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This paper presents an empirical discussion on the design and implementation of a power-efficient Medium Access Control (MAC) protocol for in-body and on-body sensor networks. We analyze the performance of a beacon enabled IEEE 802.15.4, PB-TDMA, and S-MAC protocols for on-body sensor networks. We further present a Traffic Based Wakeup Mechanism that(More)
Ultra-wide bandwidth (UWB) is a prospective radio technology for wireless networks. As being approval by FCC, UWB radio has received much attention. In this paper, we propose a new multiple access protocol for time-hopping UWB ad-hoc network. As UWB system is a carrier-less impulse radio system, it is cumbersome to implement the carrier sensing capability(More)
Energy conservation is an important issue in wireless networks, especially for self-organized, low power, low data-rate impulse-radio ultra-wideband (IR-UWB) networks, where every node is a battery-driven device. To conserve energy, it is necessary to turn node into sleep state when no data exist. This paper addresses the impact of two kinds of sleeping(More)
— In this paper, we analyze and evaluate the performance of IEEE 802.15.3c MAC standard, especially for high-definition uncompressed video transmission. At first, the improvements of IEEE 802.15.3c MAC, such as aggregation method and block ACK, are discussed. Then the transmission efficiency concerned with superframe size, channel time allocation, ACK(More)
In this paper, a novel location-aided routing (LAR) scheme for ultra-wideband (UWB) ad-hoc networks is proposed and evaluated. Our LAR scheme utilizes the positioning capability of UWB systems and takes into account the TCP performance on a route. Based on the estimation of TCP throughput, LAR selects the route that can bear highest throughput. The(More)
In this paper, a practical location-aided routing method for sensor networks based on ultra-wideband (UWB) technique is proposed and evaluated. This method makes use of the positioning function of UWB and takes info account the energy consumption in the network. By modeling the property of energy consumption, we find that energy and quality-of-service (QOS)(More)
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