Improved QoS in Ad-Hoc On-Demand Routing Protocol For MANETS

Mobile ad-hoc Networks (MANETS) is a collection of wireless nodes without any infrastructure support. Quality of service (QoS) provisioning in MANETs is very important in order to support real-time communications such as audio and video. But, provisioning of QoS over wireless networks is far more challenging than for wired networks because of variability of wireless links, node mobility, and lack of central coordination authority for QoS. Ad-hoc on demand distance Vector (AODV) algorithm is a quick and efficient routing protocol designed for MANETS. The major drawback of AODV is the shortage of the quality of service (QoS) provisions. This paper proposes modifications to AODV protocol to improve the quality of service by combining three different routing approaches namely adaptive hello messaging, traffic aware route discovery and local link failure recovery. The modified protocol provides better QoS than the conventional AODV protocol.