This paper presents the pillars for an end-to-end QoS framework in IST-AROMA project. This includes a QoS architecture framework encompassing common radio resource management (CRRM) for the heterogeneous radio access network part and enabling QoS coordination with QoS-enabled IP-based segments, either serving as transport option within the 3GPP R6 Radio Access Network (RAN) or as main building ...

Cognitive Radio (CR) is a promising technique to address the spectrum scarcity issue by enabling the unlicensed network users (SUs) to dynamic access the spectrum holes. This thesis designs Medium Access Control (MAC) protocols for SUs to utilize the unused spectrum without interfering the licensed network users’ (PUs) transmissions; analyzes the MAC performance based on the queuing theories; a...

Cloud radio access network (CRAN) has been shown as an effective means to boost performance. Such gain stems from the intelligent management of remote heads (RRHs) in terms on/off operation mode and power consumption. Most conventional resource allocation (RA) methods, however, optimize utility without considering switching overhead RRHs adjacent time intervals. When environment becomes time-co...

In heterogeneous networks, multi-radio access technologies (RATs) can coexist for a variety of traffic demands and it is called multi-RAT network. Also, cognitive radio enable to use white space of frequency band, and thus spectrum resources can be dynamically allocated. This paper analyzes an effect of multi-radio access (MRA) users, who simultaneously exploit multi-RATs, on network performanc...

Radio resource management (RRM) is the system level control of co-channel interference and other radio transmission characteristics in wireless communication systems. In this paper we first analyze a utility function based access selection (UFAS) method. Then we investigate a radio resource management and network selection scheme in heterogeneous wireless network. We propose an economic model t...

Vehicle-to-vehicle radio links suffer from power variations, multipath fading and associated Doppler spreading in frequency, as well as interference form other vehicles. These effects are investigated in the context of an Automated Vehicle Control Systems (AVCS) employing vehicle platoons. A statistical model for the channel is considered and the performance of the network involving many links ...

To combat the increasing significance of deployment and configuration costs, the concept of a self-deploying, self-configuring radio access network is discussed. It is proposed that the basic sciences of complex systems (cellular automata, game theory, ecology modeling) can be exploited to design algorithms for such a system. An example, taken from the field of cellular automata, is presented f...

The objective of this thesis document is to contribute into the set of techniques for energy efficiency in mobile networks, the often so-called Green Radio mechanisms. The work has been done taking as reference framework the current and future trends in mobile and cellular technologies as 3G/W-CDMA, LTE and LTE-Advanced. This has permitted us to classify these methods in a coherent classificati...

Recent advances in Software Defined Radio (SDR), wide band spectrum sensing, and environment aware real-time spectrum allocation [13, 10, 4] show promise of enabling the new paradigm of Dynamic Spectrum Access (DSA) networks. These networks aim to provide dynamic access to large swaths of spectrum which is currently statically partitioned and underutilized. Majority of research in this area has...

Optical/wireless convergence has become of particular interest recently because a combined radio wireless and optical wired network has the potential to provide both mobility and high bandwidth in an efficient way. Recent developments of new radio access technologies such as the Long Term Evolution (LTE) and introduction of femtocell base stations open new perspectives in providing broadband se...