Abstract
This paper studies the integration of the control system and entertainment on board of train wagons. Both the control and entertainment loads are implemented on top of Gigabit Ethernet, each with a dedicated controller/server. The control load has mixed sampling periods. It is proven that this system can tolerate the failure of one controller in one wagon. In a two wagon scenario, fault tolerance at the controller level is studied, and simulation results show that the system can tolerate the failure of 3 controllers. The system is successful in meeting the packet end-to-end delay with zero packet loss in all OPNET simulated scenarios. The maximum permissible entertainment load is determined for the fault tolerant scenarios.
Highlights
Networked Control Systems (NCS) is a rapidly expanding field, with many applications, from industrial automation to intelligent transportation systems [1,2,3,4,5,6]
This paper presents a study of a train control network utilizing the Ethernet protocol without modifications
An attempt is made to maximize the number of video streams and WiFi users without jeopardizing the control load
Summary
Networked Control Systems (NCS) is a rapidly expanding field, with many applications, from industrial automation to intelligent transportation systems [1,2,3,4,5,6]. Ethernet is a non-deterministic protocol, with several sources of randomness due to the use of Carrier Sense Multiple Access with Collision Detection (CSMA/CD) [10] Such probabilistic nature is undesirable in real-time NCS implementations until certain modifications were made in order to accommodate real-time applications. This paper presents a study of a train control network utilizing the Ethernet protocol without modifications. It includes all previously mentioned issues namely the use of unmodified protocol communicating both real-time (control) and non-real-time applications (entertainment).
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