Method and apparatus for transmitting/receiving channels in mobile communication system supporting massive MIMO
A channel transmission/reception method and an apparatus for transmitting/receiving channels between a base station and a mobile terminal efficiently in a mobile communication supporting massive Multiple Input Multiple Output (MIMO) transmission are provided. The method includes determining a resource to which a Demodulation Reference Signal (DMRS) addressed to a terminal is mapped within a resource block, the DMRS resource being positioned in at least one of a first resource set capable of being allocated for DMRS and a second resource set symmetric with the first resource set on a time axis, and transmitting the DMRS and DMRS allocation information to the terminal.
1. A method performed by a terminal in a mobile communication system, the method comprising:
receiving, from a base station, downlink scheduling information for downlink data on a physical downlink control channel, the downlink scheduling information including demodulation reference signal (DMRS) configuration information indicating first information on a number of a DMRS group and second information on at least one DMRS antenna port allocated to the terminal;
identifying a resource for the downlink data, wherein a resource of one or more DMRS groups corresponding to the first information is not used for the downlink data; and
receiving, from the base station, the downlink data on the identified resource and a DMRS associated with the at least one DMRS antenna port based on the second information,
wherein a plurality of DMRS groups corresponding to the first information, which is indicated by a first value of the DMRS configuration information, include a first DMRS group and a second DMRS group,
wherein the first DMRS group comprises a DMRS antenna port allocated to the terminal, and
wherein the second DMRS group does not comprise a DMRS antenna port allocated to the terminal.
2. The method of claim 1 , wherein a set of the DMRS group is predefined for each of a plurality of numbers of the DMRS group associated with the first information.
3. The method of claim 1 , wherein the second DMRS group comprises at least one DMRS antenna port allocated to a co-scheduled terminal.
4. The method of claim 1 , wherein in case that single DMRS group corresponds to the first information, which is indicated by a second value of the DMRS configuration information, the single DMRS group includes a DMRS antenna port allocated to the terminal.
5. The method of claim 1 , further comprising:
receiving, from the base station, a DMRS based on a predefined configuration before a reception of a dedicated DMRS configuration for the terminal.
6. The method of claim 1 , wherein the first information and the second information are joint-encoded.
7. 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, the downlink scheduling information including demodulation reference signal (DMRS) configuration information indicating first information on a number of a DMRS group and second information on at least one DMRS antenna port allocated to the terminal; and
transmitting, to the terminal, the downlink data and a DMRS associated with the at least one DMRS antenna port based on the second information,
wherein a resource of one or more DMRS groups corresponding to the first information is not used for the downlink data,
wherein a plurality of DMRS groups corresponding to the first information, which is indicated by a first value of the DMRS configuration information, include a first DMRS group and a second DMRS group,
wherein the first DMRS group comprises a DMRS antenna port allocated to the terminal, and
wherein the second DMRS group does not comprise a DMRS antenna port allocated to the terminal.
8. The method of claim 7 , wherein a set of the DMRS group is predefined for each of a plurality of numbers of the DMRS group associated with the first information.
9. The method of claim 7 , wherein the second DMRS group comprises at least one DMRS antenna port allocated to a co-scheduled terminal.
10. The method of claim 7 , wherein in case that single DMRS group corresponds to the first information, which is indicated by a second value of the DMRS configuration information, the single DMRS group includes a DMRS antenna port allocated to the terminal.
11. The method of claim 7 , further comprising:
transmitting, to the terminal, a DMRS based on a predefined configuration before a transmission of a dedicated DMRS configuration for the terminal.
12. The method of claim 7 , wherein the first information and the second information are joint-encoded.
13. 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, the downlink scheduling information including demodulation reference signal (DMRS) configuration information indicating first information on a number of a DMRS group and second information on at least one DMRS antenna port allocated to the terminal,
identify a resource for the downlink data, wherein a resource of one or more DMRS groups corresponding to the first information is not used for the downlink data, and
receive, from the base station, the downlink data on the identified resource and a DMRS associated with the at least one DMRS antenna port based on the second information,
wherein a plurality of DMRS groups corresponding to the first information, which is indicated by a first value of the DMRS configuration information, include a first DMRS group and a second DMRS group,
wherein the first DMRS group comprises a DMRS antenna port allocated to the terminal, and
wherein the second DMRS group does not comprise a DMRS antenna port allocated to the terminal.
14. The terminal of claim 13 , wherein a set of the DMRS group is predefined for each of a plurality of numbers of the DMRS group associated with the first information.
15. The terminal of claim 13 , wherein the second DMRS group comprises at least one DMRS antenna port allocated to a co-scheduled terminal.
16. The terminal of claim 13 , wherein in case that single DMRS group corresponds to the first information, which is indicated by a second value of the DMRS configuration information, the single DMRS group includes a DMRS antenna port allocated to the terminal.
17. The terminal of claim 13 , wherein the controller is further configured to receive, from the base station, a DMRS based on a predefined configuration before a reception of a dedicated DMRS configuration for the terminal.
18. The terminal of claim 13 , wherein the first information and the second information are joint-encoded.
19. 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, the downlink scheduling information including demodulation reference signal (DMRS) configuration information indicating first information on a number of a DMRS group and second information on at least one DMRS antenna port allocated to the terminal, and
transmit, to the terminal, the downlink data and a DMRS associated with the at least one DMRS antenna port based on the second information,
wherein a resource of one or more DMRS groups corresponding to the first information is not used for the downlink data,
wherein a plurality of DMRS groups corresponding to the first information, which is indicated by a first value of the DMRS configuration information, include a first DMRS group and a second DMRS group,
wherein the first DMRS group comprises a DMRS antenna port allocated to the terminal, and
wherein the second DMRS group does not comprise a DMRS antenna port allocated to the terminal.
20. The base station of claim 19 , wherein a set of the DMRS group is predefined for each of a plurality of numbers of the DMRS group associated with the first information.
21. The base station of claim 19 , wherein the second DMRS group comprises at least one DMRS antenna port allocated to a co-scheduled terminal.
22. The base station of claim 19 , wherein in case that single DMRS group corresponds to the first information, which is indicated by a second value of the DMRS configuration information, the single DMRS group includes a DMRS antenna port allocated to the terminal.
23. The base station of claim 19 , wherein the controller is further configured to transmit, to the terminal, a DMRS based on a predefined configuration before a transmission of a dedicated DMRS configuration for the terminal.
24. The base station of claim 19 , wherein the first information and the second information are joint-encoded.