# US 10,873,436 B2 · Data communication method and related apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,873,436 B2 - Document ID: US10873436B2 - Status: Granted - Kind: B2 - Application number: 16/390,333 - Filed: 2019-04-22 - Published: 2019-08-08 - Granted: 2020-12-22 - Earliest claimed: 2014-09-25 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Ningjuan Wang; Xin Xue; Min Yan; Jian Yu - Web page: https://patentgrep.com/patent/US10873436B2 ## CPC - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04B 7/00: Radio transmission systems, i.e. using radiation field (H04B10/00, H04B15/00 take precedence) - H04B 7/24: for communication between two or more posts (wireless communication networks H04W) - H04L 65/611: for multicast or broadcast (systems for broadcast or conference H04L12/18; arrangements for broadcast or distribution combined with broadcast H04H20/00; arrangements for broadcast applications with a direct linkage to broadcast information or to broadcast space-time H04H60/00; selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS], H04W4/06) - H04W 56/005: {compensating for timing error by adjustment in the receiver} - H04W 84/12: WLAN [Wireless Local Area Networks] - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04B: TRANSMISSION - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract An access device constructs a beacon frame, where the beacon frame includes a newly added field, and the newly added field represents multiple data guard interval lengths supported by the access device. The access device broadcasts the beacon frame, so that a terminal selects an available guard interval length matching a data guard interval length supported by the terminal from the beacon frame, and performs data communication with the access device by using the available guard interval length. Data communication between the access device and the terminal can be implemented when the access device supports multiple data guard interval lengths. ## Claims ### Claim 1 A data communication method, the method comprising: encapsulating, by an access device, a first beacon frame into a first protocol data unit that conforms to a first standard; encapsulating, by the access device, a second beacon frame into a second protocol data unit that conforms to a second standard; and broadcasting, by the access device, the first protocol data unit and the second protocol data unit, wherein the first protocol data unit includes a preamble and a first bearer data including the first beacon frame, wherein a guard interval length of the preamble and a guard interval length of the first bearer data is a first guard interval length supported by the access device, wherein the second protocol data unit includes a legacy preamble, a high efficiency wireless local area network preamble, and a second bearer data including the second beacon frame, and wherein a guard interval length of the legacy preamble is the first guard interval length supported by the access device, and a guard interval length of the second bearer data is a second guard interval length supported by the access device. ### Claim 2 (depends on 1) The method according to claim 1, wherein the second guard interval length is a maximum guard interval length supported by the access device in the second standard. ### Claim 3 (depends on 2) The method according to claim 2, wherein the second standard is 802.11ax and the second guard interval length is 3.2 us. ### Claim 4 (depends on 1) The method according to claim 1, wherein the first guard interval length is a maximum guard interval length supported by the access device in the first standard. ### Claim 5 (depends on 4) The method according to claim 4, wherein the first guard interval length is 0.8 us. ### Claim 6 (depends on 1) The method according to claim 1, further comprising: adding, by the access device, an operation field used to indicate a sending time of the second protocol data unit into the first protocol data unit before broadcasting the first protocol data unit and the second protocol data unit by the access device, wherein broadcasting the first protocol data unit and the second protocol data unit by the access device includes: broadcasting, by the access device in a preset period, the first protocol data unit comprising the operation field; and broadcasting, by the access device, the second protocol data unit at the sending time indicated by the operation field. ### Claim 7 An access device comprising: a processor; and a non-transitory storage medium coupled to the processor and storing instructions for execution by the processor, the instructions, when executed by the processor, causing the access device to: encapsulate a first beacon frame into a first standard protocol data unit that conforms to a first standard; encapsulate a second beacon frame into a second protocol data unit that conforms to a second standard; and broadcast the first protocol data unit and the second protocol data unit, wherein the first protocol data unit includes a preamble and a first bearer data including the first beacon frame, wherein a guard interval length of the preamble and a guard interval length of the first bearer data is a first guard