Towards Enhancing Reliability in Hybrid Mobile Ad-Hoc Network

Abstract

Mobile Ad‐Hoc network (MANET) is a group of multi‐hop mobile nodes that communicate with each other without any centralized control infrastructure or fixed infrastructure. Nodes in MANET communicate with each other using wireless channels. Because the nodes have short transmission range in MANET, therefore multiple hops communication may be look for transmitting packets across the network. In order to make easy communication within the network,the routing protocol is use to find out paths between source node to the destination node. The main goal in MANET is routing for efficient and correct path establishment between couple of nodes, so that data delivery may be in timely manner. In our thesis, we present a hybrid routing protocol named as Dynamic routing protocol (DRP), which uses relay node when destination node is not in Line Of Sight (LOS). Our proposed protocol enforces LOS communication between the nodes. Typically we deal with an environment where we have all of these nodes, which have a very fast, intermediate and slow mobility. In hybrid networks nodes are either in LOS or Non Line Of Sight (NLOS). Fading and shadowing effect the communication more in NLOS as compared to LOS, and also reduces the reliability of communication. In DRP, an intermediate or relay node is used for communication where both source and destination are not in direct LOS. This relay based communication will increase the reliability of communication with dynamic mobility in an urban environment. We have evaluated DRP in Manhattan grid mobility model with heavy traffic loads, experiments reveal that, DRP significantly reduces packet drop ratio and gives better throughput as compared to Dynamic Source Routing Protocol (DSR) and Ad Hoc On‐ Demand Distance Vector routing protocol (AODV). Furthermore DRP improves number of packet delivered in fewer time.