Patent ID: 7890057

Claim:
A roadside apparatus for use in a road-vehicle communication system, comprising a communication unit for carrying out communication with a mobile apparatus without wires, by use of an IP based communication protocol and a non-IP based communication protocol, wherein the communication unit transmits the IP based communication protocol and the non-IP based communication protocol using a common transmission method; an IP series protocol section for generating a first identifying information for identifying the mobile apparatus in the IP based communication protocol in response to receiving a second identifying information from the mobile apparatus for identifying the mobile apparatus in the non-IP based communication protocol, and for associating the first identifying information and the second identifying information with the mobile apparatus, wherein the roadside apparatus transmits the first identifying information to the mobile apparatus; and an application section for performing a series of processes using both an IP based communication and a non-IP based communication, by switching between a first process using the IP based communication protocol and a second process using the non-IP based communication protocol, wherein the application section further comprises a specifying unit for retaining associated information of the first identifying information and the second identifying information, and specifying the mobile apparatus in the first process and the second process by the associated information, and wherein the application section performs the series of processes using both the IP based communication and the non-IP based communication during communication with the mobile apparatus specified by the specifying unit, by switching between the first process and the second process.