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Wireless devices are broadly adopted to the digital home environment, not least through integration of radios to Consumer Electronics (CEs) like TV screens or portable multimedia equipment. Accompanied by growth in wireless devices, demand on data rate increases, imposing new challenges on Medium Access Control (MAC) to improve channel access efficiency. Ultra Wideband (UWB) ECMA-368 offers very high...
Medium Access Control (MAC) protocols for Wireless Local Area Networks (WLANs) as well as Wireless Personal Area Networks (WPANs) like Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) are known to provide stable distributed channel access for multiple users. The wide acceptance of wireless systems operating in licensed-exempt frequencies demands for efficient spectrum usage of the...
With license-exempt usage, huge bandwidth and very low power consumption Ultra Wideband (UWB) technology is an attractive candidate for high-rate Wireless Personal Area Networks (WPANs). However, restricted power emission limits the maximal coverage range to a few meters. Especially for dense indoor UWB systems, wireless multi-hop communication extends the transmission range easily and cost-effectively...
A distributed medium access control (D-MAC) protocol has been proposed to support high-rate wireless personal area networks (HR-WPANs) by the WiMedia Alliance. The WiMedia D-MAC solves the problems of the IEEE 802.15.3 MAC caused its centralized architecture. However, due to mobility of WiMedia devices in multi-hop environment, DRP (distributed reservation protocol) reservation conflicts happen frequently...
In wireless networks, the physical layer adaptive modulation and coding (AMC) scheme has been proposed to improve bandwidth efficiency over the time-varying channel. In this paper, we study the performance of ultra-wideband (UWB) based wireless personal area network where AMC is coupled with the distributed reservation protocol (DRP) and the delayed- acknowledgement (Dly-ACK) schemes at the link layer...
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