CN114071603A

CN114071603A - Method and device for maintaining service continuity in terminal moving process

Info

Publication number: CN114071603A
Application number: CN202010776372.9A
Authority: CN
Inventors: 周锐; 谌丽
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2020-08-05
Filing date: 2020-08-05
Publication date: 2022-02-18
Also published as: WO2022028288A1

Abstract

The embodiment of the application provides a method and a device for maintaining service continuity in a terminal moving process, wherein the method comprises the following steps: receiving first information, wherein the first information indicates whether a first cell has an MBMS function or not; and preferentially selecting the first cell with the MBMS function as a target cell for cell selection or reselection according to the first information. In the embodiment of the present application, a network side may indicate whether a neighboring cell has an MBMS function through an RRC message (e.g., system information) of a serving cell or/and the neighboring cell, and a UE preferentially selects the neighboring cell having the MBMS function as a target cell, and if a corresponding MBMS service is not already started in the target cell having the MBMS function, the target cell may dynamically start transmission of the corresponding MBMS service, so that it may be ensured that the UE maintains continuity of MBMS service reception in a moving process.

Description

Method and device for maintaining service continuity in terminal moving process

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method and an apparatus for maintaining service continuity during a terminal moving process.

Background

The fifth generation mobile communication system (5G) prior art only supports unicast Service, but MBMS (Multimedia Broadcast Multicast Service) has long existed in the third generation mobile communication system (3G) and the third generation mobile communication system (4G) technology as an important Service type. In view of the importance of MBMS services to certain vertical areas (e.g. car networking, public safety), MBMS will be introduced in release 17 of 5G (R17).

The existing Long Term Evolution (LTE) technology supports the requirement of pre-configuring an MBMS service coverage area or dynamically adjusting a service coverage area by a core network, and cannot support an access network with an MBMS function in a 5G system to dynamically adjust the MBMS service coverage area as needed according to the MBMS service receiving requirement of a UE entering a cell coverage area.

Disclosure of Invention

An object of the embodiments of the present application is to provide a method and an apparatus for maintaining service continuity during a terminal moving process, so as to solve how to maintain continuity of MBMS service reception during a moving process of a UE.

In a first aspect, a method for maintaining service continuity during a terminal moving process is provided, and is applied to a terminal, and includes:

receiving first information, wherein the first information indicates whether a first cell has a multicast broadcast MBMS function;

and preferentially selecting the first cell with the MBMS function as a target cell for cell selection or reselection according to the first information.

Optionally, the receiving the first information includes:

receiving first information from a source cell, wherein co-frequency cell information or inter-frequency cell reselection information in the first information indicates whether a corresponding frequency point and/or a first cell on the frequency point has an MBMS function;

the preferentially selecting the first cell with the MBMS function as the target cell for cell selection or reselection according to the first information comprises the following steps:

triggering measurement of the neighbor cell according to a cell selection or cell reselection criterion;

and preferentially selecting the first cell with the MBMS function as a target cell for cell selection or reselection according to the measurement result and the first information.

Optionally, the receiving the first information includes:

selecting a first cell according to a cell selection or cell reselection criterion;

and acquiring first information of the first cell, wherein the first information indicates whether the first cell has an MBMS function.

Optionally, the method further comprises:

and if the first cell has the MBMS function, the terminal is resided in the first cell with the MBMS function.

Optionally, the method further comprises:

before residing in a first cell with an MBMS function, the terminal in an idle state or an inactive state is triggered to enter a connected state, reports the information of the MBMS service being received to a current service cell and indicates that the terminal leaves the current cell.

Optionally, the method further comprises:

if the terminal resides in a first cell with the MBMS function, the terminal in an idle state or an inactive state is triggered to enter a connected state, and information of receiving the MBMS is reported to the first cell.

Optionally, the receiving the first information includes:

receiving a first message from a source cell, the first message comprising: information of a first cell and first information indicating whether the first cell has an MBMS function;

wherein the first cell is selected by the source cell according to the measurement report of the terminal and the requirement of the terminal for receiving the MBMS service.

Optionally, the method further comprises:

receiving a measurement configuration from the source cell, wherein the measurement configuration is configured by the source cell according to the requirement of the terminal for receiving the MBMS service;

and measuring the adjacent cell according to the measurement configuration, and sending a measurement report to the source cell.

Optionally, the receiving the first information includes:

receiving a second message from a source cell, the second message comprising: measurement configuration and first information for neighbor cell measurement, the first information indicating whether a first cell has an MBMS function;

receiving a third message from the source cell, wherein the third message carries information of the first cell, and the first cell is selected by the source cell according to the measurement report of the terminal;

and judging whether the first cell has the MBMS function or not according to the information of the first cell and the first information.

