A SELF ADAPTIVE BASED CONTENTION WINDOW FOR ADVANCED INFRARED CSMA/CA MAC PROTOCOL FOR WIRELESS LANS

摘要

Advanced Infrared (AIr) is a suggested framework for Infrared Data Association (IrDA) for interior infrared LANs. Advanced Infrared (AIr) is the standard MAC prototype for wireless infrared LANs and is capable to assist point to multiple point transaction although it is not precisely constructed for such prototypes. A back off approach is a methodology for the wireless system MAC layer protocol to resolve a collision whenever the network is shared with two or more nodes. Since for small networks, the throughput of the existing model degrades and propagation, transmission delay increases due to large contention window size with the augmented number of empty CAS that resulting in a significantly lower consumption than optimal. This paper provided a flexible and self-adaptive contention window back off methodology that greatly enhances the throughput by adjusting the optimum CW updating aspect rendering to the hypothetical study. This approach efficiently diminishes the number of collisions and enhances the network consumption. In AIr MAC CSMA/CA protocol, the simulation result showed that the novel back off approach efficiency is much improved compared to the existing Linear Adjusting CW back off approach.