Cost Efficient Fault Tolerant Design in Mesh Optical Networks with the Load Aware Method |
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Authors: | Ruyan Wang Dapeng Wu Sheng Huang Keping Long |
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Affiliation: | (1) Special Research Centre for Optical Internet and Wireless Information Networks, School of Information and Communication Engineering, Chongqing University of Posts and Telecommunications, Chongqing, 400065, People’s Republic of China;(2) School of Computer and Communication Engineering, University of Science and Technology Beijing, Beijing, 100083, People’s Republic of China |
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Abstract: | With increasing wavelength capacity, the fault tolerant policy of the mesh optical network becomes much more important. To
meet the survivability requirement, a set of cost efficient fault tolerant mechanisms are designed in this paper. The main
objective is the minimization of the total number of required wavelengths. Furthermore, based on the method of the Integer
Linear Program (ILP), shared-path protection and shared-link protection strategies are achieved, respectively. Moreover, the
objective of minimizing the load imbalance is used to ensure the network resources utilized efficiently, and then the wavelength
contention can be mitigated by selecting the working path and backup path reasonably. The results show that the survivability
of the optical network can be guaranteed in a cost efficient manner. |
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