Optionally, the method further comprises:

and if the first cell has the MBMS function, the terminal is switched to the first cell and continues to receive the MBMS service through the first cell.

Optionally, the method further comprises:

and if the first cell does not have the MBMS function, the terminal initiates a unicast bearer establishment process, and continues to receive the MBMS service through unicast bearer after being switched to the first cell.

In a second aspect, a method for maintaining service continuity during a terminal moving process is provided, and is applied to an access network side device, and includes:

and sending first information, wherein the first information indicates whether the first cell has the MBMS function.

Optionally, the co-frequency cell information or the inter-frequency cell reselection information in the first information indicates whether the corresponding frequency point and/or the first cell on the frequency point has the MBMS function.

Optionally, the sending first information, where the first information indicates whether the first cell has an MBMS function, includes:

transmitting, by a first cell, first information indicating whether the first cell has an MBMS function, the first cell being selected by the terminal based on a cell selection or cell reselection criterion.

transmitting a first message, the first message comprising: information of a first cell and first information indicating whether the first cell has an MBMS function;

prior to sending the first message, the method further comprises:

acquiring a measurement report of the terminal and a requirement of the terminal for receiving the MBMS service;

and selecting a first cell according to the measurement report of the terminal and the requirement of the terminal for receiving the MBMS service.

sending a second message, the second message comprising: measurement configuration and first information for neighbor cell measurement, the first information indicating whether a first cell has an MBMS function;

after sending the second message, the method further comprises:

receiving a measurement report reported by the terminal;

and selecting a first cell according to the measurement report, and sending a third message to the terminal, wherein the third message carries the information of the first cell.

Optionally, the method further comprises:

acquiring the requirement of the terminal for receiving the MBMS service;

and if the first cell does not start the transmission of the corresponding MBMS, dynamically starting the transmission of the corresponding MBMS according to the requirement.

Optionally, the starting transmission of the corresponding MBMS service includes:

establishing corresponding MBMS bearing;

or when the MBMS conversation does not exist, requesting the core network to establish the MBMS conversation required by the transmission of the MBMS service.

In a third aspect, an apparatus for maintaining service continuity during a terminal moving process is provided, and is applied to a terminal, and includes:

a first receiving module, configured to receive first information, where the first information indicates whether a first cell has a multicast broadcast MBMS function;

and the selection module is used for preferentially selecting the first cell with the MBMS function as a target cell for cell selection or reselection according to the first information.

In a fourth aspect, a terminal is provided, including: a processor, a transceiver, and a memory;

a transceiver for receiving and transmitting data under the control of the processor;

the processor is used for reading the program in the memory and executing the following operations: receiving first information, wherein the first information indicates whether a first cell has an MBMS function or not; and preferentially selecting the first cell with the MBMS function as a target cell for cell selection or reselection according to the first information.

In a fifth aspect, a device for maintaining service continuity during a terminal moving process is provided, where the device is applied to an access network side device, and includes:

and the second sending module is used for sending first information, and the first information indicates whether the first cell has the MBMS function.

In a sixth aspect, an access network-side device is provided, including: a processor, a transceiver, and a memory;

the processor is used for reading the program in the memory and executing the following operations: and sending first information, wherein the first information indicates whether the first cell has the MBMS function.

In a seventh aspect, a readable storage medium is provided, on which a program is stored, which when executed by a processor implements steps comprising the method of the first or second aspect.

In the embodiment of the present application, a network side may indicate whether a neighboring cell has an MBMS function through an RRC message (e.g., system information) of a serving cell or/and the neighboring cell, and a UE preferentially selects the neighboring cell having the MBMS function as a target cell, and if a corresponding MBMS service is not already started in the target cell having the MBMS function, the target cell may dynamically start transmission of the corresponding MBMS service, so that it may be ensured that the UE maintains continuity of MBMS service reception in a moving process.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

fig. 1 is a schematic diagram of a 4G terminal receiving system information SIB15 from a 4G network side in the prior art;

fig. 2 is a schematic diagram of a 4G terminal receiving a SCPTMConfiguration message from a 4G network side in the prior art;

fig. 3 is a flowchart of a method for maintaining service continuity during a terminal moving process at a terminal side in an embodiment of the present application;

fig. 4 is a flowchart of a method for maintaining service continuity during a terminal moving process at an access network side device side in the embodiment of the present application;

FIG. 5 is a flowchart in example 1 of the embodiment of the present application;

FIG. 6 is a flow chart in example 2 of the embodiment of the present application;

FIG. 7 is a flowchart in example 3 of the embodiment of the present application;

FIG. 8 is a flowchart in example 4 of the embodiment of the present application;

fig. 9 is a schematic diagram of an apparatus for maintaining service continuity during a terminal moving process in an embodiment of the present application;

fig. 10 is a schematic diagram of a terminal in an embodiment of the present application;

fig. 11 is a second schematic diagram of an apparatus for maintaining service continuity during a terminal moving process according to an embodiment of the present application;

fig. 12 is a schematic diagram of an access network-side device in an embodiment of the present application.

