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In cognitive radio networks (CRNs), the spectrum utilization can be dramatically improved with the secondary users (SUs) accessing the unoccupied licensed channels opportunistically. However, how to fully utilize the spectrum holes to meet the quality of service requirements of SUs is still an open issue. In this paper, we focus on multi-user, multi-channel case, and analyze the stable channel state...
Future networks are to deliver any-traffic, anytime, anywhere with full quality of service (QoS) guarantees. They will evolve from typical heterogeneous networks (HetNets) into dense, organic, and irregular heterogeneous networks called DenseNets. They will be complex and face additional challenges of heterogeneity in many design dimensions like different radio access technologies (RAT's) shrinking...
In this paper we study a wireless access network based on the WLAN technology and enriched with features such as caching and mesh networking. This system is analysed in terms of energy efficiency and traffic offloading, two objectives that are somewhat in contrast, but both relevant to network and service providers as they directly impact the operational cost. To this aim, we developed a mathematical...
In this paper opportunistic scheduling is studied for a wireless network with hybrid links that have different characteristics and quality of service (QoS) requirements. More specifically, we consider two types of links coexisting in a network: 1) secure links for critical messages demanding physical layer security; 2) regular links for other messages. Since the transmission rate of a secure link...
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