The Future Generations of Mobile Communications Based on Broadband Access Methods

Authors:
Shingo Ohmori;Yasushi Yamao;Nobuo Nakajima
Affiliations:
Communications Research Laboratory, Ministry of Posts and Telecommunications, 184-8795 Koganei, Tokyo, Japan E-mail: shingo@crl.go.jp;Wireless Laboratories, NTT Mobile Communications Network, Inc. E-mail: yamao@mlab.yrp.nttdocomo.co.jp;Wireless Laboratories, NTT Mobile Communications Network, Inc. E-mail: nakajima@mlab.yrp.nttdocomo.co.jp
Venue:
Wireless Personal Communications: An International Journal
Year:
2001

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Abstract

The forthcoming mobile communication systems are expected to provide much variety of services from high quality voice to high definition videos through high data rate wireless channels at anywhere in the world. High data rate requires broad frequency bands, and sufficient broadband can be achieved in higher frequency bands such as microwave, Ka-band and millimeter-wave. Broadband wireless channels have to be connected to broadband fixed networks such as the Internet and local area networks. The future generation systems will include not only cellular phones, but also many new types of communication systems such as broadband wireless access systems, millimeter-wave LAN, intelligent transport systems (ITS) and high altitude stratospheric platform station (HAPS) systems. The key words in the future generations of mobile communications are ``multimedia communications'', ``wireless access to broadband fixed networks'' and ``seamless roaming among different systems''. This article discusses the future generations mobile communication systems.