# US 12,114,372 B2 · Method for transmitting and receiving signal in wireless communication system, and device supporting same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,114,372 B2 - Document ID: US12114372B2 - Status: Granted - Kind: B2 - Application number: 17/607,664 - Filed: 2020-05-04 - Published: 2022-07-21 - Granted: 2024-10-08 - Earliest claimed: 2019-05-03 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Hyunsoo Ko; Sukhyon Yoon; Jeongsu Lee - Web page: https://patentgrep.com/patent/US12114372B2 ## CPC - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04W 74/0841: {with collision treatment} - H04L 1/00: Arrangements for detecting or preventing errors in the information received {(correcting synchronisation H04L7/00)} - H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - H04L 5/0064: {Rate requirement of the data, e.g. scalable bandwidth, data priority} - H04L 27/26: Systems using multi-frequency codes (H04L27/32 takes precedence) - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA - H04W 74/004: {in the uplink, i.e. towards network} - H04W 74/0833: Random access procedures, e.g. with 4-step access - H04W 74/0866: {using a dedicated channel for access} - H04L 5/0094: {Indication of how sub-channels of the path are allocated} - H04W 74/0836: with 2-step access - H04W 74/0838: using contention-free random access [CFRA] - 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 According to one aspect of the present disclosure, disclosed are a method for a terminal in a wireless communication system, and a device for supporting same, the method including: transmitting message A related to a random access procedure, message A including a physical random access channel (PRACH) preamble and a physical uplink shared channel (PUSCH); and comprising, in response to the message A, message B related to the random access procedure, wherein a demodulation reference signal (DM-RS) for the PUSCH is transmitted based on a DM-RS port, and wherein the number of the DM-RS ports is {1, 2, 4}. ## Claims ### Claim 1 A method performed by a user equipment (UE) in a wireless communication system, the method comprising: transmitting a message A related to a random access procedure, where the message A comprises a physical random access channel (PRACH) preamble among a plurality of PRACH preambles and a physical uplink shared channel (PUSCH); and in response to the message A, receiving a message B related to the random access procedure, wherein each of the plurality of PRACH preambles is mapped to a demodulation reference signal (DM-RS) resource among a plurality of DM-RS resources related to the PUSCH in increasing order of DM-RS resource indexes, and wherein the DM-RS resource indexes are determined first in an ascending order of a DM-RS port index and second in an ascending order of a DM-RS sequence index. ### Claim 2 (depends on 1) The method according to claim 1, wherein each of the plurality of DM-RS resources is configured in a single orthogonal frequency division multiplexing (OFDM) symbol. ### Claim 3 (depends on 1) The method according to claim 1, wherein the plurality of DM-RS resources are divided into two groups preconfigured in a frequency domain, and wherein the number of the DM-RS ports is a number of DM-RS ports for each group. ### Claim 4 (depends on 3) The method according to claim 3, wherein the PUSCH is transmitted based on a modulation and coding scheme (MCS) level associated with a random access preamble identifier (RAPID) of the PRACH preamble, and wherein the plurality of DM-RS resources are determined to be a group associated with the RAPID from among the preconfigured groups. ### Claim 5 A device configured to operate in a wireless communication system, the device comprising: a memory storing instructions; and at least one processor coupled with the memory and configured to execute the instructions to perform operations comprising: transmitting a message A related to a random access procedure, where the message A comprises a physical random access channel (PRACH) preamble among a plurality of PRACH preambles and a physical uplink shared channel (PUSCH); and in response to the message A, receiving a message B related to the random access procedure, wherein each of the plurality of PRACH preambles is mapped to a demodulation reference signal (DM-RS) resource among a plurality of DM-RS resources related to the PUSCH in increasing order of DM-RS resource indexes, and wherein the DM-RS resource indexes are determined first in an ascending order of a DM-RS port index and second in an ascending order of a DM-RS sequence index. ### Claim 6 (depends on 5) The device according to claim 5, wherein each of the plurality of DM-RS resources is configured in a single orthogonal frequency division multiplexing (OFDM) symbol. ### Claim 7 (depends on 5) The device according to claim 5, wherein the plurality of DM-RS resources are divided into two groups preconfigured in a frequency domain, and wherein the number of the DM-RS ports is a number of DM-RS ports for each group. ### Claim 8 (depends on 7) The device according to claim 7, wherein the PUSCH is transmitted based on a modulation and coding scheme (MCS) level associated with a random access preamble identifier (RAPID) of the PRACH preamble, and wherein the plurality of DM-RS resources is determined to be a group associated with the RAPID from among the preconfigured groups. ### Claim 9 (depends on 5) The device according to claim 5, wherein the device is configured to communicate with at least one of a mobile terminal, a network, or an autonomous vehicle other than a vehicle comprising the device. ### Claim 10 A method performed by a base station (BS) in a wireless communication system, the method comprising: receiving a message A related to a random access procedure, where the message A comprises a physical random access channel (PRACH) preamble among a plurality of PRACH preambles and a physical uplink shared channel (PUSCH); and in response to the message A, transmitting a message B related to the random access procedure, wherein each of the plurality of PRACH preambles is mapped to a demodulation reference signal (DM-RS) resource among a plurality of DM-RS resources related to the PUSCH in increasing order of DM-RS resource indexes, and wherein the DM-RS resource indexes are determined first in an ascending order of a DM-RS port index and second in an ascending order of a DM-RS sequence index. ### Claim 11 A device configured to operate in a wireless communication system, the device comprising: a memory storing instructions; and at least one processor coupled with the memory and configured to execute the instructions to perform operations comprising: receiving a message A related to a random access procedure, where the message A comprises a physical random access channel (PRACH) preamble among a plurality of PRACH preambles and a physical uplink shared channel (PUSCH); and in response to the message A, transmitting a message B related to the random access procedure, wherein each of the plurality of PRACH preambles is mapped to a demodulation reference signal (DM-RS) resource among a plurality of DM-RS resources related to the PUSCH in increasing order of DM-RS resource indexes, and wherein the DM-RS resource indexes are determined first in an ascending order of a DM-RS port index and second in an ascending order of a DM-RS sequence index.