Patent ID: 8817956

Claim:
A method for a service access of a user in an Access Gateway Control Function, AGCF, entity, wherein a corresponding relationship between a logic number of the user and a physical number of the user in the AGCF entity is stored in a Home User Server, HSS, the method comprising: acquiring by the AGCF entity, in a registration process initiated by the user, the corresponding relationship between the physical number of the user and the logic number of the user from the HSS and storing it by the AGCF; and acquiring by the AGCF entity, in a calling process of the user, the logic number of the user by using the stored corresponding relationship between the physical number and the logic number and implementing a service access for the user by the AGCF entity, wherein the physical number of the user is a number corresponding to the user line, which is allocated to the user line in the AGCF entity during networking, and which can be permanently used by the user and is invisible to the user; the logic number of the user is a number allocated to the user during number allocation and is known to the user.