Patent ID: 9060035
Filing Date: 2015-06-16
Classification: H04L

Abstract:
1. A method for determining a called party home domain comprising: partitioning a national subscriber profile covering a geographic area into a plurality of regions, each of the plurality of regions designated as internet multimedia subsystem serving area; receiving a request, at a network component, from a calling party to establish communication with a called party of a plurality of parties, each of the plurality of parties associated with a respective internet multimedia subsystem serving area; determining a name authority pointer associated with the called party by querying a local copy of a telephone numbering database in a home domain of the calling party based on the request, the name authority pointer comprising data identifying the called party home domain and a region of the plurality of regions of the national subscriber profile in which the called party is located; determining a domain name of a device located in the called party home domain identified in the name authority pointer; determining an internet protocol address of the device located in the called party home domain identified in the name authority pointer based on the domain name; and transmitting a request to the called party home domain based on the internet protocol address of the device located in the called party home domain.