CN113810956B - Method and device for switching multicast service - Google Patents

Method and device for switching multicast service Download PDF

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Publication number
CN113810956B
CN113810956B CN202010532087.2A CN202010532087A CN113810956B CN 113810956 B CN113810956 B CN 113810956B CN 202010532087 A CN202010532087 A CN 202010532087A CN 113810956 B CN113810956 B CN 113810956B
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multicast service
base station
service data
target base
sent
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CN113810956A (en
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谢振华
张艳霞
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Vivo Mobile Communication Co Ltd
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Vivo Mobile Communication Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0007—Control or signalling for completing the hand-off for multicast or broadcast services, e.g. MBMS
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/22—Performing reselection for specific purposes for handling the traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The application discloses a method and equipment for switching multicast services, which belong to the technical field of communication, and the method comprises the following steps: receiving related information of multicast service sent by a source base station; and sending multicast service data to a target base station according to the related information of the multicast service. In the embodiment of the application, the multicast service data can be sent to the target base station through the core network function after the terminal moves to the target base station, so that the lossless forwarding of the multicast service data is realized, and the problem that the multicast service data is possibly lost when the terminal moves from the source base station to the target base station is avoided.

Description

Method and device for switching multicast service
Technical Field
The present application belongs to the field of communications technologies, and in particular, to a method and an apparatus for switching a multicast service.
Background
When the terminal receives the 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 judges whether the multicast service data of the source base station needs to be continuously forwarded to the terminal.
When the target base station judges that the forwarding is not needed, the target base station cannot inform the source base station of finishing the forwarding, and only can the source base station finish the forwarding automatically after the forwarding is carried out for a period of time. This may result in multicast traffic data being lost while the terminal moves from the source base station to the target base station.
Disclosure of Invention
The embodiment of the application aims to provide a method and equipment for switching a multicast service, which can solve the problem that the multicast service data is lost if a terminal moves from a source base station to a target base station when the terminal receives the multicast service data.
In order to solve the technical problem, the present application is implemented as follows:
in a first aspect, a method for switching a multicast service is provided, which is applied to a core network function, and includes:
receiving related information of multicast service sent by a source base station;
and sending multicast service data to a target base station according to the related information of the multicast service.
In a second aspect, a method for switching a multicast service is provided, and is applied to a source base station, and includes:
and sending related information of the multicast service to a core network function, wherein the related information of the multicast service is used for sending multicast service data to a target base station by the core network function.
In a third aspect, a device for switching a multicast service is provided, which is applied to a core network function, and includes:
the receiving module is used for receiving the relevant information of the multicast service sent by the source base station;
and the first sending module is used for sending the multicast service data to the target base station according to the relevant information of the multicast service.
In a fourth aspect, an apparatus for switching a multicast service is provided, where the apparatus is applied to a source base station, and the apparatus includes:
and the fourth sending module is used for sending the relevant information of the multicast service to the core network function, wherein the relevant information of the multicast service is used for sending the multicast service data to the target base station by the core network function.
In a fifth aspect, a core network function is provided, comprising a processor, a memory and a program or instructions stored on the memory and executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method for switching multicast services according to the first aspect.
In a sixth aspect, there is provided a base station comprising a processor, a memory and a program or instructions stored on the memory and executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method of switching multicast services according to the second aspect.
In a seventh aspect, a readable storage medium is provided, on which a program or instructions are stored, which when executed by a processor implement the steps of the method for switching multicast services according to the first aspect, or implement the steps of the method for switching multicast services according to the second aspect.
In an eighth aspect, a chip is provided, where the chip includes a processor and a communication interface, where the communication interface is coupled to the processor, and the processor is configured to execute a network-side device program or instruction to implement the steps of the method for switching a multicast service according to the first aspect, or to implement the steps of the method for switching a multicast service according to the second aspect.
In the embodiment of the application, the multicast service data can be sent to the target base station through the core network function after the terminal moves to the target base station, so that lossless forwarding of the multicast service data is realized, and the problem that the multicast service data can be lost when the terminal moves from the source base station to the target base station is avoided.
