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|Title: ||The Bottleneck Problem in Large Scale IEEE 802.15.4 / ZigBee Networks|
|Authors: ||Chih-Min Chao|
|Keywords: ||wireless sensor networks|
ad hoc networks
|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.
|Appears in Collections:||[資訊工程學系] 期刊論文|
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