Patent ID: 9100905
Filing Date: 2015-08-04
Classification: H04W

Abstract:
1. A mobile communication method comprising: acquiring, by an exchange, in a communication start procedure of mobile station camps on a femtocell, a frequency of the femtocell and a femtocell ID for uniquely identifying the femtocell which are held in a controller; storing, by the exchange and a home location register, the acquired frequency of the femtocell and the acquired femtocell ID in association with subscriber information of a mobile station; judging, by the controller, whether the communication start procedure by the mobile station is performed through the femtocell or through a macrocell; transmitting a location registration request signal to the exchange by the controller when the communication start procedure is performed through the femtocell, the location registration request signal having been transmitted from the mobile station visiting the macrocell through a radio connection established with the mobile station; performing, by the exchange and the home location register, location registration to register the mobile station for a location registration area to which the femtocell geographically overlaid with the macrocell belongs, in response to the received location registration request signal; notifying, by the exchange, in a release procedure of the radio connection after completion of the location registration, the controller of the frequency of the femtocell, and notifying, by the controller, in the release procedure, the mobile station of the notified frequency of the femtocell; and starting, by the mobile station, camps on the notified frequency of the femtocell, wherein, in the communication start procedure of the mobile station camps, the controller transmits an “INITIAL UE MESSAGE” including the frequency of the femtocell and the femtocell ID to the exchange, and the exchange acquires the frequency of the femtocell and the femtocell ID included in the “INITIAL UE MESSAGE.”