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Comprehensive Performance Analysis of a TCP Session Over a Wireless Fading Link with

Summary: 1
Comprehensive Performance Analysis of a
TCP Session Over a Wireless Fading Link with
Alhussein A. Abouzeid, Sumit Roy & Murat Azizoglu
A link model-driven approach towards TCP performance over a wireless link is presented. TCP packet loss behavior is
derived from an underlying two-state continuous time Markov model. The approach presented here is (to our knowledge)
the first that simultaneously considers (i) variability of the round-trip delay due to buffer queuing, (ii) independent and non-
independent (bursty) link errors, (iii) TCP packet loss due to both buffer overflow and channel errors, and (iv) the two modes
of TCP packet loss detection (duplicate ACKs and timeouts). The analytical results are validated against simulations using
the ns-2 simulator for a wide range of parameters; slow and fast fading links; small and large link bandwidth-delay products.
For channels with memory, an empirical rule is presented for categorizing the impact of channel dynamics (fading rate) on
TCP performance.
Transport Control Protocol, Wireless Communications, Performance Analysis.
TCP is currently the most widely used transport protocol in packet networks [1] such as the Internet and is
largely responsible for end-to-end congestion control. It achieves its congestion control objectives by slowly
increasing the rate at which a source releases packets (i.e. the transmission rate) into the network while reacting to


Source: Abouzeid, Alhussein A. - Department of Electrical, Computer and Systems Engineering, Rensselaer Polytechnic Institute


Collections: Engineering; Computer Technologies and Information Sciences