WO2023125730A1

WO2023125730A1 - State switching method and apparatus, and device

Info

Publication number: WO2023125730A1
Application number: PCT/CN2022/143046
Authority: WO
Inventors: 韩立锋
Original assignee: 展讯通信（上海）有限公司
Priority date: 2021-12-30
Filing date: 2022-12-28
Publication date: 2023-07-06
Also published as: CN116419434A

Abstract

The present application provides a state switching method and apparatus, and a device. The method comprises: there being a terminal device that comprises a multicast service and is in an RRC idle state or an RRC inactive state; and when satisfying an RRC state switching condition, the terminal device performing RRC state switching. Therefore, the flexibility of multicast service receiving is improved.

Description

State transition method, device and equipment

This application claims priority to a Chinese patent application filed with the China Patent Office on December 30, 2021 with application number 202111669648.4 and titled "State Transition Method, Apparatus, and Equipment," the entire contents of which are incorporated herein by reference .

technical field

The present application relates to the communication field, and in particular to a state transition method, device and equipment.

Background technique

The terminal device can receive the multicast service sent by the base station. For example, the terminal device can obtain the multicast service sent by the base station through radio resource control (Radio Resource Control, RRC).

Currently, a terminal device can receive a multicast service sent by a base station in an RRC idle state, an RRC connected state, and an RRC inactive state. For example, when the RRC state of the terminal device is connected, the terminal device can receive the multicast service sent by the base station, and feed back the reception result to the base station. However, after the terminal device is set to the RRC state, the terminal device can only receive the multicast service sent by the base station in this RRC state, which leads to low flexibility for the terminal device to receive the multicast service.

Contents of the invention

The present application provides a state transition method, device and equipment, which are used to solve the technical problem in the prior art that terminal equipment has low flexibility in receiving multicast services.

In a first aspect, the present application provides a state transition method, the method comprising:

There is a terminal device in the RRC idle state or the RRC inactive state including the multicast service, and when the terminal device satisfies the RRC state transition condition, the terminal device performs the RRC state transition.

In a possible implementation manner, the RRC state transition condition includes at least one of the following:

receiving indication information sent by the base station, where the indication information is used to instruct the terminal device to perform RRC state transition;

The data packets that the terminal device fails to receive in the RRC idle state or in the inactive state meet a preset condition;

The RRC state transition timer of the terminal device times out.

In a possible implementation manner, receiving the indication information sent by the base station includes:

Receive a paging message sent by the base station, where the paging message includes the indication information.

In a possible implementation manner, the paging message further includes a target RRC state, where the target RRC state is an RRC state after the RRC state transition of the terminal device.

In a possible implementation manner, the paging message further includes the identifier of the first multicast service, and the terminal equipment receiving or waiting to receive the first multicast service adopts the indication information; the indication information uses When instructing the terminal device to receive or wait to receive the first multicast service in the RRC idle state or inactive state, RRC state transition is performed.

In a possible implementation manner, the preset conditions include at least one of the following:

The number of data packets that the terminal device fails to receive in the RRC idle state or the inactive state is greater than or equal to a first threshold;

The ratio of the terminal device failing to receive data packets in the RRC idle state or in the inactive state is greater than or equal to a second threshold;

The number of data packets that the terminal device fails to receive continuously in the RRC idle state or in the inactive state is greater than or equal to a third threshold;

A ratio of data packets that the terminal device fails to continuously receive in the RRC idle state or in the inactive state is greater than or equal to a fourth threshold.

In a possible implementation manner, the method also includes:

The terminal device receives the RRC message sent by the base station, and the RRC message includes the RRC state transition timer.

In a possible implementation manner, the RRC message includes:

The second multicast service, the RRC state transition timer is associated with the second multicast service, and when the terminal device receives the second multicast service or receives the second multicast service after a preset period of time, the terminal device starts the The RRC state transition timer described above.

In a possible implementation manner, the RRC message includes at least one of the following:

RRC rejection message, RRC release message, RRC establishment message, RRC recovery message, RRC reconfiguration message.

In a possible implementation manner, the RRC state transition performed by the terminal device includes:

The terminal device sends a request message to the base station, the request message includes a cause value, and the cause value is the reception of the multicast service;

The terminal device receives a response message corresponding to the request message sent by the base station;

The terminal device performs RRC state transition according to the response message.

In a possible implementation manner, the terminal device is in the RRC idle state;

The request message is an RRC establishment request message;

The response message is an RRC establishment message or an RRC rejection message.

In a possible implementation manner, the terminal device performs RRC state transition according to the response message, including:

If the response message is an RRC establishment message, the terminal device switches to an RRC connection state;

If the response message is an RRC rejection message, the terminal device resides in the RRC idle state.

In a possible implementation manner, the terminal device is in the inactive state;

The request message is an RRC recovery request message;

The response message is an RRC resume message, or an RRC reject message, or an RRC release message.

If the response message is an RRC recovery message, the terminal device switches to an RRC connection state;

If the response message is an RRC rejection message, the terminal device switches to the RRC idle state;

If the response message is an RRC release message, when the RRC release message includes configuration information, the terminal device stays in the inactive state, and when the RRC release message does not include the configuration information, The terminal equipment switches to the RRC idle state.

In a possible implementation manner, the terminal device has a multicast service, including:

The terminal device is executing the multicast service; or,

The terminal device is to execute the multicast service.

In a second aspect, the present application provides a state conversion device, including a conversion module, wherein:

The conversion module is used for, there is a terminal device in RRC idle state or RRC inactive state including multicast service, and when the terminal device meets the RRC state transition condition, the terminal device performs RRC state transition.

The RRC state transition timer of the terminal device times out.

