Vehicle-to-Everything (V2X) technology has the ability to establish communication encompassing architectures from vehicles to other vehicles (V2V), from vehicles to infrastructure (V2I), from vehicles to pedestrians (V2P), and from vehicles to networks (V2N). With these smart capabilities, vehicles can communicate with other vehicles, infrastructure such as traffic lights or parking lots, pedestrians using smartphones, and data centers via cellular networks. V2X will reduce traffic congestion and make driving safer. The network structure capable of supporting V2X will increase its effectiveness with the emergence of 5G in the coming period, and 5G's low latency and high data rates will help usher in a faster, safer driving era.
In the 5G Valley Open Test Field, measurements of V2X communication channel parameters have begun by beneficiaries Spark Ölçüm A.Ş., ULAK Haberleşme A.Ş., Hacettepe University, and Koç University under the V2X Channel Measurement Project in the 5.89 GHz frequency band used worldwide for Intelligent Transportation Systems. This study discusses the test and measurement requirements and regulations for the channel measurements that need to be conducted to support intelligent transportation systems in Turkey's 5.89 GHz band.
Wireless communication technologies offer a beneficial field of study for safer roads, more efficient traffic routing, and minimizing deaths and injuries caused by traffic accidents. The ability of vehicles to share road information and traffic conditions with other vehicles, pedestrians, and other infrastructural units enables better prediction of potential risks and delays on infrastructure and routes.
The most important factor in achieving these advantages lies in healthy communication between every element forming traffic. To serve this purpose, the study discusses equipment, test details, and necessary scenarios for V2V (vehicle-to-vehicle), V2I (vehicle-to-infrastructure units), and V2P (vehicle-to-pedestrian) channel measurement studies.
In the 5G Open Test Field, test scenarios planned with the basic operating frequency of 5.89 GHz have begun while vehicles are stationary or moving. Using Keysight brand 12 GSa/s Arbitrary Waveform Generator, PSG Vector Signal Generator (100 kHz-44 GHz), and UXA Signal Analyzer (2 Hz-50 GHz) equipment, measurement of channel parameters at V2X carrier frequencies will be possible.
Using monopole antennas at the carrier output and receiver input, while vehicles are stationary or moving, the sounding signal generated over the carrier is captured by the receiver, and channel parameters are measured. In the first stage, with the existing infrastructure in an open environment, priority is given to V2V (Vehicle-to-Vehicle) studies. Data regarding channel measurement parameters will be obtained while one vehicle is moving and then while two vehicles are moving. In addition, it will also be possible to conduct V2I tests with this test setup.