Abstract
Ultra wideband (UWB) technology has emerged as a solution for the wireless interface between medical sensors and a personal server in future telemedicine systems. The WiMedia Alliance has specified a distributed medium access control protocol based on UWB for high-rate WPANs. Because WiMedia devices transmit data frames using CSMA/CA in PCA duration, waste of time slot interval occurs by collision, and data transmission and the overall throughput is decreased. Therefore, we propose medium access scheme to improve conflict and channel waste and to minimize contention by using own beacon slot number and neighbor's beacon slot number. Simulation results have shown that the proposed scheme has excellent performance in terms of throughput, delay, jitter, and fairness.
Published Version
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