Paper Abstract and Keywords |
Presentation |
2019-05-30 16:20
[Invited Lecture]
A study on frequency utilization efficiency improvement for Unlicensed LPWA Takahiro Chiba, Masanori Taira, Mikio Kuwahara (Hitachi) SR2019-9 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
Recently, a lot of IoT devices are connecting to network and rapid glowth of unlicensed LPWA, such as using 920MHz, is expected. There are three issues in practical use of Unlicensed LPWA, for one reason is the packet collision caused by autonomous uplink transmission of IoT devices, and for one reason is the inefficiency for an ACK transmission, and for another is the retransmission method intended for immobile devices. To address these issues, we propose three techniques: 1. The uplink transmission control method in Unlicensed LPWA, 2. The downlink transmission reduction method related to ACK transmission, 3. The retransmission method adequate for IoT use cases. We show the performance evaluation and the simulation results to prove the proposed method improves frequency utilization efficiency. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
Unlicensed / LPWA / LoRaWAN / IoT / / / / |
Reference Info. |
IEICE Tech. Rep., vol. 119, no. 62, SR2019-9, pp. 57-62, May 2019. |
Paper # |
SR2019-9 |
Date of Issue |
2019-05-23 (SR) |
ISSN |
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) |
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SR2019-9 |
Conference Information |
Committee |
SR |
Conference Date |
2019-05-30 - 2019-05-31 |
Place (in Japanese) |
(See Japanese page) |
Place (in English) |
Tokyo Big Sight |
Topics (in Japanese) |
(See Japanese page) |
Topics (in English) |
Technical Exhibition, LPWA, General |
Paper Information |
Registration To |
SR |
Conference Code |
2019-05-SR |
Language |
Japanese |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
A study on frequency utilization efficiency improvement for Unlicensed LPWA |
Sub Title (in English) |
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Unlicensed |
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LPWA |
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LoRaWAN |
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IoT |
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1st Author's Name |
Takahiro Chiba |
1st Author's Affiliation |
Hitachi Ltd. (Hitachi) |
2nd Author's Name |
Masanori Taira |
2nd Author's Affiliation |
Hitachi Ltd. (Hitachi) |
3rd Author's Name |
Mikio Kuwahara |
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Hitachi Ltd. (Hitachi) |
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Speaker |
Author-1 |
Date Time |
2019-05-30 16:20:00 |
Presentation Time |
25 minutes |
Registration for |
SR |
Paper # |
SR2019-9 |
Volume (vol) |
vol.119 |
Number (no) |
no.62 |
Page |
pp.57-62 |
#Pages |
6 |
Date of Issue |
2019-05-23 (SR) |
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