etsi_its_messages

ROS / ROS 2 Support for ETSI ITS Messages for V2X Communication

The etsi_its_messages package stack allows to use standardized ETSI ITS messages for V2X communication in ROS / ROS 2 systems. Apart from the definition of ROS message equivalents to the ETSI ITS standards, this package stack also includes a conversion node for serializing the messages to and from a UDP payload, as well as RViz plugins for visualization (ROS 2 only).

All message definitions and conversion functions are automatically generated based on the ASN.1 definitions of the standardized ETSI ITS messages.

Important

This repository is open-sourced and maintained by the Institute for Automotive Engineering (ika) at RWTH Aachen University.
V2X Communication is one of many research topics within our Vehicle Intelligence & Automated Driving domain.
If you would like to learn more about how we can support your advanced driver assistance and automated driving efforts, feel free to reach out to us!
     Timo Woopen - Manager Research Area Vehicle Intelligence & Automated Driving
     +49 241 80 23549
     timo.woopen@ika.rwth-aachen.de

etsi_its_messages

Concept

The core concept of the etsi_its_messages is to automatically generate the ROS support code based on the ASN.1 definitions of the standardized ETSI ITS messages (CodeGen). The ROS support then allows ROS applications to not only natively use corresponding ETSI ITS message types, but to also exchange encoded ETSI ITS message payloads with the world outside of ROS (Runtime).

A given ASN.1 definition is used to generate corresponding C-structures, ROS message definitions, as well as conversion functions between those two formats.

During runtime, the etsi_its_conversion ROS node converts incoming UDP payloads into corresponding ROS messages and vice versa. The ROS equivalents of the ETSI ITS messages can be used in any downstream ROS applications or visualized using the provided RViz plugins.

Supported ETSI ITS Messages

Status	Acronym	Name	Version	Definition	Repository
✅	CAM	Cooperative Awareness Message	1.4.1	Link	Link
✅	DENM	Decentralized Environmental Notification Message	1.3.1	Link	Link
🔜	MAPEM	Map Extended Message	-	-	-
🔜	SPATEM	Signal Phase and Timing Extended Message	-	-	-
🔜	CPM	Collective Perception Message	-	-	-

Packages

etsi_its_messages
├── etsi_its_coding
│   ├── etsi_its_coding         # metapackage including all coding packages
│   ├── etsi_its_cam_coding
│   └── etsi_its_denm_coding
├── etsi_its_conversion
│   ├── etsi_its_conversion     # conversion node depending on all conversion packages
│   ├── etsi_its_cam_conversion
│   ├── etsi_its_denm_conversion
│   └── etsi_its_primitives_conversion
├── etsi_its_messages           # metapackage including all others
├── etsi_its_msgs
│   ├── etsi_its_msgs           # metapackage including all msg packages
│   ├── etsi_its_cam_msgs
│   └── etsi_its_denm_msgs
└── etsi_its_rviz_plugins

`etsi_its_msgs`

The etsi_its_msgs metapackage includes one dedicated package for each ETSI ITS message type, e.g., etsi_its_cam_msgs. These packages define the ROS message equivalents to the ETSI ITS message types, e.g., etsi_its_cam_msgs/msg/CAM.

In addition, the etsi_its_msgs contains header-only libraries providing helpful access functions for modifying the deeply nested ROS messages.

Automated Generation

The ROS message files are auto-generated based on the ASN.1 definitions of the ETSI ITS message standards. Note that the ASN.1 definitions are preprocessed to only include types relevant for the particular message type.

# etsi_its_messages$
./utils/codegen/scripts/asn1ToRosMsg.py \
  asn1/reduced/cam/CAM-PDU-Descriptions.asn \
  asn1/reduced/cam/ITS-Container.asn \
  -o etsi_its_msgs/etsi_its_cam_msgs/msg

Access Functions Documentation

Click here to be taken to the API documentation for the implemented access functions.

The documentation can be generated by running Doxygen.

# etsi_its_messages/doc$
doxygen

`etsi_its_coding`

The etsi_its_coding metapackage includes one dedicated package for each ETSI ITS message type, e.g., etsi_its_cam_coding. These packages provide C++ libraries containing a struct implementation of the ETSI ITS message types including functions for encoding and decoding the structures to binary buffers.

Automated Generation

The C/C++ implementation of the message types is auto-generated based on the ASN.1 definitions of the ETSI ITS message standards, using the ASN.1 Compiler asn1c. Note that the ASN.1 definitions are preprocessed to only include types relevant for the particular message type.

# etsi_its_messages$
./utils/codegen/scripts/asn1ToC.py
  asn1/reduced/cam/CAM-PDU-Descriptions.asn \
  asn1/reduced/cam/ITS-Container.asn \
  -o etsi_its_coding/etsi_its_cam_coding

`etsi_its_conversion`

The etsi_its_conversion package provides a C++ ROS nodelet or ROS 2 component node for converting etsi_its_msgs ROS messages to and from UPER-encoded udp_msgs/msg/UdpPacket payloads. This way, ETSI ITS messages cannot only be used within the ROS ecosystem, but may also be received from or sent to outside applications.

