Performance Analysis of TCP over Wired-Wireless
Networks with Go-back-N ARQ Protocol
上石 唯貴 (9951201)
Transmission Control Protocol (TCP) which plays an important role as
the reliable transport protocol, are tuned to perform well
over wired networks where packet losses occur mostly because of
congestion. On the other hand, over wired-wireless networks,
TCP suffers from significant throughput degradation
because of random loss resulting from
the quality variations of the wireless channel due to
fading, shadowing, noise, and so on.
Therefore it has been suggested that an appropriate
link-layer automatic repeat request (ARQ) protocol is efficient
for improving TCP performance over wired-wireless networks.
In this study, we analyze the performance of TCP over wired-wireless networks
with Go-back-N ARQ protocol. We consider
a discrete-time single-server queueing system with finite buffer
and derive the TCP throughput using
the empirical knowledge of bandwidth-delay product.
Numerical results show how the TCP throughput is affected
by the quality variation of the wireless channel and
the window size of Go-back-N ARQ.