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In this article we propose to facilitate local peer-to-peer communication by a Device-to-Device (D2D) radio that operates as an underlay network to an IMT-Advanced cellular network. It is expected that local services may utilize mobile peer-to-peer communication instead of central server based communication for rich mul-timedia services. The main challenge(More)
Heterogeneous Network (HetNet) deployments are one of the key enablers in providing ubiquitous coverage and capacity enhancements for LTE-Advanced networks. They play an important role in achieving high data rate and Quality of Service requirements defined for next generation wireless networks. In this paper we evaluate various cell discovery techniques(More)
Short-range wireless systems have recently gained a lot of attention to provide seamless, multimedia communications around a user-centric concept in so called wireless personal area networks (WPAN). Ultra-wideband (UWB) technology presents itself as a good candidate for the physical layer (PHY) of WPAN, both for high and low data rate applications. Although(More)
The demand for spectrum is growing rapidly as data intensive mobile communications and high-definition television are getting more popular. The spectrum regulators are preparing for flexible spectrum use and the implementation of new technologies. To make the appropriate decisions, the regulators need to identify and evaluate the different alternatives. In(More)
In heterogeneous cellular scenarios with macrocells, femtocells or picocells users may suffer from significant co-channel cross-tier interference. To manage this interference 3GPP introduced almost blank subframe (ABSF), a subframe in which the interferer tier is not allowed to transmit data. Vulnerable users thus get a chance to be scheduled in ABSFs with(More)