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Routing and spectrum allocation method and system based on sharing protection

A shared protection and spectrum allocation technology, applied in the field of communication, can solve the problems of connection request transmission data loss, multi-time, etc.

Active Publication Date: 2017-08-08
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method needs to release other services occupying the same spectrum resources, and then switch the faulty connection request on the working path to the shared protection path. Compared with the dedicated protection method, the switching process of the shared protection method takes more time, which may Cause connection request transfer data loss

Method used

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  • Routing and spectrum allocation method and system based on sharing protection
  • Routing and spectrum allocation method and system based on sharing protection
  • Routing and spectrum allocation method and system based on sharing protection

Examples

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specific example

[0111] According to the optimal solution obtained by the objective function, the obtained results are evaluated and analyzed to ensure that the spectrum resource occupancy of a given set of known connection requests is minimized, and the shared protection routing and spectrum allocation based on joint failure probability constraints are completed.

specific Embodiment

[0112] In order to achieve the goal of minimizing the spectrum resources occupied by a group of connection requests, first initialize the spectrum flexible optical network G(V, E, F), including network topology information, network switching nodes, and spectrum resources of optical fiber links; secondly , to generate a set of connection requests, including the source node, destination node, and bandwidth requirements of the connection request; finally, the optimization objective function based on the routing and spectrum allocation method of shared protection, the bandwidth flow conservation of the connection request that satisfies the optimization objective function, The constraints of shared spectrum resources, spectrum continuity, unique spectrum slot occupancy, and disjoint links between working paths and protection paths are used to obtain optimal solutions for spectrum resource occupancy. Specific examples are as follows:

[0113] First, image 3 Represents a spectrum f...

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Abstract

The invention relates to a routing and spectrum allocation method and system based on sharing protection for guaranteeing the survivability of connection requests and improving the utilization rate of spectrum resources of an optical network with a flexible spectrum. The routing and spectrum allocation method based on sharing protection provided by the invention comprises the following steps: initializing the optical network with the flexible spectrum; generating a group of connection requests; setting an optimal target function of the connection requests for the purpose of guaranteeing the minimum occupation of spectrum resources of working paths and sharing protection paths selected by the connection requests; and running the optimal target function, obtaining an optimal solution of the target function through set constraint conditions satisfying the optimal target function, and storing and recording the obtained optimal solution of the target function. By adoption of the routing and spectrum allocation method and system based on sharing protection provided by the invention, the routing and spectrum allocation problem based on sharing protection in the optical network with the flexible spectrum is solved, the efficiency of the spectrum resources of the optical network with the flexible spectrum is improved, and the survivability of the connection requests is guaranteed.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and system for routing and spectrum allocation based on shared protection in a spectrum flexible optical network. Background technique [0002] In a spectrum flexible optical network, in order to ensure network survivability, a dedicated protection method or a shared protection method is usually used to protect connection requests. [0003] (1) For the dedicated protection method, it establishes a working path and a link-disjoint protection path, and allocates spectrum resources on the selected working path and protection path. In particular, each spectrum slot on the protection path can only be occupied by one connection request, and cannot be occupied by multiple connection requests at the same time. The advantage of this method is that when the working path of the connection request fails, the connection request can be quickly switched to the protection path, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/911H04Q11/00H04L12/707H04L12/721H04L45/24
CPCH04L45/14H04L45/22H04L47/82H04Q11/0062H04Q2011/0086
Inventor 陈伯文
Owner SUZHOU UNIV
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