CN117528670A

CN117528670A - Switching processing method, switching processing device, communication equipment and readable storage medium

Info

Publication number: CN117528670A
Application number: CN202210908443.5A
Authority: CN
Inventors: 张艳霞
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2022-07-29
Filing date: 2022-07-29
Publication date: 2024-02-06
Also published as: WO2024022388A1

Abstract

The application discloses a switching processing method, a device, a communication device and a readable storage medium, wherein the method comprises the following steps: under the condition that the source node provides the switching auxiliary information, the terminal processes the switching auxiliary information based on the AS security state; the switching auxiliary information comprises at least one of target cell configuration information and switching trigger event information, and is used for assisting the terminal to execute a switching process.

Description

Switching processing method, switching processing device, communication equipment and readable storage medium

Technical Field

The application belongs to the technical field of communication, and particularly relates to a switching processing method, a switching processing device, communication equipment and a readable storage medium.

Background

In a Non-terrestrial network (Non-Terrestrial Networks, NTN) scenario, since satellite movement may cause frequent service link (service link) and feeder link (feeder link) handover, all terminals (such as User Equipment (UE)) in the NTN cell need to perform the cell handover procedure frequently.

Disclosure of Invention

The embodiment of the application provides a handover processing method, a handover processing device, communication equipment and a readable storage medium, which solve the problem that a terminal is difficult to accurately judge how to execute a cell handover process.

In a first aspect, a handover processing method is provided, including:

under the condition that the source node provides the switching auxiliary information, the terminal processes the switching auxiliary information based on the AS security state of the access layer;

the switching auxiliary information comprises at least one of target cell configuration information and switching trigger event information, and is used for assisting the terminal to execute a switching process.

In a second aspect, a handover processing method is provided, the method including:

the target node responds to an RRC reestablishment process initiated by the terminal;

wherein the RRC reestablishment procedure is initiated by the terminal in case the AS security is not activated.

In a third aspect, a handover processing apparatus is provided, applied to a terminal, the apparatus including:

the first processing module is used for processing the switching auxiliary information based on the AS security state under the condition that the source node provides the switching auxiliary information;

In a fourth aspect, a handover processing apparatus is provided, for application to a target node, the apparatus comprising:

The second processing module is used for responding to the RRC reestablishment process initiated by the terminal;

In a fifth aspect, there is provided a communication device comprising: a processor, a memory and a program or instruction stored on the memory and executable on the processor, which when executed by the processor, implements the steps of the method according to the first or second aspect.

In a sixth aspect, there is provided a readable storage medium having stored thereon a program or instructions which when executed by a processor implement the steps of the method according to the first or second aspect.

In a seventh aspect, there is provided a chip comprising a processor and a communication interface coupled to the processor for running a program or instructions implementing the steps of the method according to the first or second aspect.

In an eighth aspect, there is provided a computer program/program product stored in a non-transitory storage medium, the program/program product being executed by at least one processor to implement the steps of the method as described in the first or second aspect.

A ninth aspect provides a communication system comprising a terminal for performing the steps of the method as described in the first aspect and a network device for performing the steps of the method as described in the second aspect.

In the embodiment of the application, under the condition that the source node provides the switching auxiliary information, the terminal can process the switching auxiliary information based on the AS security state, accurately determine the processing behavior of the switching auxiliary information, and further avoid executing unnecessary operations.

Drawings

FIG. 1 is a schematic diagram of a non-terrestrial network;

fig. 2 is one of flowcharts of a handover processing method provided in an embodiment of the present application;

FIG. 3 is a second flowchart of a handover processing method according to an embodiment of the present disclosure;

FIG. 4 is a third flowchart of a handover processing method according to an embodiment of the present disclosure;

fig. 5 is a schematic diagram of a switching processing device according to an embodiment of the present application;

FIG. 6 is a second schematic diagram of a switching device according to an embodiment of the present disclosure;

fig. 7 is a schematic diagram of a terminal provided in an embodiment of the present application;

fig. 8 is a schematic diagram of a network device according to an embodiment of the present application;

Fig. 9 is a schematic diagram of a communication device according to an embodiment of the present application.

Detailed Description

Technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application are within the scope of the protection of the present application.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or otherwise described herein, and that the terms "first" and "second" are generally intended to be used in a generic sense and not to limit the number of objects, for example, the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/" generally means a relationship in which the associated object is an "or" before and after.

It is noted that the techniques described in embodiments of the present application are not limited to long term evolution (Long Term Evolution, LTE)/LTE evolution (LTE-Advanced, LTE-a) systems, but may also be used in other wireless communication systems, such as code division multiple access (Code Division Multiple Access, CDMA), time division multiple access (Time Division Multiple Access, TDMA), frequency division multiple access (Frequency Division Multiple Access, FDMA), orthogonal frequency division multiple access (Orthogonal Frequency Division Multiple Access, OFDMA), single carrier frequency division multiple access (Single-carrier Frequency Division Multiple Access, SC-FDMA), and other systems. The terms "system" and "network" in embodiments of the present application are often used interchangeably, and the techniques described may be used for both the above-mentioned systems and radio technologies, as well as other systems and radio technologies. The following description describes a New air interface (NR) system for purposes of example and uses NR terminology in much of the description that follows, but these techniques are also applicable to applications other than NR system applications, such as generation 6 (6) ^th Generation, 6G) communicationThe system.

In order to facilitate understanding of the embodiments of the present application, the following technical points are described below:

1. Introduction to NTN (Non-terrestrial networks, non-terrestrial network)

A typical NTN deployment scenario is shown in fig. 1. In the related art, a terminal (e.g., a User Equipment (UE)), a gateway (or a base station), and a core network device are all deployed on the ground, and communication data between the terminal and the network device is transferred via an over-the-air satellite. Satellite-based non-terrestrial communication systems have a wider coverage range than terrestrial communication (terrestrial networks, TN) systems, and the number of subscribers served by NTN cells can be much greater than TN cells.

