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IEEE 1725 standard was developed for rechargeable lithium ion and lithium polymer batteries used in cellular devices. The standard establishes criteria for design analysis quality and reliability. The CTIA - the wireless association developed a battery certification program to verify the conformance of cellular devices to IEEE 1725. The CTIA program categorizes the cellular device as a host and its...
In recent years the onboard storage on wireless sensor motes has grown very dramatically, going from Kilobytes (KB) of available space to Gigabytes (GB). This massive increase has primarily come from the addition of support for micro or mini Secure Digital (SD) flash cards on the nodes. This extra storage capacity has led to new use cases for sensor motes which result in fewer data transmissions as...
In order to solve the problem of short continuous driving mileage and long charging time of electric vehicle (EV), the method of auto and rapid exchange system of EV battery cases is proposed. The exchange system deals with corresponding control of multi-components which are relatively moving each other. Based on single chip wireless transceiver nRF905 and MC68HC908GZ16, the wireless communication...
This paper discusses new enhancements that are being made to the existing dasiaSmart Sediment Particlepsila. The smart sediment particle has been designed and implemented to track its own 3-dimensional trajectory when placed in a riverbed. This device serves as a tool to detect sedimentation in rivers. The device has been developed over the years, with its size diminishing significantly down to a...
The present paper presents considerations on using a low power routing solution for prolonging the battery life for motes within a wireless sensor network (WSN) without affecting the network connectivity. The solution applies for the cases when, the distances between motes and base stations are over the mote's communication range, and motes located between sinks and base station are commonly used...
While wireless sensor networks have important applications in many fields, the limited battery life and high deployment cost pose serious challenges. One way to maintain good coverage and extend the network lifetime is to deploy sensors in high density and schedule them to sleep between active cycles. In this paper, we propose an algorithm to schedule the sensors to sleep based on the area of overlapped...
Opportunistic routing (OR) schemes, such as ExOR, have been shown to provide significant throughput gains over traditional best-path routing schemes for wireless networks. Though the performance of OR schemes depend on the bit-rate, they currently use a fixed rate for transmitting packets. While several schemes have been proposed for selecting bit-rate for unicast transmission to a single receiver,...
Recent advances in wireless communications and micro-electro-mechanical systems have fostered the development of wireless sensor networks (WSNs) which consist of tiny, low-cost and low-power sensor nodes. Individual sensor nodes only have local views of the environment, but global views can be obtained by collaborative processing between densely deployed sensor nodes. Energy efficiency is critical...
We propose a new clustering scheme for mobile ad hoc networks (MANETs), which can maintain a stable clustering structure by predicting the staying time for a cluster and selecting an optimal clusterhead (CH) which a node affiliates with. In the proposed scheme, when there are multiple CHs in the nodepsilas one hop neighbors at the initial clustering set-up or the nodepsilas movement to the outside...
The increasing ubiquity of mobile embedded systems has been matched by the evolution of a variety of wireless network standards and technologies. The major constraints of wireless embedded systems are limitations of communication bandwidth, processing capabilities, and battery power. Remote wireless embedded systems often act as sensors, which provide data to a certain community. The exchange of data...
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