TY - GEN
T1 - Large-capacity QZSS location and short message system using frame Slotted ALOHA with flag method
AU - Takahashi, Tomohide
AU - Miyake, Yuji
AU - Yamagata, Fumihiro
AU - Oguma, Hiroshi
AU - Kameda, Suguru
AU - Suematsu, Noriharu
AU - Takagi, Tadashi
AU - Tsubouchi, Kazuo
PY - 2013
Y1 - 2013
N2 - 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.
AB - 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.
KW - 1-bit flag
KW - Access control
KW - Flag Method
KW - Frame Slotted ALOHA
KW - Global Positioning System (GPS)
KW - Quasi-Zenith Satellite System (QZSS)
UR - http://www.scopus.com/inward/record.url?scp=84893339124&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84893339124&partnerID=8YFLogxK
U2 - 10.1109/PIMRC.2013.6666713
DO - 10.1109/PIMRC.2013.6666713
M3 - Conference contribution
AN - SCOPUS:84893339124
SN - 9781467362351
T3 - IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC
SP - 3280
EP - 3285
BT - 2013 IEEE 24th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications, PIMRC 2013
T2 - 2013 IEEE 24th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications, PIMRC 2013
Y2 - 8 September 2013 through 11 September 2013
ER -