A review of protocols related to enhancement of TCP performance in wireless and WLAN networks

Proposition assumed by the TCP protocol that any packet loss is due to network congestion, is no longer suitable for wireless networks, because TCP poorly fulfills its role in such networks. In this article has been presented and been listed the main causes of this performance degradation. Even though there are many methods and protocols have been proposed TCP variants up until now, in this review only a few of them have been studied. Here as solutions to the reasons of TCP performance degradation in wireless and wireless LAN networks were grouped into three main groups: end-to-end approaches, split-connection approaches and proxy-based approaches. Research in this area is still producing rapid action, and considerable amount of problems are still widely open, so this article is to identify the main causes of TCP performance degradation over wireless networks and to review some proposed TCP variant to prevent such lack of TCP in wireless and WLAN networks.