In a possible implementation manner, the conversion module is specifically used for:

In a possible implementation manner, the state conversion device further includes a receiving module, and the receiving module is configured to:

Receive an RRC message sent by the base station, where the RRC message includes the RRC state transition timer.

In a possible implementation manner, the RRC message includes:

The request message is an RRC establishment request message;

The request message is an RRC recovery request message;

In a possible implementation manner, the conversion module is specifically configured to: if the response message is an RRC recovery message, switch the terminal device to an RRC connection state;

The terminal device is executing the multicast service; or,

The terminal device is to execute the multicast service.

In a third aspect, the present application provides a terminal device, including: a processor and a memory;

the memory stores computer-executable instructions;

The processor executes the computer-implemented instructions stored in the memory, so that the processor executes the state transition method as described in the first aspect.

In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, where computer-executable instructions are stored in the computer-readable storage medium, and when the computer-executable instructions are executed by a processor, they are used to implement any of the foregoing The state transition method described above.

In a fifth aspect, the present invention further provides a computer program product, including a computer program, and when the computer program is executed by a processor, the steps of the state transition method described in any one of the preceding items are implemented.

The present application provides a state transition method, device and equipment. There is a terminal device in RRC idle state or RRC inactive state including multicast service. When the terminal device meets the RRC state transition condition, the terminal device performs RRC state transition. In the above method, when the terminal equipment meets the RRC state transition conditions, the terminal equipment can convert the RRC idle state or the RRC inactive state to the RRC connected state, and then when receiving the multicast service, feed back the receiving result to the base station to improve the performance of multicast. service receiving effect, and the terminal equipment can flexibly control the state of the RRC to realize the transition of the RRC state, thereby improving the flexibility of the terminal equipment to receive the multicast service.

Description of drawings

FIG. 1 is a schematic diagram of an application scenario provided by an embodiment of the present application;

FIG. 2 is a schematic flow chart of a state transition method provided in an embodiment of the present application;

FIG. 3 is a schematic diagram of RRC state transition performed by a terminal device provided in an embodiment of the present application;

FIG. 4 is a schematic diagram of a process of receiving a response message provided by an embodiment of the present application;

FIG. 5 is a schematic diagram of another process for receiving a response message provided by an embodiment of the present application;

FIG. 6A is a schematic diagram of an RRC state transition process provided by an embodiment of the present application;

FIG. 6B is a schematic diagram of another RRC state transition process provided by the embodiment of the present application;

FIG. 7A is a schematic diagram of an RRC state transition process provided by an embodiment of the present application;

FIG. 7B is a schematic diagram of another RRC state transition process provided by the embodiment of the present application;

FIG. 7C is a schematic diagram of another RRC state transition process provided by the embodiment of the present application;

FIG. 7D is a schematic diagram of another RRC state transition process provided by the embodiment of the present application;

FIG. 8 is a schematic diagram of a state transition method provided by an embodiment of the present application;

FIG. 9 is a schematic structural diagram of a state conversion device provided by an embodiment of the present application;

FIG. 10 is a schematic structural diagram of another state conversion device provided in the embodiment of the present application;

FIG. 11 is a schematic diagram of a hardware structure of a terminal device provided by the present application.

Detailed ways

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present application as recited in the appended claims.

It should be noted that, in this document, the term "comprising", "comprising" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus comprising that element.

For ease of understanding, concepts involved in the embodiments of the present application are described first.

Terminal device: It is a device with wireless transceiver function. Terminal equipment can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; it can also be deployed on water (such as ships, etc.); it can also be deployed in the air (such as on aircraft, balloons and satellites, etc.). The terminal device may be a mobile phone, a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (virtual reality, VR) terminal device, an augmented reality (augmented reality, AR) terminal device, an industrial control ( Wireless terminals in industrial control, vehicle-mounted terminal equipment, wireless terminals in self driving, wireless terminal equipment in remote medical, wireless terminal equipment in smart grid, transportation safety Wireless terminal devices in (transportation safety), wireless terminal devices in smart cities, wireless terminal devices in smart homes, wearable terminal devices, etc. The terminal equipment involved in the embodiments of the present application may also be referred to as terminal, user equipment (UE), access terminal equipment, vehicle-mounted terminal, industrial control terminal, UE unit, UE station, mobile station, mobile station, remote station , remote terminal equipment, mobile equipment, UE terminal equipment, wireless communication equipment, UE agent or UE device, etc. Terminal equipment can also be fixed or mobile.

Core network: It is a network composed of core network elements. Wherein, the core network element may also be referred to as a core network device, which is a network element deployed in the core network, such as a core network control plane network element or a core network user plane network element. The core network in the embodiment of the present application may be an evolved packet core network (Evolved Packet Core, EPC), a 5G core network (5G Core Network), or a new core network in a future communication system. For example, the 5G core network consists of a group of network elements, and implements mobility management functions such as access and mobility management functions (Access and Mobility Management Function, AMF), and provides data packet routing and forwarding and QoS (Quality of Service) management The user plane function (User Plane Function, UPF) that provides functions such as session management, IP address allocation and management, and the session management function (Session Management Function, SMF) that provide functions such as session management, etc. EPC can be composed of a Mobility Management Entity (MME) that provides functions such as mobility management and gateway selection, a Serving Gateway (S-GW) that provides functions such as data packet forwarding, and a PDN Gateway that provides functions such as terminal address allocation and rate control. (P-GW) composition. For Multicast Broadcast Service (MBS), the core network can contain several new network elements to realize data packet forwarding, MBS conference management, QoS management, transmission mode switching (unicast and multicast/broadcast transmission) switch between modes) and other functions. Another way is that the functions can be realized by existing core network elements.

