Patent ID: 8606710

Claim:
A method for paying a public transportation fare via a mobile device, the method comprising: transmitting, by the transportation system, when the mobile device is connected to an Access Point (AP) installed to the transportation system, a first message to a communication service providing server, wherein the first message includes a list of mobile devices connected to the AP, including the mobile device, identification-information regarding the AP, and current location information regarding the transportation system; concluding, by the communication service providing server, that a user of the mobile device has boarded the transportation system when the communication service providing server receives the first message; transmitting, by the transportation system, when the mobile device is disconnected from the AP, a second message to the communication service providing server, wherein the second message includes the list of mobile devices connected to the AP, excluding the mobile device, the identification-information regarding the AP, and the current location information regarding the transportation system; concluding, by the communication service providing server, that the user of the mobile device has exited the transportation system when the communication service providing server receives the second message; and calculating, by the communication service providing server, the transportation fare to be charged to the mobile device based on the current location information regarding the transportation system of the first message and the second message; and transmitting a transportation fare charge message to the mobile device.