Performance Evaluation of Location Aided Routing in MANET

A mobile ad hoc network is a wireless network that uses multi hop peer to peer routing. A user can move any time at any place, as a result that network need to have routing protocol which can hold dynamically changing topology. To accomplish this, a number of ad hoc routing protocol have been proposed and implemented such as DSR, LAR, WRP. The comparatively study will be done on basis of increase in number of nodes with CBR values. Three simulation result are described using two CBR values these are 10 and 50. In these results LAR perform best as comparison of DSR and WRP because the LAR protocol uses location information to reduce the search space for a desired route limiting the search space-results in fewer route discovery messages. This paper compares the major characteristics of these protocols such as throughput, collision, loss packet percentage using a parallel discrete event-driven simulator, Glomosim-2.03. In light traffic load, throughput and collision of DSR protocol is best as compare to LAR and WRP but in heavy traffic LAR is best because in heavy traffic LAR use Global Positioning System to find the exact location of node in network. So that overhead has to be reduced.