This paper has outlined a method (called OBGP) of extending BGP to support lightpath setup and management across an optical network. The development of OBGP has been discussed by reviewing current BGP behavior and design requirements for OBGP. An implementation of OBGP using simulation tools has been presented, along with initial test results, which have shown that a seamless migration from BGP to OBGP is possible.
Abstract-Wavelength routed all-optical networks require that continuous wavelengths be established from source to destination nodes if no wavelength converters exist in the network. The requests to establish these lightpaths can be blocked, depending on the availability of the wavelengths. It has been discovered that lightpaths of longer length suffer higher blocking probability than those of shorter lightpaths, which is known as the Fairness Problem. The Traffic Classification and Service (ClaServ) Method is introduced to optimize the Fairness Problem as well as reduce the traffic blocking probability. Simulation results for a 4x4 Mesh-Torus network and a NSFNET topology show that the ClaServ method can greatly reduce the blocking probability for average network traffic requests.
All-Optical Networks require end-to-end lightpaths to be established for traffic to flow, given that there are no wavelength converters present in the network. It is shown that as the lightpaths traverse more hops, the blocking probability increases. This is causes the Fairness Problem. We introduce the Traffic Classification and Service Method (ClaServ), which optimizes the Fairness Problem, as well as reduce the traffic blocking probability when the networks require lower blocking probability. The combination of the Waveband Access Range (WAR) and the Waveband Reservation (WRsv) methods changes the traffic's distribution among the wavebands on each link of the path to control the degree of the interference among the classified traffic. Under certain traffic load, by setting the range of accessible wavebands and reserved wavebands for classified traffic, the network can achieve both the fairness and low blocking probability for all type of traffic. The simulation results show that for a 4x4 Mesh-Torus network the ClaServ method can greatly reduce the blocking probability for longer lightpaths by a factor of 100. It is also described how the ClaServ method can easily be implemented into a distri buted signaling protocol.
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