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:
receiving, from a base station, configuration information on a demodulation reference signal (DM-RS), via a radio resource control (RRC) signaling;
receiving, from the base station, downlink control information (DCI) including scheduling information for a physical downlink shared channel (PDSCH);
identifying first information associated with an additional DM-RS based on the configuration information;
identifying a mapping type of the PDSCH based on the DCI;
identifying a position of at least one DM-RS symbol based on the first information, the mapping type, a number of symbols for a DM-RS, and information on a duration in symbols; and
receiving, from the base station, at least one DM-RS based on the position of the at least one DM-RS symbol,
wherein the duration in symbols is determined based on PDSCH resources scheduled by the scheduling information of the DCI.
2 . The method of claim 1 , wherein the configuration information includes information on a maximum number of symbols for the DM-RS, and
wherein in case that the maximum number of symbols for the DM-RS is 2, the number of symbols for the DM-RS is determined as 1 or 2 by the DCI.
3 . The method of claim 2 , wherein in case that the number of symbols for the DM-RS is determined as 1, the first information associated with the additional DM-RS indicates a number of the additional DM-RS as one of 0, 1, 2, or 3, and
wherein in case that the number of symbols for the DM-RS is determined as 2, the first information associated with the additional DM-RS indicates a number of the additional DM-RS as one of 0 or 1.
4 . The method of claim 1 , wherein the mapping type of the PDSCH is one of a type A or a type B.
5 . The method of claim 1 , wherein a position of a front-loaded DM-RS is identified based on position information of the front-loaded DM-RS received on a physical broadcast channel (PBCH), depending on the mapping type of the PDSCH.
6 . A method performed by a base station in a wireless communication system, the method comprising:
transmitting, to a terminal, configuration information on a demodulation reference signal (DM-RS), via a radio resource control (RRC) signaling;
transmitting, to the terminal, downlink control information (DCI) including scheduling information for a physical downlink shared channel (PDSCH); and
transmitting, to the terminal, at least one DM-RS based on a position of at least one DM-RS symbol,
wherein first information associated with an additional DM-RS is identified based on the configuration information,
wherein a mapping type of the PDSCH is identified based on the DCI,
wherein the position of the at least one DM-RS symbol is identified based on first information, the mapping type, a number of symbols for a DM-RS, and information on a duration in symbols, and
wherein the duration in symbols is determined based on PDSCH resources scheduled by the scheduling information of the DCI.
7 . The method of claim 6 , wherein the configuration information includes information on a maximum number of symbols for the DM-RS, and
wherein in case that the maximum number of symbols for the DM-RS is 2, the number of symbols for the DM-RS is determined as 1 or 2 by the DCI.
8 . The method of claim 7 , wherein in case that the number of symbols for the DM-RS is determined as 1, the first information associated with the additional DM-RS indicates a number of the additional DM-RS as one of 0, 1, 2, or 3, and
wherein in case that the number of symbols for the DM-RS is determined as 2, the first information associated with the additional DM-RS indicates a number of the additional DM-RS as one of 0 or 1.
9 . The method of claim 6 , wherein the mapping type of the PDSCH is one of a type A or a type B.
10 . The method of claim 1 , wherein a position of a front-loaded DM-RS is identified based on position information of the front-loaded DM-RS received on a physical broadcast channel (PBCH), depending on the mapping type of the PDSCH.
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:
receive, via the transceiver from a base station, configuration information on a demodulation reference signal (DM-RS), via a radio resource control (RRC) signaling,
receive, via the transceiver from the base station, downlink control information (DCI) including scheduling information for a physical downlink shared channel (PDSCH),
identify first information associated with an additional DM-RS based on the configuration information,
identify a mapping type of the PDSCH based on the DCI,
identify a position of at least one DM-RS symbol based on the first information, the mapping type, a number of symbols for a DM-RS, and information on a duration in symbols, and
receive, via the transceiver from the base station, at least one DM-RS based on the position of the at least one DM-RS symbol,
wherein the duration in symbols is determined based on PDSCH resources scheduled by the scheduling information of the DCI.
12 . The terminal of claim 11 , wherein the configuration information includes information on a maximum number of symbols for the DM-RS, and
wherein in case that the maximum number of symbols for the DM-RS is 2, the number of symbols for the DM-RS is determined as 1 or 2 by the DCI.
13 . The terminal of claim 12 , wherein in case that the number of symbols for the DM-RS is determined as 1, the first information associated with the additional DM-RS indicates a number of the additional DM-RS as one of 0, 1, 2, or 3, and
wherein in case that the number of symbols for the DM-RS is determined as 2, the first information associated with the additional DM-RS indicates a number of the additional DM-RS as one of 0 or 1.
14 . The terminal of claim 11 , wherein the mapping type of the PDSCH is one of a type A or a type B.
15 . The terminal of claim 11 , wherein a position of a front-loaded DM-RS is identified based on position information of the front-loaded DM-RS received on a physical broadcast channel (PBCH), depending on the mapping type of the PDSCH.
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:
transmit, via the transceiver to a terminal, configuration information on a demodulation reference signal (DM-RS), via a radio resource control (RRC) signaling,
transmit, via the transceiver to the terminal, downlink control information (DCI) including scheduling information for a physical downlink shared channel (PDSCH), and
transmit, via the transceiver to the terminal, at least one DM-RS based on a position of at least one DM-RS symbol,
wherein first information associated with an additional DM-RS is identified based on the configuration information,
wherein a mapping type of the PDSCH is identified based on the DCI,
wherein the position of the at least one DM-RS symbol is identified based on first information, the mapping type, a number of symbols for a DM-RS, and information on a duration in symbols, and
wherein the duration in symbols is determined based on PDSCH resources scheduled by the scheduling information of the DCI.
17 . The base station of claim 16 , wherein the configuration information includes information on a maximum number of symbols for the DM-RS, and
wherein in case that the maximum number of symbols for the DM-RS is 2, the number of symbols for the DM-RS is determined as 1 or 2 by the DCI.
18 . The base station of claim 17 , wherein in case that the number of symbols for the DM-RS is determined as 1, the first information associated with the additional DM-RS indicates a number of the additional DM-RS as one of 0, 1, 2, or 3, and
wherein in case that the number of symbols for the DM-RS is determined as 2, the first information associated with the additional DM-RS indicates a number of the additional DM-RS as one of 0 or 1.
19 . The base station of claim 16 , wherein the mapping type of the PDSCH is one of a type A or a type B.
20 . The base station of claim 16 , wherein a position of a front-loaded DM-RS is identified based on position information of the front-loaded DM-RS received on a physical broadcast channel (PBCH), depending on the mapping type of the PDSCH.