WO2021249477A1

WO2021249477A1 - Multicast service switching method and device

Info

Publication number: WO2021249477A1
Application number: PCT/CN2021/099353
Authority: WO
Inventors: 谢振华; 张艳霞
Original assignee: 维沃移动通信有限公司
Priority date: 2020-06-11
Filing date: 2021-06-10
Publication date: 2021-12-16
Also published as: CN113810956B; CN113810956A

Abstract

Disclosed in the present application are a multicast service switching method and device. The method comprises: receiving relevant information of a multicast service sent by a source base station; and sending multicast service data to a target base station according to the relevant information of the multicast service.

Description

Method and equipment for switching multicast service

Cross-references to related applications

This application claims the priority of Chinese Patent Application No. 202010532087.2 filed in China on June 11, 2020, the entire content of which is incorporated herein by reference.

Technical field

This application belongs to the field of communication technology, and specifically relates to a method and device for switching multicast services.

Background technique

When the terminal receives multicast service data, if the terminal moves from the source base station to the target base station, the source base station can forward the multicast service data to the target base station, and the target base station determines whether the source base station multicast service data needs to be forwarded to the terminal.

When the target base station judges that the forwarding is unnecessary, the source base station cannot be notified to end the forwarding, and the source base station can only end the forwarding after a period of time. As a result, the multicast service data may be lost when the terminal moves from the source base station to the target base station.

Summary of the invention

The purpose of the embodiments of this application is to provide a method and device for switching multicast services, which can solve the problem of the loss of multicast service data if the terminal moves from the source base station to the target base station when the terminal receives multicast service data. .

In order to solve the above technical problems, this application is implemented as follows:

In the first aspect, a method for switching multicast services is provided, which is applied to core network functions, including:

Receiving the relevant information of the multicast service sent by the source base station;

According to the related information of the multicast service, the multicast service data is sent to the target base station.

In the second aspect, a method for switching multicast services is provided, which is applied to a source base station, and includes:

Sending the relevant information of the multicast service to the core network function, where the relevant information of the multicast service is used by the core network function to send the multicast service data to the target base station.

In the third aspect, a device for switching multicast services is provided, which is applied to core network functions, including:

The receiving module is used to receive the related information of the multicast service sent by the source base station;

The first sending module is configured to send multicast service data to the target base station according to the related information of the multicast service.

In a fourth aspect, a device for switching multicast services is provided, which is applied to a source base station, and includes:

The fourth sending module is configured to send relevant information of the multicast service to the core network function, and the relevant information of the multicast service is used by the core network function to send the multicast service data to the target base station.

In a fifth aspect, a core network function is provided, including a processor, a memory, and a program or instruction stored on the memory and running on the processor. When the program or instruction is executed by the processor, The steps of the method for switching multicast services as described in the first aspect are implemented.

In a sixth aspect, a base station is provided, including a processor, a memory, and a program or instruction stored on the memory and capable of being run on the processor. When the program or instruction is executed by the processor, the implementation is as follows: The steps of the method for switching multicast services described in the second aspect.

In a seventh aspect, a readable storage medium is provided, and a program or instruction is stored on the readable storage medium. When the program or instruction is executed by a processor, the method for switching multicast services as described in the first aspect is implemented. Step, or the step of implementing the method for switching multicast services as described in the second aspect.

In an eighth aspect, a chip is provided. The chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run a network-side device program or instruction to implement the same as described in the first aspect. The steps of the method for switching multicast services as described above, or the steps of implementing the method for switching multicast services as described in the second aspect.

In the embodiments of the present application, after the terminal moves to the target base station, it can send multicast service data to the target base station through the core network function, thereby realizing the lossless forwarding of the multicast data, and avoiding the time when the terminal moves from the source base station to the target base station. Broadcast business data may be lost.

