Large-capacity QZSS location and short message system using frame Slotted ALOHA with flag method

Tomohide Takahashi, Yuji Miyake, Fumihiro Yamagata, Hiroshi Oguma, Suguru Kameda, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Citations (Scopus)

Abstract

For large scale disaster relief, we propose a location and short message system using the Quasi-Zenith Satellite System (QZSS). The target capacity of the proposed system is the transmission of 3 million message data (MD) or more within one hour. To control random access of mobile terminal (MT), Frame Slotted ALOHA is used. Frame Slotted ALOHA cannot provide optimum control, since the hub station (HUB) does not know the number of MTs. For realizing large capacity, we propose Frame Slotted ALOHA with Flag Method in which the HUB can estimate the number of MT quickly. The proposed Flag Method is divided into two modes. The send flag mode can estimate the number of MT within a short time. The send message data mode can control random packet access using estimated number of MD in send flag mode. Computer simulation shows that it is possible to accommodate 3 million MD by using the proposed Flag Method within 48m 19s.

Original languageEnglish
Title of host publication2013 IEEE 24th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications, PIMRC 2013
Pages3280-3285
Number of pages6
DOIs
Publication statusPublished - 2013
Event2013 IEEE 24th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications, PIMRC 2013 - London, United Kingdom
Duration: 2013 Sep 82013 Sep 11

Publication series

NameIEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC

Other

Other2013 IEEE 24th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications, PIMRC 2013
CountryUnited Kingdom
CityLondon
Period13/9/813/9/11

Keywords

  • 1-bit flag
  • Access control
  • Flag Method
  • Frame Slotted ALOHA
  • Global Positioning System (GPS)
  • Quasi-Zenith Satellite System (QZSS)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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