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 of a user equipment (UE), the method comprising:
acquiring first information on an additional demodulation reference signal (DM-RS) and second information on a number of a DM-RS symbol based on higher layer signaling from a base station, wherein the number of the DM-RS symbol is 1 or 2;
receiving, from the base station, downlink control information (DCI) including third information on a time domain resource;
identifying fourth information on symbols duration for a scheduled physical downlink shared channel (PDSCH) resource based on the third information;
identifying a position of the DM-RS symbol based on the first information, and the second information and the fourth information; and
receiving, from the base station, at least one DM-RS based on the position of the DM-RS symbol,
wherein a position of an additional DM-RS symbol is identified within a value indicated by the first information, based on the symbols duration for the scheduled PDSCH resource.
2. The method of claim 1 , wherein the position of the DM-RS symbol is identified further based on type information on a PDSCH mapping, the type information being identified based on the third information.
3. The method of claim 2 , wherein the position of the DM-RS symbol is identified further based on position information of a first DM-RS symbol received on a physical broadcast channel (PBCH), depending on the type information.
4. The method of claim 2 , wherein the position of the additional DM-RS symbol is different from the value indicated by the first information in case that the symbols duration for the scheduled PDSCH resource is equal to or less than a predetermined value,
wherein the predetermined value is identified based on the second information, the type information and the first information.
5. A method of a base station, the method comprising:
transmitting, to a user equipment (UE), first information on an additional demodulation reference signal (DM-RS) and second information on a number of a DM-RS symbol based on higher layer signaling, wherein the number of the DM-RS symbol is 1 or 2;
transmitting, to the UE, downlink control information (DCI) including third information on a time domain resource; and
transmitting, to the UE, at least one DM-RS based on a position of the DM-RS symbol,
wherein the position of the DM-RS symbol is identified based on the first information, the second information and fourth information on symbols duration for a scheduled physical downlink shared channel (PDSCH) resource, the fourth information being identified based on the third information,
wherein a position of an additional DM-RS symbol is identified within a value indicated by the first information, based on the symbols duration for the scheduled PDSCH resource.
6. The method of claim 5 , wherein the position of the DM-RS symbol is identified further based on type information on a PDSCH mapping, the type information being identified based on the third information.
7. The method of claim 6 , wherein the position of the DM-RS symbol is identified further based on position information of a first DM-RS symbol transmitted on a physical broadcast channel (PBCH), depending on the type information.
8. The method of claim 6 , wherein the position of the additional DM-RS symbol is different from the value indicated by the first information in case that the symbols duration for the scheduled PDSCH resource is equal to or less than a predetermined value,
wherein the predetermined value is identified based on the second information, the type information and the first information.
9. A user equipment (UE) in a wireless communication system, the UE 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 number of a DM-RS symbol based on higher layer signaling from a base station, wherein the number of the DM-RS symbol is 1 or 2;
control the transceiver to receive, from the base station, downlink control information (DCI) including third information on a time domain resource;
identify fourth information on symbols duration for a scheduled physical downlink shared channel (PDSCH) resource based on the third information;
identify a position of the DM-RS symbol based on the first information, the second information and the fourth information; and
control the transceiver to receive, from the base station, at least one DM-RS based on the position of the DM-RS symbol,
wherein a position of an additional DM-RS symbol is identified within a value indicated by the first information, based on the symbols duration for the scheduled PDSCH resource.
10. The UE of claim 9 , wherein the position of the DM-RS symbol is identified further based on type information on a PDSCH mapping, the type information being identified based on the third information.
11. The UE of claim 10 , wherein the position of the DM-RS symbol is identified further based on position information of a first DM-RS symbol received on a physical broadcast channel (PBCH), depending on the type information.
12. The UE of claim 10 , wherein the position of the additional DM-RS symbol is different from the value indicated by the first information in case that the symbols duration for the scheduled PDSCH resource is equal to or less than a predetermined value,
wherein the predetermined value is identified based on the second information, the type information and the first information.
13. 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:
transmit, to a user equipment (UE), first information on an additional demodulation reference signal (DM-RS) and second information on a number of a DM-RS symbol based on higher layer signaling, wherein the number of the DM-RS symbol is 1 or 2;
transmit, to the UE, downlink control information (DCI) including third information on a time domain resource; and
transmit, to the UE, at least one DM-RS based on a position of the DM-RS symbol,
wherein the position of the DM-RS symbol is identified based on the first information, the second information and fourth information on symbols duration for a scheduled physical downlink shared channel (PDSCH) resource, the fourth information being identified based on the third information,
wherein a position of an additional DM-RS symbol is identified within a value indicated by the first information, based on the symbols duration for the scheduled PDSCH resource.
14. The base station of claim 13 , wherein the position of the DM-RS symbol is identified further based on type information on a PDSCH mapping, the type information being identified based on the third information.
15. The base station of claim 14 , wherein the position of the DM-RS symbol is identified further based on position information of a first DM-RS symbol transmitted on a physical broadcast channel (PBCH), depending on the type information.
16. The base station of claim 14 , wherein the position of the additional DM-RS symbol is different from the value indicated by the first information in case that the symbols duration for the scheduled PDSCH resource is equal to or less than a predetermined value,
wherein the predetermined value is identified based on the second information, the type information and the first information.