| 1. |
- Ericsson, Niclas, et al.
(författare)
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A flexible communication stack design for time sensitive embedded systems
- 2017
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Ingår i: Proceedings of the IEEE International Conference on Industrial Technology. - : Institute of Electrical and Electronics Engineers (IEEE). - 9781509053209 - 9781509053216 - 9781509053193 ; , s. 1112-1117
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Konferensbidrag (refereegranskat)abstract
- Trends like Internet of Things (IoT), 5G and Cloud are pushing for device connectivity to the Internet, which affects industrial embedded systems with e.g., an increase in code base and functionality. Due to different application requirements, there are relative little reuse between embedded systems with different run-time context (from super loop to multi-threaded), and different types of communication (best effort and real time). In order to improve code reuse and changeability, we propose a flexible communication stack design, that can be configured for time sensitive communication with a real-time operating system (RTOS), or configured for best effort communication with either a super loop or an operating system (OS). Experiments demonstrate the flexibility and simplicity of the design with different configurations, e.g., super loop, single threaded, multi-threaded. Measurements show that the variations in performance related to run-time context scales as expected.
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| 2. |
- Ericsson, Niclas, et al.
(författare)
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Challenges from research to deployment of industrial distributed control systems
- 2016
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Ingår i: 2016 IEEE 14th International Conference on Industrial Informatics (INDIN). - : Institute of Electrical and Electronics Engineers (IEEE). - 9781509028702 - 9781509028719 ; , s. 68-73
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Konferensbidrag (refereegranskat)abstract
- A trend in the industrial domain is that the networks are growing and becoming more complex, this is further accelerated by the digitalization trend. In order to address this, there is a need to improve the efficiency when moving between the R&D phases. For example, integrate innovative research findings into industrial systems, shorten time to market, improve product quality and reduce the number of issues. Despite a huge research effort on network simulators and emulators there are still some issues that needs to be addressed. This paper presents challenges that needs to be resolved, in order for the industry to adopt and benefit from using network simulators and emulators. The major challenges streamlining the workflow in and between the different R&D phases while preserving the real-time aspects in the entire industrial distributed control system.
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| 3. |
- Ericsson, Niclas, et al.
(författare)
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Custom simulation of industrial wireless sensor and actuator network for improved efficiency during research and development
- 2017
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Ingår i: IEEE International Conference on Emerging Technologies and Factory Automation, ETFA. - : .. - 9781509065059 - 9781509065042 - 9781509065066
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Konferensbidrag (refereegranskat)abstract
- Trends like the Cloud, Internet of Things and 5G are pushing for an increase in connectivity, but, introducing a new type of network in an industrial distributed control system is a big investment with high risks. Time to market with sufficient quality is crucial. However, when getting through the Research and Development (R&D) phases, a lot of time is spent on isolated activates, e.g., simulations, collecting requirements, design, coding, debugging, creating testbeds, and performing various tests. Therefore, there is a need to improve efficiency when moving between the R&D phases. For verification and validation of communication software, the most common network evaluation method in industry are real testbeds, mostly since a testbed can be very similar to the deployed system. Testbeds are, however, hard to debug and costly to maintain. Other network evaluation methods like simulators, have some strengths that testbeds are lacking, like repeatability, control over the network, and lower cost. However, code from simulators can seldom be reused, especially in industrial time-sensitive target systems, due to different abstraction levels, run-time behavior and system timing. This paper presents findings from a case study that targets improved efficiency, getting from research theories, to deployed devices in a homogeneous Industrial Wireless Sensor and Actuator Network (IWSAN). We propose a small subset of network simulators features which eases changeability, reuse, and debugging of communication software. The selected simulator features are evaluated with a proof of concept implementation that is customized to a research platform. The findings indicate improved efficiency when moving back and forth between activities in different R&D phases.
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| 4. |
- Lennvall, Tomas, 1974-, et al.
(författare)
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Industrial WSN Standards
- 2013
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Ingår i: Industrial wireless sensor networks. - Boca Raton : Taylor & Francis. - 9781466500518 - 9781466500525 ; , s. 339-358
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Bokkapitel (refereegranskat)
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| 5. |
- Åkerberg, Johan, et al.
