369 search results - page 26 / 74 » A Distributed Opportunistic Access Scheme for OFDMA Systems |
GLOBECOM
2007
IEEE
15 years 3 months ago
2007
IEEE
— Spectrum sensing is a key enabling functionality in cognitive radio (CR) networks, where the CRs act as secondary users that opportunistically access free frequency bands. Due ...
INFOCOM
2007
IEEE
15 years 3 months ago
2007
IEEE
— This paper presents a new cooperative storage system for sensor networks geared for disconnected operation (where sensor nodes do not have a connected path to a basestation). T...
WETICE
1997
IEEE
15 years 1 months ago
1997
IEEE
In this paper we want to share our experiences with implementing a scheme that enforces role based access control in a distributed, heterogeneous computing environment. This work ...
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CORR
2008
Springer
14 years 9 months ago
2008
Springer
We study the problem of dynamic spectrum sensing and access in cognitive radio systems as a partially observed Markov decision process (POMDP). A group of cognitive users cooperati...
CCGRID
2002
IEEE
15 years 2 months ago
2002
IEEE
More and more parallel applications are running in a distributed environment to take advantage of easily available and inexpensive commodity resources. For data intensive applicat...