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Providing Adaptive QoS in Wireless Networks by Traffic Shaping

Fulltext:


Authors:

Tomas Lennvall, Gerhard Fohler

Publication Type:

Conference/Workshop Paper

Venue:

Resource management for media processing in networked embedded systems (RM4NES)

Abstract

Our goal is to stream video over a wireless network by dynamically adapting the size of the stream according to the fluctuating available bandwidth in the network.In this paper we propose an architecture that provides QoS by dynamically adapting the transmission rate of nodes to match the currently available bandwidth of a wireless network.The architecture prioritizes real-time traffic over non real-time traffic when transmitting packets.The traffic adaptation serves the purpose of minimizing the network congestion occurring due to high load.The architecture consists of a bandwidth predictor that first uses a simple probe-packet technique to predict the available bandwidth of the network.Then, exponential averaging is used to predict the future available bandwidth based on the current measurement and the history of previous predictions.This predicted bandwidth is then fed into the traffic shaping part of the architecture, which adjusts the transmission rate of the node accordingly.

Bibtex

@inproceedings{Lennvall696,
author = {Tomas Lennvall and Gerhard Fohler},
title = {Providing Adaptive QoS in Wireless Networks by Traffic Shaping},
month = {March},
year = {2005},
booktitle = {Resource management for media processing in networked embedded systems (RM4NES)},
url = {http://www.es.mdu.se/publications/696-}
}