Patent ID: 7801539

Claim:
A method for delivering a short message from a foreign mobile network to a user or application server in a home mobile network, the home and foreign networks operating with non-compatible protocols, the method comprising the steps of: an SMSC of the foreign network querying a pseudo HLR in the home network, said pseudo HLR operating with the protocol of the foreign network, to determine a serving MSC; the pseudo HLR providing to the foreign network SMSC an address of a pseudo MSC in the home network, said pseudo MSC operating with the protocol of the foreign network; the foreign network SMSC routing the message to the pseudo MSC, wherein the pseudo MSC terminates the message delivery attempt by sending an acknowledgement to the foreign network SMSC; a mobile network node in the home network performing protocol conversion of the message to an access protocol and routing the message using said access protocol to a receiving node in the home network; the receiving node is a home network SMSC and the method comprises the further step of the home network SMSC routing the message to a destination user or application server; the mobile network node operates as a pseudo SMSC adapted to operate with the protocol of the foreign network when communicating with the foreign network and with an access protocol when communicating with elements of the home network, and said pseudo SMSC sends the message to the home network SMSC using the access protocol; and the pseudo SMSC, in case of delivery failure due to a temporary condition, performs a retry of sending the message to the receiving node and receives a delivery acknowledgement.