interval length supported by the access device, wherein the second protocol data unit includes a legacy preamble, a high efficiency wireless local area network preamble, and a second bearer data including the second beacon frame, and wherein a guard interval length of the legacy preamble is the first guard interval length supported by the access device, and a guard interval length of the second bearer data is a second guard interval length supported by the access device. ### Claim 8 (depends on 7) The access device according to claim 7, wherein the second guard interval length is a maximum guard interval length supported by the access device in the second standard. ### Claim 9 (depends on 8) The access device according to claim 8, wherein the second standard is 802.11ax and the second guard interval length is 3.2 us. ### Claim 10 (depends on 7) The access device according to claim 7, wherein the first guard interval length is a maximum guard interval length supported by the access device in the first standard. ### Claim 11 (depends on 10) The access device according to claim 10, wherein the first guard interval length is 0.8 us. ### Claim 12 (depends on 7) The access device according to claim 7, wherein the storage medium further includes instructions, when being executed by the processor, further causing the access device to: add an operation field used to indicate a sending time of the second protocol data unit into the first protocol data unit; broadcast the first protocol data unit including the operation field in a preset period; and broadcast the second protocol data unit at the sending time indicated by the operation field. ### Claim 13 (depends on 7) The access device according to claim 7, wherein the second beacon frame includes a field, the field comprising: a first bit corresponding to a 3.2 us guard interval length and indicating whether or not the access device supports the 3.2 us guard interval length; and a second bit corresponding to a 0.8 us guard interval length and indicating whether or not the access device supports the 0.8 us guard interval length. ### Claim 14 A non-transitory computer-readable storage medium storing instructions for execution by a processor of an access device, the instructions, when executed by the processor, causing the access device to: encapsulate a first beacon frame into a first protocol data unit that conforms to a first standard; encapsulate a second beacon frame into a second protocol data unit that conforms to a second standard; and broadcast the first protocol data unit and the second protocol data unit, wherein the first protocol data unit includes a preamble and a first bearer data including the first beacon frame, wherein a guard interval length of the preamble and a guard interval length of the first bearer data is a first guard interval length supported by the access device, wherein the second protocol data unit includes a legacy preamble, a high efficiency wireless local area network preamble, and a second bearer data including the second beacon frame, and wherein a guard interval length of the legacy preamble is the first guard interval length supported by the access device, and a guard interval length of the second bearer data is a second guard interval length supported by the access device. ### Claim 15 (depends on 14) The non-transitory computer-readable storage medium according to claim 14, wherein the second guard interval length is a maximum guard interval length supported by the access device in the second standard. ### Claim 16 (depends on 15) The non-transitory computer-readable storage medium according to claim 15, wherein the second standard is 802.11ax and the second guard interval length is 3.2 us. ### Claim 17 (depends on 14) The non-transitory computer-readable storage medium according to claim 14, wherein the first guard interval length is a maximum guard interval length supported by the access device in the first standard. ### Claim 18 (depends on 17) The non-transitory computer-readable storage medium according to claim 17, wherein the first guard interval length is 0.8 us. ### Claim 19 (depends on 14) The non-transitory computer-readable storage medium according to claim 14, wherein the storage medium further includes instructions, when being executed by the processor, further causing the access device to: add an operation field used to indicate a sending time of the second protocol data unit into the first protocol data unit before broadcasting the first protocol data unit and the second protocol data unit, broadcast, in a preset period, the first protocol data unit comprising the operation field; and broadcast, the second protocol data unit at the sending time indicated by the operation field. ### Claim 20 (depends on 14) The non-transitory computer-readable storage medium according to claim 14, wherein the second beacon frame includes a field, the field comprising: a first bit corresponding to a 3.2 us guard interval length and indicating whether or not the access device supports the 3.2 us guard interval length; and a second bit corresponding to a 0.8 us guard interval length and indicating whether or not the access device supports the 0.8 us guard interval length.