Mac-Time-Stamping-based High-accuracy Time Synchronization for Wireless Sensor Networks

Zhang, Yushuang; Qiu, Tie; Liu, Xize; Sun, Yunchuan; Zhao, Aoyang; Xia, Feng

doi:10.1109/icsn.2016.7501927

Cited by 3 publications

(2 citation statements)

References 24 publications

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“…However, in an ad-hoc network without a base station, the available radio resources and the power for each node are scarce and limited [ 4 , 5 ]. Accordingly, this network requires an efficient synchronization algorithm that is robust against environmental changes along with low power consumption in the synchronization message exchanges [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

Fast and Robust Time Synchronization with Median Kalman Filtering for Mobile Ad-Hoc Networks

Jeon

Kim

2021

Sensors

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Time synchronization is an important issue in ad-hoc networks for reliable information exchange. The algorithms for time synchronization in ad-hoc networks are largely categorized into two types. One is based on a selection of a reference node, and the other is based on a consensus among neighbor nodes. These two types of methods are targeting static environments. However, synchronization errors among nodes increase sharply when nodes move or when incorrect synchronization information is exchanged due to the failure of some nodes. In this paper, we propose a synchronization technique for mobile ad-hoc networks, which considers both the mobility of nodes and the abnormal behaviors of malicious or failed nodes. Specifically, synchronization information extracted from a median of the time information of the neighbor nodes is quickly disseminated. This information effectively excludes the outliers, which adversely affect the synchronization of the networks. In addition, Kalman filtering is applied to reduce the synchronization error occurring in the transmission and reception of time information. The simulation results confirm that the proposed scheme has a fast synchronization convergence speed and low synchronization error compared to conventional algorithms.

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Section: Introductionmentioning

confidence: 99%

Fast and Robust Time Synchronization with Median Kalman Filtering for Mobile Ad-Hoc Networks

Jeon

Kim

2021

Sensors

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“…Global positioning system (GPS) may provide precise clock synchronization among wireless nodes [18], but all nodes cannot be equipped with GPS receivers. Network time protocol (NTP) [19] is applicable and several methods using the medium access control layer (MAC) time stamp [20][21][22] have been proposed for clock synchronization, but they require all nodes to exchange packets specialized for clock synchronization. It must be more energy-efficient to accomplish active delay tomography without the use of such specialized packets.…”

Section: Introductionmentioning

confidence: 99%

Route referencing and ordering for synchronization-free delay tomography in wireless networks

Nakanishi

Teruhito

Hara

et al. 2018

J Wireless Com Network

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Delay tomography is an inference technique for link delays in a network, where end-to-end route measurement is a promising method to reduce measurement overhead. Furthermore, by incorporating compressed sensing, delay tomography can efficiently detect sparse anomaly. In delay tomography, however, there is an inevitable issue that is clock synchronization for the route measurements. In this paper, based on route referencing, we study synchronizationfree delay tomography with compressed sensing. From theoretical analysis, optimal route referencing and ordering methods for synchronization-free delay tomography are derived as "subtractive and differential schemes," which cancel or minimize the error factors caused by clock asynchronism, clock skew, and normal link delays with single or multiple references, respectively. Simulation experiments confirm that the proposed methods can identify abnormal links more accurately with robustness against the error factors than a conventional scheme, where the newly proposed differential scheme always shows the best performance thanks to its better error factors cancelation.

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Slotted ALOHA Overlay on LoRaWAN - A Distributed Synchronization Approach

Polonelli¹,

Brunelli

Benini³

2018

2018 IEEE 16th International Conference on Embedded and Ubiquitous Computing (EUC)

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Mac-Time-Stamping-based High-accuracy Time Synchronization for Wireless Sensor Networks

Cited by 3 publications

References 24 publications

Fast and Robust Time Synchronization with Median Kalman Filtering for Mobile Ad-Hoc Networks

Fast and Robust Time Synchronization with Median Kalman Filtering for Mobile Ad-Hoc Networks

Route referencing and ordering for synchronization-free delay tomography in wireless networks

Slotted ALOHA Overlay on LoRaWAN - A Distributed Synchronization Approach

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