Transmission Control Protocol (TCP) is the most commonly used transport protocol on the Internet. All indications assure that mobile computers and their wireless communication links will be an integral part of the future internetworks. This paper presents how regular TCP is well tuned to react to packet loss in wired networks. Then it defines mobility and the problems associated with it. The paper discusses why regular TCP is not suitable for mobile hosts and their wireless links by providing simulation results that demonstrate the effect of the high bit error rates of the wireless link on TCP performance. The problems caused by the mobility of hosts using a graph tracing packets between fixed and mobile hosts is discuss and illustrate.
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