Patent ID: 8649323

Claim:
A logical interface establishing method, comprising: by a new radio base station which is installed in a network, advertising an IP address of the new radio base station over a transport network; by an existing radio base station or a Mobility Management Entity/User Plane Entity (MME/UPE) which receives the IP address, detecting the number of hops from the new radio base station to the existing radio base station or the MME/UPE; establishing an X2 interface between the existing radio base station and the new radio base station and establishing an S1 interface between the MME/UPE and the new radio base station, when the detected number of hops is below a predetermined threshold; by the new radio base station, receiving logical interface information retained by the existing radio base station or the MME/UPE after the X2 interface and the S1 interface are established; and by the new radio base station, selecting a predetermined number of existing radio base stations which frequently appear in neighboring list information included in the logical interface information, when the logical interface information is received from one or more existing radio base stations or one or more MMEs/UPEs; by multiple MMEs/UPEs, configuring a pool; and by one of the MMEs/UPEs within the pool, transmitting a list of other MMEs/UPEs within the pool to the new radio base station and instructing the other MMEs/UPEs to establish additional logical interfaces with the new radio base station, when the IP address of the new radio base station is received by the one of the MMEs/UPEs.