Interference measurement method and apparatus for use in mobile communication system
A base station and a method thereof for acquiring channel status information in a mobile communication system operating in a multiuser multiple-input multiple-output transmission mode are provided. The method includes generating and transmitting, to a terminal, interference measurement configuration information for measuring interference caused by signals transmitted from a serving base station of the terminal to at least one other terminal in the transmission mode; and receiving channel status information generated using the transmitted information from the terminal. The present disclosure relates to a communication method and system for converging a 5th-Generation communication system for supporting higher data rates beyond a 4th-Generation system with a technology for Internet of Things, and 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.
1. A method for acquiring channel status information (CSI) by a base station, the method comprising:
identifying whether a plurality of interference measurement resources (IMRs) are assigned to a terminal;
generating interference measurement configuration information for measuring interference in a multi-user multiple-input multiple-output (MU-MIMO) mode based on the identification, the interference being caused by signals transmitted from a serving base station of the terminal to at least one other terminal;
transmitting the generated interference measurement configuration information to the terminal; and
receiving CSI generated using the transmitted interference measurement configuration information from the terminal,
wherein the interference measurement configuration information comprises selection information for selecting at least two IMRs among the plurality of IMRs, the at least two IMRs being used to generate the channel status information in a case that the plurality of IMRs are assigned to the terminal, and wherein the at least two IMRs include a first IMR for measuring the interference in the MU-MIMO mode and a second IMR to be excluded from the interference in the MU-MIMO mode,
wherein the interference in the MU-MIMO mode is calculated by adding the signals addressed to the at least one other terminal and removing a signal addressed to the terminal, in a case that a single IMR is assigned to the terminal, and
wherein a CSI-process is configured with a channel status information reference signal (CSI-RS) and the plurality of IMRs to report the CSI by combining the CSI-RS and the plurality of IMRs.
2. The method of claim 1 , wherein the interference measurement configuration information is transmitted through Radio Resource Control (RRC) signaling.
3. The method of claim 1 , wherein the interference measurement configuration information is transmitted via an aperiodic feedback indicator.
4. A base station for acquiring channel status information (CSI), the base station comprising:
a transceiver; and
a controller coupled to the transceiver and configured to control to:
identify whether a plurality of interference measurement resources (IMRs) are assigned to a terminal;
generate interference measurement configuration information for measuring interference in a multi-user multiple-input multiple-output (MU-MIMO) mode based on the identification, the interference being caused by signals transmitted from a serving base station of the terminal to at least one other terminal;
transmit the interference measurement configuration information to the terminal; and
receive CSI generated using the transmitted interference measurement configuration information from the terminal,
wherein the interference measurement configuration information comprises selection information for selecting at least two IMRs among the plurality of IMRs, the at least two IMRs being used to generate the channel status information in a case that the plurality of IMRs are assigned to the terminal, and wherein the at least two IMRs include at first IMR for measuring the interference in the MU-MIMO mode and a second IMR to be excluded from the interference in the MU-MIMO mode,
wherein the interference in the MU-MIMO mode is calculated by adding the signals addressed to the at least one other terminal and removing a signal addressed to the terminal, in case that a single IMR is assigned to the terminal, and
wherein a CSI-process is configured with a channel status information reference signal (CSI-RS) and the plurality of IMRs to report the CSI by combining the CSI-RS and the plurality of IMRs.
5. The base station of claim 4 , wherein the interference measurement configuration information is transmitted through radio resource control (RRC) signaling.
6. The base station of claim 4 , wherein the interference measurement configuration information is transmitted via an aperiodic feedback indicator.