Patent ID: 8483700

Claim:
A method for allocating a channel by using wireless access in a vehicular environment in which an onboard unit is provided in a vehicle and at least one roadside unit is provided, comprising: the onboard unit receiving a service announcement message from the at least one roadside unit; generating an available service table by using the service announcement message; determining whether the available service table includes a plurality of roadside unit entries for transmitting the service announcement message; when the available service table includes a plurality of roadside unit entries, selecting a roadside unit to access by comparing average received signal strength indication (RSSI) for the roadside units included in the available service table; selecting a channel that corresponds to a service provider ID with the highest priority from among the services provided by the selected roadside unit; and allocating the selected channel as a service channel, and exchanging information with the roadside unit based on the service channel, wherein the generating of the available service table further includes updating the available service table with the service that corresponds to the service provider ID based on information on the service desired by the user of the onboard unit.