Uplink power control using beamforming to compensate for path loss
AssigneeHTC Corporation
InventorLing-San Meng
Life of this patent
Estimating the term…
Abstract
The technique of beamforming is to be adopted in 5G NR systems in both DL and UL directions to combat the effect of acute path loss in the Giga hertz frequency region. With beamforming, the measured path loss in the UL and DL directions will be different even if the same carrier frequency is used for both DL and UL, due to the fact that the antenna gains are not unity as in the case in LTE/LTE-A systems. In view of this, embodiments of the present invention provide method and apparatus to handle the mechanism of UL transmit power control.
Claims18
A method for a user equipment (UE) to perform uplink transmit power control, comprising:
- receiving, from a base station, a control information comprising at least an antenna configuration;
- determining uplink transmit power of at least one uplink signal based on at least the control information, comprising:
- determining a closed-loop (CL) power control parameter according to the antenna configuration, comprising:
- calculating a gain difference between a transmit antenna gain and a receive antenna gain of the base station according to the antenna configuration;
- determining an open-loop (OL) power control parameter according to the antenna configuration;
- and
- determining a pass loss parameter according to the antenna configuration;
- and
- transmitting the at least one uplink signal with the determined uplink transmit power to the base station.
A user equipment (UE), comprising:
- a communication interfacing unit, arranged to receive, from a base station, a control information comprising at least an antenna configuration;
- a storage unit, arranged to store program code;
- and
- a processing circuit, arranged to execute the program code thereby to perform steps of determining uplink transmit power of at least one uplink signal based on at least the control information, wherein the communication interfacing unit is arranged to transmit the at least one uplink signal with the determined uplink transmit power to the base station;
- and the processing circuit is arranged to execute the program code thereby further to perform at least one step of:
- determining a closed-loop (CL) power control parameter according to the antenna configuration based on calculating a gain difference between a transmit antenna gain and a receive antenna gain of the base station according to the antenna configuration;
- determining an open-loop (OL) power control parameter according to the antenna configuration;
- and
- determining a pass loss parameter according to the antenna configuration.
Dependencies are inferred from the claim text.