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A computing method for route of automatic switching optical network multicast service

A multicast service and automatic switching technology, which is applied in the direction of data exchange network, multiplexing system selection device, digital transmission system, etc., can solve the problem that the multicast service cannot be restored, and achieve saving network bandwidth and recovery success rate High, 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

Method used

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  • A computing method for route of automatic switching optical network multicast service
  • A computing method for route of automatic switching optical network multicast service
  • A computing method for route of automatic switching optical network multicast service

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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 proposes a calculation method for automatically switched optical network multicasting service routing, which comprises the steps that: a root node calculates and establishes an optical multicasting tree and sets the multicasting service attribute and the multicasting ID, and carries out the setting of the recovery strategy of the branch node and informs the branch node of the information of the leaf node below the branch node; various network elements in the network real-timely detect that the node and / or the link malfunctions; the node network element detecting the link failure and / or the downstream node failure searches the multicasting service connection on the ineffective link and / or bear between the ineffective network elements; by combining the set recovery strategy, the branch node calculates the multicasting routing with the failure node and / or the upstream branch node network element of the link serving as the source and the downstream node or leaf node serving as the lunar station; the branch node begins to restore the signaling process of establishing the routing, sets the new service connection to be the same with the original service connection attribute and the multicasting ID and informs the multicasting root node of updating the multicasting routing information.

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): H04L12/24H04Q11/00H04L12/56H04L45/16
Inventor 司昕
Owner ZTE CORP
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