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The demands for higher data rate in Wireless personal area network (WPAN) than one in Bluetooth has been completed with IEEE 802.15.3 standard. The standard, named High-rate WPAN (HR-WPAN), adopts TDMA-based Medium access control (MAC) protocol. In this paper, we propose novel MAC protocol and scheduling algorithm to achieve efficient time-slots allocation. Time slots for data transmissions are allocated by two steps. In the first step, the time slots are initially allocated using a proposed allocation algorithm based on statistical packet inter-arrival time. Then, the initial allocation is dynamically adjusted by utilizing feedback information coming from each device. Performance evaluations are carried out through extensive simulations and significant performance enhancements are observed. 相似文献
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近年来,超宽带(UWB)无线通信成为短距离、高速度无线网络最热门的物理层技术之一。本文介绍了UWB的发展历史,详细归纳了其技术特性,总结了该技术在无线个域网中的最新应用,并对前景作出了展望。 相似文献
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目前,大量的无线设备应用在2.4GHz这一开放频段,很明显各种设备之间存在着潜在的干扰问题,在将来的办公或家庭环境中,如何避免或减少各种WPAN设备与WLAN的相互射频干扰的问题变得重要起来.本文将分析由UWB、ZigBee技术分别构成的两种新型WPAN设备和WLAN之间的影响,分别从WLAN设备链路的吞吐量和信噪比等角度分析了802.11b WLAN和两种短距离技术设备的干扰,并进行了WPAN设备的工程实验和模拟仿真. 相似文献