| Publisher | Association for Computing Machinery | ||
|---|---|---|---|
| Format | 681.4KB PDF | Date added | 29 Jun 2006 |
| Topics | Monitoring Systems, Mobile - Wireless Communications | ||
| Downloads | 18 | ||
Monitoring is an issue of primary concern in current and next generation networked systems. The objective of sensor networks is to monitor their surroundings for a variety of different applications like atmospheric conditions, wildlife behavior, and troop movements among others. Similarly, monitoring in data networks is critical not only for accounting and management, but also for detecting anomalies and attacks. Such monitoring applications are inherently continuous and distributed, and must be designed to minimize the communication overhead that they introduce. In this context this paper introduces and studies a fundamental class of problems called "Thresholded counts" where one must return the aggregate frequency count of an event that is continuously monitored by distributed nodes with a user-specified accuracy whenever the actual count exceeds a given threshold value.
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