Research On P-Cycle Protection Of Multicast Sessions In WDM Optical Network

Recently, along with the rapid growth of various Internet applications such as interactive multimedia and cloud computering, the demand of optical network which supporting high bandwidth work has been incerasing urgently. Furthermore, the multicasting in WDM network has been popular recently to satisfy the rapid growing requirements of many new bandwidth-driven and time sensitive applications which can distribute messages from the same source to various group members simultaneous, a single optical fiber cut may also causes severe service interruptions and vital data missing. Thus the robust recovery strategy for WDM network supporting multicasting has been a key issue. This paper focus on the research of multicast surviability in WDM network and p-cycle protection method.This paper introduce mulicast in WDM network firstly, analysis and discuss of its protection. Aim at the poor resource utilization shortcomings of the representative scheme about p-cycle protection for multicast sessions, this paper presents an improved IpC mechanism named EIpC including both the segment IpC and the path Ip C algorithm simultaneously.Theoretical analysis and simulation results show that the path IpC has the best performance in resource utilization and the number of p-cycle(s), than the segment Ip C and the classical(link) Ip C.However link IpC has a higher average AE than the segment IpC and the path Ip C.This paper also presents an improved IpC mechanism named PIpC. The main feature of PIpC is setting priority when multicast sessions arrival. Theoretical analysis and simulation results show that the PIpC has the better performance in resorce utilization and average blocking rate.