# US 12,113,654 B2 · Wireless local area network data transmission 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 12,113,654 B2 - Document ID: US12113654B2 - Status: Granted - Kind: B2 - Application number: 18/518,112 - Filed: 2023-11-22 - Published: 2024-03-21 - Granted: 2024-10-08 - Earliest claimed: 2014-09-19 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Jiayin Zhang; Jun Luo; Phillip Barber - Web page: https://patentgrep.com/patent/US12113654B2 ## CPC - H04L 27/2602: {Signal structure} - H04B 7/26: at least one of which is mobile - H04L 69/22: Parsing or analysis of headers - H04W 28/06: Optimizing {the usage of the radio link}, e.g. header compression, information sizing {, discarding information (system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365)} - H04W 52/02: Power saving arrangements - H04W 74/0816: with collision avoidance - H04L 27/2603: {Signal structure ensuring backward compatibility with legacy system} - H04W 84/12: WLAN [Wireless Local Area Networks] - Y02D 30/70: in wireless communication 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) - 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 Embodiments of the present invention relate to the field of wireless communication, and in particular, to a wireless local area network data transmission method and apparatus, which are used for improving data transmission efficiency. The method of the embodiments of the present invention includes: carrying, by a control domain of a PLCP header domain in a PPDU constructed by an AP, identifier information of the AP, duration information, and an identifier of at least one STA, so that a STA may obtain the identifier information of the AP, the duration information, and the identifier of at least one STA by parsing only the control domain of the PLCP header domain. ## Claims ### Claim 1 A wireless local area network data transmission method, comprising: generating, by an access point, a physical layer protocol data unit (PPDU) of a wireless local area network, wherein the generated PPDU comprises a Physical Layer Convergence Protocol (PLCP) header domain and a data domain, wherein the PLCP header domain comprises a preamble and a control domain, wherein the control domain carries identifier information of the access point, an identifier of at least one station, and duration information, wherein the duration information in the PLCP header domain is for network allocation vector (NAV) setting, wherein the NAV is for protecting transmission of one or more PPDUs subsequent to the generated PPDU in an orthogonal frequency division multiple access (OFDMA) transmission opportunity (TXOP), and wherein a duration indicated by the duration information in the PLCP header domain includes a transmission duration of the one or more PPDUs subsequent to the generated PPDU in the TXOP; and sending, by the access point, the generated PPDU; wherein the data domain of the generated PPDU is transmitted via OFDMA technology, and wherein the data domain of the generated PPDU carries a downlink medium access control protocol data unit (MPDU), and the MPDU comprises a medium access control (MAC) header domain, wherein the MAC header domain of the downlink MPDU carried in the data domain further comprises an OFDMA control field and a frame control field, wherein the frame control field includes: an indicator bit of a protocol version, an indicator bit of a type of a frame, or an indicator bit of a subtype of a frame. ### Claim 2 (depends on 1) The method according to claim 1, wherein the preamble includes a legacy short training field (L-STF), a legacy long training field (L-LTF), and a legacy signal field (L-SIG). ### Claim 3 (depends on 2) The method according to claim 2, wherein the identifier information of the access point is in a high efficiency signal 1 (HE-SIG 1) of the control domain. ### Claim 4 (depends on 3) The method according to claim 3, wherein the identifier of the access point is an identifier of a basic service set (BSS). ### Claim 5 (depends on 4) The method according to claim 4, wherein the duration information indicates an amount of remaining time after the generated PPDU in the TXOP. ### Claim 6 A wireless local area network data transmission method, comprising: receiving, by a station, a physical layer protocol data unit (PPDU) of a wireless local area network from an access point, wherein the received PPDU comprises a Physical Layer Convergence Protocol (PLCP) header domain and a data domain, wherein the PLCP header domain comprises a preamble and a control domain, wherein the control domain carries identifier information of the access point, an identifier of at least one station and duration information, and wherein a duration indicated by the duration information in the PLCP header domain includes a transmission duration of one or more PPDUs subsequent to the received PPDU in an orthogonal frequency division multiple access (OFDMA) transmission opportunity (TXOP); obtaining, by the station, the identifier information of the access point, the identifier of at least one station, and the duration information in the control domain of the received PPDU; and setting, by the station, a network allocation vector (NAV) according to the duration information in the control domain of the PLCP header domain of the received PPDU, wherein the NAV is for protecting transmission of the one or more PPDUs subsequent to the received PPDU in the OFDMA TXOP; wherein the data domain of the received PPDU is received via OFDMA technology, and wherein the data domain of the received PPDU carries a downlink medium access control protocol data unit (MPDU), and the MPDU comprises a medium access control (MAC) header domain, wherein the MAC header domain of the downlink MPDU carried in the data domain further comprises an OFDMA control field and a frame control field, wherein the frame control field includes: an indicator bit of a protocol version, an indicator bit of a type of a frame, or an indicator bit of a subtype of a frame. ### Claim 7 (depends on 6) The method according to claim 6, wherein the preamble includes a legacy short training field (L-STF), a legacy long training field (L-LTF), and a legacy signal field (L-SIG). ### Claim 8 (depends on 7) The method according to claim 7, wherein the identifier information of the access point is in a high efficiency signal 1 (HE-SIG 1) of the control domain. ### Claim 9 (depends on 8) The method according to claim 8, wherein the identifier of the access point is an identifier of a basic service set (BSS). ### Claim 10 (depends on 9) The method according to claim 9, wherein the duration information indicates an amount of remaining time after the received PPDU in the TXOP. ### Claim 11 A station, comprising: a processor; and a non-transitory memory having processor-executable instructions stored thereon; wherein the processor is configured to execute the processor-executable instructions to facilitate the following being performed by the station: receiving a physical layer protocol data unit (PPDU) of a wireless local area network from an access point, wherein the received PPDU comprises a Physical Layer Convergence Protocol (PLCP) header domain and a data domain, wherein the PLCP header domain comprises a preamble and a control domain, wherein the control domain carries identifier information of the access point, an identifier of at least one station and duration information, and wherein a duration indicated by the duration information in the PLCP header domain includes a transmission duration of one or more PPDUs subsequent to the received PPDU in an orthogonal frequency division multiple access (OFDMA) transmission opportunity (TXOP); obtaining the identifier information of the access point, the identifier of at least one station, and the duration information in the control domain of the received PPDU; and setting a network allocation vector (NAV) according to the duration information in the control domain of the PLCP header domain of the received PPDU, wherein the NAV is for protecting transmission of the one or more PPDUs subsequent to the received PPDU in the OFDMA TXOP; wherein the data domain of the received PPDU is received via OFDMA technology, and wherein the data domain of the received PPDU carries a downlink medium access control protocol data unit (MPDU), and the MPDU comprises a medium access control (MAC) header domain, wherein the MAC header domain of the downlink MPDU carried in the data domain further comprises an OFDMA control field and a frame control field, wherein the frame control field includes: an indicator bit of a protocol version, an indicator bit of a type of a frame, or an indicator bit of a subtype of a frame. ### Claim 12 (depends on 11) The station according to claim 11, wherein the preamble includes a legacy short training field (L-STF), a legacy long training field (L-LTF), and a legacy signal field (L-SIG). ### Claim 13 (depends on 12) The station according to claim 12, wherein the identifier information of the access point is in a high efficiency signal 1 (HE-SIG 1) of the control domain. ### Claim 14 (depends on 13) The station according to claim 13, wherein the identifier of the access point is an identifier of a basic service set (BSS). ### Claim 15 (depends on 14) The station according to claim 14, wherein the duration information indicates an amount of remaining time after the received PPDU in the TXOP.