Accurate available bandwidth estimation in IEEE 802.11-based ad hoc networks

Authors:
Haitao Zhao;Emiliano Garcia-Palacios;Jibo Wei;Yong Xi
Affiliations:
School of Electronic Science and Engineering, National University of Defense Technology, 410073, China;ECIT, Queen's University of Belfast, Electrical and Electronic Engineering, NI Science Park, Queen's Road, Queen's Island, Belfast BT3 9DT, United Kingdom;School of Electronic Science and Engineering, National University of Defense Technology, 410073, China;School of Electronic Science and Engineering, National University of Defense Technology, 410073, China
Venue:
Computer Communications
Year:
2009

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Abstract

Quality of Service (QoS) support in IEEE 802.11-based ad hoc networks relies on the networks' ability to estimate the available bandwidth on a given link. However, no mechanism has been standardized to accurately evaluate this resource. This remains one of the main issues open to research in this field. This paper proposes an available bandwidth estimation approach which achieves more accurate estimation when compared to existing research. The proposed approach differentiates the channel busy caused by transmitting or receiving from that caused by carrier sensing, and thus improves the accuracy of estimating the overlap probability of two adjacent nodes' idle time. Simulation results testify the improvement of this approach when compared with well known bandwidth estimation methods in the literature.