Abstract

ODMRP (On-Demand Multicast Routing Protocol) [6] [8] [2] is a popular multicast protocol for wireless ad hoc networks. The strengths of ODMRP are simplicity, high packet delivery ratio, and non-dependency on a specific unicast protocol. ODMRP floods a route request over the entire network to select a set of forwarding nodes for packet delivery. However, a single forwarding path is vulnerable to node failures, which are common due to the dynamic nature of mobile ad hoc networks. Furthermore, a set of misbehaving or malicious nodes can create network partitions and mount Denial-of-Service (DoS) attacks. This thesis proposes a ODMRP-based wireless multicast protocol named RODMRP that offers more reliable forwarding paths in face of node and network failures. A subset of the nodes that are not on forwarding paths rebroadcast received packets to nodes in their neighborhoods to overcome perceived node failures. This rebroadcasting creates redundant forwarding paths to circumvent failed areas in the network. Each node makes this forwarding decision probabilistically. Our simulation results indicate that RODMRP improves packet delivery ratio with minimal overheads, while retaining the original strengths of ODMRP.

Library of Congress Subject Headings

Multicasting (Computer networks); Routers (Computer networks); Wireless LANs; Packet switching (Data transmission)

Publication Date

2007

Document Type

Thesis

Department, Program, or Center

Computer Science (GCCIS)

Advisor

Kwon, James

Advisor/Committee Member

Cao, Matt

Advisor/Committee Member

Bischof, Hans-Peter

Comments

Note: imported from RIT’s Digital Media Library running on DSpace to RIT Scholar Works. Physical copy available through RIT's The Wallace Library at: TK5105.887 .P37 2007

Campus

RIT – Main Campus

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