RADIO BASE STATION, USER TERMINAL, CELL SELECTION METHOD AND RADIO COMMUNICATION SYSTEM

摘要

A system in which user terminal is able to aggressively select small cells in a radio communication system in which a macro cell and small cells are arranged to overlap each other is disclosed. A macro base station (M) configured to form a macro cell carries out the steps of determining the offset value to use in cell selection in a user terminal (UE) based on transmission property information of a second carrier in the small cell, and reporting the offset value to the user terminal (UE). Also, the user terminal (UE) carries out the steps of measuring the received quality of reference signals from the macro base station (M) and the small base station (S), receiving the offset value that is reported from the macro base station (M), and carrying out cell selection based on the received quality that is measured and the offset value that is received.

主权项

1. A radio base station that forms a first cell in a radio communication system in which the first cell that uses a first carrier and a second cell that uses a second carrier of a higher frequency band than the first carrier are arranged to overlap each other, the radio base station comprising:
a determining section that determines an offset value to use in cell selection in a user terminal, based on transmission property information of the second carrier in the second cell; and a reporting section that reports the offset value to the user terminal.