New Cross-Layer Channel Switching Policy for TCP Transmission on 3G UMTS Downlink
type: Dataset
description: 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.
landing page: https://inria.hal.science/inria-00088730
identifier: Report N°: RR-5962
keyword: buffer-management
keyword: cross-layer
keyword: dch
keyword: fach
keyword: infoeu-reposemanticsreport
keyword: infoinfo-nicomputer-science-csnetworking-and-internet-architecture-csni
keyword: reports
keyword: resource
keyword: scheduling
issued: 2026-05-08T20:35:48.330998
modified: 2026-05-08T20:35:48.331003
language: en
contact point: Organization
  fn: CCSD

test_moissonnage_selune
type: Agent

New Cross-Layer Channel Switching Policy for TCP Transmission on 3G UMTS Downlink
type: Distribution
format: HTML
access URL: https://inria.hal.science/inria-00088730
issued: 2026-05-08T20:35:48.347403
modified: 2026-05-08T20:35:48.312228