Patent ID: 9485737
Filing Date: 2016-11-01
CPC Classification: H04W

Claim Text:
1. A method of controlling radio units to transmit a signal to user equipment wherein each one of the radio units includes at least two antennas associated with a different transmission pattern, the method comprising: determining whether user equipment is located at an overlapping cell area of a first cell and a second cell; and when the user equipment is determined as being located in the overlapping cell area, controlling a first radio unit in the first cell to transmit a signal to the user equipment using a first resource block and simultaneously controlling a second radio unit in the second cell to transmit a reference signal associated with the first resource block, wherein the first radio unit is controlled to use a first transmission power to transmit the signal, the second radio unit is controlled to use a second transmission power to transmit the reference signal, and the second transmission power is lower than the first transmission power, and wherein the method further comprises controlling the second radio unit to transmit a reference signal associated with other resource blocks with a third transmission power, wherein the third transmission power is higher than at least one of the second transmission power and the first transmission power.