RELIABLE MULTICASTING IN MOBILE AD-HOC NETWORKS BY LINK EXPIRATION TIME

V.Sumathy, P.Narayanasamy,
1Research scholar, ECE Department, Government College of technology,
Coimbatore-641013, Tamil Nadu, India
2CSE Department, Anna university, Chennai-600025, Tamil Nadu, India,
 

Abstract

Reliable multicasting is an enhanced protocol of the existing ODMRP (On Demand Multicast Routing Protocol). Existing ODMRP follows the fixed route refresh time. Each node in reliable multicasting includes its direction and velocity along with its current position in the join query and forward it to the next node. Based upon the neighbor nodes direction, velocity and current position each node will predict the LET (Link Expiration Time) i.e., how long the two nodes will remain connected. Every node overwrites the direction field, velocity field, and current position field in the join query and relay it to the next node. This procedure is repeated by each forwarding node and the lowest LET value is included in the join query. The minimum most LET of the path that reaches the receiver is considered as the RET (Route Expiration Time). This RET is included in the join reply and forwarded to the source. The source node will select the maximum RET from the join replies and use this as the refreshing interval for the selected path. In our Reliable multicasting, the packet delivery ratio is increased to 45% and the control packet transmission is reduced to 28% compared to conventional ODMRP.

 Keywords: ODMRP, Link Expiration time, Route Expiration time, Refresh interval, reliable multicasting

Biographies:

P. Narayanasamy, acquired his B.E degree in Electrical and Electronics Engineering from Coimbatore Institute of Technology, Coimbatore in the year 1980. He obtained his Master’s degree in Computer Science and Engineering in the year 1982 from Anna University, Chennai and his PhD in the year 1990 from Anna University, Chennai. He is at present professor and Head of the Department of Computer Science and Engineering, Anna University, Chennai. He has wide area of interests and his Research interest focuses on Wireless Communication, and Computer Networks. He has published more than ten papers both in the International and National journals and presented more than twenty one papers both in the International, and National conferences. His presentation also includes IEEE conferences. He holds additional charge as the coordinator for both Information Security Education and Awareness Project sponsored by Ministry of Communication and Information Technology, India and Value added services in Regional Language on Hand Held Devices sponsored by Tamil Virtual University.

V. SUMATHY ,acquired B.E degree in Electronics and Communication Engineering from Government College of Technology (GCT), Coimbatore, in the year1988. She obtained her Master’s degree in Computer Science and Engineering from Government College of Technology, Coimbatore, in the year 2000.At present she is a Senior Lecturer in the Department of ECE, GCT, Coimbatore. She has published nine papers in both National/International Conferences and two papers in journals in the area of Ad-Hoc Networks.

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