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| Presentation | 2008-03-07 14:00 A Key Issue for MBWA Systems (2) -- Reasons of Throughput Performance Impaired by Inter-sector Interference -- Noboru Iizuka, Yasuyoshi Asano, Yoshiharu Yamazaki (Softbank Telecom), Hiroshi Oguma (Industrial Institute of Technology, Miyagi Prefectural Governmen), Suguru Kameda, Hiroyuki Nakase, Tadashi Takagi, Kazuo Tsubouchi (Tohoku Univ.)  WBS2007-106 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | Mobile broadband wireless access (MBWA) systems are attractive candidates for next generation mobile data communication systems. This paper discusses results of the MBWA system field trial with Fast Low-latency Access with Seamless Handoff Orthogonal Frequency Division Multiplexing (FLASH-OFDM). Field trial results show that the downlink throughput performance is significantly impaired by inter-sector interference. To clarify the reasons of the impairment, we carry out a computer simulation on inter-sector interference reduction capability of frequency hopping orthogonal frequency division multiple access (FH-OFDMA), which is used as a multiple access scheme in FLASH-OFDM. The results summarizes as follows. (1) The interference reduction capability of FH-OFDMA is almost the same as that of direct sequence code division multiple access (DS-CDMA), which can allocate the same frequency band to all sectors. (2) In FH-OFDMA, a long hopping-pattern length yields no site diversity effect to reduce inter-sector interference. Additionally, cumulative distribution of measured signal to noise and interference ratio (SNIR) shows that pilot signals in the neighboring sectors mainly impair the throughput performance. Since a sectored cell layout is mandatory for deployment of the MBWA systems in a high traffic area, inter-sector interference reduction is a key issue for the systems. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | MBWA / FH-OFDMA / FLASH-OFDM / Field trial / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 107, no. 520, WBS2007-106, pp. 11-16, March 2008. | |
| Paper # | WBS2007-106 | |
| Date of Issue | 2008-02-29 (WBS) | |
| 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 | WBS2007-106 |
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| Conference Information | |
| Committee | RCS AN MoNA SR WBS |
| Conference Date | 2008-03-05 - 2008-03-07 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | YRP |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Paper Information | |
| Registration To | WBS |
| Conference Code | 2008-03-RCS-AN-MoMuC-SR-WBS |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Key Issue for MBWA Systems (2) |
| Sub Title (in English) | Reasons of Throughput Performance Impaired by Inter-sector Interference |
| Keyword(1) | MBWA |
| Keyword(2) | FH-OFDMA |
| Keyword(3) | FLASH-OFDM |
| Keyword(4) | Field trial |
| Keyword(5) | |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Noboru Iizuka |
| 1st Author's Affiliation | Softbank Telecom (Softbank Telecom) |
| 2nd Author's Name | Yasuyoshi Asano |
| 2nd Author's Affiliation | Softbank Telecom (Softbank Telecom) |
| 3rd Author's Name | Yoshiharu Yamazaki |
| 3rd Author's Affiliation | Softbank Telecom (Softbank Telecom) |
| 4th Author's Name | Hiroshi Oguma |
| 4th Author's Affiliation | Industrial Institute of Technology, Miyagi Prefectural Government (Industrial Institute of Technology, Miyagi Prefectural Governmen) |
| 5th Author's Name | Suguru Kameda |
| 5th Author's Affiliation | Tohoku University (Tohoku Univ.) |
| 6th Author's Name | Hiroyuki Nakase |
| 6th Author's Affiliation | Tohoku University (Tohoku Univ.) |
| 7th Author's Name | Tadashi Takagi |
| 7th Author's Affiliation | Tohoku University (Tohoku Univ.) |
| 8th Author's Name | Kazuo Tsubouchi |
| 8th Author's Affiliation | Tohoku University (Tohoku Univ.) |
| Speaker | Author-1 |
| Date Time | 2008-03-07 14:00:00 |
| Presentation Time | 20 minutes |
| Registration for | WBS |
| Paper # | WBS2007-106 |
| Volume (vol) | vol.107 |
| Number (no) | no.520 |
| Page | pp.11-16 |
| #Pages | 6 |
| Date of Issue | 2008-02-29 (WBS) |
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