Latency and Packet Loss of an Interferred 802.15.4 Channel in an Industrial Environment

Delsing, Jerker; Eliasson, Jens; Leijon, Viktor

doi:10.1109/sensorcomm.2010.12

Cited by 9 publications

(5 citation statements)

References 12 publications

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“…Farrell et al [47] demonstrated that delays of 100-125 ms are not perceivable by the user and do not negatively influence the performance. The calculated packet loss rate was substantially smaller than those presented in [62][63][64], assuring stable Bluetooth transmission and transceiver communication. Furthermore, it allows for the possibility to increase the sampling rate of data communication without impacting the quality of the transmitted signal.…”

Section: Discussionmentioning

confidence: 71%

A non-invasive wearable sensory leg neuroprosthesis: mechanical, electrical and functional validation

et al. 2022

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Objective. Lower limb amputees suffer from a variety of functional deficits related to the absence of sensory communication between the central nervous system and the lost extremity. Indeed, they experience high risk of falls, asymmetric walking and balance, and low prosthesis embodiment, that significantly decrease their quality of life. Presently, there are no commercially available devices able to provide sensory feedback to leg amputees. Recently, some invasive solutions (i.e. requiring a surgery) have been proposed by different research groups, however a non-invasive effective alternative exploitable in everyday life is still missing. Approach. To address this need we developed and tested a lightweight, non-invasive, wearable technology (NeuroLegs) providing sensory (i.e. knee angle joint and tactile) feedback to the users through electro-cutaneous stimulation. A user-friendly GUI and mobile App have been developed to easily calibrate and control the system. Standard mechanical and electrical tests were performed to assess the safety and reliability of the technology. Main results. No mechanical failures, stable communication among system parts and a long-lasting battery (>23h) were demonstrated. The NeuroLegs system was then verified in terms of accuracy in measuring relevant gait parameters in healthy participants. A high temporal reliability was found when detecting stride features (important for the real-time configuration) with a correct match to the walking cadence, in all assessed walking conditions. The effectiveness of the NeuroLegs system at improving walking of three transfemoral amputees was then verified in movement laboratory tests. Increased temporal gait symmetry and augmented confidence were found. Stepping outside from the lab, Neurolegs was successfully exploited by a transfemoral amputee in CYBATHLON Global Edition 2020 in several challenging situations related to daily-living activities. Significance. Our results demonstrate that the NeuroLegs system provides the user with useful sensory information that can be successfully exploited in different walking conditions of daily life.

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Section: Discussionmentioning

confidence: 71%

A non-invasive wearable sensory leg neuroprosthesis: mechanical, electrical and functional validation

et al. 2022

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“…Furthermore, by avoiding device-to-cloud communication and instead using device-to-device communication, latency is reduced. The achieved latency depends on a number of factors [47], such as MAC layer performance, network size and topology, external electromagnetic noise. However, by using robust radio technologies and time-synchronous dutycycling, it is possible to deploy distributed applications with soft real-time performance.…”

Section: Discussionmentioning

confidence: 99%

Efficient Device-to-Device Service Invocation Using Arrowhead Orchestration

Paniagua

Eliasson

Delsing

2020

IEEE Internet Things J.

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The Internet of Things (IoT) enables interaction from real-world physical objects using sensors to the virtual world of computers and the Internet. The use of service-oriented architecture (SOA) is one step in the creation of basic and complex interactions between several sensors and actuators. However, the use of SOA-enabled technologies alone does not meet all requirements of how sensor and actuator systems could be integrated to create distributed monitoring and control applications. The centralized, traditional method of communication in wireless sensor networks via a gateway presents drawbacks that have to be addressed; device-to-cloud communication adds higher latency and higher power consumption and is less robust than the device-to-device communication approach. Moreover, all these characteristics reduce the scalability of the network, thus limiting the use of IoT in the industry.In this paper, the proposed method utilizes the Arrowhead framework orchestration system to generate service composition within a (wireless) network formed by IoT devices. The aim is to achieve efficient device-to-device service invocation to reduce the drawbacks of todays widely used device-to-cloud approach. The method in this paper performs efficient service composition for industrial IoT, including mapping SOA service composition in very small resource-constrained devices using the Arrowhead orchestration. The results presented in this paper at the service level can increase performance and robustness in fog computing on resource-constrained devices.

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“…Most industrial low rate wireless standards focus on the realtime communication based on the 802.15.4 physical (PHY) layer for a large-scale open-loop sensing and monitoring of the non-critical process automation [10], [60]. Some experimental results [61], [62], [63] show the applicability of the IEEE 802.15.4 PHY layer for harsh industrial environments. Although it is not originally designed for mission-critical applications, Bluetooth is also considered and reviewed as a candidate technology for WAIC systems.…”

Section: Candidate Wireless Solutions For Waicmentioning

confidence: 98%

Wireless Avionics Intra-Communications: A Survey of Benefits, Challenges, and Solutions

Park¹,

Marco²,

Nah³

et al. 2020

Preprint

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In the aeronautics industry, wireless avionics intracommunications have a tremendous potential to improve efficiency and flexibility while reducing the weight, fuel consumption, and maintenance costs over traditional wired avionics systems. This survey starts with an overview of the major benefits and opportunities in the deployment of wireless technologies for critical applications of an aircraft. The current state-of-art is presented in terms of system classifications based on data rate demands and transceiver installation locations. We then discuss major technical challenges in the design and realization of the envisioned aircraft applications. Although wireless avionics intra-communication has aspects and requirements similar to mission-critical applications of industrial automation, it also has specific issues such as complex structures, operations, and safety of the aircraft that make this area of research self-standing and challenging. To support the critical operations of an aircraft, existing wireless standards for mission-critical industrial applications are briefly discussed to investigate the applicability of the current solutions. Specifically, IEEE 802.15.4-based protocols and Bluetooth are discussed for low data rate applications, whereas IEEE 802.11based standards are considered for high data rate applications. Eventually, we propose fundamental schemes in terms of network architecture, protocol, and resource management to support the critical avionics applications and discuss the research directions in this emerging area.

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Latency and Packet Loss of an Interferred 802.15.4 Channel in an Industrial Environment

Cited by 9 publications

References 12 publications

A non-invasive wearable sensory leg neuroprosthesis: mechanical, electrical and functional validation

A non-invasive wearable sensory leg neuroprosthesis: mechanical, electrical and functional validation

Efficient Device-to-Device Service Invocation Using Arrowhead Orchestration

Wireless Avionics Intra-Communications: A Survey of Benefits, Challenges, and Solutions

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