Reliable Communication over Wireless Links.
Nordic Radio Symposium 2001 (NRS 01) ,
Nynäshamn, Sweden, April 3-5 2001.
The Wireless IP project within the PCC program studies
problems that are crucial in the evolution of UMTS towards high
data rates, as well as in future 4G technologies aimed at
rapidly mobile terminals. The goal is to attain higher
througputs for packet data in particular in downlinks,
without bandwidth expansion and while providing acceptable
quality of service for various classes of traffic.
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
The dominating transport protocol on the Internet is
TCP/IP. This protocol has been tuned since 1977 for the primary
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
In this paper, we describe and compare schemes
improve the performance of TCP in such networks and propose our
own solution for the problem.
on Hybrid type-II ARQ/AMS and scheduling using channel
prediction on fading channels.
Wireless IP System Proposal, RVK02
The simulation environment, RVK02.
Poster in Pdf, 11.5Mbyte