# US 11,444,817 B2 · Synchronization signal sending method and receiving method, and apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,444,817 B2 - Document ID: US11444817B2 - Status: Granted - Kind: B2 - Application number: 16/860,963 - Filed: 2020-04-28 - Published: 2020-08-13 - Granted: 2022-09-13 - Earliest claimed: 2016-10-10 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Hao Sun; Zheng Chen; Yan Cheng; Lixia Xue - Web page: https://patentgrep.com/patent/US11444817B2 ## CPC - H04L 27/2686: {Range of frequencies or delays tested} - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - 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 27/2672: {Frequency domain} - H04L 27/2676: {Blind, i.e. without using known symbols} - H04W 28/02: Traffic management, e.g. flow control or congestion control - H04W 56/00: Synchronisation arrangements - H04W 56/001: {Synchronization between nodes} - H04W 56/003: {Arrangements to increase tolerance to errors in transmission or reception timing} - 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 This application provides a synchronization signal sending method and receiving method, and an apparatus. In the method, a base station determines a frequency domain position of a target frequency resource based on a frequency interval of synchronization channels, wherein the frequency interval of synchronization channels is 2m times a predefined frequency resource of a physical resource block, and m is a preset nonnegative integer. The base station sends a synchronization signal by using the target frequency resource. ## Claims ### Claim 1 A method, comprising: determining, by a network device, a target frequency resource, wherein a frequency domain position of the target frequency resource meets the following relation: p=offset+n*frequency_interval, wherein p is the frequency domain position of the target frequency resource, offset is a frequency domain position offset, n is an integer, and frequency_interval is a frequency interval of synchronization channels, wherein the frequency interval of synchronization channels meets 2m times 180 kHz or 2m times 360 kHz, and wherein m is a nonnegative integer; and sending, by the network device based on the target frequency resource, a synchronization signal. ### Claim 2 (depends on 1) The method according to claim 1, wherein n is an integer in an integer set that is determined based on a frequency band used by a system. ### Claim 3 (depends on 1) The method according to claim 1, wherein there is a correspondence between at least one of a frequency band used by a system and the frequency domain position offset or the frequency interval of synchronization channels. ### Claim 4 (depends on 1) The method according to claim 1, wherein the frequency domain position of the target frequency resource is a frequency domain position of a center frequency of the target frequency resource, a frequency domain position of a starting frequency of the target frequency resource, or a frequency domain position of an ending frequency of the target frequency resource. ### Claim 5 An apparatus, comprising: at least one memory including executable instructions; and at least one processor; wherein the executable instructions, when executed by the at least one processor, cause the apparatus to: determine a target frequency resource, wherein a frequency domain position of the target frequency resource meets the following relation: p=offset+n*frequency_interval, wherein p is the frequency domain position of the target frequency resource, offset is a frequency domain position offset, n is an integer, and frequency_interval is a frequency interval of synchronization channels, wherein the frequency interval of synchronization channels meets 2m times 180 kHz or 2m times 360 kHz, and wherein m is a nonnegative integer; and send, based on the target frequency resource, a synchronization signal. ### Claim 6 (depends on 5) The apparatus according to claim 5, wherein n is an integer in an integer set that is determined based on a frequency band used by a system. ### Claim 7 (depends on 5) The apparatus according to claim 5, wherein there is a correspondence between at least one of a frequency band used by a system and the frequency domain position offset or the frequency interval of synchronization channels. ### Claim 8 (depends on 5) The apparatus according to claim 5, wherein the frequency domain position of the target frequency resource is a frequency domain position of a center frequency of the target frequency resource, a frequency domain position of a starting frequency of the target frequency resource, or a frequency domain position of an ending frequency of the target frequency resource. ### Claim 9 A non-transitory computer-readable storage medium storing instructions that, when executed by at least one processor, cause a network device to carry out the following: determining a target frequency resource, wherein a frequency domain position of the target frequency resource meets the following relation: p=offset+n*frequency_interval, wherein p is the frequency domain position of the target frequency resource, offset is a frequency domain position offset, n is an integer, and frequency_interval is a frequency interval of synchronization channels, wherein the frequency interval of synchronization channels meets 2m times 180 kHz or 2m times 360 kHz, and wherein m is a nonnegative integer; and sending, based on the target frequency resource, a synchronization signal. ### Claim 10 (depends on 9) The non-transitory computer-readable storage medium according to claim 9, wherein n is an integer in an integer set that is determined based on a frequency band used by a system. ### Claim 11 (depends on 9) The non-transitory computer-readable storage medium according to claim 9, wherein there is a correspondence between at least one of a frequency band used by a system and the frequency domain position offset or the frequency interval of synchronization channels. ### Claim 12 (depends on 9) The non-transitory computer-readable storage medium according to claim 9, wherein the frequency domain position of the target frequency resource is a frequency domain position of a center frequency of the target frequency resource, a frequency domain position of a starting frequency of the target frequency resource, or a frequency domain position of an ending frequency of the target frequency resource. ### Claim 13 (depends on 1) The method according to claim 1, wherein the target frequency resource is on a 3 GHz frequency band, a 4 GHz frequency band, or a 5 GHz frequency band. ### Claim 14 (depends on 5) The apparatus according to claim 5, wherein the target frequency resource is on a 3 GHz frequency band, a 4 GHz frequency band, or a 5 GHz frequency band. ### Claim 15 (depends on 9) The non-transitory computer-readable storage medium according to claim 9, wherein the target frequency resource is on a 3 GHz frequency band, a 4 GHz frequency band, or a 5 GHz frequency band. ### Claim 16 (depends on 2) The method according to claim 2, wherein a value range of m is determined based on the frequency band used by the system. ### Claim 17 (depends on 6) The apparatus according to claim 6, wherein a value range of m is determined based on the frequency band used by the system. ### Claim 18 (depends on 10) The non-transitory computer-readable storage medium according to claim 10, wherein a value range of m is determined based on the frequency band used by the system.