Flow Aware Admission Control-Multipath protocol with multiple constraints (FAAC-MM) for assurance of multiple QoS metrics in MANETs

The emergence of MANET supported applications and the subsequent widespread acceptance is facilitated by the development and availability of cheap wireless Wi-Fi devices. Its anticipated role as an integral part of future communication environment accounts for why support for QoS should be an essential requirement rather than an additional feature. Provisioning of QoS to MANET-based applications will not be possible without Admission Control and QoS-aware routing protocols. It is on this premise that Flow-Aware Admission Control (FAAC) protocol is designed to improve the throughput and delay assurance of MANET-based applications. Real time applications require multiple guaranteed QoS metrics like throughput, delay, jitter etc. The work presented in this paper is an extension of our designed FAAC protocol to improve the provisioning of multiple QoS metrics in many mobile scenarios. The source node is designed to maintain more than a single path to each destination with the reliability of the routes maintained through nodes disjointness. Each route must fulfil the throughput and delay requirement of the application. The designed FAAC-Multipath protocol with multiple constraints (FAAC-MM) is equipped with the intermediate route repair mechanism to enable the intermediate node to carry out route repair locally without contacting the source node. With an effective QoS violation detection and route maintenance mechanism, the protocol reduces the frequency of route discovery thus leading to a significant reduction in QoS disruption. We have illustrated the effectiveness of FAAC-MM with the state of the art admission control protocols. Simulation results show the effectiveness of the FAAC-MM protocol in terms of high throughput, low delay, low packet loss and session dropping ratio.