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Preset network protection method capable of sharing bandwidth

A technology for network protection and bandwidth sharing, applied in data exchange networks, digital transmission systems, electrical components, etc., can solve problems such as complex signaling and inability to achieve protection and recovery, and achieve the effect of simplifying network operations

Inactive Publication Date: 2007-02-28
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

However, the shared path protection method requires complex signaling during fault recovery, and when a fault occurs, the switches of the intermediate nodes need to be configured in real time, so it cannot achieve protection recovery as fast as a ring network

Method used

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  • Preset network protection method capable of sharing bandwidth
  • Preset network protection method capable of sharing bandwidth

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Embodiment Construction

[0019] In order to better understand the technical solutions of the present invention, the implementation manners will be described in detail below in conjunction with the accompanying drawings and examples.

[0020] Fig. 1 is an example of the network topology adopted by the present invention, and there are 25 nodes in Fig. 1, numbered from 0 to 24. Assume that all network nodes have wavelength conversion capability, and each link has a pair of unidirectional optical fibers with opposite directions, and each optical fiber has 16 wavelengths. Each wavelength request in the network arrives at the network according to an independent Poisson distribution, and the average arrival rate is λ. The hold time of each connection follows a negative exponential distribution, and the average hold time of a connection is 1 / μ=1 unit time. Without loss of generality, it is assumed that all time units are "seconds", that is, 1 / μ=1s. The load of the network can be expressed by ρ=λ / μ, because 1...

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Abstract

The invention relates to a preformed network protective method which can share bandwidth. Wherein, it comprises: first using traditional shortest path algorism to build one working path to each new service; then projecting present all preformed protective paths to the logic chain between source-host nodes; then based on the jump number of each protective path, the preformed bandwidth, and the bandwidth of new service request, fixing the cost of each logic chain, then using traditional shortest path algorism to build one shortest protective path for new service. When the network is accident, the fail service can be switched to preformed protective path, to quickly protect and return. The invention has the return-protect speed as 1+1 special protective method, while its network resource utilization rate reaches share path protective method.

Description

technical field [0001] The invention relates to a network protection method, in particular to a preset network protection method capable of sharing bandwidth. Used in the field of network communication technology. Background technique [0002] With the continuous development of the Internet and network technology, higher and higher requirements are put forward for the survivability of the network, the utilization rate of resources, and the scalability of the network. Many protection and recovery strategies have been proposed based on the ring topology and mesh topology of the network. Fast protection recovery (about 50ms) can be achieved in a ring network (such as BLSR), but at least 100% of backup resources need to be reserved. In a mesh network, using the 1+1 dedicated protection method can achieve a fast protection recovery of less than 50ms, but the reserved backup resources are at least more than 100%. [0003] After searching the literature of the prior art, it was ...

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Application Information

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IPC IPC(8): H04L12/24H04B1/74H04L1/22
Inventor 许田曹庄琪沈启舜祝国龙朱琨
Owner SHANGHAI JIAO TONG UNIV
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