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| Paper Abstract and Keywords | ||
| Presentation | 2007-03-09 13:40 Delayed TXOP Method for VoIP Communications in WLAN Mesh Networks Akira Yamada, Kengo Yagyu, Tomoyuki Ohya (NTT DoCoMo)  MoMuC2006-83 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | Wireless Local Area Network (WLAN) mesh network technologies represent a promising architecture for future communications to achieve a ubiquitous wireless access environment. Voice over Internet Protocol (VoIP) is an attractive application in WLAN mesh networks since it can extend the service coverage area. However, due to a large required packet overhead for voice packets and packet collisions, the number of simultaneous VoIP calls that can be supported in a WLAN mesh network is limited. The Transmission Opportunity (TXOP) mechanism, which is defined in the IEEE802.11e standard, potentially improves the overhead issue by transmitting multiple packets per random backoff. However, the TXOP mechanism does not work appropriately since the number of packets in a transmission queue may not be sufficient to transmit multiple frames using the TXOP mechanism. In this report, we propose a novel TXOP mechanism for VoIP communications in WLAN mesh networks. In the proposed method, the starting time of the TXOP transmission is adaptively delayed according to the user requirement for the delay and monitored delay inside the mesh network. Simulation results show that the number of simultaneous voice calls that can be dealt with can be improved by approximately 50%. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Mesh network / IEEE802.11 / IEEE802.11s / MAC / EDCA / TXOP / VoIP / | |
| Reference Info. | IEICE Tech. Rep., vol. 106, March 2007. | |
| Paper # | ||
| Date of Issue | 2007-03-02 (MoMuC) | |
| 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 | MoMuC2006-83 |
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| Conference Information | |
| Committee | RCS MoNA WBS SR MW |
| Conference Date | 2007-03-07 - 2007-03-09 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | YRP |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Paper Information | |
| Registration To | MoNA |
| Conference Code | 2007-03-RCS-MoMuC-WBS-SR-MW |
| Language | English (Japanese title is available) |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Delayed TXOP Method for VoIP Communications in WLAN Mesh Networks |
| Sub Title (in English) | |
| Keyword(1) | Mesh network |
| Keyword(2) | IEEE802.11 |
| Keyword(3) | IEEE802.11s |
| Keyword(4) | MAC |
| Keyword(5) | EDCA |
| Keyword(6) | TXOP |
| Keyword(7) | VoIP |
| Keyword(8) | |
| 1st Author's Name | Akira Yamada |
| 1st Author's Affiliation | NTT DoCoMo (NTT DoCoMo) |
| 2nd Author's Name | Kengo Yagyu |
| 2nd Author's Affiliation | NTT DoCoMo (NTT DoCoMo) |
| 3rd Author's Name | Tomoyuki Ohya |
| 3rd Author's Affiliation | NTT DoCoMo (NTT DoCoMo) |
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| Speaker | Author-1 |
| Date Time | 2007-03-09 13:40:00 |
| Presentation Time | 20 minutes |
| Registration for | MoNA |
| Paper # | MoMuC2006-83 |
| Volume (vol) | vol.106 |
| Number (no) | no.559 |
| Page | pp.23-26 |
| #Pages | 4 |
| Date of Issue | 2007-03-02 (MoMuC) |
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