Directed diffusion: a scalable and robust communication paradigm for sensor networks
MobiCom '00 Proceedings of the 6th annual international conference on Mobile computing and networking
Dominating Sets and Neighbor Elimination-Based Broadcasting Algorithms in Wireless Networks
IEEE Transactions on Parallel and Distributed Systems
Routing with guaranteed delivery in ad hoc wireless networks
Wireless Networks
Wireless sensor networks for habitat monitoring
WSNA '02 Proceedings of the 1st ACM international workshop on Wireless sensor networks and applications
Wireless sensor networks: a survey
Computer Networks: The International Journal of Computer and Telecommunications Networking
Proceedings of the 10th international conference on Architectural support for programming languages and operating systems
Power-Aware Localized Routing in Wireless Networks
IEEE Transactions on Parallel and Distributed Systems
Lightweight sensing and communication protocols for target enumeration and aggregation
Proceedings of the 4th ACM international symposium on Mobile ad hoc networking & computing
Energy-Efficient Communication Protocol for Wireless Microsensor Networks
HICSS '00 Proceedings of the 33rd Hawaii International Conference on System Sciences-Volume 8 - Volume 8
GPS-Free Positioning in Mobile ad-hoc Networks
HICSS '01 Proceedings of the 34th Annual Hawaii International Conference on System Sciences ( HICSS-34)-Volume 9 - Volume 9
Multipoint Relaying for Flooding Broadcast Messages in Mobile Wireless Networks
HICSS '02 Proceedings of the 35th Annual Hawaii International Conference on System Sciences (HICSS'02)-Volume 9 - Volume 9
TiNA: a scheme for temporal coherency-aware in-network aggregation
Proceedings of the 3rd ACM international workshop on Data engineering for wireless and mobile access
Hardware design experiences in ZebraNet
SenSys '04 Proceedings of the 2nd international conference on Embedded networked sensor systems
A line in the sand: a wireless sensor network for target detection, classification, and tracking
Computer Networks: The International Journal of Computer and Telecommunications Networking - Special issue: Military communications systems and technologies
Snapshot Queries: Towards Data-Centric Sensor Networks
ICDE '05 Proceedings of the 21st International Conference on Data Engineering
TAG: a Tiny AGgregation service for Ad-Hoc sensor networks
OSDI '02 Proceedings of the 5th symposium on Operating systems design and implementationCopyright restrictions prevent ACM from being able to make the PDFs for this conference available for downloading
VigilNet: An integrated sensor network system for energy-efficient surveillance
ACM Transactions on Sensor Networks (TOSN)
Meteorology and hydrology in Yosemite national park: a sensor network application
IPSN'03 Proceedings of the 2nd international conference on Information processing in sensor networks
Relative location estimation in wireless sensor networks
IEEE Transactions on Signal Processing
Statistical location detection with sensor networks
IEEE Transactions on Information Theory
CollECT: Collaborative event detection and tracking in wireless heterogeneous sensor networks
Computer Communications
Spatio-temporal monitoring using contours in large-scale wireless sensor networks
Proceedings of the 2nd ACM international workshop on Foundations of wireless ad hoc and sensor networking and computing
Decentralized area computation for spatial regions
Proceedings of the 17th ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems
Multimodal analysis of body sensor network data streams for real-time healthcare
Proceedings of the international conference on Multimedia information retrieval
Detecting change in snapshot sequences
GIScience'10 Proceedings of the 6th international conference on Geographic information science
A parallel solution for high resolution histological image analysis
Computer Methods and Programs in Biomedicine
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In many applications of sensor networks, the sink needs to keep track of the history of sensed data of a monitored region for scientific analysis or supporting historical queries. We call these historical data as a time series of value distributions, or snapshots. Obviously, to build the time series snapshots by requiring all the sensors to transmit their data to the sink periodically is not energy-efficient. In this paper, we introduce the idea of gradient boundary, and propose a gradient boundary detection (GBD) algorithm to construct these time series snapshots of a monitored region. In GBD, a monitored region is partitioned into a set of sub-regions and all sensed data in one sub-region are within a predefined value range, namely gradient interval. Sensors located on the boundaries of the sub-regions are required to transmit the data to the sink, and then the sink recovers all sub-regions to construct snapshots of the monitored area. In this process, only the boundary sensors transmit their data, and therefore, energy consumption is greatly reduced. The simulation results show that GBD is able to build snapshots with a comparable accuracy and has up to 40% of energy saving compared with the existing approaches for large gradient intervals.