Patent ID: 7343161

Claim:
A method for setting up a real time data call in a mobile communication system, comprising: setting up a control path between an origination base station controller (BSC), a termination BSC and a mobile switching center (MSC) controlling the origination and termination BSCs when a call is set up between an origination side mobile station and a termination side mobile station; transferring bearer information between the origination BSC and the termination BSC through the set up control path, wherein transferring bearer information comprises: sending a request from the origination BSC to the MSC along the control path for Connection Management service carrying required information, for setting up a radio link with the origination side mobile station upon reception of a call set up message from the origination side mobile station, sending a request from the MSC to the termination BSC along the control path for a termination number for a call, to set up a radio link between the termination BSC and the termination side mobile station, and transferring bearer information of the termination BSC to the origination BSC along the control path, and transferring a response to the bearer information from the origination BSC to the termination BSC along the control path, to form the bearer path; setting up the bearer path between the origination BSC and the termination BSC by using the bearer information transferred along the control path; and transferring real time video data of at least one of the origination side mobile station and the termination side mobile station between the origination BSC and the termination BSC through the set up bearer path without using traffic resources of the MSC.