Efficiency Study of TCP Protocols in Infrastructured Wireless Networks

Traditional TCP protocols treat all packet loss as a sign of congestion. Their inability to recognize non-congestion related packet loss has significant effects on the communication efficiency in the wireless networks. Recently proposed protocols such as Freeze-TCP, TCP-Probing, TCP Westwood/Westwood+, TCP Veno, TCP-Jersey, and JTCP, all imp rove over the traditional TCP protocols. This paper reports a quantitative comparison of recent protocols against the currently most often used namely, TCP SACK, TCP NewReno, and TCP Vegas. Simulation tests were designed for various network layouts and with differing external interferences in an attempt to most accurately simulate real-life scenarios.