TECHNIQUES FOR POWER CONTROL AND MANAGEMENT

• US 20180103428A1
• Filed: 09/21/2017
• Published: 04/12/2018
• Est. Priority Date: 10/10/2016
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: JIANG, Jing, CHEN, Wanshi, GAAL, Peter, JI, Tingfang
• Granted Patent: US 11,172,444 B2
• Time in Patent Office: Days
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 52/0206 in access points, e.g. base stations access point devices per se H04W88/08
• CPC Class Codes: H04W 52/0225 using monitoring of external events, e.g. the presence of a signal
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/346 distributing total power among users or channels
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 76/27 Transitions between radio resource control [RRC] states
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Aspects of the present disclosure relate to wireless communications and, more particularly, to power control and management for enhanced mobile broadband (eMBB)/ultra-reliable low latency (URLLC) multiplexing. A method for wireless communications that may be performed by a user equipment (UE) is provided. The method generally includes receiving, from a base station (BS), scheduling information scheduling the first UE for communication, with the BS, according to a first communications service type, receiving signaling indicating a second UE is scheduled for communication with the BS according to a second communications service type, and communicating with the BS according to the first communications service type at a reduced transmission power relative to a transmission power used for communicating according to the second communications service type.

Claims

1. A method for wireless communications by a base station (BS), comprising:

scheduling a first user equipment (UE) for communication with the BS according to a first communications service type;

scheduling a second UE for communication with the BS according to a second communications service type; and

communicating with the first UE according to the first communications service type at a reduced transmission power relative to a transmission power used for communicating with the second UE according to the second communications service type.

2. The method of claim 1, further comprising communicating with the second UE according to the second communications service type at a same time as communicating with the first UE according to the first communications service type, wherein communicating with the second UE according to the second communications service type comprises using excess power, resulting from the reduced transmission power for the first communications service type, to communicate with the second UE according to the second communications service type.

3. The method of claim 1, wherein the first communications service type and the second communications service type share a same set of time-frequency resources.

4. The method of claim 1, wherein:

the first communications service type comprises enhanced mobile broadband (eMBB) services; and

the second communications service type comprises ultra-reliable low latency communications (URLLC) services.

5. The method of claim 1, wherein communicating with the first UE according to the first communications service type at the reduced transmission power is based on a power backoff value for the first communications service type, and further comprising:

determining the power backoff value for the first communications service type; and

comprising transmitting signaling to the first UE indicating the power backoff value.

6. The method of claim 5, further comprising receiving data from the first UE at a reduced transmission power according to the signaled power backoff value.

7. The method of claim 5, wherein the signaled power backoff value comprises information for semi-statically configuring the first UE to transmit data according to the first communications service type at a reduced transmission power set according to the power backoff value.

8. The method claim 5, wherein transmitting the signaling to the first UE indicating the power backoff value comprises transmitting the signaling dynamically on a per-second-communications-service-type transmission basis.

9. The method of claim 8, wherein the signaling is transmitted in a unicast message to the first UE or is transmitted in a broadcast message to a plurality of UEs, and wherein, when the signaling is transmitted in a broadcast message to the plurality of UEs, the signaling includes information indicating sub-bands and antenna ports to which the power backoff value applies.

10. The method of claim 8, wherein the signaling further indicates puncturing of certain multiple-input-multiple-output (MIMO) transmission layers.

11. The method of claim 8, further comprising transmitting the signaling indicating the power backoff value to a neighboring base station.

12. The method of claim 8, wherein:

the power backoff value applies to an entire bandwidth used for the first communications service type and the second communications service type;

or

the power backoff value applies to different sub-bands of a larger bandwidth used for the first communications service type and the second communications service type.

13. The method of claim 5, further comprising transmitting signaling to the first UE indicating when the first UE should perform transmissions at a reduced transmission power according to the power backoff value, wherein the signaled power backoff value comprises the signaling indicating when the first UE should perform transmissions at a reduced transmission.

