Channel state information feedback method and apparatus for 2-dimensional massive MIMO communication system
First Claim
1. A feedback transmission method of a terminal in a mobile communication system, the method comprising:
- receiving configuration information for two reference signal (RS) sets;
receiving feedback configuration information;
identifying reference antenna port information for the two RS sets;
receiving two RSs of the two RS sets from a base station;
estimating a channel between a plurality of antennas of the base station and a plurality of antennas of the terminal based on channels of the received RSs and a relationship between the channels of the received RSs based on a reference antenna port for transmitting both of the received RSs with the same antenna configuration which is indicated by the reference antenna port information; and
transmitting feedback information on the estimated channel based on the feedback configuration information to the base station,wherein the two RS sets are horizontal and vertical direction RSs for the plurality of antennas of the base station being arranged 2-dimensionally,wherein a horizontal channel state information reference signal (H-CSI-RS) of the two RSs is used for estimating, by the terminal, a horizontal angle between the plurality of antennas of the terminal and the plurality of antennas of the base station and a vertical channel state information reference signal (V-CSI-RS) of the two RSs is used for estimating, by the terminal, a vertical angle between the plurality of antennas of the terminal and the plurality of antennas of the base station,wherein the reference antenna port is an overlapped antenna port between at least one antenna port of a first RS set and at least one antenna port of a second RS set, andwherein the feedback information includes at least one of a precoding matrix indicator or a channel quality indicator associated with a codebook for 2-dimensional antenna array.
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Abstract
The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-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).
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Citations
20 Claims
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1. A feedback transmission method of a terminal in a mobile communication system, the method comprising:
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receiving configuration information for two reference signal (RS) sets; receiving feedback configuration information; identifying reference antenna port information for the two RS sets; receiving two RSs of the two RS sets from a base station; estimating a channel between a plurality of antennas of the base station and a plurality of antennas of the terminal based on channels of the received RSs and a relationship between the channels of the received RSs based on a reference antenna port for transmitting both of the received RSs with the same antenna configuration which is indicated by the reference antenna port information; and transmitting feedback information on the estimated channel based on the feedback configuration information to the base station, wherein the two RS sets are horizontal and vertical direction RSs for the plurality of antennas of the base station being arranged 2-dimensionally, wherein a horizontal channel state information reference signal (H-CSI-RS) of the two RSs is used for estimating, by the terminal, a horizontal angle between the plurality of antennas of the terminal and the plurality of antennas of the base station and a vertical channel state information reference signal (V-CSI-RS) of the two RSs is used for estimating, by the terminal, a vertical angle between the plurality of antennas of the terminal and the plurality of antennas of the base station, wherein the reference antenna port is an overlapped antenna port between at least one antenna port of a first RS set and at least one antenna port of a second RS set, and wherein the feedback information includes at least one of a precoding matrix indicator or a channel quality indicator associated with a codebook for 2-dimensional antenna array. - View Dependent Claims (2, 3, 4, 5)
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6. A terminal for transmitting feedback information in a mobile communication system, the terminal comprising:
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a communication unit which is responsible for data communication; and a control unit which is configured to; control to receive configuration information for two reference signal (RS) sets and feedback configuration information, identify reference antenna port information for the two RS sets, receive two RSs of the two RS sets from a base station, estimate a channel between a plurality of antennas of the base station and a plurality of antennas of the terminal based on channels of the received RSs and a relationship between the channels of the received RSs based on a reference antenna port for transmitting both of the received RSs with the same antenna configuration which is indicated by the reference antenna port information, and transmit the feedback information on the estimated channel based on the feedback configuration information to the base station, wherein the two RS sets are horizontal and vertical direction RSs for the plurality of antennas of the base station being arranged 2-dimensionally, wherein a horizontal channel state information reference signal (H-CSI-RS) of the two RSs is used for estimating, by the terminal, a horizontal angle between the plurality of antennas of the terminal and the plurality of antennas of the base station and a vertical channel state information reference signal (V-CSI-RS) of the two RSs is used for estimating, by the terminal, a vertical angle between the plurality of antennas of the terminal and the plurality of antennas of the base station, wherein the reference antenna port is an overlapped antenna port between at least one antenna port of a first RS set and at least one antenna port of a second RS set, and wherein the feedback information includes at least one of a precoding matrix indicator or a channel quality indicator associated with a codebook for 2-dimensional antenna array. - View Dependent Claims (7, 8, 9, 10)
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11. A feedback reception method of a base station in a mobile communication system, the method comprising:
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transmitting configuration information for two reference signal (RS) sets; transmitting feedback configuration information; transmitting two RSs of the two RS sets to a terminal; and receiving feedback information on a channel between a plurality of antennas of the base station and a plurality of antennas of the terminal from the terminal, wherein the feedback information is information on the channel estimated based on channels of the transmitted RSs and a relationship between the channels of the RSs based on a reference antenna port for transmitting both of the RSs with the same antenna configuration which is indicated by reference antenna port information identified by the terminal, wherein the two RS sets are horizontal and vertical direction RSs for the plurality of antennas of the base station being arranged 2-dimensionally, wherein a horizontal channel state information reference signal (H-CSI-RS) of the two RSs is used for estimating, by the terminal, a horizontal angle between the plurality of antennas of the terminal and the plurality of antennas of the base station and a vertical channel state information reference signal (V-CSI-RS) of the two RSs is used for estimating, by the terminal, a vertical angle between the plurality of antennas of the terminal and the plurality of antennas of the base station, wherein the reference antenna port is an overlapped antenna port between at least one antenna port of a first RS set and at least one antenna port of a second RS set, and wherein the feedback information includes at least one of a precoding matrix indicator or a channel quality indicator associated with a codebook for 2-dimensional antenna array. - View Dependent Claims (12, 13, 14, 15)
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16. A base station for receiving feedback information in a mobile communication system, the base station comprising:
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a communication unit which is responsible for data communication; and a control unit which is configured to; control to transmit configuration information for two reference signal (RS) sets and feedback configuration information, and transmit two RSs of the two RS sets to a terminal and receive the feedback information on a channel between a plurality of antennas of the base station and a plurality of antennas of the terminal from the terminal, wherein the feedback information is information on the channel estimated based on channels of the transmitted RSs and a relationship between the channels of the RSs based on a reference antenna port for transmitting both of the RSs with the same antenna configuration which is indicated by reference antenna port information identified by the terminal, wherein the two RS sets are horizontal and vertical direction RSs for the plurality of antennas of the base station being arranged 2-dimensionally, wherein a horizontal channel state information reference signal (H-CSI-RS) of the two RSs is used for estimating, by the terminal, a horizontal angle between the plurality of antennas of the terminal and the plurality of antennas of the base station and a vertical channel state information reference signal (V-CSI-RS) of the two RSs is used for estimating, by the terminal, a vertical angle between the plurality of antennas of the terminal and the plurality of antennas of the base station, wherein the reference antenna port is an overlapped antenna port between at least one antenna port of a first RS set and at least one antenna port of a second RS set, and wherein the feedback information includes at least one of a precoding matrix indicator or a channel quality indicator associated with a codebook for 2-dimensional antenna array. - View Dependent Claims (17, 18, 19, 20)
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Specification