Method for protecting and restoring service comprising inevitable nodes
A technology that must go through nodes and recovery methods. It is applied in electromagnetic wave transmission systems, digital transmission systems, electrical components, etc. It can solve the problem that the optical network does not have enough time to recalculate the protection route, so as to shorten the route recovery time and ensure the route calculation. Efficiency, the effect of improving the success rate
Active Publication Date: 2014-01-01
STATE GRID CORP OF CHINA +4
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[0004] When a single node in a link or path fails, all its adjacent links will be broken at the same time, so that the optical network does not have enough time to recalculate the protection route after multiple link failures
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[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.
[0039] The present invention provides a method for service protection and restoration including necessary nodes. The ant agent periodically generated by the ant colony algorithm collects the node state information from the source node to the destination node in the network, thereby updating the node state transition probability table; in this embodiment The node state transition probability table and node topology diagram of Figure 4 , 5 shown; node i has K i neighbor nodes, the state transition probability table of node i is where the state transition probability table has N-1 rows, K i column, N is the number of states that the node jumps, n is the neighbor node, d is the destination node, is the state transition probability of jumping from neighbor node n to destin...
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The invention provides a method for protecting and restoring a service comprising inevitable nodes. An ant agent generated through an ant colony algorithm regularly is used for collecting the node state information from a source node to a destination node in a network, and therefore a node state transition probability table is updated. The method comprises the specific steps that first, an inevitable node sequence is established; second, segmented routes between the source node and the inevitable nodes and between the destination node and the inevitable node are acquired, and the segmented routes are integrated; third, breakdown nodes are detected; fourth, restored routes are obtained. Compared with the prior art, the method for protecting and restoring the service comprising the inevitable nodes can shorten restoring time and quickly obtain the restored routes when the service needs to meet the specific condition that certain inevitable nodes are passed through, and therefore the success rate of service restoring is improved.
Description
technical field [0001] The invention relates to a service protection and recovery method, in particular to a service protection and recovery method including necessary nodes. Background technique [0002] The optical network is a wide area network, a metropolitan area network or a newly built large-scale local area network that uses optical fiber as the main transmission medium. In the optical network, the user dynamically initiates a service request, and the network element automatically calculates and selects the path, and realizes the establishment, restoration, removal, fusion, switching, and transmission of the network connection through signaling control; the protection and restoration of the optical network has always been the key to the survivability of the optical network. important link. When the optical network fails, although the protection recovery method does not need to reserve resources in advance, it still needs to dynamically search and integrate idle netw...
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IPC IPC(8): H04L12/24H04B10/032
Inventor 刘君妍丁慧霞刘革马辰张杰卢利锋赵永利滕玲宋曦李跃华
Owner STATE GRID CORP OF CHINA