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| Presentation | 2007-05-17 13:50 Spatial opportunity for cognitive radios under directional interference Kentaro Nishimori, Rocco Di Taranto (NTT), Hiroyuki Yomo, Petar Popovski (Aalborg Univ.), Yasushi Takatori (NTT), Ramjee Prasad (Aalborg Univ.), Shuji Kubota (NTT)  AP2007-15 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | In this paper, the possibility for a short--range cognitive radio (secondary communication system) to be located within the service area of the primary system is discussed. Although the secondary system interferes with the primary system, there can be certain locations in the service area of the primary system where the cognitive radio can reuse the frequency of the primary system without disturbing it or being disturbed by the primary system. We say that in those locations there is a emph{spatial opportunity} for communication in the secondary system. The primary and secondary systems have different features and usage scenarios, which result in different deployment conditions. This gives rise to differences between the path loss for a link in the primary system and the path loss for the interference from the primary to secondary systems. This paper investigates the impact of the heterogeneous path loss conditions on the spatial opportunity for the secondary system. Our approach can be applied as a general way to investigate the coexistence among multiple systems. We clarify that the change of the path loss coefficient due to the different antenna heights of the primary and secondary systems can largely affect the spatial opportunity for frequency reuse by the cognitive radios. |
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| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Cognitive radio / reusable area / heterogenous propagation path loss conditions / directional antenna / antenna height / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 107, no. 35, AP2007-15, pp. 13-18, May 2007. | |
| Paper # | AP2007-15 | |
| Date of Issue | 2007-05-10 (AP) | |
| 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 | AP2007-15 |
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| Conference Information | |
| Committee | AP |
| Conference Date | 2007-05-17 - 2007-05-18 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Kochi Univ. of Tech. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | etc. |
| Paper Information | |
| Registration To | AP |
| Conference Code | 2007-05-AP |
| Language | English |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Spatial opportunity for cognitive radios under directional interference |
| Sub Title (in English) | |
| Keyword(1) | Cognitive radio |
| Keyword(2) | reusable area |
| Keyword(3) | heterogenous propagation path loss conditions |
| Keyword(4) | directional antenna |
| Keyword(5) | antenna height |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Kentaro Nishimori |
| 1st Author's Affiliation | NTT (NTT) |
| 2nd Author's Name | Rocco Di Taranto |
| 2nd Author's Affiliation | NTT (NTT) |
| 3rd Author's Name | Hiroyuki Yomo |
| 3rd Author's Affiliation | Aalborg University (Aalborg Univ.) |
| 4th Author's Name | Petar Popovski |
| 4th Author's Affiliation | Aalborg University (Aalborg Univ.) |
| 5th Author's Name | Yasushi Takatori |
| 5th Author's Affiliation | NTT (NTT) |
| 6th Author's Name | Ramjee Prasad |
| 6th Author's Affiliation | Aalborg University (Aalborg Univ.) |
| 7th Author's Name | Shuji Kubota |
| 7th Author's Affiliation | NTT (NTT) |
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| Speaker | Author-1 |
| Date Time | 2007-05-17 13:50:00 |
| Presentation Time | 25 minutes |
| Registration for | AP |
| Paper # | AP2007-15 |
| Volume (vol) | vol.107 |
| Number (no) | no.35 |
| Page | pp.13-18 |
| #Pages | 6 |
| Date of Issue | 2007-05-10 (AP) |
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