Method for reporting reference signal measurement information by terminal in wireless communication system, and apparatus supporting same

• US 10,616,787 B2
• Filed: 08/11/2017
• Issued: 04/07/2020
• Est. Priority Date: 08/11/2016
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Park, Hanjun, Yi, Yunjung
• Primary Examiner(s): Ly, Anh Vu H
• Application Number:
  US16/324,796
• Publication Number:
  US 20190182698A1
• Time in Patent Office: 970 Days
• Field of Search: None
• CPC Class Codes: H04B 17/318 Received signal strength
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 76/15 Setup of multiple wireless link connections

Abstract

Disclosed are: a method for reporting reference signal measurement information for a secondary base station by a terminal, connected to both a master base station and the secondary base station according to a dual connectivity scheme, in a wireless communication system comprising the master base station and the secondary base station that is operated under the control of the master base station and employs multiple analog beams; and an apparatus supporting the same.

Claims

1. A method of reporting reference signal measurement information for a secondary base station by a user equipment, connected to a master base station and the secondary base station by a dual connectivity scheme, in a wireless communication system comprising the master base station and the secondary base station being operated under control of the master base station and operating a plurality of analog beams, the method comprising:

calculating a measurement value according to one or more of;

(i) a first measurement method of measuring signal quality of the secondary base station based on a reference signal transmitted from the secondary base station, or

(ii) a second measurement method of measuring an optimal analog beam for data transmission among a plurality of analog beams operated by the secondary base station; and

transmitting the measurement value according to one or more of the first measurement method or the second measurement method to the master base station or the second base station,

wherein the measurement value calculated according to the first measurement method is transmitted to the master base station and the measurement value calculated according to the second measurement method is transmitted to the secondary base station.

2. The method of claim 1, further comprising:

receiving information regarding the reference signal from the master base station.

3. The method of claim 2, wherein the information regarding the reference signal comprises at least one of:

a time resource on which the reference signal is transmitted,

a frequency resource on which the reference signal is transmitted, or

a sequence applied to the reference signal.

4. The method of claim 1, wherein the measurement value calculated according to the first measurement method comprises at least one of:

(i) information regarding average received power for the reference signal per analog beam, or

(ii) information regarding average received power for the reference signal transmitted by the secondary base station during a predetermined duration.

5. The method of claim 1, wherein when the measurement value calculated according to the first measurement method satisfies a predetermined condition or the master base station commands the user equipment to report a measurement result:

the measurement value calculated according to the first measurement method is transmitted to the master base station.

6. The method of claim 1, wherein the measurement value calculated according to the second measurement method comprises at least one of:

a received strength for the reference signal per analog beam, or

information regarding one or more analog beams, among the plurality of analog beams, having reception performance of at least a predetermined value.

7. The method of claim 1, wherein when the measurement value calculated according to the second measurement method satisfies a specific condition or the secondary base station commands the user equipment to report a measurement result:

the measurement value calculated according to the second measurement method is transmitted to the secondary base station.

8. The method of claim 1, further comprising:

receiving analog beam information during a time duration in which the measurement value according to one or more of the first measurement method or the second measurement method based on the reference signal from the master base station is calculated.

10. The method of claim 8, wherein the analog beam information comprises information regarding an analog beam applied in units of one or more symbols.

11. The method of claim 1, further comprising:

receiving, from the master base station, (i) information as to whether there is a change in an analog beam operation scheme of the secondary base station, and (ii) information regarding a changed serving beam.

12. The method of claim 11, wherein the change in the analog beam operation scheme of the secondary base station comprises a change in an analog phase shift value applied to a serving beam of the secondary base station.

13. The method of claim 1, further comprising:

upon determining that the user equipment and the secondary base station are disconnected, transmitting a signal for requesting a report of the measurement value calculated according to the second measurement method to the master base station; and

receiving a signal for triggering the report of the measurement value calculated according to the second measurement method from the master base station,

wherein the user equipment calculates the measurement value according to the second measurement method, based on the signal for triggering the report of the measurement value calculated according to the second measurement method, and transmits the measurement value according to the second measurement method to the secondary base station.

14. The method of claim 13, wherein when a serving beam of the secondary base station and a hearable beam for detecting a signal transmitted from the secondary base station are different, it is determined that the user equipment and the secondary base station are disconnected.

9. A user equipment for reporting reference signal measurement information for a secondary base station, the user equipment being connected to a master base station and the secondary base station by a dual connectivity scheme, in a wireless communication system comprising the master base station and the secondary base station being operated under control of the master base station and operating a plurality of analog beams, the user equipment comprising:

a transmitter;

a receiver;

at least one processor; and

at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed by the at least one processor, perform operations comprising;

calculating a measurement value according to one or more of;

(i) a first measurement method of measuring signal quality of the secondary base station based on a reference signal transmitted from the secondary base station, or

(ii) a second measurement method of measuring an optimal analog beam for data transmission among a plurality of analog beams operated by the secondary base station; and

transmitting the measurement value according to one or more of the first measurement method or the second measurement method to the master base station or the second base station,

wherein the measurement value calculated according to the first measurement method is transmitted to the master base station and the measurement value calculated according to the second measurement method is transmitted to the secondary base station.