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Publications

Publications by Vânia Guiomar Gonçalves

2014

Coordinating standardization in dynamic spectrum access

Authors
Delaere, S; Goncalves, V; Marques, P;

Publication
2014 IEEE Globecom Workshops, GC Wkshps 2014

Abstract
This paper investigates the gap between research into Dynamic Spectrum Access (DSA), and the standardization of these technologies, as well as ways in which coordination of standardization activities between EU funded research projects might help bridge this gap. Concretely, it first discusses the current state of standardization in CR and DSA, as well as the need for a coordinated approach to DSA standardization among European projects. It subsequently provides a short overview of the DSA and CR research landscape in Europe and briefly describes the objectives of the Cognitive Radio Standardization Initiative (CRS-i). The following sections on the paper then focus on a survey which was conducted among the 26 currently funded, Radio Access and Spectrum related EU projects, with specific analysis also performed for the CR and DSA related sub-cluster of projects. This survey provides insight into projects' current standardization activities and collaboration methods, as well as opportunities and bottlenecks for collaboration in standardization. The paper concludes that the coordination of standardization efforts, as well as specific instruments to enable the standardization of research results beyond the project lifetime, are desirable if Europe is to play a role in the global standardization of CR and DSA. Based on the survey and on close interactions with RAS cluster projects, the paper finally proposes a number of concrete coordination trajectories. © 2014 IEEE.

2015

Business Benefits of Licensed Shared Access (LSA) for Key Stakeholders

Authors
Matinmikko, M; Okkonen, H; Yrjölä, S; Ahokangas, P; Mustonen, M; Palola, M; Gonçalves, V; Kivimäki, A; Luttinen, E; Kemppainen, J;

Publication
The Practical Reality - Opportunistic Spectrum Sharing and White Space Access

Abstract

2014

Economic Aspects of CR Policy and Regulation

Authors
Nolan, K; Gonçalves, V;

Publication
Signals and Communication Technology - Cognitive Radio Policy and Regulation

Abstract

2014

Defining 'co-primary spectrum sharing' - A new business opportunity for MNOs?

Authors
Ahokangas, P; Horneman, K; Posti, H; Matinmikko, M; Hänninen, T; Yrjölä, S; Gonçalves, V;

Publication
Proceedings of the 2014 9th International Conference on Cognitive Radio Oriented Wireless Networks and Communications, CROWNCOM 2014

Abstract
This paper seeks to identify and discuss mobile network operators' (MNOs) business opportunities in spectrum sharing where the several MNOs would share the same spectrum band. This sharing model, here called co-primary spectrum sharing (CoPSS), aims to increase the efficiency of spectrum use by introducing licensed sharing between MNOs in new bands where two or more MNOs would get the license to operate on a shared basis, instead of separate exclusive licenses for different MNOs or unlicensed sharing. The paper starts with a discussion concerning the domains needed for defining CoPSS: a) type of spectrum authorized for sharing, b) temporal, spatial, and spectral dimensions of shared resources, c) degree of information shared, and presents a definition of CoPSS. Regarding CoPSS business opportunities for MNOs we present CoPSS enabling and limiting factors and CoPSS related challenges within a framework of value co-creation, co-capture, and co-opetition. The paper concludes with a variety of alternative ways of doing business with CoPSS. © 2014 ICST.

2014

Modelling operational expenditure savings for the implementation of autonomous networks

Authors
Spek, S; Gonçalves, V; Rits, O; Altman, Z; Destré, C;

Publication
IEEE Wireless Communications and Networking Conference, WCNC

Abstract
Developments in autonomic network management offer many promises, but its economic benefits are hard to assess. This paper proposes a method to calculate the OPEX gains of a typical network on the basis of a scenario, for which a management framework and autonomous mechanisms have been developed. It makes use of a novel approach, a Toy model, taking into account expert opinions as well as simulation results. The new approach allows assessment of the OPEX impact of both individual mechanisms as well as the overall impact, which, in the present scenario results in an expected OPEX saving of 11 to 13 per cent. © 2014 IEEE.

2012

COGNITIVE RADIO FOR MEDICAL BODY AREA NETWORKS USING ULTRA WIDEBAND

Authors
Chavez Santiago, R; Nolan, KE; Holland, O; De Nardis, L; Ferro, JM; Barroca, N; Borges, LM; Velez, FJ; Goncalves, V; Balasingham, I;

Publication
IEEE WIRELESS COMMUNICATIONS

Abstract
Wearable wireless medical sensors beneficially impact the healthcare sector, and this market is experiencing rapid growth. In the United States alone, the telecommunications services market for the healthcare sector is forecast to increase from $7.5 billion in 2008 to $11.3 billion in 2013. Medical body area networks improve the mobility of patients and medical personnel during surgery, accelerate the patients' recovery, and facilitate the remote monitoring of patients suffering from chronic diseases. Currently, MBANs are being introduced in unlicensed frequency bands, where the risk of mutual interference with other electronic devices can be high. Techniques developed during the evolution of cognitive radio can potentially alleviate these problems in medical communication environments. In addition, these techniques can help increase the efficiency of spectrum usage to accommodate the rapidly growing demand for wireless MBAN solutions and enhance coexistence with other collocated wireless systems. This article proposes a viable architecture of an MBAN with practical CR features based on ultra wideband radio technology. UWB signals offer many advantages to MBANs, and some features of this technology can be exploited for effective implementation of CR. We discuss the physical and MAC layer aspects of the proposal in addition to the implementation challenges.

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