Telematics, which is a compound word of a telecommunication and informatics, provides drivers with useful driving information such as driving path guidance, accident or robbery detection, traffic conditions and other valuable data at real time. As the...
Telematics, which is a compound word of a telecommunication and informatics, provides drivers with useful driving information such as driving path guidance, accident or robbery detection, traffic conditions and other valuable data at real time. As the number of vehicles on the road has steadily risen during the last 10 years, the traffic accidents, the congestion, and road damage have also increased dramatically. Telematics are considered as a promising way of reducing these kinds of problems. Recently, good-quality contents and cheap terminals with good performance and communication capability are required to offer various network services.
This paper proposes and implements how to build a telematics terminal equipped with CDMA and GPS running embedded Linux, to check a vehicle’s state through communication between telematics server and vehicle terminals using a cellular phone and to control a vehicle using SMS as shown in Figure 1. In order to do this, we use the SK-VM platform which is mobile terminal platform based on JAVA to design, implement and evaluate it.
The proposed system is divided into diagnosis and control systems. The diagnosis system is for confirming the status and location of vehicle using cellular phone, which is implemented based on the SK-VM. The control system, using an embedded CDMA modem in telematics terminal, is designed to use SMS to control the vehicle. The components of the vehicle diagnosis and control system consist of a cellular phone, a server for the telematics services, and an in-vehicle terminal. A cellular phone can connect to the telematics server and receive the status and location data of the vehicle via HTTP and displays this information to the user. On the other hand, the SMS code is transmitted to the in-car terminal to control it. Telematics server offers information stored in its database to the user after authorization process when a request from user’s cellular phone is received. It also stores or renews the information depending on new data received from the terminal. The in-vehicle terminal offers vehicle status and location information via an embedded CDMA network to the telematics server.