TY - JOUR
T1 - Optimum Number of RLC Retransmissions for Best TCP Performance in UTRAN
AU - De Mey, Olivier
AU - Schumacher, Laurent
AU - Dubois, Xavier
PY - 2005
Y1 - 2005
N2 - As far as transfer reliability is concerned, the wireless segment of UTRAN is the weakest part of an Internet session. To overcome this imperfection, the RLC protocol features a link-level retransmission mechanism. In this paper, we show by analytical means and computer simulations that for a given Block Error Rate (BLER), the maximum number of RLC transmissions has a very important impact on TCP performance, both Round Trip Time and throughput. We extend existing models to be able to set a maximum number of RLC transmissions, and we determine the corresponding throughput analytically. We also show that, knowing the current BLER, a network operator may tune the maximum number of retransmissions either to reduce the RTT or to increase the throughput.
AB - As far as transfer reliability is concerned, the wireless segment of UTRAN is the weakest part of an Internet session. To overcome this imperfection, the RLC protocol features a link-level retransmission mechanism. In this paper, we show by analytical means and computer simulations that for a given Block Error Rate (BLER), the maximum number of RLC transmissions has a very important impact on TCP performance, both Round Trip Time and throughput. We extend existing models to be able to set a maximum number of RLC transmissions, and we determine the corresponding throughput analytically. We also show that, knowing the current BLER, a network operator may tune the maximum number of retransmissions either to reduce the RTT or to increase the throughput.
M3 - Literature review
JO - Proceedings of the 16th Annual IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC), Berlin (Germany), 11-14 September 2005
JF - Proceedings of the 16th Annual IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC), Berlin (Germany), 11-14 September 2005
ER -