As shown in fig. 1, the link between the UE and the satellite is called a service link (service link), and the link between the satellite and the base station is called a feeder link (feeder link). In some scenarios (e.g., low Earth Orbit (LEO)), handoff of the service link and/or feeder link may occur due to satellite movement. For service link handoff, the serving satellite for all UEs within the cell needs to be handed off from one satellite to another. For feeder link handoff, a satellite needs to be handed off from one gateway (or base station) to another. In the related art, a cell handover procedure needs to be performed for all UEs of an NTN cell, regardless of service link handover or feeder link handover scenarios.

The terminal referred to in the present application may be a mobile phone, a tablet (Tablet Personal Computer), a Laptop (Laptop Computer) or a terminal-side Device called a notebook, a personal digital assistant (Personal Digital Assistant, PDA), a palm top, a netbook, an ultra-mobile personal Computer (ultra-mobile personal Computer, UMPC), a mobile internet appliance (Mobile Internet Device, MID), an augmented reality (augmented reality, AR)/Virtual Reality (VR) Device, a robot, a Wearable Device (weather Device), a vehicle-mounted Device (VUE), a pedestrian terminal (PUE), a smart home (home Device with a wireless communication function, such as a refrigerator, a television, a washing machine, or furniture, etc.), a game machine, a personal Computer (Personal Computer, PC), a teller machine, or a self-service machine, etc., and the Wearable Device includes: intelligent wrist-watch, intelligent bracelet, intelligent earphone, intelligent glasses, intelligent ornament (intelligent bracelet, intelligent ring, intelligent necklace, intelligent anklet, intelligent foot chain etc.), intelligent wrist strap, intelligent clothing etc.. In addition to the above terminal device, the terminal related to the present application may also be a Chip in the terminal, such as a Modem (Modem) Chip, a System on Chip (SoC). It should be noted that, the embodiment of the present application is not limited to a specific type of terminal.

The switching processing method, the device, the communication equipment and the readable storage medium provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.

Referring to fig. 2, an embodiment of the present application provides a handover processing method, which is applied to a terminal, and includes the specific steps: step 201.

Step 201: under the condition that the source node provides the switching auxiliary information, the terminal processes the switching auxiliary information based on the AS security state of the access layer;

Optionally, the target cell configuration information includes, but is not limited to, a resource configuration (e.g., random resource configuration) of the target cell, a location of the target cell, and the like. The target cell configuration information may be common configuration information (e.g., servingCellConfigCommon) of the cell, timer configuration information for switching to the target cell, and the like.

Optionally, the handover trigger event information includes, but is not limited to, a time event, a location event, and the like.

Optionally, the access stratum AS security state includes, but is not limited to, AS security inactive or AS security active.

The nodes referred to herein may comprise satellites or unmanned aerial vehicle systems, i.e., the source node may be a source satellite, the target node may be a target satellite, or the source node may be a source unmanned aerial vehicle system, and the target node may be a target unmanned aerial vehicle system.

In one embodiment of the present application, the handover assistance information is provided by a broadcast or multicast manner, that is, the source node may provide the handover assistance information to the terminal by a broadcast or multicast manner, and it may be understood that the handover assistance information is used to assist one or more terminals in the source serving cell to handover from the source serving cell to the target cell, where the source serving cell is a cell managed by the source node.

Since the coverage area served by the NTN cell is much larger than that of the terrestrial network (Terrestrial Networks, TN) cell, the number of users served thereby is also greater. In addition, because the parameters for switching are provided to the UE one-to-one by the network side at present, a great amount of system signaling overhead is generated in frequent switching, and in the embodiment of the present application, the switching auxiliary information is provided to the terminal by the source node through a broadcast or multicast mode, so that the system signaling overhead can be saved. Specifically, since multiple terminals may need to be switched from the source serving cell to the same target cell, the switching auxiliary information is provided by broadcasting or multicasting, so that the transmission of the same information can be reduced multiple times, and the system signaling overhead is further effectively reduced.

Alternatively, the AS security state, i.e. the security state of the AS, may comprise an active state and an inactive state.

In one embodiment of the present application, the terminal processing the handover assistance information based on the AS security status includes one or more of:

(1) Under the condition that AS security of the terminal is not activated, the terminal does not receive the switching auxiliary information;

that is, the terminal does not receive the handover assistance information until the AS security of the terminal is activated.

(2) The terminal receives the switching auxiliary information under the condition that AS security of the terminal is activated;

that is, the terminal receives the handover assistance information after AS security activation of the terminal.

(3) Under the condition that AS security of the terminal is not activated, the terminal does not apply the switching auxiliary information;

that is, the terminal does not apply the handover assistance information until the AS security of the terminal is activated. It will be appreciated that the terminal may receive the handover assistance information before the AS security of the terminal is activated, but the terminal will not apply the handover assistance information.

(4) The terminal applies the switching auxiliary information under the condition that AS security of the terminal is activated;

That is, the terminal applies the handover assistance information after AS security activation of the terminal. It will be appreciated that the terminal may receive the handover assistance information before the AS security of the terminal is activated, but the terminal will not apply the handover assistance information. And the terminal may apply the handover assistance information after AS security activation of the terminal.

(5) Under the condition that first indication information is received, the terminal applies the switching auxiliary information; wherein the first indication information is used for indicating (or configuring) the terminal to perform a handover procedure based on the handover assistance information.

Optionally, the first indication information is received in case the AS security of the terminal has been activated.

(1) Under the condition that AS security of the terminal is activated, the terminal executes a switching process based on the switching auxiliary information;

(2) And under the condition that AS security of the terminal is not activated, the terminal performs a cell selection or reselection process based on the handover auxiliary information.

