On demand temporary route recovery for frequent link failures in adhoc networks

摘要

Adhoc network is a collection of wireless mobile nodes dynamically forming a temporary network without the use of existing network infrastructure or centralized administration. Each node acts as a router by itself and forwards all the packets which it receives. There is a frequent link failure in adhoc Networks, which causes packet to be lost or packets doubt to reach destination. In this scenario a different mechanism and a scheme is proposed and implemented to make the important time critical data like real time or voice data to reach the destination without any loss. The mechanism used is a special propagation which propagates a unique kind of route discovery for real time application scenario to send the time critical data safely. The scheme used is temporary path between the nodes during link failure. The important node then forwards the buffered packets to the destination without any loss which is on-demand based on type of information a node forwards. Special buffer is allocated for the nodes marked important during special propagation. The significant nodes are assumed and simulated by using a simulation tool GloMoSim. This extensive model is compared with standard models performance metrics such as throughput, retransmission and end-to-end delay are analysed.