Connected Vehicles, Zonal In Vehicle Network Architecture

International Journal of Trend in Scientific Research and Development (IJTSRD)
Volume 7 Issue 4, July-August 2023 Available Online: www.ijtsrd.com e-ISSN: 2456 – 6470
@ IJTSRD | Unique Paper ID – IJTSRD59616 | Volume – 7 | Issue – 4 | Jul-Aug 2023 Page 81
Connected Vehicles, Zonal In-Vehicle Network Architecture
Sanath D Javagal
Senior, AV Network Systems Engineer, Autonomous Vehicle Industry, United States
ABSTRACT
In-vehicle network architecture is crucial in modern automobiles,
enabling the seamless integration of electronic components and
systems within vehicles. This article provides an in-depth exploration
of in-vehicle network architecture, covering its history, types of
networks, communication protocols, and emerging trends. The
history section highlights the development of in-vehicle networks,
from basic electrical systems to the introduction of standardized
protocols like the Controller Area Network (CAN). The types of
networks section discusses Local Interconnect Network (LIN), CAN,
and Automotive Ethernet, outlining their characteristics and
applications. The communication protocols section explores
protocols such as CAN, LIN, FlexRay, MOST, and Ethernet,
detailing their features and use cases. Additionally, the article delves
into emerging trends, including connected vehicles, advanced driver
assistance systems (ADAS), autonomous vehicles, and cybersecurity.
The discussion emphasizes the increasing need for high-bandwidth,
low-latency communication and robust cybersecurity measures in
modern vehicles. By understanding in-vehicle network architecture
and its evolving landscape, automotive engineers and stakeholders
can navigate the complexities of designing advanced, connected
vehicles that ensure safety, efficiency, and a superior driving
experience.
KEYWORDS: Vehicle Network Architecture, Connected Vehicles,
Zonal Architecture, Automotive Network, Advanced Driver Assistance
Systems, Cybersecurity
How to cite this paper: Sanath D
Javagal "Connected Vehicles, Zonal In-
Vehicle Network Architecture"
Published in
International
Journal of Trend in
Scientific Research
and Development
(ijtsrd), ISSN:
2456-6470,
Volume-7 | Issue-4,
August 2023, pp.81-85, URL:
www.ijtsrd.com/papers/ijtsrd59616.pdf
Copyright © 2023 by author (s) and
International Journal of Trend in
Scientific Research and Development
Journal. This is an
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Attribution License (CC BY 4.0)
(http://creativecommons.org/licenses/by/4.0)
INTRODUCTION
In-vehicle network architecture is an essential aspect
of modern automobiles. It refers to the complex
system of interconnected electronic components
within a vehicle that enables various functionalities,
such as engine control, infotainment systems, and
driver assistance features. As the complexity of
vehicles continues to increase, so does the need for
more advanced in-vehicle network architecture to
manage the increasing number of electronic
components and systems.
This paper aims to thoroughly explain in-vehicle
network architecture, including its history, types of
networks, communication protocols, and emerging
trends.
History of In-Vehicle Network Architecture
The use of electronic components in vehicles dates
back to the 1960s, when basic electrical systems, such
as engine control and lighting, were introduced.
However, it was in the 1980s that in-vehicle network
architecture began to take shape. In the early 1980s,
General Motors (GM) introduced the first electronic
engine control system, which used a simple data bus
to connect various engine control components.
The first standardized in-vehicle network architecture
was introduced in the early 1990s when Robert Bosch
GmbH developed the CAN (Controller Area
Network) protocol. The CAN system was created
specifically for the automotive industry and enables
electronic components to exchange messages through
a common bus. Network protocol enabled the
development more sophisticated electronic systems,
such as anti-lock braking systems and electronic
stability control.
Today, in-vehicle network architecture has evolved
significantly, with modern vehicles containing
numerous electronic components and systems that
IJTSRD59616

International Journal of Trend in Scientific Research and Development @ www.ijtsrd.com eISSN: 2456-6470
require complex communication and control. This
section will give you an overview of the current types
of in-vehicle networks being used.
Zonal In-Vehicle Network Architecture
Zonal vehicle network architecture is a technical
framework that organizes the electronic systems and
components within a vehicle into separate zones, each
responsible for specific functionalities. It aims to
enhance the modularity, scalability, and flexibility of
the vehicle's network infrastructure while improving
overall system performance and reducing complexity.
Figure 1 An example of a zonal in-vehicle
network architecture
1. Zonal Structure: The vehicle is usuallypartitioned
into different zones based on its functions, like
powertrain control units, chassis control units,
body control units, and infotainment control units.
These zones have electronic control units (ECUs)
that manage various subsystems.
