Optimum Number of RLC Retransmissions for Best TCP Performance in UTRAN

摘要: As far as transfer reliability is concerned, the wireless segment of UTRAN weakest part an Internet session. To overcome this imperfection, RLC protocol features a link-level retransmission mechanism. In paper, we show by analytical means and computer simulations that for given block error rate (BLER), maximum number transmissions has very important impact on TCP performance, both round trip time (RTT) throughput. We extend link level automatic repeat request model proposed Peisa et al. (2001) to be able set transmissions, with help Padhye's throughput (2000), determine corresponding analytically. also that, knowing current BLER, network operator may tune retransmissions either reduce RTT or increase