SHORT MESSAGE SERVICE MOBILE ORIGINATED/MOBILE TERMINATED WITHOUT MOBILE STATION INTERNATIONAL SUBSCRIBER DIRECTORY NUMBER (MSISDN) IN INTERNET PROTOCOL MULTIMEDIA SUBSYSTEM (IMS)

摘要

A method, comprising storing, by a gateway, at least one of a session initiation protocol uniform resource identifier and international mobile subscriber identity of a device sending a short message service message; receiving the short message service message from the sending device; retrieving a session initiation protocol uniform resource identifier for a receiving device that is a recipient of the short message service message, wherein the session initiation protocol uniform resource identifier of the receiving device is retrieved from a "to header" of the short message service message; querying a home subscription server of the receiving device for the international mobile subscriber identity and routing information of the receiving device; and delivering the short message service message to the receiving device using the international mobile subscriber identity and the routing information, wherein at least one of the sending device and the receiving device do not have a mobile station international subscriber directory number.