Paper Abstract and Keywords |
Presentation |
2005-01-26 17:00
An Experimental Study on Switching Threshold for Adaptive Modulation Used in Next Generation Broadband Fixed Wireless Access Systems Satoshi Konishi, Takeshi Kitahara, Shinobu Nanba, Shinichi Nomoto (KDDI R&D Labs.) |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
A number of wireless systems recently adopt adaptive modulation controls to improve frequency efficiency. The next generation broadband FWA (Fixed Wireless Access) system, which has been proposed and developed by the authors, uses quasi-millimeter band, which is vulnerable to rain attenuations, as the radio frequency of wireless links. Hence, the system equips an adaptive modulation function not only to improve the frequency efficiency but also the availability of wireless links. Although employing adaptive modulation mechanisms is becoming common among wireless systems, study results on the switching threshold for multiple modulation methods have not been reported so far. This paper introduces field experimental results on switching thresholds for adaptive modulation controls using a set of prototype equipment of the next generation broadband FWA system. The numerical results reveal that conventional scheme, in which identical switching thresholds in terms of BER are applied to all modulation methods and switching thresholds maximizing Layer-2 throughput, can neither obtain the maximum TCP throughput nor satisfy the packet loss rate of UDP traffic. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
FWA / Adaptive modulation, / Switching threshold / Rain attenuation / / / / |
Reference Info. |
IEICE Tech. Rep., vol. 104, no. 597, RCS2004-246, pp. 61-66, Jan. 2005. |
Paper # |
RCS2004-246 |
Date of Issue |
2005-01-19 (CS, RCS) |
ISSN |
Print edition: ISSN 0913-5685 |
Download PDF |
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Conference Information |
Committee |
RCS CS |
Conference Date |
2005-01-26 - 2005-01-28 |
Place (in Japanese) |
(See Japanese page) |
Place (in English) |
University of the Ryukyus |
Topics (in Japanese) |
(See Japanese page) |
Topics (in English) |
Broadband Wireless Access Techniques, Wireless Access Technologies for IP Networks, Optical Wireless Systems, Wireless Communication Systems, etc. |
Paper Information |
Registration To |
RCS |
Conference Code |
2005-01-RCS-CS |
Language |
Japanese |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
An Experimental Study on Switching Threshold for Adaptive Modulation Used in Next Generation Broadband Fixed Wireless Access Systems |
Sub Title (in English) |
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Keyword(1) |
FWA |
Keyword(2) |
Adaptive modulation, |
Keyword(3) |
Switching threshold |
Keyword(4) |
Rain attenuation |
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1st Author's Name |
Satoshi Konishi |
1st Author's Affiliation |
KDDI R&D Laboratories, Inc. (KDDI R&D Labs.) |
2nd Author's Name |
Takeshi Kitahara |
2nd Author's Affiliation |
KDDI R&D Laboratories, Inc. (KDDI R&D Labs.) |
3rd Author's Name |
Shinobu Nanba |
3rd Author's Affiliation |
KDDI R&D Laboratories, Inc. (KDDI R&D Labs.) |
4th Author's Name |
Shinichi Nomoto |
4th Author's Affiliation |
KDDI R&D Laboratories, Inc. (KDDI R&D Labs.) |
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Speaker |
Author-1 |
Date Time |
2005-01-26 17:00:00 |
Presentation Time |
20 minutes |
Registration for |
RCS |
Paper # |
CS2004-139, RCS2004-246 |
Volume (vol) |
vol.104 |
Number (no) |
no.594(CS), no.597(RCS) |
Page |
pp.61-66 |
#Pages |
6 |
Date of Issue |
2005-01-19 (CS, RCS) |
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