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Optimum Number of RLC Retransmissions for Best TCP Performance in UTRAN

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tcp - ip

Overview 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. This paper shows 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 (RTT) and throughput. The paper extends the link level Automatic Repeat Request model proposed by Peisa et al. (2001) to be able to set a maximum number of RLC transmissions, and with the help of Padhye's TCP throughput model (2000), it determines the corresponding throughput analytically.

Further White Paper Details
Publisher	University of Namur	File Format	PDF
Date Published	January 2007
Format	White Papers
Topics	TCP - IP

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