Distributed antenna system, allocation of distributed antennas, base station

摘要

In the case where a base station other than of a distributed antenna system provides a time or frequency at which a transmitted power is low, an antenna group configuration unit estimates a communication area of a mobile station using an uplink reference signal that the mobile station transmits, calculates an inter-system interference power for the communication area of each mobile station based on a received power of the out-of-system base station that the each mobile station reports, calculates the inter-system interference power to each of antennas by averaging the inter-system interference powers that the multiple mobile stations report, and decides antennas that form an antenna group according to magnitudes of the calculated inter-system interference powers.

主权项

1. A distributed antenna system, comprising:
a plurality of antennas; and a base station for transmitting or receiving a signal by the antennas, forming a plurality of antenna groups, and deciding a single antenna or antennas that form the each antenna group; wherein when an other base station other than the base station included in the distributed antenna system provides a time or frequency at which a transmitted power is reduced or zero among of time or frequency resources, the base station estimates the antennas in a communication area of each mobile station using received powers of an uplink reference signal transmitted by each mobile station, calculates interference powers from the other base station to the mobile stations in the communication area of the antennas based on received powers of a downlink reference signal transmitted from the other base station that respective mobile stations report, calculates a first interference power from the other base station to the communication area of respective antennas by averaging the interference powers from the other base station that the mobile stations report, decentralizes a single or a plurality of antennas at which the first interference power is relatively high into different antenna groups according to magnitudes of the calculated first interference power, and decides the antennas that form the antenna group by combining the antenna(s) with a single antenna or antennas at which the first interference power is relatively low.