332 search results - page 27 / 67 » Opportunistic Spectrum Access in Cognitive Radio Networks |
ICC
2007
IEEE
15 years 1 months ago
2007
IEEE
As the radio spectrum usage paradigm shifting from the traditional command and control allocation scheme to the open spectrum allocation scheme, wireless mesh networks meet new opp...
100
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ICC
2009
IEEE
15 years 4 months ago
2009
IEEE
— Spectrum handoff occurs when the primary users appear in the licensed band occupied by the secondary users. Spectrum handoff procedures aim to help the secondary users to vacat...
74
Voted
ICASSP
2010
IEEE
14 years 9 months ago
2010
IEEE
One of the key problems in cognitive radio (CR) is the detection of primary activity in order to determine which parts of the spectrum are available for opportunistic access. This...
87
Voted
PIMRC
2010
IEEE
14 years 7 months ago
2010
IEEE
This paper proposes the utilization of GSM logical channels (RACH, AGCH and TCH) and UMTS signaling (MIB and SIBs) of the Broadcast Channel to transmit a Cognitive Beacon Channel (...
73
Voted
ICC
2007
IEEE
15 years 4 months ago
2007
IEEE
— We consider opportunistic spectrum access (OSA) which allows secondary users to identify and exploit instantaneous spectrum opportunities resulting from the bursty traffic of ...