission and/or reception requirement on the direct communication interface.

On the basis of the foregoing embodiment, the method further includes:

Wherein, the target downlink data includes: empty MAC SDU or empty MAC PDU.

It can be seen from the above description that the solution of the embodiments of the present disclosure can prevent the terminal from entering the radio resource control idle state on the Uu interface when the direct communication interface of the terminal has service transmission requirements, thereby better ensuring the QoS requirements of the direct communication interface. Improve the user experience of direct communication interface services.

As shown in FIG. 13, it is a schematic diagram of an interface state maintenance device according to an embodiment of the present disclosure, which is applied to a terminal. The interface state maintenance device may include: a processing module 1301, configured to maintain the RRC state of the terminal on the Uu interface according to the following information: the data transmission state of the terminal on the Uu interface, and the data transmission state of the terminal on the direct communication interface .

Wherein, in the case where the data transmission state of the terminal on the direct communication interface includes the sending and/or receiving of data on the direct communication interface by the terminal, the processing module is specifically configured to:

The MAC entity of the Uu interface sends a MAC SDU for the target logical channel of the Uu interface.

Wherein, in the case that the data transmission state of the terminal on the direct communication interface includes the resource allocation mode of the direct communication interface, the processing module is specifically configured to:

Wherein, the Uu interface target logical channel includes one or more of the following: Uu interface dedicated service channel; Uu interface dedicated control channel; Uu interface common control channel; the direct communication interface target logical channel includes one or more of the following : Direct communication interface service channel; direct communication interface interface broadcast control channel; direct communication interface interface control channel.

Wherein, the target downlink data includes: empty MAC SDU or empty MAC PDU.

Wherein, the target uplink data includes: an empty MAC SDU or an empty MAC PDU; the target uplink control information includes an empty BSR MAC CE.

The device provided in the embodiment of the present disclosure can execute the foregoing method embodiment, and its implementation principles and technical effects are similar, and details are not described herein again in this embodiment.

As shown in FIG. 14, it is a schematic diagram of an interface state maintenance apparatus of an embodiment of the present disclosure, which is applied to a network side device. The interface state maintenance device may include: a receiving module 1401, configured to receive indication information from a terminal; and a determining module 1402, configured to determine whether the terminal has data transmission and/or reception on the direct communication interface according to the indication information. demand.

Optionally, the device further includes:

Wherein, the target downlink data includes: empty MAC SDU or empty MAC PDU.

The embodiment of the present disclosure also provides an interface state maintenance device, which is applied to a terminal. As shown in FIG. 15, the interface state maintenance device of the embodiment of the present disclosure includes: a processor 1500, configured to read programs in a memory 1520, and execute the following process:

The transceiver 1510 is used to receive and send data under the control of the processor 1500.

Wherein, in FIG. 15, the bus architecture may include any number of interconnected buses and bridges. Specifically, one or more processors represented by the processor 1500 and various circuits of the memory represented by the memory 1520 are linked together. The bus architecture can also link various other circuits such as peripherals, voltage regulators, power management circuits, etc., which are all known in the art, and therefore, will not be further described herein. The bus interface provides the interface. The transceiver 1510 may be a plurality of elements, including a transmitter and a receiver, and provide a unit for communicating with various other devices on the transmission medium. For different user equipment, the user interface 1530 may also be an interface capable of connecting externally and internally with the required equipment. The connected equipment includes but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.

The processor 1500 is responsible for managing the bus architecture and general processing, and the memory 1520 can store data used by the processor 1500 when performing operations.

The resource allocation mode of the direct communication interface;

The processor 1500 is further configured to read the program and execute the following steps:

Wherein, the target downlink data is sent by the network side device when it is determined that the Uu interface has no data sending and/or receiving demand but the direct communication interface has data sending and/or receiving demand.

Wherein, the target downlink data includes: empty MAC SDU or empty MAC PDU.

