Method and apparatus for transmitting/receiving channels in mobile communication system supporting massive MIMO

A method performed by a base station in a mobile communication system, the method comprising:

• transmitting, to a terminal, downlink scheduling information for downlink data on a physical downlink control channel, wherein the downlink scheduling information includes demodulation reference signal (DMRS) configuration information indicating a number of a DMRS group and at least one DMRS antenna port allocated to the terminal, and wherein a set of the DMRS group corresponding to the number of the DMRS group comprises one or more DMRS groups that are predefined, and each DMRS group corresponds to a plurality of DMRS antenna ports;
• and
• transmitting, to the terminal, the downlink data and a DMRS associated with the at least one allocated DMRS antenna port,
• wherein resources for the one or more DMRS groups are not used for carrying the downlink data, and
• wherein based on the DMRS configuration information corresponding to a first value, the set of the DMRS group comprises the at least one allocated DMRS antenna port indicated by the DMRS configuration information and at least one DMRS antenna port that is not allocated to the terminal.

A terminal in a mobile communication system, the terminal comprising:

• a transceiver;
• and
• a controller coupled with the transceiver and configured to:
• receive, from a base station, downlink scheduling information for downlink data on a physical downlink control channel, wherein the downlink scheduling information includes demodulation reference signal (DMRS) configuration information indicating a number of a DMRS group and at least one DMRS antenna port allocated to the terminal, and wherein a set of the DMRS group corresponding to the number of the DMRS group comprises one or more DMRS groups that are predefined, and each DMRS group corresponds to a plurality of DMRS antenna ports, and
• receive, from the base station, the downlink data and a DMRS associated with the at least one allocated DMRS antenna port,
• wherein resources for the one or more DMRS groups are not used for carrying the downlink data, and
• wherein, based on the DMRS configuration information corresponding to a first value, the set of the DMRS group comprises the at least one allocated DMRS antenna port indicated by the DMRS configuration information and at least one DMRS antenna port that is not allocated to the terminal.

A base station in a mobile communication system, the base station comprising:

• a transceiver;
• and
• a controller coupled with the transceiver and configured to:
• transmit, to a terminal, downlink scheduling information for downlink data on a physical downlink control channel, wherein the downlink scheduling information includes demodulation reference signal (DMRS) configuration information indicating a number of a DMRS group and at least one DMRS antenna port allocated to the terminal, and wherein a set of the DMRS group corresponding to the number of the DMRS group comprises one or more DMRS groups that are predefined, and each DMRS group corresponds to a plurality of DMRS antenna ports, and
• transmit, to the terminal, the downlink data and a DMRS associated with the at least one allocated DMRS antenna port,
• wherein resources for the one or more DMRS groups are not used for carrying the downlink data, and
• wherein, based on the DMRS configuration information corresponding to a first value, the set of the DMRS group comprises the at least one allocated DMRS antenna port indicated by the DMRS configuration information and at least one DMRS antenna port that is not allocated to the terminal.