CHANNEL STATE INFORMATION FEEDBACK METHOD AND APPARATUS FOR 2-DIMENSIONAL MASSIVE MIMO COMMUNICATION SYSTEM

• US 20150341100A1
• Filed: 05/20/2015
• Published: 11/26/2015
• Est. Priority Date: 05/23/2014
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: LEE, Hyojin, JI, Hyoungju, KIM, Younsun, LEE, Juho, KWAK, Youngwoo
• Granted Patent: US 10,454,555 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04B 7/0478 Special codebook structures directed to feedback optimisation
• CPC Class Codes: H04B 7/0479 for multi-dimensional arrays, e.g. horizontal or vertical pre-distortion matrix index [PMI]
• CPC Class Codes: H04B 7/0626 Channel coefficients, e.g. channel state information [CSI]
• CPC Class Codes: H04B 7/063 Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection
• 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: H04L 25/0224 using sounding signals
• CPC Class Codes: H04L 25/03898 codebook-based design selection of codebook or precoding matrix for MIMO diversity systems H04B7/0456
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver

Abstract

The present disclosure relates to a communication method and system for converging a 5^th-Generation (5G) communication system for supporting higher data rates beyond a 4^th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. A channel state information feedback method and apparatus of a terminal (1200) is provided for measuring channel quality and reporting the measurement result to a base station (1300) in the mobile communication system supporting multi-carrier multiple access scheme such as Orthogonal Frequency Division Multiple Access (OFDMA). A feedback method of a terminal (1200) in a mobile communication system includes acquiring reference antenna port information for at least one Reference Signal (RS), receiving the at least one Reference Signal (RS) from a base station (1300), estimating at least one channel carrying the at least one Reference Signal (RS), and transmitting feedback information on at least one estimated channel to the base station (1200).

Claims

1. A feedback method of a terminal in a mobile communication system, the method comprising:

acquiring reference antenna port information for at least one Reference Signal (RS);

receiving the at least one RS from a base station;

estimating at least one channel carrying the at least one RS; and

transmitting feedback information on the at least one estimated channel to the base station.

2. The method of claim 1, wherein the at least one RS is transmitted through at least one logical antenna port.

3. The method of claim 1, wherein the at least one RS is a horizontal and vertical direction RS for a plurality of antennas being arranged 2-dimensionally.

4. The method of claim 1, wherein the reference antenna port information includes information on the antenna port of the base station which is transmitting the at least one RS.

5. The method of claim 1, wherein the reference antenna port information is acquired through one of a predetermined rule, a Radio Resource Control (RRC) signaling, and Layer 1 (L1) signaling between the base station and the terminal.

6. The method of claim 1, wherein estimating channels comprises:

receiving a parameter indicating a relationship between the at least one RS and the reference antenna port information; and

estimating a channel carrying the RS based on the parameter.

7. A terminal for transmitting feedback information in a mobile communication system, the terminal comprising;

a communication unit which is responsible for data communication; and

a control unit which controls acquiring reference antenna port information for at least one Reference Signal (RS), receiving the at least one RS from a base station, estimating at least one channel carrying the at least one RS, and transmitting feedback information on the at least one estimated channel to the base station.

8. The terminal of claim 7, wherein the at least one RS is transmitted through at least one logical antenna port.

9. The terminal of claim 7, wherein the at least one RS is a horizontal and vertical direction RS for a plurality of antennas being arranged 2-dimensionally.

10. The terminal of claim 7, wherein the reference antenna port information includes information on the antenna port of the base station which is transmitting the at least one RS.

11. The terminal of claim 7, the control unit acquires the reference antenna port information through one of a predetermined rule, a Radio Resource Control (RRC) signaling, and Layer 1 (L1) signaling between the base station and the terminal.

12. The terminal of claim 7, wherein the control unit controls receiving a parameter indicating relationship between the at least one RS with the reference antenna port information and estimating channels carrying the RS based on the parameter.

13. A feedback reception method of a base station in a mobile communication system, the method comprising:

transmitting at least one Reference Signal (RS) to a terminal; and

receiving feedback information on the channel carrying the RS from the terminal,

wherein the feedback information is information on the channel estimated based on a reference antenna port information for the RS acquired by the terminal.

14. The method of claim 13, wherein the at least one RS is transmitted through at least one logical antenna port.

15. The method of claim 13, wherein the at least one RS is a horizontal and vertical direction RS for a plurality of antennas being arranged 2-dimensionally.

16. The method of claim 13, wherein the reference antenna port information includes information on the antenna port of the base station which transmitting the at least one RS.

17. The method of claim 13, wherein the reference antenna port information is acquired through one of a predetermined rule, a Radio Resource Control (RRC) signaling, and Layer 1 (L1) signaling between the base station and the terminal.

18. A base station for receiving feedback from a terminal in a mobile communication system, the base station comprising:

a communication unit which is responsible for data communication; and

a control unit which controls the communication unit to transmit at least one Reference Signal (RS) to a terminal and receive feedback information on the channel carrying the RS from the terminal,

wherein the feedback information is information on the channel estimated based on a reference antenna port information for the RS acquired by the terminal.

19. The base station of claim 18, wherein the at least one RS is transmitted through at least one logical antenna port.

20. The base station of claim 18, wherein the at least one RS is a horizontal and vertical direction RS for a plurality of antennas being arranged 2-dimensionally.

21. The base station of claim 18, wherein the reference antenna port information includes information on the antenna port of the base station which is transmitting the at least one RS.

22. The base station of claim 18, wherein the reference antenna port information is acquired through one of a predetermined rule, a Radio Resource Control (RRC) signaling, and Layer 1 (L1) signaling between the base station and the terminal.