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Method, system and device for guaranteeing reliable transmission of multicast service

A technology of multicast services and guaranteed groups, applied in the field of communications, can solve the problems of long time to restore multicast services, inability to meet video services, and low bandwidth utilization.

Active Publication Date: 2010-04-21
苏州贡湖精密制造产业发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] The above-mentioned method of using ASON for multicast transmission, when the network fails, the multicast service can only be restored by rerouting, usually the multicast service cannot be restored within 50ms, resulting in a delay in multicast service transmission, which cannot meet the needs of video services. needs
[0020] In the process of realizing the present invention, the inventor found that the existing unidirectional multicast service has a contradiction between the coordinated bandwidth utilization rate and the protection switching time requirement, resulting in low bandwidth utilization rate or long time to restore the multicast service

Method used

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  • Method, system and device for guaranteeing reliable transmission of multicast service
  • Method, system and device for guaranteeing reliable transmission of multicast service
  • Method, system and device for guaranteeing reliable transmission of multicast service

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Embodiment 1

[0065] see figure 2 In this embodiment, the main path and the backup path are established by the same multicast source as an example. The method for ensuring the reliable transmission of multicast services specifically includes the following steps:

[0066] Step 101: Allocate a multicast group identifier and a service identifier for a multicast source.

[0067] The multicast group identifier is an identifier shared by the paths from the multicast source to all the multicast sink nodes on the multicast group; the service identifier is used to identify the multicast service from the multicast source to the same multicast sink node.

[0068] Step 102: Calculate the main path from the multicast source to the multicast sink node, and then calculate the backup path separated from the main path.

[0069] When establishing a path, spread topology and TE information through OSPF (Open Shortest Path First)-TE (Traffic Engineering, traffic engineering), and use CSPF (Constraint-based S...

Embodiment 2

[0085] This embodiment takes two multicast sources as an example. These two multicast sources are respectively the main multicast source and the backup multicast source. Agreements are automatically generated. see Image 6 , the method for ensuring reliable transmission of multicast services specifically includes the following steps:

[0086] Step 201: assigning the same multicast group identifier to the primary multicast source and the backup multicast source respectively.

[0087] The multicast group identifier is an identifier shared by the paths from two multicast sources to all multicast sink nodes in the multicast group. When transmitting multicast services, resource sharing can be performed on overlapping links between two multicast sources and multicast sink nodes according to the multicast group ID, that is, the same multicast group is transmitted on the overlapping links of these paths The same time slot can be used for multicast services.

[0088] Step 202: The ...

Embodiment 3

[0105] see Figure 8 , an embodiment of the present invention provides a system for ensuring reliable transmission of multicast services, including:

[0106] The multicast source device 301 is used to calculate the main path and the backup path separated from the main path, and establish the main path and the backup path in a resource-sharing manner within the scope of the multicast group, and send multicast services on the main path and the backup path ;

[0107] The multicast terminal device 302 is configured to selectively receive the multicast service sent by the multicast source device 301 on the main path and the backup path.

[0108] Wherein, the multicast source device 301 also includes:

[0109] A service identifier assignment module, configured to assign a service identifier to the main path and the backup path;

[0110] Correspondingly, the multicast terminal device 302 includes:

[0111] The multicast service judging module is used to judge whether the multicas...

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Abstract

The invention discloses a method, a system and equipment for ensuring the reliable transmission of multicast services, pertaining to the communication field. The method includes: calculate a main pathand calculate a backup path which is separated from the main path; construct the main path and the backup patch in a resource sharing way in the scope of the multicast group; deliver multicast services on the main path and the backup path. The system comprises multicast source equipment and multicast terminal equipment. The multicast source equipment comprises a main path calculating module, a backup path calculating module, a path constructing module and a multicast service delivering module. The invention also provides multicast service transferring equipment, which comprises a multicast group judging module, a resource sharing module and a service transferring module. The invention constructs the backup path separated from the main path, and shares the resources on the overlap link within the scope of the multicast group, ensuring the switching time as well as enhancing the usage rate of bandwidth.

Description

technical field [0001] The invention relates to the communication field, in particular to a method, system and equipment for ensuring reliable transmission of multicast services. Background technique [0002] The application of unidirectional multicast services in the field of video services is becoming more and more extensive. During the transmission of video signals, the following requirements are required: [0003] 1) The business is a one-way business; [0004] 2) The protection switching time is short, and the switching time is generally required to be within 50ms; [0005] 3) Bandwidth utilization should be as high as possible; [0006] 4) There are protective measures for the failure of the program source; [0007] 5) Click on the end-to-end configuration capability; [0008] 6) Reliable transmission, so that there is no way to communicate. [0009] The broadcast TV service is a typical one-way multicast service. Generally, there are one or more program sources. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/18H04L12/54H04L45/16H04L45/24
Inventor 石兴华王光军
Owner 苏州贡湖精密制造产业发展有限公司
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