In the related technology, the terminal device can obtain the multicast service sent by the base station through RRC. For example, the terminal device can receive the multicast service sent by the base station in different RRC states. Currently, a terminal device can receive a multicast service sent by a base station in an RRC idle state, an RRC connected state, and an RRC inactive state. For example, when the RRC state of the terminal device is in the idle state, the terminal device can receive the multicast service sent by the base station; when the RRC state of the terminal device is in the connected state, the terminal device can not only receive the multicast service sent by the base station, but also send The base station sends the reception result of the multicast service. However, after the terminal device sets the RRC state, the terminal device can only receive the multicast service sent by the base station in this RRC state. For example, if the RRC state set by the terminal device is the idle state, when the base station broadcasts the multicast service, the terminal device can only receive the multicast service sent by the base station in the RRC idle state. This results in a low degree of flexibility for the terminal device to receive the multicast service.

In order to solve the technical problem of low flexibility for terminal equipment to receive multicast services in the related art, the embodiment of the present application provides a state transition method. When the terminal equipment has multicast services, the RRC state of the terminal equipment is determined. In the RRC state In the idle state or inactive state, if the terminal device receives the indication information sent by the base station instructing the terminal device to perform RRC state transition, or the terminal device fails to receive the data packet in the RRC idle state or inactive state and meets the preset conditions, Or, when the RRC state transition timer of the terminal device expires, the terminal device performs RRC state transition. In this way, when the terminal equipment receives the multicast service sent by the base station, the terminal equipment can switch the RRC idle state or the RRC inactive state to the RRC connection state, and then after receiving the multicast service, it can feed back the receiving result to the base station to improve the multicast service. In addition, the terminal device can flexibly control the state of the RRC to realize the transition of the RRC state, thereby improving the flexibility of the terminal device in receiving multicast services.

Next, with reference to FIG. 1 , the application scenario of the embodiment of the present application will be introduced.

FIG. 1 is a schematic diagram of an application scenario provided by an embodiment of the present application. Please refer to Figure 1, including the base station and terminal equipment. Wherein, the RRC state of the terminal equipment is the RRC idle state. When the terminal device receives the multicast service sent by the base station, if the terminal device meets the RRC state transition condition, the terminal device can convert the RRC idle state to the RRC connected state, and receive the multicast service sent by the base station through the RRC connected state. In this way, the terminal device can flexibly control the state of the RRC, realize the transition of the RRC state, and further improve the flexibility of the terminal device in receiving the multicast service.

In the following, the technical solution shown in this application will be described in detail through specific embodiments. It should be noted that the following embodiments may exist independently or may be combined with each other, and the same or similar content will not be repeatedly described in different embodiments.

FIG. 2 is a schematic flowchart of a state transition method provided by an embodiment of the present application. See Figure 2, the method can include:

S201. Determine that there is a terminal device in an RRC idle state or an RRC inactive state including a multicast service.

The execution subject of the embodiment of the present application may be a terminal device, or may be a state transition device set in the terminal device. Optionally, the state conversion device may be implemented by software, or by a combination of software and hardware.

Optionally, the multicast service (Multicast Service, MS) may be a service in which the base station sends data to multiple terminal devices. For example, the multicast service may be a service in which the base station multicasts messages to multiple terminal devices, and the multicast service may also be a service in which the base station sends messages to multiple terminal devices that have joined the multicast.

Optionally, it may be determined that the terminal device has a multicast service according to the following feasible implementation manner: the terminal device is performing the multicast service, or the terminal device is waiting to perform the multicast service. Optionally, when the terminal device receives the multicast service, it is determined that the terminal device has the multicast service. For example, when the terminal device is receiving the multicast service sent by the base station, it can be determined that the terminal device has the multicast service at this time. Optionally, when the terminal device is about to receive the multicast service, it is determined that the terminal device has the multicast service. For example, if the terminal device starts to receive the multicast service sent by the base station after 1 minute, it is determined that the terminal device has the multicast service.

Optionally, the radio resource control RRC state of the terminal device includes: RRC connected state (RRC connected state), RRC inactive state (RRC inactive state) and RRC idle state (RRC idle state). Optionally, when the RRC state of the terminal device is RRC connected state, RRC inactive state or RRC idle state, the terminal device can receive the multicast service sent by the base station. For example, the terminal device can receive the multicast service sent by the base station in the RRC connected state, the terminal device can receive the multicast service sent by the base station in the RRC idle state, and the terminal device can also receive the multicast service sent by the base station in the RRC inactive state business.

Optionally, when the RRC state of the terminal device is the RRC connected state, after receiving the multicast service sent by the base station, the terminal device may also send a reception result of the multicast service to the base station. For example, the RRC state of the terminal device is the RRC connection state, and if the terminal device successfully receives the multicast service sent by the base station, the terminal device sends a message that the multicast service is successfully received to the base station.

S202. When the terminal device meets the RRC state transition condition, the terminal device performs RRC state transition.

Optionally, when there is a terminal device in the RRC idle state or the RRC inactive state including the multicast service, and the terminal device satisfies the RRC state transition condition, the terminal device performs the RRC state transition. For example, if the terminal device is receiving or is about to receive multicast services, and the RRC state of the terminal device is idle or inactive, then it is judged whether the terminal device meets the RRC state transition condition, if so, the terminal device performs RRC state transition, if not , then no RRC state transition is performed.

Optionally, the RRC state transition condition includes at least one of the following: receiving indication information sent by the base station, the terminal equipment receiving failed data packets in the RRC idle state or inactive state satisfying preset conditions, and the RRC state transition timer of the terminal equipment time out.

