A hand-off mechanism of mobile nodes in a location positioning system based on ZigBee tags
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Location awareness is one of the key functions to build an U-city. Recently, many of works for the location-aware systems are emerging to be applied to on-going large-scale apartment complex. For example, whendwellers or cars with active tags are move in the apartment complex, the active tags broadcast their own identifiersperiodically and receivers such that routers use this information to calculate the location of the active tags. Since the active tags can actually move between routers and coordinators, it requires a hand-off mechanism. Inthis paper, we investigate the hand-off problem occurred in location awareness system based on ZigBee activetags. We propose and analyze a new approach for handling the hand-off problem. Through a mathematical analysis,we show that our approach diminishes the quantity of packet transfer than ZigBee's approach.
Abstract
Location awareness is one of the key functions to build an U-city. Recently, many of works for the location-aware systems are emerging to be applied to on-going large-scale apartment complex. For example, whendwellers or cars with active tags are move in the apartment complex, the active tags broadcast their own identifiersperiodically and receivers such that routers use this information to calculate the location of the active tags. Since the active tags can actually move between routers and coordinators, it requires a hand-off mechanism. Inthis paper, we investigate the hand-off problem occurred in location awareness system based on ZigBee activetags. We propose and analyze a new approach for handling the hand-off problem. Through a mathematical analysis,we show that our approach diminishes the quantity of packet transfer than ZigBee's approach.
참고문헌 (10)
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