The embodiment of the present disclosure also provides an interface state maintenance device, which is applied to a network side device. As shown in FIG. 16, the interface state maintenance device of the embodiment of the present disclosure includes: a processor 1600, configured to read a program in a memory 1620, and execute the following process:

Receiving terminal's instruction information;

The transceiver 1610 is used to receive and send data under the control of the processor 1600.

Wherein, in FIG. 16, the bus architecture may include any number of interconnected buses and bridges. Specifically, one or more processors represented by the processor 1600 and various circuits of the memory represented by the memory 1620 are linked together. The bus architecture can also link various other circuits such as peripherals, voltage regulators, power management circuits, etc., which are all known in the art, and therefore, will not be further described herein. The bus interface provides the interface. The transceiver 1610 may be a plurality of elements, including a transmitter and a transceiver, and provide a unit for communicating with various other devices on a transmission medium. The processor 1600 is responsible for managing the bus architecture and general processing, and the memory 1620 can store data used by the processor 1600 when performing operations.

The processor 1600 is responsible for managing the bus architecture and general processing, and the memory 1620 can store data used by the processor 1600 when performing operations.

The processor 1600 is further configured to read the program and execute the following steps:

Wherein, the target downlink data includes: empty MAC SDU or empty MAC PDU.

The embodiments of the present disclosure also provide a computer-readable storage medium, and a computer program is stored on the computer-readable storage medium. When the computer program is executed by a processor, each process of the above-mentioned interface state maintenance method embodiment is realized, and the same Technical effects, in order to avoid repetition, I will not repeat them here.

In the several embodiments provided in this application, it should be understood that the disclosed method and device can be implemented in other ways. For example, the device embodiments described above are merely illustrative, for example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

In addition, the functional units in the various embodiments of the present disclosure may be integrated into one processing unit, or each unit may be separately physically included, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware, or may be implemented in the form of hardware plus software functional units.

The above-mentioned integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The above-mentioned software function unit is stored in a storage medium, and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device, etc.) to execute part of the steps of the transceiver method described in each embodiment of the present disclosure. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

The above are optional implementations of the present disclosure. It should be pointed out that for those of ordinary skill in the art, without departing from the principles of the present disclosure, several improvements and modifications can be made. These improvements and modifications It should also be regarded as the protection scope of the present disclosure.

Claims

An interface state maintenance method, applied to a terminal, includes:

According to the following information, the maintenance terminal's radio resource control RRC state on the Uu interface:

The data transmission state of the terminal on the Uu interface, and the data transmission state of the terminal on the direct communication interface.
The method according to claim 1, wherein the data transmission status of the terminal on the direct communication interface includes any one of the following:

Sending and/or receiving data of the terminal on the direct communication interface;

The resource allocation mode of the direct communication interface;

Wherein, the data of the direct communication interface includes user plane data and/or control plane data.
The method according to claim 2, wherein, in the case that the data transmission status of the terminal on the direct communication interface includes the sending and/or receiving of data of the terminal on the direct communication interface, the maintenance terminal is on the Uu interface The radio resource control RRC status includes:

Maintaining a first timer, and when the first timer times out, changing the RRC state of the terminal on the Uu interface from the RRC connected state to the RRC idle state or the RRC inactive state;

Wherein, maintaining the first timer refers to starting or restarting the first timer when at least one of the following conditions is met:

The media access control MAC entity of the Uu interface receives the MAC service data unit SDU from the target logical channel of the Uu interface;

The MAC entity of the Uu interface sends a MAC SDU for the target logical channel of the Uu interface;

The MAC entity of the direct communication interface receives the MAC SDU from the target logical channel of the direct communication interface;

The MAC entity of the direct communication interface sends a MAC SDU for the target logical channel of the direct communication interface.
The method according to claim 2, wherein, in the case that the data transmission status of the terminal on the direct communication interface includes the sending and/or receiving of data of the terminal on the direct communication interface, the maintenance terminal is on the Uu interface The radio resource control RRC status includes:

