Patent ID: 8412107

Claim:
An on-board communication device, which is mounted in mobile stations or a base station and serves as a receiving side or a transmitting side between said mobile stations and between said mobile stations and said base station through wireless communication, said on-board communication device comprising: an application processing section periodically transmitting messages to said on-board communication device on said receiving side; a transaction managing section connected to said application processing section and providing at least transaction services including retransmission and division/assembly of said messages received from said application processing section; a transfer service processing section connected to said transaction managing section and adding, to said messages received from said transaction managing section, local port numbers for identifying upper protocols including said application processing section; a car-to-car communication transfer service processing section connected to said transfer service processing section, transmitting said messages received from said transfer service processing section to said on-board communication device on said receiving side in an order of priorities of applications processed by said application processing section, transmitting/receiving said messages to said transfer service processing section, and notifying event information including error information; a transmission/reception service processing section connected to said car-to-car communication transfer service processing section and transmitting/receiving said messages received from said car-to-car communication transfer service processing section to/from said on-board communication device on said receiving side through wireless communication; and a car-to-car communication management service processing section connected to said application processing section and said car-to-car communication transfer service processing section, having said priority set by said application processing section, and notifying said priority in response to a request from said car-to-car communication transfer service processing section, wherein: said transaction managing section and said transfer service processing section constitute a road-to-vehicle communication protocol for performing road-to-vehicle communication between said mobile stations and said base station; said car-to-car communication transfer service processing section notifies said on-board communication device on said receiving side of communication control information of said car-to-car communication management service processing section; and said on-board communication device on said receiving side transmits, in said car-to-car communication transfer service processing section, said communication control information provided to said received messages to said car-to-car communication management service processing section, said received messages being transmitted to said transfer service processing section.