Title :
Available Bandwidth Estimation in IEEE802.11b Network Based on Non-Intrusive Measurement
Author :
Chen, Chen ; Pei, Changxing ; An, Liunai
Author_Institution :
Key Lab. of Comput. Networks & Inf. Security, Xidian Univ.
Abstract :
In this paper, we present a nonintrusive and time-based mechanism to estimate the available bandwidth of a node with the nodes collision and backoff stage taken into account. We first give a new definition of available bandwidth in IEEE802.11b network to reflect the collision and contention between nodes. Then, the investigated node obtains the NAV information of its neighbors within the measurement duration through CSMA/CA mechanism and stores the information into its routing buffers. Subsequently, we obtain the available bandwidth of the investigated node by calculate the ratio of its channel accessible time to the measurement duration, which should subtract the sum of NAV values of its neighbors and the backoff time itself from the measurement duration. Simulation shows the proposed scheme is accurate and can completely reflect the collision and contention between nodes
Keywords :
IEEE standards; bandwidth allocation; carrier sense multiple access; wireless LAN; CSMA/CA mechanism; IEEE802.11b network; NAV information; bandwidth estimation; node bandwidth; node collision; node contention; nonintrusive measurement; routing buffers; time-based mechanism; wireless LAN; Bandwidth; Buffer storage; Communication system control; Computer networks; Computer science education; Decoding; Laboratories; Multiaccess communication; Routing; Time measurement;
Conference_Titel :
Parallel and Distributed Computing, Applications and Technologies, 2006. PDCAT '06. Seventh International Conference on
Conference_Location :
Taipei
Print_ISBN :
0-7695-2736-1
DOI :
10.1109/PDCAT.2006.39
