Improvement of Channel Utilization for Contention-Basedireless Networks
Date Issued
2009
Date
2009
Author(s)
Tseng, Hsueh-Wen
Abstract
With the explosive growth of wireless subscribers, wireless communication technologieslay an increasingly important role in recent years. With the development of IEEE02.11 WLAN techniques, wireless network bandwidth has gradually become su±cientor many multimedia applications. Furthermore, the emergence of short-transmission-ange wireless devices further boosts the development of wireless personal area networksWPANs). When low cost and low power-consumption are considered, IEEE 802.15.4merges as a good alternative WPAN.o transmit data frames, both of wireless communication technologies (i.e., IEEE02.11 and 802.15.4) utilize contention scheme to access channel. The carrier senseultiple access/collision avoidance (CSMA/CA) and modify CSMA/CA mechanism aretilized in contention-based of IEEE 802.11 and IEEE 802.15.4 for access channel, re-pectively. However, the contention-based wireless networks encounter some problemsnd result in pretty bad channel performance. This dissertation proposes some schemeso improve the channel performance of contention-based wireless networks. Our schemesan solve the bottleneck of contention-based wireless networks under di®erent wirelessommunication technologies. Furthermore, we develop the analytical model and simula-ion model to investigate the performance of our schemes. The numerical results indicatehat performance of our schemes is superior to IEEE 802.11/IEEE 802.15.4 standard.
Subjects
EEE 802.11
CSMA/CA
Type
thesis
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