The package depends on one dedicated package for each ETSI ITS message type, e.g., etsi_its_cam_conversion. These packages hold header-only libraries with recursive conversion functions for each nested message type.

Usage

The conversion node bridges all ETSI ITS message types at the same time in both directions.

# ROS 2
ros2 launch etsi_its_conversion converter.launch.py
# or
ros2 run etsi_its_conversion etsi_its_conversion_node --ros-args -p etsi_type:=auto

# ROS
roslaunch etsi_its_conversion converter.ros1.launch
# or
rosrun nodelet nodelet standalone etsi_its_conversion/Converter _etsi_type:=auto

Subscribed Topics

Topic	Type	Description
`~/udp/in`	`udp_msgs/msg/UdpPacket`	UDP payload for conversion to ROS
`~/cam/in`	`etsi_its_cam_msgs/msg/CAM`	CAM for conversion to UDP
`~/denm/in`	`etsi_its_denm_msgs/msg/DENM`	DENM for conversion to UDP

Published Topics

Topic	Type	Description
`~/udp/out`	`udp_msgs/msg/UdpPacket`	UDP payload converted from ROS message
`~/cam/out`	`etsi_its_cam_msgs/msg/CAM`	CAM converted from UDP payload
`~/denm/out`	`etsi_its_denm_msgs/msg/DENM`	DENM converted from UDP payload

Parameters

Parameter	Type	Description	Options
`etsi_type`	`string`	if set to `auto`, in- and outgoing UDP payloads are expected to include a 4-byte BTP header	`auto`, `cam`, `denm`

Automated Generation

The C++ conversion functions are auto-generated based on the ASN.1 definitions of the ETSI ITS message standards. Note that the ASN.1 definitions are preprocessed to only include types relevant for the particular message type.

# etsi_its_messages$
./utils/codegen/scripts/asn1ToConversionHeader.py
  asn1/reduced/cam/CAM-PDU-Descriptions.asn \
  asn1/reduced/cam/ITS-Container.asn \
  -t cam \
  -o etsi_its_conversion/etsi_its_cam_conversion/include/etsi_its_cam_conversion

Installation

All etsi_its_messages packages are released as official ROS / ROS 2 packages and can easily be installed via a package manager.

Warning

The initial release may not have been synced to the package managers yet. In the meantime, please refer to installation from source as shown below.

sudo apt update
sudo apt install ros-$ROS_DISTRO-etsi-its-messages

If you would like to install etsi_its_messages from source, simply clone this repository into your ROS workspace. All dependencies that are listed in the packages' package.xml can be installed using rosdep.

# etsi_its_messages$
rosdep install -r --ignore-src --from-paths .

# ROS 2
# workspace$
colcon build --packages-up-to etsi_its_messages --cmake-args -DCMAKE_BUILD_TYPE=Release

# ROS
# workspace$
catkin build -DCMAKE_BUILD_TYPE=Release etsi_its_messages

docker-ros

The etsi_its_messages package stack is also available as a Docker image, containerized through docker-ros. Note that launching these containers starts the etsi_its_conversion node by default.

# ROS 2
docker run --rm ghcr.io/ika-rwth-aachen/etsi_its_messages:ros2

# ROS
docker run --rm ghcr.io/ika-rwth-aachen/etsi_its_messages:ros

Acknowledgements

This work is accomplished within the projects AIthena, 6GEM and AUTOtech.agil. We acknowledge the financial support for the projects by

the European Union’s Horizon Europe Research and Innovation Programme 🇪🇺 under Grant Agreement No 101076754 for AIthena,
and the Federal Ministry of Education and Research of Germany (BMBF) 🇩🇪 for 6GEM (FKZ 16KISK036K) and AUTOtech.agil (FKZ 01IS22088A).

Notice

This repository is not endorsed by or otherwise affiliated with ETSI.

This repository uses the following software. For full license details, please refer to the specific license files of the respective software.

asn1c

BSD 2-Clause License
Copyright (c) 2003-2017  Lev Walkin <vlm@lionet.info> and contributors.
All rights reserved.

asn1tools

MIT License
Copyright (c) 2017-2019 Erik Moqvist

ETSI ITS ASN1

BSD 3-Clause License
Copyright (c) ETSI

GeographicLib

MIT License
Copyright (c) 2008-2023, Charles Karney

ROS

BSD 3-Clause License
All rights reserved.

ROS 2

Apache 2.0 License
All rights reserved.

AlexandreBarral/etsi_its_messages

etsi_its_messages

Concept

Supported ETSI ITS Messages

Packages

etsi_its_msgs

Automated Generation

Access Functions Documentation

etsi_its_coding

Automated Generation

etsi_its_conversion

Usage

Subscribed Topics

Published Topics

Parameters

Automated Generation

Installation

docker-ros

Acknowledgements

Notice

`etsi_its_msgs`

`etsi_its_coding`

`etsi_its_conversion`