Optionally, the indication information is used to instruct the terminal equipment to perform RRC state transition. For example, when the terminal device receives the indication information sent by the base station, the terminal device satisfies the RRC state transition condition. For example, when the RRC state of the terminal device is RRC idle state or RRC inactive state, if the terminal device receives the indication information sent by the base station, the terminal device meets the RRC state transition condition, and the terminal device performs RRC state transition, that is, initiates RRC establishment or RRC link recovery procedure.

Optionally, the terminal device may receive the indication information sent by the base station according to the following feasible implementation manner: receiving a paging message sent by the base station. Optionally, the paging message includes indication information. For example, when the base station paging the terminal device within the paging time window, the base station may add 1-bit indication information in the paging message (paging), and when the terminal device receives the paging message, obtain the information sent by the base station in the paging message. instructions for the .

Optionally, the paging message also includes the target RRC status. Wherein, the target RRC state is the RRC state after the terminal equipment performs RRC state transition. For example, the paging message includes indication information and a target RRC state. If the target RRC state is the RRC idle state, the RRC state after the RRC state transition of the terminal device is the RRC idle state. If the target RRC state is the RRC connected state, the terminal The RRC state of the device after the RRC state transition is the RRC connected state, and if the target RRC state is the RRC inactive state, the RRC state of the terminal device after the RRC state transition is the RRC inactive state.

Optionally, the paging message further includes the identifier of the first multicast service. Optionally, the terminal device that is receiving or to receive the first multicast service uses the indication information. For example, the indication information in the paging message is used to instruct the terminal equipment to perform RRC state transition when receiving or waiting to receive the first multicast service in the RRC idle state or inactive state. For example, the RRC state of the terminal equipment is the RRC idle state, if the paging message sent by the base station received by the terminal equipment includes indication information, RRC connection state (target RRC state), and the identifier of the first multicast service, then in the terminal equipment When the device receives or is about to receive the first multicast service, it performs RRC state transition (for example, the terminal device transitions from the RRC idle state to the RRC connected state or the RRC inactive state).

Optionally, the indication message in the paging message may indicate the RRC state transition of a group of terminal equipment. For example, if terminal A, terminal B, and terminal C are included in the multicast network, when terminal A, terminal B, and terminal C receive or are about to receive a multicast message, the paging message sent by the base station can be Including state transition instructions of terminal equipment A, terminal equipment B and terminal equipment C.

Optionally, the network device may carry indication information for RRC state transition indication in multiple paging messages. For example, the network device may add indication information to paging message A, or add indication information to paging message B.

Optionally, the network device may receive the paging message sent by the core network device, and send the paging message to the terminal device. For example, the base station may receive a paging message sent by a network element of the core network, where the paging message includes indication information, and the base station may send the paging message to the terminal device.

Optionally, the network device may send a paging message carrying indication information to the terminal device according to the network status. For example, when the network load of the base station is less than a preset value, the base station may add information instructing the terminal device to switch to the RRC connected state in the paging message, and send the paging message to the terminal device.

Optionally, when the terminal device is in the RRC idle state or the inactive state, if the terminal device fails to receive the data packet in the RRC idle state or the RRC inactive state and meets the preset condition, it is determined that the terminal device meets the RRC state transition condition. For example, when the RRC state of the terminal device is the RRC idle state, if the number of data packets that the terminal device fails to receive in the RRC idle state is greater than a preset threshold, it is determined that the terminal device meets the RRC state transition condition, and the terminal device performs RRC state transition.

Optionally, the preset conditions include at least one of the following: the number of data packets that the terminal device fails to receive in the RRC idle state or inactive state is greater than or equal to the first threshold; the terminal device receives in the RRC idle state or inactive state The proportion of failed data packets is greater than or equal to the second threshold; the number of continuously failed data packets received by the terminal device in the RRC idle state or inactive state is greater than or equal to the third threshold; the terminal device is in the RRC idle state or inactive state The proportion of data packets that fail to receive consecutively is greater than or equal to the fourth threshold.

Optionally, if the number of data packets that fail to be received by the terminal device in the RRC idle state or inactive state is greater than or equal to a first threshold, it is determined that the data packets that fail to be received meet a preset condition. For example, when the first threshold is 5, if the number of data packets that the terminal device fails to receive in the RRC idle state is 5, it is determined that the data packets that the terminal device fails to receive meet the preset condition.

Optionally, if the proportion of the terminal device that fails to receive the data packets in the RRC idle state or the inactive state is greater than or equal to the second threshold, it is determined that the data packets that fail to receive meet the preset condition. For example, when the second threshold is 50%, if the number of data packets received by the terminal device in the RRC idle state is 10, and the number of data packets that fail to be received is 5, then it is determined that the data packets that the terminal device fails to receive meet the preset condition . For example, when the second preset is 50%, if the number of data packets received by the terminal device within the preset period is 10, and the number of data packets that the terminal device fails to receive in the RRC idle state is 5, it is determined that the terminal device has failed to receive The data packets meet the preset conditions.

If the number of data packets that the terminal equipment fails to receive continuously in the RRC idle state or inactive state is greater than or equal to the third threshold, it is determined that the data packets that fail to receive meet the preset condition. For example, the third threshold is 3, and if the terminal device continuously fails to receive the data packets in the RRC inactive state is 3, it is determined that the terminal device fails to receive the data packets to meet the preset condition.

If the proportion of the terminal device that fails to continuously receive the data packets in the RRC idle state or the inactive state is greater than or equal to the fourth threshold, it is determined that the data packets that fail to receive meet the preset condition. For example, when the fourth threshold is 50%, if the number of data packets received by the terminal device in the RRC idle state is 10, and the number of data packets that fail to receive continuously is 5, then it is determined that the data packets that the terminal device fails to receive meet the preset requirements. condition.

