Limiting Route Request Flooding Using Velocity Constraint in Multipath Routing Protocol

Mobile ad hoc network (MANET) diverges from the conventional wireless Internet infrastructure. MANETs are deployed in an environment which has no preexisting infrastructure along with the irregular movement of nodes. Because of the inconsistent movement of nodes, routes break frequently and the reestablishment of routes utilizes more network resources and energy. So, it is essential to provide a routing protocol which handles the mobility of nodes and helps in reducing packet drops. Ad Hoc On-Demand Multipath Distance Vector (AOMDV) is a preexisting routing protocol for MANET whose performance may degrade due to high velocity of mobile nodes. Furthermore, the AOMDV protocol incorporates excessive flooding of RREQ packets at the time of route discovery phase. So to deal with these issues, we are introducing a new routing protocol named Velocity Constrained Multipath Routing Protocol (VC-AOMDV). And it also results in better QoS performance simultaneously. The only routes that are velocity constrained and having better link reliability will get chosen for information transmission. The simulation results prove that the proposed protocol VC-AOMDV will perform better with delay, PDF, packet loss, etc., as compared to AOMDV protocol. It will also reduce the packet drop and delay with the increment of successfully delivered packets.