Measuring Mobile Network Multi-Access for Time-Critical C-ITS Applications

• Cooperative Intelligent Transport Systems (C-ITS) make road traffic safer and more efficient, but require the mobile networks to handle time-critical applications. While some applications may need new dedicated communications technologies such as IEEE 802.11p or 5G, other applications can use current cellular networks. This study evaluates the performance that connected vehicles can expect from existing networks, and estimates the potential gain of multi-access by simultaneously transmitting over several operators. We upload time-critical warning messages from buses in Sweden, and characterise transaction times and network availability. We conduct the experiments with different protocols: UDP, TCP, and HTTPS. Our results show that when using UDP, the median transaction time for sending a typical warning message is 135 ms. We also show that multi-access can bring this value down to 73 ms. For time-critical applications requiring transaction times under 200 ms, multi-access can increase availability of the network from to 57.4% to 92.0%.

Nyckelord

Intelligent systems

Intelligent vehicle highway systems

Mobile telecommunication systems

Traffic control

Wireless networks

Cellular network

Communications technology

Connected vehicles

Different protocols

Intelligent transport systems

ITS applications

Network availability

Time-critical applications

5G mobile communication systems

Publikations- och innehållstyp

ref (ämneskategori)

kon (ämneskategori)