WO2019128622A1

WO2019128622A1 - Communication method and device

Info

Publication number: WO2019128622A1
Application number: PCT/CN2018/118625
Authority: WO
Inventors: 李濛; 应江威; 李秉肇; 杨艳梅
Original assignee: 华为技术有限公司
Priority date: 2017-12-29
Filing date: 2018-11-30
Publication date: 2019-07-04
Also published as: CN109996327B; CN109996327A

Abstract

The present application relates to the field of communications. Disclosed are a communication method and device. The method comprises: a terminal device receives a period radio access network (RAN) notification region update monitoring timer duration from an RAN node; the terminal device obtains a target period registration update timer duration according to the period RAN notification region update monitoring timer duration and a configured period registration update timer duration, the target period registration update timer duration being used for setting a period registration update timer.

Description

Communication method and device

Technical field

The present application relates to the field of wireless communication technologies, and in particular, to a communication method and apparatus.

Background technique

A new state is introduced in the 5G communication system: radio resource control (RRC) inactive (RRC) inactive state. In this state, the terminal device and the core network (CN) are in a connection management (CM) state (CM-CONNECTED) state, and the CN does not sense the terminal device and the radio access network (radio access network, RAN) The nodes are in a disconnected state. Therefore, the terminal device and the access and mobility management function (AMF) node respectively use different timers to implement state transition of the terminal device to synchronize the state of the terminal device on the terminal device and the AMF node.

However, the state synchronization of the terminal device on the terminal device and the AMF node is not timely, which may result in low communication efficiency of the terminal device. Therefore, the above timer needs to be further optimized.

Summary of the invention

The embodiment of the present application provides a communication method, which can optimize the foregoing timer, and synchronize the state of the terminal device with the terminal device on the AMF node, thereby improving the communication efficiency of the terminal device.

In order to achieve the above object, the embodiment of the present application adopts the following technical solutions:

The first aspect provides a communication method, including: receiving, by a terminal device, a periodic RAN notification area update monitoring timer duration from a radio access network RAN node; and determining, by the terminal device, an area update monitoring timer duration according to the periodic RAN And a configured period registration update timer duration, obtaining a target period registration update timer duration, wherein the target period registration update timer duration is used to set a period registration update timer. The target period registration update timer duration may be a difference between the configured period registration update timer duration and the period RAN notification area update monitoring timer duration.

A second aspect provides a communication method, including: receiving, by a terminal device, a periodic RAN notification area update monitoring timer duration from a radio access network RAN node; and determining, by the terminal device, an area update monitoring timer duration according to the periodic RAN , set the initial value of the periodic registration update timer. The initial value may be a difference between the period of the periodic RAN notification area update monitoring timer, or the configured period registration update timer duration and the period RAN notification area update monitoring timer duration.

In a third aspect, a communication method is provided, comprising: an access and mobility management function AMF node receiving timer reference information from a radio access network RAN node, the timer reference information being a periodic RAN notification area update timer The duration, or the difference between the period RAN notification area update monitoring timer duration and the period RAN notification area update timer duration; the AMF node obtains the target mobile reachable timer duration according to the timer reference information, The target mobile reachable timer duration is used to set the mobile reachable timer. Specifically, the AMF node may obtain the target mobile reachable timer duration according to the timer reference information and the normal mobile reachable timer duration. For example, the target mobile reachable timer duration may be a difference between the normal mobile reachable timer duration and the timer reference information.

In a fourth aspect, a communication method is provided, including: an access and mobility management function AMF node receives timer reference information from a radio access network RAN node, and the timer reference information is a periodic RAN notification area update monitoring timing The duration of the period, the period RAN notifies the area update timer duration, or the difference between the period RAN notification area update monitoring timer duration and the period RAN notification area update timer duration; the AMF node sets according to the timer reference information The initial value of the mobile reachable timer. The initial value is the difference between the timer reference information, or the normal mobile reachable timer duration and the timer reference information.

In a fifth aspect, a communication method is provided, including: a radio access network RAN node obtains timer reference information, where the timer reference information is a periodic RAN notification area update timer duration, or a periodic RAN notification area update monitoring timer The difference between the duration and the period RAN notification area update timer duration; the RAN node sends the timer reference information to the access and mobility management function AMF node. The timer reference information may be used by the AMF node to set the mobile reachable timer, thereby making the unreachable time of the terminal device on the AMF node more reasonable.

With reference to the fifth aspect, in a possible design of the fifth aspect, the method further includes: the RAN node sending a periodic RAN notification area update monitoring timer duration to the terminal device. The period RAN notification area update monitoring timer duration is used by the terminal device to set the period registration update timer to solve the problem that the periodic registration update timer and the mobile reachable timer cannot be synchronized in time due to the elapsed time introduction.

In a sixth aspect, a communication method is provided, including: obtaining, by a RAN node of a radio access network, a duration of a periodic RAN notification area update monitoring timer; and sending, by the RAN node, a duration of the periodic RAN notification area update monitoring timer to a terminal device. The period of the periodic RAN notification area update monitoring timer is used by the terminal device to set the period registration update timer to solve the problem that the periodic registration update timer and the mobile reachable timer cannot be synchronized in time due to the elapsed time introduction.

According to a seventh aspect, a communication method is provided, including: obtaining, by a terminal device, a duration of a periodic radio access network RAN notification area update timer; and the terminal equipment registering an update according to the period RAN notification area update timer duration and configured period The timer duration is obtained, and the target period registration update timer duration is obtained, and the target period registration update timer duration is used to set the period registration update timer. The target period registration update timer duration may be a difference between the configured period registration update timer duration and the period RAN notification area update timer duration. The method can solve the problem that the periodic registration update timer and the mobile reachable timer cannot be synchronized in time due to the introduction of the elapsed time.

According to an eighth aspect, a communication method is provided, including: obtaining, by a terminal device, a duration of a periodic radio access network RAN notification area update timer; and the terminal device notifying the area update timer duration according to the period RAN, setting a period registration update timing The initial value of the device. The initial value may be a difference between the period RAN notification area update timer duration or the configured period registration update timer duration and the period RAN notification area update timer duration. The method can solve the problem that the periodic registration update timer and the mobile reachable timer cannot be synchronized in time due to the introduction of the elapsed time.

A ninth aspect provides a communication method, including: receiving, by a terminal device, a radio resource control RRC connection release message from a radio access network RAN node; and setting, by the terminal device, the terminal device according to the RRC connection release message a state; when the terminal device transitions from an RRC connected state to an RRC inactive state, the terminal device simultaneously starts a periodic RAN notification region update timer and a periodic registration update timer. The method can solve the problem that the periodic registration update timer and the mobile reachable timer cannot be synchronized in time due to the introduction of the elapsed time.

A tenth aspect provides a communication method, including: receiving, by a terminal device, a radio resource control RRC connection release message from a radio access network RAN node; and the terminal device simultaneously starting a periodic RAN notification area according to the RRC connection release message Update timer and cycle registration update timer. The method can solve the problem that the periodic registration update timer and the mobile reachable timer cannot be synchronized in time due to the introduction of the elapsed time.

In an eleventh aspect, there is provided a communication device comprising means or means for performing the various steps of the method of the above first aspect. The communication device can be a terminal device or can be at least one processing element or chip.

According to a twelfth aspect, there is provided a communication device comprising means or means for performing the various steps of the method of the above second aspect. The communication device can be a terminal device or can be at least one processing element or chip.

In a thirteenth aspect, there is provided a communication device comprising means or means for performing the various steps of the method of the above third aspect. The communication device can be an AMF node or can be at least one processing element or chip.

In a fourteenth aspect, there is provided a communication device comprising means or means for performing the various steps of the method of the above fourth aspect. The communication device can be an AMF node, such as an AMF, or it can be at least one processing element or chip.

In a fifteenth aspect, there is provided a communication device comprising means or means for performing the various steps in the method of the fifth or fifth aspect above. The communication device can be a RAN node or can be at least one processing element or chip.

In a sixteenth aspect, a communication apparatus is provided, comprising means or means for performing the various steps of the method of the above sixth aspect. The communication device can be a RAN node or can be at least one processing element or chip.

In a seventeenth aspect, there is provided a communication device comprising means or means for performing the various steps of the method of the above seventh aspect. The communication device can be a terminal device or can be at least one processing element or chip.

In a eighteenth aspect, there is provided a communication device comprising means or means for performing the various steps of the method of the above eighth aspect. The communication device can be a terminal device, such as an AMF, or it can be at least one processing element or chip.

In a nineteenth aspect, there is provided a communication device comprising means or means for performing the various steps of the method of the above ninth aspect. The communication device can be a terminal device or can be at least one processing element or chip.

In a twentieth aspect, there is provided a communication device comprising means or means for performing the various steps of the method of the above tenth aspect. The communication device can be a terminal device or can be at least one processing element or chip.

In a twenty-first aspect, a communication apparatus is provided, comprising a processor coupled to a memory, a memory for storing a program, and a processor calling a program stored in the memory to perform the method of the above first aspect. The communication device can be a terminal device or can be at least one processing element or chip.

A twenty-second aspect, a communication device is provided, comprising a processor coupled to a memory, a memory for storing a program, and a processor calling a program stored in the memory to perform the method of the above second aspect. The communication device can be a terminal device or can be at least one processing element or chip.

A twenty-third aspect, a communication device comprising a processor coupled to a memory, a memory for storing a program, and a processor calling a program stored in the memory to perform the method of the above third aspect. The communication device can be an AMF node or at least one processing element or chip.

According to a twenty-fourth aspect, there is provided a communication apparatus comprising a processor coupled to a memory, a memory for storing a program, and a processor calling a program stored in the memory to perform the method of the above fourth aspect. The communication device can be an AMF node or can be at least one processing element or chip.