Detailed Description

To facilitate understanding of the embodiments of the present application, the following technical points are first introduced.

(1) MBMS service reception continuity.

Referring to fig. 1, in the existing 4G technology, system information (for example, SIB15) includes a list of MBMS Service Area Identifications (SAIs) supported by neighboring cells with the same frequency and different frequencies, and according to a locally stored User Service Description (USD) list and an SAI list in SIB15, a terminal can determine whether a certain frequency point supports a certain MBMS Service without reading system information of the neighboring cells. And the idle UE selects a neighboring cell supporting the MBMS according to the system information (SIB15) of the serving cell to ensure the continuity of the MBS service in the moving process in the idle state.

Referring To fig. 2, in the conventional 4G technology, an SC-PTMConfiguration message on a Single Cell Point To Multipoint (SC-PTM) mode control channel includes an ongoing MBMS service list of a current serving Cell and a 4G neighbor Cell list supporting each MBMS service.

When the UE in the connection state is switched, if the target cell does not support the current MBMS service, the UE establishes a unicast bearer in advance to receive the MBS service so as to ensure the MBMS service receiving continuity when the UE is switched from the cell supporting the MBMS service to the cell not supporting the MBMS service in the connection state.

(2) MBMS service coverage area

Under the LTE technology, each MBMS service pair is configured with an MBMS service area (MBMS service area), which may be fixed or dynamically adjusted, and a cell that does not belong to a service area of a specific MBMS service cannot provide a corresponding MBMS service. The dynamic adjustment of the MBMS service area under LTE is under the control of the core network.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "comprises," "comprising," or any other variation thereof, in the description and claims of this application, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Furthermore, the use of "and/or" in the specification and claims means that at least one of the connected objects, such as a and/or B, means that three cases, a alone, B alone, and both a and B, exist.

In the embodiments of the present application, words such as "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

The technical scheme provided by the embodiment of the application can be suitable for various systems, particularly 5G systems. For example, the applicable System may be a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a Time Division Synchronous Code Division Multiple Access (Time Division Multiple Access) System, a General Packet Radio Service (GPRS) System, a Long Term Evolution (LTE) System (including TD-LTE and FDD LTE), a long term evolution (long term evolution) System (LTE-a) System, a universal Mobile telecommunications System (universal Mobile telecommunications System, UMTS), a worldwide interoperability for microwave Access (WiMAX-microwave Access, Radio network (New network) System, etc., a Radio Access (NR) System, a Radio Access (New network Access) System, etc. These various systems include terminal devices and network devices. The System may further include a core network portion, such as an Evolved Packet System (EPS), a 5G System (5GS/5GC), and the like.

Referring to fig. 3, an embodiment of the present application provides a method for maintaining service continuity during a terminal moving process, where an execution subject of the method may be a terminal, and the method includes the specific steps of: step 301 and step 302.

Step 301: receiving first information, wherein the first information indicates whether a first cell has an MBMS function or not;

the first cell with the MBMS function is to implement the function required for supporting the MBMS transmission in hardware and software of the base station according to the standard requirement of 3GPP, but the transmission of the specific MBMS service is not started in the first cell, and the first cell can dynamically start the corresponding MBMS service transmission according to the requirement of the UE in the coverage area to receive the MBMS service.

Step 302: and preferentially selecting the first cell with the MBMS function as a target cell for cell selection or reselection according to the first information.

In one embodiment of the present application, first information is received from a source cell, and co-frequency cell information or inter-frequency cell reselection information in the first information indicates whether a corresponding frequency point and/or a first cell on the frequency point has an MBMS function; triggering measurement of the neighbor cell according to a cell selection or cell reselection criterion; and preferentially selecting the first cell with the MBMS function as a target cell for cell selection or reselection according to the measurement result and the first information.

