Utility-based interlayer coordination method in WDM (Wavelength Division Multiplexing) optical network

A coordination method and optical network technology, applied in the network field, can solve problems such as many limitations, achieve the effect of reducing fault recovery time and improving the utilization rate of protection resources

Active Publication Date: 2011-09-14
NORTHEASTERN UNIV
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Problems solved by technology

The traditional inter-layer coordination mechanism in WDM optical network has many l

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  • Utility-based interlayer coordination method in WDM (Wavelength Division Multiplexing) optical network
  • Utility-based interlayer coordination method in WDM (Wavelength Division Multiplexing) optical network
  • Utility-based interlayer coordination method in WDM (Wavelength Division Multiplexing) optical network

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Embodiment Construction

[0057] The utility-based inter-layer coordination method in the WDM optical network of the present invention will be further described in detail below with reference to the accompanying drawings.

[0058] 1. Optical network basic platform

[0059] 1 Overview of IP over WDM network and its key technologies

[0060] 1.1 WDM technology

[0061] 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.

[0062] 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 the natural environmen...

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Abstract

The invention provides a utility-based interlayer coordination method in a WDM (Wavelength Division Multiplexing) optical network, which comprises the following steps of: calculating the utilization rate of resources protected by a WDM layer; calculating the failure recovery utility of a light path of an IP (Internet Protocol) layer; and comparing the failure recovery utility of the WDM layer with the failure recovery utility of the IP layer. When the method is adopted, a failure recovery sequence of determining respective layers can be realized in case of a failure, and a utility-based interlayer coordination mechanism used for balancing the failure recovery time and the utilization rate of the protected resources is designed to be used for dynamically assessing and deciding the failure recovery in comprehensive consideration of the failure recovery time and the utilization rate of the protected resources; thus, the advantages of the recovery of the WDM layer and the recovery of the IP layer can be better utilized, the failure recovery time is reduced, and the utilization rate of the protected resources is increased.

Description

technical field [0001] The invention belongs to the field of network technology, and in particular relates to an utility-based interlayer coordination method in a WDM 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 the on WDM optical network. In order ...

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Application Information

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IPC IPC(8): H04Q11/00H04B10/08H04L12/24H04B10/03
Inventor 王兴伟王宇黄敏
Owner NORTHEASTERN UNIV
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