METHOD AND APPARATUS FOR RESOLVING PROTOCOL-AGNOSTIC SCHEMES IN AN INTERNET PROTOCOL MULTIMEDIA SUBSYSTEM

摘要

A method for use by an I-CSCF (12b) in resolving an address of a message according to SIP but using a protocol-agnostic scheme, the method including: a step (32) of querying a data store (12c) of scheme mappings in response to receiving such the message, the querying for determining possible mappings to trial schemes at least one of which resolves the address, i.e. which can be used by the I-CSCF (12b) to find the S-CSCF (12e) for the target user (11b) if the target user is an IMS client or for forwarding to a gateway or next hop in the path to the target user if the target user is not an IMS client; and a step (33) of testing in turn each possible trial scheme, the testing based on comparing an address using the trial scheme with an address in a data store (12d) of addresses.