A twenty-fifth aspect, a communication device comprising a processor coupled to a memory, a memory for storing a program, and a processor calling a program stored in the memory to perform the method of the above fifth aspect. The communication device can be a RAN node or can be at least one processing element or chip.

According to a twenty-sixth aspect, there is provided a communication apparatus comprising a processor coupled to a memory, a memory for storing a program, and a processor calling a program stored in the memory to perform the method of the sixth aspect above. The communication device can be a RAN node or can be at least one processing element or chip.

A twenty-seventh aspect, a communication device comprising a processor coupled to a memory, a memory for storing a program, and a processor calling a program stored in the memory to perform the method of the above seventh aspect. The communication device can be a terminal device or can be at least one processing element or chip.

In a twenty-eighth aspect, a communication apparatus is provided, comprising a processor coupled to a memory, a memory for storing a program, and a processor calling a program stored in the memory to perform the method of the above eighth aspect. The communication device can be a terminal device or can be at least one processing element or chip.

A twenty-ninth aspect, a communication device comprising a processor coupled to a memory, a memory for storing a program, and a processor calling a program stored in the memory to perform the method of the above ninth aspect. The communication device can be a terminal device or can be at least one processing element or chip.

In a thirtieth aspect, a communication apparatus is provided, comprising a processor coupled to a memory, a memory for storing a program, and a processor calling a program stored in the memory to perform the method of the above tenth aspect. The communication device can be a terminal device or can be at least one processing element or chip.

In a thirty-first aspect, there is provided a program for performing any of the methods of the above first aspect when executed by a processor.

A thirty-second aspect, a computer readable storage medium comprising the program of the thirty first aspect is provided.

In a thirty-third aspect, there is provided a program for performing any of the methods of the above second aspect when executed by a processor.

A thirty-fourth aspect, a computer readable storage medium comprising the program of the thirty-third aspect.

In a thirty-fifth aspect, there is provided a program for performing any of the methods of the above third aspect when executed by a processor.

A thirty-sixth aspect, a computer readable storage medium comprising the program of the thirty-fifth aspect is provided.

In a thirty-seventh aspect, a program is provided for performing any of the methods of the above fourth aspect when executed by a processor.

A thirty-eighth aspect, a computer readable storage medium comprising the program of the thirty-seventh aspect is provided.

In a thirty-ninth aspect, there is provided a program for performing any of the above fifth aspects when executed by a processor.

In a fortieth aspect, a computer readable storage medium comprising the program of the thirty-ninth aspect is provided.

In a forty-first aspect, there is provided a program for performing any of the methods of the above sixth aspect when executed by a processor.

A forty-second aspect, a computer readable storage medium comprising the program of the forty-first aspect is provided.

In a forty-third aspect, there is provided a program for performing any of the methods of the above seventh aspect when executed by a processor.

In a forty-fourth aspect, a computer readable storage medium comprising the program of the forty-third aspect is provided.

In a forty-fifth aspect, there is provided a program for performing any of the methods of the above eighth aspect when executed by a processor.

In a forty-sixth aspect, a computer readable storage medium comprising the program of the forty-fifth aspect is provided.

In a forty-seventh aspect, there is provided a program for performing the method of any of the above ninth aspects when executed by a processor.

In a forty-eighth aspect, a computer readable storage medium comprising the program of the forty-fifth aspect is provided.

In a forty-ninth aspect, there is provided a program for performing any of the above tenth aspects when executed by a processor.

According to a fiftieth aspect, a computer readable storage medium comprising the program of the forty-ninth aspect is provided.

DRAWINGS

1 is a schematic diagram of a network architecture provided by an embodiment of the present application;

2 is a schematic structural diagram of a communication system according to an embodiment of the present application;

3 is a schematic structural diagram of another communication system according to an embodiment of the present application;

4 is a flowchart of a communication method according to an embodiment of the present application;

FIG. 5 is a flowchart of still another communication method according to an embodiment of the present application;

FIG. 6 is a flowchart of still another communication method according to an embodiment of the present application;

FIG. 7 is a flowchart of still another communication method according to an embodiment of the present application;

FIG. 8 is a flowchart of still another communication method according to an embodiment of the present application;

FIG. 8a is a flowchart of still another communication method according to an embodiment of the present application;

FIG. 9 is a flowchart of still another communication method according to an embodiment of the present application;

FIG. 10 is a flowchart of still another communication method according to an embodiment of the present application;

FIG. 11 is a flowchart of still another communication method according to an embodiment of the present application;

FIG. 12 is a flowchart of still another communication method according to an embodiment of the present application;

FIG. 13 is a flowchart of another communication method according to an embodiment of the present application;

FIG. 14 is a flowchart of another communication method according to an embodiment of the present application;

FIG. 15 is a flowchart of another communication method according to an embodiment of the present application;

FIG. 16 is a flowchart of another communication method according to an embodiment of the present application;

FIG. 17 is a schematic structural diagram of a communication apparatus according to an embodiment of the present application;

FIG. 18 is a schematic structural diagram of still another communication apparatus according to an embodiment of the present application;

FIG. 19 is a schematic structural diagram of still another communication apparatus according to an embodiment of the present application;

FIG. 20 is a schematic structural diagram of still another communication apparatus according to an embodiment of the present application;

FIG. 21 is a schematic structural diagram of still another communication apparatus according to an embodiment of the present application;

FIG. 22 is a schematic structural diagram of still another communication apparatus according to an embodiment of the present application;

FIG. 23 is a schematic structural diagram of still another communication apparatus according to an embodiment of the present application;

24 is a schematic structural diagram of still another communication apparatus according to an embodiment of the present application;

FIG. 25 is a schematic structural diagram of still another communication apparatus according to an embodiment of the present application;

FIG. 26 is a schematic structural diagram of still another communication apparatus according to an embodiment of the present application;

FIG. 27 is a schematic structural diagram of still another communication apparatus according to an embodiment of the present application.

Detailed ways

The system architecture and the service scenario described in this application are for the purpose of more clearly explaining the technical solutions of the present application, and do not constitute a limitation on the technical solutions provided by the present application. Those skilled in the art may know that with the evolution of the system architecture and new services. The appearance of the scenario, the technical solution provided by the present application is equally applicable to similar technical problems.

It should be noted that, in the present application, the words "exemplary" or "such as" are used to mean an example, illustration, or illustration. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of the words "exemplary" or "such as" is intended to present the concepts in a particular manner.

In the present application, "corresponding, relating" and "corresponding" may sometimes be mixed, and it should be noted that the meanings to be expressed are not consistent when the distinction is not emphasized.

As shown in FIG. 1, FIG. 1 is a network structure that can be applied to a 5G communication system. The following briefly describes the various components of the network structure as follows:

Terminal device: may include various handheld devices with wireless communication functions, in-vehicle devices, wearable devices, computing devices or other processing devices connected to a wireless modem, and various forms of terminals, mobile stations (MS), Terminal, user equipment (UE), soft terminal, etc., such as water meters, electricity meters, sensors, and the like.

RAN node: used to manage radio resources, provide access services for terminal devices, and then complete control signal and user data forwarding between the terminal device and the core network, provide network access functions for authorized users in specific areas, and can be based on users. Levels, business needs, etc. use different quality transport tunnels. For example, NG-RAN in a 5G system.

AMF node: responsible for mobility management and access management, etc., can be used to implement functions other than session management in the mobility management entity (MME) function, such as lawful interception and access authorization.

Session management function (SMF) node: used to establish a session for a terminal device, assign a session identifier (ID), manage and assign a network Internet Protocol (IP) address of the terminal device, and manage or terminate the session.

Data Network (DN): A network used to provide external data, such as an Internet network.

Control Plane Function (CPF) node: mainly used for access control and mobility management functions (such as AMF functions) for authentication, encryption, and location registration of terminal devices, and establishment of user plane transmission paths, Session management functions such as release and change (such as the functionality of SMF). From the perspective of convenient understanding, it can be considered that the CPF node is a collection of network elements including an AMF node and an SMF node, and is not limited.

User Plane Function (UPF) node: The main functions include packet routing and forwarding, and quality of service (QoS) processing of user plane data.

The N2 interface is a reference point of the RAN node and the AMF node, and is used for sending a non-access stratum (NAS) message.

The N3 interface is a reference point between the RAN node and the UPF node, and is used for transmitting data of the user plane.

The N4 interface is a reference point between the SMF node and the UPF node, and is used for transmitting information such as tunnel identification information, data cache indication information, and downlink data notification message of the N3 connection.

The N6 interface is a reference point between the UPF node and the DN node, and is used to transmit data of the user plane.

The N1 interface is a reference point between the terminal device and the AMF node, and is used for sending a non-access stratum message.

For the sake of easy understanding, the related technologies related to this application are introduced:

CM-CONNECTED state: including RRC CONNECTED state, and RRC Inactive state. When the terminal device is in the CM-CONNECTED state, the terminal device and the AMF node have a NAS signaling connection on the N1 interface.

CM-IDLE state: When the terminal device is in the CM-IDLE state, the terminal device and the AMF node do not have a NAS signaling connection on the N1 interface. At the same time, there is no access signal connection (AN Signalling connection) between the terminal device and the RAN node. There is no N2 connection between the RAN node and the AMF node, and there is no N3 connection between the RAN node and the UPF node.

As shown in FIG. 2, FIG. 2 is a schematic diagram of a simplified communication system. When a terminal device needs to exchange data with a core network, the terminal device is in an RRC connected state, and the RAN node and the CPF node are connected through an N2 interface. The RAN node and the UPF are connected through an N3 interface. When the terminal device is in the RRC connected state, the RAN node can sense the cell where the terminal device resides and the location information of the terminal device, and the network element (for example, the AMF node) in the CPF node can sense the RAN node to which the terminal device is connected. In FIG. 2, when the downlink data in the DN is transmitted to the UPF node, the UPF node may send the downlink data to the RAN node connected to the terminal device, and then the downlink data is sent by the RAN node to the terminal device.

