Throughput enhancement of the prioritized flow in self aware MANET based on neighborhood node distances

Abstract

Mobility causes frequent link failures in ad hoc network resulting in packet losses. Another cause of packet loss is collision which MANET misinterprets as link failure and triggers route maintenance phase. Triggering of this unnecessary route maintenance phase adds extra overhead to the network resulting in low throughput. In this paper a Quality of Service (QoS) aware cross layer model PrioritizedQoS (PrQoS) is proposed to improve the throughput of the prioritized flow in Self Aware MANET. According to the distance of the receiving node from the transmitting node, which is found using Received Signal Strength, packets are treated differently in lower layers by dynamically adjusting the Request To Send (RTS) retry limit based on the priority of the flow. The simulation is done in ns-2 and the PrQoS is compared with the traditional methods i.e. default behavior of the protocols. The results show that the prioritized flow achieves higher throughput than the unprioritized flow when compared to traditional method. Further the PrQoS also avoids unnecessary route re-discovery attempts by finding the root cause of the packet drop based on the distance between the nodes thereby reducing the network load. � 2011 IEEE.