# US 11,116,014 B2 · Method of transmitting and receiving physical random access channel and device therefor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,116,014 B2 - Document ID: US11116014B2 - Status: Granted - Kind: B2 - Application number: 16/797,170 - Filed: 2020-02-21 - Published: 2020-06-18 - Granted: 2021-09-07 - Earliest claimed: 2017-11-17 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Hyunsoo Ko; Kijun Kim; Eunsun Kim; Sukhyon Yoon - Web page: https://patentgrep.com/patent/US11116014B2 ## CPC - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04W 74/0833: Random access procedures, e.g. with 4-step access - H04L 5/0094: {Indication of how sub-channels of the path are allocated} - H04W 56/001: {Synchronization between nodes} - H04W 72/0446: Resources in time domain, e.g. slots or frames - 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 The present invention discloses a method of transmitting a Physical Random Access Channel (PRACH) by a terminal in a wireless communication system. Specifically, the method includes: receiving first information related to a Synchronization Signal Block (SSB) and second information related to PRACH resources; and transmitting the PRACH on a valid PRACH resource among the PRACH resources based on the first and second information. In this case, valid PRACH resource may be a PRACH resource allocated after symbols in which the SSB is received among the PRACH resources included in a PRACH slot related to the second information. ## Claims ### Claim 1 A method of performing a random access procedure by a User Equipment (UE) in a wireless communication system, the method comprising: receiving information regarding a Physical Random Access Channel (PRACH) resource configuration; transmitting, to a base station (BS), a random access preamble (RAP) based on at least one valid PRACH occasion among a plurality of PRACH occasions in a PRACH slot, wherein the PRACH slot and the plurality of PRACH occasions are configured based on the PRACH resource configuration, wherein at least one Synchronization Signal Block (SSB) can be mapped to the at least one valid PRACH occasion, among the plurality of PRACH occasions, and wherein a PRACH occasion that is located after symbols for a last SSB is determined to be valid from among the plurality of PRACH occasions in the PRACH slot; and receiving, from the BS, a Random Access Response (RAR) in response to the RAP. ### Claim 2 (depends on 1) The method of claim 1, further comprising: receiving information on the at least one SSB to by the UE. ### Claim 3 (depends on 1) The method of claim 1, wherein the at least one valid PRACH occasion is a resource not configured to be used for reception of a downlink signal based on an Uplink/Downlink (UL/DL) configuration. ### Claim 4 (depends on 3) The method of claim 3, wherein the at least one valid PRACH occasion is a resource configured to be used for transmission of an uplink signal based on the UL/DL configuration. ### Claim 5 (depends on 1) The method of claim 1, wherein an interval between the at least one valid PRACH occasion and a last symbol for the last SSB is based on subcarrier spacing for the RAP. ### Claim 6 (depends on 5) The method of claim 5, wherein the interval comprises two symbols based on that the subcarrier spacing is 120 kHz. ### Claim 7 (depends on 1) A non-transitory computer readable medium recorded thereon instructions for performing the method of claim 1. ### Claim 8 A device for wireless communication, the device comprising: at least one processor; and at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations comprising: receiving information regarding a Physical Random Access Channel (PRACH) resource configuration; transmitting, to a base station (BS), a random access preamble (RAP) based on at least one valid PRACH occasion among a plurality of PRACH occasions in a PRACH slot, wherein the PRACH slot and the plurality of PRACH occasions are configured based on the PRACH resource configuration, wherein at least one Synchronization Signal Block (SSB) can be mapped to the at least one valid PRACH occasion, among the plurality of PRACH occasions, and wherein a PRACH occasion that is located after symbols for a last SSB is determined to be valid from among the plurality of PRACH occasions in the PRACH slot, receiving, from the BS, a random access response (RAR) in response to the RAP. ### Claim 9 (depends on 8) The device of claim 8, wherein the operations further comprise: receiving information on the at least one SSB. ### Claim 10 (depends on 8) The device of claim 8, wherein the at least one valid PRACH occasion is a resource not configured to be used for reception of a downlink signal based on an Uplink/Downlink (UL/DL) configuration. ### Claim 11 (depends on 10) The device of claim 10, wherein the at least one valid PRACH occasion is a resource configured to be used for transmission of an uplink signal based on the UL/DL configuration. ### Claim 12 (depends on 8) The device of claim 8, wherein an interval between the at least one valid PRACH occasion and a last symbol for the last SSB is based on subcarrier spacing for the RAP. ### Claim 13 (depends on 12) The device of claim 12, wherein the interval comprises two symbols based on that the subcarrier spacing is 120 kHz. ### Claim 14 (depends on 12) The device of claim 12, further comprising: a transceiver; and wherein the device is a user equipment (UE) for 3rd generation partnership project (3GPP)-based wireless communication. ### Claim 15 (depends on 12) The device of claim 12, wherein the device is an application specific integrated circuit (ASIC) or a digital signal processing device. ### Claim 16 A method of performing a random access procedure by a base station (BS), the method comprising: transmitting information regarding a Physical Random Access Channel (PRACH) resource configuration; receiving, from a user equipment (UE), a random access preamble (RAP) based on at least one valid PRACH occasion among a plurality of PRACH occasions in a PRACH slot; and transmitting, to the UE, a random access response (RAR) in response to the RAP, wherein the PRACH slot and the plurality of PRACH occasions are configured based on the PRACH resource configuration, wherein at least one Synchronization Signal Block (SSB) can be mapped to the at least one valid PRACH occasion, among the plurality of PRACH occasions, and wherein a PRACH occasion that is located after symbols for a last SSB is determined to be valid from among the plurality of PRACH occasions in the PRACH slot. ### Claim 17 A device for wireless communication, the device comprising: at least one processor; and at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations comprising: transmitting information regarding a Physical Random Access Channel (PRACH) resource configuration; receiving, from a user equipment (UE), a random access preamble (RAP) based on at least one valid PRACH occasion among a plurality of PRACH occasions in a PRACH slot; and transmitting, to the UE, a random access response (RAR) in response to the RAP, wherein the PRACH slot and the plurality of PRACH occasions are configured based on the PRACH resource configuration, wherein at least one Synchronization Signal Block (SSB) can be mapped to the at least one valid PRACH occasion, among the plurality of PRACH occasions, and wherein a PRACH occasion that is located after symbols for a last SSB is determined to be valid from among the plurality of PRACH occasions in the PRACH slot.