In another embodiment of the present application, the first cell is selected according to a cell selection or cell reselection criterion; acquiring first information of the first cell, wherein the first information indicates whether the first cell has an MBMS function; and preferentially selecting the first cell with the MBMS function as a target cell for cell selection or reselection according to the first information.

Further, in the above two embodiments, if the first cell has the MBMS function, the terminal camps on the MBMS-capable first cell.

Further, before residing in the first cell with the MBMS function, the terminal in an idle state or an inactive state triggers to enter a connected state, reports information of the MBMS service being received to the current serving cell, and indicates that the terminal will leave the current cell.

Further, if residing in the first cell with the MBMS function, the terminal in an idle state or an inactive state is triggered to enter a connected state, and reports information of receiving the MBMS service to the first cell, and if a target cell with the MBMS function has not established a corresponding MBMS session, the target cell is triggered to establish the MBMS session to ensure the continuity of MBMS service reception of the UE, and meanwhile, the MBMS service coverage area is dynamically adjusted and updated, and the target cell is included in the service coverage area.

In yet another embodiment of the present application, a first message is received from a source cell, the first message comprising: information of a first cell and first information indicating whether the first cell has an MBMS function; wherein the first cell is selected by the source cell according to the measurement report of the terminal and the requirement of the terminal for receiving the MBMS service.

Further, receiving a measurement configuration from the source cell, where the measurement configuration is configured by the source cell according to a requirement of the terminal for receiving the MBMS service; and measuring the adjacent cell according to the measurement configuration, and sending a measurement report to the source cell.

In yet another embodiment of the present application, a second message is received from a source cell, the second message comprising: measurement configuration and first information for neighbor cell measurement, the first information indicating whether a first cell has an MBMS function; receiving a third message from the source cell, wherein the third message carries information of the first cell, and the first cell is selected by the source cell according to the measurement report of the terminal; and judging whether the first cell has the MBMS function or not according to the information of the first cell and the first information.

Further, if the first cell has the MBMS function, the terminal switches to the first cell and continues to receive the MBMS service through the first cell.

In the embodiment of the application, if the first cell does not have the MBMS function, the terminal initiates a unicast bearer establishment procedure, and continues to receive the MBMS service through the unicast bearer after switching to the first cell.

In the embodiment of the present application, a network side may indicate whether a neighboring cell has an MBMS function through an RRC message (e.g., system information) of a serving cell or/and the neighboring cell, and a UE preferentially selects the neighboring cell having the MBMS function as a target cell, so that it may be ensured that the UE maintains continuity of MBMS service reception during a moving process.

Referring to fig. 4, an embodiment of the present application provides a method for maintaining service continuity during a terminal moving process, where an execution subject of the method may be an access network side device, and the method includes the specific steps of: step 401.

Step 401: and sending first information, wherein the first information indicates whether the first cell has the MBMS function.

In this embodiment of the present application, the co-frequency cell information or the inter-frequency cell reselection information in the first information indicates whether a corresponding frequency point and/or a first cell on the frequency point has an MBMS function.

In one embodiment of the present application, first information is transmitted by a first cell, the first information indicating whether the first cell has a multicast broadcast MBMS function, the first cell being selected by the terminal based on a cell selection or cell reselection criterion.

In another embodiment of the present application, a measurement report of the terminal and a requirement of the terminal for receiving an MBMS service are obtained; and selecting a first cell according to the measurement report of the terminal and the requirement of the terminal for receiving the MBMS service. Transmitting a first message, the first message comprising: information of a first cell and first information indicating whether the first cell has an MBMS function.

In yet another embodiment of the present application, a second message is sent, the second message comprising: measurement configuration and first information for neighbor cell measurement, the first information indicating whether a first cell has an MBMS function; receiving a measurement report reported by the terminal; and selecting a first cell according to the measurement report, and sending a third message to the terminal, wherein the third message carries the information of the first cell.

In an embodiment of the present application, the method further includes: acquiring the requirement of the terminal for receiving the MBMS service; and if the first cell does not start the transmission of the corresponding MBMS, dynamically starting the transmission of the corresponding MBMS according to the requirement. Therefore, the network side can dynamically adjust the MBMS coverage area according to the requirement of the UE for receiving the MBMS.

Further, the starting transmission of the corresponding MBMS service includes: establishing corresponding MBMS bearing; or when the MBMS conversation does not exist, requesting the core network to establish the MBMS conversation required by the transmission of the MBMS service.

The embodiments of the present application will be described below with reference to examples 1 to 4.

Example 1:

referring to fig. 5, the specific steps include step 1 to step 5.

Step 1: the source cell sends an RRC message to the UE.

