Improving the transmission of video and data in wireless networks
type: Dataset
description: This thesis deals in improving the data transfer on wireless networks and for the continuous data such as video. To improve transmission over wireless networks, we were interested in congestion control transport protocols and we also proposed a practical method for adjusting the video rate to network conditions.This thesis composes of two parts. The first part concerns the loss differentiation between congestion losses and losses on the wireless network. It is known that when there is a loss, transport protocols reduce the current sending rate (e.g. by two). However, for wireless losses, it has no interest in reducing the rate. To differentiate these losses on the data senders side, we propose a novel method that uses both the ECN (Explicit Congestion Notification) and the change of RTT of the packet following the loss. The second part proposes a novel method for video adaptation at the application layer of the sender. With the advent of high bitrate video (e.g. HD, 3D) and steadily increasing but irregular network bandwidth, video quality to the user lags. It is non-optimal (bitrate is highly smaller or larger than the available bandwidth) and not adaptable (to the dynamic conditions of the network). We propose a simple method to implement, since it requires a change only at the application layer of the sender. It adapts the bitrate of the video to the network conditions, i.e. it is a congestion control on the transmitter. Videoconferencing is an ideal case for the application of adaptation. This method works over any transport protocol with congestion control (e.g. TCP, DCCP), which also confers the property of TCP-friendliness.
identifier: NNT: 2011BESA2009
issued: 2026-05-12T06:06:26.953992
language: fr
modified: 2026-05-12T06:06:26.953999
contact point: Organization
  fn: CCSD
keyword: adaptation-de-la-video
keyword: differenciation-de-pertes
keyword: evitement-doscillation
keyword: infoeu-reposemanticsdoctoralthesis
keyword: infoinfo-ohcomputer-science-csother-csoh
keyword: loss-differentiation
keyword: multimedia
keyword: multimedia-computing
keyword: networks
keyword: protocoles-de-transport
keyword: reseaux
keyword: sans-fil
keyword: streaming
keyword: theses
keyword: transport-protocols
keyword: video-adaptation
keyword: wireless
landing page: https://theses.hal.science/tel-00802909

Improving the transmission of video and data in wireless networks
type: Distribution
format: HTML
issued: 2026-05-12T06:06:27.062727
modified: 2026-05-12T06:06:26.920096
access URL: https://theses.hal.science/tel-00802909

test_moissonnage_selune
type: Agent