Patent ID: 8041349
Filing Date: 2011-10-18
Classification: H04L,H04W

Abstract:
1. A home subscriber server configuration method in an IP network for achieving an IMS (IP Multimedia Subsystem) architecture, wherein a plurality of home subscriber servers (HSS servers) are provided for storing user information of user equipment and information for selecting call session control server (S-CSCF server) that administrates call session control, the plurality of HSS servers are in a redundant configuration for respective areas, and a particular HSS server to be accessed by an inquiry session control server (I-CSCF server) to determine the S-CSCF server to register a new user equipment or the S-CSCF server is determined by sending an interrogation from the I-CSCF server or the S-CSCF server to a subscriber locator server (SLF server) that stores a correspondence between the plurality of HSS servers and user equipment, comprising the steps of: synchronizing the information to be stored in the plurality of HSS servers in the redundant configuration; and sending by the SLF server that receives the interrogation from the I-CSCF server or the S-CSCF server access information corresponding to the interrogation for the plurality of HSS servers back to the I-CSCF server or the S-CSCF server from which the interrogation is originated, wherein in case of sending the access information corresponding to the interrogation back to the plurality of HSS servers, the SLF server rearranges in accordance with the predetermined order of priority before sending back.