A novel distributed signaling scheme for lightpath setup time optimization in dynamic wavelength routed optical networks

作者：Lu, LH^*; Zeng, QJ; Liu, JM

来源：Conference on Network Architectures, Management and Applications II, China,Beijing, 2004-11-09 to 2004-11-11.

DOI：10.1117/12.573572

• lightpath establishment
• switching fabric configuration
• setup time optimization
• distributed signaling protocols
• wavelength routing networks

One of the challenges to dynamically set up a lightpath is to develop efficient control schemes in control as well as the management of the distributed-controlled optical networks. In networks with highly dynamic traffic loads, longer lightpath setup time may result in higher blocking probability and serious degradation of the network performance. In this paper, we propose a novel distributed signaling protocol designated as signaling with switching fabric status (SWFS). In this scheme, we consider the switch fabric configuration performing distributed signaling as well as routing and wavelength assignment. We forward the signaling request messages with available wavelength sets as well as the extra switching status for each wavelength at each node in the paths between the source-destination (S-D) pairs. The extra switching status indicates if the switch fabric should be reconfigured to provide internal port connection for specified wavelength at the node. When the signaling message reaches the destination, a wavelength with minimal reconfiguration times in the available wavelength set will be selected to shorten the connection establishment time. A distributed discrete event simulation platform has been developed to evaluate the performance of SWFS. The simulation results show that our proposed technology has the shorter setup time and lower blocking probability than the traditional non-optimization signaling technology.

• 出版日期2005
• 单位上海交通大学