In one embodiment of the present application, the terminal performing a cell selection or reselection procedure based on the handover assistance information includes:

And under the condition that the terminal knows the service stopping information of the source service cell of the terminal, the terminal performs a cell selection or reselection process based on the switching auxiliary information.

Optionally, when the source serving cell stops serving or the source serving cell is about to stop serving, the terminal performs a cell selection or reselection process based on the handover assistance information. It should be noted that, the terminal may consider that the serving cell will be out of service for a preset time before the serving cell is out of service. Illustratively, the source cell stops serving at time T1, and the terminal considers that the source cell will stop serving within the time T1-T-T1. Wherein, t can be set based on terminal implementation or can be configured by a network.

In one embodiment of the present application, the terminal performing a cell selection or reselection procedure based on the handover assistance information includes one or more of:

(1) Upon receiving a radio resource control (Radio Resource Control, RRC) release indication, the terminal returns to an idle state (idle) and performs a cell selection or reselection procedure based on the handover assistance information;

(2) Before or when the source service cell of the terminal stops serving, the terminal actively returns to an idle state and performs a cell selection or reselection process based on the switching auxiliary information;

(3) Before or when the source serving cell of the terminal is out of service, the terminal maintains a connected state and performs a cell selection or reselection procedure based on the handover assistance information.

In one embodiment of the present application, the terminal maintains a connection state and performs a cell selection or reselection procedure based on the handover assistance information, including:

the terminal selects a first target cell based on the handover assistance information;

and the terminal initiates an RRC reestablishment process through the first target cell.

In one embodiment of the present application, the terminal initiating the RRC reestablishment procedure through the first target cell includes:

the terminal provides second indication information for a target node, wherein the second indication information is used for indicating the reason of RRC reconstruction, and the target node is a network node to which the first target cell belongs. In one embodiment of the present application, the reason for the RRC reestablishment may include the source serving cell ceasing to serve.

In this case, the terminal does not need to return to the idle state, and thus the terminal state transition is avoided. In this case, the terminal remains in a connected state, and reestablishes the RRC connection by initiating an RRC connection reestablishment procedure to the target cell. In the RRC connection reestablishment process, the terminal may instruct the network side that the RRC connection reestablishment process is initiated due to the service stop of the source serving cell, and the network side may agree to the RRC connection reestablishment request of the terminal when knowing the information, so that the terminal recovers the connection more quickly.

In one embodiment of the present application, the terminal performing a cell selection or reselection procedure based on the handover assistance information may include one or more of:

(1) The terminal preferentially selects or reselects a target cell included in the handover auxiliary information;

(2) The terminal preferentially measures and evaluates a target cell included in the handover auxiliary information;

(3) If the handover assistance information includes third indication information, the terminal preferentially selects or reselects a target cell belonging to the same network node as the source serving cell;

(4) In case that the handover assistance information includes third indication information, the terminal preferentially measures and evaluates a target cell belonging to the same network node as the source serving cell;

(5) If the handover assistance information includes configuration information of a target cell and area information associated with the target cell, if the terminal is located within a coverage area indicated by the area information, the terminal preferentially selects or reselects the target cell associated with the area information;

(6) If the handover assistance information includes configuration information of a target cell and area information associated with the target cell, if the terminal is located within a coverage area indicated by the area information, the terminal preferentially measures and evaluates the target cell associated with the area information;

(7) If the handover assistance information includes configuration information of a target cell and area information associated with the target cell, if the terminal is out of coverage area indicated by the area information, the terminal stops measuring and evaluating the target cell associated with the area information;

the third indication information is used for indicating that the target cell and the source service cell of the terminal belong to the same network node or do not belong to the same network node.

(1) The terminal performs a cell selection or reselection process based on the handover assistance information within an effective time;

(2) The terminal does not apply the switching auxiliary information to execute a cell selection or reselection process outside the effective time;

(3) The terminal releases the switching auxiliary information outside the effective time;

(4) Under the condition that the cell selection or reselection process is successfully completed for N times, the terminal does not apply the switching auxiliary information to execute the cell selection or reselection process; wherein N is an integer greater than or equal to 1;

(5) Under the condition that the cell selection or reselection process is successfully completed for N times, the terminal releases the switching auxiliary information;

(6) Under the condition that the RRC connection reestablishment is successfully completed, the terminal does not apply the switching auxiliary information to execute a cell selection or reselection process;

(7) Under the condition that RRC connection reestablishment is successfully completed, the terminal releases the switching auxiliary information;

wherein the valid time is used for representing the effective time of the switching auxiliary information.

Alternatively, the validity time may be implemented by a timer. Illustratively, the timer is enabled when the UE returns to the idle state or is started when the source serving cell is out of service. As another example, the timer may be started when the terminal initiates the RRC connection reestablishment procedure.

In the embodiment of the application, under the condition that the source node provides the switching auxiliary information, the terminal can process the switching auxiliary information based on the AS security state, and the processing behavior of the terminal on the switching auxiliary information is clarified.

Referring to fig. 3, an embodiment of the present application provides a handover processing method, which is applied to a target node, and includes: step 301.

Step 301: the target node responds to an RRC reestablishment process initiated by the terminal;

Optionally, before step 301, the target node may receive a request message sent by the terminal in response to the handover assistance information, so that in step 301, the target node participates in the RRC reestablishment procedure in response to the request message.

In one embodiment of the present application, the target node responding to the RRC reestablishment procedure includes one or more of:

(1) The target node sends fourth indication information to the terminal, wherein the fourth indication information is used for indicating the terminal to fall back to an RRC connection establishment process;

(2) The target node does not initiate a terminal context extraction process;

(3) And under the condition that the terminal provides the security verification parameters to the target node through the RRC reestablishment process, the target node ignores the security verification parameters.

Optionally, the security verification parameters include, but are not limited to, short media access control identification (short MAC-I).

