SYSTEM AND METHOD FOR BEAM SWITCHING AND REPORTING

• US 20170346534A1
• Filed: 04/14/2017
• Published: 11/30/2017
• Est. Priority Date: 05/26/2016
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: ISLAM, Muhammad Nazmul, SADIQ, Bilal, LUO, Tao, SUBRAMANIAN, Sundar, LI, Junyi
• Granted Patent: US 10,498,406 B2
• Time in Patent Office: Days
• CPC Class Codes: H01Q 1/245 with means for shaping the antenna pattern, e.g. in order to protect user against rf exposure
• CPC Class Codes: H01Q 1/246 specially adapted for base stations
• CPC Class Codes: H04B 7/0404 the mobile station comprising multiple antennas, e.g. to provide uplink diversity
• CPC Class Codes: H04B 7/0417 Feedback systems
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04B 7/0623 Auxiliary parameters, e.g. power control [PCB] or not acknowledged commands [NACK], used as feedback information
• CPC Class Codes: H04B 7/0695 using beam selection
• CPC Class Codes: H04W 16/28 using beam steering
• CPC Class Codes: H04W 28/0221 power availability or consumption
• CPC Class Codes: H04W 40/08 based on transmission power
• CPC Class Codes: H04W 52/04 TPC
• CPC Class Codes: H04W 88/14 Backbone network devices

Abstract

A UE may receive, from a base station, a message requesting BSI. The UE may determine a number N of BSI reports to send to the base station, and each BSI report may indicate a beam index corresponding to a beam and a received power associated with the beam. The UE may send, to the base station, N BSI reports based on the message requesting BSI. The UE may receive, from the base station, a set of signals through a set of beams, and determine the received power for each signal of the set of signals received through each beam of the set of beams, each received power may be associated with a beam of the set of beams.

Claims

1. A method of wireless communication by a user equipment (UE), the method comprising:

receiving, from a base station, a message requesting beam state information (BSI);

determining a number N of BSI reports to send to the base station, each BSI report indicating a beam index corresponding to a beam and a received power associated with the beam; and

sending, to the base station, N BSI reports based on the message requesting BSI.

2. The method of claim 1, further comprising:

receiving, from the base station, a set of signals through a set of beams; and

determining the received power for each signal of the set of signals received through each beam of the set of beams, each received power associated with a beam of the set of beams.

3. The method of claim 2, wherein the N BSI reports include N received powers corresponding to the highest determined received powers.

4. The method of claim 1, wherein the determination of the number N of BSI reports to send to the base station is based on a type of the message requesting the BSI.

5. The method of claim 4, wherein the type of the message requesting the BSI comprises a downlink control information (DCI) message.

6. The method of claim 5, wherein the number N of BSI reports to send to the base station is determined to be one based on the DCI message.

7. The method of claim 5, wherein the determined number N of BSI reports are sent on a physical uplink control channel (PUCCH).

8. The method of claim 4, wherein the type of message requesting the BSI comprises a random access response (RAR) message.

9. The method of claim 8, wherein the number N of BSI reports is determined to be greater than one based on the RAR message.

10. The method of claim 8, wherein the determined number N of BSI reports are sent on a physical uplink shared channel (PUSCH).

11. An apparatus for wireless communication, the apparatus comprising:

means for receiving, from a base station, a message requesting beam state information (BSI);

means for determining a number N of BSI reports to send to the base station, each BSI report indicating a beam index corresponding to a beam and a received power associated with the beam; and

means for sending, to the base station, N BSI reports based on the message requesting BSI.

12. The apparatus of claim 11, further comprising:

means for receiving, from the base station, a set of signals through a set of beams; and

means for determining the received power for each signal of the set of signals received through each beam of the set of beams, each received power associated with a beam of the set of beams.

13. The apparatus of claim 12, wherein the N BSI reports include N received powers corresponding to the highest determined received powers.

14. The apparatus of claim 11, wherein the determination of the number N of BSI reports to send to the base station is based on a type of the message requesting the BSI.

15. The apparatus of claim 14, wherein the type of the message requesting the BSI comprises a downlink control information (DCI) message.

16. The apparatus of claim 15, wherein the number N of BSI reports to send to the base station is determined to be one based on the DCI message.

17. The apparatus of claim 15, wherein the determined number N of BSI reports are sent on a physical uplink control channel (PUCCH).

18. The apparatus of claim 14, wherein the type of message requesting the BSI comprises a random access response (RAR) message.

19. The apparatus of claim 18, wherein the number N of BSI reports is determined to be greater than one based on the RAR message.

20. The apparatus of claim 18, wherein the determined number N of BSI reports are sent on a physical uplink shared channel (PUSCH).

21. An apparatus for wireless communication, the apparatus comprising:

a memory; and

at least one processor coupled to the memory and configured to;

receive, from a base station, a message requesting beam state information (BSI);

determine a number N of BSI reports to send to the base station, each BSI report indicating a beam index corresponding to a beam and a received power associated with the beam; and

send, to the base station, N BSI reports based on the message requesting BSI.

22. The apparatus of claim 21, wherein the at least one processor is further configured to:

receive, from the base station, a set of signals through a set of beams; and

determine the received power for each signal of the set of signals received through each beam of the set of beams, each received power associated with a beam of the set of beams.

23. The apparatus of claim 22, wherein the N BSI reports include N received powers corresponding to the highest determined received powers.

24. The apparatus of claim 21, wherein the determination of the number N of BSI reports to send to the base station is based on a type of the message requesting the BSI.

25. The apparatus of claim 24, wherein the type of the message requesting the BSI comprises a downlink control information (DCI) message.

26. The apparatus of claim 25, wherein the number N of BSI reports to send to the base station is determined to be one based on the DCI message.

27. The apparatus of claim 25, wherein the determined number N of BSI reports are sent on a physical uplink control channel (PUCCH).

28. The apparatus of claim 24, wherein the type of message requesting the BSI comprises a random access response (RAR) message.

29. The apparatus of claim 28, wherein the number N of BSI reports is determined to be greater than one based on the RAR message.

30. A computer-readable medium storing computer-executable code for wireless communication by a user equipment (UE), comprising code to:

receive, from a base station, a message requesting beam state information (BSI);

determine a number N of BSI reports to send to the base station, each BSI report indicating a beam index corresponding to a beam and a received power associated with the beam; and

send, to the base station, N BSI reports based on the message requesting BSI.