Methods And Arrangements For Performing Cell Measurements In A Cellular Communication System Having Multiple Antenna Ports

A method in a network node of a cellular communication system for receiving cell measurement results, comprising:

• receiving a measurement report message from a user equipment, UE, which message comprises a cell measurement result based on a performed cell measurement on one or more transmit antenna ports at a neighbouring cell and information indicating the one or more transmit antenna ports on which the cell measurement was performed;
• interpreting said cell measurement result and said information indicating the one or more transmit antenna ports;
• and
• determining an accuracy of said cell measurement result based on said one or more transmit antenna ports.

An arrangement adapted to be used in a user equipment, UE, adapted to be used in a cellular communication system for reporting cell measurement results from the UE via a radio interface between the UE and a network node in a cell serving the UE, the arrangement comprising:

• a unit for detecting one or more transmit antenna ports at a neighbouring cell,
• a unit for performing cell measurement on at least one detected transmit antenna port,
• a unit for generating a measurement report message comprising a cell measurement result based on the performed cell measurement and information indicating the one or more transmit antenna ports on which the cell measurement was performed, and
• a transmitter for sending the measurement report message to said network node.

An arrangement adapted to be used in a network node of a cellular communication system for receiving cell measurement results, the arrangement comprising:

• a receiver for receiving a measurement report message from a user equipment, UE, which message comprises a cell measurement result based on a performed cell measurement on one or more transmit antenna ports at a neighbouring cell and information indicating the one or more transmit antenna ports on which the cell measurement was performed;
• a unit for interpreting said cell measurement result and said information indicating the one or more transmit antenna ports;
• and
• a unit for determining an accuracy of said cell measurement result based on said one or more transmit antenna ports.