In one embodiment of the present application, the RRC reestablishment procedure initiated by the target node in response to the terminal includes:

the target node obtains second indication information sent by the terminal;

The target node responds to the RRC reestablishment process based on the second indication information, wherein the second indication information is used for indicating the RRC reestablishment reason.

In one embodiment of the present application, the RRC reestablishment cause may include a source serving cell ceasing to serve.

It should be noted that, through the RRC connection reestablishment cause information, the target node may identify that the RRC connection reestablishment procedure is initiated under the condition that the terminal AS security is not activated, so that the method is different from the conventional RRC reestablishment procedure, that is, the network side does not need to initiate a request for extracting the terminal context to the source node of the terminal. In this case, the target node instructs the terminal to fall back to the RRC connection setup procedure, thereby causing the terminal to initiate a subsequent procedure to establish a context at the target node.

In the embodiment of the application, the target node responds to the RRC reestablishment process initiated by the terminal under the condition that the AS security is not activated, and the terminal can be prevented from returning to the idle state, so that the state transition of the terminal is avoided, and the terminal behavior is simplified.

In order to facilitate understanding of the embodiments of the present application, the following description is made in connection with example 1.

Example 1

Referring to fig. 4, the specific steps are as follows:

step 0: the source node provides handover assistance information including at least one of target cell configuration information and handover trigger event information, such as a time event.

Optionally, the handover assistance information is provided by broadcast or multicast.

The destination switching auxiliary information is used for assisting one or more UEs in the source serving cell to switch from the source serving cell to the target cell. The source service cell is a cell managed by the source node.

Illustratively, UEs within the source serving cell perform a handover procedure based on the handover assistance information when a serving link handover (service link switch) and/or a feedback link handover (feeder link switch) occurs.

Step 1: and the connected UE processes the switching auxiliary information.

Optionally, the processing behavior of the UE in the connection state on the handover assistance information includes any one of the following:

(1) The UE does not receive the handover assistance information until AS security of the UE is activated.

Illustratively, the source serving cell provides the handover assistance information via a system message (e.g., SIBx) that is not received by UE1 until the AS security of UE1 is activated;

(2) After the AS security activation of the UE, the UE receives the handover assistance information.

Illustratively, the source serving cell provides the handover assistance information via a system message, which the UE1 (starts) to receive after the AS security activation of the UE 1;

(3) The UE does not apply the handover assistance information until the AS security of the UE is activated.

Illustratively, the source serving cell provides the handover assistance information via a system message that is received by UE1 but not applied by UE1 prior to the AS security activation of UE 1;

(4) After the AS security activation of the UE, the UE applies the handover assistance information. The UE applying the handover assistance information includes performing a handover procedure using the handover assistance information.

Illustratively, the source serving cell provides the handover assistance information through a system message, and after the AS security of the UE1 is activated, the UE1 starts to receive and apply or starts to apply the handover assistance information;

(5) And under the condition that the first indication information is received, the UE applies the switching auxiliary information. The first indication information is used for indicating or configuring the UE to execute a switching process based on the switching auxiliary information of broadcasting or multicasting.

Illustratively, the source node may provide the first indication information to the UE. And under the condition that the first indication information is received, the UE starts to receive and apply or starts to apply the switching auxiliary parameter. The first indication information may be transmitted after AS security activation of the UE.

Wherein, if the UE knows the service stopping time of the source serving cell, if the AS security of the UE is not activated, the processing behavior of the UE on the handover assistance information may further include one or more of the following:

(1) The UE performs cell selection or reselection based on the handover assistance information when the source serving cell is out of service or is about to be out of service.

Illustratively, the UE knows the timing when the source serving cell stops serving (e.g., the timing when service link switch and/or feeder link switch occurs) based on the handover assistance information (e.g., the handover trigger event time event), and the UE may perform cell selection or reselection, such as preferentially selecting or reselecting the target cell in the handover assistance information, based on the handover assistance information (e.g., the target cell configuration information).

As another example, in the case that the source serving cell provides a time parameter (e.g., t-service) for stopping service, the terminal knows the time for stopping service of the source cell based on the parameter, and the UE may perform cell selection or reselection based on the handover assistance information (e.g., target cell configuration information), e.g., prioritize or reselect the target cell in the handover assistance information

(2) When the source serving cell is out of service or is about to be out of service, the UE reestablishes an RRC connection based on the handover assistance information.

Illustratively, the UE knows the timing of occurrence service link switch and/or feeder link switch based on the handover assistance information (e.g., the handover trigger event time event), and the UE may perform cell selection or reselection based on the handover assistance information (e.g., the target cell configuration information), such as to preferentially select the target cell in the handover assistance information.

Wherein when the source serving cell is out of service or is about to be out of service, the UE performing cell selection or reselection based on the handover assistance information includes any one of:

(1) And receiving an RRC release instruction before the source serving cell stops serving, returning the UE to an idle state, and performing cell selection or reselection based on the switching auxiliary information.

(2) The UE actively reverts to an idle state before the source serving cell ceases service and performs cell selection or reselection based on the handover assistance information.

(3) The UE remains connected until the source serving cell stops serving and performs cell selection or reselection and reestablishment of RRC connection based on the handover assistance information.

Wherein the UE performing cell selection or reselection based on the handover assistance information includes any one of:

(1) The UE preferentially selects or reselects a target cell included in the handover assistance information.

Illustratively, the handover assistance information includes a configuration of Cell1 and Cell2, and the UE preferentially attempts to camp on either Cell1 or Cell2.

(2) The UE preferentially selects a target cell that the measurement evaluation handover assistance information includes. For example, if the handover assistance information includes configurations of the target cell1 and cell2, the UE preferentially measures and evaluates the cell1 or the cell2.

(3) When the handover assistance information includes target cell configuration and indication information of whether the target cell belongs to the same base station as the source serving cell, the UE preferentially selects or reselects to the target cell belonging to the same base station as the source serving cell.

