# US 12,004,104 B2 · Base station, terminal, random access preamble detection method and random access channel configuration method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,004,104 B2 - Document ID: US12004104B2 - Status: Granted - Kind: B2 - Application number: 18/185,732 - Filed: 2023-03-17 - Published: 2023-07-20 - Granted: 2024-06-04 - Earliest claimed: 2017-05-05 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Chen Qian; Qi Xiong; Bin Yu - Web page: https://patentgrep.com/patent/US12004104B2 ## CPC - H04W 56/001: {Synchronization between nodes} - H04B 7/00: Radio transmission systems, i.e. using radiation field (H04B10/00, H04B15/00 take precedence) - H04B 7/0617: {for beam forming} - 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 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - 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 72/046: {the resource being in the space domain, e.g. beams} - H04W 74/002: {Transmission of channel access control information} - H04W 74/006: {in the downlink, i.e. towards the terminal} - H04W 74/0833: Random access procedures, e.g. with 4-step access - Y02D 30/70: in wireless communication networks - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE ## Abstract The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. Disclosed are a base station and a random access preamble sequence detection method thereof, and a terminal and a random access channel configuration method thereof. ## Claims ### Claim 1 A method performed by a terminal in a wireless communication system, the method comprising: receiving, from a base station, a configuration including a random access channel (RACH) configuration index; identifying a RACH occasion based on the configuration; and transmitting, to the base station, a random access preamble based on the RACH occasion in a system frame, wherein the RACH configuration index indicates a RACH period, wherein an index of the system frame is determined based on mod(Nf, Nperiod)=k, wherein the Nf indicates the index of the system frame, wherein the Nperiod is associated with the RACH period, and wherein the k is an integer associated with the RACH period. ### Claim 2 (depends on 1) The method of claim 1, wherein the RACH period is set as one of 10 ms, 20 ms, 40 ms, 80 ms, and 160 ms. ### Claim 3 (depends on 1) The method of claim 1, wherein the RACH configuration index indicates a preamble format and a starting symbol. ### Claim 4 A method performed by a base station in a wireless communication system, the method comprising: transmitting, to a terminal, a configuration including a random access channel (RACH) configuration index; and receiving, from the terminal, a random access preamble based on a RACH occasion in a system frame, the RACH occasion being identified based on the configuration, wherein the RACH configuration index indicates a RACH period, wherein an index of the system frame is determined based on mod(Nf, Nperiod)=k, wherein the Nf indicates the index of the system frame, wherein the Nperiod is associated with the RACH period, and wherein the k is an integer associated with the RACH period. ### Claim 5 (depends on 4) The method of claim 4, wherein the RACH period is set as one of 10 ms, 20 ms, 40 ms, 80 ms, and 160 ms. ### Claim 6 (depends on 4) The method of claim 4, wherein the RACH configuration index indicates a preamble format and a starting symbol. ### Claim 7 A terminal in a wireless communication system, the terminal comprising: a transceiver; and a controller coupled with the transceiver and configured to: receive, from a base station, a configuration including a random access channel (RACH) configuration index, identify a RACH occasion based on the configuration, and transmit, to the base station, a random access preamble based on the RACH occasion in a system frame, wherein the RACH configuration index indicates a RACH period, wherein an index of the system frame is determined based on mod(Nf, Nperiod)=k, wherein the Nf indicates the index of the system frame, wherein the Nperiod is associated with the RACH period, and wherein the k is an integer associated with the RACH period. ### Claim 8 (depends on 7) The terminal of claim 7, wherein the RACH period is set as one of 10 ms, 20 ms, 40 ms, 80 ms, and 160 ms. ### Claim 9 (depends on 7) The terminal of claim 7, wherein the RACH configuration index indicates a preamble format and a starting symbol. ### Claim 10 A base station in a wireless communication system, the base station comprising: a transceiver; and a controller coupled with the transceiver and configured to: transmit, to a terminal, a configuration including a random access channel (RACH) configuration index, and receive, from the terminal, a random access preamble based on a RACH occasion in a system frame, the RACH occasion being identified based on the configuration, wherein the RACH configuration index indicates a RACH period, wherein an index of the system frame is determined based on mod(Nf, Nperiod)=k, wherein the Nf indicates the index of the system frame, wherein the Nperiod is associated with the RACH period, and wherein the k is an integer associated with the RACH period. ### Claim 11 (depends on 10) The base station of claim 10, wherein the RACH period is set as one of 10 ms, 20 ms, 40 ms, 80 ms, and 160 ms. ### Claim 12 (depends on 10) The base station of claim 10, wherein the RACH configuration index indicates a preamble format and a starting symbol.