Improving TCP performance over wireless network - split connection approach

Abstract

The objectives of this research find out a solution to improve TCP performance in wireless network. Improving TCP performance in wireless environment that allows wireless devices work better on the network infrastructure available in the wired network and use applications and services effectively that have been developed in wired network. There have been several approaches to improve TCP for data transmission over wireless networks. They are divided into four basic methods: • Link layer solution: Instead of using retransmit mechanism be end-to-end, link- layer solution just only transfers data at link layer. When transferring data over wireless link that happen packet looses frequently, this way be transfer data over many stages which decrease error on transmission link when transferring data over long distance. • Split connection: The main idea of this mechanism is splitting each TCP connection between sender and receiver into two separate parts via base station. This mechanism is the same as link layer mechanism, but the difference is that it happens in TCP layer. • Explicit Notification: TCP thinks that looses packet because of congestion network. Many mechanisms is developed which FH (fixed host) can recognize the real reason of packet looses. Main ideal be send explicit notification for sender. • End-to-end: This approach must not find out support solution. Instead, this way improving flow control mechanism of TCP. In addition to, TCP also add features to adapt with causes of packet looses.

This research will concentrate on split connection to improve TCP performance with a detailed focus on Indirect TCP (I-TCP) and Mobile TCP (M-TCP). In addition to compare approaches together with other, help capture the overall problems that TCP in wireless be also contracted the same time, and research knowledge about wireless networks in particular and data transmission in general.