Abstract: The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates beyond 4th-Generation (4G) communication system such as long-term evolution (LTE). An operation method of a base station in a wireless communication system may include obtaining indicators corresponding to a precoder, precoding a signal using the precoder, and transmitting the precoded signal to the terminal. The precoder may include elements defined by a phase value, an exponential value, or a sign, determined by combining variables based on the indicators. The precoder may be determined by searching a first memory storing coefficients for combining the variables corresponding to an antenna port and a layer, a second memory storing a size of a sine wave and cosine wave corresponding to the phase value, or a third memory storing a sign corresponding to a combination of an antenna port or a layer.

Abstract: The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates beyond 4th-Generation (4G) communication system such as long-term evolution (LTE). An operation method of a base station in a wireless communication system may include obtaining indicators corresponding to a precoder, precoding a signal using the precoder, and transmitting the precoded signal to the terminal. The precoder may include elements defined by a phase value, an exponential value, or a sign, determined by combining variables based on the indicators. The precoder may be determined by searching a first memory storing coefficients for combining the variables corresponding to an antenna port and a layer, a second memory storing a size of a sine wave and cosine wave corresponding to the phase value, or a third memory storing a sign corresponding to a combination of an antenna port or a layer.

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.

Abstract: The present specification relates to a precoding-related information transmitting or receiving method and apparatus. A precoder-related information receiving method by a user equipment according to an embodiment of the present specification comprises the steps of: transmitting an aperiodic channel state information (CSI) report; receiving a rank indicator and a first precoder indicator from a base station; acquiring a second precoder indicator included in the most recent aperiodic CSI report which corresponds to the rank indicator in the aperiodic CSI reports transmitted by the user equipment; and receiving a signal using the first precoder indicator and the second precoder indicator. According to an embodiment of the present specification, precoding-related information can be effectively transmitted or received.

Abstract: An Interference Measurement Resource (IMR) allocation method and apparatus for allocating resources for efficient interference measurement in a downlink in a system supporting a New Carrier Type (NCT) is provided. The interference measurement configuration method of a base station transmitting subframes including, or not including, Cell-specific Reference Signals (CRS) in a wireless communication system includes determining whether a terminal supports a New Carrier Type (NCT) subframe, allocating, when the terminal supports the NCT subframe, Interference Measurement Resources (IMR) to the terminal at Resource Elements (REs) where other signals are not mapped in the subframe, transmitting information on the allocated IMR to the terminal, and transmitting the subframe including the allocated IMR to the terminal.

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.

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.

Abstract: The present specification relates to a precoding-related information transmitting or receiving method and apparatus. A precoder-related information receiving method by a user equipment according to an embodiment of the present specification comprises the steps of: transmitting an aperiodic channel state information (CSI) report; receiving a rank indicator and a first precoder indicator from a base station; acquiring a second precoder indicator included in the most recent aperiodic CSI report which corresponds to the rank indicator in the aperiodic CSI reports transmitted by the user equipment; and receiving a signal using the first precoder indicator and the second precoder indicator. According to an embodiment of the present specification, precoding-related information can be effectively transmitted or received.

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.

Abstract: An Interference Measurement Resource (IMR) allocation method and apparatus for allocating resources for efficient interference measurement in a downlink in a system supporting a New Carrier Type (NCT) is provided. The interference measurement configuration method of a base station transmitting subframes including, or not including, Cell-specific Reference Signals (CRS) in a wireless communication system includes determining whether a terminal supports a New Carrier Type (NCT) subframe, allocating, when the terminal supports the NCT subframe, Interference Measurement Resources (IMR) to the terminal at Resource Elements (REs) where other signals are not mapped in the subframe, transmitting information on the allocated IMR to the terminal, and transmitting the subframe including the allocated IMR to the terminal.