Autonomous maximum power setting based on channel fingerprint

摘要

A home base station (HBS) (104, 801) performs radio channel measurements to detect one or more user equipments (UEs) (107) not served by the HBS which may be in a potentially interfering environment caused at least in part by the HBS. A database (812) of historical channel data (channel fingerprinting) of the HBS coverage area is used to predict the channel conditions and expected interference signal power seen by the detected UE(s). Based on a combination of the radio measurements (813) and historical channel data, the HBS can accurately and adaptively reduce its transmit power to a level that reduces or eliminates interference with the detected UE(s), while also not significantly degrading communication quality between other UEs served by the HBS.

主权项

1. A method in a first radio network node (HBS) transmitting a radio signal at a first output power level in a first cell, the method comprising the steps of:
performing one or more radio measurements in the first cell on an uplink (UL) radio signal transmitted by one or more user equipments (UEs) served by a second radio network node and on a downlink (DL) radio signal transmitted by the second radio network node, identifying one of the one or more UEs served by the second radio network node that experiences interference from a DL transmission from the first radio network node based on the one or more performed radio measurements, estimating an interference experienced by the identified UE caused by the DL transmission from the first radio network node based on the one or more performed radio measurements, and modifying the first output power level of the first radio network node based on the estimated interference to reduce the interference from the first radio network node experienced by the identified UE.