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Title: A medium access control protocol for UWB sensor networks with QoS support
Authors: Tan, J.
Chan, M.-C. 
Tan, H.-X.
Kong, P.-Y.
Tham, C.-K.
Issue Date: 2008
Citation: Tan, J.,Chan, M.-C.,Tan, H.-X.,Kong, P.-Y.,Tham, C.-K. (2008). A medium access control protocol for UWB sensor networks with QoS support. Proceedings - Conference on Local Computer Networks, LCN : 289-296. ScholarBank@NUS Repository.
Abstract: Ultra-wideband (UWB) is a physical (PHY) layer technology that promises high transmission rates, as well as high resistance to noise and multipath effects. However, the impulse-based nature of UWB, coupled with its low transmission power, makes it difficult to enable efficient detection of the signals. Consequently, conventional carrier-sensing based MAC protocols cannot be used with a UWB PHY. In this paper, we propose SASW-CR - a Slotted Aloha MAC protocol for UWB networks with Sliding contention Window and Coperative Retransmissions, which provides QoS support without the use of carrier sensing. SASW-CR utilizes the slotted-Aloha technique to avoid carrier sensing and reduce packet collisions. In addition, it makes use of differentiated contention windows to provide varying classes of QoS for different traffic classes. A cooperative retransmission technique is also introduced to improve the overall traffic throughput and reduce end-to-end delay. The efficacy of our protocol is demonstrated through simulations. ©2008 IEEE.
Source Title: Proceedings - Conference on Local Computer Networks, LCN
ISBN: 9781424424139
DOI: 10.1109/LCN.2008.4664182
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