This invention relates to a network side activation method for reducing user redundant data in mobile communication, which increases signaling between Gc interfaces of GGSN and HLR to get the MS information requirement and MS information response, if GGSN does not support the Gc interface, the signaling interacts between GGSN and MAP GSN by the communication of MPN GSN and HLR. When the GGSN trigger network side is activated and needs to look for the corresponding IMSI user information of the MS IP, the GGSN sends the signaling to HLR carrying the MS IP, HLR feeds back the result to GGSN based on the related user information inquired by MS IP GGSN continues the PDP activation flow. |