Description of the drawings

Fig. 1 is a block diagram of a wireless communication system to which an embodiment of the present application can be applied;

FIG. 2 is one of the flowcharts of the method for switching multicast services according to an embodiment of the present application;

FIG. 3 is the second flowchart of the method for switching multicast services according to an embodiment of the present application;

FIG. 4 is the third flowchart of the method for switching multicast services according to an embodiment of the present application;

FIG. 5 is one of the schematic diagrams of the device for switching multicast services according to an embodiment of the present application;

Fig. 6 is a second schematic diagram of the device for switching multicast services according to an embodiment of the present application;

Fig. 7 is a schematic diagram of a communication device according to an embodiment of the present application.

detailed description

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

The terms "first" and "second" in the specification and claims of this application are used to distinguish similar objects, but not to describe a specific sequence or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first" and "second" It is usually one type, and the number of objects is not limited. For example, the first object may be one or more. In addition, "and/or" in the description and claims means at least one of the connected objects, and the character "/" generally means that the associated objects before and after are in an "or" relationship.

It is worth noting that the technology described in the embodiments of this application is not limited to Long Term Evolution (LTE)/LTE-Advanced (LTE-A) systems, and can also be used in other wireless communication systems, such as code Division Multiple Access (Code Division Multiple Access, CDMA), 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 (SC-FDMA) and other systems. The terms "system" and "network" in the embodiments of this application are often used interchangeably, and the described technology can be used for the above-mentioned systems and radio technologies as well as other systems and radio technologies. However, the following description describes the New Radio (NR) system for exemplary purposes, and uses NR terminology in most of the description below, although these technologies can also be applied to applications other than NR system applications, such as the 6th generation ( 6 ^th Generation, 6G) communication system.

Fig. 1 shows a block diagram of a wireless communication system to which an embodiment of the present application can be applied. The wireless communication system includes a terminal 11 and a network side device 12. Among them, the terminal 11 may also be referred to as a terminal device or a user terminal (User Equipment, UE), and the terminal 11 may be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), or a notebook computer or a personal digital device. Assistant (Personal Digital Assistant, PDA), handheld computer, netbook, ultra-mobile personal computer (UMPC), mobile Internet device (Mobile Internet Device, MID), wearable device (Wearable Device) or in-vehicle device Terminal-side devices such as Vehicle User Equipment (VUE) and Pedestrian User Equipment (PUE), and wearable devices include: bracelets, headsets, glasses, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 may be a base station or a core network, where the base station may be called Node B, Evolved Node B, Access Point, Base Transceiver Station (BTS), radio base station, radio transceiver, basic service Set (Basic Service Set, BSS), Extended Service Set (Extended Service Set, ESS), Node B, Evolved Node B (eNB), Home Node B, Home Evolved Node B, WLAN Access Point, WiFi Node, Sending Transmitting Receiving Point (TRP) or some other suitable term in the field, as long as the same technical effect is achieved, the base station is not limited to a specific technical vocabulary. It should be noted that in the embodiments of this application, only The base station in the NR system is taken as an example, but the specific type of the base station is not limited.

In the following, the method for switching multicast services provided by the embodiments of the present application will be described in detail through specific embodiments and application scenarios with reference to the accompanying drawings.

Referring to Figure 2, an embodiment of the present application provides a method for switching multicast services. The execution subject of the method may be a core network function (or called a core network element), for example, access and mobility management functions (Access and Mobility Management). Management Function (AMF), Session Management Function (SMF), or User Plane Function (UPF) are of course not limited to this, and the specific steps include: step 201 and step 202.

Step 201: Receive related information about the multicast service sent by the source base station;

Specifically, the related information of the multicast service may be a sequence number related to the multicast service, for example, each service flow or temporary group of the multicast service corresponds to a sequence number.

Step 202: Send the multicast service data to the target base station according to the related information of the multicast service.

Optionally, the core network function may determine the multicast service data that the source base station has sent to the UE based on the relevant information of the multicast service, and/or determine the multicast service data that the target base station needs to re-send to the UE, based on the above determination Content, send multicast service data to the target base station.

The foregoing multicast service data can be understood as the multicast service data that the UE did not receive due to interruption of reception during the handover from the source base station to the target base station, that is, the reissued multicast service data, so that the target base station can use the multicast service data. Reissue to the UE to avoid the problem that multicast service data may be lost when the terminal moves from the source base station to the target base station.

