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With the promotion of people's demand on information security, access authentication gets more and more attention nowadays. However, most of the traditional access authentication schemes, such as 802.1X, Web authentication, etc., have a great deal of limitations and disadvantages in security and mobility. They can't meet increasing challenges especially from wireless authentication. In this paper,...
Being the first work for decentralized task allocation with a negotiation process involving a mutual selection, contract net protocol (CNP) has been widely applied to kinds of multi-agent system (MAS). To solve the problem of flexible and dynamic system integration, agent techniques is introduced. On the basis of researches on CNP, an implementation of contract net protocol based on information intermediary...
In this paper, we propose an efficient power allocation scheme that aims at maximizing the system throughput in joint spectrum overlay and underlay cognitive radio network. We show that our proposed scheme enlarges the achievable throughput region comparing to the overlay strategy, and causes less interference than the underlay strategy. In addition, since the unlicensed users adopting the overlay...
In this paper, we investigate the optimal power allocation strategy in the joint spectrum overlay and underlay cognitive radio network where a licensee and multiple unlicensed users coexist and operate in the same spectrum. We propose an optimal power allocation scheme which achieves the maximum system utility while satisfying the QoS requirement of SUs and interference constrains of the PU. Particularly,...
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