(författare)
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Design challenges and objectives in industrial wireless sensor networks
- 2017
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Ingår i: Industrial Wireless Sensor Networks: Applications, Protocols, and Standards. - Boca Raton : CRC Press. - 9781466500525 - 9781466500518 ; , s. 79-100
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Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- In recent years the advances in wireless sensor networks have grown exponentially and WSNs have been deployed in diverse application areas such as agriculture, disaster management, intelligent transport systems, and industrial automation. In industrial automation, wireless sensor networks have so far mostly been considered within building automation, factory automation, and process automation in order to save cost in cable reduction and maintenance but also improved flexibility [14]. Recently, wireless sensor networks for smart grid applications have been discussed. Several market forecasts have recently predicted exponential growths in the sensor market over the next few years, resulting in a multi-billion dollar market in the near future. For instance, ABI research [18] predicts that in 2015 around 645 million IEEE 802.15.4 chipsets will be shipped and that the worldwide market for automation systems in process industries will grow to roughly $150 billion.
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| 6. |
- Åkerberg, Johan, et al.
(författare)
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Deterministic Downlink Transmission in WirelessHART Networks enabling Wireless Control Applications
- 2010
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Ingår i: IECON 2010 - 36th Annual Conference on IEEE Industrial Electronics Society. - New York : Institute of Electrical and Electronics Engineers (IEEE). - 9781424452255 - 9781424452262 ; , s. 2120-2125
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Konferensbidrag (refereegranskat)abstract
- Wireless sensor and actuator networks bring many benefits to industrial automation systems. However, unreliable wireless and multihop communications among sensors and actuators cause challenges in designing such systems. Wireless HART is the first standard for wireless real-time industrial applications. However, current Wireless HART standard does not provide services for efficient usage of actuators, which are an essential part of automation. In this paper we focus on Wireless HART and propose a periodic and deterministic downlink transmission functionality which enables efficient usage of actuators and control applications. Furthermore, we define new HART commands extending the interface, without affecting available services, to support the integration of actuators. This can be achieved with minor changes in the current standard.
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| 7. |
- Åkerberg, Johan, et al.
(författare)
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Efficient integration of secure and safety critical industrial wireless sensor networks
- 2011
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Ingår i: EURASIP Journal on Wireless Communications and Networking. - : Springer. - 1687-1472 .- 1687-1499. ; :1
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Tidskriftsartikel (refereegranskat)abstract
- Wireless communication has gained more interest in industrial automation due to flexibility, mobility, and cost reduction. Wireless systems, in general, require additional and different engineering and maintenance tasks, for example cryptographic key management. This is an important aspect that needs to be addressed before wireless systems can be deployed and maintained efficiently in the industry. In this paper, we take an holistic approach that addresses safety and security regardless of the underlying media. In our proposed framework we introduce security modules which can be retrofitted to provide end-to-end integrity and authentication measures by utilizing the black channel concept. With the proposed approach, we can extend and provide end-to-end security as well as functional safety using existing automation equipment and standards, such as Profisafe, Profinet IO, and WirelessHART. Furthermore, we improve the WirelessHART standard with periodic and deterministic downlink transmissions to enable efficient usage of wireless actuators, as well as improving the performance of functional safety protocols.
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| 8. |
- Åkerberg, Johan, et al.
(författare)
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Integration of WirelessHART Networks in Distributed Control Systems using PROFINET IO
- 2010
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Ingår i: 8th IEEE International Conference on Industrial Informatics (INDIN). - Osaka, Japan : Institute of Electrical and Electronics Engineers (IEEE). - 9781424472987 - 9781424473007 ; , s. 154-159
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Konferensbidrag (refereegranskat)abstract
- In this paper we describe a method to integrate WirelessHART networks in Distributed Control Systems (DCS)using PROFINET IO. By modeling the WirelessHART network in the Generic Station Description file, that describes a PROFINET IO device, the WirelessHART related configuration can be distributed from the central engineering stations. In this way, both process controller configuration and WirelessHART network configuration is engineered and maintained from a central location. Thus the end-user do not need any additional tool-specific training, as the existing tools are used to engineer the WirelessHART networks. We base the method of integration on the keywords simple deployment and maintenance, and flexible topology. A proof-of-concept implementation of the proposed method shows that it is possible to download WirelessHART configuration both to the WirelessHART network managers, as well as the WirelessHART sensors. By integrating WirelessHART in this way, maintenance is greatly simplified as the actual configuration will be downloaded automatically by the DCS when faulty field devices are replaced.
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