Road-vehicle communication system, and roadside apparatus, mobile apparatus which are used for the same

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,
• the application section comprising:
• a switching request issuing unit for issuing a switching request for switching to the non-IP based communication protocol or the IP based communication protocol, to the mobile apparatus by use of the IP based communication protocol or the non-IP based communication protocol;
• a switching response receiving unit for receiving a switching response to the switching request, by use of the non-IP based communication protocol or the IP based communication protocol, from the mobile apparatus;
• and
• a specifying unit for associating the switching request issued by the switching request issuing unit with the switching response received by the switching response receiving unit, and specifying the mobile apparatus in a first process using the IP based communication protocol and a second process using the non-IP based communication protocol,
• 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.

A mobile apparatus for use in a road-vehicle communication system, comprising:

• a communication unit for carrying out communication with a roadside 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;
• a notifying unit for transmitting a second identifying information for identifying the mobile apparatus in the non-IP based communication protocol to the roadside apparatus,
• wherein in response to transmitting the second identifying information, the mobile apparatus receives a first identifying information generated by the roadside apparatus for identifying the mobile apparatus in the IP based communication protocol, the first identifying information and second identifying information being associated with the mobile apparatus;
• and
• an application section for performing a series of processes using both an IP based communication and 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 performs the series of processes using both the IP based communication and the non-IP based communication during communication with the roadside apparatus based on the associated first identifying information and second identifying information, by switching between the first process and the second process.

A mobile apparatus for use in a road-vehicle communication system, comprising:

• a communication unit for carrying out communication with a roadside 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;
• a notifying unit for transmitting to a roadside apparatus, a second identifying information for identifying the mobile apparatus in the non-IP based communication protocol,
• wherein in response to transmitting the second identifying information, the mobile apparatus receives from the roadside apparatus, a first identifying information generated by the roadside apparatus for identifying the mobile apparatus in the IP based communication protocol;
• an IP series protocol section for associating the first identifying information for identifying the mobile apparatus in the IP based communication protocol with the second identifying information for identifying the mobile apparatus in the non-IP based communication protocol;
• 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,
• the application section comprising:
• a switching request receiving unit for receiving a switching request to the non-IP based communication protocol or the IP based communication protocol, by use of the IP based communication protocol or the non-IP based communication protocol;
• a switching unit for switching a communication protocol using for the communication to the non-IP based communication protocol or the IP based communication protocol, in response to the switching request received by the switching request receiving unit;
• and
• a switching response transmitting unit for transmitting a switching response to the switching request by use of the non-IP based communication protocol or the IP based communication protocol,
• wherein the application section performs the series of processes using both the IP based communication and non-IP based communication during communication with the roadside apparatus specifying the mobile apparatus by associating switching request received by the switching request receiving unit with the switching response transmitted by the switching response transmitting unit, by switching between the first process and the second process.

A road-vehicle communication method using a roadside apparatus 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 and the mobile apparatus for carrying out communication with the roadside apparatus without wires, by use of communication protocols including the IP based communication protocol and the non-IP based communication protocol, the method comprising:

• transmitting, from the mobile apparatus to the roadside apparatus, a second identifying information for identifying the mobile apparatus in the non-IP based communication protocol;
• generating, by the roadside apparatus, a first identifying information for identifying the mobile apparatus in the IP based communication protocol, in response to receiving the second identifying information;
• associating, by the roadside apparatus, the first identifying information and second identifying information with the mobile apparatus;
• transmitting, from the roadside apparatus to the mobile apparatus, the first identifying information;
• and
• performing, by the roadside apparatus, 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 IP based communication protocol and the non-IP based communication protocol are transmitted using a common transmission method,
• wherein the performing step further comprises:
• 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 performing step 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 step, by switching between the first process and the second process.