When the terminal device in the RRC connected state has no data transmission for a preset time length, the RAN node determines whether the terminal device should be switched from the RRC connected state to the RRC Inactive state according to the preset policy, when the terminal device is in the RRC Inactive state. As shown in FIG. 3, the RRC connection between the terminal device and the RAN node is released, and the N2 connection between the RAN node and the CPF node and the N3 connection between the RAN node and the UPF will be maintained.

Mobile reachable timer: Maintained by the AMF node to time the terminal device in the CM-IDLE state. For example, when the mobile reachable timer expires, the AMF node determines that the terminal device is unreachable and starts the implicit deregistration timer. At this time, the network side cannot page the terminal device. When the terminal device transitions to the CM-CONNECTED state, the AMF node stops the timer.

Implicit deregistration timer: When the mobile reachable timer on the AMF node side times out, the AMF node starts an implicit deregistration timer, where the length of the implicit deregistration timer depends on the implementation of the terminal device. When the implicit deregistration timer expires, the AMF node initiates a deregistration process for the terminal device.

Periodic registration update timer: Maintained by the terminal device to time the terminal device in the CM-IDLE state. For example, when the periodic registration update timer expires, the terminal device initiates a registration process of the type "periodic registration update", in which the terminal device transitions to the CM-CONNECTED state.

The mobile reachable timer duration is similar to the duration of the periodic registration update timer, and the AMF node can set different durations according to different terminal devices. Normally, the mobile reachable timer is 4 minutes longer than the periodic registration update timer. The default duration of the Periodic registration update timer is 54 minutes.

The periodic RAN notification area update guard timer is maintained by the RAN node and used to time the terminal device in the RRC Inactive state. For example, when the timer expires, the state of the terminal device is converted to the CM-IDLE state.

The periodic RAN notification area update timer is used by the terminal device to time the terminal device in the RRC Inactive state. For example, when the timer expires, the state of the terminal device is converted to CM- IDLE state.

The period of the periodic RAN notification area update timer and the period RAN notification area update monitoring timer are similar, and the RAN may set different durations according to different terminal devices. Normally, the periodic RAN notification area update guard timer is slightly longer than the period of the periodic RAN Notification area update timer. Periodic RAN notification area The default duration of the update guard timer is approximately 30 minutes.

Elapsed time: The elapsed time from the last time the RAN node contacts the terminal device (eg, the RAN node sends an RRC Connection Release message to the terminal device, or an RRC Connection Recovery message, etc.). The elapsed time can be used to optimize the unreachable time of the terminal device on the AMF node, for example, to set the mobile reachable timer.

Exemplarily, after receiving the RRC connection release message from the RAN node, the terminal device converts its state to the RRC Inactive state, and the terminal device starts the period RAN notification area update timer. Period RAN notification area The update timer timeout triggers the terminal device to perform an RRC connection resume procedure. When the RRC connection resume procedure fails (for example, the RRC connection recovery request message fails to be sent), the terminal device transitions to the CM-IDLE state and starts the periodic registration update timer. When the AMF node learns that the terminal device is converted to the CM-IDLE state, the mobile reachable timer is started. When the mobile reachable timer expires, the AMF node determines that the terminal device is unreachable and cannot page the terminal device.

The inventor of the present application found that the introduction of the elapsed time causes the periodic registration update timer of the terminal device to be incapable of being synchronized with the mobile reachable timer of the AMF node, that is, the timeout timings of the two timers are different, resulting in the terminal device. The state is seriously out of synchronization on both devices, affecting the communication efficiency of the terminal device. Specifically, the duration of the mobile reachable timer on the AMF node is shortened due to the elapsed time. Based on the duration of the implicit deregistration timer and the length of the mobile reachable timer, the following two problems may occur:

In the case where the duration of the implicit deregistration timer is short (for example, the sum of the duration of the mobile reachable timer and the duration of the implicit deregistration timer is less than the duration of the periodic registration update timer), when the terminal device initiates the periodic registration update, the implicit deregistration timer of the AMF node has timed out. And has already registered the terminal device, causing the AMF node to receive the periodic registration update initiated by the deregistered terminal device, wasting signaling, and reducing the communication efficiency of the terminal device.

In the case where the duration of the implicit deregistration timer is long (for example, the sum of the duration of the mobile reachable timer and the duration of the implicit deregistration timer is greater than the duration of the periodic registration update timer), the AMF node confirms that the terminal device has timed out to the terminal device to initiate a periodic registration update on the mobile reachable timer. The time period is unreachable, and the paging of the terminal device is not initiated. However, the terminal device is substantially reachable during the time period, and the downlink data cannot be received in time when the terminal device is reachable. The communication efficiency of the terminal device is reduced.

The present application provides various implementation methods that have solved the above-discussed problems. For details, refer to the method embodiments described below.

It should be noted that the nouns and steps in the embodiments of the present application may be referred to and referenced. The same or the description is not repeated. The order of execution between the steps in the embodiments may be interchanged and not limited. The embodiments of the present application can be applied to a 5G communication system, and can also be applied to a subsequent evolved communication system, and are not limited.

In addition, the timer duration involved in the present application may refer to the length of time from the start of the timer to the timeout of the timer.

As shown in FIG. 4, an embodiment of the present application provides a communication method, which may be applied to the communication system shown in FIG. 1, and the method includes:

401. The terminal device receives a periodic RAN notification area update monitoring timer duration from the RAN node.

The periodic RAN notification area update monitoring timer duration may be referred to as a periodic RAN notification area update monitoring timer period or a timing duration, and may also be referred to as a periodic RAN notification area update monitoring timer value (periodic RAN notification area update) Guard timer value). Specifically, the period RAN notification area update monitoring timer duration may be a length of time, for example, 10 minutes, or may be information corresponding to the length of time, for example, a count value corresponding to the length of time, for example, corresponding to 10 minutes. The count value is 5.

In one example, when the periodic RAN notification area update monitoring timer is implemented by means of a counter, the count is incremented by 1 for 2 minutes, and if the counter counts to the count value 5 corresponding to the length of time, the timer expires.

The period of the periodic RAN notification area update monitoring timer may be used to set the period RAN notification area update monitoring timer. For example, the period RAN notification area update monitoring timer duration is the period RAN notification area update monitoring timer duration, that is, when the period RAN notification area update monitoring timer counts up to the period RAN notification area update monitoring timer duration, or after, the period RAN The notification area update monitoring timer expires, which in turn triggers the terminal device to perform the corresponding action.

402. The terminal device obtains a target period registration update timer duration according to the period RAN notification area update monitoring timer duration and the configured period registration update timer duration.

The period of the periodic registration update timer may also be referred to as a periodic registration update timer value.

The configured periodic registration update timer duration may refer to a period registration update timer duration configured by the AMF node to the terminal device.

The target period registration update timer duration may be used to set the period registration update timer, so that the length of the period registration update timer from the start to the timeout is the target period registration update timer duration. For example, set the period registration update timer duration to the target period registration update timer duration.

In one example, the target period registration update timer duration may be a difference between the configured period registration update timer duration and the period RAN notification area update monitoring timer duration. For example, the periodic registration update timer value minus the periodic RAN notification area update guard timer value.

The period of the periodic RAN notification area update monitoring timer may be carried in the RRC connection release message.

It should be noted that the obtaining in step 402 can be replaced by deduction. Alternatively, step 402 can be replaced by: the terminal device updates the monitoring timer duration according to the periodic RAN notification area, and updates the period registration update timer duration. The specific implementation is similar to the description in step 402 above, and details are not described herein again.

In the method provided by the foregoing embodiment, the terminal device receives the periodic RAN notification area update monitoring timer duration from the RAN node, and obtains the target period registration according to the period RAN notification area update monitoring timer duration and the configured periodic registration update timer duration. The update timer length can solve the problem that the periodic registration update timer of the terminal device introduced by the elapsed time and the mobile reachable timer of the AMF node cannot be synchronized in time, thereby synchronizing the state of the terminal device on the two devices, and improving the terminal device. Communication efficiency.

As shown in FIG. 5, the embodiment of the present application provides another communication method, which may be applied to the communication system shown in FIG. 1, and the method includes:

501. The terminal device receives a periodic RAN notification area update monitoring timer duration from the RAN node.

The duration of the periodic RAN notification area update monitoring timer may be carried in the RRC connection release message.

502. The terminal device sets an initial value of the periodic registration update timer according to the period RAN notification area update monitoring timer duration.

In an example, the initial value may be the duration of the periodic RAN notification area update monitoring timer, that is, the periodic registration update timer starts from the period of the periodic RAN notification area update monitoring timer, that is, the period RAN notification area update monitoring timer duration The initial value is counted until the periodic registration update timer expires or after the periodic registration update timer duration expires, and the periodic registration update timer expires.

In another example, the initial value may be a difference between a configured periodic registration update timer duration and a periodic RAN notification region update monitoring timer duration. Specifically, it is assumed that the periodic registration update timer is implemented by a countdown method, that is, counting down from the initial value. For example, the periodic registration update timer is implemented by a counter, and the counter is counted in a decreasing form from the initial value, when the counter counts to 0. When the timer expires. In this case, the initial value is the difference between the configured periodic registration update timer duration and the period RAN notification area update monitoring timer duration.

For the steps 501 and related terms, refer to the related description in step 401, and details are not described herein.

In the method provided by the foregoing embodiment, the terminal device receives the periodic RAN notification area update monitoring timer duration from the RAN node, and sets the initial value of the periodic registration update timer according to the periodic RAN notification area update monitoring timer duration, which can be solved by elapsed The time registration update timer of the terminal device introduced by the time and the mobile reachable timer of the AMF node cannot be synchronized in time, thereby synchronizing the state of the terminal device on the two devices, thereby improving the communication efficiency of the terminal device.

