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Paper Abstract and Keywords
Presentation 2011-03-03 09:20
Time Slot Allocation Scheme enabling Simultaneous Bidirectional Traffic in Multi-hop Wireless Sensor Networks
Kyokuei Shu (Chiba Univ.), Ryota Kawamoto (Alpha Systems, Inc), Fumiya Hirose, Nobuyoshi Komuro (Chiba Univ.), Seiichiro Hara (Alpha Systems, Inc), Shiro Sakata (Chiba Univ.) IN2010-146
Abstract (in Japanese) (See Japanese page) 
(in English) In sensor networks, sensing data packets are mainly transmitted from sensor nodes to sink node. In non-beacon mode of IEEE 802.15.4, child nodes send data packets by unicast to respond to a query packet broadcast by the parent node. Collisions of unicast packets and their losses are likely to occur. This consequently causes a lot of energy consumption. In this paper, a time slot allocation scheme which can achieve spatially simultarous communication is proposed. As well as, the proposed scheme effectively reduces the packet collisions. Based on the information of two hop neighbors, each node reserves time slot through depth-first search in the tree network topology. Nodes which are spatially separated can reserve the same time slot to implement simultaneous communication. As a result, it achieves efficient use of bandwidth. The proposed method is evaluated by the simulation. The simulation result shows that the proposed method achieves low delay while keeping high delivery ratio.
Keyword (in Japanese) (See Japanese page) 
(in English) Sensor networks / ZigBee / IEEE 802.15.4 / Non-beacon mode / Time slot allocation / / /  
Reference Info. IEICE Tech. Rep., vol. 110, no. 449, IN2010-146, pp. 13-18, March 2011.
Paper # IN2010-146 
Date of Issue 2011-02-24 (IN) 
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)
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Conference Information
Committee IN NS  
Conference Date 2011-03-03 - 2011-03-04 
Place (in Japanese) (See Japanese page) 
Place (in English) Okinawa Convention Center 
Topics (in Japanese) (See Japanese page) 
Topics (in English) General, NS+IN workshop (March 3-4) 
Paper Information
Registration To IN 
Conference Code 2011-03-IN-NS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Time Slot Allocation Scheme enabling Simultaneous Bidirectional Traffic in Multi-hop Wireless Sensor Networks 
Sub Title (in English)  
Keyword(1) Sensor networks  
Keyword(2) ZigBee  
Keyword(3) IEEE 802.15.4  
Keyword(4) Non-beacon mode  
Keyword(5) Time slot allocation  
1st Author's Name Kyokuei Shu  
1st Author's Affiliation Chiba University (Chiba Univ.)
2nd Author's Name Ryota Kawamoto  
2nd Author's Affiliation Alpha Systems, Inc (Alpha Systems, Inc)
3rd Author's Name Fumiya Hirose  
3rd Author's Affiliation Chiba University (Chiba Univ.)
4th Author's Name Nobuyoshi Komuro  
4th Author's Affiliation Chiba University (Chiba Univ.)
5th Author's Name Seiichiro Hara  
5th Author's Affiliation Alpha Systems, Inc (Alpha Systems, Inc)
6th Author's Name Shiro Sakata  
6th Author's Affiliation Chiba University (Chiba Univ.)
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Speaker Author-1 
Date Time 2011-03-03 09:20:00 
Presentation Time 20 minutes 
Registration for IN 
Paper # IN2010-146 
Volume (vol) vol.110 
Number (no) no.449 
Page pp.13-18 
Date of Issue 2011-02-24 (IN) 

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