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Adaptive Hybrid Compression for Wireless Sensor Networks
Azad Ali, Abdelmajid Khelil, Neeraj Suri, Mohammadreza Mahmudimanesh
Article No.: 53
Wireless Sensor Networks (WSNs) are often deployed to sample the desired environmental attributes and deliver the acquired samples to a central station, termed as the sink, for processing as needed by the application. Many applications stipulate...
Adapting Distributed LT codes to Y-Networks: An Abstraction of Collection Tree in Sensor Networks
Saber Jafarizadeh, Abbas Jamalipour
Article No.: 54
The conventional approach for collecting data in sensor networks is the combination of automatic repeat-request techniques with a collection tree scheme in which all routes end up in the sink node. A high number of acknowledgments and...
In this article we present SmartRoad, a crowd-sourced road sensing system that detects and identifies traffic regulators, traffic lights, and stop signs, in particular. As an alternative to expensive road surveys, SmartRoad works on participatory...
Scheduling Survivability-Heterogeneous Sensor Networks for Critical Location Surveillance
Jie Tian, Tan Yan, Xin Gao, Guiling Wang
Article No.: 56
Sensor nodes deployed outdoors for field surveillance are subject to environmental detriments. In this article, we propose a heterogeneous sensor network composed of sensor nodes with different environmental survivability to make it robust to...
Optimizing Energy Efficiency for Minimum Latency Broadcast in Low-Duty-Cycle Sensor Networks
Lijie Xu, Guihai Chen, Jiannong Cao, Shan Lin, Haipeng Dai, Xiaobing Wu, Fan Wu
Article No.: 57
Multihop broadcasting in low-duty-cycle Wireless Sensor Networks (WSNs) is a very challenging problem, since every node has its own working schedule. Existing solutions usually use unicast instead of broadcast to forward packets from a node to its...
A novel algorithm is proposed for the distributed and location-free detection of boundaries in sensor networks. The approach allows a node to decide autonomously, based solely on connectivity information of a small 2-hop neighborhood, whether it...
Terra is a system for programming wireless sensor network (WSN) applications. It combines the use of configurable virtual machines with a reactive scripting language that can be statically analyzed to avoid unbounded execution and memory...
iDiary: From GPS Signals to a Text- Searchable Diary
Dan Feldman, Cynthia Sung, Andrew Sugaya, Daniela Rus
Article No.: 60
This article describes iDiary, a system that takes as input GPS data streams generated by users’ phones and turns them into textual descriptions of the trajectories. The system features a user interface similar to Google Search that allows...
Network Coding-Aware Compressive Data Gathering for Energy-Efficient Wireless Sensor Networks
Dariush Ebrahimi, Chadi Assi
Article No.: 61
This article investigates the joint application of compressive sensing (CS) and network coding (NC) to the problem of energy-efficient data gathering in wireless sensor networks. We consider the problem of optimally constructing forwarding trees...
Energy-Harvesting Active Networked Tags (EnHANTs): Prototyping and Experimentation
Robert Margolies, Maria Gorlatova, John Sarik, Gerald Stanje, Jianxun Zhu, Paul Miller, Marcin Szczodrak, Baradwaj Vigraham, Luca Carloni, Peter Kinget, Ioannis Kymissis, Gil Zussman
Article No.: 62
This article focuses on a new type of wireless devices in the domain between RFIDs and sensor networks—Energy-Harvesting Active Networked Tags (EnHANTs). Future EnHANTs will be small, flexible, and self-powered devices that can be attached...
As a supporting primitive of many mobile applications, neighbor discovery identifies nearby devices so that they can exchange information and collaborate in a peer-to-peer manner. To date, discovery schemes trade a long latency for energy...
REACH2-Mote: A Range-Extending Passive Wake-Up Wireless Sensor Node
Li Chen, Jeremy Warner, Pak Lam Yung, Dawei Zhou, Wendi Heinzelman, Ilker Demirkol, Ufuk Muncuk, Kaushik Chowdhury, Stefano Basagni
Article No.: 64
A wireless sensor network that employs passive radio wake-up of the sensor nodes can reduce the energy cost for unnecessary idle listening and communication overhead, extending the network lifetime. A passive wake-up radio is powered by the...