Scalable Overlay Multicasting in Mobile Ad Hoc Networks (SOM
Journal Title: International Journal on Computer Science and Engineering - Year 2010, Vol 2, Issue 7
Abstract
Many crucial applications of MANETs like the battlefield, onference and disaster recovery defines the needs for group communications either one-to-many or many-to-many form. Multicast plays an important role in bandwidth scarce multihop mobile ad hoc networks comprise of limited battery power mobile nodes. Multicast protocols in MANETs generate many controls overhead for maintenance of multicast routing structures due to frequent changes of network topology. Bigger multicast tables for the maintenance of network structures results in inefficient consumption of bandwidth of wireless links and battery power of anemic mobile nodes, which in turn, pose the scalability problems as the network size is scaled up. However, many MANET applications demands scalability from time to time. Multicasting for MANETs, therefore, needs to reduce the state maintenance. As a remedy to these hortcomings, this paper proposes an overlay multicast protocol on application layer. In the proposed protocol titled “Scalable Overlay Multicasting in Mobile Ad Hoc Networks (SOM)” the network nodes construct overlay hierarchical framework to reduce the protocols states and constrain their distribution within limited scope. Based on zone around each node, it constructs a virtual structure at application layer mapped with the physical topology at network layer, thus formed two levels of hierarchy. The concept of two level hierarchies reduces the protocol state maintenance and hence supports the vertical scalability. Protocol depends on the ocation information btained using a distributed location ervice, which effectively reduces the overhead for route searching and updating the source based multicast tree.
Authors and Affiliations
Pariza Kamboj , A. K. Sharma
Keywords
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