Uplink power control
Techniques for uplink power control (e.g., for New Radio (NR)) are disclosed. A wireless transmit/receive unit (WTRU) may determine that the WTRU is to perform a first and a second transmissions using a first and a second transmission beams. The WTRU may determine an uplink transmission power for one or more of the first or second transmissions. For example, if the angular separation of the first and the second transmission beams is greater than a first separation threshold, the WTRU may determine the uplink transmission power having a first maximum power level parameter and a second maximum power level parameter. If the angular separation of the first and the second transmission beams is less than a second separation threshold, the WTRU determine the uplink transmission power having a shared maximum power level parameter. The WTRU may transmit the first and second transmissions using the first and second transmission beams, respectively.
1. A method implemented in a wireless transmit/receive unit (WTRU), the method comprising:
receiving configuration information related to a set of physical resource blocks, wherein each physical resource block of the set of physical resource blocks is associated with a same numerology;
determining, based on the configuration information, a set of power control parameters and a respective subcarrier spacing associated with the set of physical resource blocks;
determining a transmission power for the set of physical resource blocks using the set of power control parameters and a determined power allocation value, wherein the determined power allocation value corresponds to a ratio between a first value of the respective subcarrier spacing and a second value of a reference subcarrier spacing, and wherein the transmission power for the set of physical resource blocks is determined based on a logarithm of a value, the value being determined based on at least the determined power allocation value; and
transmitting the set of physical resource blocks using the determined transmission power.
2. The method of claim 1 , wherein the transmission power for the set of physical resource blocks is adjusted using a scaling factor in the determined power allocation value.
3. The method of claim 1 , further comprising determining a scaling factor in the determined power allocation value, wherein the scaling factor is a multiplicative factor, an offset value, or the ratio between the first value of the respective subcarrier spacing associated with the set of physical resource blocks and the second value of the reference subcarrier spacing.
4. The method of claim 3 , wherein the first value of the reference subcarrier spacing is 15 kHz, and the first value of the respective subcarrier spacing is a multiplication of the second value of the reference subcarrier spacing.
5. A wireless transmit/receive unit (WTRU) for wireless communications, the WTRU comprising:
a receiver configured to receive configuration information related to a set of physical resource blocks, wherein each physical resource block of the set of physical resource blocks is associated with a same numerology;
a processor configured to:
determine, based on the configuration information, a set of power control parameters and a respective subcarrier spacing associated with the set of physical resource blocks;
determine a transmission power for the set of physical resource blocks using the set of power control parameters and a determined power allocation value, wherein the determined power allocation value corresponds to a ratio between a first value of the respective subcarrier spacing, and a second value of a reference subcarrier spacing, and wherein the transmission power for the set of physical resource blocks is determined based on a logarithm of a value, the value being determined based on at least the determined power allocation value; and
a transmitter configured to transmit the set of physical resource blocks using the determined transmission power.
6. The WTRU of claim 5 , wherein the processor is further configured to adjust the transmission power for the set of physical resource blocks using a scaling factor in the determined power allocation value.
7. The WTRU of claim 5 , wherein the processor is further configured to determine a scaling factor in the determined power allocation value, wherein the scaling factor is a multiplicative factor, an offset value, or the ratio between the first value of the respective subcarrier spacing associated with the set of physical resource blocks and the second value of the reference subcarrier spacing.
8. The WTRU of claim 7 , wherein the first value of the reference subcarrier spacing is 15 kHz, and the first value of the respective subcarrier spacing is a multiplication of the second value of the reference subcarrier spacing.
9. The WTRU of claim 5 , wherein the second value of the reference subcarrier spacing is 15 kHz.
10. The WTRU of claim 9 , wherein the first value of the respective subcarrier spacing is 30 kHz, and the determined power allocation value is two.
11. The WTRU of claim 9 , wherein the first value of the respective subcarrier spacing is 60 kHz, and the determined power allocation value is four.
12. The method of claim 1 , wherein the second value of the reference subcarrier spacing is 15 kHz.
13. The method of claim 12 , wherein the first value of the respective subcarrier spacing is 30 kHz, and the determined power allocation value is two.
14. The method of claim 12 , wherein the first value of the respective subcarrier spacing is 60 kHz, and the determined power allocation value is four.