Emerging opportunities for localization and tracking [Guest Editorial]
نویسندگان
چکیده
PS has been a phenomenal success. Simply consider as examples its use in car navigation systems or walking around city streets with the help of a smart phone. However, GPS is unavailable inside buildings, in urban canyons, underground, and underwater. Developing complementary location and tracking technologies for these environments would unleash the use of such capabilities in many applications in the military, public safety, and commercial arenas. Within residences and nursing homes, for example, there is an increasing need for indoor geolocation systems to track people with special needs, the elderly, and children to relieve the need for around-the-clock visual monitoring. Other applications include systems to assist the visually impaired, locate instrumentation and other equipment in hospitals, and track specific items in warehouses. In first responder/public safety and military applications, indoor geolocation systems are needed to monitor inmates in prisons, locate miners trapped in mines, and track/guide first responders and soldiers inside buildings. Given the growing interest in sensor networks and radio frequency identification (RFID) technologies, one can also envision wider-ranging applications such as locating unwanted chemical, biological, or radioactive materials using sensor networks, and tracking specific items such as controlled pharmaceuticals in their containers using RFID tags. Localization solutions may have different levels of complexity depending on application requirements and operational environment. For example, zone-level location accuracy via smart phones might be adequate in a shopping mall to determine a person's location relative to a certain store based on the strengths of the signals received from the mall WiFi network. On the other hand, firefighters entering a burning building cannot rely on availability of localization aids such as RFID tags/readers or a WiFi network in the building. Furthermore, the localization system required for this scenario must have an accuracy range of 1 m — if a rescue mission is to be launched — to 3 m. Also, such a system must work from the high floors of multistory buildings to possibly many levels underground and rely solely on the equipment the firefighters can bring to the scene. Under these circumstances, a hybrid solution employing various types of localization " sensors " and a smart data fusion algorithm to combine the sensor outputs is the most promising approach, but the challenge is to make the system small, robust, reliable, simple to use, and inexpensive. Even more complex would be a system for locating an intruder who breaks into a building. …
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عنوان ژورنال:
- IEEE Wireless Commun.
دوره 18 شماره
صفحات -
تاریخ انتشار 2011