(4) If the handover assistance information includes a target cell configuration and the target cell configuration is associated with the area information, if the UE is or will be within an area range represented by the area information associated with the target cell, the UE preferentially selects or reselects to the target cell;

(5) In the case that the handover assistance information includes a target cell configuration and the target cell configuration is associated with the region information, if the UE is or will be within a region indicated by the region information associated with the target cell, the UE preferentially measures and evaluates the target cell.

Wherein when the source serving cell is out of service or is about to be out of service, the UE reestablishing an RRC connection based on the handover assistance information comprises one or more of:

(1) The UE selects or reselects a first target cell based on the handover assistance information and initiates a re-establishment RRC procedure to the first target cell.

(2) The UE provides second indication information to the target node. The second indication information is used for indicating a reason for reestablishing the RRC connection, where the target node is a network node to which the first target cell belongs.

Illustratively, the reason for reestablishing the RRC connection may be that the source serving cell is out of service.

Wherein the act of the UE performing cell selection or reselection based on the handover assistance information further comprises one or more of:

(1) The UE may perform cell selection or reselection based on the handover assistance information during an active time.

Wherein the effective time can be realized by a timer.

Illustratively, the timer is started when the UE returns to the idle state or the timer is started when the source serving cell is out of service;

(2) And the UE releases the switching auxiliary information after successfully completing N times of cell selection or reselection, or does not apply the switching auxiliary information after successfully completing N times of cell reselection, wherein N is an integer greater than or equal to 1.

(3) And the UE releases the switching auxiliary information after the RRC reestablishment is successfully completed, or does not apply the switching auxiliary information after the RRC reestablishment is successfully completed.

Step 3: optionally, the target node receives second indication information provided by the UE, and the behavior of the target node includes one or more of the following:

(1) And based on the reason of reestablishing the RRC connection, the target node sends fourth indication information to the terminal, and indicates the UE to fall back to the RRC establishment process.

Illustratively, when the reason for receiving the RRC connection reestablishment by the UE at the target node is that the source serving cell stops serving, the target node sends an RRC setup message to the UE to instruct the UE to fall back to the RRC setup procedure.

(2) Based on the reason for reestablishing the RRC connection, the target node does not initiate a procedure to extract the UE context.

Illustratively, the reason why the target node receives the UE reestablishing the RRC connection is that the source serving cell stops serving, and the target node does not initiate the process of extracting the UE context.

(3) Based on the reason of reestablishing the RRC connection, the target node ignores the security check parameters in the reestablishment RRC message.

Illustratively, the reason for receiving the UE to reestablish the RRC connection at the target node is that the source serving cell stops serving, and the target node ignores the security check parameter (e.g., short MAC-I) in the reestablishment RRC message.

Referring to fig. 5, an embodiment of the present application provides a handover processing apparatus, which is applied to a terminal, where the apparatus 500 includes:

a first processing module 501, configured to process, in a case where the source node provides handover assistance information, the handover assistance information based on an AS security state;

In one embodiment of the present application, the handover assistance information is provided by a broadcast or multicast mode, that is, the source node may provide the handover assistance information to the terminal by a broadcast or multicast mode.

In one embodiment of the present application, the first processing module 501 is further configured to perform one or more of the following:

(1) Under the condition that AS security of the terminal is not activated, the switching auxiliary information is not received;

(2) Receiving the switching auxiliary information under the condition that AS security of the terminal is activated;

(3) Under the condition that AS security of the terminal is not activated, the switching auxiliary information is not applied;

(4) Applying the handover assistance information in case the AS security of the terminal has been activated;

(5) Applying the handover assistance information in case of receiving the first indication information; the first indication information is used for indicating the terminal to execute a switching process based on the switching auxiliary information.

(1) Executing a handover procedure based on the handover assistance information in case the AS security of the terminal has been activated;

(2) And under the condition that AS security of the terminal is not activated, performing cell selection or reselection process based on the switching auxiliary information.

In one embodiment of the present application, the first processing module 501 is further configured to:

and under the condition that the terminal knows the service stopping information of the source service cell of the terminal, performing cell selection or reselection process based on the switching auxiliary information.

(1) Triggering the terminal to return to an idle state under the condition of receiving an RRC release instruction, and executing a cell selection or reselection process based on the handover auxiliary information;

(2) Triggering the terminal to actively return to an idle state before or when the source service cell of the terminal stops serving, and executing a cell selection or reselection process based on the switching auxiliary information;

(3) And triggering the terminal to keep a connection state and executing a cell selection or reselection process based on the switching auxiliary information before or when the source service cell of the terminal stops serving.

In one embodiment of the present application, the first processing module 501 includes:

a selection unit configured to select a first target cell based on the handover assistance information;

and the reconstruction unit is used for initiating an RRC reconstruction process through the first target cell.

In one embodiment of the present application, the reconstruction unit is further configured to:

and providing second indication information to a target node, wherein the second indication information is used for indicating the reason of RRC reconstruction, and the target node is a network node to which the first target cell belongs.

In one embodiment of the present application, the reason for the RRC reestablishment may include the source serving cell ceasing to serve.

