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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/50841

Title: The Bottleneck Problem in Large Scale IEEE 802.15.4 / ZigBee Networks
Authors: Chih-Min Chao
Hsin-Hsiang Wang
Contributors: 國立臺灣海洋大學:資訊工程學系
Keywords: wireless sensor networks
IEEE 802.15.4
data collection
ad hoc networks
ubiquitous computing
Date: 2015-05
Issue Date: 2018-10-29T01:12:47Z
Publisher: International Journal of Ad Hoc and Ubiquitous Computing
Abstract: Abstract: In this paper, we handle the bottleneck problem of ZigBee-based networks.
The bottleneck problem occurs at the nodes near the ZigBee coordinator since they
have too many data to deliver during the data gathering process. This is a fundamental
problem which reduces network throughput and prolongs transmission delay. A possible
solution is to schedule each node’s transmission/receiving time properly. Two fundamental
problems we have to answer for such scheduling are when and how long a node should
keep awake to transmit/receive packets. To achieve efficient scheduling, in this paper, we
propose a centralized Top-Down-Maximum-Load-First (TDMLF) scheme which utilizes
the contention-free Guaranteed Time Slots (GTS) defined in IEEE 802.15.4. By increasing
the number of concurrent transmissions, the proposed scheme achieves high system
utilization and thus alleviates the bottleneck problem. Through simulation and real system
implementation, we verify that TDMLF successfully reduces the negative effects caused
by the bottleneck problem.
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/50841
Appears in Collections:[資訊工程學系] 期刊論文

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