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Paper Abstract and Keywords
Presentation 2015-03-05 09:55
Novel Coexistence Scheme between WLAN and RoF-based WLAN
Kaito Funabiki, Takayuki Nishio, Masahiro Morikura, Koji Yamamoto (Kyoto Univ.), Daisuke Murayama, Takatoshi Sugiyama (NTT) SRW2014-50
Abstract (in Japanese) (See Japanese page) 
(in English) To facilitate management of a wireless local area network (WLAN) system, the WLAN system with radio-over-fiber (RoF) is one of the promising systems.In the system, access points (APs) are replaced by radio-frequency (RF) units. Each unit consists of an antenna, amplifiers, analog-to-digital (AD)/digital-to-analog (DA) converters, and an interface circuit.The residual physical (PHY) and media-access-control (MAC) functions of the existing APs are moved to the central office's facility which is connected to the RF unit with the optical fibers.This system causes large propagation delay between stations and an AP, thus frame collisions occurs frequently in a conventional MAC protocol.In particular, when a legacy WLAN coexists with the RoF based WLAN, the throughput performance of an AP in the RoF based WLAN decreases largely.To solve this problem, we propose a method to increase the transmission opportunity where the RoF AP can transmit frames without collisions.
The simulation results show that the proposed method increases TCP throughput and MAC layer fairness between uplink and downlink transmissions in the RoF based WLAN.
Keyword (in Japanese) (See Japanese page) 
(in English) propagation delay / radio over fiber / long-distance communication / coexistence / RTS/CTS access / / /  
Reference Info. IEICE Tech. Rep., vol. 114, no. 492, SRW2014-50, pp. 19-24, March 2015.
Paper # SRW2014-50 
Date of Issue 2015-02-25 (SRW) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
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 SRW2014-50

Conference Information
Committee RCS SR SRW  
Conference Date 2015-03-04 - 2015-03-06 
Place (in Japanese) (See Japanese page) 
Place (in English) Tokyo Institute of Technology 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Mobile Communication Workshop 
Paper Information
Registration To SRW 
Conference Code 2015-03-RCS-SR-SRW 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Novel Coexistence Scheme between WLAN and RoF-based WLAN 
Sub Title (in English)  
Keyword(1) propagation delay  
Keyword(2) radio over fiber  
Keyword(3) long-distance communication  
Keyword(4) coexistence  
Keyword(5) RTS/CTS access  
1st Author's Name Kaito Funabiki  
1st Author's Affiliation Kyoto University (Kyoto Univ.)
2nd Author's Name Takayuki Nishio  
2nd Author's Affiliation Kyoto University (Kyoto Univ.)
3rd Author's Name Masahiro Morikura  
3rd Author's Affiliation Kyoto University (Kyoto Univ.)
4th Author's Name Koji Yamamoto  
4th Author's Affiliation Kyoto University (Kyoto Univ.)
5th Author's Name Daisuke Murayama  
5th Author's Affiliation Nippon Telegraph and Telephone Corporation (NTT)
6th Author's Name Takatoshi Sugiyama  
6th Author's Affiliation Nippon Telegraph and Telephone Corporation (NTT)
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Speaker Author-1 
Date Time 2015-03-05 09:55:00 
Presentation Time 25 minutes 
Registration for SRW 
Paper # SRW2014-50 
Volume (vol) vol.114 
Number (no) no.492 
Page pp.19-24 
Date of Issue 2015-02-25 (SRW) 

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