As shown in FIG. 6, the embodiment of the present application provides another communication method, which may be applied to the communication system shown in FIG. 1, and the method includes:

601. The AMF node receives timer reference information from the RAN node.

The timer reference information may be an elapsed time, or may be a period RAN notification area update timer duration, or a period RAN notification area update monitoring timer duration; the timer reference information may also be a periodic RAN notification area update monitoring timing. The difference between the duration of the period and the period of the periodic RAN notification area update timer, for example, the period RAN notification area update monitoring timer duration minus the period RAN notification area update timer duration is not limited.

The elapsed time may be the period RAN notification area update timer duration, or the period RAN notification area update monitoring timer duration, or the difference between the period RAN notification area update monitoring timer duration and the period RAN notification area update timer duration. , no restrictions.

602. The AMF node obtains a target mobile reachable timer duration according to the timer reference information.

The target mobile reachable timer duration can be used to set the mobile reachable timer, so that the length of the mobile reachable timer from the start to the timeout is the target mobile reachable timer duration. For example, the duration of the mobile reachable timer is set to be the target mobile reachable timer duration, that is, when the mobile reachable timer reaches the target mobile reachable timer duration, or after, the mobile reachable timer expires.

Specifically, the step 602 may include: obtaining, by the AMF node, the target mobile reachable timer duration according to the timer reference information and the normal mobile reachable timer duration.

The normal mobile reachable timer duration may be referred to as a normal mobile reachable timer value, or a normal mobile reachable timer period. Specifically, the normal mobile reachable timer duration may refer to an AMF node sensing. The length of time that the terminal device changes to the CM-IDLE state until the AMF node determines that the terminal device is unreachable. Specifically, it may be determined by the AMF node according to the duration of the periodic registration update timer allocated by the AMF node to the terminal device.

In an example, the target mobile reachable timer duration may be a difference between a normal mobile reachable timer duration and a timer reference information, for example, a normal mobile reachable timer duration minus a timer reference information.

It should be noted that the target mobile reachable timer duration and the normal mobile reachable timer duration may be the length of time, or may be the information corresponding to the length of time, for example, the count value corresponding to the length of time, as shown in FIG. 4 The related description in the embodiment is omitted and will not be described again.

Optionally, the obtaining in step 602 may be replaced by a derivation, or step 602 may be replaced by: the AMF node updating the mobile reachable timer duration according to the timer reference information, for example, the current mobile reachable timer duration is a duration A, The AMF node updates the mobile reachable timer duration according to the timer reference information to the duration B.

The timer reference information may be carried in an N2 UE context release request message.

In the method provided by the foregoing embodiment, the AMF node receives the timer reference information from the RAN node, and obtains the target mobile reachable timer duration according to the timer reference information, where the timer reference information is the periodic RAN notification area update timer. When the duration or the period of the RAN notification area update monitoring timer is long, the problem that the periodic registration update timer of the terminal device introduced by the elapsed time and the mobile reachable timer of the AMF node cannot be synchronized in time can be solved, thereby synchronizing the terminals on the two devices. The status of the device is improved, and the communication efficiency of the terminal device is improved. When the timer reference information is the difference between the period of the periodic RAN notification area update monitoring timer and the period of the periodic RAN notification area update timer, the terminal device is not modified. In this case, the periodic registration update timer of the terminal device and the mobile reachable timer of the AMF node are better synchronized in time, thereby synchronizing the state of the terminal device on the two devices in a more timely manner, and improving the communication efficiency of the terminal device.

As shown in FIG. 7, the embodiment of the present application provides another communication method, which may be applied to the communication system shown in FIG. 1, and the method includes:

701. The AMF node receives timer reference information from the RAN node.

For the reference information of the timer, refer to the related description in step 601, and details are not described herein.

702. The AMF node sets an initial value of the mobile reachable timer according to the foregoing timer reference information.

The initial value may be the timer reference information, or the difference between the normal mobile reachable timer duration and the timer reference information, for example, the normal mobile reachable timer duration minus the timer reference information, and the specific initial The setting of the value is similar to the implementation in step 502 and will not be described again.

In the method provided by the foregoing embodiment, the AMF node receives the timer reference information from the RAN node, and sets an initial value of the mobile reachable timer according to the timer reference information, where the timer reference information is a periodic RAN notification area. When the update timer duration or the periodic RAN notification area update monitoring timer duration, the problem that the periodic registration update timer of the terminal device introduced by the elapsed time and the mobile reachable timer of the AMF node cannot be synchronized in time can be solved, and then the two synchronizations are synchronized. The state of the terminal device on the device improves the communication efficiency of the terminal device. When the timer reference information is the difference between the period RAN notification area update monitoring timer duration and the period RAN notification area update timer duration, the time difference is not modified. In the case of the terminal device, the periodic registration update timer of the terminal device and the mobile reachable timer of the AMF node are better synchronized in time, thereby synchronizing the state of the terminal device on the two devices in a more timely manner, and improving the communication efficiency of the terminal device.

As shown in FIG. 8, the embodiment of the present application provides another communication method, which can be applied to the communication system shown in FIG. 1, and the method includes:

801. The RAN node obtains timer reference information.

The timer reference information may be a period RAN notification area update timer duration, or a period RAN notification area update monitoring timer duration, or a period RAN notification area update monitoring timer duration and a period RAN notification area update timer duration. The difference between, for example, the period RAN notification area update monitoring timer duration minus the period RAN notification area update timer duration.

802. The RAN node sends timer reference information to the AMF node.

The timer reference information may be used by the AMF node to set the mobile reachable timer. For example, to set the initial value or duration of the mobile reachable timer, refer to the embodiment shown in FIG. 6 or 7.

Optionally, the foregoing method further includes:

803. The RAN node sends a periodic RAN notification area update monitoring timer duration to the terminal device.

The period of the periodic RAN notification area update monitoring timer may be used by the terminal device to set the period registration update timer to solve the problem that the periodic registration update timer of the terminal device introduced by the elapsed time and the mobile reachable timer of the AMF node cannot be time-limited. The problem of synchronization.

Specifically, the period of the periodic RAN notification area update monitoring timer may be carried in the RRC connection release message.

It should be noted that the order of execution of the above steps may be adjusted and is not limited.

In the method provided by the foregoing embodiment, the RAN node obtains the timer reference information, and sends the timer reference information to the AMF node, so that the AMF node sets the mobile reachable timer according to the timer reference information, thereby making the terminal device unreachable on the AMF node. The time is more reasonable, and the communication efficiency of the terminal device is improved.

As shown in FIG. 8a, an embodiment of the present application provides another communication method, which may be applied to the communication system shown in FIG. 1, and the method includes:

801a. The RAN node obtains the period RAN notification area update monitoring timer duration.

The 802a and RAN nodes send the periodic RAN notification area update monitoring timer duration to the terminal device.

The period of the periodic RAN notification area update monitoring timer may be used by the terminal device to set the period registration update timer, which may be carried in the RRC connection release message.

In the method provided by the foregoing embodiment, the RAN node obtains the period RAN notification area update monitoring timer duration, and sends the period RAN notification area update monitoring timer duration to the terminal device, so that the terminal device notifies the area update monitoring timer duration according to the period RAN. The periodic registration update timer is set to solve the problem that the periodic registration update timer of the terminal device introduced by the elapsed time and the mobile reachable timer of the AMF node cannot be synchronized in time, and the communication efficiency of the terminal device is improved.

As shown in FIG. 9, the embodiment of the present application provides another communication method, which can be applied to the communication system shown in FIG. 1, and the method includes:

901. The terminal device obtains a period RAN notification area update timer duration.

The period of the periodic RAN notification area update timer may be referred to as a period RAN notification area update timer value or a period or a timing duration. Specifically, the period RAN notification area update timer duration may be a length of time, or may be information corresponding to the length of time, for example, a count value corresponding to the length of time. For reference, refer to the related description in the embodiment shown in FIG. No longer.

In addition, the period of the periodic RAN notification area update timer may be configured by the RAN node to the terminal device, for example, may be carried in the RRC connection release message, or may be pre-configured on the terminal device. Therefore, the obtaining in step 901 may be obtained from the memory of the terminal device, or may be obtained from the RAN node, and is not limited.

902. The terminal device obtains a target period registration update timer duration according to the period RAN notification area update timer duration and the configured period registration update timer duration.

The duration of the target period registration update timer may be used to set a period registration update timer. For example, setting the period registration update timer duration to the target period registration update timer duration, that is, the period of the periodic registration update timer from startup to timeout. The length is the target period registration update timer duration.

The duration of the target period registration update timer may be a difference between the configured period registration update timer duration and the period RAN notification area update timer duration, for example, the configured periodic registration update timer duration minus the period RAN notification. The area update timer duration.

For the configuration of the periodic registration update timer, refer to the related description in the embodiment shown in FIG. 4, and details are not described herein.

In the method provided by the foregoing embodiment, the terminal device obtains the duration of the periodic RAN notification area update timer, and obtains the target period registration update timer duration according to the period RAN notification area update timer duration and the configured period registration update timer duration. The problem that the periodic registration update timer of the terminal device introduced by the elapsed time and the mobile reachable timer of the AMF node cannot be synchronized in time can improve the communication efficiency of the terminal device.

As shown in FIG. 10, the embodiment of the present application provides another communication method, which may be applied to the communication system shown in FIG. 1, and the method includes:

1001. The terminal device obtains a period RAN notification area update timer duration.

The period of the periodic RAN notification area update timer, and the step 1001 can be referred to the related description in the embodiment shown in FIG. 9, and details are not described herein.

1002. The terminal device sets an initial value of the periodic registration update timer according to the period RAN notification area update timer duration.

The initial value may be a period RAN notification area update timer duration, or a difference between the configured period registration update timer duration and the period RAN notification area update timer duration, for example, the configured period registration update timer duration The period of the RAN notification area update timer is subtracted, and the setting of the specific initial value is similar to the implementation in step 502, and details are not described herein.

