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18METRO RAIL NEWS -AUGUST 2025 www.metrorailnews.in Operational and Communication Demands Requiring 5G in RailwaysThe railway sector in India is experiencing high passenger volume, expanding freight requirements, and the need for higher operational efficiency. Traditional railway systems, designed decades ago, are reaching their structural and technological limits. Today, rail networks are denser, trains are faster, and expectations for safety, punctuality, and passenger experience are far higher than in the past. In addition, urbanisation has intensified congestion on metropolitan rail corridors, while national freight corridors are striving to move larger volumes at higher speeds. In this context, conventional signalling, communication, and maintenance methods still rely on legacy GSM-R systems, which are not sufficient to manage the complexity of modern operations. Additionally, the government policies and infrastructure growth are creating huge space in the areas of automation and energy efficiency. Projects such as India%u2019s Dedicated Freight Corridors, Mumbai-Ahmedabad High-Speed Rail Corridor, and the rapid expansion of metro networks highlight a paradigm shift toward modernisation of rail infrastructure. However, if India wants to achieve the operational standards of global rail systems such as those in Japan, China, or parts of Europe, it will need to initiate the full-scale adoption of digital technologies. 5G technology is not simply an improvement over existing systems. It acts as a foundational platform that can support the future of autonomous trains, smart stations, and fully integrated rail mobility networks.Key requirements that can be addressed through the adoption of 5G include:%u2022Real-time information exchange: Both rail operators and passengers require faster, more reliable communication systems to enable immediate data transmission and informed decision-making. The high-speed transmission of data empowers the rail operators to control train movements, including speed, stopping, and routing.%u2022Emergency response: Limited communication capabilities can delay the ability of rail operators to respond effectively during emergencies, which increases the risk of operational and safety complications. The use of 5G-enabled networks can support faster data transmission and more reliable connectivity, which can enable faster coordination and response actions.%u2022Operational efficiency: The rail systems in India operate under immense pressure. To manage rising demand, operators traditionally need to either increase train frequency or invest in infrastructure expansion, both of which involve high costs and extended implementation timelines. By supporting advanced signalling technologies like Communication-Based Train Control (CBTC), 5G enables more precise train localisation, reduces headways, and increases line capacity without requiring physical expansion.%u2022Resource allocation: Continuous data collected from various assets such as rolling stock, station systems, and Automatic Fare Collection (AFC) units enables rail operators to analyse traffic patterns and optimise resource allocation. Additionally, this data stream supports AIbased energy management models that regulate traction power usage, control regenerative braking systems, and monitor station-level energy consumption. Implementing such data-driven strategies contributes to reduced operational costs and improved system efficiency.%u2022Predictive Maintenance: Indirectly, the 5G network helps in predictive maintenance. The implementation of 5G networks facilitates the large-scale deployment of IoT sensors across rolling stock, track infrastructure, and auxiliary systems. These sensors operate simultaneously and transmit continuous health data to centralised monitoring platforms. AI-based diagnostic models can analyse this data to detect early signs of component degradation or faults, allowing maintenance teams to take corrective action before issues escalate into failures. This approach reduces unplanned downtime and improves asset availability.Enabling Smart Railways: 5G Infrastructure and Integration FrameworkIndian Railways is operating on legacy systems. On the other hand, implementing 5G in railways requires a combination of advanced network infrastructure, dedicated hardware, and integration with existing railway systems. 1.Radio Access and Trackside Equipment: . The RAN is the most critical component of any mobile network. In the context of railways, it consists of base stations, which are known in 5G as gNodeBs. These base stations are strategically installed along the tracks. These highcapacity stations send and receive data to and from moving trains and nearby infrastructure for continuous communication. These stations are supported by small cells for dense areas and tunnels. COVER STORY