Method for transmitting signals in wireless communication system and apparatus therefor

• US 10,511,364 B2
• Filed: 08/03/2017
• Issued: 12/17/2019
• Est. Priority Date: 08/03/2016
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Youngtae, Seo, Hanbyul, Kim, Kijun, Kang, Jiwon, Lee, Seungmin, Park, Haewook, Park, Jonghyun, Yang, Suckchel, Ko, Hyunsoo
• Primary Examiner(s): Vo, Don N
• Application Number:
  US16/318,114
• Publication Number:
  US 20190305833A1
• Time in Patent Office: 866 Days
• Field of Search: 375267
• CPC Class Codes: H04B 7/0404 the mobile station comprising multiple antennas, e.g. to provide uplink diversity
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04B 7/0456 Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0069 Allocation based on distance or geographical location allocation based on terminal or device properties in general, H04W72/51
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04W 88/02 Terminal devices
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

The present invention relates to a method for transmitting, by a terminal, a signal in a wireless communication system supporting Multiple Input Multiple Output (MIMO) and an apparatus therefor. Specifically, the method comprises the steps for: generating precoded sounding reference signals (SRS) on the basis of N antenna elements combined with M transceivers (where M and N are natural numbers, M<N); and transmitting, to a base station, information on grouped SRSs among the precoded SRSs, wherein the grouped SRSs are associated with SRS ports that the terminal can simultaneously transmitted through the M transceivers.

Claims

1. A method of transmitting a signal, which is transmitted by a user equipment in a wireless communication system supporting MIMO (Multiple Input Multiple Output), comprising the steps of:

generating precoded SRSs (sounding reference signals) based on the N number of antenna elements coupled with the M number of transceivers (wherein M and N correspond to natural numbers, M<

N); and

transmitting information on grouped SRSs among the precoded SRSs to a base station,

wherein the grouped SRSs are associated with SRS ports capable of being simultaneously transmitted by the user equipment via the M number of transceivers.

2. The method of claim 1, wherein the information on the grouped SRSs is designated in advance according to capability of the user equipment.

3. The method of claim 2, wherein the capability of the user equipment is defined according to a coupling structure between the M number of transceivers and the N number of antenna elements.

4. The method of claim 1, wherein the information on the grouped SRSs is indicated by an SRS sequence and wherein the SRS sequence is specified according to the number of SRS ports capable of being simultaneously transmitted by the user equipment.

5. The method of claim 1, further comprising the step of receiving port groups capable of being simultaneously transmitted by the user equipment from the base station,

wherein the information on the grouped SRSs corresponds to the received port groups.

6. The method of claim 5, wherein the port groups are indicated by a downlink beam associated with a receive vector of the base station.

7. The method of claim 5, further comprising the step of receiving a precoding set for the SRSs from the base station.

8. The method of claim 1, wherein the information on the grouped SRSs is configured to be transmitted based on power of a specific value.

9. The method of claim 1, wherein the information on the grouped SRSs is transmitted according to a time offset specifically set to the information on the grouped SRSs.

10. A user equipment transmitting a signal in a wireless communication system supporting MIMO (Multiple Input Multiple Output), comprising:

a radio frequency unit containing the N number of antenna elements coupled with the M number of transceivers; and

a processor, the processor configured to generate precoded SRSs (sounding reference signals) based on the N number of antenna elements coupled with the M number of transceivers (wherein M and N correspond to natural numbers, M<

N), the processor configured to transmit information on grouped SRSs among the precoded SRSs to a base station,

wherein the grouped SRSs are associated with SRS ports capable of being simultaneously transmitted by the user equipment via the M number of transceivers.