Hybrid PDSCH for out-of-band earth station interference cancelation
Methods and apparatuses in a wireless communication system. A base station (BS) includes a transceiver and a processor. The processor is configured to receive, via the transceiver, a channel state information (CSI) report from at least one user equipment (UE). The processor is also configured to configure CSI-reference signal (RS) resources for the at least one UE. The processor is further configured to, based on the CSI report from the at least one UE, perform one of: set a transmission power to full power for transmission in a physical downlink shared channel (PDSCH); or apply a back-off percentage to the transmission power in the PDSCH.
1. A base station (BS) in a wireless communication system, the BS comprising:
a transceiver; and
a processor configured to:
receive, via the transceiver, a channel state information (CSI) report from at least one user equipment (UE);
configure CSI—reference signal (RS) resources for at least one user equipment (UE); and
based on the CSI report from the at least one UE and a classification including a layer of the at least one UE to receive multiple beams, perform one of operations to:
set a transmission power to full power for a physical downlink shared channel (PDSCH) transmission; or
apply a back-off percentage to the transmission power in the PDSCH transmission, wherein the classification is determined based on an achievable rate comprising a first achievable rate associated with a first CSI-RS report and a second achievable rate associated with a second CSI-RS report that are compared to identify a level of power in the PDSCH transmission.
2. The BS of claim 1 , wherein the CSI report from the at least one UE comprises one or more of:
a precoding matrix indicator (PMI),
a rank indicator (RI), and
a channel quality indicator (CQI).
3. The BS of claim 2 , wherein, to perform setting the full power or applying the back-off percentage, the processor is further configured to:
determine the layer of the at least one UE included in the classification of the at least one UE, the layer being identified based on a number of beams that the at least one UE receives from the BS.
4. The BS of claim 3 , wherein the classification of the at least one UE comprises one of:
the at least one UE performing with a rank-1; or
the at least one UE performing with a rank-2 or greater.
5. The BS of claim 4 , wherein:
the at least one UE performing with the rank-1 further comprises a transmission at the full power; and
the at least one UE performing with the rank-2 or greater further comprises a transmission at power less than the full power.
6. The BS of claim 3 , wherein, when the at least one UE performs with a rank-1, the processor is further configured to:
set the transmission power to the full power and boost a channel quality indicator (CQI).
7. The BS of claim 3 , wherein, when the at least one UE performs with a rank-2 or greater, the processor is further configured to:
follow the CSI report and apply the back-off percentage to the transmission power.
8. The BS of claim 3 , wherein the achievable rate is calculated according to:
Rate= RI *log 2 (1+α*SINR)
where the α is an outer loop control parameter and the SINR is a signal to interference plus noise ratio that is converted from the CQI, and
wherein:
when the first achievable rate is higher than the second achievable rate, then the first CSI-RS report is used with the full power in the PDSCH transmission and a CQI boosting, and
when the second achievable rate following the second CSI-RS report is higher than the first achievable rate, then the second CSI-RS report is used with back-off power in the PDSCH transmission.
9. The BS of claim 3 , wherein the achievable rate is calculated according to:
when a reference signal received power (RSRP) is lower than a threshold, the CSI report is configured to be rank-1 restricted and rank-1 PMI-restriction is applied; and
when the RSRP is greater than a threshold, the CSI report is configured to allow up to rank-4 reporting and no PMI-restriction is applied.
10. A method of a base station (BS), the method comprising:
receiving, via a transceiver, a channel state information (CSI) report from at least one user equipment (UE);
configuring CSI—reference signal (RS) resources for the at least one UE; and
based on the CSI report from the at least one UE and a classification including a layer of the at least one UE to receive multiple beams, performing one of:
setting a transmission power to full power for a physical downlink shared channel (PDSCH) transmission; or
applying a back-off percentage to the transmission power in the PDSCH transmission, wherein the classification is determined based on an achievable rate comprising a first achievable rate associated with a first CSI-RS report and a second achievable rate associated with a second CSI-RS report that are compared to identify a level of power in the PDSCH transmission.
11. The method of claim 10 , wherein the CSI report from the at least one UE comprises one or more of:
a precoding matrix indicator (PMI),
a rank indicator (RI), and
a channel quality indicator (CQI).
12. The method of claim 11 , wherein performing setting the full power or applying the back-off percentage comprises:
determining the layer of the at least one UE included in the classification of the at least one UE, the layer being identified based on a number of beams that the at least one UE receives from the BS.
13. The method of claim 12 , wherein the classification of the at least one UE comprises one of:
the at least one UE performing with a rank-1; or
the at least one UE performing with a rank-2 or greater.
