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Summary: ESTIMATING PACKET ARRIVAL TIMES IN BURSTY VIDEO APPLICATIONS
Ali C. Begen and Yucel Altunbasak
School of Electrical and Computer Engineering
Georgia Institute of Technology, Atlanta, GA USA
{acbegen, yucel}@ece.gatech.edu
ABSTRACT
In retransmission-based error-control methods, the most funda-
mental yet the paramount problem is to determine how long the
sender (or the receiver) should wait before deciding that an un-
acknowledged (or a missing) packet is lost. This waiting time is
generally referred to as retransmission timeout (RTO). An accu-
rate RTO estimation has two main advantages: First, the lost pack-
ets can be identified earlier, and hence, can be recovered faster.
Second, redundant retransmissions can be avoided, which subse-
quently not only saves the network resources, but also helps ex-
isting network congestion alleviate sooner. Although it is statis-
tically possible to prevent any unnecessary retransmission at the
expense of long error-recovery times, such an approach can only
be justified for data applications; it is not well-suited for delay-
sensitive applications, for which the agility in recovering the lost
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