A Study on Advanced Location Awareness Component using Smart Phone GPS in BIS

Abstract

A BIS(Bus Information System) collects, processes and analyzes information such as real-time location and operation status during bus operation. And It is a system that provides valid information to citizens, drivers, traffic centers and bus companies. Transport information system sent by an each bus is collected through GPS(Global Positioning System), DSRC(Dedicated Short Range Communications), Beacon and passed to transport information center. BIS data by collected is handled and analyzed. Next, it is transmitted to citizen, drivers and bus companies in real time. The result of 5 times simulation satisfied the test criteria(error range ${\pm}10m$) with an average error range of 3.306m, and the reliability is increased. In this paper, we propose a improved location transfer component that can provide users to quicker and more accurate location information than existing BIS using GPS of smart phone. It can be seen that reliability is improved by securing improved bus position data.

Fig. 1. Location Based Service Data Flow[2]

Fig. 2. Code of Geo Code Access through Http Get

Fig. 3. Example of Geography Information through Geo Code

Fig. 4. Code of Geo Code Reception through read() and JSON

Fig. 5. Geo Code Data Flow[2]

Fig. 6. Permission Code for GPS LBS Use at AndroidManifest.xml

Fig. 7. Code for User Longitude Data and Latitude Data Reception

Fig. 8. Code of Destination Data Access through Http Get

Fig. 9. Code of Destination Data Access through Http Get

Fig. 10. Composition of GPS navigation message[4]

Fig. 11. Positioning via Smart phone GPS[4]

Fig. 12. Diagram of Bus Information System[4]

Fig. 13. Database Schema[4]

Fig. 14. Google’s coordinate system of Location Display & Coordinate Values on Test Device(V20)

Table 1. LBS Provider Type of Location Manager

Table 2. LBS Data Update Cycle Method of Location Manager

Table 3. Method of Location Listener

Table 4. Method of Location API

Table 5. HW&SW Environment for Component implementation

Table 6. HW&SW Environment for Component implementation on Mobile

Table 7. Mean Error Range Result of Test Device