METHOD AND APPARATUS FOR BEAM MANAGEMENT IN A WIRELESS COMMUNICATION SYSTEM

• US 20180167883A1
• Filed: 11/24/2017
• Published: 06/14/2018
• Est. Priority Date: 12/13/2016
• Status: Active Grant

• Current Assignee: ASUSTek Computer, Inc.
• Original Assignee: ASUSTek Computer, Inc.
• Inventors: Guo, Yu-Hsuan, Tsai, Hsin-Hsi, Kuo, Richard Lee-Chee, Ou, Meng-Hui
• Granted Patent: US 11,240,753 B2
• Time in Patent Office: Days
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04B 7/0695 using beam selection
• CPC Class Codes: H04B 7/088 using beam selection
• CPC Class Codes: H04W 16/28 using beam steering
• CPC Class Codes: H04W 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/046 the resource being in the space domain, e.g. beams
• CPC Class Codes: H04W 74/004 in the uplink, i.e. towards network
• CPC Class Codes: H04W 76/27 Transitions between radio resource control [RRC] states
• CPC Class Codes: H04W 76/28 Discontinuous transmission [DTX]; Discontinuous reception [DRX]
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A method and apparatus are disclosed from the perspective of a UE. In one embodiment, the method includes receiving a configuration, wherein the configuration indicates whether the UE performs a beam management during a specific period of time. The method also includes determining whether to perform the beam management during the specific period of time based on at least the configuration.

Claims

1. A method of a UE (User Equipment), comprising:

receiving a configuration, wherein the configuration indicates whether the UE performs a beam management during a specific period of time; and

determining whether to perform the beam management during the specific period of time based on at least the configuration.

2. The method of claim 1, wherein the specific period of time is DRX (Discontinuous Reception) inactive time.

3. The method of claim 1, wherein the beam management includes a beam feedback procedure.

4. A method of a UE (User Equipment), comprising:

maintaining at least one serving beam in a serving cell;

determining whether the at least one serving beam is valid when uplink data is available for transmission; and

selecting a specific beam of the serving cell and transmitting a request for uplink resource via the specific beam if the at least one serving beam is not valid.

5. The method of claim 4, wherein the UE selects the specific beam based on beam reference signal measurement.

6. The method of claim 4, wherein the specific beam is a best beam measured by the UE.

7. The method of claim 4, wherein the request is a scheduling request.

8. The method of claim 4, wherein the request is a random access preamble.

9. The method of claim 4, wherein the UE performs measurement on the least one serving beam to determine whether the at least one serving beam is valid or not.

10. The method of claim 4, wherein the at least one serving beam is not valid during DRX (Discontinuous Reception) inactive time if a beam feedback procedure is not continued during the DRX inactive time.

11. The method of claim 4, wherein a timer is used to determine whether the at least one serving beam is valid or not.

12. The method of claim 4, wherein the UE transmits the request via the at least one serving beam if the at least one serving beam is valid.

13. A method of a UE (User Equipment), comprising:

maintaining at least one serving beam in a serving cell;

determining whether the at least one serving beam is valid when the UE needs to monitor a downlink control channel; and

selecting a specific beam of the serving cell and monitoring the downlink control channel to receive a request for transmitting a random access preamble via the specific beam if the at least one serving beam is not valid.

14. The method of claim 13, wherein uplink of the UE is not synchronized.

15. The method of claim 13, wherein the UE selects the specific beam based on beam reference signal measurement.

16. The method of claim 13, wherein the specific beam is a best beam measured by the UE.

17. The method of claim 13, wherein the UE performs measurement on the least one serving beam to determine whether the at least one serving beam is valid or not.

18. The method of claim 13, wherein the at least one serving beam is not valid if a beam feedback procedure is not continued when uplink of the UE is not synchronized.

19. The method of claim 13, wherein the UE transmits the random access preamble in response to the request.

20. The method of claim 13, wherein the UE monitors the downlink control channel during DRX (Discontinuous Reception) active time.