Granted Patent B2

US 12,262,329 · App. 17/759,005 · Granted Mar 25, 2025

Inventor: Wei Hong (Beijing, CN)

Assignee: Beijing Xiaomi Mobile Software Co., Ltd.

H04W52/146H04W52/365H04W72/1268H04W72/23

Abstract

Claims (78)

1. A method for uplink data transmission, performed by a user equipment (UE), comprising:

reporting maximum power reduction (P-MPR) information to a base station, wherein the P-MPR information is configured to indicate a maximum power backoff supported by the UE in a current communication frequency band;

wherein the P-MPR information comprises:

a P-MPR value, or

a difference between the P-MPR value and a reference power reduction value;

wherein reporting the P-MPR information to the base station comprises:

reporting the P-MPR information to the base station with a power headroom reporting (PHR) message which carries the P-MPR information;

wherein reporting the P-MPR information to the base station with the PHR message comprises:

adding a preset information field carrying the P-MPR information in the PHR message,

wherein the preset information field comprises at least one of:

an information bit for indicating a P-MPR value or a difference between a P-MPR value and a reference power reduction value; or

a reserved bit.

2. The method according to claim 1 , wherein the method further comprises:

receiving scheduling information sent by the base station based on the P-MPR information; and

transmitting uplink data according to the scheduling information.

3. The method according to claim 1 , wherein reporting the P-MPR information to the base station further comprises:

periodically reporting the P-MPR information to the base station.

4. The method according to claim 1 , wherein reporting the P-MPR information to the base station further comprises:

reporting the P-MPR information to the base station in a case where a preset trigger event is satisfied.

5. The method according to claim 4 , wherein the preset trigger event comprises:

P-MPR value is larger than or equal to a first preset threshold; or

a difference between the P-MPR value and a reference power reduction value is larger than or equal to a second preset threshold.

6. The method according to claim 5 , wherein the reference power reduction value is determined according to a maximum power reduction value satisfying a first transmission requirement of a current carrier and a cell, a maximum power reduction value satisfying a second transmission requirement of the current carrier and the cell, and a power reduction value scaling factor for the current communication frequency band in a plurality of supported frequency bands.

7. A method for uplink data transmission, performed by a base station, comprising:

receiving maximum power reduction (P-MPR) information reported by a user equipment (UE), wherein the P-MPR information is configured to indicate a maximum power backoff supported by the UE in a current communication frequency band;

wherein the P-MPR information comprises:

a P-MPR value, or

a difference between the P-MPR value and a reference power reduction value;

wherein receiving the P-MPR information reported by the UE comprises:

receiving a power headroom reporting (PHR) message reported by the UE which carries the P-MPR information; and

determining the P-MPR information from a preset information field in the PHR message,

wherein the preset information field comprises at least one of:

an information bit for indicating a P-MPR value or a difference between a P-MPR value and a reference power reduction value; or

a reserved bit.

8. The method according to claim 7 , wherein the method further comprises:

determining an uplink duty cycle according to the P-MPR information;

transmitting scheduling information to the UE according to the uplink duty cycle; and

receiving uplink data transmitted by the UE according to the scheduling information.

9. The method according to claim 7 , wherein receiving the P-MPR information reported by the UE further comprises:

receiving the P-MPR information periodically reported by the UE.

10. The method according to claim 7 , wherein receiving the P-MPR information reported by the UE further comprises:

receiving the P-MPR information reported by the UE to the base station in a case where a preset trigger event is satisfied.

11. The method according to claim 10 , wherein the preset trigger event comprises:

a P-MPR value is larger than or equal to a first preset threshold; or

a difference between the P-MPR value and a reference power reduction value is larger than or equal to a second preset threshold.

12. The method according to claim 11 , wherein the reference power reduction value is determined according to a maximum power reduction value satisfying a first transmission requirement of a current carrier and a cell, a maximum power reduction value satisfying a second transmission requirement of the current carrier and the cell, and a power reduction value scaling factor for the current communication frequency band in a plurality of supported frequency bands.

13. The method according to claim 8 , wherein determining the uplink duty cycle according to the P-MPR information comprises:

obtaining a preset corresponding relationship between the P-MPR value and uplink duty cycle when a PHR value is 0 and the P-MPR information comprises the P-MPR value; and

determining the uplink duty cycle corresponding to the P-MPR value based on the corresponding relationship.

14. The method according to claim 8 , wherein determining the uplink duty cycle according to the P-MPR information comprises:

determining a maximum value of 100% and a reference uplink duty cycle as the uplink duty cycle when a PHR value is not 0 and the P-MPR information comprises the P-MPR value.

15. The method according to claim 14 , wherein the reference uplink duty cycle is determined according to an uplink duty cycle level value and the PHR value.

16. An apparatus for uplink data transmission, comprising:

a processor; and

a memory for storing executable instructions,

wherein the processor is configured to execute the executable instructions to:

report maximum power reduction (P-MPR) information to a base station, wherein the P-MPR information is configured to indicate a maximum power backoff supported by the UE in a current communication frequency band;

wherein the P-MPR information comprises:

a P-MPR value, or

a difference between the P-MPR value and a reference power reduction value;

wherein reporting the P-MPR information to the base station comprises:

reporting the P-MPR information to the base station with a power headroom reporting (PHR) message which carries the P-MPR information;

wherein reporting the P-MPR information to the base station with the PHR message comprises:

adding a preset information field carrying the P-MPR information in the PHR message,

wherein the preset information field comprises at least one of:

an information bit for indicating a P-MPR value or a difference between a P-MPR value and a reference power reduction value; or

a reserved bit.

17. An apparatus for uplink data transmission, comprising:

a processor; and

a memory for storing executable instructions,

wherein the processor is configured to execute the executable instructions to implement the method for uplink data transmission according to claim 7 .

18. The apparatus according to claim 17 , wherein the processor is further configured to:

periodically report the P-MPR information to the base station.

19. The apparatus according to claim 17 , wherein the processor is further configured to:

report the P-MPR information to the base station in a case where a preset trigger event is satisfied.

20. The apparatus according to claim 19 , wherein the preset trigger event comprises:

a P-MPR value is larger than or equal to a first preset threshold; or

a difference between the P-MPR value and a reference power reduction value is larger than or equal to a second preset threshold.

Assignments (1)

Continuity (1)

References Cited (27)