METHOD AND DEVICE FOR PHYSICAL UPLINK SHARED CHANNEL TRANSMISSION POWER DETERMINATION IN WIRELESS COMMUNICATIONS
Provided are a method and apparatus for physical uplink shared channel transmission power determination. A user equipment receives downlink control information (DCI) that schedules a physical uplink shared channel (PUSCH) and transmits first and second signals on the PUSCH. The DCI includes first and second sounding reference signal (SRS) resource indicators that are associated with first and second power values, respectively. The antenna ports of the first signal and a first SRS resource are the same, and a linear value of a transmission power of the first signal is based on a product of a linear value of the first power value and a first coefficient. The antenna ports of the second signal and a second SRS resource are the same, and a transmission power linear value of the second signal is based on a product of a linear value of the second power value and a second coefficient.
1 - 28 . (canceled)
29 . A user equipment (UE), comprising:
a receiver configured to receive downlink control information (DCI) that schedules a physical uplink shared channel (PUSCH); and
a transmitter configured to transmit a first signal and a second signal on the PUSCH,
wherein the DCI includes a first sounding reference signal (SRS) resource indicator that indicates a first SRS resource of a first SRS resource set and a second SRS resource indicator that indicates a second SRS resource of a second SRS resource set, and a first power value is associated with the first SRS resource indicator, and a second power value is associated with the second SRS resource indicator, and
wherein:
an antenna port of the first signal is the same as an antenna port of the first SRS resource, and a linear value of a transmission power of the first signal on the PUSCH is based on a product of a linear value of the first power value and a first coefficient, and
an antenna port of the second signal is the same as an antenna port of the second SRS resource, and a linear value of a transmission power of the second signal on the PUSCH is based on a product of a linear value of the second power value and a second coefficient.
30 . The UE according to claim 29 , wherein the DCI has a first field for the first SRS resource indicator and a second field for the second SRS resource indicator.
31 . The UE according to claim 29 , wherein the PUSCH is a codebook-based PUSCH.
32 . The UE according to claim 29 , wherein the first SRS resource indicator is an index of the first SRS resource in the first SRS resource set, and the second SRS resource indicator is an index of the second SRS resource in the second SRS resource set.
33 . The UE according to claim 29 , wherein the first coefficient is a number of non-zero power antenna ports divided by a number of ports of the first SRS resource, and the second coefficient is a number of non-zero power antenna ports divided by a number of ports of the second SRS resource.
34 . The UE according to claim 29 , wherein the DCI indicates a first transmitted precoding matrix indicator (TPMI) and a second TPMI.
35 . The UE according to claim 34 , wherein on a condition that the first TPMI is in a first TPMI set, the first coefficient is one, and on a condition that the first TPMI is not in the first TPMI set, the first coefficient is based on a number of non-zero power antenna port to a number of SRS port ratio.
36 . The UE according to claim 34 , wherein on a condition that the second TPMI is in a second TPMI set, the second coefficient is one, and on a condition that the second TPMI is not in the second TPMI set, the second coefficient is based on a number of non-zero power antenna port to a number of SRS port ratio.
37 . The UE according to claim 29 , wherein the UE is configured to determine a first path loss reference signal resource based on the first SRS resource indicator and a second path loss reference signal resource based on the second SRS resource indicator.
38 . The UE according to claim 29 , wherein the UE is configured to determine a first path loss based on a measurement of a first path loss reference signal, and the first power value and the first path loss are linearly correlated, and a coefficient of a linear correlation between the first power value and the first path loss is a first alpha value, and the UE is configured to determine a second path loss based on a measurement of a second path loss reference signal, and the second power value and the second path loss are linearly correlated, and a coefficient of a linear correlation between the second power value and the second path loss is a second alpha value.
39 . The UE according to claim 29 , wherein:
the DCI indicates a first time-frequency resource set,
on a condition that a sum of the first power value and the second power value is greater than a first power threshold value, the second signal is not transmitted in the first time-frequency resource set, and
on a condition that the sum of the first power value and the second power value is less than or equal to the first power threshold value, the second signal is transmitted in the first time-frequency resource set.
40 . The UE according to claim 29 , wherein:
the first SRS resource indicator schedules a first transport block and the second SRS resource indicator schedules a second transport block, the first transport block is mapped to a first codeword, and the second transport block is mapped to a second codeword.
41 . A method, comprising:
receiving, by a user equipment (UE), downlink control information (DCI) that schedules a physical uplink shared channel (PUSCH); and
transmitting a first signal and a second signal on the PUSCH,
wherein the DCI includes a first sounding reference signal (SRS) resource indicator that indicates a first SRS resource of a first SRS resource set and a second SRS resource indicator that indicates a second SRS resource of a second SRS resource set, and a first power value is associated with the first SRS resource indicator, and a second power value is associated with the second SRS resource indicator, and
wherein:
an antenna port of the first signal is the same as an antenna port of the first SRS resource, and a linear value of a transmission power of the first signal on the PUSCH is based on a product of a linear value of the first power value and a first coefficient, and
an antenna port of the second signal is the same as an antenna port of the second SRS resource, and a linear value of a transmission power of the second signal on the PUSCH is based on a product of a linear value of the second power value and a second coefficient.
42 . The method according to claim 41 , wherein the DCI has a first field for the first SRS resource indicator and a second field for the second SRS resource indicator.
43 . The method according to claim 41 , wherein the PUSCH is a codebook-based PUSCH.
44 . The method according to claim 41 , wherein the first SRS resource indicator is an index of the first SRS resource in the first SRS resource set, and the second SRS resource indicator is an index of the second SRS resource in the second SRS resource set.
45 . The method according to claim 41 , wherein the first coefficient is a number of non-zero power antenna ports divided by a number of ports of the first SRS resource, and the second coefficient is a number of non-zero power antenna ports divided by a number of ports of the second SRS resource.
46 . The method according to claim 41 , wherein the DCI indicates a first transmitted precoding matrix indicator (TPMI) and a second TPMI.
47 . The method according to claim 46 , wherein on a condition that the first TPMI is in a first TPMI set, the first coefficient is one, and on a condition that the first TPMI is not in the first TPMI set, the first coefficient is based on a number of non-zero power antenna port to a number of SRS port ratio.
48 . The method according to claim 46 , wherein on a condition that the second TPMI is in a second TPMI set, the second coefficient is one, and on a condition that the second TPMI is not in the second TPMI set, the second coefficient is based on a number of non-zero power antenna port to a number of SRS port ratio.
49 . The method according to claim 41 , comprising:
determining a first path loss reference signal resource based on the first SRS resource indicator and a second path loss reference signal resource based on the second SRS resource indicator.
50 . The method according to claim 41 , comprising:
determining a first path loss based on a measurement of a first path loss reference signal, and the first power value and the first path loss are linearly correlated, and a coefficient of a linear correlation between the first power value and the first path loss is a first alpha value; and
determining a second path loss based on a measurement of a second path loss reference signal, and the second power value and the second path loss are linearly correlated, and a coefficient of a linear correlation between the second power value and the second path loss is a second alpha value.
51 . The method according to claim 41 , wherein:
the DCI indicates a first time-frequency resource set,
on a condition that a sum of the first power value and the second power value is greater than a first power threshold value, the second signal is not transmitted in the first time-frequency resource set, and
on a condition that the sum of the first power value and the second power value is less than or equal to the first power threshold value, the second signal is transmitted in the first time-frequency resource set.
52 . The method according to claim 41 , wherein the first SRS resource indicator schedules a first transport block and the second SRS resource indicator schedules a second transport block, the first transport block is mapped to a first codeword, and the second transport block is mapped to a second codeword.