In the embodiment of this application, the core network function can determine which multicast service data the source base station has sent to the UE based on the relevant information of the multicast service provided by the source base station (such as the sequence number of the multicast service). The relevant information of the broadcast service can determine which multicast service data needs to be reissued to the UE through the target base station. The UE is switched from the source base station to the target base station due to interruption of reception and did not receive the multicast service data through this reissue to make the UE The received multicast service data will not be less.

Exemplarily, acquiring the forwarding resource of the target base station; according to the related information of the multicast service, sending the multicast service data to the target base station through the forwarding resource.

In some implementation manners, before sending the multicast service data to the target base station according to the related information of the multicast service, the method shown in FIG. 2 may further include:

According to the related information of the multicast service, a forwarding instruction of the multicast service data is sent to the target base station, where the forwarding instruction is used to instruct the target base station to reserve forwarding resources.

In some implementation manners, after the multicast service data is sent to the target base station according to the related information of the multicast service, the method shown in FIG. 2 may further include:

Sending instruction information to the target base station, where the instruction information indicates that the multicast service data transmission ends.

In some embodiments, the multicast service data includes one or more of the following combinations: (1) multicast service data buffered by the core network function; (2) multicast service data received by the core network function data.

Referring to FIG. 3, an embodiment of the present application provides a method for switching multicast services. The execution subject of the method may be a source base station, and the specific steps include: step 301.

Step 301: Send relevant information of the multicast service to the core network function, where the relevant information of the multicast service is used by the core network function to send the multicast service data to the target base station.

Specifically, the related information of the multicast service may be a sequence number related to the multicast service.

Referring to FIG. 4, the specific steps include: step 401 to step 411.

Step 401: The core network multicast broadcast network function (Multicast Broadcast Network Function, MB NF) sends multicast data to the source base station (Source gNB);

The foregoing core network multicast broadcast network function may be a user plane function (User Plane Function, UPF), an access and mobility management function (Access and Mobility Management Function, AMF), or a session management function (Session Management Function, SMF).

The foregoing multicast data may carry service-related information, for example, each service flow or temporary group corresponds to a serial number.

Step 402: Source gNB sends a handover notification message to the multicast broadcast network function;

Exemplarily, Source gNB sends a handover notification message to AMF or SMF. For example, when MB NF is SMF, it is sent to SMF through AMF, and when MB NF is AMF, it is directly sent to AMF.

Optionally, the handover notification message (such as a handover required (Handover Required) message) carries an identifier of the service to be handed over, such as QoS Flow Identifier (QFI) or Temporary Mobile Group Identity (TMGI) or Protocol data unit session ID (PDU Session ID). Further, the handover notification message may also carry related information of the multicast service, such as serial number (Serial Number, SN).

Step 403: MB NF sends a handover request (Handover Request) message to the target base station (Target gNB);

Wherein, the handover request message may carry a multicast service related identifier, such as TMGI and/or MB NF identifier; further, the handover request message may also carry an indication whether forwarding is required.

Step 404: The target base station reserves forwarding resources, or reserves forwarding resources according to a forwarding instruction, and the target base station may also reserve downlink tunnel resources for multicast service data.

Step 405: The target base station returns a Handover Response (Handover Response) message to the MB NF;

Among them, the Handover Response message can carry the downlink tunnel resources of the multicast service data, which are used by the MB NF to send the multicast service data to the target base station; further, the Handover Response message can also carry forwarding resources, which are used by the MB NF to send additional resources to the target base station. Multicast business data.

Step 406: MB NF receives the forwarding resource, and continues to send the buffered data to the target base station through the forwarding resource according to the received sequence number, so that the UE can continue to receive subsequent data after accessing the target base station without losing part of the data .

Step 407: The MB NF sends a Handover Command (Handover Command) message to the source base station.

Step 408: The source base station sends a handover command message to the user terminal UE.

Step 409: The UE accesses the target base station and sends a Handover Complete (Handover Confirm) message to the target base station.

Step 410: The target base station sends a session update message to the MBNF;

It should be noted that if the multicast downlink tunnel information is not sent in step 405, then it is sent in this step.

Step 411: The MB NF sends the received multicast service data to the target base station through the multicast downlink tunnel.

