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Researchers have been studying wireless networks for a number of years and have developed fairly sophisticated protocols using clustering, multi-hop routing, and direct communication approaches. We are developing communication protocols for sensor networks, which differ from traditional wireless networks in both the function that these networks serve and(More)
Organizing wireless sensor networks into clusters enables the efficient utilization of the limited energy resources of the deployed sensor nodes. However, the problem of unbalanced energy consumption exists, and it is tightly bound to the role and to the location of a particular node in the network. If the network is organized into heterogeneous clusters,(More)
Testing of the range and radiation pattern of wireless sensors is often not fully documented. In this paper, we perform a full characterization of the Tmote Sky motes from MoteIV Corporation. Packet yield, RSSI, and LQI are measured as a function of distance, angle, and transmit power, while taking environmental conditions into consideration. Wireless(More)
A plethora of cross-layer schemes exists today, and these protocols often provide ingenious ways to serve dedicated applications for wireless sensor networks. However, sensor network protocols often trade compatibility with other schemes for specialization. In this paper, we describe the beginning of an ambitious project to design a new architecture that(More)
In this paper, we address a fundamental problem concerning the optimal searching strategy in terms of searching cost for the multi-target discovery problem in wireless networks. In order to find the nearest k targets from a total of m members with the least cost , how many searching attempts should we use, and how large should each searching area be? After(More)
—This paper introduces a new IEEE standard, IEEE 802.15.5,which provides mesh capability for wireless personal area network (WPAN) devices. The standard provides an architectural framework enabling WPAN devices to promote in-teroperable, stable, and scalable wireless mesh topologies. It is composed of two parts: low-rate WPAN mesh and high-rate WPAN mesh.(More)
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