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Distributed Address Assignment Mechanism (DAAM) has been suggested to be used in the ZigBee tree topology for its simplicity and efficiency. However, its topological parameter restricts the shape and extent of the networks, and results in orphan problem and poor coverage. Three alternatives are proposed and evaluated in this article. 2-layer DAAM (2DAAM) uses hierarchical scheme, which divides the...
Every year in Europe, about 1500 people die in traffic because they are not noticed by the truck driver. This problem could be solved by developing a wireless communication system where the truck driver and the cyclist are informed about each others presence. In this paper a test setup is presented in which the position of the cyclist is determined and displayed on a screen when being in the neighborhood...
This paper proposed a real-time children location detection system using combined GPS module and Zigbee module. When the systems detect child's presence, they have to transmit the alarm data to a remote center, connect to CCTV system. This paper shows the experimental result whether the children is, or not, in school zone. Also the proposed GPS and Zigbee system may be extended to various application...
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