# US 11,910,231 B2 · Delay measurement 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 11,910,231 B2 - Document ID: US11910231B2 - Status: Granted - Kind: B2 - Application number: 17/231,712 - Filed: 2021-04-15 - Published: 2021-07-29 - Granted: 2024-02-20 - Earliest claimed: 2018-10-16 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Xingxing Hu; Qinghai Zeng; Hongping Zhang; Xing Liu; Feng Han - Web page: https://patentgrep.com/patent/US11910231B2 ## CPC - H04L 43/0858: {One way delays} - H04W 28/04: Error control - H04B 17/364: Delay profiles - H04L 27/26025: {Numerology, i.e. varying one or more of symbol duration, subcarrier spacing, Fourier transform size, sampling rate or down-clocking (allocating sub-channels of the transmission path H04L5/003)} - H04L 43/0864: Round trip delays - H04W 24/08: Testing, {supervising or monitoring} using real traffic - 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 - 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) - H04B: TRANSMISSION ## Abstract The present disclosure relates to delay measurement methods and apparatus. In one example method, a first communications device receives a data unit from a second communications device, where the data unit includes time information, the time information is used to indicate a first moment at which the second communications device sends the data unit, and the time information indicates the first moment based on a part of bits of a frame number. The first communications device determines a delay from the second communications device to the first communications device based on the first moment and a second moment, where the second moment is a moment at which the first communications device receives the data unit. ## Claims ### Claim 1 A delay measurement method, comprising: receiving, by a first communications device, a data unit from a second communications device, wherein the data unit comprises time information, wherein the time information is used to indicate a first moment at which the second communications device sends the data unit, and wherein the time information includes a part of bits of a frame number at the first moment; and determining, by the first communications device, a delay from the second communications device to the first communications device based on the first moment and a second moment, wherein the second moment is a moment at which the first communications device receives the data unit. ### Claim 2 (depends on 1) The method according to claim 1, wherein the part of bits of the frame number comprises last N bits of the frame number, and wherein N is an integer greater than or equal to 1. ### Claim 3 (depends on 1) The method according to claim 1, wherein the time information comprises at least one of the part of bits of the frame number corresponding to the first moment, a subframe number corresponding to the first moment, a slot sequence number corresponding to the first moment, or a symbol sequence number corresponding to the first moment. ### Claim 4 (depends on 1) The method according to claim 1, wherein the time information corresponds to a first subcarrier spacing. ### Claim 5 (depends on 1) The method according to claim 1, wherein the method further comprises: sending, by the first communications device, delay information to the second communications device, wherein the delay information comprises the delay. ### Claim 6 (depends on 1) The method according to claim 1, wherein a value of the part of bits of the frame number at the first moment is N1, a value of the part of bits of the frame number at the second moment is N2, and the delay is determined to be a time unit represented by (N2−N1)*1 frames when N1≤N2. ### Claim 7 (depends on 1) The method according to claim 1, wherein a value of the part of bits of the frame number at the first moment is N1, a value of the part of bits of the frame number at the second moment is N2, the part of bits of the frame number comprises N bits of the frame number, N is an integer greater than or equal to 1, and the delay is determined to be a time unit represented by (2{circumflex over ( )}N−N1+N2)*1 frames when N1>N2. ### Claim 8 A delay measurement method, comprising: sending, by a second communications device, a data unit to a first communications device, wherein the data unit comprises time information, wherein the time information is used to indicate a first moment at which the second communications device sends the data unit, and wherein the time information includes a part of bits of a frame number at the first moment; and receiving, by the second communications device, delay information from the first communications device, wherein the delay information indicates a delay from the second communications device to the first communications device, wherein the delay is determined based on the first moment and a second moment, and wherein the second moment is a moment at which the first communications device receives the data unit. ### Claim 9 (depends on 8) The method according to claim 8, wherein the part of bits of the frame number comprises last N bits of the frame number, and wherein N is an integer greater than or equal to 1. ### Claim 10 (depends on 8) The method according to claim 8, wherein the time information comprises at least one of the part of bits of the frame number corresponding to the first moment, a subframe number corresponding to the first moment, a slot sequence number corresponding to the first moment, or a symbol sequence number corresponding to the first moment. ### Claim 11 (depends on 8) The method according to claim 8, wherein the time information corresponds to a first subcarrier spacing. ### Claim 12 A delay measurement apparatus, wherein the apparatus is a first communications device and comprises: a receiver, the receiver configured to receive a data unit from a second communications device, wherein the data unit comprises time information, wherein the time information is used to indicate a first moment at which the second communications device sends the data unit, and wherein the time information includes a part of bits of a frame number at the first moment; and at least one processor, the at least one processor configured to determine a delay from the second communications device to the first communications device based on the first moment and a second moment, wherein the second moment is a moment at which the first communications device receives the data unit. ### Claim 13 (depends on 12) The apparatus according to claim 12, wherein the part of bits of the frame number comprises last N bits of the frame number, and wherein N is an integer greater than or equal to 1. ### Claim 14 (depends on 12) The apparatus according to claim 12, wherein the time information comprises at least one of the part of bits of the frame number corresponding to the first moment, a subframe number corresponding to the first moment, a slot sequence number corresponding to the first moment, or a symbol sequence number corresponding to the first moment. ### Claim 15 (depends on 12) The apparatus according to claim 12, wherein the time information corresponds to a first subcarrier spacing. ### Claim 16 (depends on 12) The apparatus according to claim 12, wherein the apparatus further comprises a transmitter, the transmitter is configured to send delay information to the second communications device, and wherein the delay information comprises the delay. ### Claim 17 A delay measurement apparatus, wherein the apparatus is a second communications device and comprises: a transmitter, the transmitter configured to send a data unit to a first communications device, wherein the data unit comprises time information, wherein the time information is used to indicate a first moment at which the second communications device sends the data unit, and wherein the time information includes a part of bits of a frame number at the first moment; and a receiver, the receiver configured to receive delay information from the first communications device, wherein the delay information indicates a delay from the second communications device to the first communications device, wherein the delay is determined based on the first moment and a second moment, and wherein the second moment is a moment at which the first communications device receives the data unit. ### Claim 18 (depends on 17) The apparatus according to claim 17, wherein the part of bits of the frame number comprises last N bits of the frame number, and wherein N is an integer greater than or equal to 1. ### Claim 19 (depends on 17) The apparatus according to claim 17, wherein the time information comprises at least one of the part of bits of the frame number corresponding to the first moment, a subframe number corresponding to the first moment, a slot sequence number corresponding to the first moment, or a symbol sequence number corresponding to the first moment. ### Claim 20 (depends on 17) The apparatus according to claim 17, wherein the time information corresponds to a first subcarrier spacing.