Rail
onboard network is based on Westermo Viper-212A managed routing switches and Ibex-RT-320 wireless clients that communicate via Wi-Fi with trackside access points. In addition, a collision warning system between the trains is implemented using Westermo wireless technology. A WLAN connection is automatically established between two vehicles when they approach each other effectively creating a moving Block Operation. This connection allows the onboard control systems to exchange data, enabling them to travel virtually in tandem and avoid collisions.
Infrastructure management More effi cient rail operations will be enabled by greater reliability and availability of
infrastructure data. Communication with resources spread over a large geographic area creates challenges for communications networks. Due to the limited Ethernet range capability of the existing copper cabling network, infrastructure modernisation frequently requires new fi bre optic cabling to be installed. This can cause a signifi cant impact on the capital expenditure of a project and return on investment. Typically, high-performance Ethernet networks will not propagate beyond 100m over copper cables, however, this limitation can be resolved using Westermo Ethernet extenders. These devices enable resilient cost-effective Ethernet networks to be created over long distances, at high data rates, using existing cables.
Predictive maintenance Digital transformation of the network offers the opportunity for intelligent real time data solutions that support the increased use of predictive and condition-based maintenance strategies. This enhances reliability and availability, while also saving both cost and
ensures fast and secure connection at depots and stations, but can also provide seamless roaming, with continuous coverage along the complete track.
Passenger journey experience Onboard connectivity is an increasingly
time. Built-in sensors and track monitoring systems are widely deployed on trains to gather information, which provides data on deterioration or sub-optimal performance. This data, which is communicated to the wayside, can be analysed and used for predictive maintenance, helping to limit in- service failures and train delays.
Reliable train-to-trackside communication technology is a pre-requisite for utilising this onboard data. A robust, resilient wireless network providing train-to-ground communication can be realised using Westermo Gigabit WLAN dual-band, Wi-Fi 6 access points, which are suitable for both onboard and trackside applications. This
signifi cant differentiator for the public when travelling. Train-to-ground wireless networks are progressively being deployed to provide services for rail passengers and staff. These services include CCTV, public Wi-Fi, VoIP and passenger information systems that are helping to improve the journey experience. Reliable Wi-Fi internet availability has become a vital part of our everyday lives, but this is often not the case on many train journeys. Most public Wi-Fi solutions today are not designed for high-density applications with multiple users or for other wireless networks in close proximity. However, Wi-Fi 6 has been developed for exactly this environment and devices such as Westermo’s Wi-Fi 6 and LTE 5G WI-FI access points enable train manufacturers and operators to meet passenger expectations.
www.westermo.co.uk
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Components in Electronics
June 2023 15
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