基于移动模型的水下传感器网络时间同步算法

doi:10.11959/j.issn.1000-436x.2016001

Abstract

Abstract:

With the characteristics of high transmission delay and mobility, distributed time synchronization of underwa-ter sensor networks can be very challenging. The existing works cannot get high accuracy, because most of them ignore the long transmission latency, or dynamic changing tra ission delay caused by the mobility. A mobility model was built considering the effect of mobility and long transmission latency on time synchronization, and a time synchronization parameters equation was formed according to the mobili model. Thus, based on the equation, a time synchronization algorithm (MM-sync) was proposed. The experiment results show that MM-sync can reduce the consumption of energy, and can get higher accuracy than state-of-art solutions in high density underwater sensor networks with rapid movement.

Key words: sensor networks, underwater environment, high latency propagation networks, time synchronization, mobil-ity model

qiang WANGHui,xiu WENXiu,yu LINJun,sheng FENGGuang,wu LYUHong. Time synchronization algorithm based on mobility model for underwater sensor networks[J]. Journal on Communications, 2016, 37(1): 1-9.

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References 14

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实验参数	参数值
浮标节点的数量	1
普通传感器节点的数量	100
节点平均移动速度	1.5 m/s
可靠度门限h	0.75
置信度d	0.9
完成时间同步所需的数据分组数n	40
浮标节点发送时间同步数据分组的时间间隔	1s
水的温度q	15 ℃
水的盐度salt	35‰

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Time synchronization algorithm based on mobility model for underwater sensor networks

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