Proposal and performance evaluation of wireless AO/DS system employing PHS

Hiroyuki Shiba, Kazuhiro Uehara, Shuji Kubota

Research output: Contribution to journalArticlepeer-review


The Always On/Dynamic ISDN (AO/DI) system adaptively switches between packet switching and circuit switching in response to the traffic volume. In this paper, we propose a wireless AO/DI system based on the Personal Handyphone System (PHS), present an overview of this system, and perform an evaluation by a computer simulation of the channel occupation ratio and the call loss ratio of the system. The traffic model assumes an application such as WWW or electronic mail, and the performance is evaluated. The results show the effectiveness of the wireless AO/DI technology as the subscriber capacity of the entire system increases. Furthermore, the middleware for the wireless AO/DI and the terminal adapter for the wireless AO/DI are tested. The performance evaluation results of actual equipment are presented.

Original languageEnglish
Pages (from-to)10-19
Number of pages10
JournalElectronics and Communications in Japan, Part I: Communications (English translation of Denshi Tsushin Gakkai Ronbunshi)
Issue number5
Publication statusPublished - May 2005
Externally publishedYes


  • AO/DI
  • Circuit switching
  • PHS
  • Packet switching
  • WWW

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering


Dive into the research topics of 'Proposal and performance evaluation of wireless AO/DS system employing PHS'. Together they form a unique fingerprint.

Cite this