More info here.
Archive for the ‘wsn-papers’ Category
Frequency overlap across wireless networks with different radio technologies can cause severe interference and reduce communication reliability. The circumstances are particularly unfavorable for ZigBee networks that share the 2.4 GHz ISM band with WiFi senders capable of 10 to 100 times higher transmission power.
Our work first examines the interference patterns between ZigBee and WiFi networks at the bit-level granularity. Under certain conditions, ZigBee activities can trigger a nearby WiFi transmitter to back off, in which case the header is often the only part of the ZigBee packet being corrupted. We call this the symmetric interference regions, in comparison to the asymmetric regions where the ZigBee signal is too weak to be detected by WiFi senders, but WiFi activity can uniformly corrupt any bit in a ZigBee packet. With these observations, we design BuzzBuzz to mitigate WiFi interference through header and payload redundancy. Multi-Headers provides header redundancy giving ZigBee nodes multiple opportunities to detect incoming packets.
Then, TinyRS, a full-featured Reed Solomon library for resource-constrained devices, helps decoding polluted packet payload. On a medium-sized testbed, BuzzBuzz improves the ZigBee network delivery rate by 70%. Furthermore, BuzzBuzz reduces ZigBee retransmissions by a factor of three, which increases the WiFi throughput by 10%.
Read the complete paper here.
A new guide book is available both for newcomers, experienced engineers and developers in the area of IP-based smart objects/wireless sensor networks/the Internet of things. The book covers a broad area including architecture, technology, applications with a significant depth in routing protocols and software implementation.
A one-page paper announcing that wireless technology is for the birds. Or at least the chickens. Michigan State University has plucked a $375,000 federal grant to study the habits of commercial egg-laying hens by using wireless sensors to track “activity profiles.” That’s academic speak for how the hens pass the time when not laying eggs, cackling or playing coy with roosters.
The U.S. Department of Agriculture is paying researchers to hook up chickens with a “hen-mountable wireless system” to study how they interact with other birds. The work will help the farmers know how much space hens need and what types of “non-cage housing systems” will provide the “best possible welfare for the animals,” according to MSU.
“Ultimately, the sensors will tell us what behavior a hen is performing. Is she laying an egg? Eating? Or roosting on a perch? Does she fly or walk to move around?” Janice Siegford, a professor of animal science at MSU, said in a statement.
More info here.
Researcher Carlo Alberto Boano, formerly at SICS, received the Bengt Asker Award for his thesis: Application Support Design for Wireless Sensor Networks (Zip 10 MB).
The award is given by The Swedish National Real-Time Association for the best Swedish master or final year thesis in the field of real-time and embedded systems.
The research work was conducted within the Center for Networked Systems. The author was jointly supervised by Pablo Suarez (Saab) and Thiemo Voigt (SICS).
Congratulations from the WSNBlog team!
Innovative uses of advanced sensors and sensor networks are starting to be translated into new ecological knowledge. These sensors are providing a new set of “eyes” through which researchers may observe the world in new ways, extend spatial and temporal scales of observation, more accurately estimate what cannot be observed, and, most important, obtain unexpected results or develop new paradigms. Automated sensors are widely deployed by members of the Organization of Biological Field Stations, yet some needs—particularly for chemical and biological sensors—are not currently being met. There are additional opportunities for developing sensor networks at synoptic, regional, continental, and global scales. Although we are seeing more uses of sensor systems and, in particular, sensor networks, the opportunities for these systems are just beginning to be realized, with much more work to be done, including formulation of new questions, development of new sensors, better software, and new ways for researchers to work together across large distances.
From a paper in BioScience, May 2009, by American Institute of Biological Sciences
Full text available here (campus/library subscription required)
The D3S group has developed a WSN-based system to monitor the structural health of a medieval tower of Torre Aquila in Trento, Italy, part of the Castello del Buonconsiglio complex, which hosts world-renowned frescoes from the 13th century. The system has been running since August 2008, and monitors vibrations, deformation, humidity, and temperature.
D3S is a research group involving researchers from the Department of Information Engineering and Computer Science of the University of Trento and FBK-IRST.
The hardware platform and custom sensors for this project were provided by TRETEC. The project is in collaboration with structural engineers at the Department of Mechanical and Structural Engineering at the University of Trento, who are currently developing models to study the conditions of the tower based on the data provided by the system.
A live data feed from the sensors deployed is available, requires java enabled browser and some ports open in the network.
More information about the project can be found here.
With the explosive proliferation of mobile communication and wireless computing devices, the scalability property is becoming an increasingly popular and important issue in wireless communication research, as it has been recognized as one of the key features for supporting pervasive networking scenarios.
The International Journal of Communication Networks and Distributed Systems (IJCNDS) has a call for papers for a special issue on “Scalable Wireless Neworks”.
The aim of this special issue is to bring together the state-of-the-art research contributions that address the major opportunities and challenges of scalable wireless communication and networking, with emphasis on the design, analysis and evaluation of new techniques and novel application scenarios.
Specific topics of interest and CFP are available here
Paper submission due: 1 October, 2009
Notification of acceptance: 15 January, 2010
Camera-ready version due: 1 March, 2010
ISPN’09 was held last month in San Francisco. The conference featured two interleaved tracks, the Information Processing (IP) track, and the Sensor Platforms, Tools and Design Methods (SPOTS) track. Each of which selected best paper awards.
The former one had two nominations: one best paper award and a best student paper award, which correponded to: Secure and Highly-Available Aggregation Queries in Large-Scale Sensor Networks via Set Sampling by Haifeng Yu (National University of Singapore) and On Hierarchical Routing in Wireless Sensor Networks by Konrad Iwanicki et al (VU Amsterdam), respectively.
On the SPOTS track the award corresponds to Monitoring Heritage Buildings with Wireless Sensor Networks: The Torre Aquila Deployment by M. Ceriotti et al (Bruno Kessler Foundation / University of Trento / TRETEC)
Check out our previous post from EWSN’09 and go figure who made two awards in a row this year!
Congrats to all the authors for the good work.