C-ITS communications based on BLE messages

C-ITS (Cooperative Intelligent Transport System) Messages are usually sent through a specific WIFI (IEEE 802.11p) denoted also ITS-G5. This protocol is more appropriate to mobility than all other usual WiFi. The use of such networks require to vehicles and Road side Units (RSU) to be equipped with 802.11p modules. Up to now such modules are not widely distributed and have high costs. In order to recover such a weakness, we present in this paper a communication architecture based on BLE (Bluetooth Low Energy) messages. The coverage of such networks is lower than 802.11p but they are widely deployed over smartphones or some basic equipments as Raspberry-Pi stations. In this paper, we present an architecture which ensures communications between mobile stations and RSU using Bluetooth protocol. We have defined light messages which are derived from usual C-ITS messages mainly CAM (Cooperative Awareness Messages) and DENM (Decentralized Event Notification Messages). In our experimentations, we have observed that messages are properly received by vehicles driving at 130Km per hour.