The source cell indicates whether the corresponding frequency point and/or the cell on the frequency point has the MBMS function in the same-frequency cell information and/or different-frequency cell information in the RRC message (such as system information) of the cell.

Step 2: and the UE reselects to the target cell with the MBMS function.

The method comprises the steps that idle state or non-activated state UE receiving MBMS service receives RRC information, in the moving process of the UE, measurement of a neighbor cell is triggered according to a cell selection or cell reselection criterion, and when a target cell is evaluated according to a measurement result, the neighbor cell with the MBMS function is preferentially selected as a target cell for cell selection or cell reselection according to whether the neighbor cell has an MBMS function indication.

And if the neighbor cell which meets the cell selection reselection criterion and has the MBMS function exists, the UE is resided to the target cell with the MBMS function.

If no adjacent cell which meets the cell selection reselection criterion and has the MBMS function exists, the UE initiates a unicast bearer establishment process to realize that the target cell continues to receive the MBMS service through unicast bearer.

And step 3: and the UE triggers to enter an RRC connection state and notifies the MBMS service information to the target cell.

And 4, step 4: dynamic MBMS session establishment procedure between target cell and core network.

If residing in the target cell with the MBMS function, the idle state or the non-activated state UE triggers to enter a connected state, reports the information of receiving the MBMS to the target cell, and triggers to request to establish the MBMS session to a core network if the target cell does not establish the corresponding MBMS session.

And after the MBMS session is established, the core network transmits the MBMS service data to the target cell.

Optionally, the core network may have continuity of receiving the MBMS service data by the UE by ensuring synchronization of the MBMS service data transmitted between the target cell and the source cell.

And 5: the target cell sends an RRC message to the UE.

The target cell indicates the MBMS to the UE to start transmission, and the UE continues to receive the corresponding MBMS according to the indication.

Example 2

Referring to fig. 6, the specific steps include step 1 to step 7.

Step 1: the target cell sends an RRC message to the UE.

A UE receiving the MBMS service selects a candidate target cell according to a cell selection or cell reselection criterion during the movement of the UE, and reads an RRC message (e.g., system information) of the candidate target cell.

Optionally, before step 1, the UE receives the MBSM service through the source cell, enters an idle state or an inactive state, and performs reselection evaluation on the target cell.

Step 2: and the UE selects the candidate target cell with the MBMS function.

And the UE judges whether the candidate cell has the MBMS function according to the indication in the RRC message of the candidate target cell, and preferentially selects the adjacent cell with the MBMS function as the target cell for cell selection or cell reselection.

And step 3: the UE camps on the target cell.

And 4, step 4: and the UE triggers to enter an RRC connection state and notifies the MBMS service information to the target cell.

And 5: dynamic MBMS session establishment procedure between target cell and core network.

After residing in a target cell with an MBMS function, the UE in an idle state or an inactive state is triggered to enter a connected state, the information of receiving the MBMS is reported to the target cell, and if the target cell does not establish a corresponding MBMS session, the target cell is triggered to request a core network to establish the MBMS session.

Step 6: the target cell sends an RRC message to the UE.

And 7: and the UE continues to receive the MBMS service.

The target cell indicates the MBMS to start transmission, and the UE continues to receive the corresponding MBMS according to the indication.

Example 3:

referring to fig. 7, the specific steps include step 1 to step 9.

Step 1: and the source cell sends RRC message to the UE, and the RRC message carries measurement configuration.

And the source cell configures adjacent cell measurement for the connected UE according to the MBMS service receiving information of the UE, wherein the adjacent cell measurement comprises the adjacent cell with the MBMS function possibly configured for the UE as much as possible according to the requirement of the UE.

Step 2: and the UE sends RRC information to the source cell and carries the measurement report.

UE measures the adjacent cell in the moving process and sends a measurement report to the source cell;

and step 3: and the source cell sends RRC information to the UE, and the RRC information carries the MBMS capability indication of the switching target cell and the target cell.

The network side selects a switching target cell with the MBMS function as much as possible according to the requirement of the UE, and indicates whether the target cell has the MBMS function in the RRC message.

And 4, step 4: and the source cell informs the MBMS information of the UE to the target cell.

And if the target cell has the MBMS function and does not establish the corresponding MBMS session, triggering to request the core network to establish the MBMS session. And after the MBMS session is established, the core network transmits the MBMS service data to the target cell.

Step 6: the UE camps on the target cell.

And 7: and the UE continues to receive the MBMS service.

If the target cell has the MBMS function, the UE is switched to the target cell and continues to receive the MBMS service under the control of the target cell.

