Communication method, communication device and communication system

Abstract

A communication method, a communication device and a communication system are applied to the technical field of communication. The method comprises: an AP generating a PPDU, the PPDU comprising a first field, the duration of the first field being determined by the duration of a first STA adjusting an operating mode (OM) parameter; the AP sends a PPDU, correspondingly, the first STA receives the PPDU, the first field is borne in a first resource unit RU, and the first RU is included in the RU corresponding to the first STA; the first STA adjusts an OM parameter based on the PPDU. Through the embodiment of the invention, the air interface and time overhead can be reduced, and the signaling overhead is saved.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a communication method, a communication device and a communication system. Background Art

[0002] In the 802.11 protocol, the operating mode (OM) of a non-access point (non-AP) station (hereinafter referred to as station STA) can include energy-saving mode (or low-power mode) and non-energy-saving mode (or high-power mode). When there is no data transmission, the STA is in energy-saving mode for listening to save the energy consumption of the STA. The STA switches to the non-energy-saving mode before receiving data to better receive the data. Exemplarily, the STA can switch between energy-saving mode and non-energy-saving mode by switching between a high-capability receiver and a low-capability receiver or adjusting the OM parameters, thereby realizing the energy-saving solution of the STA.

[0003] The access point (AP) can instruct the STA to perform OM switching by requesting to send (RTS) frames or trigger frames. After receiving the RTS frame or trigger frame carrying the OM parameters corresponding to the high power consumption mode, the STA can switch to the high power consumption mode or wake up the high-capability receiver.

[0004] However, in the above method, the air interface and time overhead introduced by the interaction between the AP and the STA, and the repeated parameters included in the RTS frame or the trigger frame and the physical (PHY) protocol data unit (PHY protocol data unit, PPDU) frame, lead to a waste of resources. Summary of the invention

[0005] The embodiments of the present application disclose a communication method, a communication device and a communication system, which can reduce air interface and time overhead and save signaling overhead.

[0006] In a first aspect, an embodiment of the present application provides a communication method, which is applied to an AP or a chip, and the chip is arranged in the AP. The method includes:

[0007] Generate a PPDU, the PPDU includes a first field, the duration of the first field is determined by the duration of the first STA adjusting the operating mode (OM) parameter; send the PPDU, the first field is carried in a first resource unit (RU), and the first RU is included in the RU corresponding to the first STA.

[0008] In an embodiment of the present application, the RU corresponding to the first STA is an RU allocated by the AP to the first STA for transmitting data of the first STA. The first RU is all or part of the RU corresponding to the first STA, that is, the RU that transmits the first field is all or part of the RU corresponding to the first STA. The first STA has energy-saving capabilities, that is, the working mode of the first STA may include energy-saving mode and non-energy-saving mode. For example, the first STA can switch between energy-saving mode and non-energy-saving mode by adjusting the OM parameters. The PPDU can provide the first STA with a time to adjust the OM parameters through the first field, and the duration of the first field is determined by the duration of the first STA adjusting the OM parameters, so that the first STA can adjust the OM parameters during the duration of the first field. The AP and the first STA do not need to interact with RTS frames or trigger frames, which can reduce air interface and time overhead, and will not repeat transmission parameters, saving signaling overhead and avoiding waste of resources.

[0009] In a second aspect, an embodiment of the present application provides a communication method, which is applied to a first STA or a chip, where the chip is arranged in the first STA, and the method includes:

[0010] Receive a PPDU, the PPDU includes a first field, the duration of the first field is determined by the duration of the first STA adjusting the working mode OM parameters, the first field is carried in a first resource unit RU, and the first RU is included in the RU corresponding to the first STA; adjust the OM parameters based on the PPDU.

[0011] In combination with the first aspect or the second aspect, in a possible implementation method, the PPDU includes data of multiple STAs, for example, the PPDU includes a multi-user PPDU (multi user PPDU, MU PPDU), and the first RU is the RU corresponding to the first STA, that is, the first field is transmitted by the RU corresponding to the first STA, and the first field is used to provide the first STA with time to adjust the OM parameters.

