TY - GEN
T1 - Efficient random access control scheme with reservation channel for QZSS short message SS-CDMA communication
AU - Ohya, Kei
AU - Takahashi, Tomohide
AU - Kameda, Suguru
AU - Oguma, Hiroshi
AU - Taira, Akinori
AU - Suematsu, Noriharu
AU - Takagi, Tadashi
AU - Tsubouchl, Kazuo
N1 - Publisher Copyright:
© 2016 IEEE.
PY - 2016/9/12
Y1 - 2016/9/12
N2 - Quasi-Zenith Satellite System (QZSS) is expected to provide a high accurate positioning service and allows two-way communication which includes the terminal location and short messages. For QZSS short message spread-spectrum code-division multiple access (SS-CDMA) communication, Flag Method was proposed as access control scheme. It is always able to communicate in optimum state which channel efficiency of 36.8 % is best. However, the channel efficiency is low even in optimum state. In this paper, we propose reservation channel (R-Ch) as an access control scheme which improves the upper limit of channel efficiency. In R-Ch, collision due to random channel selection is suppressed by selecting channels in multiple steps, and the channel efficiency is improved up to 84.0 %. Time performances of accommodating 3 million mobile terminals when using Flag Method only and Flag Method with R-Ch are shown. Flag Method with R-Ch can reduce the time by half compared with Flag Method only.
AB - Quasi-Zenith Satellite System (QZSS) is expected to provide a high accurate positioning service and allows two-way communication which includes the terminal location and short messages. For QZSS short message spread-spectrum code-division multiple access (SS-CDMA) communication, Flag Method was proposed as access control scheme. It is always able to communicate in optimum state which channel efficiency of 36.8 % is best. However, the channel efficiency is low even in optimum state. In this paper, we propose reservation channel (R-Ch) as an access control scheme which improves the upper limit of channel efficiency. In R-Ch, collision due to random channel selection is suppressed by selecting channels in multiple steps, and the channel efficiency is improved up to 84.0 %. Time performances of accommodating 3 million mobile terminals when using Flag Method only and Flag Method with R-Ch are shown. Flag Method with R-Ch can reduce the time by half compared with Flag Method only.
KW - 1-bit flag
KW - Flag Method
KW - Frame Slotted ALOHA
KW - Global Positioning System (GPS)
KW - Quasi-Zenith Satellite System (QZSS)
KW - access control
UR - http://www.scopus.com/inward/record.url?scp=84989819774&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84989819774&partnerID=8YFLogxK
U2 - 10.1109/WCNC.2016.7565147
DO - 10.1109/WCNC.2016.7565147
M3 - Conference contribution
AN - SCOPUS:84989819774
T3 - IEEE Wireless Communications and Networking Conference, WCNC
BT - 2016 IEEE Wireless Communications and Networking Conference, WCNC 2016
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2016 IEEE Wireless Communications and Networking Conference, WCNC 2016
Y2 - 3 April 2016 through 7 April 2016
ER -