Redefining Speed And Facilitating Transformation in Urban Mobility

Article #4 of the IoT Foundation Series. 5G and 6G will assist in delivering smarter communication between city infrastructure and transportation.

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04 Feb, 2022

Image credit: Volkswagen

Image credit: Volkswagen

Together with Digi-Key, a distributor of electronic components, we are creating a series of articles about the technologies that make IoT possible.  This fourth article examines the impact of 5G on connected transportation. Future articles dive into IoT security. 

Introduction

The transformative potential of IoT is being felt across all sectors, however, a leading benefactor is The Smart City.  Within the rapidly expanding understanding of the smart city as a connected and interconnected network of smart objects -  transportation and mobility are key to reaching the smart city's goals of sustainability, efficiency, and safety. The expected advances in transportation and related systems depend on the high-speed, low latency data transfer offered by 5 and 6G. 

5G: The Connectivity Revolution

Unlike 4G and the previous generations of mobile standards that were designed for a mobile-first world, 5G is designed to meet the needs of a world beyond mobile, with features that enable the connection of devices, objects, machines, mission-critical systems - essentially anything that benefits from communicating. 

Based on orthogonal frequency-division multiplexing OFDM, 5G operates on similar mobile networking principles as 4G LTE, but it leverages a new 5G NR air interface to enhance the OFDM modulation further to attain a higher degree of flexibility and scalability. This capacity, combined with 5G’s usage of wider bandwidths, including the sub-6 GHz and mmWave bands, affords it multi-Gbps throughput (about 10 to 100 times faster than LTE), low latency (about 1 ms), and broader application areas. 

 5G’s speed, robustness, and ability to enable massive Machine Type Communications (mMTC) increases the potential and impact of transformative technologies like IoT, AI, Augmented Reality (AR), and Virtual Reality (VR). 

6G: Beyond 5G

6G is not an official standard yet and is still in its early research phase. However, its final form will outweigh the current 5G offer and meet the demands of the next generation of IoT with improvements in speed, coverage, network optimization, and power.

For speed, 6G is expected to leverage the use of extremely high and diverse frequencies, along with radios featuring advanced technologies to deliver data speeds expected to be in the range of 100x the current 20 Gbps theoretical speed available with 5G. For coverage, satellite technologies are currently being explored for 6G deployment. The success of this could lead to 6G becoming universal with fewer deployment hassles compared to what is being experienced with 5G and reliable connectivity for even the most remote of locations across the world. With the growing need for power efficiency in devices and power consumption being a major constraint for 5G, it only makes sense that 6G is designed with reduced power consumption in mind.

5G/6G and Mobility

The increased data speed, reduced latency, and other features of these new communication standards are transforming and unlocking new possibilities within the mobility sector. 

1. In-Vehicle Connectivity-based solutions

In-vehicle connectivity solutions are the bedrock of recent innovations in mobility. Providing cars with reliable internet connectivity allows data exchange between the car and devices. With 5G, the capabilities and applications of in-vehicle connectivity will exponentially increase, facilitating the development of more innovative applications, such as infotainment and telematics. 

2.  V2X

A major application of in-vehicle connectivity is V2X or Vehicle to Everything communication. With V2X, vehicles have the necessary communication modules that allow them to “talk” to city infrastructure (such as roads and associated infrastructure and emergency services). Work on V2X can be traced as far back as the 1970s with projects such as the Electronic Route Guidance System (ERGS). Its applications accelerated in 2010, when the W-LAN based V2X Standard (IEEE 802.11p) was released, which had provision for a Dedicated Short Range Communication (DSRC) to facilitate Vehicle to vehicle and vehicle to infrastructure tools. However, the limitations of W-LAN as the base standard led to some delay in the wide-rollout of these features until the recent development of the LTE-Based Cellular V2X (C-V2X).

C-V2X maintains the regular Uu interface that enables communications with base stations and thereby Vehicle to Network applications, it also leverages the PC5 interface (which allows devices to communicate directly without a base station in between) to enable V2X and V2I related applications.  Upgrades to C-V2X to support 5G are in place, and thanks to the increased speed and low latency, it is fast becoming a key driver of trends in mobility.

