• Karishma Agrawal
• Prakash Mishra

In this paper, we propose an enhanced MPR selection algorithm of OLSR protocol that conserve the benefits of the original algorithm and add other parameters to select MPR nodes by using local databases of neighbor nodes extended to three hops. These improvements reduce the number of TC packets. The new proposed algorithm uses a simple modification in OLSR protocol without additional overheads. That is, we designed and implemented an initial routing protocol IOLSR that extends the well-studied OLSR protocol. IOLSR is designed for mobile multicast routers, and works in a heterogeneous network composed of simple unicast OLSR routers, IOLSR routers and hosts. Wireless Internet Group Management Protocol (WIGMP) offers the possibility for OLSR nodes (without multicast capabilities) to join multicast groups and receive multicast data. IOLSR protocol takes benefit of the topology knowledge gathered by the OLSR protocol with its topology control messages exchange to build multicast trees. It works even when not all nodes are multicast capable. A multicast tree is built and maintained for any tuple (source, multicast group) in a distributed manner without any central entity and provides shortest routes from the source to the multicast group members. The multicast trees are updated whenever a topology change is detected. Simulation Results Shows that IOLSR protocol shows 26.35% improved results than OLSR protocol in terms of PDR. It also shows improved results for Throughput and Residual Energy but it has 8.76% high Delay as compared to OLSR protocol. The algorithm preserves capacity and connectivity of network, decreases latency and also provides significant energy conservation.

MANET, Topology Control , OLSR and IOLSR Routing Protocols, NS-2.35.

"An Implementation of Routing Protocol for Topology Control in MANET", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.423-430, June-2019, Available :http://www.jetir.org/papers/JETIR1907T31.pdf

"An Implementation of Routing Protocol for Topology Control in MANET", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp423-430, June-2019, Available at : http://www.jetir.org/papers/JETIR1907T31.pdf