Adaptive Wireless Transmission Scheme Considering Stay Time in Spot Mobile Access

Yuki MINODA  Katsutoshi TSUKAMOTO  Shozo KOMAKI  

IEICE TRANSACTIONS on Communications   Vol.E87-B    No.5    pp.1235-1241
Publication Date: 2004/05/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Mobile Multimedia Communications)
Category: Wireless LAN
adaptive transmission,  wireless communications,  radio resource management,  spot access system,  radio agent,  

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In this paper, an adaptive transmission scheme considering the stay time in a spot mobile access system is proposed. The proposed adaptive transmission scheme selects the modulation format according to the user's stay time in the spot communication zone and the types of data requested by each user. In the proposed system, when the stay time of a user is short, high-speed modulation is selected for this user. When the stay time of a user is long, a more reliable modulation format is selected. The computer simulation results show that the proposed transmission scheme without any channel estimation can achieve the same or better performance than when using the modulation format fixedly when the carrier-to-noise ratio changes rapidly.