Optionally, the foregoing first threshold, second threshold, third threshold, and fourth threshold may be configured by the base station, or may be set by the terminal device itself. For example, the base station may configure the above threshold through RRC dedicated signaling or system information, or the terminal device may configure the above threshold according to the QoS parameter of the multicast service, which will not be described in this embodiment of the present application.

Optionally, when the RRC state of the terminal device is RRC idle state or RRC inactive state, if the RRC state transition timer of the terminal device expires, it is determined that the terminal device meets the RRC state transition kit, and the terminal device performs RRC state transition. Further, the timer is associated with the second multicast service, that is, the timer will be used only when the terminal device receives or is about to receive the second multicast service. Otherwise, the timer is not used.

Optionally, the RRC state transition timer is used to indicate the duration for which the RRC state of the terminal equipment is the RRC idle state or the RRC inactive state. For example, the RRC state transition timer of the terminal device is set to a duration of 30 minutes. If the duration of the terminal device in the idle state is longer than 30 minutes, it is determined that the RRC state transition timer of the terminal device has expired, and the terminal initiates RRC connection establishment and transitions to RRC Connected state; the terminal device can also convert the RRC inactive state to the RRC idle state.

Optionally, the base station may configure the RRC state transition timer of the terminal equipment, and send the state transition timer to the terminal equipment. Optionally, the terminal device may receive the RRC message sent by the base station. Wherein, the RRC message includes an RRC state transition timer. For example, when the terminal device receives the RRC hour from the base station, the RRC state transition timer configured by the base station for the terminal device may be acquired in an RRC message. For example, when the network load of the base station is heavy, the base station can add an RRC state transition timer to the RRC message sent to the terminal equipment, wherein the duration of the RRC state transition timer can be required when the network load of the base station is reduced to a smooth network. In this way, the terminal device can first receive multicast messages in the RRC idle state or inactive state. When the network of the network device is unblocked, the RRC state transition timer in the terminal device expires, and the RRC state of the terminal device can be changed by the RRC idle state. state or RRC inactive state to RRC connected state. Optionally, the RRC message also includes the second multicast service, and the RRC state transition timer is associated with the second multicast service. When the terminal device receives the second multicast service or receives the second multicast service after a preset period of time, the terminal device starts the RRC state transition timer.

Optionally, the RRC message includes at least one of the following: RRC rejection (RRCReject) message, RRC release (RRCRelease) message, RRC setup (RRCSetup) message, RRC recovery (RRCResume) message, RRC reconfiguration (RRCReconfiguration) message.

Optionally, when the base station sends the above RRC message to the terminal device, the RRC message may include the RRC state transition timer configured by the base station.

Optionally, when the terminal device has a multicast service, if the RRC state of the terminal device is RRC idle state or RRC inactive state, and the terminal device meets the RRC state transition condition, the terminal device can perform RRC state transition. For example, the terminal device may switch the RRC state from the RRC idle state to the RRC connected state, or the terminal device may switch the RRC inactive state to the RRC idle state or the RRC connected state.

An embodiment of the present application provides a state transition method. When the terminal device has a multicast service, determine the RRC state of the terminal device. When the RRC state is idle or inactive, if the terminal device receives an instruction sent by the base station The indication information of the RRC state transition, or, the terminal device fails to receive the data packet in the RRC idle state or the inactive state meets the preset condition, or, the RRC state transition timer of the terminal device expires, and the terminal device performs the RRC state transition. In this way, when the terminal device satisfies the RRC state transition condition, the terminal device can flexibly control the RRC state to realize the RRC state transition, thereby improving the flexibility of the terminal device in receiving multicast services.

On the basis of the embodiment shown in FIG. 2 , the process of RRC state transition performed by the terminal device in the embodiment shown in FIG. 2 will be described in detail below with reference to FIG. 3 .

FIG. 3 is a schematic diagram of RRC state transition performed by a terminal device provided by an embodiment of the present application. Please refer to Figure 3, the method flow includes:

S301. The terminal device sends a request message to the base station.

Optionally, the request message includes a cause value, and the cause value is the reception of the multicast service. There are two situations in which the terminal device sends a request message to the base station as follows:

Case 1: The terminal equipment is in the RRC idle state.

Optionally, when the RRC state of the terminal device is the RRC idle state, the request message sent by the terminal device to the base station is an RRC establishment request message. For example, when the RRC state of the terminal device is the RRC idle state, the terminal device may send an RRC setup request (RRCSetupRequest) message to the base station to request that the RRC state of the terminal device be converted from the RRC idle state to the RRC connected state.

Optionally, the terminal device may add a cause value in the RRC establishment request message. For example, the terminal device may include a cause value of "reception of multicast service" in the RRC establishment request message.

Case 2: RRC is in an inactive state.

Optionally, when the RRC state of the terminal device is the RRC inactive state, the request message sent by the terminal device to the base station is an RRC recovery request message. For example, when the RRC state of the terminal device is the RRC inactive state, the terminal device may send an RRC resume request (RRCResumeRequest) message to the base station to request that the RRC state of the terminal device be converted from the RRC idle state to the RRC connected state.

Optionally, the terminal device may add a cause value in the RRC recovery request message. For example, the terminal device may add a cause value of "reception of multicast service" in the RRC establishment request message.

S302. The terminal device receives a response message corresponding to the request message sent by the base station.

Optionally, the terminal device receives the response message corresponding to the request message sent by the base station in the following two cases:

Case 1: The terminal equipment is in the RRC idle state.

Optionally, when the RRC state of the terminal device is the RRC idle state, the response message is an RRC establishment message or an RRC rejection message. For example, if the terminal device sends an RRC establishment request message to the base station, the terminal device receives a response message sent by the base station as an RRC setup (RRCSetup) message or an RRC rejection (RRCReject) message.