And 8: the UE initiates a unicast PDU session establishment procedure.

And step 9: and the UE continues to receive the MBMS through the unicast PDU session.

If the target cell does not have the MBMS function, the UE initiates a unicast PDU session establishment process to ensure that the MBMS service is continuously received through unicast bearer after the target cell is switched to.

Example 4

Referring to fig. 8, the specific steps include step 1 to step 9.

Step 1: and receiving an RRC message from the source cell, wherein the RRC message carries the measurement configuration and the MBMS capability indication of the adjacent cell.

The method comprises the steps that a source cell configures adjacent cell measurement for connected state UE according to MBMS service receiving information of the UE, wherein the adjacent cell with the MBMS function is configured for the UE possibly as much as possible according to the requirement of the UE, the connected state UE performs the measurement of the adjacent cell under the control of a network, and when the adjacent cell measurement configuration is performed through RRC information sent to the UE by a network side, whether adjacent frequency points and the adjacent cell have the Multicast Broadcast (MBMS) function or not is indicated at the same time.

Before step 1, the UE receives the MBMS service through the source cell.

Step 2: and sending RRC information to the source cell, wherein the RRC information carries the measurement report.

In the moving process, the UE triggers a measurement report according to measurement configuration;

and step 3: an RRC message is received from the source cell, including the handover target cell.

And the network side selects the target cell according to the measurement report and sends the information of the target cell to the UE through RRC message.

And 4, step 4: the UE judges whether the target cell has the MBMS function.

And the UE matches the adjacent cell information in the measurement control according to the target cell information, so that whether the target cell has the MBMS function or not is judged according to the indication in the measurement control information.

If the target cell has the MBMS function, the source cell sends an Xn message to the target cell, namely the source cell informs the target cell of the MBMS information of the UE, and if the target cell has the MBMS function and does not establish the corresponding MBMS session, the source cell triggers to request to establish the MBMS session to a core network. And after the MBMS session is established, the core network transmits the MBMS service data to the target cell.

And 5: the UE camps on the target cell.

Step 6: and the UE continues to receive the MBMS service.

And 7: unicast PDU session establishment procedure.

And 8: and continuously receiving the MBMS service through the unicast PDU session.

Referring to fig. 9, an embodiment of the present application provides an apparatus for maintaining service continuity during a terminal moving process, where the apparatus 900 is applied to a terminal and includes:

a first receiving module 901, configured to receive first information, where the first information indicates whether a first cell has a multicast broadcast MBMS function;

a selecting module 902, configured to preferentially select, according to the first information, the first cell with the MBMS function as a target cell for cell selection or reselection.

In this embodiment of the present application, the first receiving module 901 is further configured to: receiving first information from a source cell, wherein co-frequency cell information or inter-frequency cell reselection information in the first information indicates whether a corresponding frequency point and/or a first cell on the frequency point has an MBMS function;

the selecting module 902 is further configured to: triggering measurement of the neighbor cell according to a cell selection or cell reselection criterion; and preferentially selecting the first cell with the MBMS function as a target cell for cell selection or reselection according to the measurement result and the first information.

In this embodiment of the present application, the first receiving module 901 is further configured to: selecting a first cell according to a cell selection or cell reselection criterion; and acquiring first information of the first cell, wherein the first information indicates whether the first cell has an MBMS function.

In this embodiment, the apparatus 900 further includes:

and the residing module is used for residing the terminal in the first cell with the MBMS function if the first cell has the MBMS function.

In this embodiment, the apparatus 900 further includes:

a reporting module, configured to trigger, before residing in a first cell with an MBMS function, the terminal in an idle state or an inactive state to enter a connected state, report information of an MBMS service being received to a current serving cell, and indicate that the terminal will leave the current cell; or, if the terminal resides in a first cell with an MBMS function, the terminal in an idle state or an inactive state is triggered to enter a connected state, and reports information of receiving an MBMS service to the first cell.

In this embodiment of the present application, the first receiving module 901 is further configured to: receiving a first message from a source cell, the first message comprising: information of a first cell and first information indicating whether the first cell has an MBMS function; wherein the first cell is selected by the source cell according to the measurement report of the terminal and the requirement of the terminal for receiving the MBMS service.

In this embodiment, the apparatus 900 further includes:

a second receiving module, configured to receive a measurement configuration from the source cell, where the measurement configuration is configured by the source cell according to a requirement of the terminal for receiving an MBMS service;

and the first sending module is used for measuring the adjacent cell according to the measurement configuration and sending a measurement report to the source cell.

