PROBLEM TO BE SOLVED: To provide a short message service method and its system, among the private radio network systems of a multizone.;SOLUTION: This short message service method and its system, among the private radio network systems of a multizone grasp by using synchronized HLR information (subscriber information), that in a service area of which private radio network system each receiving terminal is located, by periodically updating and making the HLR information synchronized to interlock it among the private radio network systems of the multizone, when the private radio network systems, existing separately are formed by one service area called a multizone, request a call processing module pBSC of a corresponding private radio network system to perform SMS transmission, and perform message transmission to a corresponding terminal.;COPYRIGHT: (C)2005,JPO&NCIPI
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