Reliable Communication over Wireless Links
Abstract
Within the PCC Wireless IP project, we study how to optimize TCP/IP connections over fading wireless links. An important aspect here is to evaluate transport protocols for reliable (error-free) end-to end communication. The dominating transport protocol on the Internet is TCP/IP. This protocol has been tuned since 1977 for the primary problem in a global network, congestion and high but static latencies. The Internet is changing to utilize more wireless network segments. Wireless networks introduce new problems such as stochastic packet loss and varying latencies, which create problems for existing TCP flow control algorithms. In this paper, we describe and compare schemes designed to improve the performance of TCP in such networks and propose our own solution for the problem. INTRODUCTION The Transmission Control Protocol (TCP) defines a key service provided by the Internet, namely, reliable stream delivery. TCP provides a full duplex connection between two machines, allowing them t...
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