In this embodiment of the present application, the first receiving module 901 is further configured to: receiving a second message from a source cell, the second message comprising: measurement configuration and first information for neighbor cell measurement, the first information indicating whether a first cell has an MBMS function;

the selecting module 902 is further configured to: receiving a third message from the source cell, wherein the third message carries information of the first cell, and the first cell is selected by the source cell according to the measurement report of the terminal;

In this embodiment, the apparatus 900 further includes:

and the first switching module is used for switching the terminal to the first cell and continuously receiving the MBMS service through the first cell if the first cell has the MBMS function.

In this embodiment, the apparatus 900 further includes:

and a second switching module, configured to initiate a unicast bearer establishment procedure if the first cell does not have the MBMS function, and continue to receive the MBMS service through the unicast bearer after switching to the first cell.

It should be noted that the division of the unit in the embodiment of the present application is schematic, and is only a logic function division, and there may be another division manner in actual implementation. In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented as a software functional unit and sold or used as a stand-alone product, may be stored in a processor readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The apparatus for maintaining service continuity during a terminal moving process provided in the embodiment of the present invention may implement the method embodiment shown in fig. 3, which has similar implementation principles and technical effects, and this embodiment is not described herein again.

Referring to fig. 10, an embodiment of the present application further provides a terminal, where the terminal includes: a processor 1000, a transceiver 1010, a memory 1020, and a user interface 1030.

A transceiver 1010 for receiving and transmitting data under the control of the processor 1000.

Where in fig. 10, the bus architecture may include any number of interconnected buses and bridges, with various circuits being linked together, particularly one or more processors represented by processor 1000 and memory represented by memory 1020. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1000 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over transmission media including wireless channels, wired channels, optical fiber cables, and the like. The user interface 1030 may also be an interface capable of interfacing with a desired device for different user devices, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 1000 is responsible for managing the bus architecture and general processing, and the memory 1020 may store data used by the processor 1000 in performing operations.

Alternatively, the processor 1000 may be a CPU (central processing unit), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or a CPLD (Complex Programmable Logic Device), and the processor may also adopt a multi-core architecture.

The processor is used for executing any one of the methods provided by the embodiment of the application according to the obtained executable instructions by calling the computer program stored in the memory. The processor and memory may also be physically separated.

The terminal provided in the embodiment of the present invention may execute the method embodiment shown in fig. 3, which has similar implementation principles and technical effects, and this embodiment is not described herein again.

Referring to fig. 11, an apparatus for maintaining service continuity during a terminal moving process, applied to an access network side device, the apparatus 1100 includes:

a second sending module 1101, configured to send first information, where the first information indicates whether the first cell has an MBMS function.

In this embodiment of the present application, the second sending module 1101 is further configured to: transmitting first information through a first cell, the first information indicating whether the first cell has a multicast broadcast MBMS function, the first cell being selected by the terminal based on cell selection or cell reselection criteria.

In this embodiment of the present application, the second sending module 1101 is further configured to: transmitting a first message, the first message comprising: information of a first cell and first information indicating whether the first cell has an MBMS function;

optionally, the apparatus 1100 further comprises:

a first obtaining module, configured to obtain a measurement report of the terminal and a requirement of the terminal for receiving an MBMS service;

and the selection module is used for selecting the first cell according to the measurement report of the terminal and the requirement of the terminal for receiving the MBMS service.

In this embodiment of the present application, the second sending module 1101 is further configured to: sending a second message, the second message comprising: measurement configuration and first information for neighbor cell measurement, the first information indicating whether a first cell has an MBMS function;

optionally, the apparatus 1100 further comprises:

a receiving module, configured to receive a measurement report reported by the terminal;

and a third sending module, configured to select a first cell according to the measurement report, and send a third message to the terminal, where the third message carries information of the first cell.

In an embodiment of the present application, the apparatus 1100 further includes:

the second acquisition module is used for acquiring the requirement of the terminal for receiving the MBMS service;

and the request module is used for dynamically starting the transmission of the corresponding MBMS according to the requirement if the transmission of the corresponding MBMS is not started in the first cell.

The apparatus for maintaining service continuity during a terminal moving process provided in the embodiment of the present invention may implement the method embodiment shown in fig. 4, which has similar implementation principles and technical effects, and this embodiment is not described herein again.

Referring to fig. 12, an embodiment of the present invention provides an access network-side device, where the access network-side device includes: memory 1220, transceiver 1210, processor 1200:

a memory 1220 for storing programs;

a transceiver 1210 for receiving and transmitting data under the control of the processor 1200.

