Patent ID: 7715839

Claim:
A method of controlling the roam of a terminal user in a NGN network system, and the NGN network system comprises a core control device based on a packet switched data network and mobile terminals, characterized in that the method comprises the following steps: step 1, dividing regions in accordance with IP address field; step 2, setting the roam attribute of each IP address field in each of the regions to which a terminal user roams, and the roam attribute including a roam type and a service attribute; step 3, setting the roam right of a terminal user in the core control device according to the roam type set in the core control device such that each roam type corresponds to a roam right; step 4, when the terminal registers with the core control device from a region, the IP address of the terminal being uploaded to the core control device, and if the IP address does not exist in the core control device, the registration failing; if the IP address is in the core control device, the core control device obtaining the roam type corresponding to the terminal in accordance with the IP address of the terminal; and step 5, further judging whether the terminal user has the roam right of this roam type, if positive, the terminal user registering successfully, otherwise failing; and when the terminal user registers successfully, the terminal user is able to use the network service in the corresponding region.