Patent ID: 6785544
Filing Date: 2004-08-31
Classification: H04M,H04W

Abstract:
A call processing method in a mobile communication system which includes an origination MSC, an origination VLR, an origination HLR, a target MSC and a target HLR, the method comprising the steps of:a) receiving a number of the called subscriber from a calling subscriber; b) in the origination MSC, receiving location information and the number of called subscriber; c) in the origination MSC, reading and analyzing the calling subscriber information stored in the origination VLR; d) in the origination MSC, determining whether the calling subscriber is a home-zone service subscriber; e) if the calling subscriber is a home-zone service subscriber, transmitting present location information of the calling subscriber to the origination HLR, from the origination MSC; f) in the origination HLR, determining whether the present location of the calling subscriber is within a pre-registered area; g) if the calling subscriber is within the pre-registered area, applying the origination MSC a discount in accounting according to home-zone service to the accounting information; h) in the origination MSC, performing a call setup operation in order to allow conversation between the calling subscriber and the called subscriber, i) if the present location of the calling subscriber is within a pre-registered area transmitting from the origination HLR announcement comment for the home-zone service or a tone code to the mobile station; and j) if the calling subscriber is not a home-zone subscriber or the present location of the calling subscriber is not pre-registered area, in the origination MSC, a call setup operation in order to allow conversation between the calling subscriber and the called subscriber without discount, wherein the step j) includes the steps of: j1) determining in the origination MSC if the calling subscriber is call restricted subscriber; j2) if it is determined that the calling subscriber is not a call restricted subscriber, determining in the origination MSC if the number of the called subscriber inputted by the calling subscriber is a mobile subscriber number; j3) if the number of the called subscriber inputted by the calling subscriber is a mobile subscriber number, at the origination MSC, requesting the routing information about the called subscriber from the target HLR; j4) transmitting from the target HLR the routing information about the called subscriber to the origination MSC; j5) upon analyzing the routing information about the called subscriber, determining in the origination MSC whether the target MSC exists to which the called subscriber belongs; and j6) if it is determined that the target MSC for the called subscriber exists, setting up in the origination MSC a call to the target MSC allowing the calling subscriber and the called subscriber to proceed a conversation between them.