A processor 1200 for reading the program in the memory 1220 and performing the following operations: and sending first information, wherein the first information indicates whether the first cell has the MBMS function.

Where in fig. 12, the bus architecture may include any number of interconnected buses and bridges, with various circuits of one or more processors represented by processor 1200 and memory represented by memory 1220 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1210 may be a plurality of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium including wireless channels, wired channels, fiber optic cables, and the like. The processor 1200 is responsible for managing the bus architecture and general processing, and the memory 1220 may store data used by the processor 1200 in performing operations.

The processor 1200 may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), or a Complex Programmable Logic Device (CPLD), and may also have a multi-core architecture.

The access network side device provided in the embodiment of the present invention may execute the method embodiment shown in fig. 4, which has similar implementation principles and technical effects, and is not described herein again.

An embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or the instruction is executed by a processor, the program or the instruction implements each process of the method embodiment shown in fig. 3 or fig. 4, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.

The readable storage medium may be any available medium or data storage device that can be accessed by a processor, including but not limited to magnetic memory (e.g., floppy disks, hard disks, magnetic tape, magneto-optical disks (MOs), etc.), optical memory (e.g., CDs, DVDs, BDs, HVDs, etc.), and semiconductor memory (e.g., ROMs, EPROMs, EEPROMs, nonvolatile memory (NAND FLASH), Solid State Disks (SSDs)), etc.

The steps of a method or algorithm described in connection with the disclosure herein may be embodied in hardware or in software instructions executed by a processor. The software instructions may consist of corresponding software modules that may be stored in RAM, flash memory, ROM, EPROM, EEPROM, registers, hard disk, a removable hard disk, a compact disk, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an ASIC. Additionally, the ASIC may reside in a core network interface device. Of course, the processor and the storage medium may reside as discrete components in a core network interface device.

Those skilled in the art will recognize that in one or more of the examples described above, the functions described herein may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

The above-mentioned embodiments, objects, technical solutions and advantages of the present application are further described in detail, it should be understood that the above-mentioned embodiments are only examples of the present application, and are not intended to limit the scope of the present application, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the present application should be included in the scope of the present application.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, embodiments of the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

Embodiments of the present application are described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to encompass such modifications and variations.

Claims

1. A method for keeping service continuity in the terminal moving process is applied to a terminal, and is characterized by comprising the following steps:

2. The method of claim 1, wherein receiving the first information comprises:

3. The method of claim 1, wherein receiving the first information comprises:

4. A method according to claim 2 or 3, characterized in that the method further comprises:

5. The method of claim 4, further comprising:

6. The method of claim 4, further comprising:

7. The method of claim 1, wherein receiving the first information comprises:

8. The method of claim 7, further comprising:

9. The method of claim 1, wherein receiving the first information comprises:

10. The method according to claim 8 or 9, characterized in that the method further comprises:

11. The method of claim 2 or 3 or 8 or 9, further comprising:

12. A method for keeping service continuity in the process of terminal movement is applied to access network side equipment, and is characterized by comprising the following steps:

13. The method according to claim 12, wherein the intra-frequency cell information or inter-frequency cell reselection information in the first information indicates whether the corresponding frequency point and/or the first cell on the frequency point has the MBMS function.

14. The method of claim 12, wherein sending first information indicating whether the first cell is MBMS-capable comprises:

transmitting first information through a first cell, the first information indicating whether the first cell has a multicast broadcast MBMS function, the first cell being selected by the terminal based on cell selection or cell reselection criteria.

15. The method of claim 12, wherein sending first information indicating whether the first cell is MBMS-capable comprises:

prior to sending the first message, the method further comprises:

16. The method of claim 12, wherein sending first information indicating whether the first cell is MBMS-capable comprises:

after sending the second message, the method further comprises:

receiving a measurement report reported by the terminal;

17. The method according to any one of claims 12 to 15, further comprising:

acquiring the requirement of the terminal for receiving the MBMS service;

18. The method of claim 17, wherein the initiating transmission of the corresponding MBMS service comprises:

establishing corresponding MBMS bearing;

19. A device for maintaining service continuity in a terminal moving process is applied to a terminal, and is characterized by comprising the following steps:

20. A terminal, comprising: a processor, a transceiver, and a memory;

21. A device for keeping service continuity in the process of terminal movement is applied to access network side equipment, and is characterized by comprising the following steps:

22. An access network-side device, comprising: a processor, a transceiver, and a memory;

23. A readable storage medium, characterized in that it has stored thereon a program which, when being executed by a processor, carries out steps comprising the method according to any one of claims 1 to 16.