3. Connected and Autonomous Vehicles

Autonomous vehicles are edging closer to being commonplace in city streets. Autonomous vehicles leverage data from sensors enabling them to track the location of other vehicles and road users, read signs, detect lane markings and road edges, understand traffic light signals, and other tasks that allow them to operate independently.  Processing the huge amount of data from these arrays of sensors requires high-speed processors and algorithms that crunch the data in real-time and provide feedback and drive sequences that enable safe navigation.

The limitations, costs, and risks attached to these processors contribute to the challenges faced by autonomous vehicles. However, with the advent of 5G/6G in-vehicle connectivity, these vehicles will benefit from the processing capabilities of applications in the cloud, increasing the response/reaction time and overall performance of the vehicles on road, and improving security by easing the delivery of updates. 

Enabling smarter urban transportation infrastructure

The better connectivity and low latency provided by 5G has a significant impact on public and private transportation infrastructure. These will be most felt in urban areas where better public transport solutions will streamline mobility, reduce congestion and improve air quality. 

Dynamic transport planning and traffic decongestion.

Connected vehicles, bus stops, roads with embedded sensors, traffic cams, etc., will leverage V2V and V2I vehicle-to-everything (Vehicle-to-vehicle and vehicle-to-infrastructure, etc.) communication to make urban mobility more efficient. 

Connectivity between the different modes of transportation and infrastructures provided by this system will improve the mobility experience of users by allowing them to easily select a mode of transportation based on near-real-time location and ETA updates provided by connected bus stops/subways etc. Based on crowd insights, the system could also automatically reroute vehicles to routes with more demands, reducing wait time for users, and preventing the revenue and operational inefficiency issues associated with the operation of near-empty or overloaded vehicles.

5G-connected autonomous vehicles will potentially streamline traffic by reducing human error and cars programmed to leave urban areas when not in use. Their existence could also improve ride-sharing which would further reduce the number of cars on the road and ultimately reduce traffic congestion. 

All of these features and applications will be working together to prevent traffic buildups, assist with decongestion, and generally provide users with a more efficient and reliable transportation system.

Figure 1: Future mobility solutions will include autonomous public transport options. Image credit: Vodafone.

Improved Safety and transparency

In-vehicle connectivity and V2x communication will improve security and safety inside the vehicles and on the road. The ability of vehicles to talk to everything else will improve safety for drivers and other road users from pedestrians to cyclists by increasing alerts and adding emergency braking systems. Vehicles would be able to communicate with one another, alongside sensors placed on roads, signposts, etc., to share information that helps enforce speed limits. Environmental data that affects the journey, such as alerts on bad road conditions, accidents, and other emergencies, will also be shared, allowing vehicles to change routes dynamically and assist other drivers when needed.  Features such as automatic real-time reporting to emergency services will mean faster response rates and fewer deaths from accidents.[1]

Summary

The development and deployment of 5 and 6G will spur new connectivity methods for transportation at all scales and deliver safer, more efficient, and more sustainable transport options. Challenges to the innovation that include security, privacy, and government regulation must be addressed by both design engineers and government agencies to ensure the potential of connected transportation is met. 

About the sponsor: Digi-Key

Digi-Key is one of the fastest-growing distributors of electronic components in the world. Since its founding in 1972, Digi-Key has been committed to offering the broadest selection of in-stock electronic components, as well as providing the best service possible to its customers, aiding engineers through the entire design process, from Prototype to Production®. 


References


  1. Monserrat JF, Diehl A, Bellas Lamas C, Sultan S. Envisioning 5G-Enabled Transport.

  2. Grijpink F, Härlin T, Lung H, Ménard A. Cutting through the 5G hype: Survey shows telcos’ nuanced views. 

04 Feb, 2022

Hardware Design Engineer and IoT Solutions Architect. Emmanuel is a Principal Solutions Architect at Hinge Systems, and an ML/AI Hardware Design Specialist at Computer Vision Applications Startup; VisionX, where he leads the development of the Edge hardware powering computer vision applications at s... learn more

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