Uplink power control

Abstract

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.

What is claimed: 
     
         1 . A wireless transmit/receive unit (WTRU) that comprises:
 a processor, configured to:   determine that the WTRU is to performed a first transmission using a first transmission beam and a second transmission using a second transmission beam;   determine an uplink transmission power for one or more of the first or second transmissions, wherein:
 on a condition that an angular separation of the first and second transmission beams is greater than a first separation threshold, determine the uplink transmission power based on the first transmission associated with the first transmission beam having a first maximum power level parameter and the second transmission associated with the second transmission beam having a second maximum power level parameter, and 
 on a condition that an angular separation of the first and second transmission beams is less than a second separation threshold, determine the uplink transmission power based on the first transmission associated with the first transmission beam and the second transmission associated with the second transmission beam having a shared maximum power level parameter; and 
   transmit the first transmission using the first transmission beam and the second transmission using the second transmission beam.   
     
     
         2 . The WTRU of  claim 1 , wherein the processor is further configured to determine the angular separation of the first and second transmission beams based on one or more of an angular distance, directional correlation, or spatial separation of the first and second transmission beams. 
     
     
         3 . The WTRU of  claim 1 , wherein one or more of the first maximum power level parameter, the second maximum power level parameter, or the shared maximum power level parameter comprises a configured maximum transmitted power (Pcmax), wherein the Pcmax is based on one or more of a maximum gain or a maximum effective isotropic radiated power (EIRP). 
     
     
         4 . The WTRU of  claim 1 , wherein on a condition that the determined uplink transmission power for one or more of the first or second transmissions exceed a maximum allowed power, perform power scaling of one or more of the first or second transmission beams based on a priority order. 
     
     
         5 . The WTRU of  claim 4 , wherein the priority order for performing the power scaling of one or more of the first or second transmission beams is based on one or more of a numerology parameter, or property of the first or second transmission beam that comprises one or more of a duration, waveform used, or type of transmission. 
     
     
         6 . The WTRU of  claim 1 , wherein the shared uplink transmission power level parameter comprises an EIRP level parameter, the processor is further configured to:
 determine available power associated with the first transmission beam; and   on a condition that a EIRP threshold value is exceeded when the second transmission beam is transmitted with the first transmission beam, perform power allocation on one or more of the first or second transmission beams.   
     
     
         7 . The WTRU of  claim 6 , wherein performing the power allocation, the processor is configured to scale one or more of the first or second transmission beams to satisfy the EIRP threshold value associated with the uplink transmission power. 
     
     
         8 . The WTRU of  claim 7 , wherein scaling one or more of the first or second transmission beams are based on one or more of the Pcmax, a total power of on-going transmission of the second transmission, or a guaranteed power of the second transmission. 
     
     
         9 . The WTRU of  claim 6 , wherein performing the power allocation, the processor is further configured to:
 determine a required transmission power of the first and second transmission beams;   calculate a normalized required transmission power associated with the required transmission power of the first and second transmission beams; and   perform the power allocation of the first and second transmission beams based on the calculated normalized required transmission power.   
     
     
         10 . The WTRU of  claim 1 , wherein the first separation threshold and the second separation threshold have a same value. 
     
     
         11 . A method comprising:
 a processor, configured to:   determining that a wireless transmit/receive unit (WTRU) is to performed a first transmission using a first transmission beam, a second transmission using a second transmission beam, a third transmission using a third transmission beam, or a fourth transmission using a fourth transmission beam;   determining an uplink transmission power for one or more of the first, second, third, or fourth transmissions, wherein:   on a condition that an angular separation of the first and second transmission beams is greater than a first separation threshold, determining the uplink transmission power based on the first transmission associated with the first transmission beam having a first maximum power level parameter and the second transmission associated with the second transmission beam having a second maximum power level parameter, and   on a condition that an angular separation of the third and fourth transmission beams is less than a second separation threshold, determining the uplink transmission power based on the third transmission associated with the third transmission beam and the fourth transmission associated with the fourth transmission beam having a shared maximum power level parameter; and   transmitting one or more of the first transmission using the first transmission beam, the second transmission using the second transmission beam, the third transmission using the third transmission beam, or the fourth transmission using the fourth transmission beam.   
     
     
         12 . The method  claim 11 , wherein determining the angular separation of the first and second transmission beams or the third and fourth transmission beams is based on one or more of an angular distance, directional correlation, or spatial separation between the first and second transmission beams or the third and fourth transmission beams. 
     
     
         13 . The method  claim 11 , wherein one or more of the first maximum power level parameter, the second maximum power level parameter, or the shared maximum power level parameter comprises a configured maximum transmitted power (Pcmax), wherein the Pcmax is based on one or more of a maximum gain or a maximum effective isotropic radiated power (EIRP). 
     
     
         14 . The method  claim 11 , wherein on a condition that the determined uplink transmission power for one or more of the first, second, third, or fourth transmissions exceeds a maximum allowed power, performing power scaling of one or more of the first, second, third, or fourth transmission beams based on a priority order. 
     
     
         15 . The method  claim 14 , wherein the priority order for performing the power scaling of one or more of the first, second, third, or fourth transmission beams is based on one or more of a numerology parameter, or property of the first, second, third, or fourth transmission beams that comprises one or more of a duration, waveform used, or type of transmission. 
     
     
         16 . The method  claim 11 , wherein the shared uplink transmission power level parameter comprises an EIRP level parameter, the method further comprising:
 determining available power associated with the first or third transmission beam; and   on a condition that a EIRP threshold value is exceeded when the second or fourth transmission beam is transmitted with the first or third transmission beam respectively, performing power allocation on one or more of the first, second, third, or fourth transmission beams.   
     
     
         17 . The method  claim 16 , wherein performing the power allocation comprising:
 configuring to scale one or more of the first, second, third, or fourth transmission beams to satisfy the EIRP threshold value associated with the uplink transmission power.   
     
     
         18 . The method  claim 17 , wherein scaling one or more of the first, second, third, or fourth transmission beams are based on one or more of the Pcmax, a total power of on-going transmission of the second or fourth transmission, or a guaranteed power of the second or fourth transmission. 
     
     
         19 . The method of  claim 16 , wherein performing the power allocation, the method further comprising:
 determining a required transmission power of one or more of the first, second, third, and fourth transmission beams;   calculating a normalized required transmission power associated with the required transmission power of one or more of the first, second, third, and fourth transmission beams; and   performing the power allocation of one or more of the first, second, third, and fourth transmission beams based on the calculated normalized required transmission power.   
     
     
         20 . The method of  claim 11 , wherein the first separation threshold and the second separation threshold have a same value.