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Using partial observable Markov decision process(POMDP) and game theoretic solutions, we investigate the problem of achieving global optimization for distributed channel selections in cognitive radio networks (CRNs). In order to fully utilize the scarce spectrum resources, we propose two special cases to study the dynamic spectrum access. Firstly, the channel state prediction based on POMDP could...
Due to the attractive characteristics of high capacity, high-speed, wide coverage and low transmission power, Wireless Mesh Networks become the ideal choice for the next-generation wireless communication systems. However, the network congestion of WMNs deteriorates the quality of service provided to end users. Game theory optimization model is a novel modeling tool for the study of multiple entities...
Software as a Service (SaaS) provides a useful and convenient way for cloud users to enjoy cloud service, but security problems have caused great influence on the development and popularization of SaaS. As a commercial model, SaaS involves different roles of participants who could be dishonest and malicious. This paper presents a security protocol to address several security issues in SaaS and protect...
Wireless sensor networks have great potential to be employed in various real time fields, such as, military, industry and traffic surveillance, etc. However, due to power and memory limitations of sensor nodes, one of the major challenges about wireless sensor networks is security. Based on evolutionary game theory, the paper proposes an active defense model for wireless sensor networks where nodes...
The resource utility and network throughput are both the key challenges in wireless multi-hop network. In this paper, by introducing the idea of cross-layer design and its cooperative mechanism, a multi-constrained optimization scheme is proposed. The proposed scheme combines the energy threshold in the physical layer and the channel capacity in the link layer and integrates the advantage of tight...
The notion of Divisible Online/Offline Signature (DOS) was recently introduced by Gao et al. in CT-RSA 2009. In a DOS system, the idea is to perform the signing process in two phases. The first phase outputs offline tokens before the arrival of a message to be signed, where the offline tokens are regarded as a part of full signature, and the second phase is performed very efficiently after knowing...
This paper analyzed the basic model for the e-payment industry with the agent under the guidance of Two-sided Market, and introduced the 2-stage game of adoption strategies for both the Platform and the Buyer. Then the authors made a deep through case study for three dimensions: speed improving, convenience improving and safety improving, mainly based on the functions of the agents in e-payment application...
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