Isochronous Wireless Network for Real-time Communication in by Henning Trsek

By Henning Trsek

This dissertation proposes and investigates an isochronous instant community for commercial regulate purposes with assured latencies and jitter. in response to a requisites research of genuine business functions and the characterisation of the instant channel, the answer method is constructed. It comprises a TDMA-based medium entry keep watch over, a dynamic source allocation and the supply of an international time base for the stressed out and the instant community. because of the worldwide time base, the answer technique permits a continuing and synchronous integration into present stressed out Real-time Ethernet systems.

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Extra info for Isochronous Wireless Network for Real-time Communication in Industrial Automation

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Hence, both aspects are further investigated in this chapter by means of extensive experiments in real environments. In Sect. 1, two factory automation applications representing the RMS application category are analysed with respect to their temporal requirements. The industrial wireless channel is characterised for both application categories in Sect. 2. The results of the channel characterisation are used as input for a realistic model of the wireless channel. The model is presented in Sect. 2 and used for the evaluation of the proposed solution approach.

Wireless Sensor and Actuator Network for Factory Automation The WSAN for factory automation is developed by the Profibus User Organization and is partly based on the previously introduced WISA system. 1 and provides a frequency hopping multiple access, i. , a combination of frequency hopping and TDMA. The whole system is specifically designed for the sensors and actuators on the field level. WSAN is able to address up to 120 wireless nodes in the system, targeting applications of realtime class 2.

The mechanism also defines a channel offset for each slot which is used to calculate different transmission frequencies for consecutive slotframes resulting in a channel hopping. Due to the mesh topology of the network, the achievable latency is in the order of ≥ 100 ms [125]. The required accuracy of the clocks is in the range of 1 ms [159]. In this context the 6TiSCH activities within a new Internet Engineering Task Force (IETF) working group must be considered [134]. 11 23 (6top). This sublayer will be mainly responsible for the scheduling of data transmissions, i.

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