(1) Preferentially selecting or reselecting a target cell included in the handover assistance information;

(2) Preferentially measuring and evaluating a target cell included in the handover assistance information;

(3) If the handover assistance information includes third indication information, preferentially selecting or reselecting a target cell belonging to the same network node as the source serving cell;

(4) In case the handover assistance information comprises a third indication information, preferentially measuring and evaluating a target cell belonging to the same network node as the source serving cell;

(5) If the handover assistance information includes configuration information of a target cell and area information associated with the target cell, if the terminal is located within a coverage area indicated by the area information, preferentially selecting or reselecting the target cell associated with the area information;

(6) If the handover assistance information includes configuration information of a target cell and area information associated with the target cell, if the terminal is located within a coverage area indicated by the area information, preferentially measuring and evaluating the target cell associated with the area information;

(7) If the handover assistance information includes configuration information of a target cell and area information associated with the target cell, stopping measurement and evaluation of the target cell associated with the area information if the terminal is out of coverage area indicated by the area information;

(1) Performing a cell selection or reselection procedure based on the handover assistance information during an active time;

(2) Performing a cell selection or reselection procedure without applying the handover assistance information outside the effective time;

(3) Releasing the switching auxiliary information outside the effective time;

(4) Under the condition that the cell selection or reselection process is successfully completed for N times, the cell selection or reselection process is not executed by applying the switching auxiliary information; wherein N is an integer greater than or equal to 1;

(5) Releasing the switching auxiliary information under the condition that the cell selection or reselection process is successfully completed for N times;

(6) Under the condition that the RRC connection reestablishment is successfully completed, the switching auxiliary information is not applied to execute a cell selection or reselection process;

(7) Releasing the switching auxiliary information under the condition that the RRC connection reestablishment is successfully completed;

The device provided in this embodiment of the present application can implement each process implemented by the method embodiment of fig. 2, and achieve the same technical effects, so that repetition is avoided, and details are not repeated here.

Referring to fig. 6, an embodiment of the present application provides a handover processing apparatus, applied to a target node, where the apparatus 600 includes:

a second processing module 601, configured to respond to an RRC reestablishment procedure initiated by the terminal;

In one embodiment of the present application, the second processing module 601 is further configured to perform one or more of the following:

(1) Sending fourth indication information to the terminal, wherein the fourth indication information is used for indicating the terminal to fall back to an RRC connection establishment process;

(2) The terminal context extraction process is not initiated;

(3) And under the condition that the terminal provides the security verification parameters to the target node through the RRC reestablishment process, ignoring the security verification parameters.

In one embodiment of the present application, the second processing module 601 includes:

the acquisition unit is used for acquiring second instruction information sent by the terminal;

and a response unit, configured to respond to the RRC reestablishment procedure based on the second indication information, where the second indication information is used to indicate a cause of RRC reestablishment.

In one embodiment of the present application, the RRC reestablishment cause includes a source serving cell ceasing to serve.

The device provided in this embodiment of the present application can implement each process implemented by the method embodiment of fig. 3, and achieve the same technical effects, so that repetition is avoided, and details are not repeated here.

Fig. 7 is a schematic hardware structure of a terminal for implementing an embodiment of the present application. The terminal 700 includes, but is not limited to: at least some of the components of the radio frequency unit 701, the network module 702, the audio output unit 703, the input unit 704, the sensor 705, the display unit 706, the user input unit 707, the interface unit 708, the memory 709, and the processor 710.

Those skilled in the art will appreciate that the terminal 700 may further include a power source (e.g., a battery) for powering the various components, and that the power source may be logically coupled to the processor 710 via a power management system so as to perform functions such as managing charging, discharging, and power consumption via the power management system. The terminal structure shown in fig. 7 does not constitute a limitation of the terminal, and the terminal may include more or less components than shown, or may combine certain components, or may be arranged in different components, which will not be described in detail herein.

It should be appreciated that in embodiments of the present application, the input unit 704 may include a graphics processing unit (Graphics Processing Unit, GPU) 7041 and a microphone 7042, with the graphics processor 7041 processing image data of still pictures or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The display unit 706 may include a display panel 7061, and the display panel 7061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 707 includes at least one of a touch panel 7071 and other input devices 7072. The touch panel 7071 is also referred to as a touch screen. The touch panel 7071 may include two parts, a touch detection device and a touch controller. Other input devices 7072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and so forth, which are not described in detail herein.

In this embodiment, after receiving downlink data from the network side device, the radio frequency unit 701 may transmit the downlink data to the processor 710 for processing; in addition, the radio frequency unit 701 may send uplink data to the network side device. Typically, the radio unit 701 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.

The memory 709 may be used to store software programs or instructions and various data. The memory 709 may mainly include a first storage area storing programs or instructions and a second storage area storing data, wherein the first storage area may store an operating system, application programs or instructions (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like. Further, the memory 709 may include volatile memory or nonvolatile memory, or the memory 709 may include both volatile and nonvolatile memory. The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable EPROM (EEPROM), or a flash Memory. The volatile memory may be random access memory (Random Access Memory, RAM), static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (ddr SDRAM), enhanced SDRAM (Enhanced SDRAM), synchronous DRAM (SLDRAM), and Direct RAM (DRRAM). Memory 709 in embodiments of the present application includes, but is not limited to, these and any other suitable types of memory.

Processor 710 may include one or more processing units; optionally, processor 710 integrates an application processor that primarily processes operations involving an operating system, user interface, application programs, and the like, and a modem processor that primarily processes wireless communication signals, such as a baseband processor. It will be appreciated that the modem processor described above may not be integrated into the processor 710.

The terminal provided in this embodiment of the present application can implement each process implemented by the method embodiment of fig. 2, and achieve the same technical effects, so that repetition is avoided, and details are not repeated here.

Referring to fig. 8, fig. 7 is a block diagram of a communication device to which an embodiment of the present invention is applied, and as shown in fig. 8, a communication device 800 includes: a processor 801, a transceiver 802, a memory 803, and a bus interface, wherein the processor 801 may be responsible for managing the bus architecture and general processing. The memory 803 may store data used by the processor 801 in performing operations.

In one embodiment of the present invention, the communication device 800 further comprises: a program stored in the memory 803 and executable on the processor 801, which when executed by the processor 801, performs the steps in the method shown in fig. 2 or fig. 3 above.

In fig. 8, a bus architecture may be comprised of any number of interconnected buses and bridges, and in particular, one or more processors represented by the processor 801 and various circuits of the memory represented by the memory 803. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The transceiver 802 may be a number of elements, i.e., including a transmitter and a receiver, providing a means for communicating with various other apparatus over a transmission medium.

