New Cross-Layer Channel Switching Policy for TCP Transmission on 3G UMTS Downlink
<|reference_start|>New Cross-Layer Channel Switching Policy for TCP Transmission on 3G UMTS Downlink: In 3G UMTS, two main transport channels have been provided for downlink data transmission: a common FACH channel and a dedicated DCH channel. The performance of TCP in UMTS depends much on the channel switching policy used. In this paper, we propose and analyze three new basic threshold-based channel switching policies for UMTS that we name as QS (Queue Size), FS (Flow Size) and QSFS (QS & FS combined) policy. These policies significantly improve over a modified threshold policy in [1] by about 17% in response time metrics. We further propose and evaluate a new improved switching policy that we call FS-DCH (at-least flow-size threshold on DCH) policy. This policy is biased towards short TCP flows of few packets and is thus a cross-layer policy that improves the performance of TCP by giving priority to the initial few packets of a flow on the fast DCH channel. Extensive simulation results confirm this improvement for the case when number of TCP connections is low.<|reference_end|>
@article{kumar2006new,
    title={New Cross-Layer Channel Switching Policy for TCP Transmission on 3G UMTS
  Downlink},
    author={Dinesh Kumar (INRIA Sophia Antipolis), Dhiman Barman, Eitan Altman
  (INRIA Sophia Antipolis), Jean-Marc Kelif (FT R&D)},
    journal={arXiv preprint arXiv:cs/0608026},
    year={2006},
    archivePrefix={arXiv},
    eprint={cs/0608026},
    primaryClass={cs.NI}
}