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| Paper Abstract and Keywords | ||
| Presentation | 2016-01-21 09:10 Improvement of the time synchronization precision by the network-assisted GPS time synchronization systems Keisuke Nishi, Shigeo Otsu, Seiji Yoshida, Takashi Hirose (NTT)  CS2015-73 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | When navigation satellite systems such as GPS are employed for time synchronization, degradation of synchronization accuracy due to reduction of number of receivable satellites and multipath signal will be a problem. We estimate signal detection characteristics of GPS satellites from spatial information around the GPS antenna and experimentally evaluate status of a multipath signal as well as degradation of time synchronization precision for non-ideal condition for GPS signal detection. We propose network-assisted GPS time synchronization which selects timing of synchronization to GPS satellites and satellites to be used for synchronization (Active Navigation Satellite Selection : ANSS), and conduct proactive holdover during time period inappropriate for satellite signal detection (Active Holdover : AHO). An experimental evaluation result of the improvement of time synchronization precision with proposed systems is reported. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Mobile / Base Station / TD-LTE / TDD / Time Synchronization / GPS / GNSS / Fish-eye Lens | |
| Reference Info. | IEICE Tech. Rep., vol. 115, no. 406, CS2015-73, pp. 1-6, Jan. 2016. | |
| Paper # | CS2015-73 | |
| Date of Issue | 2016-01-14 (CS) | |
| 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) | |
| Notes on Review | This article is a technical report without peer review, and its polished version will be published elsewhere. | |
| Download PDF | CS2015-73 |
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| Conference Information | |
| Committee | CS OCS |
| Conference Date | 2016-01-21 - 2016-01-22 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Kagoshima University, Korimoto Campus, Inamori Auditorium |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Network Core/Metro Systems, Submarine Transmission Systems, Optical Access Systems/Next Generation PON, Ethernet, Optical Transport Network (OTN), Transmission Monitoring and Supervisory Control, Optical Transmission System Design/Tools, Mobile Optical Network |
| Paper Information | |
| Registration To | CS |
| Conference Code | 2016-01-CS-OCS |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Improvement of the time synchronization precision by the network-assisted GPS time synchronization systems |
| Sub Title (in English) | |
| Keyword(1) | Mobile |
| Keyword(2) | Base Station |
| Keyword(3) | TD-LTE |
| Keyword(4) | TDD |
| Keyword(5) | Time Synchronization |
| Keyword(6) | GPS |
| Keyword(7) | GNSS |
| Keyword(8) | Fish-eye Lens |
| 1st Author's Name | Keisuke Nishi |
| 1st Author's Affiliation | Nippon Telegraph and Telephone Corporation (NTT) |
| 2nd Author's Name | Shigeo Otsu |
| 2nd Author's Affiliation | Nippon Telegraph and Telephone Corporation (NTT) |
| 3rd Author's Name | Seiji Yoshida |
| 3rd Author's Affiliation | Nippon Telegraph and Telephone Corporation (NTT) |
| 4th Author's Name | Takashi Hirose |
| 4th Author's Affiliation | Nippon Telegraph and Telephone Corporation (NTT) |
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| Speaker | Author-1 |
| Date Time | 2016-01-21 09:10:00 |
| Presentation Time | 25 minutes |
| Registration for | CS |
| Paper # | CS2015-73 |
| Volume (vol) | vol.115 |
| Number (no) | no.406 |
| Page | pp.1-6 |
| #Pages | 6 |
| Date of Issue | 2016-01-14 (CS) |
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