For example, after the UPF sends all the buffered data through the forwarding resource, it sends an end message to the forwarding tunnel, and the target base station releases the forwarding resource after receiving the end message, and stops sending the received forwarded data.

It should be noted that, in the method for switching multicast services provided in the embodiments of the present application, the executor may be the device for switching multicast services, or the device for switching multicast services in the device for switching multicast services is used to execute the method for switching multicast services Control module. In the embodiment of the present application, the method for switching the multicast service performed by the apparatus for switching the multicast service is taken as an example to illustrate the apparatus for switching the multicast service provided in the embodiment of the present application.

Referring to FIG. 5, an embodiment of the present invention provides a device for switching multicast services, which is applied to core network functions, and the device 500 includes:

The receiving module 501 is configured to receive related information about the multicast service sent by the source base station;

The first sending module 5702 is configured to send multicast service data to the target base station according to the related information of the multicast service.

In some embodiments, the device 500 further includes:

The second sending module is configured to send a forwarding instruction of the multicast service data to the target base station according to the related information of the multicast service, where the forwarding instruction is used to instruct the target base station to reserve forwarding resources.

In some embodiments, the first sending module 502 includes:

An obtaining unit, configured to obtain forwarding resources of the target base station;

The sending unit is configured to send the multicast service data to the target base station through the forwarding resource according to the related information of the multicast service.

In some embodiments, the device 500 further includes:

The third sending module is configured to send indication information to the target base station, where the indication information indicates the end of sending the multicast service data.

In some embodiments, the multicast service data includes one or more of the following combinations:

(1) Multicast service data cached by the core network function;

(2) Multicast service data received by the core network function.

The device for switching multicast services provided by the embodiment of the present application can implement each process implemented by the method embodiment in FIG. 2 and achieve the same technical effect. To avoid repetition, details are not described herein again.

Referring to FIG. 6, an embodiment of the present invention provides a device for switching multicast services, which is applied to a source base station, and the device 600 includes:

The fourth sending module 601 is configured to send relevant information of the multicast service to the core network function, and the relevant information of the multicast service is used for the core network function to send the multicast service data to the target base station.

The device for switching multicast services provided by the embodiment of the present application can implement each process implemented by the method embodiment shown in FIG. 3 and achieve the same technical effect. In order to avoid repetition, details are not repeated here.

As shown in FIG. 7, an embodiment of the present application further provides a communication device 700, including a processor 701, a memory 702, and a program or instruction stored on the memory 702 and running on the processor 701, for example, the communication When the device 700 is a core network function, when the program or instruction is executed by the processor 701, each process of the method embodiment shown in FIG. 2 is realized, and the same technical effect can be achieved. When the communication device 700 is a network side device, when the program or instruction is executed by the processor 701, each process of the method embodiment shown in FIG. 3 can be realized, and the same technical effect can be achieved. To avoid repetition, details are not described herein again.

The embodiment of the present application also provides a readable storage medium, the readable storage medium stores a program or instruction, and when the program or instruction is executed by a processor, each process of the method embodiment shown in FIG. 2 or FIG. 3 is realized. , And can achieve the same technical effect, in order to avoid repetition, I will not repeat it here.

Wherein, the processor is the processor in the terminal described in the foregoing embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disks, or optical disks.

An embodiment of the present application further provides a chip, the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run a network-side device program or instruction to implement the above-mentioned FIG. 2 or The various processes of the method embodiment shown in FIG. 3 can achieve the same technical effect. In order to avoid repetition, details are not repeated here.

It should be understood that the chip mentioned in the embodiment of the present application may also be called a system-level chip, a system-on-chip, a system-on-chip, or a system-on-chip, etc.

It should be noted that in this article, the terms "include", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, It also includes other elements that are not explicitly listed, or elements inherent to the process, method, article, or device. If there are no more restrictions, the element defined by the sentence "including a..." does not exclude the existence of other identical elements in the process, method, article, or device that includes the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved. The functions are performed, for example, the described method may be performed in an order different from the described order, and various steps may also be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

Through the description of the above implementation manners, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases the former is better.的实施方式。 Based on this understanding, the technical solution of this application essentially or the part that contributes to the existing technology can be embodied in the form of a software product, and the computer software product is stored in a storage medium (such as ROM/RAM, magnetic disk, The optical disc) includes several instructions to make a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) execute the methods described in the various embodiments of the present application.

