Acknowledgements
The editors would like to acknowledge the hard work of the contributors from Nokia Siemens Networks: Mieszko Chmiel, Amitava Ghosh, Kari Hooli, Pasi Kinnunen, Troels Kolding, Jari Lindholm, Timo Lunttila, Patrick Marsch, Klaus Pedersen, Bernhard Raaf, Rapeepat Ratasuk, Karri Ranta-aho, Simone Redana, Claudio Rosa, Cinzia Sartori, Peter Skov, Jun Tan, Hua Wang, Xiaoyi Wang and Yuyu Yan.
We also would like to thank the following colleagues for their valuable comments: Ömer Bulakci, Lars Dalsgaard, Matthias Hesse, Krzysztof Kordybach, Peter Merz, Sari Nielsen, Sabine Rössel and Hanns Jürgen Schwarzbauer.
The editors appreciate the fast and smooth editing process provided by the publisher, John Wiley & Sons, Ltd and especially Mariam Cheok, Richard Davies, Sandra Grayson and Mark Hammond.
We are grateful to our families, as well as the families of all the authors, for their patience during the late night and weekend editing sessions.
The editors and authors welcome any comments and suggestions for improvements or changes that could be implemented in forthcoming editions of this book. The feedback is welcome to editors' e-mail addresses harri.holma@nsn.com and antti.toskala@nsn.com.
