Method and apparatus for estimating pathloss of PUSCH in a wireless communication system
Methods and apparatuses estimating pathloss of PUSCH in a wireless communication system are disclosed herein. In one method, the UE receives a first configuration of a first serving cell and a second serving cell, wherein the second serving cell is a pathloss reference for the first serving cell. The UE receives a second configuration of multiple downlink bandwidth parts of the second serving cell, wherein a downlink bandwidth part among the multiple downlink bandwidth parts is an active downlink bandwidth part. The UE estimates (or derives) a pathloss for an uplink transmission in an uplink bandwidth part of the first serving cell based on a reference signal in the downlink bandwidth part.
1. A method of a User Equipment (UE), the method comprising:
receiving a first configuration of a first serving cell and a second serving cell, wherein the first serving cell is configured with pathlossReferenceLinking parameter;
receiving a second configuration of multiple downlink bandwidth parts of the second serving cell, wherein a downlink bandwidth part among the multiple downlink bandwidth parts is an active downlink bandwidth part that is activated by a downlink control information (DCI) indicating a bandwidth part switch; and
estimating or deriving a pathloss for an uplink transmission in an uplink bandwidth part of the first serving cell based solely on a reference signal in the active downlink bandwidth part only, wherein the active downlink bandwidth part is not linked with the uplink bandwidth part.
2. The method of claim 1 , wherein the active downlink bandwidth part and the uplink bandwidth part have different bandwidth part indices.
3. The method of claim 1 , wherein the bandwidth part indices are identifiers for the bandwidth parts provided by configurations of bwp-Id.
4. The method of claim 1 , wherein the active downlink bandwidth part and the uplink bandwidth part have different center frequencies.
5. The method of claim 1 , wherein a number of the uplink bandwidth parts configured on the first serving cell is different from a number of the multiple downlink bandwidth parts of the second serving cell.
6. The method of claim 1 , wherein the UE uses the reference signal in the active downlink bandwidth part to derive a decibel value using reference signal index q d .
7. The method of claim 1 , wherein the second serving cell is a pathloss reference for the first serving cell.
8. A method of a User Equipment (UE), the method comprising:
operating in a paired spectrum in a serving cell, wherein a multiple downlink bandwidth parts of the serving cell is configured and a downlink bandwidth part among the multiple downlink bandwidth parts is an active downlink bandwidth part that is activated by a downlink control information (DCI) indicating a bandwidth part switch; and
estimating or deriving a pathloss for an uplink transmission in an uplink bandwidth part of the serving cell based solely on a reference signal in the active downlink bandwidth part only, wherein the active downlink bandwidth part does not correspond to the uplink bandwidth part.
9. The method of claim 8 , wherein the active downlink bandwidth part and the uplink bandwidth part have different bandwidth part indices.
10. The method of claim 8 , wherein the bandwidth part indices are identifiers for the bandwidth parts provided by configurations of bwp-Id.
11. The method of claim 8 , wherein the active downlink bandwidth part and the uplink bandwidth part have different center frequencies.
12. The method of claim 8 , wherein a number of the uplink bandwidth part configured on the serving cell is different from a number of the downlink bandwidth parts of the serving cell.
13. The method of claim 8 , wherein the UE uses the reference signal in the active downlink bandwidth part to derive a decibel value using reference signal index q d .
14. A User Equipment (UE), comprising:
a processor; and
a memory operatively coupled to the processor, wherein the processor is configured to execute a program code to:
receive a first configuration of a first serving cell and a second serving cell, wherein the first serving cell is configured with a pathlossReferenceLinking parameter;
receive a second configuration of multiple downlink bandwidth parts of the second serving cell, wherein a downlink bandwidth part among the multiple downlink bandwidth parts is an active downlink bandwidth part that is activated by a downlink control information (DCI) indicating a bandwidth part switch; and
estimate or derive a pathloss for an uplink transmission in an uplink bandwidth part of the first serving cell based solely on a reference signal in the active downlink bandwidth part only, wherein the active downlink bandwidth part is not linked with the uplink bandwidth part.
15. The UE of claim 14 , wherein the active downlink bandwidth part and the uplink bandwidth part have different bandwidth part indices.
16. The UE of claim 14 , wherein the bandwidth part indices are identifiers for the bandwidth parts provided by configurations of bwp-Id.
17. The UE of claim 14 , wherein the active downlink bandwidth part and the uplink bandwidth part have different center frequencies.
18. The UE of claim 14 , wherein a number of the uplink bandwidth parts configured on the first serving cell is different from a number of the multiple downlink bandwidth parts of the second serving cell.
19. The UE of claim 14 , wherein the processor is further configured to execute the program code to:
use the reference signal in the active downlink bandwidth part to derive a decibel value using reference signal index q d .
20. The method of claim 14 , wherein the second serving cell is a pathloss reference for the first serving cell.