Multiconstraint and multicast routing method in WDM (Wavelength Division Multiplexing) optical network
A multi-constraint, optical network technology, applied in the network field, can solve the narrow application range, not well adapted to WDM optical network application scenarios, and does not consider the sparse part of the wavelength conversion constraint, the number of optical transceivers and the sparse part of the light splitting constraints, etc. problems, to achieve the effect of a wide range of applications
Active Publication Date: 2011-07-27
NORTHEASTERN UNIV
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[0003] Currently, multicast routing in WDM optical networks mostly considers a single constraint, which has a narrow scope of application, and does not consider the constraints of sparse wavelength conversion, the number of optical transceivers, and sparse light splitting, etc., which cannot be well adapted to WDM optical networks. Practical Application Scenarios of the Network
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[0055] A multi-constraint multicast routing method in a WDM optical network of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0056] 1. Optical network basic platform
[0057] 1Overview of IP over WDM network and its key technologies
[0058] 1.1 WDM technology
[0059] 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.
[0060] 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 environment, and ...
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The invention provides a multiconstraint and multicast routing method in a WDM (Wavelength Division Multiplexing) optical network, belonging to the technical field of network communication. The method comprises the following steps of: initiating and calculating the minimum cost path from a source node to a destination node; adding a path; calculating the minimum cost path from an MC (Multi-Carrier) wavelength node to the destination node; adding an optical tree; and releasing optical tree resources created in a multicast forest. The multiconstraint and multicast routing method in the WDM optical network solves the multicast routing problem in the WDM optical network, is used for constructing the optical tree and performing the service routing in consideration of user request constraint, sparse part wavelength conversion constraint, constraint of the number of optical transceivers, sparse part light splitting constraint and the like, has broader application range and better reflects anactual application scene in the WDM optical network.
Description
technical field [0001] The invention belongs to the field of network technology, and in particular relates to a multi-constraint multicast routing 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. [0003] Curr...
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Inventor 王兴伟王宇黄敏
Owner NORTHEASTERN UNIV