PROJECT TITLE :

TCP Performance over Wi-Fi: Joint Impact of Buffer and Channel Losses

ABSTRACT:

We tend to propose an analytical model for a Wi-Fi network acting as a final-mile Internet access with multiple long-lived TCP connections on both the up and down links. Our model considers the joint impact of buffer losses at the access purpose, contention at the medium access management layer, and packet losses due to the wireless channel being erroneous. We tend to show that the model accurately quantifies the likelihood of an arbitrary TCP packet being discarded, and the full throughput obtained on the up and down links. Furthermore, quantitative insights can be gained into the throughput that long-lived TCP flows achieve below the joint impact of all aforementioned types of losses. In specific, we notice that the wireless channel errors and buffer overflows both cause throughput unfairness, however that they do so in the opposite direction on the up and down links, respectively. We demonstrate that this insight will be exploited therefore on considerably mitigate the throughput unfairness while not compromising the overall obtainable network throughput.