Maintain the second timer and the third timer respectively, and in the case that both the second timer and the third timer expire, change the RRC state of the terminal on the Uu interface from the RRC connected state to RRC idle state or RRC inactive state;

Wherein, maintaining the second timer refers to starting or restarting the second timer when at least one of the following conditions is met:

The MAC entity of the Uu interface receives the MAC SDU from the target logical channel of the Uu interface;

The MAC entity of the Uu interface sends a MAC SDU for the target logical channel of the Uu interface;

Wherein, maintaining the third timer refers to starting or restarting the third timer when at least one of the following conditions is met:

The MAC entity of the direct communication interface receives the MAC SDU from the target logical channel of the direct communication interface;

The MAC entity of the direct communication interface sends a MAC SDU for the target logical channel of the direct communication interface.
The method according to claim 2, wherein, in the case that the data transmission status of the terminal on the direct communication interface includes the sending and/or receiving of data of the terminal on the direct communication interface, the maintenance terminal is on the Uu interface The radio resource control RRC status includes:

Maintaining a second timer, and maintaining the RRC state of the terminal on the Uu interface in the RRC connected state when the second timer times out and the direct communication interface has data transmission and/or reception requirements; When the second timer expires and the direct communication interface has no data transmission and/or reception requirements, the RRC state of the terminal on the Uu interface is changed from the RRC connected state to the RRC idle state or the RRC non-RRC state. Active state

Wherein, the maintenance of the second timer refers to starting or restarting the second timer when at least one of the following conditions is met:

The MAC entity of the Uu interface receives the MAC SDU from the target logical channel of the Uu interface;

The MAC entity of the Uu interface sends the MAC SDU for the target logical channel of the Uu interface.
The method according to claim 2, wherein, in the case that the data transmission status of the terminal on the direct communication interface includes the sending and/or receiving of data of the terminal on the direct communication interface, the maintenance terminal is on the Uu interface The radio resource control RRC status includes:

Maintain a second timer, and restart the second timer if the direct communication interface meets the following conditions at the time of the expiration of the second timer or in the first time period before the second timer expires : The direct communication interface has data sending and/or receiving requirements;

In the case where the second timer expires, changing the RRC state of the terminal on the Uu interface from the RRC connected state to the RRC idle state or the RRC inactive state;

Wherein, the maintenance of the second timer refers to starting or restarting the second timer when at least one of the following conditions is met:

The MAC entity of the Uu interface receives the MAC SDU from the target logical channel of the Uu interface;

The MAC entity of the Uu interface sends the MAC SDU for the target logical channel of the Uu interface.
The method according to claim 2, wherein, in the case that the data transmission status of the terminal on the direct communication interface includes the sending and/or receiving of data of the terminal on the direct communication interface, the maintenance terminal is on the Uu interface The radio resource control RRC status includes:

Maintain a second timer. At the timeout of the second timer or in the first time period before the second timer expires, if the target downlink data sent by the network side device is received, restart the second timer. Timer

In the case where the second timer expires, changing the RRC state of the terminal on the Uu interface from the RRC connected state to the RRC idle state or the RRC inactive state;

Wherein, the maintenance of the second timer refers to starting or restarting the second timer when at least one of the following conditions is met:

The MAC entity of the Uu interface receives the MAC SDU from the target logical channel of the Uu interface;

The MAC entity of the Uu interface sends a MAC SDU for the target logical channel of the Uu interface;

Wherein, the target downlink data is sent by the network-side device when it is determined that the Uu interface has no data sending and/or receiving requirements but the direct communication interface has data sending and/or receiving requirements.
The method according to claim 2, wherein, in the case that the data transmission status of the terminal on the direct communication interface includes the sending and/or receiving of data of the terminal on the direct communication interface, the maintenance terminal is on the Uu interface The radio resource control RRC status includes:

Maintain a second timer, and send target uplink data or target uplink control information to the network side device at the time of the expiration of the second timer or in the first time period before the expiration of the second timer, so as to restart all The second timer;

In the case where the second timer expires, changing the RRC state of the terminal on the Uu interface from the RRC connected state to the RRC idle state or the RRC inactive state;

Wherein, the maintenance of the second timer refers to starting or restarting the second timer when at least one of the following conditions is met:

The MAC entity of the Uu interface receives the MAC SDU from the target logical channel of the Uu interface;

The MAC entity of the Uu interface sends a MAC SDU for the target logical channel of the Uu interface;

Wherein, the target uplink data or target uplink control information is sent by the terminal when it is determined that the Uu interface has no data sending and/or receiving demand but the direct communication interface has data sending and/or receiving demand.
The method according to claim 2, wherein, in the case that the data transmission state of the terminal on the direct communication interface includes the resource allocation mode of the direct communication interface, the radio resource control RRC state of the maintenance terminal on the Uu interface ,include:

Maintaining a second timer, when the second timer expires and the direct communication interface uses the resource allocation mode scheduled by the network or at least one radio bearer on the direct communication interface uses the resource allocation mode scheduled by the network, Maintaining the RRC state of the terminal on the Uu interface in the RRC connected state;

When the second timer expires and the direct communication interface does not use the network-scheduled resource allocation mode or any radio bearer on the direct communication interface does not use the network-scheduled resource allocation mode, the The RRC state of the terminal on the Uu interface is changed from the RRC connected state to the RRC idle state or the RRC inactive state;

Wherein, the maintenance of the second timer refers to starting or restarting the second timer when at least one of the following conditions is met:

The MAC entity of the Uu interface receives the MAC SDU from the target logical channel of the Uu interface;

The MAC entity of the Uu interface sends the MAC SDU for the target logical channel of the Uu interface.
The method according to claim 2, wherein, in the case that the data transmission state of the terminal on the direct communication interface includes the resource allocation mode of the direct communication interface, the maintenance terminal's radio resource control RRC state on the Uu interface ,include:

Maintain a second timer, and restart the second timer if the direct communication interface meets the following conditions at the time of the expiration of the second timer or in the first time period before the second timer expires : The direct communication interface uses a network-scheduled resource allocation mode or at least one radio bearer on the direct communication interface uses a network-scheduled resource allocation mode;

In the case where the second timer expires, changing the RRC state of the terminal on the Uu interface from the RRC connected state to the RRC idle state or the RRC inactive state;

Wherein, the maintenance of the second timer refers to starting or restarting the second timer when at least one of the following conditions is met:

The MAC entity of the Uu interface receives the MAC SDU from the target logical channel of the Uu interface;

The MAC entity of the Uu interface sends the MAC SDU for the target logical channel of the Uu interface.
The method according to claim 2, wherein, in the case that the data transmission state of the terminal on the direct communication interface includes the resource allocation mode of the direct communication interface, the maintenance terminal's radio resource control RRC state on the Uu interface ,include:

Maintain a second timer. At the timeout of the second timer or in the first time period before the second timer expires, if the target downlink data sent by the network side device is received, restart the second timer. Timer; wherein, the target downlink data is when the network side device determines that the Uu interface has no data transmission and/or reception requirements and the direct communication interface uses the resource allocation mode of network scheduling or the direct communication interface Is sent when at least one radio bearer uses a resource allocation mode scheduled by the network;

In the case where the second timer expires, changing the RRC state of the terminal on the Uu interface from the RRC connected state to the RRC idle state or the RRC inactive state;

Wherein, the maintenance of the second timer refers to starting or restarting the second timer when at least one of the following conditions is met:

The media access control MAC entity of the Uu interface receives the MAC SDU from the target logical channel of the Uu interface;

