METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING CHANNEL STATE INFORMATION

• US 20160352401A1
• Filed: 08/12/2016
• Published: 12/01/2016
• Est. Priority Date: 06/17/2013
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Yu, Hyoungyoul, Kim, Younsun, Lee, Hyojin
• Granted Patent: US 9,912,391 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 7/0456 Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
• CPC Class Codes: H04B 7/0469 taking special antenna structures, e.g. cross polarized antennas into account
• CPC Class Codes: H04B 7/0478 Special codebook structures directed to feedback optimisation
• CPC Class Codes: H04B 7/0486 taking channel rank into account
• 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: H04B 7/065 Variable contents, e.g. long-term or short-short
• CPC Class Codes: H04B 7/10 Polarisation diversity; Directional diversity
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals

Abstract

A communication method of a user equipment in a mobile communication system. The method includes receiving a control signal from a base station, the control signal comprising at least one of: a first information element or a second information element; determining, if a field of the first information element is set to a predetermined value and a channel state information (CSI) reporting mode determined based on the second information element is a redetermined mode, a codebook based on the CSI reporting mode; generating a CSI based on the determined codebook, the CSI comprising at least one of a rank indicator (RI), a first precoding matrix indicator (PMI), or a second PMI; and reporting the generated CSI to the base station.

Claims

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

receiving a control signal from a base station, the control signal including a first information element indicating whether at least one predetermined codebook is being used for deriving channel state information (CSI) feedback and a second information element;

identifying, if a field of the first information element is set to a predetermined value and a CSI reporting mode identified based on the second information element is a predetermined mode, a codebook corresponding to the CSI reporting mode among the at least one predetermined codebook;

generating a CSI based on the identified codebook, the CSI including at least one of information related to a rank indicator (RI), information related to a first precoding matrix indicator (PMI), and information related to a second PMI; and

transmitting the generated CSI to the base station.