Patent ID: 8918125

Claim:
A method for short message signaling intercommunication, comprising: step 21 , receiving a first route request message from a Short Message Service Center (SMSC) of a sending network by an SMSC of a receiving network, wherein the first route request message includes a mobile directory number of a receiving terminal; step 22 , inquiring of a Number Portability Data Base (NPDB) about a current home network of the receiving terminal by the SMSC of the receiving network, according to the mobile directory number of the receiving terminal; and step 23 , transmitting a second route request message to a Home Location Register (HLR) of the current home network of the receiving terminal by the SMSC of the receiving network; and transmitting a Mobile Terminal (MT) message to a Mobile Switching Center (MSC) of the current home network by the SMSC of the sending network; wherein if the current home network of the receiving terminal is the receiving network, the step 23 specifically is: the SMSC of the receiving network transmits a second route request message to an HLR of the receiving network, wherein the second route request message includes the mobile directory number of the receiving terminal; the SMSC of the receiving network receives a first route response message from the HLR of the receiving network, wherein the first route response message includes an MSC address of the current home network corresponding to the receiving terminal; the SMSC of the receiving network transmits a second route response message to the SMSC of the sending network, wherein the second route response message includes an address of the SMSC of the receiving network in the sending network; and the SMSC of the sending network transmits the MT message to the SMSC of the receiving network according to the address; the SMSC of the receiving network receives the MT message from the SMSC of the sending network; and the SMSC of the receiving network transmits the MT message to an MSC of the receiving network.