[0012] In combination with the first aspect or the second aspect, in a possible implementation, the PPDU is used to transmit data of the first STA, for example, the PPDU includes a single-user PPDU (SU PPDU). The first RU is an RU whose OM parameters need to be adjusted among multiple RUs corresponding to the first STA. When the first STA receives the PPDU, different OM parameters can be used on different RUs, and the first field is used to provide the time for the first STA to adjust the OM parameters corresponding to the first RU. The duration of the first field can be determined according to the duration of the first STA adjusting the OM parameters corresponding to the first RU.

[0013] In combination with the first aspect or the second aspect, in a possible implementation, the PPDU also includes a first signaling SIG field and a first data field, the first field is located between the first SIG field and the first data field, and the first data field is carried on the first RU.

[0014] In the embodiment of the present application, the first SIG field is used to configure the first field, and the first data field is used to transmit data of the first STA. The first field is set between the first SIG field and the first data field, so that the first STA can adjust the OM parameters within the duration of the first field, and receive data based on the adjusted OM parameters on the first data field, thereby ensuring the reliability of the data received by the first STA.

[0015] In combination with the first aspect or the second aspect, in a possible implementation manner, the PPDU further includes a second field, the second field is located after the first field, and the second field includes a short training sequence.

[0016] In the embodiment of the present application, the short training sequence has a short periodicity, and the second field is used for adjusting the automatic gain control (AGC) after the first STA adjusts the OM parameters, so that the first STA can better receive data.

[0017] In combination with the first aspect or the second aspect, in a possible implementation manner, the second field is transmitted by an RU corresponding to at least one STA, and the at least one STA includes the first STA.

[0018] In an embodiment of the present application, the at least one STA is part or all of the multiple STAs that transmit data in the PPDU. Exemplarily, the transmission bandwidth of the second field can be determined by the AP, and the transmission bandwidth includes the RU corresponding to the first STA. That is, the second field can be transmitted over all or part of the transmission bandwidth of the PPDU. For example, at least one STA includes one STA, that is, the second field is transmitted by the RU corresponding to the first STA, which can avoid the impact of the second field on the data transmitted by other STAs and reduce the transmission resource overhead of other STAs. For another example, at least one STA includes all of the multiple STAs, that is, the second field is transmitted over the entire transmission bandwidth of the PPDU, so that the short periodicity of the short training sequence can be avoided from being affected by the data of other STAs, and the reliability of the first STA adjusting the AGC is ensured.

[0019] In combination with the first aspect or the second aspect, in a possible implementation, the PPDU also includes a third field, where the third field is located after the first field, and the third field is used for the first STA to perform channel estimation after adjusting the OM parameters.

[0020] In an embodiment of the present application, the third field may include a long training sequence. The third field is after the first field, so that after the first STA adjusts the OM parameters within the duration of the first field, it can perform channel estimation based on the third field to ensure the reliability of the data received by the first STA.

[0021] In combination with the first aspect or the second aspect, in a possible implementation manner, the third field is transmitted by an RU corresponding to at least one STA, and the at least one STA includes the first STA.

[0022] In an embodiment of the present application, the at least one STA is part or all of the multiple STAs that transmit data in the PPDU. Exemplarily, the transmission bandwidth of the third field can be determined by the AP, and the transmission bandwidth includes the RU corresponding to the first STA. That is, the third field can be transmitted over all or part of the transmission bandwidth of the PPDU. For example, at least one STA includes one STA, that is, the third field is transmitted by the RU corresponding to the first STA, which can avoid the influence of the third field on the data transmitted by other STAs and reduce the transmission resource overhead of other STAs. For another example, at least one STA includes all of the multiple STAs, that is, the third field is transmitted over the entire transmission bandwidth of the PPDU, so that the periodicity of the long training sequence in the third field can be avoided from being affected by the data of other STAs, thereby ensuring the reliability of the channel estimation of the first STA.

