295 search results - page 12 / 59 » Dynamic Access Control for Multi-privileged Group Communicat... |
CDC
2008
IEEE
14 years 3 months ago
2008
IEEE
—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 cooper...
ICNP
2009
IEEE
14 years 3 months ago
2009
IEEE
—Accurate sensing of the spectrum condition is of crucial importance to the mitigation of the spectrum scarcity problem in dynamic spectrum access (DSA) networks. Specifically, ...
CDC
2009
IEEE
14 years 1 months ago
2009
IEEE
We consider a class of restless multi-armed bandit problems that arises in multi-channel opportunistic communications, where channels are modeled as independent and stochastically...
ICC
2007
IEEE
14 years 3 months ago
2007
IEEE
—In this paper, the IEEE 802.16 protocol is investigated with respect to the bandwidth provision problem arising at the Medium Access Control (MAC) layer. The aim is to optimally...
OZCHI
2006
ACM
14 years 2 months ago
2006
ACM
There are various situations where a distinction needs to be made between group members and outsiders. For example, to protect students in chat groups from unpleasant incidents ca...