Multi-hop AODV-2T

Communication in ad hoc wireless network may generally be uncertain because the established route could be broken anytime. The major cause of link failures in ad hoc wireless network is the dynamic movement of the mobile nodes themselves and the other might be battery running out.AODV-2T is an improved AODV designed to compromise this problems by applying a conservative and circumspect concept. By investigating received RF signal and the battery power, AODV-2T could overcome the problem by preparing a backup route just-in-time before link breaking. This makes it able to switch packet transmission to the backup route without any delay with a bit of additive overhead.Although AODV-2T performs rather well compared to the early proposed protocols in term of overhead and number of route break but AODV-2T is not capable to construct a multi-hop backup route. On the assumption that Multi-hop backup route establishment might be more flexible and gives more chance of success in Ad hoc route maintenance,so we have extended AODV-2T to support multi-hop backup route. The improved protocol called Multi-hop AODV-2T was implemented into a NS-2 model. We simulated Multi-hop AODV-2T function and compared its route maintenance mechanism´s performance with AODV and AODV-2T. The results have shown that Multi-hop AODV can reduce number of route break and packet loss obviously.