Enhancement and simulation of the IEEE 802.11 RTS/CTS scheme under noisy channel

The electromagnetic noise in large cities is inevitable, it causes high delays and worsens the throughput due to data distortion. To reduce the impact of noise on the performances of IEEE 802.11 networks, we propose an enhancement of the IEEE 802.11 RTS/CTS scheme to recognize the reason of a transmission failure (collision or noise errors), thus the data packet is immediately retransmitted with zero-waiting time if a failure happens due to distortion by noise. This retransmission continues until the data packet is successfully transmitted or dropped when the number of packet transmission retries attains its limit. The proposed performance evaluation and comparison have been done under our own network simulator tool. So, we have analyzed the overall throughput of the IEEE 802.11 network.