Drawings
FIG. 1 is a block diagram of a wireless communication system to which embodiments of the present application are applicable;
fig. 2 is a flowchart of a method for switching a multicast service according to an embodiment of the present application;
fig. 3 is a second flowchart of a method for switching multicast services according to an embodiment of the present application;
fig. 4 is a third flowchart of a method for switching a multicast service according to an embodiment of the present application;
fig. 5 is a schematic diagram of an apparatus for switching a multicast service according to an embodiment of the present application;
fig. 6 is a second schematic diagram of an apparatus 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 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 obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used are interchangeable under appropriate circumstances such that embodiments of the application can be practiced in sequences other than those illustrated or described herein, and the terms "first" and "second" used herein generally do not denote any order, nor do they denote any order, for example, the first object may be one or more. In addition, "and/or" in the specification and the claims means at least one of connected objects, and a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
It is noted that the techniques described in the embodiments of the present application are not limited to Long Term Evolution (LTE)/LTE-Advanced (LTE-a) systems, but may also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), time Division Multiple Access (TDMA), frequency Division Multiple Access (FDMA), 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 the present application are often used interchangeably, and the described techniques can be used for both the above-mentioned systems and radio technologies, as well as for other systems and radio technologies. However, the following description describes a New Radio (NR) system for exemplary purposes, and NR terminology is used in much of the description below, although the techniques may also be applied to applications other than NR system applications, such as 6 th generation (6 th generation) NR systems th Generation, 6G) communication system.
Fig. 1 shows a block diagram of a wireless communication system to which embodiments of the present application are applicable. The wireless communication system includes a terminal 11 and a network-side device 12. Wherein, the terminal 11 may also be called as a terminal Device or a User Equipment (UE), the terminal 11 may be a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer) or a notebook Computer, a Personal Digital Assistant (PDA), a palmtop Computer, a netbook, a super-Mobile Personal Computer (UMPC), a Mobile Internet Device (MID), a Wearable Device (Wearable Device) or a vehicle-mounted Device (VUE), a pedestrian terminal (PUE), and other terminal side devices, the Wearable Device includes: bracelets, earphones, glasses and the like. It should be noted that the embodiment of the present application does not limit the specific type of the terminal 11. The network-side device 12 may be a Base Station or a core network, where the Base Station may be referred to as a node B, an evolved node B, an access Point, a Base Transceiver Station (BTS), a radio Base Station, a radio Transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a node B, an evolved node B (eNB), a home node B, a WLAN access Point, a WiFi node, a Transmit Receiving Point (TRP), or some other suitable terminology in the field, as long as the same technical effect is achieved, the Base Station is not limited to a specific technical vocabulary, and it should be noted that, in the embodiment of the present application, only the Base Station in the NR system is taken as an example, but a specific type of the Base Station is not limited.
The method for switching multicast services provided in the embodiments of the present application is described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.
Referring to fig. 2, an execution subject of the method may be a core network Function (or referred to as a core network element), such as an Access and Mobility Management Function (AMF), a Session Management Function (SMF), or a User Plane Function (UPF), and of course, the method is not limited thereto, and the specific steps include: step 201 and step 202.
Step 201: receiving related information of multicast service sent by a source base station;
specifically, the related information of the multicast service may be a serial number related to the multicast service, for example, a serial number corresponds to each service flow or temporary group of the multicast service.
Step 202: and sending multicast service data to a target base station according to the related information of the multicast service.
Optionally, the core network function may determine, according to the relevant information of the multicast service, the multicast service data that has been sent to the UE by the source base station, and/or determine the multicast service data that needs to be supplemented to the UE by the target base station, and send the multicast service data to the target base station based on the determined content.
The multicast service data can be understood as multicast service data which is not received due to interrupted reception in the process of switching the UE from the source base station to the target base station, namely multicast service data which is sent additionally, so that the target base station can send the multicast service data to the UE additionally, and the problem that the multicast service data is possibly lost when the terminal moves from the source base station to the target base station is avoided.
In the embodiment of the present application, the core network function may determine, according to the related information of the multicast service (for example, a serial number of the multicast service) provided by the source base station, which multicast service data has been sent by the source base station to the UE, and the core network function may determine, according to the related information of the multicast service, which multicast service data needs to be retransmitted to the UE by the target base station, and the multicast service data that is not received due to interrupted reception in the process of switching the UE from the source base station to the target base station is retransmitted by the UE.
Exemplarily, obtaining a forwarding resource of the target base station; and sending 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, before the sending multicast service data to the target base station according to the information related to the multicast service, the method shown in fig. 2 may further include:
and sending a forwarding instruction of the multicast service data to the target base station according to the relevant information of the multicast service, wherein the forwarding instruction is used for indicating the target base station to reserve forwarding resources.
In some embodiments, after the sending multicast service data to the target base station according to the information related to the multicast service, the method shown in fig. 2 may further include:
and sending indication information to the target base station, wherein the indication information indicates that the multicast service data is sent to the end.
In some embodiments, the multicast traffic data includes one or more of the following in combination: (1) multicast service data cached by the core network function; (2) And the core network function receives the multicast service data.
In the embodiment of the application, the multicast service data can be sent to the target base station through the core network function after the terminal moves to the target base station, so that lossless forwarding of the multicast service data is realized, and the problem that the multicast service data can be lost when the terminal moves from the source base station to the target base station is avoided.
