User authentication system and method for supporting terminal mobility between user lines

摘要

Provided is a user authentication system and method for supporting terminal mobility between user lines. The user authentication system includes: a binding checker that checks whether a user terminal ID and a circuit ID of a line currently connected to the user terminal are bound; a terminal/circuit information checker that checks whether the user terminal ID and the circuit ID are validly registered for a network service if the check result obtained by the binding checker shows that binding is not made; and a terminal authenticator that authenticates the user terminal by temporarily binding the user terminal ID and the circuit ID if the terminal/circuit information checker confirms validity of the registration. Accordingly, a pre-authenticated user terminal can receive a network service by accessing another user line. Therefore, it is possible to create various business models in which a service and a service fee system are determined according to an end user's SLA.