The Study Of Channel Schedule Algorithm In OBS (Optical Burst Switching) Network

Optical Burst Switching (OBS) combines the benefits of Optical Circuit Switching (OCS) and Optical Packet Switching (OPS) while avoiding the limitations of OCS and OPS. The channel-using rate of OBS is higher than OCS, and the possibility of realization is more than OPS. It can satisfy the explosive increase of data in the future, and satisfy the need of multiplicity and levity of network. So the technology of OBS is considered as the most potential technology in optical switching.The key technology of OBS network combine: the channel schedule algorithm, the assembly algorithm in edge node, resource reservation protocol, the method of resource confliction, and the quality of service. This thesis introduces the structure and some key technology of OBS network.This thesis mainly studies the channel schedule algorithm. Firstly, it studies the two constantly used algorithms: LAUC algorithm and LAUC-VF algorithm, and gives the flow chart and description of algorithms by C language, while comparing the performance of the two algorithms by simulating tool MATLAB. The thesis points out the bug of LAUC algorithm, and proposes the new channel algorithm: LAUC-aSV(Latest Available Unscheduled Channel with Smallest Void based on coefficient-a ). The algorithm of LAUC only considers the least waste of channel, but doesn't consider the reasonable using of FDL. The LAUC-aSV algorithm in this paper consider both using of channel and FDL as the index of OBS network, because the importance of them are different, the coefficient-a is present to balance, the thesis gives the flow chart and description of algorithm by C language, the simulations of two algorithms are carried out by simulation tool MATLAB. The result of simulation...