RADIO COMMUNICATION SYSTEM, BASE STATION, AND COMMUNICATION CONTROL METHOD

摘要

Downlink reception power from a second base station is adjusted upward using a cell range expansion offset value. Based on the downlink reception power, a connection destination base station for a user device is selected. A parameter for calculating a target uplink reception characteristic at the second base station is set according to the cell range expansion offset value corresponding to the second base station. Based on the parameter, the target uplink reception characteristic of radio waves from the user device is calculated. Uplink transmission power of the user device is controlled so that an uplink reception characteristic of radio waves from the user device approaches the target uplink reception characteristic.

主权项

1. A radio communication system comprising:
base stations comprising a first base station that forms a first cell and a second base station that forms a second cell that is smaller in area than the first cell; a user device configured to communicate wirelessly with each of the base stations by transmitting and receiving radio waves; a downlink reception power adjusting unit configured to adjust downlink reception power from the second base station at the user device upward using a cell range expansion offset value corresponding to the second base station; a connection destination selecting unit configured to select, based on downlink reception power from the first base station and the downlink reception power from the second base station that has been adjusted with the cell range expansion offset value, a connection destination base station for the user device; a target uplink reception characteristic calculating unit configured to calculate a target uplink reception characteristic of radio waves from the user device at at least one base station that is comprised in the base stations; a parameter setting unit configured to set, according to the cell range expansion offset value corresponding to the second base station, a parameter for calculating a target uplink reception characteristic at the second base station; and a transmission power control unit configured to control uplink transmission power of the user device so that an uplink reception characteristic of radio waves from the user device at the at least one base station approaches the target uplink reception characteristic.