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Browse Prior Art Database

Resilient Wireless Emergency Notification System

IP.com Disclosure Number: IPCOM000031979D
Original Publication Date: 2004-Oct-18
Included in the Prior Art Database: 2004-Oct-18
Document File: 2 page(s) / 63K

Publishing Venue

IBM

Abstract

Current solutions for obtaining information such as satellite imaging or thermal sensors are not ideal for widespread use due to their high cost and low effectiveness. Often, data produced by current sensor solutions is unpredictable and is generated after the incident. Accordingly, such data cannot be relied upon to make timely decisions about how to deal with the emergency. Communicating the information collected by sensors can also be unpredictable since communication channels used to transmit the data may be affected by the emergency. If a critical communication node fails within a sensor network, critical information cannot be analyzed and acted upon in a timely fashion.

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Resilient Wireless Emergency Notification System

Sensor Networks, an emerging wireless technology, are self organizing and dynamically adapt to device failure and degradation. They manage movement of sensor nodes and react to changes in tasks and network requirements. Many disaster messaging systems for transmitting a targeted message to a monitoring center are known. This is typically accomplished by a wired or wireless communication apparatus which transmits an encoded signal to the monitoring center.

Current detection and monitoring systems for homes use a static infrastructure which relies on wired connections to a main station at home and then to a monitoring station. The static infrastructure extends to the communication between the home and the main monitoring station utilizing a cellular network. Current monitoring and detection systems cannot dynamically communicate with one another, which means that it only has a single communication path to the main station at home. Further, current systems can only perform a single function such as monitor, detect, or communicate.

The disclosed system addresses these problems by providing a resilient wireless emergency notification system that utilizes "smart dust" sensors or "motes" to detect changes in the environment and at selected locations. Data is transmitted through a mesh or ad hoc broadcast network. Each mote comprises a power source, a network node (e.g., a remote transceiver) and miniature devices capable of measuring environmental changes such as spikes in temperatures and the presence of dangerous gasses. The transmission of critical data is accomplished by a mesh or network that provides communication without dependency on a single point or base station. If a sensor is damaged or becomes unavailable, another functioning sensor can continue to transmit. A resilient wireless emergency notification system is achieved by identifying available sensors and communicating according to a network virtualization map.

The system comprises multiple motes with different sensors (e.g. heat detection sensor, gas detection sensor, vibration sensor), each mote having an ID which includes a sensor ID, a location ID, a reserved field for the future use, a resilient wireless communication system for communicating with neighboring motes and a central monitoring system.

When a mote sensor detects an input, a code or bit stream is sent to the control station. The bit streams may be defined as follows:

  Mote ID Sensor ID Location ID reserved 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000

Smart motes have the capability of having multiple sensors that enable the detection of various conditions, including fire, intrusion, chemical, heat and the like. In order to differentiate among multiple factors that the smart motes are able to dete...