Method and apparatus for configuring demodulation reference signal information in wireless cellular communication system
The present disclosure relates to a communication method and system for converging a 5th generation (5G) communication system with a technology for Internet of Things (IoT) to support higher data rates beyond a 4th generation (4G) system. A method of a UE is provided. The method includes receiving, from a base station, configuration information including first information on a number of an additional demodulation reference signal (DMRS) symbol by higher layer signaling, receiving, from the base station, downlink control information (DCI) including second information on a time domain resource, identifying third information on a duration in symbols of a scheduled physical downlink shared channel (PDSCH) resource based on the second information, identifying a position of a DMRS symbol based on the first information and the third information, and receiving, from the base station, at least one DMRS based on the position of the DMRS symbol.
1. A method performed by a terminal in a wireless communication system, the method comprising:
acquiring first information on an additional demodulation reference signal (DM-RS) and second information on a maximum number of symbols for a DM-RS for a physical uplink shared channel (PUSCH);
receiving, from a base station, downlink control information (DCI) for scheduling a PUSCH;
identifying, based on the DCI, third information on symbols duration, fourth information on a mapping type and fifth information on a frequency hopping, for the scheduled PUSCH;
identifying, based on the first information, the second information, the third information, the fourth information and the fifth information, a position of a DM-RS symbol for at least one of the DM-RS and the additional DM-RS; and
transmitting, to the base station, a DM-RS for the PUSCH based on the position of the DM-RS symbol.
2. The method of claim 1 , wherein
in case that the mapping type for the scheduled PUSCH is a first mapping type, a first position of the DM-RS is defined relative to a start of a slot and based on information on a DMRS position, and the information on a DMRS position is a value among 2 or 3, and
in case that the mapping type for the scheduled PUSCH is a second mapping type, a first position of the DM-RS is defined relative to a start of resources for the scheduled PUSCH.
3. The method of claim 2 , wherein the DM-RS for the PUSCH is a front-loaded DM-RS.
4. The method of claim 1 , wherein two consecutive symbols are used for the DM-RS in case that the maximum number of symbols for the DM-RS for the PUSCH is 2 based on the second information.
5. The method of claim 1 , wherein the position of the DM-RS symbol of the additional DM-RS is identified within a value indicated by the first information, based on the symbol duration for the scheduled PUSCH.
6. A method performed by a base station in a wireless communication system, the method comprising:
identifying first information on an additional demodulation reference signal (DM-RS) and second information on a maximum number of symbols for a DM-RS for a physical uplink shared channel (PUSCH);
transmitting, to a terminal, downlink control information (DCI) for scheduling a physical uplink shared channel (PUSCH); and
receiving, from the terminal, a DM-RS for the PUSCH based on a position of a DM-RS symbol for at least one of the DM-RS and the additional DM-RS,
wherein the position of the DM-RS symbol is identified based on the first information, the second information, third information on symbols duration for the scheduled PUSCH, fourth information on a mapping type for the scheduled PUSCH and fifth information on a frequency hopping, for the scheduled PUSCH, the third information, the fourth information and the fifth information being identified based on the DCI.
7. The method of claim 6 , wherein
in case that the mapping type for the scheduled PUSCH is a first mapping type, a first position of the DM-RS is defined relative to a start of a slot and based on information on a DMRS position, and the information on a DMRS position is a value among 2 or 3, and
in case that the mapping type for the scheduled PUSCH is a second mapping type, a first position of the DM-RS is defined relative to a start of resources for the scheduled PUSCH.
8. The method of claim 7 , wherein the DM-RS for the PUSCH is a front-loaded DM-RS.
9. The method of claim 6 , wherein two consecutive symbols are used for the DM-RS in case that the maximum number of symbols for the DM-RS for the PUSCH is 2 based on the second information.
10. The method of claim 6 , wherein the position of the DM-RS symbol of the additional DM-RS is identified within a value indicated by the first information, based on the symbol duration for the scheduled PUSCH.
11. A terminal in a wireless communication system, the terminal comprising:
a transceiver; and
a processor operably connected to the transceiver, the processor configured to:
acquire first information on an additional demodulation reference signal (DM-RS) and second information on a maximum number of symbols for a DM-RS for a physical uplink shared channel (PUSCH),
receive, from a base station, downlink control information (DCI) for scheduling a PUSCH,
identify, based on the DCI, third information on symbols duration, fourth information on a mapping type and fifth information on a frequency hopping, for the scheduled PUSCH,
identify, based on the first information, the second information, the third information, the fourth information and the fifth information, a position of a DM-RS symbol for at least one of the DM-RS and the additional DM-RS, and
transmit, to the base station, a DM-RS for the PUSCH based on the position of the DM-RS symbol.
12. The terminal of claim 11 ,
in case that the mapping type for the scheduled PUSCH is a first mapping type, a first position of the DM-RS is defined relative to a start of a slot and based on information on a DMRS position, and the information on a DMRS position is a value among 2 or 3, and
in case that the mapping type for the scheduled PUSCH is a second mapping type, a first position of the DM-RS is defined relative to a start of resources for the scheduled PUSCH.
13. The terminal of claim 12 , wherein the DM-RS for the PUSCH is a front-loaded DM-RS.
14. The terminal of claim 11 , wherein two consecutive symbols are used for the DM-RS in case that the maximum number of symbols for the DM-RS for the PUSCH is 2 based on the second information.
15. The terminal of claim 11 , wherein the position of the DM-RS symbol of the additional DM-RS is identified within a value indicated by the first information, based on the symbol duration for the scheduled PUSCH.
16. A base station in a wireless communication system, the base station comprising:
a transceiver; and
a processor operably connected to the transceiver, the processor configured to control the transceiver to:
identify first information on an additional demodulation reference signal (DM-RS) and second information on a maximum number of symbols for a DM-RS for a physical uplink shared channel (PUSCH),
transmit, to a terminal, downlink control information (DCI) for scheduling a physical uplink shared channel (PUSCH), and
receive, from the terminal, a DM-RS for the PUSCH based on a position of a DM-RS symbol for at least one of the DM-RS and the additional DM-RS,
wherein the position of the DM-RS symbol is identified based on the first information, the second information, third information on symbols duration for the scheduled PUSCH, fourth information on a mapping type for the scheduled PUSCH and fifth information on a frequency hopping, for the scheduled PUSCH, the third information, the fourth information and the fifth information being identified based on the DCI.
17. The base station of claim 16 , wherein
in case that the mapping type for the scheduled PUSCH is a first mapping type, a first position of the DM-RS is defined relative to a start of a slot and based on information on a DMRS position, and the information on a DMRS position is a value among 2 or 3, and
in case that the mapping type for the scheduled PUSCH is a second mapping type, a first position of the DM-RS is defined relative to a start of resources for the scheduled PUSCH.
18. The base station of claim 17 , wherein the DM-RS for the PUSCH is a front-loaded DM-RS.
19. The base station of claim 16 , wherein two consecutive symbols are used for the DM-RS in case that the maximum number of symbols for the DM-RS for the PUSCH is determined 2 based on the second information.
20. The base station of claim 16 , wherein the position of the DM-RS symbol of the additional DM-RS is identified within a value indicated by the first information, based on the symbol duration for the scheduled PUSCH.