An efficient and dynamic backoff algorithm for IEEE 802.11 networks

Abstract

Listen

Translate article

Performance of Wireless LAN can be improved at each layer of the protocol stack with respect to energy efficiency. The Media Access Control layer is responsible for the key functions like access control and flow control. During contention, Backoff algorithm is used to gain access to the medium with minimum probability of collision. After studying different variations of backoff algorithms, a new variant called History based Probabilistic Backoff Algorithm is proposed. Mathematical analysis and simulation results using NS-2 with parameters like retransmission counts, saturated throughput, transmission delay, different data sizes and different traffic patterns was carried out. It is seen that proposed History based Probabilistic Backoff algorithm outperforms the other backoff algorithms.