A recovery method for multicast tree in multicast service of automatic switching optical network

A technology for automatic switching and multicast services, applied in the direction of data switching networks, digital transmission systems, electrical components, etc., can solve problems such as the inability to restore multicast services, and achieve network bandwidth saving, high recovery success rate, and fast recovery time Effect

Inactive Publication Date: 2008-06-04
ZTE CORP
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Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a recovery method for automatically switching optical network multicast service connections, avoiding the problem of establishing another group due to insufficient network resources. The problem that the multicast service cannot be restored due to the multicast tree, so that the network resources can be effectively used and the survivability of the multicast service can be improved

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  • A recovery method for multicast tree in multicast service of automatic switching optical network
  • A recovery method for multicast tree in multicast service of automatic switching optical network
  • A recovery method for multicast tree in multicast service of automatic switching optical network

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Embodiment 2

[0051] Step 210 and step 220 in embodiment two are the same as the first two steps in embodiment one, and their application examples are also the same, the difference lies in the operation after step 230;

[0052] Step 230, the node network element that detects the link failure and / or the failure of the downstream node searches for the service connection carried on the failed link and / or with the failed network element, if it includes a multicast service connection, perform step 240, otherwise, According to the protection and recovery strategy, transfer to the source node of the relevant business for protection or recovery processing, and end;

[0053] In the corresponding example, the LRM of NE B detects a fiber failure in the direction of the local B-F link. The LRM of NE B searches for service connections carried on the B-F link, and finds that the B-F link carries the corresponding multicast ID and service attributes of the multicast service connection.

[0054] Step 240,...

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Abstract

The invention discloses a recovery method of automatically switched optical network multicast service and multicast tree, which comprises root node calculation and optical multicast tree establishment, multicast service property and multicast ID setting, branch node recovery strategy setting and information on leaf node under branch node informing. Each network element in the network detects fault that occurs on the nodes and link circuits and searches for the multicast service connection beard between invalid link circuits and / or invalid network elements. The branch node, combines with the set recovery strategy, originates from each fault node and / or the upstream branch node network element of the link circuits and lodges to the downstream or leaf node to calculate a plurality of multicast routes; or the branch node originates from all fault nodes and / or the upstream branch node network elements of the link circuits and lodges to the downstream or leaf node to, establish multicast tree. The branch node recovers new multicast tree establishment and sets the properties of new service connection and original service connection, which are the same as the multicast ID.

Description

technical field [0001] The invention belongs to the technical field of survivability in the automatic switching optical network ASON, in particular to the optical multicast service in the ASON network. Background technique [0002] Automatically switched optical network ASON is defined by ITU-T SG15 group, and it is a hot spot in network research and implementation at present. Compared with the traditional optical network, ASON increases the control plane, strengthens the management and control of the network, can dynamically and automatically complete the establishment, removal and modification of the end-to-end optical channel, and when the network fails , can dynamically assign the best recovery route according to network topology information, available resource information, configuration information, etc., and its essence lies in on-demand dynamic bandwidth assignment, intelligent connection management, and fast and effective survivability strategies. [0003] With the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/24H04L12/26H04B10/20H04Q3/52H04L45/16
Inventor 司昕
Owner ZTE CORP
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