QoS-Aware Routing and Admission Control for MANETs

electronics and communication engineering

Providing quality of service (QoS) assurances in a mobile ad hoc network (MANET) is difficult due to node mobility, contention for channel access, a lack of centralized co-ordination, and the unreliable nature of the wireless channel. A QoS-aware routing (QAR) protocol and an admission control (AC) protocol are two of the most important components of a system attempting to provide QoS when the above mentioned difficulties are faced. Many QAR and AC-based solutions have been proposed, but such network layer solutions are often designed and studied with idealized lower layer models in mind. This means that existing solutions are not designed for dealing with practical phenomena such as the link quality-dependent fluctuation of link transmission rates and shadow fading i.e., the phenomenon that occurs when a mobile node moves behind an obstruction and experiences a significant reduction in signal power. In this project two Protocols Ad Hoc On Demand Vector Routing (AODV)and a multirate aware version of Staggered Admission Control (StAC) which works along with the QAR, AC protocols are being proposed .The AODV provides loop free routes ,ie. Each mobile host operates as a specialized router and the routes are obtained when needed. The StAC co-operates with the QAR to cope up with the shadow fading environment. Here packet delay, throughput, packet data ratio and the packets received are used to analyze the performance of the proposed protocols.

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