Patent ID: 7643474
Filing Date: 2010-01-05
Classification: H04L

Abstract:
1. A method for a traditional terminal user to access an IP multimedia subsystem domain, comprising the steps of: an access gateway control function entity allocating an IP multimedia subsystem domain user identification comprising a public identification and a private identification to a traditional terminal user on an access gateway function entity controlled by the access gateway control function entity, and establishing a mapping relation between the IP multimedia subsystem domain user identification and a line identification of the user, the line identification being used for determining the access gateway function entity and port corresponding to the user; and when receiving at least one of a command and a message for a certain user terminal sent from the access gateway function entity, the access gateway control function entity determining the IP multimedia subsystem domain user identification of the user according to the mapping relation and sending a corresponding SIP message to a call session control function entity in the IP multimedia subsystem domain; or when receiving a SIP message sent from the call session control function entity in the IP multimedia subsystem domain, the access gateway control function entity determining the line identification of the user according to the mapping relation and sending a corresponding at least one of a command and a message to the access gateway function entity based on the control protocol of the access gateway function entity, and the at least one of a command and a message being converted into an analog line signaling by the access gateway function entity and being transmitted to the user terminal.