14. The method of claim 5, wherein the power backoff value is signaled on a per-layer or per-codeword basis.

15. The method of claim 5, wherein the transmitting the signaling to the first UE indicating the power backoff value comprises transmitting the signaling in a radio resource control (RRC) message or in downlink control information (DCI).

16. A method for wireless communications by a first user equipment (UE), comprising:

receiving, from a base station (BS), scheduling information scheduling the first UE for communication, with the BS, according to a first communications service type;

receiving signaling indicating a second UE is scheduled for communication with the BS according to a second communications service type; and

communicating with the BS according to the first communications service type at a reduced transmission power relative to a transmission power used for communicating according to the second communications service type.

17. The method of claim 16, further comprising communicating with the BS according to the second communications service type at a same time as communicating with the BS according to the first communications service type, wherein communicating with the BS according to the second communications service type comprises using excess power, resulting from the reduced transmission power for the first communications service type, to communicate with the BS according to the second communications service type.

18. The method of claim 16, wherein the first communications service type and the second communications service type share a same set of time-frequency resources.

19. The method of claim 16, wherein:

the first communications service type comprises enhanced mobile broadband (eMBB) services; and

the second communications service type comprises ultra-reliable low latency communications (URLLC) services.

20. The method of claim 16, wherein communicating with the BS according to the first communications service type at the reduced transmission power is based on a power backoff value for the first communications service type.

21. The method of claim 20, further comprising receiving signaling from the BS indicating the power backoff value, wherein the signaling indicating the power backoff value comprises information for semi-statically configuring the first UE to transmit data according to the first communications service type at a reduced transmission power set according to the power backoff value, and wherein the signaling indicating the power backoff value is received dynamically on a per-second-communications-service-type transmission basis.

22. The method of claim 21, wherein the signaling is received in a unicast message transmitted to the first UE or is received in a broadcast message transmitted to a plurality of UEs, and wherein, when the signaling is received in the broadcast message, the signaling includes information indicating sub-bands and antenna ports to which the power backoff value applies.

23. The method of claim 21, wherein the signaling further indicates puncturing of certain multiple-input-multiple-output (MIMO) transmission layers.

24. The method of claim 21, further comprising receiving the signaling indicating the power backoff value from a neighboring base station.

25. The method of claim 21, wherein:

the power backoff value applies to an entire bandwidth used for the first communications service type and the second communications service type;

or

the power backoff value applies to different sub-bands of a larger bandwidth used for the first communications service type and the second communications service type.

26. The method of claim 21, further comprising receiving signaling indicating when the first UE should perform transmissions at the reduced transmission power according to the power backoff value, wherein the signaled power backoff value comprises the signaling indicating when the first UE should perform transmissions at a reduced transmission.

27. The method of claim 21, wherein the receiving the signaling indicating the power backoff value comprises receiving the signaling in a radio resource control (RRC) message or in downlink control information (DCI).

28. The method of claim 16, further comprising estimating the reduced transmission power blindly.

29. An apparatus for wireless communications by a base station (BS), comprising:

at least one processor configured to;

schedule a first user equipment (UE) for communication with the BS according to a first communications service type;

schedule a second UE for communication with the BS according to a second communications service type; and

communicate with the first UE according to the first communications service type at a reduced transmission power relative to a transmission power used for communicating with the second UE according to the second communications service type; and

a memory coupled with the at least one processor.

30. An apparatus for wireless communications by a first user equipment (UE), comprising:

at least one processor configured to;

receive, from a base station (BS), scheduling information scheduling the first UE for communication, with the BS, according to a first communications service type;

receive signaling indicating a second UE is scheduled for communication with the BS according to a second communications service type; and

communicate with the BS according to the first communications service type at a reduced transmission power relative to a transmission power used for communicating according to the second communications service type; and

a memory coupled with the at least one processor.