Contents Telektronikk Feature: Broadband Radio Access Volume 96 No. 1 – 2000 ISSN 0085-7130 1 Guest editorial; Editor: Terje Tjelta Ola Espvik Tel: (+47) 63 84 88 83 2 Broadband radio access for multimedia services; e-mail:
[email protected] Terje Tjelta, Agne Nordbotten and Harald Loktu Status section editor: Per Hjalmar Lehne 11 The development of an open interactive multimedia services delivery plat- Tel: (+47) 63 84 88 26 form in Europe; Leon van Noorden e-mail:
[email protected] 17 Towards the next generation LMDS systems architecture; John R. Norbury Editorial assistant: Gunhild Luke Tel: (+47) 63 84 86 52 28 An interactive return link system for LMDS; e-mail:
[email protected] Otto Koudelka, Vjekoslav Matic, Michael Schmidt and Rupert Temel Editorial office: 36 Cellular radio access for broadband services: propagation results at 42 GHz; Telenor AS, Telenor R&D Kenneth H. Craig and Terje Tjelta PO Box 83 N-2027 Kjeller Norway 45 Virtual classroom using interacive broadband radio access at 40 GHz; Tel: (+47) 63 84 84 00 Filomena Papa, Sandra Spedaletti, Stefano Teodori and Vittorio del Duce Fax: (+47) 63 81 00 76 e-mail:
[email protected] 54 Techno-economics of broadband radio access; Markku Lähteenoja and Leif Aarthun Ims Editorial board: Ole P. Håkonsen, 68 User reactions to interactive broadband services; Senior Executive Vice President. Oddvar Hesjedal, Rich Ling and Siri Nilsen Vice President, R&D. Bjørn Løken, 82 Interactive broadband services over satellite; Director. Petter Brodal Graphic design: Design Consult AS, Oslo Status Layout and illustrations: Gunhild Luke, Britt Kjus, Åse Aardal 93 Introduction; (Telenor R&D) Per Hjalmar Lehne Prepress: ReclameService as, Oslo 94 MExE and WAP overview; Erik Aslaksen Printing: Optimal as, Oslo 102 Overview of UMTS security for Release 99; Circulation: Geir Køien 4,000 Guest editorial Broadband services have been around since the Assume that a 1 GHz bandwidth is available per TV set was invented and broadcasting of moving basic radio cell.