The MAC entity of the Uu interface sends the MAC SDU for the target logical channel of the Uu interface.
The method according to claim 2, wherein, in the case that the data transmission state of the terminal on the direct communication interface includes the resource allocation mode of the direct communication interface, the maintenance terminal's radio resource control RRC state on the Uu interface ,include:

Sending target uplink data or target uplink control information to the network side device at the timeout moment of the second timer or in the first time period before the second timer expires, so as to restart the second timer; Wherein, the target uplink data or target uplink control information is when the terminal determines that the Uu interface has no data transmission and/or reception requirements and the direct communication interface uses a network-scheduled resource allocation mode or the direct communication interface Is sent when at least one radio bearer uses a resource allocation mode scheduled by the network;

In the case where the second timer expires, changing the RRC state of the terminal on the Uu interface from the RRC connected state to the RRC idle state or the RRC inactive state;

Wherein, the maintenance of the second timer refers to starting or restarting the second timer when at least one of the following conditions is met:

The MAC entity of the Uu interface receives the MAC SDU from the target logical channel of the Uu interface;

The MAC entity of the Uu interface sends the MAC SDU for the target logical channel of the Uu interface.
The method of claim 3, wherein:

The Uu interface target logical channel includes one or more of the following:

Uu interface dedicated service channel; Uu interface dedicated control channel; Uu interface public control channel;

The direct communication interface target logical channel includes one or more of the following:

Direct communication interface service channel; direct communication interface interface broadcast control channel; direct communication interface interface control channel.
The method according to claim 7 or 11, wherein the target downlink data includes: an empty MAC SDU or an empty MAC protocol data unit PDU.
The method according to claim 8 or 12, wherein the target uplink data includes: an empty MAC SDU or an empty MAC PDU; the target uplink control information includes an empty buffer status report BSR MAC control unit CE.
The method according to claim 7 or 11, wherein the method further comprises:

When the direct communication interface has a demand for data sending and/or receiving, sending instruction information to the network side device.
An interface state maintenance method, applied to network side equipment, includes:

Receiving terminal's instruction information;

According to the instruction information, it is determined whether the terminal has a data transmission and/or reception requirement on the direct communication interface.
The method according to claim 17, further comprising:

Maintaining a second timer, sending target downlink data to the terminal at the timeout moment of the second timer or in the first time period before the second timer expires, and restarting the second timer;

In the case where the second timer expires, changing the RRC state of the terminal on the Uu interface from the RRC connected state to the RRC idle state or the RRC inactive state;

Wherein, the maintenance of the second timer refers to starting or restarting the second timer when at least one of the following conditions is met:

The MAC entity of the Uu interface receives the MAC SDU from the target logical channel of the Uu interface;

The MAC entity of the Uu interface sends a MAC SDU for the target logical channel of the Uu interface;

Wherein, the target downlink data is when the network side device determines that the Uu interface has no data sending and/or receiving requirements, but according to the indication information, it is determined that the terminal has data sending and/or receiving requirements on the direct communication interface. Sent under the circumstances.
The method according to claim 18, wherein the target downlink data comprises: an empty MAC SDU or an empty MAC PDU.
An interface state maintenance device, applied to a terminal, including:

The processing module is used to maintain the radio resource control RRC state of the terminal on the Uu interface according to the following information:

The data transmission state of the terminal on the Uu interface, and the data transmission state of the terminal on the direct communication interface.
The device according to claim 20, wherein the data transmission status of the terminal on the direct communication interface includes any one of the following:

Sending and/or receiving data of the terminal on the direct communication interface;

The resource allocation mode of the direct communication interface;

Wherein, the data of the direct communication interface includes user plane data and/or control plane data.
An interface state maintenance device, applied to network side equipment, includes:

The receiving module is used to receive the indication information of the terminal;

The determining module is configured to determine, according to the instruction information, whether the terminal has a data transmission and/or reception requirement on the direct communication interface.
The device according to claim 22, further comprising:

