As a result of the COVID-19 pandemic, improving wireless connectivity on public transport has moved from an objective to a strategic imperative. Dealing with disruption, social distancing, and getting essential workers safely from A to B are all new imperatives to which public transport operators have turned to technology in order to meet. In Israel, for example, real-time traffic management systems were integrated into a Mobility-as-a-Service model to produce an on-demand transit routing algorithm that calculated the most efficient journey for each passenger and routed buses accordingly. While the system was implemented to deal with the current crisis, it could be here to stay and according to officials, may save the public $25 million a year.
Telemetry data, real-time surveillance footage, advanced payment systems, GPS for route status apps, and rider Wi-Fi represent just a handful of the myriad technologies that will be key to launching and running similar initiatives around the world. All of the above are manifestations of the connected vehicle revolution, itself the result of the greater data capacity and high-speed connectivity of 4G LTE.
But fast wireless connectivity and high bandwidth alone do not necessarily guarantee that networks will be inherently reliable. This is especially true for large-scale mass transit systems, where complexity and interoperability (i.e. with urban planning/smart city technology) must be considered. As a result, public transport operators are faced with a number of specific connectivity challenges.
Challenge #1 – Bandwidth
The bandwidth requirements of on-board technology vary from device to device – now-essential capacity sensors (which check passenger numbers are within social distancing limits), for example, will transfer much smaller data packets than streaming video from on-board surveillance cameras. Diversity in the requirements of individual devices is one thing, but the biggest challenge here is establishing and maintaining connectivity with each and every one across a fleet of potentially thousands of vehicles. This not only makes it difficult to accommodate existing devices and applications, but to continue adding more as needs arise and evolve.
To overcome issues of bandwidth, public transport operators must first ensure that in-vehicle routers are up to the task. Enterprise-grade wireless routers running on Gigabit-Class LTE are ideal for maximising bandwidth due to two core characteristics. For one, these routers will contain operator-agnostic dual modems which connect to two network carriers simultaneously. This not only helps prevent congestion on the network by splitting data traffic across multiple channels, but also ensures at least one pathway to the network is consistently available.
Secondly, in-vehicle routers must also be able to handle the bandwidth requirements of a vast array of devices simultaneously, especially when it comes to the increasing popularity of on-board passenger WiFi. With the dual-band, dual-concurrent capabilities of Wi-Fi 5, routers can support up to 100 clients simultaneously by splitting traffic across 2.4 Ghz and 5 Ghz channels. This grants passengers reliable access to the high-speed connectivity of Gigabit-Class LTE, while also providing public transport operators with a flexible and sustainable solution to issues of on-board bandwidth.
Frequent connection drop-offs make real-time data impossible, which can spell disaster for applications such as GPS data for Automatic Vehicle Location (AVL) systems and passenger apps, streamed video surveillance footage, and Traffic Signal Priority (TSP) systems. In vehicles, where a router is almost always moving, that signal is ever-changing and potentially dropping out of coverage range. Those dropouts or “dead spots” can become very problematic if mission-critical applications begin suffering interruptions.
To identify areas of both challenging and excellent wireless connectivity, public transport operators can use intelligent network management platforms to determine cellular health. These platforms combine GPS data with information relating to signal strength and carrier availability to identify problem areas and respond by changing routes or working with their carrier to develop improvements.
Data by itself, however, can only go so far. The true value of deploying such a solution is transforming insights and analytics into visual dashboards, enabling public transport operators to intuitively explore their data over a responsive map. By filtering by date, or other data criteria such as device, vehicle or location, specific issues can be easily identified and rectified, effectively eliminating the risk of network consistency problems along the route.
Challenge #3 – Management & Security
With many vehicles not only constantly on the move, but also spread across wide geographies, it’s simply not feasible for IT and fleet management to always visit vehicles in-person to manage connection problems, configuration changes, security updates, and other issues. This creates two major problems: first, connectivity failures result in widespread disruption to passengers, drivers, fleet managers and transport operators alike; second, and perhaps more concerning, is the fact that this limits the capacity for IT teams to resolve potential cybersecurity vulnerabilities and to ensure that data flowing to and from vehicles is continuously in line with data privacy regulations.
The solution lies in using the power of the cloud to remotely manage wireless edge networks, effectively granting public transport operators full visibility over the entire network. Cloud-based management tools make it easy to understand and apply licenses, identify and push out software updates, deploy new devices with zero-touch simplicity, and configure security policies to instantly protect against cybersecurity threats. Moreover, with a single-pane-of-glass overview of every device in every vehicle, IT staff can make changes to entire fleets simultaneously, all at the touch of a button.
The COVID-19 pandemic is a watershed moment in technology, with social distancing, contact tracing and environment-monitoring systems just some of the elements that will accelerate the development of smart cities. Executing upon these aspirations requires ubiquitous, enterprise-grade wireless WAN connectivity, making it imperative for public transport operators today to consider how to reach the next step in transport technologies carefully.
Amongst its many features, the high-capacity and ultra-low latency of 5G will play a critical role in enabling this vision of the future. Whether organisations are ready or not, 5G is coming. IoT system integrators in the public transportation sector therefore have a tremendous opportunity today to get on the pathway to 5G and get fully prepared for the massive changes it will bring. Operators running enterprise-grade wireless WAN networks with open, interoperable and convergent capabilities that combine front-, intermediate-haul and backhaul are already well on their way – are you?
Author: Mark Page, Strategic Account Director, Public Sector, Cradlepoint