Patent ID: 8995984
Filing Date: 2015-03-31
Classification: H04W

Abstract:
1. A communication system comprising: a mobile communication network; a fixed communication network connected to the mobile communication network; and a plurality of radio base stations capable of communicating with a mobile terminal by radio communication, wherein the radio base stations include: a first base station connected to the mobile communication network, the first base station being a macrocell base station; and second base stations connected to the fixed communication network through wire communication lines, the second base stations being femtocell base stations; a communication connection using a base station-to-base station logical interface is established between one of the second base stations and a neighboring base station located in a neighborhood of the one of the second base stations, the neighboring base station including the first base station and/or another one of the second base stations, wherein the base station-to-base station logical interface is a same logical interface as a base station-to-base station logical interface used by macrocell base stations to communicate with each other; and a relay apparatus connected between the mobile communication network and the fixed communication network, wherein the second base stations are connected to the mobile communication network through the fixed communication network and the relay apparatus, and wherein, when a communication connection using the base station-to-base station logical interface is established between the relay apparatus and the first base station, the relay apparatus and the second base stations use the base station-to-base station logical interface using a base station-to-upper node logical interface, between the relay apparatus and the second base stations by including a data of the base station-to-base station logical interface in a frame of the base station-to-upper node logical interface.