Enhanced Multipath Optimized Link State Routing Protocol for MANETs

Mobile Adhoc Networks (MANETs) are dynamic and self-organized temporary networks which include a set of mobile routers and hosts sharing same radio channel using wireless connections exchanging data without a centralized management. Due to limited transmission range of wireless Adhoc network nodes, multiple hops are usually needed for a node to exchange information with any other node in the network. Thus routing is a crucial issue to the design of a MANET. Optimized Link State Routing Protocol (OLSR) is a table driven proactive routing protocol, with topology information and routes. Its efficiency depends on multipoint relay selection. Various studies were undertaken to decrease control traffic overheads by modifying present OLSR routing protocol. A novel routing protocol for Adhoc networks named as SR-MPOLSR develops from OLSR, incorporating multi-path strategy and source routing controlling scheme. It raises the throughput and drops the average delay. The proposed multipath OLSR for MANETs is based on link quality. It is compared with OLSR and SR-MPOLSR. This new algorithm calculates link quality based multiple routes. Source data transmission is through multiple paths. The experiment includes 50 nodes distributed over a 3 square kilometre area.