How to develop the next generation wireless networks
35 researchers from 13 countries have written a textbook they hope will help developing next generation wireless networks. Andrés Alayón Glazunov at KTH is one of the editors.
“With billions of connected devices crammed into our current wireless systems, the volume of wireless data transmitted over the air is exploding, resulting in exhaustion of radio resources. In this book we are addressing fundamental topics indispensable to resolve the imminent lack of radio spectrum. Channel modeling, antennas and propagation are at the core of the solutions,” says Alayón Glazunov, post-doc at Electromagnetic Engineering.
How will this lack of radio spectrum best be tackled but by making the systems more efficient. On one hand, this is achieved by evaluating system performance – before investing in a new system. On the other hand, in order to develop new, better systems technologies must face up to the performance demands in spectrum in more energy efficient ways.
“Analyzing a system before it’s implemented is vital to saving costs and time spent on research. Allowing for these types of analysis reduces the cost of developing a complex system in so far that it cuts down on the hardware that has to be developed to evaluate performance,” says Alayón Glazunov
In order to evaluate the performance of any wireless system it is important to first understand the characteristics of the radio channel. It includes both the physical propagation channel, in which the radio waves – signals – are transmitted, as well as the antennas transmitting and sensing these signals. The propagation channel – the behavior of radio waves when transmitted or propagated - in a building for example depends on the placement of walls, windows, the structure of the ceiling, furniture, etc. and the electric properties of building materials. Hence, accurate channel models that integrate both the components, channels and environment are necessary for a proper system design.
The textbook LTE- A and Next Generation Wireless Networks: Channel Modeling and Propagation describes the recent advances in propagation and channel modeling, necessary for designing, simulating and validating next generation wireless systems.
Two fundamental shifts in the way researchers approach these problems are underway, Alayón Glazunov explains, which is what the 35 researchers from 21 institutions in 13 countries are attempting to address in the book.
Firstly, the strict reservation of a specific frequency band for a unique standard or service could evolve toward a dynamic priority policy allowing the co-existence with users from a secondary system in a band allocated to a primary system. Here, the so-called multi-user MIMO (Multiple Input Multiple Output) is a key technology.
Secondly, a huge increase of the number of cells is expected by combining outdoor base stations with small cells and relays. This evolution is becoming a reality and requires the development of self-organization capabilities and distributed cooperative approach to wireless networks.
The book is divided into three parts…:
- Part I addresses the fundamentals (e.g. technologies, channel modeling principles etc.)
- Part II addresses propagation and modeling discussing topics such as indoor propagation, outdoor propagation, etc.
- Part III explores system performance and applications (e.g. MIMO Over-the-air testing of antennas, statistical characterization of antennas in BANs, etc).
- introduces LTE-Advanced and emerging wireless networks and concepts, as well as the major new techniques which impact the channel/propagation.
- discusses models for pathloss predictions, pico/femto and relay channels, wideband channel models, channels for high mobility, etc.
- presents advances in channel measurements, and compare LTE field trials and measurement results with theoretical models.
- covers application and performance analysis.
People with a wide variety of backgrounds could benefit from and enjoy reading the book, says Alayón Glazunov: this book is an excellent resource for academics and researchers working in telecommunications, and for wireless network designers, scientific (R&D) staff, and network engineers of mobile operators. Engineering students with wireless technology features in their work, product and solution architects, network planners, consultants on wireless communications, small cell hardware manufacturers will also find the book of interest,” says .
Guillaume de la Roche (Editor), Mindspeed Technologies, France
Andrés Alayón Glazunov (Editor), KTH - Royal Institute of Technology, Sweden
Ben Allen (Editor), University of Bedfordshire, UK
Laura Bernadó, Forschungszentrum Telekommunikation Wien, Austria
Tim Brown, University of Surrey, UK
Jorge Cabrejas, Universitàt Politècna deValència, Spain
Narcis Cardona, Universitàt Politècna deValència, Spain
Luis M. Correia, IST/IT-Technical University of Lisbon, Portugal
Nicolai Czink, Forschungszentrum Telekommunikation Wien, Austria
David Edward,University of Oxford, UK
Rob Edwards, Loughborough University, UK
Jan Ellenbeck, Technische Universität München, Germany
Katsuyuki Haneda, Aalto University, Finland
Petros Karadimas, University of Bedfordshire, UK
Muhammad Irfan Khattak, NWFP University of Technology and Technology, Pakistan
Veli-Matti Kolmonen, Aalto University, Finland
Thomas Kürner, Technische Universität Braunschweig, Germany
Zhihua Lai,Ranplan Wireless Network Design Ltd, UK
Tommi Laitinen, Aalto University, Finland
Guangyi Liu,China Mobile, China
Yves Lostanlen,University of Toronto, Canada
Lei Ma, Loughborough University, UK
Christoph Mecklenbräuker, Vienna University of Technology, Austria
Andreas F. Molisch,University of Southern California, USA
Jose F. Monserrat, Universitàt Politècna deValència, Spain
Michal Mackowiak, IST/IT-Technical University of Lisbon, Portugal
Carla Oliveira, IST/IT-Technical University of Lisbon, Portugal
Alexander Paier, Vienna University of Technology, Austria
Ghazanfar A. Safdar, University of Bedfordshire, UK
Vit Sipal, University of Oxford, UK
Fredrik Tufvesson, Lund University, Sweden
Julian Webber, Hokkaido University, Japan
Thomas Zemen, Forschungszentrum Telekommunikation Wien, Austria
Jianhua Zhang, Beijing University of Posts and Telecommunications, China
Jie Zhang, University of Sheffield, UK
Text and photo: Marie Androv