Method, system and equipment for implementing USSD service in CDMA network

A system for implementing an Unstructured Supplementary Service Data, USSD, service in a Code Division Multiple Access, CDMA, network, comprising:

• a Mobile Switching Center, MSC, a Service Control Point, SCP, and a Short Message Service Center, SMSC;
• wherein,
• the MSC is configured to transmit an origination request, ORREQ, message carrying a user identification and a USSD access code to the SCP according to a queried mobile intelligent subscription information of a Mobile Station, MS, when receiving a call request carrying the USSD access code transmitted by the MS;
• the SCP is configured to start up a USSD service operation process according to the USSD access code carried in the received ORREQ message, determine an operation type code of a current step according to the user identification and the USSD access code, and perform a corresponding operation according to the operation type code of the current step;
• and construct short message content associated with the operation type code of the current step, and transmit the constructed short message content and a short message type identification to the SMSC;
• and
• the SMSC is configured to transmit the short message content to the MS by way of a flash message indicated by the short message type identification.

A device for implementing an Unstructured Supplementary Service Data, USSD, service in a Code Division Multiple Access, CDMA, network, comprising:

• a startup unit, a determination unit, a processing unit and a transmitting unit;
• wherein,
• the startup unit is configured to receive an origination request, ORREQ, message carrying a user identification and a USSD access code transmitted by a Mobile Switching Center, MSC, and start up a USSD service operation process according to the USSD access code carried in the received ORREQ message;
• the determination unit is configured to determine an operation type code of a current step according to the user identification and the USSD access code;
• the processing unit is configured to perform a corresponding operation according to the operation type code of the current step;
• and
• the transmitting unit is configured to construct short message content associated with the operation type code of the current step, transmit the constructed short message content and a short message type identification to the SMSC, wherein the short message type identification indicates transmitting the short message content by way of a flash message.