SUPERORDINATE BASE STATION, SUBORDINATE BASE STATION, AND RADIO COMMUNICATION SYSTEM

摘要

A superordinate base station, a subordinate base station with control functionality that is more limited than the control functionality of the superordinate base station, a user device that can communicate by radio with the superordinate base station and with the subordinate base station, a switching center, and a gateway device are provided. The superordinate base station has interfaces for control-plane communication and a transceiving unit that performs transceiving with the subordinate base station through an X3 interface. The subordinate base station has an interface for user-plane communication and an X3 interface for communication with the superordinate base station. Operations of the subordinate base station are controlled by control messages transmitted from the superordinate base station.

主权项

1. A superordinate base station in a radio communication system, the radio communication system comprising:
the superordinate base station; a subordinate base station in which control functionality is more limited than control functionality of the superordinate base station; a user device that communicates by radio with each of the superordinate base station and the subordinate base station; a switching center; and a gateway device, the subordinate base station having neither an interface for control-plane communication with the user device nor an interface for control-plane communication with the switching center, the superordinate base station having: a Uu-C interface for control-plane communication with the user device; an X3 interface for at least one of control-plane communication and user-plane communication with the subordinate base station; an S1-MME interface for control-plane communication with the switching center; and a transceiving unit that performs transceiving with the subordinate base station through the X3 interface.