The processing module is configured to maintain a second timer, and send target downlink data to the terminal at the timeout moment of the second timer or in the first time period before the second timer expires, and restart the Second timer

In the case where the second timer expires, changing the RRC state of the terminal on the Uu interface from the RRC connected state to the RRC idle state or the RRC inactive state;

Wherein, the maintenance of the second timer refers to starting or restarting the second timer when at least one of the following conditions is met:

The MAC entity of the Uu interface receives the MAC SDU from the target logical channel of the Uu interface;

The MAC entity of the Uu interface sends a MAC SDU for the target logical channel of the Uu interface;

Wherein, the target downlink data is when the network side device determines that the Uu interface has no data sending and/or receiving requirements, but according to the indication information, it is determined that the terminal has data sending and/or receiving requirements on the direct communication interface. Sent under the circumstances.
An interface state maintenance device, applied to a terminal, including: a transceiver, a memory, a processor, and a program stored on the memory and running on the processor; wherein,

The processor is used to read the program in the memory and execute the following process:

According to the following information, the maintenance terminal's radio resource control RRC state on the Uu interface:

The data transmission state of the terminal on the Uu interface, and the data transmission state of the terminal on the direct communication interface.
The device according to claim 24, wherein the data transmission status of the terminal on the direct communication interface includes any one of the following:

Sending and/or receiving data of the terminal on the direct communication interface;

The resource allocation mode of the direct communication interface;

Wherein, the data of the direct communication interface includes user plane data and/or control plane data.
The device according to claim 25, wherein, in the case where the data transmission state of the terminal on the direct communication interface includes the sending and/or receiving of data by the terminal on the direct communication interface, the processor is further configured to Read the program in the memory and execute the following process:

Maintaining a first timer, and when the first timer times out, changing the RRC state of the terminal on the Uu interface from the RRC connected state to the RRC idle state or the RRC inactive state;

Wherein, maintaining the first timer refers to starting or restarting the first timer when at least one of the following conditions is met:

The MAC entity of the Uu interface receives the MAC SDU from the target logical channel of the Uu interface;

The MAC entity of the Uu interface sends a MAC SDU for the target logical channel of the Uu interface;

The MAC entity of the direct communication interface receives the MAC SDU from the target logical channel of the direct communication interface;

The MAC entity of the direct communication interface sends a MAC SDU for the target logical channel of the direct communication interface.
The device according to claim 25, wherein, in the case where the data transmission state of the terminal on the direct communication interface includes the sending and/or receiving of data by the terminal on the direct communication interface, the processor is further configured to Read the program in the memory and execute the following process:

Maintain the second timer and the third timer respectively, and in the case that both the second timer and the third timer expire, change the RRC state of the terminal on the Uu interface from the RRC connected state to RRC idle state or RRC inactive state;

Wherein, maintaining the second timer refers to starting or restarting the second timer when at least one of the following conditions is met:

The MAC entity of the Uu interface receives the MAC SDU from the target logical channel of the Uu interface;

The MAC entity of the Uu interface sends a MAC SDU for the target logical channel of the Uu interface;

Wherein, maintaining the third timer refers to starting or restarting the third timer when at least one of the following conditions is met:

The MAC entity of the direct communication interface receives the MAC SDU from the target logical channel of the direct communication interface;

The MAC entity of the direct communication interface sends a MAC SDU for the target logical channel of the direct communication interface.
The device according to claim 25, wherein, in the case where the data transmission state of the terminal on the direct communication interface includes the sending and/or receiving of data by the terminal on the direct communication interface, the processor is further configured to Read the program in the memory and execute the following process:

Maintaining a second timer, and maintaining the RRC state of the terminal on the Uu interface in the RRC connected state when the second timer times out and the direct communication interface has data transmission and/or reception requirements; When the second timer expires and the direct communication interface has no data transmission and/or reception requirements, the RRC state of the terminal on the Uu interface is changed from the RRC connected state to the RRC idle state or the RRC non-RRC state. Active state

