Apparatus and method for operating multiple beamforming transceiver in wireless communication system

• US 9,883,514 B2
• Filed: 05/19/2015
• Issued: 01/30/2018
• Est. Priority Date: 09/19/2011
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Original Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Inventors: Park, Jeong-Ho, Jeong, Su-Ryong, Seol, Ji-Yun, Yu, Hyun-Kyu
• Primary Examiner(s): Orgad, Edan
• Assistant Examiner(s): Latorre, Ivan O
• Application Number:
  US14/715,843
• Publication Number:
  US 20150249995A1
• Time in Patent Office: 987 Days
• Field of Search: 370329, 370328, 370323, 370294, 370252, 4554521, 4555501, 4555621, 4554221
• CPC Class Codes: H04B 7/0408 using two or more beams, i.e. beam diversity
• CPC Class Codes: H04B 7/043 using best eigenmode, e.g. beam forming or beam steering
• CPC Class Codes: H04B 7/0632 Channel quality parameters, e.g. channel quality indicator [CQI]
• CPC Class Codes: H04B 7/10 Polarisation diversity; Directional diversity
• CPC Class Codes: H04L 5/0057 Physical resource allocation for CQI
• CPC Class Codes: H04W 16/28 using beam steering
• CPC Class Codes: H04W 72/54 based on quality criteria
• CPC Class Codes: H04W 84/045 using private Base Stations, e.g. femto Base Stations, home Node B

Abstract

A method for operating a base station in a wireless communication system in order to support a plurality of propagation characteristics is provided. The method includes allocating resource periods for respective propagation characteristics, transmitting system information including information on the propagation characteristics, transmitting a reference signal with the propagation characteristic corresponding to the relevant resource period through at least one of the resource periods, and receiving feedback information determining channel qualities for all of the propagation characteristics.

Claims

1. A method for operating a base station in a wireless communication system, the method comprising:

transmitting allocation information for a plurality of beam patterns corresponding to resource periods including a first resource period and a second resource period;

transmitting first reference signals with a first beamwidth in the first resource period;

transmitting second reference signals with a second beamwidth in the second resource period;

receiving feedback information regarding channel quality for at least one of the first reference signals and the second reference signals; and

transmitting data signals through a beam pattern which is identified based on the feedback information among the plurality of beam patterns,

wherein the first beamwidth is different from the second beamwidth.

2. The method of claim 1,

wherein transmitting data signals comprises:

allocating a same time-frequency resource for at least two of the data signals with different polarization characteristics when the identified beam pattern is narrowest among the plurality of beam patterns; and

transmitting the data signals through a resource period corresponding to the identified beam pattern, the resource period comprising the same time-frequency resource, and

wherein the resource periods are allocated to the plurality of beam patterns, respectively.

3. The method of claim 1, further comprising:

transmitting information indicating a number of transmissions of the first reference signals and a number of transmissions of the second reference signals.

4. The method of claim 1,

wherein the first reference signals are transmitted via different beam direction in a sector,

wherein the second reference signals are transmitted via different beam direction in the sector, and

wherein the beam pattern is identified based on a path loss for each of the first reference signals and the second reference signals.

5. The method of claim 1, further comprising:

determining a channel quality for each of the second reference signals, based on a channel quality for each of the first reference signals, a first interference amount measured in the first period, and a second interference amount measured in the second period,

wherein the first beamwidth is widest among beamwidths of the plurality of beam patterns.

6. A method for operating a terminal in a wireless communication system, the method comprising:

receiving allocation information for a plurality of beam patterns corresponding to resource periods including a first resource period and a second resource period;

receiving first reference signals with a first beamwidth in the first resource period;

receiving second reference signals with a second beamwidth in the second resource period;

transmitting feedback information regarding channel quality for at least one of the first reference signals and the second reference signals; and

receiving data signals transmitted through a beam pattern which is identified based on the feedback information, among the plurality of beam patterns,

wherein the first beamwidth is different from the second beamwidth.

7. The method of claim 6,

wherein the resource periods are allocated to the plurality of beam patterns, respectively,

wherein the data signals are received through a resource period corresponding to the identified beam pattern, and

wherein at least two of the data signals with different polarization characteristics are allocated a same time-frequency resource when the identified beam pattern is narrowest among the plurality of beam patterns.

