PSync: Visible light-based time synchronization for Internet of Things (IoT)

Guo, XiangFa; Mohammad, Mobashir; Saha, Sudipta; Chan, Mun Choon; Gilbert, Seth; Leong, Derek

doi:10.1109/infocom.2016.7524358

Cited by 17 publications

(8 citation statements)

References 15 publications

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“…Synchronized clocks are used to achieve synchronization in the systems by making each node have a common notion of time. Time synchronization schemes [3], [27] have been developed for IoT to allow devices have a common notion of time. In [3], a visible light produced by light emitting diodes (LEDs) are used by devices within that vicinity to synchronize.…”

Section: Preliminary Experiments and Discussionmentioning

confidence: 99%

“…This work extends beyond time synchronization [3], [27] in that nodes need not only have the same notion of time, but there is a need for the right availability of nodes before executing a synchronous task. Tasks are not bundled to be scheduled together on the same processor in our scheme as in [30], rather, the same set of tasks are run across all participating nodes.…”

Section: Comparison Of This Paper and Related Workmentioning

confidence: 99%

“…To run the tasks at the same time, there is a need for synchronization primitives that would launch the tasks with the start times lined up at all IoT devices. Just having synchronized clocks [2], [3] is not sufficient because even with an earlier agreed start time, the IoT devices could fail, disconnect from the swarm [4], or be busy with a prior task. With tighter synchronization schemes, fine-grained tasks can be run across the cooperating IoT.…”

Section: Introductionmentioning

confidence: 99%

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Multipoint Synchronization for Fog-Controlled Internet of Things

Olaniyan

Maheswaran

2019

IEEE Internet Things J.

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This paper presents a fog-resident controller architecture for synchronizing the operations of large collections of Internet of Things (IoT) such as drones, Internet of Vehicles, etc. Synchronization in IoT is grouped into different classes, use cases identified and multi-point synchronous scheduling algorithms are developed to schedule tasks with varying timing requirements; strict (synchronous) and relaxed (asynchronous and local) onto a bunch of worker nodes that are coordinated by a fog resident controller in the presence of disconnections and worker failures. The algorithms use time-based or component-based redundancy to cope with failures and embed a publish-subscribe message update scheme to reduce the message overhead at the controller as the number of workers increase. The performance of the algorithms are evaluated using tracedriven experiments and practicability is shown by implementing the time-based redundancy synchronous scheduling algorithm in JAMScript -a polyglot programming platform for Cloud of Things and report initial findings.

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Section: Preliminary Experiments and Discussionmentioning

confidence: 99%

Section: Comparison Of This Paper and Related Workmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Multipoint Synchronization for Fog-Controlled Internet of Things

Olaniyan

Maheswaran

2019

IEEE Internet Things J.

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“…For example, in [187] Guo et al suggest a novel way of synchronizing IoT devices called PSync. The idea is to have receiving devices sample at a low frequency during short wake-up intervals to detect when the synchronization data will arrive from the source.…”

Section: Device Managementmentioning

confidence: 99%

Optical Wireless Communication for the Internet of Things: Advances, Challenges, and Opportunities

Hamza¹,

Tripp²

2020

Preprint

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<div>The continuous development of the Internet of Things (IoT) calls for innovative solutions and technologies to realize the IoT vision efficiently. One of the rising connectivity technologies that can potentially benefit the IoT deployment is Optical Wireless Communication (OWC) technology. In OWC, light beams from light sources are used to modulate information. The receiver demodulates the received light and processes the signal. The broad unlicensed spectrum of the OWC technology, along with its potential high bit-rate and increased physical link security, motivated researchers to consider OWC for IoT solutions. In this paper, we survey the existing literature related to using OWC technology in the IoT domain. We present the background and preliminaries of the IoT and OWC domains to understand how the OWC fits in the IoT architecture. Then we perform a comprehensive survey of literature related to the use of OWC technology in IoT applications. We highlight and summarize the major papers and experiments in the literature to provide researchers a jump-start to tap into the domain of OWC in IoT using the systemic and detailed survey presented in this paper.</div>

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“…However, the proposed protocol was implemented only on devices supporting Java Virtual Machine. In [41], a visible light based time synchronization protocol for IoT termed as PSync was introduced. The research stated that the energy consumed for a single round of synchronization based on PSync can be as low as 19 % of the energy needed to receive a small packet (1 byte) using IEEE 802.15.4 radio.…”

Section: Oiot: Applications and Challengesmentioning

confidence: 99%

Optical Internet of Things within 5G: Applications and Challenges

Teli

Zvánovec

Ghassemlooy

2018

2018 IEEE International Conference on Internet of Things and Intelligence System (IOTAIS)

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The fifth generation (5G) telecommunications standards are being developed to meet the growing demands for high-speed wireless networks (i.e., few tens of Gigabits per second). The 5G standard stems largely from an increasing number of users and plethora of different devices, collectively referred to as smart devices, connecting to a network as part of Internet-of-Things (IoT). A few potential technologies have emerged for 5G such as millimeter waves, massive multiple-input multiple-output, and small cell communications. Although these technologies would satisfy the requirements of 5G, there is a complementary alternative wireless technology of optical wireless communications (OWC), which is being considered. As part of OWC, visible light communications (VLC) and optical camera communications (OCC) are the most attractive options for 5G networks and beyond. VLC with huge frequency spectrum integrated with IoT can open up a wide range of indoor and outdoor applications as part of future smart environments. This paper provides an overview of the all-optical IoT (OIoT) focusing on VLC and OCC based potential applications and challenges as part of 5G standards. Keywords-Optical wireless communications (OWC); visible light communications (VLC); optical camera communications (OCC); Internet of things (IoT); light emitting diodes (LEDs). I.

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PSync: Visible light-based time synchronization for Internet of Things (IoT)

Cited by 17 publications

References 15 publications

Multipoint Synchronization for Fog-Controlled Internet of Things

Multipoint Synchronization for Fog-Controlled Internet of Things

Optical Wireless Communication for the Internet of Things: Advances, Challenges, and Opportunities

Optical Internet of Things within 5G: Applications and Challenges

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