In the method provided by the foregoing embodiment, the terminal device obtains the period of the periodic RAN notification area update timer, and sets the initial value of the period registration update timer according to the period RAN notification area update timer duration, and solves the terminal device introduced by the elapsed time. The periodic registration update timer and the AMF node's mobile reachable timer cannot be synchronized in time, thereby improving the communication efficiency of the terminal device.

As shown in FIG. 11, the embodiment of the present application provides another communication method, which may be applied to the communication system shown in FIG. 1, and the method includes:

1101. The terminal device receives an RRC connection release message from the RAN node.

The RRC connection release message may carry a periodic RAN notification area update timer duration, and the period RAN notification area update timer duration may be configured by the RAN node to the terminal device, which may be referred to as a configured periodic RAN notification area update timer duration.

1102. The terminal device sets a state of the terminal device according to the RRC connection release message.

In one example, when the terminal device receives the RRC Connection Release message, the terminal device transitions from the RRC connected state to the RRC inactive state.

1103. When the terminal device transitions from the RRC connected state to the RRC inactive state, the terminal device simultaneously starts the periodic RAN notification region update timer and the periodic registration update timer.

The period of the periodic RAN notification area update timer is the configured period RAN notification area update timer duration. For example, the RAN node is configured to the terminal device, and the period RAN notification area update timer can start timing from 0. The periodicity of the periodic registration update timer is the configured periodic registration update timer duration. For example, the AMF node is configured to the terminal device, and the periodic registration update timer can be timed from 0.

It should be noted that at the same time, it can be referred to at the same time, or the start time difference between the two is less than the preset value, or the start time difference between the two is negligible compared to the two timer durations, and is not limited.

In the method provided by the foregoing embodiment, the terminal device receives the RRC connection release message from the RAN node, and sets the state of the terminal device according to the RRC connection release message. When the terminal device changes from the RRC connected state to the RRC inactive state, the terminal device simultaneously The startup period RAN notifies the area update timer and the periodic registration update timer, and solves the problem that the periodic registration update timer of the terminal device introduced by the elapsed time and the mobile reachable timer of the AMF node cannot be synchronized in time, thereby improving the terminal device. Communication efficiency.

As shown in FIG. 12, the embodiment of the present application provides another communication method, which may be applied to the communication system shown in FIG. 1, and the method includes:

1201. The terminal device receives an RRC connection release message from the RAN node.

1202. The terminal device starts the periodic RAN notification area update timer and the periodic registration update timer according to the RRC connection release message.

In one example, when the terminal device receives the RRC Connection Release message, the terminal device simultaneously starts the periodic RAN notification area update timer and the periodic registration update timer.

In another example, when the terminal device receives the RRC Connection Release message, the terminal device transitions from the RRC connected state to the RRC inactive state, and simultaneously initiates the periodic RAN notification region update timer and the periodic registration update timer.

It should be pointed out that at the same time, it can be referred to at the same time, or the difference between the two timers can be neglected and not limited.

The period of the periodic RAN notification area update timer is the configured period RAN notification area update timer duration. For example, the RAN node is configured to the terminal device, and the period RAN notification area update timer can start from 0. The periodic registration update timer duration is the configured periodic registration update timer duration. For example, the AMF node is configured to the terminal device, and the periodic registration update timer can be timed from 0.

In the method provided by the foregoing embodiment, the terminal device receives the RRC connection release message from the RAN node, and simultaneously starts the periodic RAN notification area update timer and the periodic registration update timer according to the RRC connection release message, and solves the terminal introduced by the elapsed time. The periodic registration update timer of the device and the mobile reachable timer of the AMF node cannot be synchronized in time, thereby improving the communication efficiency of the terminal device.

As shown in FIG. 13, the embodiment of the present application provides another communication method, which may be applied to the communication system shown in FIG. 1, and the method includes:

1301: When the RAN node releases the RRC connection with the terminal device, the RAN node sets the state of the terminal device to the RRC Inactive state, and starts the periodic RAN notification area update monitoring timer.

In one example, there is no data transmission between the terminal device and the RAN node within a preset time, and the RAN node can release its RRC connection with the terminal device.

1302: The RAN node sends an RRC connection release message to the terminal device.

The RRC connection release message carries the duration of the periodic RAN notification area update guard timer.

Optionally, the RRC connection release message further carries a timer duration of the RRC Inactive state configured for the terminal device, that is, a duration of the periodic RAN notification area update timer.

1303. When the terminal device receives the RRC connection release message, the terminal device enters an RRC Inactive state, and starts a periodic RAN notification area update timer.

The terminal device enters the RRC Inactive state to switch from the RRC connected state to the RRC Inactive state, or the terminal device enters the RRC Inactive state from the RRC connected state, which is not limited.

1304. When the periodic RAN notification area update timer expires, the terminal device sends an RRC Connection Resume Request message to the RAN node.

For example, if the signal strength of the terminal device is weak, or the transmission data is incorrect, the RRC connection recovery request message fails to be sent, the terminal device enters the CM-IDLE state, and starts the Periodic registration update timer, that is, step 1305 is performed.

For example, the terminal device determines that the RRC connection recovery request message fails to be sent according to the following: the terminal device does not receive the message that is sent by the RAN node to confirm the RRC connection recovery, or is the RRC of the terminal device, in the preset time period. The protocol stack of the lower layer of the layer does not receive the RAN in the corresponding protocol stack for a preset period of time (for example, Packet Data Convergence Protocol (PDCP) layer or Radio Link Control (RLC)). The layer sends a confirmation message, which in turn informs the RRC layer and other methods, and is not limited.

1305. When the RRC connection recovery request message fails to be sent, the terminal device enters a CM-IDLE state, and starts a periodic registration update timer.

Optionally, the duration of the periodic registration update timer is calculated according to the duration of the periodic RAN notification area update monitoring timer. For details, refer to the related description in the embodiment shown in FIG. Specifically, it may be calculated when receiving the period RAN notification area update monitoring timer duration, or may not be limited before starting the period registration update timer.

In one example, the periodic registration update timer duration initiated in step 1305 = the periodic registration update timer duration configured by the AMF node for the terminal device - the periodic RAN notification region update monitoring timer duration.

Optionally, the initial value of the periodic registration update timer is set according to the duration of the periodic RAN notification area update monitoring timer. For details, refer to the related description in the embodiment shown in FIG. 5, and details are not described herein.

For the RAN node, if the RRC connection recovery request message sent by the terminal device is not received when the periodic RAN notification area update monitoring timer expires, the RAN node initiates an AN release process, that is, step 1306 is performed.

1306. The RAN node sends an N2 UE Context Release Request message to the AMF node, where the message includes timer reference information.

The timer reference information may be the duration of the periodic RAN notification area update monitoring timer.

1307. The AMF node derives a mobile reachable timer duration according to the timer reference information.

In one example, the mobile reachable timer duration used by the AMF node = the normal mobile reachable timer value of the AMF node (the normal mobile reachable timer value) - the periodic RAN notification area update monitoring timer duration.

Alternatively, step 1307 is: the AMF node sets the initial value of the mobile reachable timer according to the timer reference information, which is similar to the method in the embodiment shown in FIG. 5, and is not described again.

In the method provided by the foregoing embodiment, the terminal device sets the periodic registration update timer according to the periodic RAN notification area update monitoring timer duration, and solves the periodic registration update timer of the terminal device introduced by the elapsed time and the mobile reachable timer of the AMF node. The problem that the time cannot be synchronized, thereby synchronizing the state of the terminal devices on the two devices, and improving the communication efficiency of the terminal devices.

As shown in FIG. 14, the embodiment of the present application provides another communication method, which can be applied to the communication system shown in FIG. 1, and the method includes:

1401: When the RAN node releases the RRC connection with the terminal device, the RAN node sets the state of the terminal device to the RRC Inactive state, and starts the periodic RAN notification area update monitoring timer.

For example, there is no data transmission between the terminal device and the RAN node within a certain period of time, and the RAN node can release its RRC connection with the terminal device.

1402: The RAN sends an RRC connection release message to the terminal device.

Optionally, the RRC connection release message carries a period RAN notification area update timer duration, where the period RAN notification area update timer duration may be configured by the RAN node for the terminal device.

1403. When the terminal device receives the RRC connection release message, the terminal device enters an RRC Inactive state, and starts a periodic RAN notification area update timer.

1404. When the periodic RAN notification area update timer expires, the terminal device sends an RRC connection recovery request message to the RAN node.

For example, if the signal strength of the terminal device is weak, or the transmission data is incorrect, the RRC connection recovery request message fails to be sent, the terminal device enters the CM-IDLE state, and starts the periodic registration update timer, that is, step 1405 is performed. Specifically, the RRC connection recovery request message is sent to the related description in the embodiment shown in FIG.

1405. When the RRC connection recovery request message fails to be sent, the terminal device enters a CM-IDLE state, and starts a periodic registration update timer.

Optionally, the period registration update timer duration is calculated according to the periodic RAN notification area update timer.

In one example, the periodic registration update timer duration initiated by the terminal device in step 1405 = the periodic registration update timer duration configured by the AMF node for the terminal device - the periodic RAN notification region update timer duration.

Optionally, the initial value of the periodic registration update timer is set according to the duration of the periodic RAN notification area update timer. For details, refer to the related description in the embodiment shown in FIG.

For the RAN node, when the periodic RAN notification area update monitoring timer expires, the RRC connection recovery request message sent by the terminal device is not received yet, and the RAN node initiates the AN release process, that is, step 1506 is performed.

1406. The RAN node sends an N2 UE Context Release Request message to the AMF node, where the message includes timer reference information.

The timer reference information may be the duration of the periodic RAN notification area update timer, or the period RAN notification area update monitoring timer duration. At this time, the timer reference information may also be referred to as an elapsed time.

