# US 2021/0242993 A1 · Method, device, and system for transmitting and receiving reference signal and data channel in wireless communication system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0242993 A1 - Document ID: US20210242993A1 - Status: Published application - Kind: A1 - Application number: 17/233,766 - Filed: 2021-04-19 - Published: 2021-08-05 - Earliest claimed: 2017-02-03 - Assignees: Wilus Institute of Standards and Technology Inc. - Applicants: Wilus Institute of Standards and Technology Inc. - Inventors: Kyungjun CHOI; Minseok NOH; Jinsam KWAK - Web page: https://patentgrep.com/patent/US20210242993A1 ## CPC - H04L 5/0044: {Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH} - H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)} - H04L 1/00: Arrangements for detecting or preventing errors in the information received {(correcting synchronisation H04L7/00)} - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - H04W 72/04: Wireless resource allocation - H04W 72/12: Wireless traffic scheduling - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Provided is a wireless communication user equipment that wirelessly communicates. The wireless communication user equipment includes a communication module; and a processor configured to control the communication module. The processor is configured to receive a demodulation reference signal (DM-RS) of data channel and receive the data channel based on the DM-RS of the data channel, wherein a time-frequency resource mapped to the DM-RS is predetermined. When the time-frequency resource mapped to the transmission of the DM-RS of the data channel overlaps with the time-frequency resource mapped to a different purpose from the transmission of the DM-RS, the processor is configured not to receive the DM-RS in a resource element (RE) overlapping with the time-frequency resource mapped to the different purpose in the time-frequency resource mapped to the transmission of the DM-RS. The DM-RS is a reference signal specific to the wireless communication device. ## Claims ### Claim at position 1 1-20. (canceled) ### Claim 21 A user equipment of a wireless communication system, the user equipment comprising: a communication module; and a processor configured to control the communication module, wherein the processor is configured to receive a demodulation reference signal (DM-RS) of data channel and receive the data channel based on the received DM-RS of the data channel, wherein a time-frequency resource mapped to a transmission of a DM-RS is predetermined, and wherein when the time-frequency resource mapped to the transmission of the DM-RS of the data channel overlaps with a time-frequency resource mapped to a different purpose from the transmission of the DM-RS, the processor is configured to receive, in an RE of an OFDM symbol located immediately after the time-frequency resource mapped to the different purpose, the DM-RS, wherein the DM-RS is a reference signal specific to the user equipment. ### Claim 22 (depends on 21) The user equipment of claim 21, wherein when the time-frequency resource mapped to the transmission of the DM-RS of the data channel overlaps with the time-frequency resource mapped to the different purpose from the transmission of the DM-RS, the processor is configured to determine whether to receive the DM-RS in a RE located after the time-frequency resource mapped to the different purpose based on whether an additional DM-RS of the data channel is present. ### Claim 23 (depends on 21) The user equipment of claim 21, wherein the DM-RS is a first DM-RS of the data channel. ### Claim 24 (depends on 21) The user equipment of claim 21, wherein when the time-frequency resource mapped to the transmission of the DM-RS of the data channel overlaps with the time-frequency resource mapped to the different purpose from the transmission of the DM-RS, the processor is configured to determine whether to receive the DM-RS in an RE located after the time-frequency resource mapped to the different purpose based on whether a signal quasi-co-located with a port of the DM-RS is present. ### Claim 25 (depends on 21) The user equipment of claim 21, wherein the processor is configured to determine that a signal transmitted through the time-frequency resource mapped to the different purpose is quasi-co-located with the port of the DM-RS, and receive the data channel based on the signal. ### Claim 26 (depends on 25) The user equipment of claim 25, wherein the processor is configured to estimate a state of a channel through which the data channel is transmitted based on the signal transmitted through the time-frequency resource mapped to the different purpose, and demodulate the data channel based on the state of the channel. ### Claim 27 (depends on 26) The user equipment of claim 26, wherein the processor is configured to estimate at least one of a delay spread, a Doppler spread, a Doppler shift, an average gain, and an average delay of a channel through which the data channel is transmitted, based on the signal transmitted through the time-frequency resource mapped to the different purpose. ### Claim 28 (depends on 21) The user equipment of claim 21, wherein the time-frequency resource mapped to the different purpose is a resource emptied without transmission. ### Claim 29 (depends on 21) The user equipment of claim 21, wherein the time-frequency resource mapped to the different purpose is a synchronization signal/physical broadcast channel (SS/PBCH) block, wherein the SS/PBCH block comprises a synchronization signal and information on the wireless communication system. ### Claim 30 (depends on 21) The user equipment of claim 21, wherein the data channel is a physical downlink shared channel (PDSCH). ### Claim 31 (depends on 21) The user equipment of claim 21, wherein the data channel is a physical uplink shared channel (PUSCH). ### Claim 32 A method of operating a user equipment of a wireless communication system, the method comprising: receiving a demodulation reference signal (DM-RS) of data channel and receiving the data channel based on the received DM-RS, wherein a time-frequency resource mapped to a transmission of a DM-RS is predetermined, and when the time-frequency resource mapped to the transmission of the DM-RS of the data channel overlaps with a time-frequency resource mapped to a different purpose from the transmission of the DM-RS, receiving , in an RE of an OFDM symbol located immediately after the time-frequency resource mapped to the different purpose, the DM-RS, wherein the DM-RS is a reference signal specific to the user equipment. ### Claim 33 (depends on 32) The method of claim 32, wherein the DM-RS is a first DM-RS of the data channel. ### Claim 34 (depends on 32) The method of claim 32, wherein the receiving the DM-RS comprises determining whether to receive, in an RE of an OFDM symbol located immediately after transmission of the time-frequency resource mapped to the different purpose based on whether an additional DM-RS of the data channel is present, the DM-RS.