WDM방송망에서 새로운 멀티캐스트 스케줄링 알고리즘의 설계 및 성능평가

Design and Performance Analysis of New Multicast Scheduling Algorithm in WDM Broadcast Networks

In this paper, new multicast scheduling algorithms are proposed for the WDM single-hop broadcast-and-select networks. The existing multicast scheduling algorithms are focused on the partitioning a multicast group into several subgroups to reduce the delay time of each receivers. These partitioning algorithms are grouping method of the receivers already tuned to the transmitters wavelength. However, these algorithms ignore the state of receivers, which leads to increase the number of subgroups and the delay time. Therefore, we propose two new multicast scheduling algorithms called H_EAR and PGM that partition a multicast group to subgroups using the tunable transmitter, state information of receivers, and pseudo group concept. The performance of proposed algorithms are evaluated through the computer simulation. They show the better performance comparing with the existing multicast algorithms.