The Tunable Parameter Based Deflection Routing Algorithm for OBS Networks
会议名称：《2005'第四届光互联网国际学术会议》
会议日期：2005年
学科分类：0810[工学-信息与通信工程] 08[工学] 081001[工学-通信与信息系统]
关 键 词：Optical Burst Switching (OBS) Contention Deflection Routing Deflection Probability QoS
摘 要：正The burst contention has a strong impact on the performance of optical burst switching （OBS） network, and currently, various contention resolution schemes have been proposed. Among them, the deflection routing is more attractive due to its looser requirement for optical buffer in capability and quantity. However, due to their unreasonable deflection controls, its conventional versions （i.e., directly drop, unconditional deflection, and limited deflection） possibly have less effect on resolving contentions when the traffic load increases. Therefore, this paper proposes the tunable-parameter deflection routing （TPDR） algorithm, which consists of the definition of a tunable-parameter （i.e., deflection probability） to control the deflecting of contending bursts, and the nonlinear programming to search the optimum deflection path in terms of the burst loss probability （BLP） and the path length. The simulation results show that it can improve the overall BLP and the BLP of each individual priority, and alleviate the offset-time deficit on QoS guarantee.