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Method and network system for synchronously recovering multimedia broadcast multicast service

A technology for multimedia broadcasting and multicasting services, applied in the field of synchronous recovery of multimedia broadcasting and multicasting services, methods and network systems, capable of solving problems such as inability to recover synchronously correctly, avoiding long-term loss of synchronization, and improving robustness and efficiency Effect

Inactive Publication Date: 2011-04-27
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0041] The technical problem to be solved by the present invention is to provide a method and a network system for synchronous recovery of multimedia broadcast and multicast services, which are used to solve the problem in the prior art that cannot be correctly synchronously recovered after packet loss occurs

Method used

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  • Method and network system for synchronously recovering multimedia broadcast multicast service
  • Method and network system for synchronously recovering multimedia broadcast multicast service
  • Method and network system for synchronously recovering multimedia broadcast multicast service

Examples

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Effect test

Embodiment 1

[0119] During the processing of the SYNC protocol, the lower-layer network element where the service data packet is lost detects that the service data packet with the sequence number of the synchronization sequence X is N, N+1, and N+2 is lost, then:

[0120] The lower-layer network element where the service data packet loss occurs sends a first control plane message to its adjacent lower-layer network element, and the first control plane message carries: service identification information, timestamp information of the synchronization sequence, and The serial number information of the lost data packet, the specific indication method of the serial number information can have the following several ways:

[0121] ● A set of sequence number information, for example, the first control plane message carries three sequence numbers, N, N+1, and N+2, to indicate lost data packets.

[0122] ● The start and end sequence number information of the lost service data packet, in this example,...

Embodiment 2

[0138] During the processing of the SYNC protocol, the lower-layer network element where the service data packet is lost detects that the control frame of the SYNC protocol of a certain synchronization sequence (corresponding to the frame of type 0 in the SYNC protocol, the control frame carrying the total length of the synchronization sequence and total number of data packets), at this time, the lower-level network element where the service data packet loss occurs cannot know the total number of data packets and the data length of the synchronization sequence, and cannot know whether there is a Data packet loss, for example, the lower-layer network element where the service data packet loss occurs does not receive the SYNC control frame of the synchronization sequence X, and the sequence number of the last data packet of the synchronization sequence X it receives is N. The sequence number of the last packet of the synchronization sequence is M then:

[0139] The lower-layer n...

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Abstract

The invention discloses a method and a network system for synchronously recovering a multimedia broadcast multicast service (MBMS), which are used for solving the problem that correct synchronous recovery cannot be performed after packets are lost in the prior art. The method comprises the following steps that: a lower-layer network element of which a service packet is lost sends a request message for acquiring the information of the lost service packet to adjacent lower-layer network elements; the adjacent lower-layer network elements feed back the information of the lost service packet to the lower-layer network element of which the service packet is lost; and further, the lower-layer network element of which the service packet is lost performs synchronous recovery according to the acquired information of the lost service packet. By the method, the lower-layer network element of which the packet is lost continuously is synchronously recovered by synchronous information acquired from one or a plurality of adjacent lower-layer network elements in a group of network elements for realizing MBMS synchronous transmission to prevent the lower-layer network element from desynchronizing for a long time, so the robustness and efficiency of MBMS service synchronization are improved greatly.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method and a network system for synchronous recovery of multimedia broadcast and multicast services. Background technique [0002] In order to effectively utilize mobile network resources, 3GPP (3rd Generation Partnership Project, 3rd Generation Partnership Project) proposed a multimedia broadcast multicast service MBMS (Multimedia Broadcast Multicast Service). The technology of target data transmission realizes the sharing of network (including core network and access network) resources and improves the utilization rate of network resources (especially air interface resources). The MBMS defined by 3GPP can not only realize plain text and low-rate message multicast and broadcast, but also realize broadcast and multicast of high-speed multimedia services, and provide a variety of rich video, audio and multimedia services, which undoubtedly conforms to the requirem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/06H04W56/00
Inventor 艾建勋翟恒星张遥马兵
Owner ZTE CORP
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