Wherein, the maintenance of the second timer refers to starting or restarting the second timer when at least one of the following conditions is met:

The MAC entity of the Uu interface receives the MAC SDU from the target logical channel of the Uu interface;

The MAC entity of the Uu interface sends the MAC SDU for the target logical channel of the Uu interface.
The device according to claim 25, wherein, in the case where the data transmission state of the terminal on the direct communication interface includes the sending and/or receiving of data by the terminal on the direct communication interface, the processor is further configured to Read the program in the memory and execute the following process:

Maintain a second timer, and restart the second timer if the direct communication interface meets the following conditions at the time of the expiration of the second timer or in the first time period before the second timer expires : The direct communication interface has data sending and/or receiving requirements;

In the case where the second timer expires, changing the RRC state of the terminal on the Uu interface from the RRC connected state to the RRC idle state or the RRC inactive state;

Wherein, the maintenance of the second timer refers to starting or restarting the second timer when at least one of the following conditions is met:

The MAC entity of the Uu interface receives the MAC SDU from the target logical channel of the Uu interface;

The MAC entity of the Uu interface sends the MAC SDU for the target logical channel of the Uu interface.
The device according to claim 25, wherein, in the case where the data transmission state of the terminal on the direct communication interface includes the sending and/or receiving of data by the terminal on the direct communication interface, the processor is further configured to Read the program in the memory and execute the following process:

Maintain a second timer. At the timeout of the second timer or in the first time period before the second timer expires, if the target downlink data sent by the network side device is received, restart the second timer. Timer

In the case where the second timer expires, changing the RRC state of the terminal on the Uu interface from the RRC connected state to the RRC idle state or the RRC inactive state;

Wherein, the maintenance of the second timer refers to starting or restarting the second timer when at least one of the following conditions is met:

The MAC entity of the Uu interface receives the MAC SDU from the target logical channel of the Uu interface;

The MAC entity of the Uu interface sends a MAC SDU for the target logical channel of the Uu interface;

Wherein, the target downlink data is sent by the network-side device when it is determined that the Uu interface has no data sending and/or receiving requirements but the direct communication interface has data sending and/or receiving requirements.
The device according to claim 25, wherein, in the case where the data transmission state of the terminal on the direct communication interface includes the sending and/or receiving of data by the terminal on the direct communication interface, the processor is further configured to Read the program in the memory and execute the following process:

Maintain a second timer, and send target uplink data or target uplink control information to the network side device at the time of the expiration of the second timer or in the first time period before the expiration of the second timer, so as to restart all The second timer;

In the case where the second timer expires, changing the RRC state of the terminal on the Uu interface from the RRC connected state to the RRC idle state or the RRC inactive state;

Wherein, the maintenance of the second timer refers to starting or restarting the second timer when at least one of the following conditions is met:

The MAC entity of the Uu interface receives the MAC SDU from the target logical channel of the Uu interface;

The MAC entity of the Uu interface sends a MAC SDU for the target logical channel of the Uu interface;

Wherein, the target uplink data or target uplink control information is sent by the terminal when it is determined that the Uu interface has no data sending and/or receiving demand but the direct communication interface has data sending and/or receiving demand.
The device according to claim 25, wherein, in the case that the data transmission state of the direct communication interface of the terminal includes the resource allocation mode of the direct communication interface, the processor is further configured to read the program in the memory , Perform the following process:

Maintaining a second timer, when the second timer expires and the direct communication interface uses the resource allocation mode scheduled by the network or at least one radio bearer on the direct communication interface uses the resource allocation mode scheduled by the network, Maintaining the RRC state of the terminal on the Uu interface in the RRC connected state;

When the second timer expires and the direct communication interface does not use the network-scheduled resource allocation mode or any radio bearer on the direct communication interface does not use the network-scheduled resource allocation mode, the The RRC state of the terminal on the Uu interface is changed from the RRC connected state to the RRC idle state or the RRC inactive state;

