Empirical Models for the Realistic Generation of Cooperative Awareness Messages in Vehicular Networks

Most V2X (Vehicle-to-Everything) applications rely on broadcasting awareness messages known as CAM (Cooperative Awareness Messages) in ETSI or BSM (Basic Safety Message) in SAE standards. A large number of studies have been devoted to guarantee their reliable transmission. However, to date, the studies are generally based on simplified data traffic models that generate awareness messages at periodic intervals or with a constant message size. These models do not accurately represent the real generation of CAM messages that follow specific mobility-based rules. Using simplified and unrealistic traffic models can significantly impact the results and validity of the studies, and hence accurate models for the generation of awareness messages are necessary. This paper proposes the first set of models that can realistically generate CAM messages. The models have been created from real traces collected by two car manufacturers in urban, sub-urban and highway test drives. The models are based on mth order Markov sources, and model the size of CAMs and the time interval between CAMs. The models are openly provided to the community and can be easily integrated into any simulator

The IST project MATRICE on MC-CDMA transmission techniques for future Cellular Systems

This paper presents an overview of the European IST project MATRICE (MC-CDMA Transmission Techniques for Integrated Broadband Cellular Systems, IST-2001-3220), describing its tasks, goals and preliminary achievements. The main focus of the MATRICE project is the definition of a new air-interface for future cellular mobile radio systems based on Multicarrier-CDMA modulation techniques and the study of its key building blocks like receiver algorithms and flexible TX components. The nine European partners participating in this project are CEA-LETI (F), France Telecom (F), Instituto de Telecommonicaçõ (P), Mitsubishi Electric ITE-TCL (F), University of Madrid (E), University of Surrey (UK), STMicroelectronics (CH), INSA-IETR (F) and Nokia (D)

UWB and IEEE802.11bd positioning enhancements for ITS

* New and enhanced positioning technologies for the potential deployment in C-ITS are available and under development * IEEE802.11bd will provide a set of new tools for positioning when available * UWB is a promising candidate technology mainly for short range high accuracy positioning for VRUs * An integration of these technologies into future releases of the ITS standards will be required to take advantage of these capabilitie

Next Generation V2X - IEEE 802.11bd as fully backward compatible evolution of IEEE 802.11p

This White Paper describes the enhanced technical access layer features of the new IEEE 802.11bd amendment to the IEEE 802.11-2020 standard, also known as Next Generation V2X (NGV). IEEE 802.11bd is the evolutionary enhancement of the existing IEEE 802.11p amendment, which became part of the IEEE 802.11-2020 standard and is the access layer basis for the ITS-G5 set of ETSI standards. In this paper the focus will be the full access layer backward compatibility and co-channel interoperability capability of the new IEEE 802.11bd specification including the integration of the new capabilities into the set of ETSI ITS-G5 standards

Railway Use Cases for NGV

Railway use cases also relevant to NGV besides road vehicle use cases: Use Case 1: Onboard Train (Wireless train control and monitoring system (TCMS), operator oriented services, customer services) Use Case 2: Train-to-Train (Autonomous trains & collision avoidance; remote control of automatic coupling and train integrity; virtual coupling (platooning)) Use Case 3: Train-to-Trackside (Signaling, operator oriented services, customer services) Use Case 4: Vehicle-to-Train (Shared space in level crossings & shared spectrum

Railway Use Cases for NGV

Railway use cases also relevant to NGV besides road vehicle use cases: Use Case 1: Onboard Train (Wireless train control and monitoring system (TCMS), operator oriented services, customer services) Use Case 2: Train-to-Train (Autonomous trains & collision avoidance; remote control of automatic coupling and train integrity; virtual coupling (platooning)) Use Case 3: Train-to-Trackside (Signaling, operator oriented services, customer services) Use Case 4: Vehicle-to-Train (Shared space in level crossings & shared spectrum

UWB Car Attenuation Measurements

In the European regulatory domain the CEPT ECC working group TG3 on Ultra Wideband (UWB) has developed a broad framework for the regulation of the deployment of UWB devices in Europe. In the first draft of the regulation the deployment of UWB will be strictly restricted to indoor usage, prohibiting usage in cars, trains and planes in order to guarantee maximum interference mitigation towards incumbent services. Thus planned deployment of UWB in cars for different kind of application like sensor or car multimedia communications application would be prohibited under the existing regulation. The attenuation measurements presented in this paper should pave the way towards a less restrictive definition of the indoor usage model including the in-car usage. The measurements have been carried out at the premises of the Joint Research Center (JRC) in Ispra, Italy in the European Microwave Signature Laboratory (EMSL). As a main result of the measurements it can be seen that the average worst case attenuation in the frequency range of interest of the evaluated cars is in the range of the assumed indoor to outdoor attenuation of 10dB to 12dB assumed in the CEPT ECC Report 64. These results are inline with the ITU recommendation ITU-R-P 679-1.JRC.G.6-Sensors, radar technologies and cybersecurit