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Method for realizing group broadcast channel quick switching

An implementation method and fast switching technology, which is applied in the field of network communication, can solve the problems that the user terminal cannot continue to watch the program, the program data is lost, and the program is blurred, so as to achieve the effect of operability

Active Publication Date: 2006-01-04
HUAWEI TECH CO LTD
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AI Technical Summary

Problems solved by technology

[0023] Since step (2) is faster than step (1), the data flow of two channels will briefly appear on the line, with a total bandwidth of 8M, exceeding the 5M bandwidth of the line, so that the program data will be lost, resulting in TV Or the program viewed by the PC has a blurred screen
[0024] If there is no query in the above step (1), and the port is directly deleted from the multicast group, then for the situation that multiple user terminals in the user network are ordering the same program, it will only be given to one The port retains a multicast replication entry, and the entry is deleted, so that other user terminals under the same port cannot continue to watch the program

Method used

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  • Method for realizing group broadcast channel quick switching
  • Method for realizing group broadcast channel quick switching
  • Method for realizing group broadcast channel quick switching

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Embodiment Construction

[0066] The core idea of ​​the present invention is that when the multicast client (ie, the user terminal under the port) sends a request to leave the multicast group, the access device will use the location information (such as the access port information) of the user terminal to access Judging whether the user terminal is the last user under the corresponding location information, if so, directly deleting the entry corresponding to the location information from the multicast replication table, otherwise, retaining the entry. The invention ensures that any user terminal can quickly leave a certain multicast group and conveniently transfer to another multicast group, so that the user terminal can quickly select and switch between different program channels.

[0067] The technical solution provided by the present invention only focuses on the interaction between the access device and the user's home network when multicasting video, and the network networking structure involved is...

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Abstract

This invention relates to a quick switch realization method for multicast channels including: when a user terminal leaves the current placed multicast channel, it is judged if said position information in said multicast channel has other accessed user terminals based on the position information accessed by said user terminal and the multicast duplicate list of the related channel is maintained according to the judgment result, which realizes that there is always only one multicast flow bandwidth on a user terminal circuit and solves the problem of existing multicast flows on the circuit during the switch.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a method for realizing fast switching of multicast channels. Background technique [0002] The multicast video network that carries out the multicast service on the current data network generally adopts such as figure 1 The networking model shown. The multicast video network includes Headend System (video head-end system), IP metropolitan area network (including Core device, central device), access network (including Edge device, edge device) and Home Network (home network) four component. [0003] The video head-end system implements video user management, CA / DRM (conditional access / digital rights management), and video encoding functions, and then sends video service streams to the IP MAN. Each video program and broadcast channel is encoded into a code stream by MPEG-2 (MPEG, Moving Picture Experts Group) and encapsulated into a UDP / IP (User Datagram Protocol / I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/54H04L12/28H04L12/18
Inventor 吴海军
Owner HUAWEI TECH CO LTD
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