Ant-colony-system-based dynamic routing and wavelength assignment method for optical network

A technology of wavelength allocation and optical network, which is applied in multiplexing system selection devices, transmission systems, digital transmission systems, etc., can solve problems such as link congestion, failure to consider wavelength allocation and network balance, and reduce search the effect of time
CN102196325AInactive Publication Date: 2011-09-21NANJING UNIV OF POSTS & TELECOMM
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NANJING UNIV OF POSTS & TELECOMM
Publication Date
2011-09-21
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an ant-colony-system-based dynamic routing and wavelength assignment method for an optical network. In the method, an ant colony system is introduced into the dynamic routing and wavelength assignment of the optical network, the problems of wavelength assignment and network equalization are fully taken into account, and vacancy rates of links are introduced into the transition probability of an ant colony algorithm as constraint conditions to avoid overmany services selecting the same link, thereby effectively reducing the average blocking rate of the whole optical network; and non-intelligent ants are further introduced to meet the requirement of the routing and the wavelength assignment on real-time performance and prevent searching from being convergent in a locally optimal path too early.
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Description

technical field

[0001] The invention relates to an optical network dynamic routing wavelength allocation method, in particular to an ant colony system-based optical network dynamic routing wavelength allocation method, which belongs to the field of optical communication and optimization algorithms. Background technique

[0002] The optical network is composed of network nodes and multi-wavelength optical fiber links connecting nodes, and multiple different wavelengths carrying services are transmitted in the same optical fiber. When the client layer business arrives, the optical network needs to calculate the route and allocate the wavelength for each business, and establish an optical channel to transmit the business. Therefore, the routing and wavelength allocation (RWA) problem is one of the most critical technologies in the optical network.

[0003] The core of the RWA problem is how to calculate and select a route from the service source node to the destination node acc...

Claims

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