In the following, the process of receiving the response message by the terminal device in this case will be described with reference to FIG. 4 .

FIG. 4 is a schematic diagram of a process of receiving a response message provided by an embodiment of the present application. In the embodiment shown in FIG. 4, the RRC state of the terminal device is the RRC idle state. Please refer to FIG. 4, including the network device and the terminal device. The terminal device sends an RRC establishment request message to the network device, and after receiving the RRC establishment request message of the terminal device, the network device may send an RRC establishment message or an RRC rejection message to the terminal device.

Case 2: The terminal equipment is in the RRC inactive state.

Optionally, when the RRC state of the terminal device is the RRC inactive state, the response message is an RRC resume message, or an RRC reject message, or an RRC release message. For example, if the terminal device sends an RRC recovery request message to the base station, the response message sent by the base station to the terminal device is an RRC recovery message, or an RRC rejection message, or an RRC release message.

Next, with reference to FIG. 5 , the process of receiving the response message by the terminal device in this case will be described.

FIG. 5 is a schematic diagram of another process for receiving a response message provided by an embodiment of the present application. In the embodiment shown in FIG. 5, the RRC state of the terminal device is the RRC inactive state. Please refer to FIG. 5, including the network device and the terminal device. The terminal device sends an RRC recovery request message to the network device, and after receiving the RRC recovery request message from the terminal device, the network device may send an RRC establishment message, or an RRC rejection message, or an RRC release message to the terminal device.

S303. The terminal device performs RRC state transition according to the response message.

Optionally, the terminal device performs RRC state transition according to the response message, and there are two situations as follows:

Case 1: The terminal equipment is in the RRC idle state.

Optionally, when the RRC state of the terminal equipment is the RRC idle state, if the response message is an RRC setup message, the terminal equipment switches to the RRC connected state, and if the response message is an RRC rejection message, the terminal equipment resides in the RRC idle state . For example, when the RRC state of the terminal device is the RRC idle state, the terminal device sends an RRC establishment request message to the base station, and if the response message sent by the base station to the terminal device is an RRC establishment message, the terminal device switches the RRC idle state to the RRC connected state , if the response message sent by the base station to the terminal device is an RRC rejection message, the terminal device stays in the RRC idle state.

In the following, the RRC state transition process of the terminal device in this case will be described with reference to FIG. 6A-FIG. 6B.

FIG. 6A is a schematic diagram of an RRC state transition process provided by an embodiment of the present application. In the embodiment shown in FIG. 6A , the RRC state of the terminal device is the RRC idle state. Please refer to FIG. 6A , including the network device and the terminal device. The terminal device sends an RRC establishment request message to the network device. After the network device receives the RRC establishment request message of the terminal device, the response message sent to the terminal device is an RRC establishment message. The terminal device changes the RRC state of the terminal device from The RRC idle state is converted to the RRC connected state.

FIG. 6B is a schematic diagram of another RRC state transition process provided by the embodiment of the present application. In the embodiment shown in FIG. 6B, the RRC state of the terminal device is the RRC idle state. Please refer to FIG. 6B, including the network device and the terminal device. The terminal device sends an RRC establishment request message to the network device. After the network device receives the RRC establishment request message of the terminal device, the response message sent to the terminal device is an RRC rejection message, and the terminal device maintains the RRC state of the terminal device according to the RRC rejection message. RRC idle state.

Case 2: The terminal equipment is in the RRC inactive state.

When the RRC state of the terminal device is the RRC inactive state, if the response message is an RRC recovery message, the terminal device switches to the RRC connected state. For example, when the RRC state of the terminal device is inactive, the terminal device sends an RRC recovery request message to the base station, and if the response message sent by the base station to the terminal device is an RRC recovery message, the terminal device switches the RRC inactive state to the RRC connected state .

If the response message is an RRC rejection message, the terminal device switches to the RRC idle state. For example, when the RRC state of the terminal device is inactive, the terminal device sends an RRC recovery request message to the base station, and if the response message sent by the base station to the terminal device is an RRC rejection message, the terminal device switches the RRC inactive state to the RRC idle state .

If the response message is an RRC release message, when the configuration information is included in the RRC release message, the terminal device stays in the inactive state, and when the configuration information is not included in the RRC release message, the terminal device switches to the RRC idle state. Optionally, the configuration information includes information retained by the UE in the RRC inactive state, for example, the configuration information may include: inactive state radio network temporary identifier I-RNTI (Radio Network Temporary Identifier), RAN side paging cycle ran-PagingCycle, etc. one or more of them. For example, when the RRC state of the terminal device is RRC inactive, the terminal device sends an RRC recovery request message to the base station, if the response message sent by the base station to the terminal device is an RRC release message, and the RRC release message includes configuration information, the terminal The device stays in the inactive state, and if the response message sent by the base station to the terminal device is an RRC release message, and the RRC release message does not include configuration information, the terminal device switches the RRC inactive state to the RRC idle state.

In the following, the RRC state transition process of the terminal device in this case will be described with reference to FIG. 7A-FIG. 7D.

FIG. 7A is a schematic diagram of an RRC state transition process provided by an embodiment of the present application. In the embodiment shown in FIG. 7A , the RRC state of the terminal device is the RRC inactive state. Please refer to FIG. 7A , including the network device and the terminal device. The terminal device sends an RRC recovery request message to the network device. After the network device receives the RRC recovery request message of the terminal device, the response message sent to the terminal device is an RRC recovery message. The terminal device changes the RRC state of the terminal device from The RRC inactive state is converted to the RRC connected state.

