Radio Base Station, Radio Network Node and Methods Therein for Detecting a Faulty Antenna

A method in a first radio base station for enabling detection of a faulty antenna in a radio communications network, which radio communication network comprises the first radio base station, providing radio coverage in a first cell, and a second radio base station providing radio coverage in a second cell, the method comprising:

• receiving, from at least one user equipment in the first cell, a first set of measurement reports over a first period of time, at least some of the measurement reports indicating a cell relation between the first cell and the second cell;
• forming reference statistics of the cell relation between the first cell and the second cell, based on the first set of measurement reports;
• receiving, from at least one user equipment in the first cell, a second set of measurement reports over a second period of time;
• forming current statistics of the cell relation between the first cell and the second cell based on the second set of measurement reports;
• and
• comparing the current statistics with the reference statistics to enable the detection of a faulty antenna in the first radio base station or the second radio base station.

A first radio base station for enabling detection of a faulty antenna in a radio communications network, which first radio base station is arranged to provide radio coverage in a first cell, the first radio base station comprising:

• at least one antenna providing the radio coverage in the first cell;
• a receiver configured to receive, from at least one user equipment in the first cell, a first set of measurement reports over a first period of time, at least some of the measurement reports indicating a cell relation between the first cell and a second cell having radio coverage provided by a second radio base station in the radio communications network, and to receive, from at least one user equipment in the first cell, a second set of measurement reports over a second period of time;
• a forming circuit configured to form reference statistics of the cell relation between the first cell and the second cell based on the first set of measurement reports, and to form current statistics of the cell relation between the first cell and the second cell based on the second set of measurement reports;
• and
• a comparing circuit configured to compare the current statistics with the reference statistics to enable the detection of a faulty antenna in the first radio base station or the second radio base station.