Wherein, the maintenance of the second timer refers to starting or restarting the second timer when at least one of the following conditions is met:

The MAC entity of the Uu interface receives the MAC SDU from the target logical channel of the Uu interface;

The MAC entity of the Uu interface sends the MAC SDU for the target logical channel of the Uu interface.
The device according to claim 25, wherein, in the case that the data transmission state of the direct communication interface of the terminal includes the resource allocation mode of the direct communication interface, the processor is further configured to read the program in the memory , Perform the following process:

Maintain a second timer, and restart the second timer if the direct communication interface meets the following conditions at the time of the expiration of the second timer or in the first time period before the second timer expires : The direct communication interface uses a network-scheduled resource allocation mode or at least one radio bearer on the direct communication interface uses a network-scheduled resource allocation mode;

In the case where the second timer expires, changing the RRC state of the terminal on the Uu interface from the RRC connected state to the RRC idle state or the RRC inactive state;

Wherein, the maintenance of the second timer refers to starting or restarting the second timer when at least one of the following conditions is met:

The MAC entity of the Uu interface receives the MAC SDU from the target logical channel of the Uu interface;

The MAC entity of the Uu interface sends the MAC SDU for the target logical channel of the Uu interface.
The device according to claim 25, wherein, in the case that the data transmission state of the direct communication interface of the terminal includes the resource allocation mode of the direct communication interface, the processor is further configured to read the program in the memory , Perform the following process:

Sending target uplink data or target uplink control information to the network side device at the timeout moment of the second timer or in the first time period before the second timer expires, so as to restart the second timer; Wherein, the target uplink data or target uplink control information is when the terminal determines that the Uu interface has no data transmission and/or reception requirements and the direct communication interface uses a network-scheduled resource allocation mode or the direct communication interface Is sent when at least one radio bearer uses a resource allocation mode scheduled by the network;

In the case where the second timer expires, changing the RRC state of the terminal on the Uu interface from the RRC connected state to the RRC idle state or the RRC inactive state;

Wherein, the maintenance of the second timer refers to starting or restarting the second timer when at least one of the following conditions is met:

The MAC entity of the Uu interface receives the MAC SDU from the target logical channel of the Uu interface;

The MAC entity of the Uu interface sends the MAC SDU for the target logical channel of the Uu interface.
An interface state maintenance device, applied to a network side device, including: a transceiver, a memory, a processor, and a program stored on the memory and running on the processor; wherein,

The processor is used to read the program in the memory and execute the following process:

Receiving terminal's instruction information;

According to the instruction information, it is determined whether the terminal has a data transmission and/or reception requirement on the direct communication interface.
The device according to claim 35, wherein the processor is further configured to read a program in the memory and execute the following process:

Maintaining a second timer, sending target downlink data to the terminal at the timeout moment of the second timer or in the first time period before the second timer expires, and restarting the second timer;

In the case where the second timer expires, changing the RRC state of the terminal on the Uu interface from the RRC connected state to the RRC idle state or the RRC inactive state;

Wherein, the maintenance of the second timer refers to starting or restarting the second timer when at least one of the following conditions is met:

The MAC entity of the Uu interface receives the MAC SDU from the target logical channel of the Uu interface;

The MAC entity of the Uu interface sends a MAC SDU for the target logical channel of the Uu interface;

Wherein, the target downlink data is when the network side device determines that the Uu interface has no data sending and/or receiving requirements, but according to the indication information, it is determined that the terminal has data sending and/or receiving requirements on the direct communication interface. Sent under the circumstances.
A computer-readable storage medium for storing a program, wherein when the program is executed by a processor, the steps in the method according to any one of claims 1 to 16 are implemented; or, the program is executed by the processor When executed, the steps in the method according to any one of claims 17 to 19 are realized.