Special unicast multi-layer protective method based on load equalization in optical network

A load balancing, multi-layer protection technology applied in the network field

Inactive Publication Date: 2011-09-14
NORTHEASTERN UNIV
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  • Abstract
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The protection method of the present inventi

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  • Special unicast multi-layer protective method based on load equalization in optical network
  • Special unicast multi-layer protective method based on load equalization in optical network
  • Special unicast multi-layer protective method based on load equalization in optical network

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Embodiment Construction

[0104] The unicast-specific multi-layer protection method based on load balancing in the optical network of the present invention will be further described in detail below with reference to the accompanying drawings.

[0105] 1. Optical network basic platform

[0106] 1 Overview of IP over WDM network and its key technologies

[0107] 1.1 WDM technology

[0108] The continuous high-speed growth of mobile services, 3G emerging services are ready to launch, and the vigorous development of Internet services such as distance education, video conferencing, video-on-demand, and e-commerce have led to explosive growth in data communication services. The explosive growth of business demands puts forward new requirements for the capacity, function and performance of the communication system.

[0109] The easiest way to increase the bandwidth of a communication system is to lay more optical fibers, but laying optical fibers is expensive, and is limited by physical conditions such as t...

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Abstract

The invention provides a special unicast multi-layer protective method based on load equalization in an optical network, belonging to the technical field of network communication. The method comprises the steps of establishing working LSP (Logical Signal Processor) for service request, establishing a protective LSP for service request, providing WDM (Wavelength Division Multiplex) layer protection for a heavy working load optical path, and releasing resources after the service is not used. In the invention, the application scope of the traditional special unicast multi-layer protective method can be extended; a plurality of constrain situations are considered when carrying out multi-layer protection; the recovering action and utilization ratio of the resource can be considered comprehensively, and due to the load equalization used for wavelength on a physical link and the load equalization used for bandwidth on the optical path, the quantity of the services affected when the physical links fail can be reduced as far as possible.

Description

technical field [0001] The invention belongs to the field of network technology, and in particular relates to a load balancing-based unicast dedicated multi-layer protection method in an optical network. Background technique [0002] With the rapid development of the Internet, people put forward new requirements for the capacity and performance of the communication system. A wavelength division multiplexing (Wavelength Division Multiplexing, WDM) technology can provide a huge transmission capacity to meet the bandwidth requirements of Internet services. However, once a network failure occurs, it will cause a large number of business interruptions. At the same time, in order to reduce network operating costs and improve bandwidth resource utilization, the transmission network is gradually developing from the traditional IP over ATM over SDH / SONET over WDM multi-layer structure to the IP over WDM two-layer structure, and IP services are directly carried on WDM on the optical...

Claims

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Application Information

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IPC IPC(8): H04Q11/00H04L12/56H04L12/803
Inventor 王兴伟王宇黄敏
Owner NORTHEASTERN UNIV
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