Patent ID: 8515447

Claim:
A method for switching service channels in a vehicular environment for performing communications between a user unit and a service provider unit according to a switch ratio between a service channel and a control channel in a multi-channel switching wireless communication environment, the method comprising: in response to a message indicating that the service provider unit uses an access mode of an extended service channel, searching whether the information of the switch ratio is stored in service information of the user unit according to geographical information of the service provider unit; setting the user unit to enter the access mode of the extended service channel if the information of the switch ratio is stored in the service information of the user unit in the searching step; sending a request message by the user unit to request the service provider unit to provide the information of the switch ratio if the service information of the user unit does not include the information of the switch ratio in the searching step; in response to a message indicating the information of the switch ratio, setting the user unit to enter the access mode of the extended service channel to extend service channel access; and recording the information of the switch ratio and the geographical information of the service provider unit in the service information of the user unit.