Wang Zhiwen,Xia Qin,Li Zengzhi,Li Pingjun
(School of Electronics and Information Engineering,Xi'an Jiaotong University,Xi'an 710049,China)
Abstract：An optimization model, whose objective is minimizing the totak cost of capacity accommodated on every fiber link in optical transport networks, is constructed on the basis of theory of multi-commodity flow and operating principle of survivability schemes. Representation of model is analyzed for different survivability schemes and the optimal effect for protection capacity requirements caused by stub release is investigated in path protection. The results obtained by tabu-search algorithm shows that fault-oriented path protection needs more protection capacity than link protection needs. It also reveals that selection of protection route and distribution of traffic demand have some effects on protection capacity requirements and complexity of algorithm.
Keywords：wavelength division multiplexing;network survivability;protection capacityrequirements;stub release