Patent ID: 8195154

Claim:
A method for implementing terminal roam and roam management under a soft switch architecture, for implementing the roam and roam management of a Next Generation Network (NGN) terminal, comprising the steps of: step 1, a user terminal moving in an Internet Protocol (IP) network, and when an IP address of the user terminal changes, the user terminal registering at a soft switch controlling device; step 2, the user terminal attaining the IP address of the soft switch controlling device, and then sending a register request to the soft switch controlling device; step 3, after receiving the register request of the user terminal, the soft switch controlling device attaining user data of the user terminal from a database, wherein the database is a database server group, the step of attaining user data of the user terminal from a database comprising one database server in the database server group searching for the user data, and if the database server finds no user data of the user terminal, the database server attaining the user data of the user terminal from another database server in the database server group by the database interconnecting protocol; step 4, the soft switch controlling device judging whether the user terminal is roaming, and if it is roaming, the soft switch controlling device further determining whether to allow the user terminal to access; and step 5, if the user terminal is roaming and being allowed to access, the soft switch controlling device sending a register success response to the user terminal, and the user terminal accessing the soft switch controlling device successfully.