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Radio Propagation Model for Long-Range Wireless Sensor Networks
White Papers Wireless Sensor Networks are ideal for monitoring environmental conditions, but typical nodes are limited by their short transmission range. A novel radio propagation model is presented, which has been experimentally verified.
[April 23, 2009, 1:24]
Multi-Hop RFID Wake-Up Radio: Design, Evaluation and Energy Tradeoffs
White Papers Current energy-efficient mechanisms employ either duty cycling, which reduces idle listening but does not eliminate it, or low power wake-up radio, which adds complexity and cost to the sensor platform.
[April 14, 2009, 0:00]
ZigBee product flood defies sceptics
News Product announcements are flooding out for ZigBee, a low-power sensor networking standard, but rivals continue to maintain their technologies also have a place. Intel is also working on sensor network technologies, but has not joined the ZigBee...
[September 14, 2005, 14:15]
Radio-Frequency Identification (RFID): Drivers, Challenges and Public Policy Considerations
White Papers Radio Frequency IDentification (RFID) is one of several automatic identification sensor-based technologies consisting of three key elements: RFID tags; RFID readers (transceivers); and a data collection, distribution, and management system that...
[May 10, 2006, 1:00]
Atific Helicopter High Performance Multi-Radio WSN Platform
White Papers This white paper presents the design and implementation of a high performance multi-radio Wireless Sensor Network (WSN) platform. The use of four parallel radio transceivers with 83 selectable frequency channels allows the development of...
[October 22, 2008, 1:01]
Wireless Sensor Networks and RFID Integration for ContextAware Services
White Papers Off late, the debate over the integration of Wireless Sensor Networks (WSN) and Radio Frequency Identification (RFID) has garnered an increasing amount of attention despite their appearing to be disparate technologies.
[April 14, 2009, 0:00]
Towards TCP/IP for Wireless Sensor Networks
White Papers Wireless sensor networks are composed of large numbers - up to thousands - of tiny radio-equipped sensors. Every sensor has a small microprocessor with enough power to allow the sensors to autonomously form networks through which sensor information...
[December 27, 2007, 0:01]
Efficiency Centric Communication Model for Wireless Sensor Networks
White Papers Recent studies on radio reality provided strong evidence that radio links between low-power sensor devices are extremely unreliable. This paper studies how to improve energy efficiency for reliable communication using such unreliable links.
[August 25, 2007, 1:00]
Adaptive Power Control Protocol With Hardware Implementation for Wireless Sensor and RFID Reader Networks
White Papers The development and deployment of Radio Frequency Identification (RFID) systems render a novel distributed sensor network which enhances visibility into manufacturing processes. In RFID systems, the detection range and read rates will suffer from...
[April 14, 2009, 0:00]
A Protocol Architecture for Wireless Sensor Networks
White Papers Huge strides taken in sensing technology, low-power microcontrollers and communication radio have spurred the mass production of relatively inexpensive sensor nodes. Wireless Sensor Networks (WSN) is a new class of networking technology that is...
[August 23, 2007, 1:00]
MMSN: Multi-Frequency Media Access Control for Wireless Sensor Networks
White Papers In wireless sensor networks, each device is typically equipped with a single radio transceiver and applications adopt much smaller packet sizes compared to those in general wireless ad hoc networks. Multi-frequency media access control has been...
[August 25, 2007, 1:00]
The Design and Implementation of an IP-Based Sensor Network for Intrusion Monitoring
White Papers The paper has also learned that the software development process is very time consuming unless support for over-the-air reprogramming is implemented, and that the unpredictability of radio conditions make sensor node placement hard.
[December 27, 2007, 0:01]
Comparing Energy-Saving MAC Protocols for Wireless Sensor Networks
White Papers The low message rate that is typical for sensor network applications and the relaxed latency requirements allow for significant reductions in energy consumption of the radio. Applications for wireless sensor networks have notably different...
[May 12, 2006, 1:00]
Monte-Carlo Localization for Mobile Wireless Sensor Networks
White Papers Localization is crucial to many applications in wireless sensor networks. This paper proposes a range-free anchor-based localization algorithm for mobile wireless sensor networks that builds upon the Monte Carlo Localization algorithm.
[August 17, 2007, 10:25]
Wireless Sensor Monitoring Combined With RFID Networks
White Papers AXCESS has provided its ActiveTag on-demand, semi-active RFID technology to the RFID/Sensor's Convergence Laboratory for students to research and develop applications for business projects. This paper describes the development of a RFID/Sensor...
[April 14, 2009, 0:00]
Hardware Assisted Compression in Wireless Sensor Networks
White Papers A Wireless Sensor Network (WSN) is comprised of resource constained devices called motes. The bulk of power usage for standard WSN applications lies in the radio where receiving and sending packets are necessary to communicate to a base station (as...
[August 13, 2007, 15:14]
On the RFID Wake-Up Impulse for Multi-Hop Sensor Networks
White Papers Communication protocols for wireless sensor networks reduce the energy consumption by duty cycling the node activity and adopting a periodic sleeping scheduling. Proposed solutions mitigate this issue for example through extra low-power radio...
[April 14, 2009, 0:00]
Setting radio free
News Cognitive radios can only identify transmitters, not receivers, so you get the hidden terminal problem [where one side of a link is inaudible to a sensor because it's too far away or shielded]. The Open Future for Wireless Communications conference...
[May 9, 2005, 11:10]
IBM introduces RFID tools
News IBM's new software can read and work with either ultra-high-frequency and high-frequency radio tags, or across both radio broadcast frequencies, using EPC Information Services technology, said Christian Clauss, who works on sensor information...
[December 18, 2006, 11:35]
Computers: Just another commodity?
News If you take something as simple as sensor devices, like RFIDs (radio frequency identification), and, if Wal-Mart put RFIDs on every item on their store, it would generate something like 7.5 million terabytes of new data every day.
[October 3, 2003, 10:54]