1407. The AMF node derives a mobile reachable timer duration according to the timer reference information.

In one example, the mobile reachable timer duration that the AMF node actually uses = the AMF node's predetermined mobile reachable timer value (the normal mobile reachable timer value) - the timer reference information.

Alternatively, the step 1407 is: the AMF node sets the initial value of the mobile reachable timer according to the timer reference information, which is similar to the method in the embodiment shown in FIG. 5, and is not described again.

In the method provided by the foregoing embodiment, the terminal device registers the update timer according to the periodic RAN notification area update timer duration, and solves the periodic registration update timer of the terminal device introduced by the elapsed time and the mobile reachable timer of the AMF node. The problem that the time cannot be synchronized, thereby synchronizing the state of the terminal devices on the two devices, and improving the communication efficiency of the terminal devices.

It should be noted that the setting of the periodic registration update timer in step 1405 is based on the period RAN notification area update timer duration. The setting of the mobile reachable timer in step 1407 is based on the timer reference information, and the timer reference information is the periodic RAN notification. When the area update monitoring timer duration is different, the devices of the two timers are different according to the difference, but since the period of the periodic RAN notification area update timer is smaller than the period of the periodic RAN notification area update monitoring timer, the two timers can also be resolved. Problems that cannot be synchronized in time.

The embodiment of the present application provides another communication method, which can be applied to the communication system shown in FIG. 1, and the method includes the same steps as steps 1401-1407, with the following differences:

The duration of the Periodic registration update timer that is started in step 1405 is the duration of the Periodic registration update timer configured by the AMF node to the terminal device. In addition, the initial value of the timer is 0.

In addition, the timer reference information is a difference between a Period RAN notification area update guard timer duration and a Period RAN notification area update timer duration, for example, a Period RAN notification area update guard timer duration minus a Period RAN notification area update timer duration.

In the method provided by the foregoing embodiment, the mobile reachable timer is set by the AMF node according to the difference between the duration of the Periodic RAN notification area update guard timer and the duration of the Periodic RAN notification area update timer, so that the terminal device does not modify the terminal device. The periodic registration update timer and the mobile reachable timer of the AMF node are better synchronized in time, thereby synchronizing the state of the terminal devices on the two devices in a more timely manner, and improving the communication efficiency of the terminal device.

As shown in FIG. 15 , an embodiment of the present application provides another communication method, which may be applied to the communication system shown in FIG. 1 , where the method includes:

1501. When the RAN node releases the RRC connection with the terminal device, the RAN node sets the state of the terminal device to the RRC Inactive state, and starts the periodic RAN notification area update monitoring timer.

For example, there is no data transmission between the terminal device and the RAN node within a certain time, and the RAN node can release the RRC connection.

1502: The RAN node sends an RRC connection release message to the terminal device.

1503. The terminal device sets a state of the terminal device according to the RRC connection release message.

1504. When the terminal device transitions from the RRC connected state to the RRC inactive state, the terminal device simultaneously starts the periodic RAN notification area update timer and the periodic registration update timer.

1505. When the periodic RAN notification area update timer expires, the terminal device sends an RRC connection recovery request message to the RAN node.

For the RAN node, if the RRC connection recovery request message sent by the terminal device is not received when the periodic RAN notification area update monitoring timer expires, the RAN node initiates the AN release process, that is, step 1506 is performed.

1506. The RAN node sends an N2 UE Context Release Request message to the AMF node, where the message includes timer reference information.

The timer reference information may be a period RAN notification area update monitoring timer duration, or a period RAN notification area update timer duration.

1507. The AMF node derives a mobile reachable timer duration according to the timer reference information.

Alternatively, step 1507 is: the AMF node sets the initial value of the mobile reachable timer according to the timer reference information, which is similar to the method in the embodiment shown in FIG. 5, and is not described again.

It should be noted that the steps in the embodiment shown in FIG. 15 and the timers involved in the foregoing may refer to related descriptions in the embodiment shown in FIG.

In the method provided by the foregoing embodiment, the terminal device receives the RRC connection release message from the RAN node, and sets the state of the terminal device according to the RRC connection release message. When the terminal device changes from the RRC connected state to the RRC inactive state, the terminal device simultaneously The start period RAN notifies the area update timer and the period registration update timer to solve the problem that the periodic registration update timer of the terminal device introduced by the elapsed time and the mobile reachable timer of the AMF node cannot be synchronized in time, and the communication of the terminal device is improved. effectiveness.

As shown in FIG. 16, an embodiment of the present application provides a communication method, which may be applied to the communication system shown in FIG. 1, and the method includes:

Steps 1601-1602 are the same as steps 1501-1502, and steps 1605-1607 are the same as steps 1505-1507, and are not described again. In addition, the different steps are as follows.

1603. The terminal device starts the periodic RAN notification area update timer and the periodic registration update timer according to the RRC connection release message.

1604. The terminal device transitions from an RRC connected state to an RRC inactive state.

The steps 1603 and 1604 can be performed simultaneously, or can be sequentially adjusted, and are not limited.

In addition, the related descriptions in the embodiment shown in FIG. 12 can be referred to in step 1603 and the timers mentioned above, and details are not described herein again.

In the method provided by the foregoing embodiment, the terminal device receives the RRC connection release message from the RAN node, and starts the periodic RAN notification area update timer and the periodic registration update timer according to the RRC connection release message to solve the terminal introduced by the elapsed time. The periodic registration update timer of the device and the mobile reachable timer of the AMF node cannot be synchronized in time, and the communication efficiency of the terminal device is improved.

The solution provided by the embodiment of the present invention is mainly introduced from the perspectives of the terminal device, the RAN node, the AMF node, and the interaction thereof. It can be understood that the RAN node, the AMF node, and the terminal device all include hardware structures and/or software modules corresponding to each function. Those skilled in the art will readily appreciate that the present application can be implemented in a combination of hardware or hardware and computer software in combination with the elements and algorithm steps of the various examples described in the embodiments disclosed herein. Whether a function is implemented in hardware or computer software to drive hardware depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

The embodiment of the present application may divide the function module into the terminal device according to the foregoing method example. For example, each function module may be divided according to each function, or two or more functions may be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiments of the present application is schematic, and is only a logical function division, and may be further divided in actual implementation.

The embodiment of the present application provides a communication device, which can perform the method or action of the terminal device in the foregoing embodiment, for example, in the embodiment shown in FIG. 4 or FIG. method.

As shown in FIG. 17, a schematic structural diagram of a communication device is provided. The device may be a chip or system on a terminal device or a terminal device. The device includes a transceiver unit 1701 and a processing unit 1702.

The transceiver unit 1701 is configured to receive a periodic RAN notification area update monitoring timer duration from the radio access network RAN node;

The processing unit 1702 is configured to obtain a target period registration update timer duration according to the period RAN notification area update monitoring timer duration and the configured periodic registration update timer duration, where the target period registration update timer duration is used to set the period Register the update timer.

The target period registration update timer duration may be a difference between the configured period registration update timer duration and the period RAN notification area update monitoring timer duration.

Optionally, the period RAN notification area update monitoring timer duration is carried in the radio resource control RRC connection release message.

It should be noted that the transceiver unit may be replaced by a transceiver, such as a radio frequency module or an antenna, and the processing unit may be replaced by one or more processors, without limitation.

The apparatus provided by the foregoing embodiment obtains the target period registration update timer by receiving the periodic RAN notification area update monitoring timer duration from the RAN node, and according to the period RAN notification area update monitoring timer duration and the configured periodic registration update timer duration. The duration can solve the problem that the periodic registration update timer of the terminal device introduced by the elapsed time and the mobile reachable timer of the AMF node cannot be synchronized in time, thereby synchronizing the state of the terminal device on the two devices, and improving the communication efficiency of the terminal device.

As shown in FIG. 18, a schematic structural diagram of another communication apparatus is provided, which may be used to perform the action of the terminal device involved in the foregoing embodiment, and the device may be a chip or system on a terminal device or a terminal device. The device includes a transceiver unit 1801 and a processing unit 1802.

The transceiver unit 1801 is configured to receive a periodic RAN notification area update monitoring timer duration from the RAN node;

The processing unit 1802 is configured to set an initial value of the periodic registration update timer according to the period RAN notification area update monitoring timer duration.

Optionally, the initial value is a difference between the period of the periodic RAN notification area update monitoring timer, or the configured period registration update timer duration and the period RAN notification area update monitoring timer duration.

The apparatus provided by the foregoing embodiment can update the monitoring timer duration by receiving the periodic RAN notification area from the RAN node, and set the initial value of the periodic registration update timer according to the periodic RAN notification area update monitoring timer duration, which can be solved by the elapsed time. The periodic registration update timer of the terminal device and the mobile reachable timer of the AMF node cannot be synchronized in time, thereby synchronizing the state of the terminal device on the two devices, thereby improving the communication efficiency of the terminal device.

As shown in FIG. 19, a schematic structural diagram of still another communication apparatus is provided, which may be used to perform the action of the AMF node involved in the foregoing embodiment, and the apparatus may be a chip or system on a AMF node or an AMF node. The device includes a transceiver unit 1901 and a processing unit 1902.

The transceiver unit 1901 is configured to receive timer reference information from the RAN node, where the timer reference information is a period RAN notification area update timer duration, or a period RAN notification area update monitoring timer duration and a period RAN notification area update timer The difference between the durations;

The processing unit 1902 is configured to obtain, according to the timer reference information, a target mobile reachable timer duration, where the target mobile reachable timer duration is used to set a mobile reachable timer.

Optionally, the processing unit 1902 is further configured to: obtain the target mobile reachable timer duration according to the timer reference information and the normal mobile reachable timer duration.

Optionally, the target mobile reachable timer duration is a difference between the normal mobile reachable timer duration and the timer reference information.

Optionally, the timer reference information is carried in an N2 UE context release request message.