Optionally, as shown in fig. 9, the embodiment of the present application further provides a communication device 900, including a processor 901 and a memory 902, where the memory 902 stores a program or an instruction that can be executed on the processor 901, for example, when the communication device 900 is a terminal, the program or the instruction is executed by the processor 901 to implement each step of the method embodiment of fig. 2, and when the communication device 900 is a network device, the program or the instruction is executed by the processor 901 to implement each step of the method embodiment of fig. 3 and achieve the same technical effect, which is not repeated herein.

The embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored, and when the program or the instruction is executed by a processor, the method of fig. 2 or fig. 3 and the processes of the foregoing embodiments are implemented, and the same technical effects can be achieved, so that repetition is avoided, and no further description is given here.

Wherein the processor is a processor in the terminal described in the above embodiment. The readable storage medium may be non-volatile or non-transitory. The readable storage medium may include a computer readable storage medium such as a computer read only memory ROM, a random access memory RAM, a magnetic or optical disk, etc.

The embodiment of the application further provides a chip, the chip includes a processor and a communication interface, the communication interface is coupled with the processor, the processor is configured to run a program or instructions, implement the processes shown in fig. 2 or fig. 3 and described in the above embodiments of the method, and achieve the same technical effects, so that repetition is avoided, and no further description is provided here.

It should be understood that the chips referred to in the embodiments of the present application may also be referred to as system-on-chip chips, or the like.

The embodiments of the present application further provide a computer program/program product stored in a storage medium, where the computer program/program product is executed by at least one processor to implement the respective processes of the respective method embodiments shown in fig. 2 or fig. 3 and described above, and achieve the same technical effects, and are not repeated herein.

The embodiment of the present application further provides a communication system, where the communication system includes a terminal and a network side device, the terminal is configured to execute each process of the embodiments of the method as shown in fig. 2 and described above, and the network device is configured to execute each process of the embodiments of the method as shown in fig. 3 and described above, and the same technical effects can be achieved, so that repetition is avoided, and no redundant description is given here.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solutions of the present application may be embodied essentially or in a part contributing to the prior art in the form of a computer software product stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk), comprising several instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method described in the embodiments of the present application.

The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those of ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are also within the protection of the present application.

Claims

1. A handover processing method, comprising:

2. The method of claim 1, wherein the handover assistance information is provided by broadcast or multicast.

3. The method of claim 1, wherein the terminal processing the handover assistance information based on AS security status comprises one or more of:

under the condition that AS security of the terminal is not activated, the terminal does not receive the switching auxiliary information;

the terminal receives the switching auxiliary information under the condition that AS security of the terminal is activated;

under the condition that AS security of the terminal is not activated, the terminal does not apply the switching auxiliary information;

the terminal applies the switching auxiliary information under the condition that AS security of the terminal is activated;

under the condition that first indication information is received, the terminal applies the switching auxiliary information; the first indication information is used for indicating the terminal to execute a switching process based on the switching auxiliary information.

4. The method of claim 1, wherein the terminal processing the handover assistance information based on AS security status comprises one or more of:

under the condition that AS security of the terminal is activated, the terminal executes a switching process based on the switching auxiliary information;

and under the condition that AS security of the terminal is not activated, the terminal performs a cell selection or reselection process based on the handover auxiliary information.

5. The method of claim 4, wherein the terminal performing a cell selection or reselection procedure based on the handover assistance information comprises:

6. The method according to claim 4 or 5, wherein the terminal performing a cell selection or reselection procedure based on the handover assistance information comprises one or more of:

under the condition that a Radio Resource Control (RRC) release instruction is received, returning to an idle state by the terminal, and executing a cell selection or reselection process based on the handover auxiliary information;

Before or when the source service cell of the terminal stops serving, the terminal actively returns to an idle state and performs a cell selection or reselection process based on the switching auxiliary information;

before or when the source serving cell of the terminal is out of service, the terminal maintains a connected state and performs a cell selection or reselection procedure based on the handover assistance information.

7. The method of claim 6, wherein the terminal maintains a connected state and performs a cell selection or reselection procedure based on the handover assistance information, comprising:

8. The method of claim 7, wherein the terminal initiating the RRC reestablishment procedure through the first target cell comprises:

the terminal provides second indication information for a target node, wherein the second indication information is used for indicating the reason of RRC reconstruction, and the target node is a network node to which the first target cell belongs.

9. The method of claim 8, wherein the cause of RRC reestablishment comprises a source serving cell ceasing to serve.

10. The method according to claim 4 or 5, wherein the terminal performing a cell selection or reselection procedure based on the handover assistance information comprises one or more of:

the terminal preferentially selects or reselects a target cell included in the handover auxiliary information;

the terminal preferentially measures and evaluates a target cell included in the handover auxiliary information;

if the handover assistance information includes third indication information, the terminal preferentially selects or reselects a target cell belonging to the same network node as the source serving cell;

in case that the handover assistance information includes third indication information, the terminal preferentially measures and evaluates a target cell belonging to the same network node as the source serving cell;

if the handover assistance information includes configuration information of a target cell and area information associated with the target cell, if the terminal is located within a coverage area indicated by the area information, the terminal preferentially selects or reselects the target cell associated with the area information;

if the handover assistance information includes configuration information of a target cell and area information associated with the target cell, if the terminal is located within a coverage area indicated by the area information, the terminal preferentially measures and evaluates the target cell associated with the area information;

If the handover assistance information includes configuration information of a target cell and area information associated with the target cell, if the terminal is out of coverage area indicated by the area information, the terminal stops measuring and evaluating the target cell associated with the area information;

