Communications Research Laboratory 1 Future Mobile Communications In The Networked Societies Shingo Ohmori Communications Research Laboratory August 8, 2002 Stanford University

Communications Research Laboratory 2 Contents Some Statistics of Internet and Mobile Communications Future Trends of Mobile Communications R&D for Future Mobile Communications Support of Social Activities by Wireless in Networked Society Conclusion

Communications Research Laboratory 3 Penetration Rates of Internet in the World As of March 2002 Cited from NUA (

Communications Research Laboratory 4 Internet Users in the World

Communications Research Laboratory 5 Required Years for Attaining the 10% Penetration Rates of the Major Telecommunication Media in Japan Investigated by “Survey of the Communication Usage Trend ” of MPT

Communications Research Laboratory 6 Penetration Rates of Mobile Phones in the world as of June 2000

Communications Research Laboratory 7 Numbers of Subscribers of Wired and Wireless phones in Japan

Communications Research Laboratory 8 Internet Mobile Phones - (internet phones/Mobile phones)- (as of )

Communications Research Laboratory 9 Penetration of Broadband Access

Communications Research Laboratory 10 Data Rates of Typical Media

Communications Research Laboratory 11 Tele-medicine Online-Government Cyber Theater Welfare Wireless Access Cellular HAPS Satellite ITS System Handover SkyNet System Handover Switch Base station New Generation Mobile Cyber Attack Broadband Backbone Networks Networked Society Social Activities In Networked Society -Bridging the Digital Divide- Online Commerce

Communications Research Laboratory 12 Multimedia Information Requirement Technologies Requirements for Networked Society Broadband Networks Anywhere, anytime Mobile Communications Security Data Encryption Barrier Free Human Interface

Communications Research Laboratory 13 Three Categories of Future Mobile Communications New Generation Mobile Communications – Broadband access (High data rate) – High mobility – Several systems coexist – Seamless connections to different systems Ad-hoc Wireless – Bluetooth – Ultra Wide Band Information Barrier Free – Wireless support for senior and handicapped people – Easy access to the Information for social activities

Communications Research Laboratory 14 Generations of mobile communications and their keywords and typical systems

Communications Research Laboratory 15 ITM-2000 The 3 rd generation mobile communication systems

Communications Research Laboratory 16 FOMA by DoCoMo -IMT-2000 with W-CDMA- Start: Coverage : about 70% of population (2002.3) Main services – High speed data:384 kbps – TV-phone : 64 kbps – Movies, News – i-mode

Communications Research Laboratory 17 Dark blue color indicates existing capabilities, medium blue color indicates enhancements to IMT-2000, and the lighter blue color indicates new capabilities of Systems Beyond IMT-2000 New Generation of Mobile Communication Systems - ITU-R WP8F : Illustration of Capabilities of IMT2000 and Systems Beyond -

Communications Research Laboratory 18 New Generation of Mobile Communications -New concept of system roaming among different systems-

Communications Research Laboratory 19 Why does high speed data transmission difficult in mobile environments? Broadband transmission is difficult – The higher the data rate, the wider the frequency band » Fading effect becomes large. » It needs more electric power. Large Small Information Transmission rate Frequency bandwidth

Communications Research Laboratory 20 Why does high speed data transmission difficult in mobile environments? Signal strength varies according to time and space. Signal strength becomes weak depending on propagation distance. Received power Transmitted power Antenna gain Large antenna→Big gain Reflection and scattering Fading