TAE/FAE Compensation for Antenna Ports in CoMP Transmission

A user equipment (UE), comprising:

• a first measuring unit adapted to measure at least one of time alignment error (TAE) and frequency alignment error (FAE), for antenna ports belonging to transmission point devices in Coordinated Multipoint Transmission (CoMP), the TAE including at least one of internal TAE and external TAE;
• and
• a first feedback unit adapted to feed back at least one of the measured internal TAE, the measured external TAE, and the measured FAE, to at least one of the transmission point devices.

A transmission point device for compensating at least one of time alignment error (TAE) and frequency alignment error (FAE), for antenna ports belonging to transmission point devices in Coordinated Multipoint Transmission (CoMP), the TAE including at least one of an internal TAE and an external TAE, and wherein the transmission point device comprises:

• a receiving unit adapted to receive at least one of internal TAE measurements, external TAE measurements, and FAE measurements, from one or more user equipments (UEs);
• and
• a compensating unit adapted to compensate for at least one of the internal TAE, the external TAE, and the FAE, for respective antenna ports, on the basis of any one or more of the received internal TAE measurements, the received external TAE measurements, and the received FAE measurements.

A method for use in a user equipment (UE), comprising:

• measuring at least one of time alignment error (TAE) and frequency alignment error (FAE), for antenna ports belonging to transmission point devices in Coordinated Multipoint Transmission (CoMP), the TAE including at least one of internal TAE and external TAE;
• and
• feeding back at least one of measured internal TAE, the measured external TAE, and the measured FAE, to at least one of the transmission point devices.

A method for compensating for at least one of time alignment error (TAE) and frequency alignment error (FAE), for antenna ports belonging to transmission point devices in Coordinated Multipoint Transmission (CoMP), the TAE including at least one of internal TAE and external TAE, and the method performed by a transmission point device and comprising:

• receiving one or more of internal TAE measurements, external TAE measurements, and FAE measurements from one or more user equipments (UEs);
• and
• compensating at least one of the internal TAE, the external TAE, and the FAE for respective antenna ports, on the basis of any one or more of the received internal TAE measurements, the received external TAE measurements, and the received FAE measurements.