Patent ID: 7079519
Filing Date: 2006-07-18
Classification: H04W

Abstract:
1. A method of establishing a packet data path in a packet switching network having a UTRAN (UMTS Terrestrial Access Network) connected to an MS (Mobile Station), an RNC (Radio Network Controller) included in the UTRAN, an SGSN (Serving GPRS Support Node) server connected to the RNC for processing first control information received from the MS through the RNC, an S-MGW (SGSN-Media Gateway) connected to the RNC for switching packet data received from the MS, a GGSN (Gateway GPRS Support Node) connected to the SGSN server for processing second control information resulting from processing the first control information, and a G-MGW (GGSN-MGW) connected to the S-MGW for switching the packet data, the method comprising the steps of: transmitting a first message requesting PDP (Packet Data Protocol) context activation included in the first control information from the MS to the SGSN server; transmitting a second message representative of a switching path for the S-MGW from the SGSN server to the S-MGW to establish a forward transmission path for transmitting the packet data between the S-MGW and the G-MGW; transmitting a response message for the second message from the S-MGW to the SGSN server; transmitting a third message requesting PDP context creation from the SGSN server to the GGSN server in response to the response message for the second message; transmitting a fourth message representative of a switching path for the G-MGW from the GGSN server to the G-MGW to establish a reverse transmission path for transmitting the packet data between the G-MGW and the S-MGW; transmitting a response message for the fourth message from the G-MGW to the GGSN server; transmitting a response message for the third message from the GGSN server to the SGSN server in response to the response message for the fourth message; establishing the reverse transmission path for the S-MGW by the response message of the third message by the SGSN server; and transmitting a message indicating completed establishment of the forward and reverse transmission paths from the SGSN server to the MS.