Wireless Precision Time Protocol

Garg, Ayush; Yadav, Akash; Sikora, Axel; Sairam, Ashok Singh

doi:10.1109/lcomm.2017.2781706

Cited by 25 publications

(13 citation statements)

References 6 publications

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“…The presented outcome shows the sub-microsecond synchronization via a wireless link. [71] advises a novel version of PTP named as wireless precision time protocol (WPTP) for multi-hop wireless networks.…”

Section: Wireless Ptpmentioning

confidence: 99%

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IEEE 1588 for Clock Synchronization in Industrial IoT and Related Applications: A Review on Contributing Technologies, Protocols and Enhancement Methodologies

et al. 2020

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Precise time synchronization becomes a vital constituent due to the rigorous needs of several time-sensitive applications. The clock synchronization protocol is one of the fundamental factors that can define the quality of communication. Our study starts with a brief discussion on the application domain of precise time synchronization and comes with an in-depth study of the synchronization with the main focus on the IEEE 1588 Precision Time Protocol (PTP). We have compared the well-known synchronization techniques and conclude that the PTP is the most appropriate answer to robust clock synchronization though challenges are there that requires thoughtful efforts and modification in the current version. The working mechanism and main components of the PTP network are discussed. We have established a testbench using commercially available devices and development boards to evaluate the PTP performance under different configurations. Major sources of synchronization error and other aspects contributing to precision are examined. This paper discussed numerous approaches that could enhance the performance of the PTP protocol. Structures for PTP based wireless clock synchronization required by advanced applications has also been discussed. In the end, paper focuses on the main industrial application areas in which PTP plays an important role, including WLAN, optical data centers, Smart grid, IEC 61850, etc. We conclude the paper by identifying the future trends and research directions for PTP based clock synchronization.

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Section: Wireless Ptpmentioning

confidence: 99%

“…Revealed the influence of real time traffic on the queuing delays. [71] Proposed a wireless precision time extended version of PTPv2 for multi-hop wireless networks.…”

Section: Simulations (Libptp Omnet++)mentioning

confidence: 99%

IEEE 1588 for Clock Synchronization in Industrial IoT and Related Applications: A Review on Contributing Technologies, Protocols and Enhancement Methodologies

et al. 2020

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“…The time synchronization structure of the proposed substation model is designed with a master-slave based time synchronization protocol which is supported with hardware timestamping structure [8]. This structure provides sub-microsecond synchronization accuracy among the collaborative IEDs regardless of the wired or wireless network [8,21,22].…”

Section: Distributed Sensing In Power System Environmentmentioning

confidence: 99%

“…Time synchronization error was applied to B-phase of V/I signal under AB fault case. The operation of digital distance protection was based on the measurement and evaluation of the short-circuit impedance by using the phasors of discrete voltage and current signal [21]. For each of fault types, different formulas should be adopted when calculating the fault impedance.…”

Section: Application Of Precise Time Synchronization For Collaboramentioning

confidence: 99%

The Effect of Time Synchronization Error in LAN-Based Digital Substation

Son

Chang

Kang

2019

Sensors

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In this paper, the effect of time synchronization error on protection algorithms are studied for the usage of the LAN-based collaborative protection. In order to derive the effect of time synchronization, this paper proposes a substation model which is constructed with IEEE 1588 Precision Time Protocol (PTP) supported intelligent electronic devices. The proposed model is used as an example of a target platform to study the effect of time synchronization error with two typical substation protection algorithms, i.e., current differential-based substation protection and distance protection algorithms. From the analyzed and the simulated results, it was well observed that time synchronization error is a significant error-causing factor for both protection algorithms, resulting in erroneous detection of faults and erroneous estimation of fault distances, respectively. The results of research performed in this paper are expected to provide a good guide for constructing the future LAN-based digital power substation with precise time synchronization.

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“…In our model, different from a conventional distributed multipleinput multiple-output (MIMO) radar [30], the automotive displaced sensors operate independently and are only coarsely timesynchronized through use of standards such as IEEE 1588 generic precision time protocol (gPTP) [31], network time protocol (NTP) [32] and wireless PTP [33]. These cost-effective clock synchronization protocols are also popular in other applications, including electrical grid networks, cellular base-station synchronization, and industrial control [34].…”

Section: Introductionmentioning

confidence: 99%

Performance Bounds for Displaced Sensor Automotive Radar Imaging

Wang¹,

Mishra²

2020

ICASSP 2020 - 2020 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)

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Displaced automotive sensor imaging exploits joint processing of the data acquired from multiple radar units, each of which may have limited individual resources, to enhance the localization accuracy. Prior works either consider perfect synchronization among the sensors, employ single antenna radars, entail high processing cost, or lack performance analyses. Contrary to these works, we develop a displaced multiple-input multiple-output (MIMO) frequency-modulated continuous-wave (FMCW) radar signal model under coarse synchronization with only frame-level alignment. We derive Bayesian performance bounds for the common automotive radar processing modes such as point-cloud-based fusion as well as raw-signal-based non-coherent and coherent imaging. For the non-coherent mode, which offers a compromise between low computational load and improved localization, we exploit the block sparsity of range profiles for signal reconstruction to avoid direct computational imaging with massive data. For the high-resolution coherent imaging, we develop a method that automatically estimates the synchronization error and performs displaced radar imaging by exploiting sparsity-driven recovery models. Our extensive numerical experiments demonstrate these advantages. Our proposed non-coherent processing of displaced MIMO FMCW radars improves position estimation by an order over the conventional point-cloud fusion.

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Wireless Precision Time Protocol

Cited by 25 publications

References 6 publications

IEEE 1588 for Clock Synchronization in Industrial IoT and Related Applications: A Review on Contributing Technologies, Protocols and Enhancement Methodologies

IEEE 1588 for Clock Synchronization in Industrial IoT and Related Applications: A Review on Contributing Technologies, Protocols and Enhancement Methodologies

The Effect of Time Synchronization Error in LAN-Based Digital Substation

Performance Bounds for Displaced Sensor Automotive Radar Imaging

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