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Concurrent access among multiple mobile readers brings about a new problem called reader collision that a readerpsilas transmission is interfered by the others. There have been several works to solve the reader collision problem. While they employ time division, frequency division, space division, or centralized scheduling approach, in this paper, we introduce a cooperative, distributed reader collision...
Among the research community, on-going efforts are being continued to efficiently interconnect MANETs to fixed infrastructure in order to expand the reach of the Internet to Wireless access networks. Such scenario gives raise to a number of challenges that require solutions involving Internet gateway selection scheme, extensions to ad hoc routing technique. In this paper, we depict a network architecture...
This paper establishes ACE system that supports active emergency call service. ACE system is physically composed of E-device (emergency mobile device) for the handicapped, single elderly, and children, and E-server (emergency server) with realtime monitoring management feature. E-device reports emergency situation to emergency institutions and the user's guardian through Internet or CDMA. Therefore,...
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