Referring to fig. 3, an execution subject of the method may be a source base station, and the method includes the specific steps of: step 301.
Step 301: and sending related information of the multicast service to a core network function, wherein the related information of the multicast service is used for sending multicast service data to a target base station by the core network function.
Specifically, the information related to the multicast service may be a serial number related to the multicast service.
The multicast service data can be understood as multicast service data which is not received due to interrupted reception in the process of switching the UE from the source base station to the target base station, namely multicast service data which is sent additionally, so that the target base station can send the multicast service data to the UE additionally, and the problem that the multicast service data is possibly lost when the terminal moves from the source base station to the target base station is avoided.
In the embodiment of the application, the multicast service data can be sent to the target base station through the core network function after the terminal moves to the target base station, so that lossless forwarding of the multicast service data is realized, and the problem that the multicast service data can be lost when the terminal moves from the source base station to the target base station is avoided.
Referring to fig. 4, the specific steps include: step 401 to step 411.
Step 401: a core network multicast broadcast network function (MB NF) sends multicast data to a Source base station (Source gNB);
the core network multicast broadcast network Function may be a User Plane Function (UPF), an Access and Mobility Management Function (AMF), or a Session Management Function (SMF).
The multicast data may carry service-related information, such as a sequence number corresponding to each service flow or temporary group.
Step 402: the Source gNB sends a switching notification message to the multicast broadcast network function;
illustratively, the Source gNB sends the handover notification message to the AMF or the SMF, for example, if the MB NF is the SMF, the handover notification message is sent to the SMF through the AMF, and if the MB NF is the AMF, the handover notification message is directly sent to the AMF.
Optionally, the Handover notification message (e.g., a Handover request message) carries an Identifier of a service to be handed over, such as a QoS Flow Identifier (QFI) or a Temporary Mobile Group Identifier (TMGI) or a protocol data unit Session Identifier (PDU Session ID), and further, the Handover notification message may also carry related information of the multicast service, such as a Sequence Number (SN).
Step 403: the MB NF sends a switching Request (Handover Request) message to a Target base station (Target gNB);
the handover request message may carry a multicast service related identifier, such as an identifier of the TMGI and/or the MB NF; further, the handover request message may also carry an indication of whether forwarding is required.
Step 404: the target base station reserves the forwarding resource, or reserves the forwarding resource according to the forwarding indication, and the target base station can also reserve the downlink tunnel resource of the multicast service data.
Step 405: the target base station returns a Handover Response (Handover Response) message to the MB NF;
the Handover Response message can carry downlink tunnel resources of multicast service data and is used for the MB NF to send the multicast service data to a target base station; further, the Handover Response message may also carry forwarding resources, which are used for the MB NF to send additional multicast service data to the target base station.
Step 406: the MB NF receives the forwarding resource, and continuously transmits the cached data to the target base station through the forwarding resource according to the received serial number, so that the UE can continuously receive the subsequent data without losing part of the data after accessing the target base station.
Step 407: the MB NF sends a Handover Command (Handover Command) message to the source base station.
Step 408: and the source base station sends a switching command message to the user terminal UE.
Step 409: the UE accesses to 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 MB NF;
it should be noted that, if the multicast downlink tunnel information is not sent in step 405, this step is sent.
Step 411: and the MB NF sends the received multicast service data to the target base station through the multicast downlink tunnel.
For example, after all the cached data is sent through the forwarding resources, the UPF sends an end message to the forwarding tunnel, and the target base station releases the forwarding resources after receiving the end message and stops sending the received forwarding data.
It should be noted that, in the method for switching a multicast service provided in the embodiment of the present application, the executing entity may be a device for switching a multicast service, or a control module in the device for switching a multicast service, which is used for executing the method for switching a multicast service. In the embodiment of the present application, a method for executing a multicast service switching by a device for switching a multicast service is taken as an example, and a device for switching a multicast service provided in the embodiment of the present application is described.
Referring to fig. 5, an embodiment of the present invention provides an apparatus for switching a multicast service, where the apparatus 500 is applied to a core network function, and includes:
a receiving module 501, configured to receive information related to a multicast service sent by a source base station;
specifically, the information related to the multicast service may be a serial number related to the multicast service.
A first sending module 5702, configured to send multicast service data to a target base station according to the relevant information of the multicast service.
In some embodiments, the apparatus 500 further comprises:
a second sending module, configured to send, according to the relevant information of the multicast service, a forwarding indication of the multicast service data to the target base station, where the forwarding indication is used to indicate that the target base station reserves a forwarding resource.
In some embodiments, the first sending module 502 comprises:
an obtaining unit, configured to obtain a forwarding resource of the target base station;
and the sending unit is used for sending the multicast service data to the target base station through the forwarding resource according to the relevant information of the multicast service.
