Receiver based capacity enhancement with cross-layer design approach for IEEE 802.11 ad-hoc networks
Satish Ket, Raval N. Awale · 2011
The performance of IEEE 802.11 with different network densities and protocol configurations is of interest, particularly in distributed coordination function (DCF) mode. A mathematical model for one hop network IEEE 802.11 protocol was introduced by Bianchi [2] to analytically derive the saturated throughput. Our ultimate goal is to enhance the capacity of Ad-hoc network closer to the analytical values of this model. As an attempt, we propose the Receiver Based Capacity Enhancement Algorithm using Cross-Layer Design Approach (RCECLD) by dynamically adapting the data rate. It uses Signal-to-Noise Ratio (SNR) values calculated by Physical layer and exported to Medium Access Control (MAC) layer via the cross-layer interface to estimate the prevailing channel state. In RCECLD the receiver decides the transmission data rate by calculating the SNR value of received RTS (Ready-to-Send), which is in turn an estimate of the prevailing channel state, and piggybacking it through CTS (Clear-to-Send) to the transmitter. Accordingly transmitter transmits the data frame with adopted data rate.