INTERFERENCE REDUCTION METHOD, RADIO BASE STATION, USER TERMINAL AND RADIO COMMUNICATION SYSTEM

摘要

A method to reduce interference between a macro cell and a small cell in a radio communication system in which the macro cell and the small cell are allocated to overlap at least in part is disclosed. The interference reduction method includes the steps in which a small base station transmits macro cell identification information that identifies the macro cell, to a user terminal in a small cell, allocates a downlink control signal for the user terminal to a radio resource unit having a different index number from that of a radio resource unit where a downlink control signal to be transmitted from the macro base station is allocated, and interleaves the downlink control signal for the user terminal using an interleaving pattern that is generated based on the macro cell identification information and that is the same as an interleaving pattern used in macro base station.

主权项

1. An interference reduction method in a small base station that forms a small cell so that at least part of the small cell overlaps with a macro cell that is formed by a macro base station, the interference reduction method comprising the steps of:
transmitting macro cell identification information that identifies the macro cell, to a user terminal in the small cell; allocating a downlink control signal for the user terminal to a radio resource unit having a different index number from that of a radio resource unit where a downlink control signal to be transmitted from the macro base station is allocated; and interleaving the downlink control signal for the user terminal using an interleaving pattern that is generated based on the macro cell identification information and that is same as an interleaving pattern used in the macro base station.