Study on Distributed Restorable Lightpath Establishment Mechanism in Automatically Switched Optical Network
Zhao Ji-jun①②; Ji Yue-feng①;Xu Da-xiong①
①Optical Comm. Center of Beijing Univ. of Posts and Telecomm., Beijing 100876, China;②Hebei Institute of Architectural Science and Tech., Handan 056038, China
Abstract：To obtain efficient survivability, this paper presents a novel restorable lightpath selection algorithm based on the automatically switched optical network frame. A numerical simulation is made in term of this routing selection algorithm. The result shows that the traffic has an obvious balancing trend; the block probability of connection requests has been reduced. At the same time, this algorithm has an excellent performance on bandwidth utility and sharing of the restoration resources. This paper also discusses the mesh network service lightpath and restoration lightpath setting up strategy. In the automatically switched optical network frame, a parallel restorable lightpath setup mechanism is proposed based on the Generalized Multi-Protocol Label Switching (GMPLS)principle.
2004, Vol. 26 