In some embodiments, the apparatus 500 further comprises:
a third sending module, configured to send indication information to the target base station, where the indication information indicates that the multicast service data is sent to the end.
In some embodiments, the multicast service data includes one or more of the following:
(1) Multicast service data cached by the core network function;
(2) And the core network function receives the multicast service data.
The device for switching multicast services provided in the embodiment of the present application can implement each process implemented in the method embodiment of fig. 2, and achieve the same technical effect, and is not described here again to avoid repetition.
Referring to fig. 6, an embodiment of the present invention provides an apparatus for switching a multicast service, where the apparatus 600 is applied to a source base station, and includes:
a fourth sending module 601, configured to send relevant information of a multicast service to a core network function, where the relevant information of the multicast service is used for the core network function to send multicast service data to a target base station.
Specifically, the information related to the multicast service may be a serial number related to the multicast service.
The device for switching multicast services provided in 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, and is not described here again to avoid repetition.
As shown in fig. 7, an embodiment of the present application further provides a communication device 700, which includes a processor 701, a memory 702, and a program or an instruction stored on the memory 702 and executable on the processor 701, for example, when the communication device 700 is a core network function, the program or the instruction is executed by the processor 701 to implement the processes of the method embodiment shown in fig. 2, and the same technical effect can be achieved. When the communication device 700 is a network-side device, the program or the instructions are executed by the processor 701 to implement the processes of the method embodiment shown in fig. 3, and the same technical effect can be achieved.
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. 2 or fig. 3, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.
Wherein, the processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and so on.
The embodiment of the present application further provides a chip, where the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is configured to run a network-side device program or an instruction, to implement each process of the method embodiment shown in fig. 2 or fig. 3, and can achieve the same technical effect, and details are not repeated here to avoid repetition.
It should be understood that the chips mentioned in the embodiments of the present application may also be referred to as a system-on-chip, a system-on-chip or a system-on-chip, etc.
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 a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatuses in the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions recited, e.g., the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present application.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (12)

1. A method for switching multicast service is applied to core network function, and is characterized in that the method comprises the following steps:
receiving related information of multicast service sent by a source base station;
determining the multicast service data which is already sent to the terminal by the source base station according to the relevant information of the multicast service, and/or determining the multicast service data which needs to be sent to the terminal by the target base station;
and sending the multicast service data to the target base station according to the multicast service data which is sent to the terminal by the source base station and/or the multicast service data which needs to be sent to the terminal by the target base station.
2. The method of claim 1, wherein the sending multicast traffic data to the target base station comprises:
acquiring the forwarding resource of the target base station;
and sending the multicast service data to the target base station through the forwarding resource according to the relevant information of the multicast service.
3. The method of claim 1, wherein before the sending the multicast traffic data to the target base station, the method further comprises:
and sending a forwarding indication of the multicast service data to the target base station, wherein the forwarding indication is used for indicating the target base station to reserve forwarding resources.
4. The method of claim 1, wherein after the sending the multicast traffic data to the target base station, the method further comprises:
and sending indication information to the target base station, wherein the indication information indicates that the multicast service data is sent to be finished.
5. The method of claim 1, wherein the multicast service data comprises one or more of the following:
multicast service data cached by the core network function;
and the core network function receives the multicast service data.
6. An apparatus for switching multicast service, applied to a core network function, includes:
the receiving module is used for receiving the relevant information of the multicast service sent by the source base station;
the first sending module is used for determining the multicast service data which is sent to the terminal by the source base station according to the relevant information of the multicast service and/or determining the multicast service data which needs to be sent to the terminal by the target base station; and sending the multicast service data to the target base station according to the multicast service data which is already sent to the terminal by the source base station and/or the multicast service data which needs to be sent to the terminal by the target base station.
7. The apparatus of claim 6, wherein the first sending module comprises:
an obtaining unit, configured to obtain a forwarding resource of the target base station;
a sending unit, configured to send the multicast service data to the target base station through the forwarding resource.
8. The apparatus of claim 6, further comprising:
a second sending module, configured to send a forwarding indication of the multicast service data to the target base station, where the forwarding indication is used to indicate that the target base station reserves forwarding resources.
9. The apparatus of claim 6, further comprising:
and a third sending module, configured to send indication information to the target base station, where the indication information indicates that the multicast service data is sent to the end.
10. The apparatus of claim 6, wherein the multicast service data comprises one or more of the following:
multicast service data cached by the core network function;
and the core network function receives the multicast service data.
11. An apparatus for switching multicast services, comprising a processor, a memory and a program or instructions stored on the memory and executable on the processor, the program or instructions when executed by the processor implementing the steps of the method for switching multicast services according to any one of claims 1 to 5.
12. 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 of switching multicast services according to any of claims 1 to 5.
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