Method and apparatus for calculating beamforming based paging occasion in wireless communication system

• US 10,680,699 B2
• Filed: 07/18/2017
• Issued: 06/09/2020
• Est. Priority Date: 07/20/2016
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Youngdae, Kim, Sangwon, Lee, Jaewook
• Primary Examiner(s): Lai, Andrew
• Assistant Examiner(s): Lee, Andrew C
• Application Number:
  US15/653,292
• Publication Number:
  US 20180026698A1
• Time in Patent Office: 1,057 Days
• CPC Class Codes: H04B 7/043 using best eigenmode, e.g. beam forming or beam steering
• CPC Class Codes: H04B 7/0639 Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
• CPC Class Codes: H04B 7/0695 using beam selection
• CPC Class Codes: H04B 7/1855 using a telephonic control signal, e.g. propagation delay variation, Doppler frequency variation, power variation, beam identification
• CPC Class Codes: H04B 7/2125 Synchronisation

Abstract

According to the present invention, a user equipment (UE) calculates its paging occasion based on a specific beam to monitor paging. In detail, the UE selects at least one beam among multiple beams, calculates a paging occasion consisting of the at least one beam, and monitors a paging in the paging occasion. When the paging occasion consists of the multiple beams including the at least one beam, the paging may be monitored in a part of the paging occasion where the at least one beam is transmitted. Alternatively, when the paging occasion only consists of the at least one beam, the paging may be monitored in all of the paging occasion where the at least one beam is transmitted.

Claims

1. A method performed by a wireless device in a wireless communication system, the method comprising:

receiving, from a base station, reference signals that are transmitted through multiple transmission (Tx) beams of the base station;

determining a paging occasion comprising time intervals for a paging channel monitoring based on an identifier (ID) of the wireless device,

wherein each of the time intervals is mapped to each of the multiple Tx beams of the base station through which the reference signals are transmitted; and

monitoring a paging channel in a time interval among the time intervals in the paging occasion,

wherein the time interval is mapped to a Tx beam of the base station selected by the wireless device among the multiple Tx beams of the base station, and

wherein a same paging is transmitted repeatedly from the base station through the multiple Tx beams of the base station in the time intervals in the paging occasion.

2. The method of claim 1, wherein the selected Tx beam of the base station has a highest quality among the multiple Tx beams of the base station.

3. The method of claim 1, wherein the selected Tx beam of the base station has a quality above a threshold.

4. The method of claim 1, wherein the paging includes a paging message or a paging indicator.

5. The method of claim 4, wherein the paging indicator includes a paging radio network temporary identity (P-RNTI).

6. The method of claim 1, wherein the paging occasion is determined based on a number of the multiple Tx beams of the base station.

7. The method of claim 1, wherein the paging occasion is determined based on a number of beams provided in a cell.

8. The method of claim 7, wherein the paging occasion is determined based on a number of beams in a carrier on which the cell is served.

9. A wireless device in a wireless communication system, the wireless device comprising:

a memory;

a transceiver; and

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

control the transceiver to receive, from a base station, reference signals that are transmitted through multiple transmission (Tx) beams of the base station,

determine a paging occasion comprising time intervals for a paging channel monitoring based on an identifier (ID) of the wireless device, wherein each of the time intervals is mapped to each of the multiple Tx beams of the base station through which the reference signals are transmitted, and

monitor a paging channel in a time interval among the time intervals in the paging occasion,

wherein the time interval is mapped to a Tx beam of the base station selected by the wireless device among the multiple Tx beams of the base station, and

wherein a same paging is transmitted repeatedly from the base station through the multiple Tx beams of the base station in the time intervals in the paging occasion.

10. The wireless device of claim 9, wherein the selected Tx beam of the base station has a quality above a threshold.