Uplink power control using beamforming to compensate for path loss
First Claim
Patent Images
1. 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 a UE antenna configuration, wherein the UE antenna configuration comprises at least a sounding reference signal resource index (SRI);
receiving a downlink reference signal from the base station;
determining an open-loop (OL) power control parameter according to the UE antenna configuration;
determining a path loss parameter according to the UE antenna configuration and the downlink reference signal;
determining uplink transmit power of at least one uplink signal based on at least one of the control information, the OL power control parameter, and the path loss parameter; and
transmitting the at least one uplink signal with the determined uplink transmit power to the base station.
0 Assignments
0 Petitions
Accused Products
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.
8 Citations
7 Claims
-
1. 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 a UE antenna configuration, wherein the UE antenna configuration comprises at least a sounding reference signal resource index (SRI); receiving a downlink reference signal from the base station; determining an open-loop (OL) power control parameter according to the UE antenna configuration; determining a path loss parameter according to the UE antenna configuration and the downlink reference signal; determining uplink transmit power of at least one uplink signal based on at least one of the control information, the OL power control parameter, and the path loss parameter; and transmitting the at least one uplink signal with the determined uplink transmit power to the base station.
-
-
2. A user equipment (UE), comprising:
-
a communication interfacing unit, arranged to receive, from a base station, a control information comprising at least a UE antenna configuration, wherein the UE antenna configuration comprises at least a sounding reference signal resource index (SRI), wherein the communication interfacing unit is further arranged to receive a downlink reference signal from the base station; a storage unit, arranged to store program code; and a processing circuit, arranged to execute the program code thereby to perform steps of; determining an open-loop (OL) power control parameter according to the UE antenna configuration; determining a path loss parameter according to the UE antenna configuration and the downlink reference signal; and determining uplink transmit power of at least one uplink signal based on at least one of the control information, the OL power control parameter, and the path loss parameter, wherein the communication interfacing unit is further arranged to transmit the at least one uplink signal with the determined uplink transmit power to the base station. - View Dependent Claims (3, 4, 5, 6, 7)
-
Specification