# US 10,772,133 B2 · Method and device for determining preamble sequence of physical random access channel > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,772,133 B2 - Document ID: US10772133B2 - Status: Granted - Kind: B2 - Application number: 16/496,947 - Filed: 2018-02-22 - Published: 2020-04-16 - Granted: 2020-09-08 - Earliest claimed: 2017-03-22 - Assignees: China Academy of Telecommunications Technology - Applicants: China Academy of Telecommunications Technology - Inventors: Bin Ren; Ren Da; Fang-Chen Cheng; Ekpenyong Tony - Web page: https://patentgrep.com/patent/US10772133B2 ## CPC - H04J 13/0062: {Zadoff-Chu} - 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} - H04L 27/2607: {Cyclic extensions} - H04W 74/002: {Transmission of channel access control information} - H04W 74/0833: Random access procedures, e.g. with 4-step access - H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S) - 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 Disclosed are a method and device for determining a preamble sequence of a physical random access channel. The method includes in a previous stage, receiving respective preamble sub-sequences, and determining instances of time at which the respective preamble sub-sequences are detected in a detection window; in a current stage, receiving respective preamble sub-sequences, and determining instances of time at which the respective preamble sub-sequences are detected in the detection window; and determining preamble sub-sequences belonging to a same preamble sequence according to the instances of time at which the respective preamble sub-sequences are detected in the current stage, and the instances of time at which the respective preamble sub-sequences are detected in the previous stage. ## Claims ### Claim 1 A method for determining a preamble sequence on a Physical Random Access Channel (PRACH), the method comprising: in a previous stage, receiving respective preamble sub-sequences, and determining instances of time at which the respective preamble sub-sequences are detected in a detection window; in a current stage, receiving respective preamble sub-sequences, and determining instances of time at which the respective preamble sub-sequences are detected in the detection window; and determining preamble sub-sequences belonging to a same preamble sequence according to the instances of time at which the respective preamble sub-sequences are detected in the current stage, and the instances of time at which the respective preamble sub-sequences are detected in the previous stage. ### Claim 2 (depends on 1) The method according to claim 1, wherein the detection window is a Zadoff-Chu (ZC) sequence detection window. ### Claim 3 (depends on 2) The method according to claim 2, wherein the ZC sequence detection window is a ZC sequence detection window of a same root sequence, or a ZC sequence detection window of different root sequences. ### Claim 4 (depends on 1) The method according to claim 1, wherein the instances of time at which the respective preamble sub-sequences are detected in the detection window are detected at timing positions. ### Claim 5 (depends on 1) The method according to claim 1, wherein determining preamble sub-sequences belonging to the same preamble sequence according to the instances of time at which the respective preamble sub-sequences are detected in the current stage, and the instances of time at which the respective preamble sub-sequences are detected in the previous stage comprises: determining an instance of time at which a preamble sub-sequence is detected in the current stage, and an instance of time at which some preamble sub-sequence as preamble sub-sequences belonging to the same preamble sequence in response to that a difference between the instance of time at which the preamble sub-sequence is detected in the current stage, and the instance of time at which the some preamble sub-sequence is detected in the previous stage is below a preset difference threshold. ### Claim 6 A device for determining a preamble sequence on a Physical Random Access Channel (PRACH), the device comprising: a processor configured to read and execute program in a memory to: determine instances of time at which respective preamble sub-sequences are detected in a detection window in a previous stage; determine instances of time at which the respective preamble sub-sequences are detected in the detection window in a current stage; and determine preamble sub-sequences belonging to a same preamble sequence according to the instances of time at which the respective preamble sub-sequences are detected in the current stage, and the instances of time at which the respective preamble sub-sequences are detected in the previous stage; and a transceiver configured to transmit and receive data under the control of the processor is configured to: receive the respective preamble sub-sequences in the previous stage; and receive the respective preamble sub-sequences in the current stage. ### Claim 7 (depends on 6) The device according to claim 6, wherein the processor is further configured to determine the instances of time at which the respective preamble sub-sequences are detected in a ZC sequence detection window. ### Claim 8 (depends on 7) The device according to claim 7, wherein the ZC sequence detection window is a ZC sequence detection window of a same root sequence, or a ZC sequence detection window of different root sequences. ### Claim 9 (depends on 6) The device according to claim 6, wherein the processor is further configured to detect the instances of time at which the respective preamble sub-sequences in the detection window at timing positions. ### Claim 10 (depends on 6) The device according to claim 6, wherein the processor is further configured to determine an instance of time at which a preamble sub-sequence is detected in the current stage, and an instance of time at which some preamble sub-sequence as preamble sub-sequences belonging to the same preamble sequence in response to that a difference between the instance of time at which the preamble sub-sequence is detected in the current stage, and the instance of time at which the some preamble sub-sequence detected in the previous stage is below a preset difference threshold. ### Claim 11 A non-transitory readable storage medium, comprising program codes configured to cause a computing device to: in a previous stage, receive respective preamble sub-sequences, and determine instances of time at which the respective preamble sub-sequences are detected in a detection window; in a current stage, receive respective preamble sub-sequences, and determine instances of time at which the respective preamble sub-sequences are detected in the detection window; and determine preamble sub-sequences belonging to a same preamble sequence according to the instances of time at which the respective preamble sub-sequences are detected in the current stage, and the instances of time at which the respective preamble sub-sequences are detected in the previous stage. ### Claim 12 (depends on 11) The non-transitory readable storage medium according to claim 11, wherein the detection window is a Zadoff-Chu (ZC) sequence detection window. ### Claim 13 (depends on 12) The non-transitory readable storage medium according to claim 12, wherein the ZC sequence detection window is a ZC sequence detection window of a same root sequence, or a ZC sequence detection window of different root sequences. ### Claim 14 (depends on 11) The non-transitory readable storage medium according to claim 11, wherein the instances of time at which the respective preamble sub-sequences are detected in the detection window are detected at timing positions. ### Claim 15 (depends on 11) The non-transitory readable storage medium according to claim 11, wherein the program codes are further configured to cause a computing device to: determine an instance of time at which a preamble sub-sequence is detected in the current stage, and an instance of time at which some preamble sub-sequence as preamble sub-sequences belonging to the same preamble sequence in response to that a difference between the instance of time at which the preamble sub-sequence is detected in the current stage, and the instance of time at which the some preamble sub-sequence is detected in the previous stage is below a preset difference threshold.