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Paper Abstract and Keywords
Presentation 2007-11-02 11:10
New ICO, A Proposal for CDMA Mobile Satellite System -- An Integration of Cellular, Satellite Communication and Positioning services --
Osamu Ichiyoshi SAT2007-42
Abstract (in Japanese) (See Japanese page) 
(in English) The ICO system was designed to provide global mobile communications with hand-held terminals. The system had a high degree of compatibility with GSM to provide dual cellular and satellite modes mobile services for the users. Unfortunately the project was scrapped in 2000 because the rapid growth of the cellular systems was expected to take most of the intended market. Today, the cellular systems have grown so much that the market is already saturated in many countries. The growth of the cellular market was made possible by adoption of small cells, which enabled the miniaturization of user terminals and higher frequency reuses at the cost of more complex communication controls. Thus further expansion of the services areas to sparsely populated but vast regions is very difficult with the conventional technology.
It seems to the author that the ICO system has a new market potential to further expand the coverage areas and the services for mobile communication. The New ICO, herein proposed has a few features; (1) The CDMA scheme extremely simplifies the communication controls compared with TDMA/FDMA adopted in the Old ICO, (2) The 10 satellites ICO system can enhance the GPS readily by broadcasting a GPS compatible signal for each beam, (3) Dual cellular and satellite mobile system is easily realized for the next generation cellular systems. Another important feature of the proposed system is that most of the system design, Satellite Access Nodes (SAN) earth stations and satellites designs can be reused so the development cost and time can be significantly reduced.
The New ICO system can make effective use of the Old ICO, the cellular and GPS technologies to realize a universal mobile communications services for the 21st century.
Keyword (in Japanese) (See Japanese page) 
(in English) ICO; Intermediate Circular Orbit / CDMA ; Code Division Multiple Access / SAN; Satellite Access Node / / / / /  
Reference Info. IEICE Tech. Rep., vol. 107, no. 299, SAT2007-42, pp. 139-144, Nov. 2007.
Paper # SAT2007-42 
Date of Issue 2007-10-25 (SAT) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF SAT2007-42

Conference Information
Committee SAT  
Conference Date 2007-11-01 - 2007-11-02 
Place (in Japanese) (See Japanese page) 
Place (in English) Okinawaken-Seinen-Kaikan 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Satellite Communication Technology, etc. (JC-SAT2007) 
Paper Information
Registration To SAT 
Conference Code 2007-11-SAT 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) New ICO, A Proposal for CDMA Mobile Satellite System 
Sub Title (in English) An Integration of Cellular, Satellite Communication and Positioning services 
Keyword(1) ICO; Intermediate Circular Orbit  
Keyword(2) CDMA ; Code Division Multiple Access  
Keyword(3) SAN; Satellite Access Node  
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1st Author's Name Osamu Ichiyoshi  
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Speaker Author-1 
Date Time 2007-11-02 11:10:00 
Presentation Time 20 minutes 
Registration for SAT 
Paper # SAT2007-42 
Volume (vol) vol.107 
Number (no) no.299 
Page pp.139-144 
#Pages 6 
Date of Issue 2007-10-25 (SAT) 

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