Some Mechanisms to Improve TCP/IP Performance over wireless and Mobile Computing Environment

Authors:
Wen-Tsuen Chen;Jyh-Shin Lee
Affiliations:
-;-
Venue:
ICPADS '00 Proceedings of the Seventh International Conference on Parallel and Distributed Systems
Year:
2000

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Abstract

The Internet and wireless networks are two of the most important technical developments that have had a direct effect on the lives of people over the past few years. The next step is to combine these two technologies to provide wide-area wireless Internet access. Currently Transport Control Protocol/Internet Protocol (TCP/IP) is the most important protocol integrates a wide range of different physical networks into a global Internet. The environment of wireless networks violates many assumptions made by traditional TCP/IP. Compared with fixed and wired networks, the wireless networks have high bit-error rate (BER) and offer less available bandwidth. Furthermore, the host mobility also results in packet loss or delay during handoff procedures. Hence, the performance of TCP/IP over such wireless networks without any modification would suffer significant degradation of throughput and high interactive delay. In this paper, we propose some schemes to improve the performance of TCP/IP over wireless networks according to their characteristics. In this paper, we analyze the performance of TCP/IP under different network conditions by using ns-2 simulator to facilitate comparisons with previous studies. The simulation results show that our proposed mechanisms achieve better performance than other protocols.