Special Section on Multi-dimensional Mobile Information Networks

Abstract

Wireless communication is truly indispensable for us in our daily life. It is reported that the number of subscribers of cellar phone in Japan is approaching 118 million as of the end of July this year, which corresponds to the penetration rate of 92%. With this situation, LTE (Long Term Evolution) system will be put into commercial use very soon to provide high speed signal transmission for ubiquitous multimedia services. Also we find R&D activities on 4th generation mobile communications. The major objective of wireless communication at the beginning is to obtain the wide coverage service area. After we successfully accomplished this, new systems with narrower coverage have been considered to provide attentive and attractive services to the end users. Furthermore, such new concepts as harmonization of communication and broadcast, medical ICT (Information and Communication Technology) have been brought up to provide useful, safe and secure systems. In relation to these matters, research on multi-dimensional mobile information networks is highly required. Out of 15 submissions, the editorial committee has accepted three full papers and one letter for publication after carefully reviewed. Though the number of accepted papers is smaller than we expected, we believe we have high quality papers. The papers cover the topical areas such as transmission quality of UWB (Ultra Wide Band) system, PWM (Pulse Width Modulation) transmitter performance, power saving sensor network terminal, and topology control algorithm on ZigBee network. Finally on behalf of special section editorial committee members I would like to extend sincere appreciation to all of the authors and reviewers who contributed to this section. Also I would like to thank all editorial committee staff members for their voluntary activities throughout the editorial process.