FIG. 7B is a schematic diagram of another RRC state transition process provided by the embodiment of the present application. In the embodiment shown in FIG. 7B , the RRC state of the terminal device is the RRC inactive state. Please refer to FIG. 7B , including the network device and the terminal device. The terminal device sends an RRC recovery request message to the network device. After the network device receives the RRC recovery request message of the terminal device, the response message sent to the terminal device is an RRC rejection message. The terminal device changes the RRC state of the terminal device from The RRC inactive state is converted to the RRC idle state.

FIG. 7C is a schematic diagram of another RRC state transition process provided by the embodiment of the present application. In the embodiment shown in FIG. 7C , the RRC state of the terminal device is the RRC inactive state. Please refer to FIG. 7C , including the network device and the terminal device. The terminal device sends an RRC recovery request message to the network device. After the network device receives the RRC recovery request message of the terminal device, the response message sent to the terminal device is an RRC release message, and the release message includes configuration information. The terminal device releases the message according to the RRC release message. , keeping the terminal equipment in an RRC inactive state.

FIG. 7D is a schematic diagram of another RRC state transition process provided by the embodiment of the present application. In the embodiment shown in FIG. 7D, the RRC state of the terminal device is the RRC inactive state. Please refer to FIG. 7D, including the network device and the terminal device. The terminal device sends an RRC recovery request message to the network device. After the network device receives the RRC recovery request message of the terminal device, the response message sent to the terminal device is an RRC release message, and the release message does not include configuration information. message, transforming the RRC state of the terminal device from the RRC inactive state to the RRC idle state.

An embodiment of the present application provides a method for a terminal device to perform RRC state transition. The terminal device sends a request message to a base station, the terminal device receives a response message corresponding to the request message sent by the base station, and the terminal device performs RRC state transition according to the response message. In this way, the terminal device can flexibly adjust the RRC state of the terminal device according to the response message sent by the base station, thereby improving the flexibility of the terminal device in receiving multicast services.

On the basis of any one of the above embodiments, the process of the above state transition method will be described below with reference to FIG. 8 .

FIG. 8 is a schematic diagram of a state transition method provided by an embodiment of the present application. Please refer to Figure 8, including network equipment and terminal equipment. Wherein, the RRC state of the terminal equipment is the RRC idle state. The network device sends a paging message to the terminal device. Wherein, the paging message includes indication information, RRC connection state (target RRC state), and the identifier of the multicast service A.

Referring to FIG. 8 , when the network device sends the multicast service A to the terminal device, the terminal device switches the RRC state from the RRC idle state to the RRC connected state, and receives the multicast service A in the RRC connected state. In this way, the terminal device can flexibly adjust the state of the RRC according to the indication information sent by the network device, and realize the transition of the RRC state, thereby improving the flexibility of the terminal device in receiving multicast services.

FIG. 9 is a schematic structural diagram of a state conversion device provided by an embodiment of the present application. Referring to Fig. 9, the state conversion device 10 includes a conversion module 11, wherein:

The conversion module 11 is used for, there is a terminal device in RRC idle state or RRC inactive state including multicast service, and when the terminal device meets the RRC state transition condition, the terminal device performs RRC state transition.

The RRC state transition timer of the terminal device times out.

In a possible implementation manner, the conversion module 11 is specifically used for:

The state conversion device provided in the embodiment of the present application can implement the technical solutions shown in the above method embodiments, and its implementation principles and beneficial effects are similar, and will not be repeated here.

The state conversion device shown in the embodiment of the present application may be a chip, a hardware module, a processor, and the like. Certainly, the state conversion device may be in other forms, which are not specifically limited in this embodiment of the present application.

FIG. 10 is a schematic structural diagram of another state conversion device provided by an embodiment of the present application. On the basis of the embodiment shown in FIG. 9 , please refer to FIG. 10 , the state conversion device 10 further includes a receiving module 12, and the receiving module 12 is used for:

In a possible implementation manner, the RRC message includes:

The request message is an RRC establishment request message;

The request message is an RRC recovery request message;

The terminal device is executing the multicast service; or,

The terminal device is to execute the multicast service.

FIG. 11 is a schematic diagram of a hardware structure of a terminal device provided by the present application. Referring to FIG. 11 , the terminal device 20 may include: a processor 21 and a memory 22, wherein the processor 21 and the memory 22 can communicate; exemplary, the processor 21 and the memory 22 communicate through a communication bus 23, and the memory 22 It is used to store program instructions, and the processor 21 is used to call the program instructions in the memory to execute the state transition method shown in any of the above method embodiments.

Optionally, the terminal device 20 may further include a communication interface, and the communication interface may include a transmitter and/or a receiver.

Optionally, the above-mentioned processor can be a central processing unit (Central Processing Unit, CPU), and can also be other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC )wait. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like. The steps of the methods disclosed in this application can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor.

An embodiment of the present application provides a readable storage medium, on which a computer program is stored; the computer program is used to implement the state transition method as described in any of the foregoing embodiments.

An embodiment of the present application provides a computer program product, where the computer program product includes an instruction, and when the instruction is executed, causes the computer to execute the above state transition method.

All or part of the steps for implementing the above method embodiments can be completed by program instructions and related hardware. The aforementioned program can be stored in a readable memory. When the program is executed, it executes the steps comprising the above-mentioned method embodiments; and the aforementioned memory (storage medium) includes: read-only memory (English: read-only memory, abbreviated: ROM), RAM, flash memory, hard disk, Solid state drive, magnetic tape (English: magnetic tape), floppy disk (English: floppy disk), optical disc (English: optical disc) and any combination thereof.

