CPC H04W 72/23 (2023.01) [H04L 5/0048 (2013.01)] | 16 Claims |
1. A method performed by a terminal operating in a wireless communication system, the method comprising:
receiving, from a base station, Downlink Control Information (DCI) for scheduling a physical downlink shared channel (PDSCH);
determining at least one symbol position for receiving additional demodulation reference signal (DMRS) on the PDSCH, based on a duration between (a) a first symbol of a slot related to the PDSCH and (b) a last symbol of the PDSCH in the slot related to the PDSCH; and
receiving, from the base station, (i) the PDSCH and (ii) the additional DMRS on the at least one symbol position on the PDSCH,
wherein based on that the PDSCH is received before the terminal receives configuration information related to a number of symbol positions for receiving the additional DMRS on the PDSCH:
a value of the number of symbol positions for receiving the additional DMRS on the PDSCH is configured to a specific value or less,
wherein the at least one symbol position is determined further based on the value of the number of symbol positions which is configured to the specific value or less,
wherein the specific value is configured to 2, and
wherein determining the at least one symbol position for receiving the additional DMRS on the PDSCH comprises:
based on (i) the specific value configured to 2 and (ii) the duration between (a) the first symbol of the slot related to the PDSCH and (b) the last symbol of the PDSCH in the slot related to the PDSCH being one of 13 in symbols, or 14 in symbols: determining the at least one symbol position for the additional DMRS as equal to a symbol whose index is 7 and a symbol whose index is 11, in the slot;
based on (i) the specific value configured to 2 and (ii) the duration between (a) the first symbol of the slot related to the PDSCH and (b) the last symbol of the PDSCH in the slot related to the PDSCH being one of 10 in symbols, 11 in symbols or 12 in symbols: determining the at least one symbol position for the additional DMRS as equal to a symbol whose index is band a symbol whose index is 9, in the slot; and
based on (i) the specific value configured to 2 and (ii) the duration between (a) the first symbol of the slot related to the PDSCH and (b) the last symbol of the PDSCH in the slot related to the PDSCH being 9 in symbols: determining the at least one symbol position for the additional DMRS as equal to a symbol whose index is 7, in the slot.
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