11. The method according to claim 4 or 5, wherein the terminal performing a cell selection or reselection procedure based on the handover assistance information comprises one or more of:

the terminal performs a cell selection or reselection process based on the handover assistance information within an effective time;

the terminal does not apply the switching auxiliary information to execute a cell selection or reselection process outside the effective time;

the terminal releases the switching auxiliary information outside the effective time;

under the condition that the cell selection or reselection process is successfully completed for N times, the terminal does not apply the switching auxiliary information to execute the cell selection or reselection process; wherein N is an integer greater than or equal to 1;

Under the condition that the cell selection or reselection process is successfully completed for N times, the terminal releases the switching auxiliary information;

under the condition that the RRC connection reestablishment is successfully completed, the terminal does not apply the switching auxiliary information to execute a cell selection or reselection process;

under the condition that RRC connection reestablishment is successfully completed, the terminal releases the switching auxiliary information;

12. A method of handoff processing, the method comprising:

13. The method of claim 12, wherein the target node responding to terminal initiated RRC reestablishment procedure comprises one or more of:

the target node sends fourth indication information to the terminal, wherein the fourth indication information is used for indicating the terminal to fall back to an RRC connection establishment process;

the target node does not initiate a terminal context extraction process;

and under the condition that the terminal provides the security verification parameters to the target node through the RRC reestablishment process, the target node ignores the security verification parameters.

14. The method of claim 12, wherein the target node responding to the terminal-initiated RRC reestablishment procedure comprises:

the target node obtains second indication information sent by the terminal;

15. The method of claim 14, wherein the RRC reestablishment cause comprises a source serving cell ceasing to serve.

16. A switching processing apparatus, comprising:

the first processing module is used for processing the switching auxiliary information based on the AS security state of the terminal under the condition that the source node provides the switching auxiliary information;

17. The apparatus of claim 16, wherein the handover assistance information is provided by broadcast or multicast.

18. The apparatus of claim 16, wherein the first processing module is further to perform one or more of:

Under the condition that AS security of the terminal is not activated, the switching auxiliary information is not received;

receiving the switching auxiliary information under the condition that AS security of the terminal is activated;

under the condition that AS security of the terminal is not activated, the switching auxiliary information is not applied;

applying the handover assistance information in case the AS security of the terminal has been activated;

applying the handover assistance information in case of receiving the first indication information; the first indication information is used for indicating the terminal to execute a switching process based on the switching auxiliary information.

19. The apparatus of claim 16, wherein the first processing module is further to perform one or more of:

executing a handover procedure based on the handover assistance information in case the AS security of the terminal has been activated;

and under the condition that AS security of the terminal is not activated, performing cell selection or reselection process based on the switching auxiliary information.

20. The apparatus of claim 19, wherein the first processing module is further to:

21. The apparatus of claim 19 or 20, wherein the first processing module is further to perform one or more of:

triggering the terminal to return to an idle state under the condition of receiving an RRC release instruction, and executing a cell selection or reselection process based on the handover auxiliary information;

triggering the terminal to actively return to an idle state before or when the source service cell of the terminal stops serving, and executing a cell selection or reselection process based on the switching auxiliary information;

and triggering the terminal to keep a connection state and executing a cell selection or reselection process based on the switching auxiliary information before or when the source service cell of the terminal stops serving.

22. The apparatus of claim 21, wherein the first processing module comprises:

23. The apparatus of claim 22, wherein the reconstruction unit is further configured to:

24. The apparatus of claim 19 or 20, wherein the first processing module is further to perform one or more of:

preferentially selecting or reselecting a target cell included in the handover assistance information;

preferentially measuring and evaluating a target cell included in the handover assistance information;

if the handover assistance information includes third indication information, preferentially selecting or reselecting a target cell belonging to the same network node as the source serving cell;

in case the handover assistance information comprises a third indication information, preferentially measuring and evaluating a target cell belonging to the same network node as the source serving cell;

if the handover assistance information includes configuration information of a target cell and area information associated with the target cell, if the terminal is located within a coverage area indicated by the area information, preferentially selecting or reselecting the target cell associated with the area information;

when the handover assistance information includes configuration information of a target cell and area information associated with the target cell, if the terminal is located within a coverage area indicated by the area information, preferentially measuring and evaluating the target cell associated with the area information;

If the handover assistance information includes configuration information of a target cell and area information associated with the target cell, stopping measurement and evaluation of the target cell associated with the area information if the terminal is out of coverage area indicated by the area information;

25. The apparatus of claim 19 or 20, wherein the first processing module is further to perform one or more of:

performing a cell selection or reselection procedure based on the handover assistance information during an active time;

performing a cell selection or reselection procedure without applying the handover assistance information outside the effective time;

releasing the switching auxiliary information outside the effective time;

under the condition that the cell selection or reselection process is successfully completed for N times, the cell selection or reselection process is not executed by applying the switching auxiliary information; wherein N is an integer greater than or equal to 1;

releasing the switching auxiliary information under the condition that the cell selection or reselection process is successfully completed for N times;

Under the condition that the RRC connection reestablishment is successfully completed, the switching auxiliary information is not applied to execute a cell selection or reselection process;

releasing the switching auxiliary information under the condition that the RRC connection reestablishment is successfully completed;

26. A switching processing apparatus, comprising:

27. The apparatus of claim 26, wherein the second processing module is further to perform one or more of:

sending fourth indication information to the terminal, wherein the fourth indication information is used for indicating the terminal to fall back to an RRC connection establishment process;

the terminal context extraction process is not initiated;

and under the condition that the terminal provides the security verification parameters for the target node through the RRC reestablishment process, ignoring the security verification parameters.

28. The apparatus of claim 26, wherein the second processing module comprises:

29. A communication device comprising a processor, a memory and a program or instruction stored on the memory and executable on the processor, which when executed by the processor implements the steps of the method of any of claims 1 to 15.

30. A readable storage medium, characterized in that it stores thereon a program or instructions which, when executed by a processor, implement the steps of the method according to any of claims 1 to 15.