Embodiments of the present application are described with reference to flowcharts and/or block diagrams of methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or other programmable terminal processing unit to produce a machine such that the instructions executed by the computer or other programmable terminal processing unit produce instructions for implementing Means for specifying functions in one or more steps of a flowchart and/or one or more blocks of a block diagram.

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

These computer program instructions can also be loaded into a computer or other programmable terminal equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so that the instructions executed on the computer or other programmable equipment Steps are provided for implementing the functions specified in the flow chart or flow charts and/or block diagram block or blocks.

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

In this application, the term "include" and its variants may mean non-limiting inclusion; the term "or" and its variants may mean "and/or". The terms "first", "second", etc. in this application are used to distinguish similar objects, and not necessarily used to describe a specific order or sequence. In the present application, "plurality" means two or more. "And/or" describes the association relationship of associated objects, indicating that there may be three types of relationships, for example, A and/or B may indicate: A exists alone, A and B exist simultaneously, and B exists independently. The character "/" generally indicates that the contextual objects are an "or" relationship.

Claims

A state transition method, characterized in that, comprising:

There is a terminal device in the RRC idle state or the RRC inactive state including the multicast service, and when the terminal device satisfies the RRC state transition condition, the terminal device performs the RRC state transition.
The method according to claim 1, wherein the RRC state transition condition includes at least one of the following:

receiving indication information sent by the base station, where the indication information is used to instruct the terminal device to perform RRC state transition;

The data packets that the terminal device fails to receive in the RRC idle state or in the inactive state meet a preset condition;

The RRC state transition timer of the terminal device times out.
The method according to claim 2, wherein receiving the indication information sent by the base station comprises:

Receive a paging message sent by the base station, where the paging message includes the indication information.
The method according to claim 3, wherein the paging message further includes a target RRC state, and the target RRC state is the RRC state after the RRC state transition of the terminal equipment.
The method according to claim 3 or 4, wherein the paging message further includes the identifier of the first multicast service, and the terminal equipment receiving or waiting to receive the first multicast service uses the indication information ; The indication information is used to instruct the terminal device to perform RRC state transition when it is receiving or waiting to receive the first multicast service in the RRC idle state or inactive state.
The method according to any one of claims 2-5, wherein the preset conditions include at least one of the following:

The number of data packets that the terminal device fails to receive in the RRC idle state or the inactive state is greater than or equal to a first threshold;

The ratio of the terminal device failing to receive data packets in the RRC idle state or in the inactive state is greater than or equal to a second threshold;

The number of data packets that the terminal device fails to receive continuously in the RRC idle state or in the inactive state is greater than or equal to a third threshold;

A ratio of data packets that the terminal device fails to continuously receive in the RRC idle state or in the inactive state is greater than or equal to a fourth threshold.
The method according to any one of claims 2-6, wherein the method further comprises:

The terminal device receives the RRC message sent by the base station, and the RRC message includes the RRC state transition timer.
The method according to claim 7, wherein the RRC message comprises:

The second multicast service, the RRC state transition timer is associated with the second multicast service, and when the terminal device receives the second multicast service or receives the second multicast service after a preset period of time, the terminal device starts the The RRC state transition timer described above.
The method according to claim 7 or 8, wherein the RRC message includes at least one of the following:

RRC rejection message, RRC release message, RRC establishment message, RRC recovery message, RRC reconfiguration message.
The method according to any one of claims 1-9, wherein the terminal device performing RRC state transition includes:

The terminal device sends a request message to the base station, the request message includes a cause value, and the cause value is the reception of the multicast service;

The terminal device receives a response message corresponding to the request message sent by the base station;

The terminal device performs RRC state transition according to the response message.
The method according to claim 10, wherein the terminal equipment is in the RRC idle state;

The request message is an RRC establishment request message;

The response message is an RRC establishment message or an RRC rejection message.
The method according to claim 11, wherein the terminal device performs RRC state transition according to the response message, comprising:

If the response message is an RRC establishment message, the terminal device switches to an RRC connection state;

If the response message is an RRC rejection message, the terminal device resides in the RRC idle state.
The method according to claim 10, wherein the terminal device is in the inactive state;

The request message is an RRC recovery request message;

The response message is an RRC resume message, or an RRC reject message, or an RRC release message.
The method according to claim 13, wherein the terminal device performs RRC state transition according to the response message, comprising:

If the response message is an RRC recovery message, the terminal device switches to an RRC connection state;

If the response message is an RRC rejection message, the terminal device switches to the RRC idle state;

If the response message is an RRC release message, when the RRC release message includes configuration information, the terminal device stays in the inactive state, and when the RRC release message does not include the configuration information, The terminal equipment switches to the RRC idle state.
The method according to any one of claims 1-14, wherein the terminal device has a multicast service, including:

The terminal device is executing the multicast service; or,

The terminal device is to execute the multicast service.
A state conversion device, characterized in that it includes a determination module and a conversion module, wherein:

The determining module is configured to, when the terminal device has a multicast service, determine the radio resource control RRC state of the terminal device;

The transition module is configured to, when the terminal equipment is in the RRC idle state or inactive state, and the terminal equipment satisfies the RRC state transition condition, the terminal equipment performs RRC state transition.
A terminal device, characterized in that it includes: a processor and a memory;

the memory stores computer-executable instructions;

The processor executes the computer-executable instructions stored in the memory, so that the processor executes the state transition method according to any one of claims 1-15.
A computer-readable storage medium, characterized in that, computer-executable instructions are stored in the computer-readable storage medium, and when the computer-executable instructions are executed by a processor, they are used to implement any one of claims 1-15 state transition method.
A computer program product, comprising a computer program, characterized in that, when the computer program is executed by a processor, the state transition method according to any one of claims 1-15 is realized.