2. Zone Controllers: Each zone is equipped with a
zone controller, which acts as a central hub for the
ECUs within that zone. The zone controller
provides connectivity, communication, and
coordination between the ECUs, enabling them to
work together seamlessly. It also handles data
exchange between the zones.
3. Ethernet Backbone: Zonal architectures often
utilize an Ethernet-based backbone network,
which serves as the primary communication
infrastructure within the vehicle. Ethernet offers
high bandwidth, low latency, and scalability,
making it suitable for handling the increasing data
demands of modern vehicle systems.
4. Gateway Units: Gateway units are responsible for
interconnecting the different zones within the
vehicle. They manage communication between
the zone controllers and facilitate data exchange
across zones, allowing information to flow
between subsystems.
5. Distributed Intelligence: Zonal architectures
promote the concept of distributed intelligence,
where decision-making and processing
capabilities are distributed across the various
ECUs within each zone. This approach reduces
the reliance on a single centralized controller,
improving fault tolerance and enabling faster
response times.
6. Standardized Protocols: Zonal architectures often
rely on standardized communication protocols to
ensure interoperability and compatibilitybetween
components and subsystems. Protocols like CAN,
and Automotive Ethernet (e.g., BroadR-Reach,
1000BASE-T1, 10GBASE-T1) are commonly
used for intra-zone and inter-zone
communication.
7. Scalability and Flexibility: Zonal architectures
provide scalability by including or excluding
entire zones or individual ECUs per the vehicle's
requirements. This flexibility simplifies system
integration, facilitates future upgrades, and
supports modular vehicle designs.
8. Security and Safety: Zonal vehicle networks
incorporate security measures to protect against
unauthorized access and potential cyber threats.
Additionally, safety considerations are essential to
ensure that vital systems, like braking and
steering, remain isolated from less critical
functions to prevent any compromise in vehicle
safety.
Overall, zonal vehicle network architecture optimizes
integrating various electronic systems within a
vehicle by organizing them into zones and leveraging
standardized communication protocols. It enhances
modularity, scalability, flexibility, and system
performance while maintaining security and safety
standards.
Communication Protocols
Various communication protocols enable electronic
components to interface with other components and
the types of in-vehicle networks. The main
communication protocols used in In-vehicle network
architecture are:
1. Controller Area Network (CAN): In in-vehicle
network architecture, the CAN communication
protocol is used most. A message-based protocol
allows electronic components to exchange data in
real time. CAN operate using two types of
messages: data frames and remote frames.
Data frames are used to transmit actual data, while
remote frames are used to request data from another
electronic component. CAN also support fault
tolerance, which means that if one component fails,
the rest of the network can still operate.
2. Local Interconnect Network (LIN): LIN is a
single-wire communication protocol primarily

used for low-bandwidth applications. It is a
master-slave protocol, meaning a master
electronic component controls communication
with several slave components.
LIN is often used in interior lighting, door locks, and
window controls. It is unsuitable for high-bandwidth
applications because of its low speed and limited
capabilities.
3. FlexRay: FlexRay is a high-speed communication
protocol developed for advanced automotive
applications like steer-by-wire and brake-by-wire
systems. It operates at up to 10 Mbps speed and
supports time-triggered and event-triggered
communication.
FlexRay also supports fault tolerance and
redundancy, making it a reliable protocol for critical
automotive applications. It is less widely used than
CAN or Ethernet but is becoming increasingly
popular in high-end vehicles.
4. Media-Oriented Systems Transport (MOST):
MOST is a multimedia transmission protocol for
in-vehicle infotainment systems. It operates at up
to 150 Mbps speed and supports audio, video, and
data transmission.
MOST is a multi-master protocol, which means that
multiple electronic components can control
communication on the network. It also supports fault
tolerance and redundancy, making it a reliable
protocol for in-vehicle multimedia systems.
5. Ethernet: Ethernet is a high-speed communication
protocol becoming increasingly popular in in-
vehicle network architecture. It operates at up to
25Gbps speed and supports data, audio, and video
transmission.
Ethernet uses the IP protocol, which enables seamless
integration with other devices and networks. It also
reinforces Quality of Service (QoS) to prioritize
traffic and ensure that critical data is transmitted with
minimal delay.
Emerging Trends in In-Vehicle Network
Architecture
As in-vehicle technology evolves, several emerging
trends are shaping the future of in-vehicle network
architecture. The most significant trends are:
1. Connected Vehicles: The automotive industry is
witnessing a rise in the use of connected vehicles.
These vehicles are equipped with wireless
communication technology, including Wi-Fi and
cellular networks, allowing them to connect to the
internet and other devices.
