On the use of White Rabbit for Precise Time Transfer in 5G URLLC Networks for Factory Automation Applications

Seijo, Óscar; Val, Iñaki; López-Fernández, Jesús A.; Montalbán, Jon; Iradier, Eneko

doi:10.1109/icphys.2019.8780178

Cited by 3 publications

(2 citation statements)

References 12 publications

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“…The wireless white rabbit approaches are mainly based on transmitting the clock phase and frequency from the master to the slave, and synchronize the slave clock by using an Analog Phase Locked Loop (PLL). For example, the design presented in [25] estimates the clock phase and frequency to synchronize the slave of a 5G wireless backhaul link, obtaining (by simulations) an accuracy of about 40 ps in LoS conditions. However, the system performance is highly degraded when a simple multipath propagation channel is considered, and the synchronization accuracy drops immediately to more than 1 ns.…”

Section: Background and Related Workmentioning

confidence: 99%

Enhanced Timestamping Method for Subnanosecond Time Synchronization in IEEE 802.11 Over WLAN Standard Conditions

Seijo

López-Fernández

Bernhard

et al. 2020

IEEE Trans. Ind. Inf.

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The Time-Sensitive networks paradigm envisions the integration of Operation Technology and Information Technology in the same network. One of the requirements for building Time-Sensitive networks is sharing a global time along the network. This requirement is especially critical in wireless systems, where there are few robust methods to perform accurate time transfer. In this paper, the problem of time transfer over realistic wireless channels is studied and a time distribution scheme is proposed. The time distribution scheme has three components: Precision Time Protocol, a novel timestamping method (enhanced timestamps) and an algorithm to implement the enhanced timestamps. The performance of the proposed scheme has been evaluated in MATLAB using the IEEE 802.11n standard under several standard Wireless Local Area Network channel models. The results show that the system can reach subnanosecond time transfer accuracy under Non-Line-of-Sight and time-variant conditions, but its performance greatly depends on the Signal-to-Noise-Ratio and on the channel variation rate.

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Section: Background and Related Workmentioning

confidence: 99%

Enhanced Timestamping Method for Subnanosecond Time Synchronization in IEEE 802.11 Over WLAN Standard Conditions

Seijo

López-Fernández

Bernhard

et al. 2020

IEEE Trans. Ind. Inf.

Self Cite

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“…Under this context, there are specific IEEE 1588 profiles such as ITU-T G.8265.1, G.8275.1 and G.8275.2 that have been designed to fulfill the existing telecommunication infrastructures requirements. In addition to current mobile networks needs, Fifth Generation (5G) technologies demand more strict synchronization requirements between 110 ns and 12.5 ns [25] and, at the same time, require advanced reliability and redundancy capabilities [22], [25]- [27].…”

Section: Introductionmentioning

confidence: 99%

10 Gigabit White Rabbit: Sub-Nanosecond Timing and Data Distribution

et al. 2020

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Time synchronization is a critical feature for many scientific facilities and industrial infrastructures. The required performance is progressively increasing everyday, for instance, few tens of nanoseconds for Fifth Generation (5G) networks or sub-nanosecond accuracy on next family of particle accelerators and astrophysics telescopes. Due to this exigent accuracy, many applications require specific timing dedicated networks, increasing the system cost and complexity. Under this context, the new IEEE 1588-2019 High Accuracy (HA) default profile is intensively based on White Rabbit (WR) which can provide sub-nanosecond accurate synchronization for Ethernet networks. However, current WR solutions have not been designed to work properly with high data bandwidth delivery services even in 1 Gigabit Ethernet (GbE) links. On this contribution, the authors propose a new architecture design that enables WR and, consequently, the IEEE 1588-2019 HA profile to be deployed over 10 GbE links solving the already identified data bandwidth problem. Furthermore, this work addresses different experiments needed to characterize the system performance in terms of time synchronization and data transfer. As final result, this contribution presents for the first time in the literature a new WR system which allows high bandwidth data exchange in 10 GbE networks while providing sub-nanosecond accuracy synchronization. The proposed solution maintains the time synchronization performance of existing WR 1 GbE devices with significant advantages in terms of latency and data bandwidth, enabling its deployment in applications that integrate data and synchronization information in the same network.

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An Exploration of Openness in Hardware and Software Through Implementation of a RISC-V Based Desktop Computer

Butler

Gamalielsson

Lundell

et al. 2022

Proceedings of the 18th International Symposium on Open Collaboration

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On the use of White Rabbit for Precise Time Transfer in 5G URLLC Networks for Factory Automation Applications

Cited by 3 publications

References 12 publications

Enhanced Timestamping Method for Subnanosecond Time Synchronization in IEEE 802.11 Over WLAN Standard Conditions

Enhanced Timestamping Method for Subnanosecond Time Synchronization in IEEE 802.11 Over WLAN Standard Conditions

10 Gigabit White Rabbit: Sub-Nanosecond Timing and Data Distribution

An Exploration of Openness in Hardware and Software Through Implementation of a RISC-V Based Desktop Computer

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