Patent ID: 8848604

Claim:
A system comprising: a text message gateway configured to interwork communications between a text message application and a packet-switched network that uses Session Initiation Protocol (SIP); the text message gateway further configured to receive a first delivery request from the text message application that includes an Application Originated (AO) text message intended for User Equipment (UE) being served by the packet-switched network, to generate a correlation identifier (ID) that uniquely references the AO text message, to insert the correlation ID that uniquely references the AO text message in a delivery response, and to transmit the delivery response to the text message application; the text message gateway further configured to convert the first delivery request into a first SIP request that encapsulates the AO text message, to insert the correlation ID that uniquely references the AO text message in the first SIP request, and to transmit the first SIP request to the UE; the text message gateway is further configured to receive a second SIP request from the UE that includes a delivery report indicating a status for delivering the AO text message to the UE, to parse the second SIP request to identify the correlation ID, and to correlate the second SIP request with at least one of the first SIP request and the first delivery request based on the correlation ID.