Patent ID: 8958319
Filing Date: 2015-02-17
Classification: H04B

Abstract:
1. A method implemented by a base station for handling interference in a wireless communication system that operates according to a synchronised time division duplex scheme, the method comprising: transmitting from the base station a frame that is a sounding frame, wherein a frame comprises a downlink time interval of variable size and variable end position, an uplink time interval, and a guard period between the downlink time interval and uplink time interval, said guard period having a size adaptive to the size of the downlink time interval and starting at the end position of the downlink time interval, wherein the sounding frame includes a downlink time interval that has a pre-defined size long enough to provoke interference with another base station, measuring, by the base station, a link quality data parameter in a non-downlink time interval of the sounding frame, or of a frame following the sounding frame according to a frame structure used by the wireless communication system that includes a plurality of frames that follow one after another in time, determining, by the base station and based on said link quality data parameter, whether interference from another base station is present, and when interference from another base station is present according to said determining, reducing, by the base station, the size of variable downlink time intervals that follow the sounding frame, according to an interference reduction scheme for obtaining downlink time intervals with a guaranteed reduced size.