It should be noted that the transceiver unit can be replaced by a communication interface, which can communicate with the RAN node by wire or wirelessly, and the processing unit can be replaced by one or more processors, without limitation.

The apparatus provided by the foregoing embodiment, by receiving the timer reference information from the RAN node, and obtaining the target mobile reachable timer duration according to the timer reference information, where the timer reference information is the periodic RAN notification area update timer duration or When the periodic RAN notifies the area update monitoring timer, the problem that the periodic registration update timer of the terminal device introduced by the elapsed time and the mobile reachable timer of the AMF node cannot be synchronized in time can be solved, thereby synchronizing the terminal devices of the two devices. The state improves the communication efficiency of the terminal device; when the timer reference information is the difference between the period RAN notification area update monitoring timer duration and the period RAN notification area update timer duration, so that the terminal device is not modified. The periodic registration update timer of the terminal device is better synchronized with the mobile reachable timer of the AMF node in time, thereby synchronizing the state of the terminal device on the two devices in a more timely manner, and improving the communication efficiency of the terminal device.

As shown in FIG. 20, a schematic structural diagram of still another communication apparatus is provided, which may be used to perform the action of the AMF node involved in the above embodiment, and the apparatus may be a chip or a system on chip on an AMF node or an AMF node. The device includes a transceiver unit 2001 and a processing unit 2002.

The transceiver unit 2001 is configured to receive timer reference information from the RAN node, where the timer reference information is a period RAN notification area update monitoring timer duration, a period RAN notification area update timer duration, or a period RAN notification area update monitoring timing The difference between the duration of the timer and the duration of the periodic RAN notification area update timer;

The processing unit 2002 is configured to set an initial value of the mobile reachable timer according to the timer reference information.

Optionally, the initial value is the timer reference information, or a difference between a normal mobile reachable timer duration and the timer reference information.

Optionally, the timer reference information is carried in the N2 UE Context Release Request message.

It should be noted that the transceiver unit can be replaced with a communication interface, which can communicate with the AMF node by wire or wirelessly, and the processing unit can be replaced by one or more processors, without limitation.

The foregoing embodiment provides an apparatus, by receiving timer reference information from a RAN node, and setting an initial value of a mobile reachable timer according to the timer reference information, where the timer reference information is a periodic RAN notification area update timer. When the duration or the period of the RAN notification area update monitoring timer is long, the problem that the periodic registration update timer of the terminal device introduced by the elapsed time and the mobile reachable timer of the AMF node cannot be synchronized in time can be solved, thereby synchronizing the terminals on the two devices. The status of the device is improved, and the communication efficiency of the terminal device is improved. When the timer reference information is the difference between the period of the periodic RAN notification area update monitoring timer and the period of the periodic RAN notification area update timer, the terminal device is not modified. In this case, the periodic registration update timer of the terminal device and the mobile reachable timer of the AMF node are better synchronized in time, thereby synchronizing the state of the terminal device on the two devices in a more timely manner, and improving the communication efficiency of the terminal device.

As shown in FIG. 21, a schematic structural diagram of still another communication apparatus is provided. The apparatus may be used to perform the action of the RAN node involved in the foregoing embodiment, and the apparatus may be a chip or a system on a RAN node or a system on a RAN node. The device includes a processing unit 2101 and a transceiver unit 2102.

The processing unit 2101 is configured to obtain timer reference information, where the periodic radio access network RAN notifies the area update timer duration, or the period RAN notification area update monitoring timer duration and the period RAN notification area update timer The difference between the durations;

The transceiver unit 2102 is configured to send the timer reference information to the AMF node.

Optionally, the timer reference information is carried in a context release request message.

Optionally, the transceiver unit 2102 is further configured to: send the periodic RAN notification area update monitoring timer duration to the terminal device.

The apparatus provided by the foregoing embodiment obtains the timer reference information and sends the timer reference information to the AMF node, so that the AMF node sets the mobile reachable timer according to the timer reference information AMF node, thereby making the terminal device unreachable on the AMF node. The time is more reasonable, and the communication efficiency of the terminal device is improved.

As shown in FIG. 22, a schematic structural diagram of still another communication apparatus is provided, which may be used to perform the action of the RAN node involved in the foregoing embodiment, and the apparatus may be a chip or system on a RAN node or a RAN node. The device includes: an obtaining unit 2201 and a transceiver unit 2202.

The obtaining unit 2201 is configured to obtain a duration of the periodic radio access network RAN notification area update monitoring timer;

The transceiver unit 2202 is configured to send, to the terminal device, the duration of the periodic RAN notification area update monitoring timer.

Optionally, the period of the periodic RAN notification area update monitoring timer is carried in the RRC connection release message.

It should be noted that the transceiver unit can be replaced by a transceiver, for example, a radio frequency module or an antenna, and the obtaining unit can be replaced by one or more processors, which is not limited.

The foregoing embodiment provides an apparatus, by obtaining a periodic RAN notification area update monitoring timer duration, and sending a periodic RAN notification area update monitoring timer duration to the terminal device, so that the terminal device registers the period according to the periodic RAN notification area update monitoring timer duration setting period. The timer is updated to solve the problem that the periodic registration update timer of the terminal device introduced by the elapsed time and the mobile reachable timer of the AMF node cannot be synchronized in time, and the communication efficiency of the terminal device is improved.

As shown in FIG. 23, a schematic structural diagram of another communication device is provided, which may be used to perform the action of the terminal device involved in the foregoing embodiment, and the device may be a chip or system on a terminal device or a terminal device. The device includes: an obtaining unit 012301 and a processing unit 022302.

The obtaining unit 2301 is configured to obtain a period RAN notification area update timer duration;

The processing unit 2302 is further configured to obtain a target period registration update timer duration according to the period RAN notification area update timer duration and the configured period registration update timer duration, where the target period registration update timer duration is used to set the period Register the update timer.

Optionally, the target period registration update timer duration is a difference between the configured period registration update timer duration and the period RAN notification area update timer duration.

It should be noted that the obtaining unit may be replaced by a processor, and the processing unit may be replaced by one or more processors, which are not limited.

The apparatus provided by the foregoing embodiment obtains the duration of the period update registration timer according to the period RAN notification area update timer duration and the configured period registration update timer duration, and obtains the target period registration update timer duration, which is solved by The problem that the periodic registration update timer of the terminal device introduced by the elapsed time and the mobile reachable timer of the AMF node cannot be synchronized in time, thereby improving the communication efficiency of the terminal device.

As shown in FIG. 24, a schematic structural diagram of another communication device is provided, which may be used to perform the action of the terminal device involved in the foregoing embodiment, and the device may be a chip or system on a terminal device or a terminal device. The device includes an obtaining unit 2401 and a processing unit 2402.

The obtaining unit 2401 is configured to obtain a period of the periodic radio access network RAN notification area update timer;

The processing unit 2402 is configured to set an initial value of the periodic registration update timer according to the period RAN notification area update timer duration.

Optionally, the initial value is a difference between the period of the periodic RAN notification area update timer, or the configured period registration update timer duration and the period RAN notification area update timer duration.

The device provided by the foregoing embodiment solves the periodic registration of the terminal device introduced by elapsed time by obtaining the periodic RAN notification area update timer duration and setting the initial value of the periodic registration update timer according to the periodic RAN notification area update timer duration. The update timer and the mobile reachable timer of the AMF node cannot be synchronized in time, thereby improving the communication efficiency of the terminal device.

As shown in FIG. 25, a schematic structural diagram of still another communication device is provided, which may be used to perform the action of the terminal device involved in the foregoing embodiment, and the device may be a chip or system on a terminal device or a terminal device. The device includes a transceiver unit 2501 and a processing unit 2502.

The transceiver unit 2501 is configured to receive an RRC connection release message from the RAN node.

The processing unit 2502 is configured to set a state of the terminal device according to the RRC connection release message.

Optionally, the processing unit 2502 is further configured to: when the terminal device transitions from the RRC connected state to the RRC inactive state, simultaneously start the periodic RAN notification area update timer and the periodic registration update timer.

The apparatus provided by the foregoing embodiment, when receiving the RRC connection release message from the RAN node, and setting the state of the terminal device according to the RRC connection release message, when the terminal device transitions from the RRC connected state to the RRC inactive state, the terminal device starts the cycle at the same time. The RAN notifies the area update timer and the periodic registration update timer, and solves the problem that the periodic registration update timer of the terminal device introduced by the elapsed time and the mobile reachable timer of the AMF node cannot be synchronized in time, thereby improving the communication efficiency of the terminal device. .

As shown in FIG. 26, a schematic structural diagram of still another communication device is provided, which may be used to perform the action of the terminal device involved in the foregoing embodiment, and the device may be a chip or system on a terminal device or a terminal device. The device includes: a transceiver unit 2601 and a processing unit 2602.

The transceiver unit 2601 is configured to receive an RRC connection release message from the RAN node.

The processing unit 2602 is configured to start the periodic RAN notification area update timer and the periodic registration update timer according to the RRC connection release message.

It should be noted that the transceiver unit may be a transceiver, for example, a radio frequency module or an antenna, and the processing unit may be one or more processors, which are not limited.

The foregoing embodiment provides that, by receiving an RRC connection release message from a RAN node, and simultaneously starting a periodic RAN notification area update timer and a periodic registration update timer according to the RRC connection release message, the period of the terminal device introduced by elapsed time is solved. The registration update timer and the AMF node's mobile reachable timer cannot be synchronized in time, thereby improving the communication efficiency of the terminal device.

As shown in FIG. 27, another communication device is provided, which may include a processor 2701 and a communication interface 2702. The processor 2701 is coupled to a memory, and the processor 2701 is configured to call a program in the memory to perform the operations involved in the foregoing embodiments. Method of terminal device or RAN node or AMF node.

The processor 2701 may be one or more, may be a central processing unit (CPU), or may be an application specific integrated circuit (ASIC), or configured to implement the present invention. One or more integrated circuits of an embodiment of the invention. For example: one or more microprocessors (English: Digital Singnal Processor, DSP), or one or more Field Programmable Gate Arrays (FPGAs).