8. The method of claim 6, further comprising:

receiving information indicating a number of transmissions of the first reference signals and a number of transmissions of the second reference signals.

9. The method of claim 6,

wherein the first reference signals are transmitted via different beam direction in a sector,

wherein the second reference signals are transmitted via different beam direction in the sector, and

wherein the beam pattern is identified based on a path loss for each of the first reference signals and the second reference signals.

10. The method of claim 6, further comprising:

transmitting information regarding a first interference amount measured in the first resource period and a second interference amount measured in the second resource period,

wherein a channel quality for each of the second reference signals is determined based on a channel quality for each of the first reference signals, the first interference amount, and the second interference amount, and

wherein the first beamwidth is widest among beamwidths of the plurality of beam patterns.

11. An apparatus of a base station in a wireless communication system, the apparatus comprising:

at least one transceiver; and

at least one processor operatively coupled to the at least one transceiver, wherein the at least one transceiver is configured to;

transmit allocation information for a plurality of beam patterns corresponding to resource periods including a first resource period and a second resource period,

transmit first reference signals with a first beamwidth in the first resource period,

transmit second reference signals with a second beamwidth in the second resource period,

receive feedback information regarding channel quality for at least one of the first reference signals and the second reference signals, and

transmit data signals through a beam pattern which is identified based on the feedback information, among the plurality of beam patterns, and

wherein the first beamwidth is different from the second beamwidth.

12. The apparatus of claim 11,

wherein the at least one processor is further configured to allocate a same time-frequency resource for at least two of the data signals with different polarization characteristics when the identified beam pattern is narrowest among the plurality of beam patterns,

wherein the at least one transceiver is further configured to transmit the data signals through a resource period corresponding to the identified beam pattern, the resource period comprising the same time-frequency resource, and

wherein the resource periods are allocated to the plurality of beam patterns, respectively.

13. The apparatus of claim 11,

wherein the at least one transceiver is further configured to transmit information indicating a number of transmissions of the first reference signals and a number of transmissions of the second reference signals.

14. The apparatus of claim 11,

wherein the first reference signals are transmitted via different beam direction in a sector,

wherein the second reference signals are transmitted via different beam direction in the sector, and

wherein the beam pattern is identified based on a path loss for each of the first reference signals and the second reference signals.

15. The apparatus of claim 11, further comprising:

wherein the at least one processor is further configured to determine a channel quality for each of the second reference signals, based on a channel quality for the first reference signals, a first interference amount measured in the first period, and a second interference amount measured in the second period, and

wherein the first beamwidth is widest among beamwidths of the plurality of beam patterns.

16. An apparatus of a terminal in a wireless communication system, the apparatus comprising:

at least one transceiver; and

at least one processor operatively coupled to the at least one transceiver,

wherein the at least one transceiver is configured to;

receive allocation information for a plurality of beam patterns corresponding to resource periods including a first resource period and a second resource period,

receive first reference signals with a first beamwidth in the first resource period,

receive second reference signals with a second beamwidth in the second resource period,

transmit feedback information regarding channel quality for at least one of the first reference signals and the second reference signals, and

receive data signals transmitted through a beam pattern which is identified based on the feedback information, among the plurality of beam patterns, and

wherein the first beamwidth is different from the second beamwidth.

17. The apparatus of claim 16,

wherein the resource periods are allocated to the plurality of beam patterns, respectively,

wherein the data signals are received through a resource period corresponding to the identified beam pattern, and

wherein at least two of the data signals with different polarization characteristics are allocated a same time-frequency resource when the identified beam pattern is narrowest among the plurality of beam patterns.

18. The apparatus of claim 16,

wherein the at least one transceiver is further configured to receive information indicating a number of transmissions of the first reference signals and a number of transmissions of the second reference signals.

19. The apparatus of claim 16,

wherein the first reference signals are transmitted via different beam direction in a sector,

wherein the second reference signals are transmitted via different beam direction in the sector, and

wherein the beam pattern is identified based on a path loss for each of the first reference signals and the second reference signals.

20. The apparatus of claim 16,

wherein the at least one transceiver is further configured to transmit information regarding a first interference amount measured in the first resource period and a second interference amount measured in the second resource period,

wherein a channel quality for each of the second reference signals is determined based on a channel quality for each of the first reference signals, the first interference amount, and the second interference amount, and

wherein the first beamwidth is widest among beamwidths of the plurality of beam patterns.