The embodiments of the present application are described above with reference to the accompanying drawings, but the present application is not limited to the above-mentioned specific embodiments. The above-mentioned specific embodiments are only illustrative and not restrictive. Those of ordinary skill in the art are Under the enlightenment of this application, many forms can be made without departing from the purpose of this application and the scope of protection of the claims, all of which fall within the protection of this application.

Claims

A method for switching multicast services, applied to core network functions, including:

Receiving the relevant information of the multicast service sent by the source base station;

According to the related information of the multicast service, the multicast service data is sent to the target base station.
The method according to claim 1, wherein, before the sending the multicast service data to the target base station according to the related information of the multicast service, the method further comprises:

According to the related information of the multicast service, a forwarding instruction of the multicast service data is sent to the target base station, where the forwarding instruction is used to instruct the target base station to reserve forwarding resources.
The method according to claim 1, wherein the sending the multicast service data to the target base station according to the related information of the multicast service comprises:

Acquiring forwarding resources of the target base station;

According to the related information of the multicast service, the multicast service data is sent to the target base station through the forwarding resource.
The method according to claim 1, wherein after the sending the multicast service data to the target base station according to the related information of the multicast service, the method further comprises:

Sending instruction information to the target base station, where the instruction information indicates that the multicast service data transmission ends.
The method according to claim 1, wherein the multicast service data includes one or a combination of the following:

The multicast service data buffered by the core network function;

The multicast service data received by the core network function.
A method for switching multicast services, applied to a source base station, includes:

Sending the relevant information of the multicast service to the core network function, where the relevant information of the multicast service is used by the core network function to send the multicast service data to the target base station.
A device for switching multicast services, applied to core network functions, including:

The receiving module is used to receive the related information of the multicast service sent by the source base station;

The first sending module is configured to send multicast service data to the target base station according to the related information of the multicast service.
The device according to claim 7, further comprising:

The second sending module is configured to send a forwarding instruction of the multicast service data to the target base station according to the related information of the multicast service, where the forwarding instruction is used to instruct the target base station to reserve forwarding resources.
The device according to claim 7, wherein the first sending module comprises:

An obtaining unit, configured to obtain forwarding resources of the target base station;

The sending unit is configured to send the multicast service data to the target base station through the forwarding resource according to the related information of the multicast service.
The device according to claim 7, further comprising:

The third sending module is configured to send indication information to the target base station, where the indication information indicates the end of sending the multicast service data.
The apparatus according to claim 7, wherein the multicast service data includes one or a combination of the following:

The multicast service data buffered by the core network function;

Multicast service data received by the core network function.
A device for switching multicast services, applied to a source base station, includes:

The fourth sending module is configured to send relevant information of the multicast service to the core network function, and the relevant information of the multicast service is used by the core network function to send the multicast service data to the target base station.
A core network function, including a processor, a memory, and a program or instruction that is stored on the memory and can run on the processor. When the program or instruction is executed by the processor, it is implemented as claimed in claims 1 to 5. Steps of any of the methods for switching multicast services.
A base station, comprising a processor, a memory, and a program or instruction stored on the memory and capable of being run on the processor, and the program or instruction is executed by the processor to implement the method described in claim 6 Steps of the method of switching multicast services.
A readable storage medium storing a program or instruction on the readable storage medium, and when the program or instruction is executed by a processor, the steps of the method for switching multicast services according to any one of claims 1 to 5 are realized , Or implement the steps of the method for switching multicast services as described in claim 6.
A chip comprising a processor and a communication interface, the communication interface is coupled with the processor, and the processor is used to run a network-side device program or instruction to implement the method according to any one of claims 1 to 5 The method for switching multicast services, or the method for switching multicast services as described in claim 6.
A computer program product, which is executed by at least one processor to implement the method for switching multicast services according to any one of claims 1 to 5, or to implement the switching multicast according to claim 6 Business approach.
A core network function configured to execute the method for switching multicast services according to any one of claims 1-5.
A base station configured to perform the method for switching multicast services according to claim 6.