Foreword by Dr. Ulf Nilsson
Dr. Ulf Nilsson
Telia Sonera R&D, Mobility Core and Connectivity
The history of modern mobile telephony, which is about 30 years by now, has certainly been fascinating. The first analogue systems deployed in the early 1980s followed by GSM in the early 1990s provided users a basic voice service with mobility support. The addition of GPRS subsequently introduced support for packet-oriented mobile services. After about another 10 years or so, the third generation mobile system UMTS appeared with better capacity and higher throughput for packet services. For a long time, however, voice services dominated the operators' service offerings and the mobile network traffic. But just as the Internet changed the nature ...
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