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The current trend for opportunistic use of the licensed or licensed-exempt wireless spectrum with limited rules, or even without rules, introduces significant scientific and technical challenges for the networks of the future. Until now, for the realization of the cognitive radio paradigm, several spectrum sharing schemes have been proposed, such as centralized and distributed schemes, and cooperative...
In this paper, we present a three-layer flexible architecture which intends to help developers and end users to take advantage of the full potential that modern sensor networks can offer. The proposed architecture deals with issues regarding data aggregation, data enrichment and finally, data management and querying using semantic Web techniques. Semantics are used in order to extract meaningful information...
Wireless community networks (WCNs) are wide-area wireless networks whose nodes are owned and managed by volunteers. These networks are rarely supported by any infrastructure for measuring network performance indicators. In this paper, we present the design, the implementation and the experimental evaluation of KIXEM, an open agent-based architecture, whose design meets the special requirements and...
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