Connected vehicles can interface with other vehicles,
infrastructure, and devices, improving safety, traffic
flow, and the overall driving experience. In-vehicle
network architecture will play a critical role in
enabling this connectivity and facilitating
communication between the various components of
connected vehicles.
2. (ADAS) Advanced Drive Assistance System:
ADAS refers to a collection of electronic systems
that aid drivers in operating their vehicles. These
systems rely on different sensors, cameras, and
other electronic components to continuously
monitor the surrounding environment and offer
immediate feedback to the driver.
ADAS systems are becoming increasingly common in
modern vehicles and are looking forward to playing a
significant role in the future of automotive
technology. In-vehicle network architecture will need
to support the high-bandwidth communication and
processing required by these advanced systems.
3. Autonomous Vehicles: Autonomous/Self-Driving
vehicles are vehicles capable of functioning
without human intervention. They use a
combination of sensors, cameras, and other
electronic components to navigate and operate
safely on the road.
In-vehicle network architecture will be critical for the
operation of autonomous vehicles, as it will enable
communication between the various electronic
components and systems required for autonomous
operation.
Autonomous vehicles will require high-bandwidth,
low-latency communication to ensure timely and
accurate data exchange between components. In-
vehicle network architecture will need to support this
level of communication to enable safe and reliable
autonomous operation.
4. Cybersecurity: Cybersecurity will become a
critical concern as vehicles become more
connected and rely more heavily on electronic
systems. There is a risk of unauthorized access
and potential harm caused by hackers and
malicious individuals exploiting vulnerabilities in
the vehicle's network architecture. If not
addressed, there is a risk of compromised
sensitive information and even the possibility of
the vehicle being controlled by unauthorized
individuals.
The network architecture of vehicles needs to have
strong cybersecurity measures in place to avoid any
unauthorized access and guarantee the safe and
trustworthy functioning of the vehicles. These

security measures can consist of things like
encryption, secure authentication, and intrusion
detection systems.
Connectivity in Connected Vehicles
Connected vehicles leverage various types of
connectivity, both within the vehicle and with the
external environment. They are interconnected
through V2V (Vehicle-to-Vehicle), V2I (Vehicle-to-
Infrastructure), V2N (Vehicle-to-Network), and V2X
(Vehicle-to-Everything) communications.
1. Vehicle-to-Vehicle (V2V): With V2V
communication, vehicles can exchange vital
information like their speed and location,
effectively decrease the chances of accidents and
improving road safety.
2. Vehicle-to-Infrastructure (V2I): With V2I
communication, vehicles can interact with traffic
infrastructure such as traffic signals, road signs,
and traffic management systems. This enables
smoother and more efficient traffic flow.
3. Vehicle-to-Network (V2N): In V2N
communication, information is exchanged by
connecting a vehicle CPU and the
telecommunication network. This allows the
vehicle to access cloud-based services such as
real-time traffic information and remote
diagnostics.
4. Vehicle-to-Everything (V2X): V2X
communication is the ultimate form of
communication, enabling a vehicle to connect
with every entity that could have an impact on it
or be impacted by it. V2X includes other vehicles,
infrastructure, pedestrians, and network.
Future of Connected Vehicles: 5G and Beyond
The advent of 5G is set to revolutionize the connected
vehicle space. With its ultra-low latency, high data
rates, and the ability to connect many devices, 5G
will unlock the true potential of connected vehicles,
supporting real-time V2X communications and
enabling advanced features such as remote vehicle
control and autonomous driving. Furthermore, 6G,
envisioned to provide even higher data rates and
lower latency than 5G, is expected to push the
boundaries of connected vehicles further.
Conclusion
The future of transportation is undeniably connected
and intelligent, and advances in in-vehicle network
architecture and communication technologies are
shaping this future. With the increasing connectivity
of vehicles, the in-vehicle network architecture will
need to evolve to support higher data rates, increased
safety, and more advanced functionalities, paving the
way for an era of safe, efficient, and intelligent
mobility.
In-vehicle network architecture is a critical aspect of
modern automobiles. It enables the various electronic
components and systems within a vehicle to
communicate and operate effectively, supporting
various functions like engine control systems,
infotainment systems, and driver assistance features.
In-vehicle network architecture has evolved
significantly since its inception in the 1980s, with
standardized protocols like CAN and the recent
development of high-speed Ethernet networks. As in-
vehicle network technology advances, emerging
trends such as connected vehicles, ADAS, and
autonomous vehicles will shape the future of in-
vehicle network architecture.
The architecture of in-vehicle networks must
accommodate the high-bandwidth and low-latency
communication that advanced systems require. It
must also incorporate strong cybersecurity measures
to guarantee vehicles’. As automotive and
transportation technology evolves, the in-vehicle
network architecture will become increasingly crucial
in enabling the next wave of advanced vehicles.
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