14. The method of claim 13 , wherein:
the at least one UE performing with the rank-1 further comprises a transmission at the full power; and
the at least one UE performing with the rank-2 or greater further comprises a transmission at power less than the full power.
15. The method of claim 12 , wherein, when the at least one UE performs with a rank-1, further comprising:
setting the transmission power to the full power and boost a channel quality indicator (CQI).
16. The method of claim 12 , wherein, when the at least one UE performs with a rank-2 or greater, further comprising:
following the CSI report and applying the back-off percentage to the transmission power.
17. The method of claim 12 , wherein the achievable rate is calculated according to:
Rate= RI *log 2 (1+α*SINR)
where the α is an outer loop control parameter and the SINR is a signal to interference plus noise ratio that is converted from the CQI, and
wherein:
when the first achievable rate is higher than the second achievable rate, then the first CSI-RS report is used with the full power in the PDSCH transmission and a CQI boosting, and
when the second achievable rate following the second CSI-RS report is higher than the first achievable rate, then the second CSI-RS report is used with back-off power in the PDSCH transmission.
18. The method of claim 12 , wherein the classification of the at least one UE is determined based on an achievable rate calculated according to:
when a reference signal received power (RSRP) is lower than a threshold, the CSI report is configured to be rank-1 restricted and rank-1 PMI-restriction is applied; and
when the RSRP is greater than a threshold, the CSI report is configured to allow up to rank-4 reporting and no PMI-restriction is applied.
19. A non-transitory computer readable medium comprising instructions that, when executed by at least one processor, cause the at least one processor to:
receive a channel state information (CSI) report from at least one user equipment (UE);
configure CSI—reference signal (RS) resources for the at least one UE; and
based on the CSI report from the at least one UE and a classification including a layer of the at least one UE to receive multiple beams, perform one of operations to:
set a transmission power to full power for a physical downlink shared channel (PDSCH) transmission; or
apply a back-off percentage to the transmission power in the PDSCH transmission, wherein the classification is determined based on an achievable rate comprising a first achievable rate associated with a first CSI-RS report and a second achievable rate associated with a second CSI-RS report that are compared to obtain to identify a level of power in the PDSCH transmission.
20. The non-transitory computer readable medium of claim 19 , wherein the CSI report from the at least one UE comprises one or more of:
a precoding matrix indicator (PMI),
a rank indicator (RI), and
a channel quality indicator (CQI).
21. The non-transitory computer readable medium of claim 20 , wherein to set the full power or apply the back-off percentage, the instructions are further configured to cause the at least one processor to:
determine the layer of the at least one UE included in the classification of the at least one UE, the layer being identified based on a number of beams that the at least one UE receives from a base station.
22. The non-transitory computer readable medium of claim 21 , wherein the classification of the at least one UE comprises one of:
the at least one UE performing with a rank-1; or
the at least one UE performing with a rank-2 or greater.
23. The non-transitory computer readable medium of claim 22 , wherein:
the at least one UE performing with the rank-1 further comprises a transmission at the full power; and
the at least one UE performing with the rank-2 or greater further comprises a transmission at power less than the full power.
24. The non-transitory computer readable medium of claim 21 , wherein, when the at least one UE performs with a rank-1, the instructions are further configured to cause the at least one processor to:
set the transmission power to the full power and boost a channel quality indicator (CQI).
25. The non-transitory computer readable medium of claim 21 , wherein, when the at least one UE performs with a rank-2 or greater, the instructions are further configured to cause the at least one processor to:
follow the CSI report and apply the back-off percentage to the transmission power.
26. The non-transitory computer readable medium of claim 21 , wherein the achievable rate is calculated according to:
Rate= RI *log 2 (1+α*SINR)
where the α is an outer loop control parameter and the SINR is a signal to interference plus noise ratio that is converted from the CQI, and
wherein:
when the first achievable rate is higher than the second achievable rate, then the first CSI-RS report is used with the full power in the PDSCH transmission and a CQI boosting, and
when the second achievable rate following the second CSI-RS report is higher than the first achievable rate, then the second CSI-RS report is used with back-off power in the PDSCH transmission.
27. The non-transitory computer readable medium of claim 21 , wherein the achievable rate is calculated according to:
when a reference signal received power (RSRP) is lower than a threshold, the CSI report is configured to be rank-1 restricted and rank-1 PMI-restriction is applied; and
when the RSRP is greater than a threshold, the CSI report is configured to allow up to rank-4 reporting and no PMI-restriction is applied.