The communication interface 2702 is configured to communicate with the processor 2701.

Optionally, the communication device includes the foregoing memory 2703. The memory 2703 may be one or more, and may be a Read-Only Memory (ROM) or other type of static storage device that can store static information and instructions. Access memory (RAM) or other types of dynamic storage devices that can store information and instructions, or electrically erasable programmable read-only memory (EEPROM), read-only optical disk (Compact Disc Read-Only Memory, CD-ROM) or other optical disc storage, optical disc storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used Any other medium that carries or stores the desired program code in the form of an instruction or data structure and that can be accessed by a computer, but is not limited thereto.

The memory 2703 and the processor 2701 can communicate with each other through the communication interface 2702, which is not limited.

The embodiment of the present application provides a program for executing a method of a terminal device or a RAN node or an AMF node involved in the foregoing embodiments when executed by a processor.

The embodiment of the present application provides a computer readable storage medium, including the above program.

The embodiment of the present application provides a system, including: a RAN node and an AMF node. The RAN node and the AMF node may be used to perform corresponding actions in the foregoing method embodiments. Further, the foregoing system may further include a terminal device, and the terminal device may be used to perform corresponding actions in the foregoing method embodiments, and details are not described herein.

The steps of a method or algorithm described in connection with the present disclosure may be implemented in a hardware or may be implemented by a processor executing software instructions. The software instructions may be composed of corresponding software modules, which may be stored in a random access memory (RAM), a flash memory, a read only memory (ROM), an erasable programmable read only memory ( Erasable Programmable ROM (EPROM), electrically erasable programmable read only memory (EEPROM), registers, hard disk, removable hard disk, compact disk read only (CD-ROM) or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor to enable the processor to read information from, and write information to, the storage medium. Of course, the storage medium can also be an integral part of the processor. The processor and the storage medium can be located in an ASIC. Additionally, the ASIC can be located in a core network interface device. Of course, the processor and the storage medium may also exist as discrete components in the core network interface device.

In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical or otherwise.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present application can be implemented by means of software plus necessary general hardware, and of course, by hardware, but in many cases, the former is a better implementation. . Based on such understanding, the technical solution of the present application, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a readable storage medium, such as a floppy disk of a computer. A hard disk or optical disk, etc., includes instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present application.

Claims

A communication method, comprising:

Receiving, by the terminal device, a periodic RAN notification area update monitoring timer duration from the radio access network RAN node;

The terminal device obtains a target period registration update timer duration according to the period RAN notification area update monitoring timer duration and the configured period registration update timer duration, and the target period registration update timer duration is used to set a period registration update. Timer.
The communication method according to claim 1, wherein the target period registration update timer duration is a difference between the configured period registration update timer duration and the period RAN notification area update monitoring timer duration. value.
The communication method according to claim 1 or 2, wherein the period of the periodic RAN notification area update monitoring timer is carried in the radio resource control RRC connection release message.
A communication method, comprising:

Receiving, by the terminal device, a periodic RAN notification area update monitoring timer duration from the radio access network RAN node;

The terminal device sets an initial value of the periodic registration update timer according to the period RAN notification area update monitoring timer duration.
The communication method according to claim 4, wherein the initial value is the period RAN notification area update monitoring timer duration, or the configured periodic registration update timer duration and the periodic RAN notification area update monitoring timing The difference between the length of the device.
The communication method according to claim 4 or 5, wherein the period of the periodic RAN notification area update monitoring timer is carried in the radio resource control RRC connection release message.
A communication method, comprising:

The access and mobility management function AMF node receives timer reference information from a radio access network RAN node, the timer reference information is a periodic RAN notification area update timer duration, or a periodic RAN notification area update monitoring timer duration and The difference between the period RAN notification area update timer duration;

The AMF node obtains a target mobile reachable timer duration according to the timer reference information, and the target mobile reachable timer duration is used to set a mobile reachable timer.
The communication method according to claim 7, wherein the AMF node obtains a target mobile reachable timer duration according to the timer reference information, including:

The AMF node obtains the target mobile reachable timer duration according to the timer reference information and the normal mobile reachable timer duration.
The communication method according to claim 8, wherein the target mobile reachable timer duration is a difference between the normal mobile reachable timer duration and the timer reference information.
The communication method according to any one of claims 7-9, wherein the timer reference information is carried in an N2UE context release request message.
A communication method, comprising:

The access and mobility management function AMF node receives timer reference information from a radio access network RAN node, the timer reference information is a period RAN notification area update monitoring timer duration, a period RAN notification area update timer duration, or a difference between a period RAN notification area update monitoring timer duration and a period RAN notification area update timer duration;

The AMF node sets an initial value of the mobile reachable timer according to the timer reference information.
The communication method according to claim 11, wherein the initial value is the difference between the timer reference information, or a normal mobile reachable timer duration and the timer reference information.
The communication method according to claim 11 or 12, wherein the timer reference information is carried in an N2UE context release request message.
A communication method, comprising:

The radio access network RAN node obtains timer reference information, where the timer reference information is between the period RAN notification area update timer duration, or the period RAN notification area update monitoring timer duration and the period RAN notification area update timer duration. Difference

The RAN node sends the timer reference information to an access and mobility management function AMF node.
The communication method according to claim 14, wherein the timer reference information is carried in an N2UE context release request message.
The communication method according to claim 14 or 15, wherein the method further comprises:

The RAN node sends a periodic RAN notification area update monitoring timer duration to the terminal device.
The communication method according to claim 16, wherein the period of the periodic RAN notification area update monitoring timer is carried in a radio resource control RRC connection release message.
A communication method, comprising:

The radio access network RAN node obtains the period RAN notification area update monitoring timer duration;

The RAN node sends the periodic RAN notification area update monitoring timer duration to the terminal device.
The communication method according to claim 18, wherein the period of the periodic RAN notification area update monitoring timer is carried in a radio resource control RRC connection release message.
A communication device, comprising:

a transceiver unit, configured to receive a periodic RAN notification area update monitoring timer duration from a radio access network RAN node;

a processing unit, configured to obtain a target period registration update timer duration according to the period RAN notification area update monitoring timer duration and the configured period registration update timer duration, where the target period registration update timer duration is used to set the period registration Update the timer.
The communication apparatus according to claim 20, wherein the target period registration update timer duration is a difference between the configured period registration update timer duration and the period RAN notification area update monitoring timer duration.
The communication apparatus according to claim 20 or 21, wherein the period of the periodic RAN notification area update monitoring timer is carried in the radio resource control RRC connection release message.
A communication device, comprising:

a transceiver unit, configured to receive a periodic RAN notification area update monitoring timer duration from a radio access network RAN node;

And a processing unit, configured to set an initial value of the periodic registration update timer according to the period RAN notification area update monitoring timer duration.
The communication device according to claim 23, wherein the initial value is a duration of the periodic RAN notification area update monitoring timer, or a configured periodic registration update timer duration and the periodic RAN notification area update monitoring timing The difference between the length of the device.
The communication apparatus according to claim 23 or 24, wherein the period of the periodic RAN notification area update monitoring timer is carried in a radio resource control RRC connection release message.
A communication device, comprising:

a transceiver unit, configured to receive timer reference information from a radio access network RAN node, where the timer reference information is a periodic RAN notification area update timer duration, or a periodic RAN notification area update monitoring timer duration and a periodic RAN notification area Update the difference between the timer durations;

The processing unit is configured to obtain a target mobile reachable timer duration according to the timer reference information, where the target mobile reachable timer duration is used to set a mobile reachable timer.
The communication device according to claim 26, wherein the processing unit is further configured to:

Obtaining the target mobile reachable timer duration according to the timer reference information and the normal mobile reachable timer duration.
The communication device according to claim 27, wherein the target mobile reachable timer duration is a difference between the normal mobile reachable timer duration and the timer reference information.
The communication device according to any one of claims 26 to 28, wherein the timer reference information is carried in an N2UE context release request message.
A communication device, comprising:

a transceiver unit, configured to receive timer reference information from a radio access network RAN node, where the timer reference information is a period RAN notification area update monitoring timer duration, a period RAN notification area update timer duration, or a periodic RAN notification area Updating the difference between the monitoring timer duration and the period of the periodic RAN notification area update timer;

And a processing unit, configured to set an initial value of the mobile reachable timer according to the timer reference information.
The communication device according to claim 30, wherein the initial value is the difference between the timer reference information, or a normal mobile reachable timer duration and the timer reference information.
The communication device according to claim 30 or 31, wherein the timer reference information is carried in an N2UE Context Release Request message.
A communication device, comprising:

a processing unit, configured to obtain timer reference information, where the periodic radio access network RAN notifies the area update timer duration, or the period RAN notification area update monitoring timer duration and the period RAN notification area update timer duration The difference between

And a transceiver unit, configured to send the timer reference information to an access and mobility management function AMF node.
The communication apparatus according to claim 33, wherein said timer reference information is carried in an N2UE context release request message.
The communication device according to claim 33 or 34, wherein the transceiver unit is further configured to:

The period RAN notification area update monitoring timer duration is sent to the terminal device.
The communication apparatus according to claim 35, wherein the period of the periodic RAN notification area update monitoring timer is carried in a radio resource control RRC connection release message.
A communication device, comprising:

An obtaining unit, configured to obtain a period of a periodic radio access network RAN notification area update monitoring timer;

And a transceiver unit, configured to send, to the terminal device, the duration of the periodic RAN notification area update monitoring timer.
The communication apparatus according to claim 37, wherein the period of the periodic RAN notification area update monitoring timer is carried in a radio resource control RRC connection release message.
A computer storage medium, characterized in that the computer storage medium stores a program, and when the program is executed, the steps of any one of claims 1 to 19 are performed.