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The Disaster and Emergency Warning Network (DEWN) is a last-mile disaster early warning system based on a suite of mobile technologies. It alerts citizens of impending disasters through SMS/Cell Broadcast activated remote-alarm devices, cell broadcasting to handsets and multi-lingual SMS.
Since the natural resources of electromagnetic spectrum are strictly administrated, the channel assignment problem (CAP) has been an important issue for cellular mobile network. CAP is a well-known NP-hard problem, which is to minimize the maximum of channel utilization, while guaranteeing the voice quality. In this paper, we model CAP as a Distributed Constraint Satisfaction Problem (DCSP) with fully...
OFCOM issued 2 consultation reports about dasiadigital dividend review (DDR)psila in June 2008. We can review the purpose & bandwidth of cleared spectrum by digital switchover. In these reports, you can see the purpose of digital dividend spectrum, the steps & time of frequency auctions and etc in detail. Also, we can see the consultations of OFCOM about digital dividend spectrum. OFCOM proposed...
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