[0023] In combination with the first aspect or the second aspect, in a possible implementation, the first field is carried on the RU corresponding to the first STA and the second STA, and the duration of the first field is determined by the duration of adjusting the OM parameters by the first STA and the second STA.

[0024] In the embodiment of the present application, the first field is used to provide the time for the first STA and the second STA to adjust the OM parameters. The duration of the first field is determined by the duration of the first STA and the second STA to adjust the OM parameters. For example, the duration of the first field is greater than or equal to the maximum duration of the first STA and the second STA to adjust the OM parameters, so that the first STA and the second STA can adjust the OM parameters within the duration of the first field.

[0025] In combination with the first aspect or the second aspect, in a possible implementation, the PPDU also includes a fourth field, the duration of the fourth field is determined by the duration of the first field and the duration of the second STA adjusting the OM parameters, the fourth field is located after the first field, and the fourth field is carried on the RU corresponding to the second STA.

[0026] In the embodiment of the present application, when the difference between the durations of adjusting the OM parameters of the first STA and the second STA is greater than the second threshold, the PPDU further includes a fourth field, and the PPDU can provide the first STA with the time for adjusting the OM parameters through the first field, and provide the second STA with the time for adjusting the OM parameters through the first field and the fourth field. The first STA adjusts the OM parameters within the duration of the first field, and the second STA adjusts the OM parameters within the duration of the first field and the fourth field, which can reduce the impact of the duration of adjusting the OM parameters of the second STA on the data transmission of the first STA.

[0027] In combination with the first aspect or the second aspect, in a possible implementation, the PPDU also includes a fifth field and / or a sixth field, the fifth field or the sixth field is after the fourth field, the fifth field includes a short training sequence, and the sixth field includes a long training sequence.

[0028] In an embodiment of the present application, the fifth field is used to adjust the AGC after the second STA adjusts the OM parameters, and the sixth field is used to perform channel estimation after the second STA adjusts the OM parameters, so that the second STA can better receive and demodulate data after adjusting the OM parameters.

[0029] In combination with the first aspect or the second aspect, in a possible implementation manner, the first SIG field includes at least one of the following: the starting position of the first field, the starting position of the second field, the starting position of the third field, the length of the first field, the length of the second field, and the length of the third field.

[0030] In the embodiment of the present application, the starting position of the first field, the starting position of the second field, the starting position of the third field, the length of the first field, the length of the second field, the length of the third field, and other indication information may be included in the common field or user field of the first SIG field. The first SIG field includes at least one of the starting position of the first field, the starting position of the second field, the starting position of the third field, the length of the first field, the length of the second field, and the length of the third field, so that the first STA can determine the position and length of the first field, the second field, or the third field based on the above indication information.

[0031] In combination with the first aspect or the second aspect, in a possible implementation manner, the first field is used to carry data of other STAs other than the first STA.

[0032] In the embodiment of the present application, the first field can carry data of other STAs besides the first STA, so that the first field can be fully utilized and waste of resources can be avoided.

[0033] In combination with the first aspect or the second aspect, in a possible implementation manner, the first SIG field carries third indication information, and the third indication information is used to indicate that the first field carries data of a third STA.

[0034] In the embodiment of the present application, the third STA is a STA that does not need to adjust the OM parameters among multiple STAs that transmit PPDU data. For example, the third STA may include a STA in a non-energy-saving mode. The first field carries data of the third STA, and the third indication information can indicate that the third STA receives data on the RU corresponding to the first STA within the duration of the first field.

[0035] In combination with the first aspect or the second aspect, in a possible implementation, the first SIG field includes a first user field, the first user field carries third indication information and identification information of a third STA, and the RU corresponding to the first user field is included in the RU corresponding to the first STA.

[0036] In the embodiment of the present application, the RU corresponding to the first user field may be all or part of the RU corresponding to the first STA. That is, during the duration of the first field, the data of the third STA may be transmitted on all or part of the RU corresponding to the first STA. The third STA may determine that the first field carries its data by detecting the first user field in the first SIG field.

[0037] In combination with the first aspect or the second aspect, in a possible implementation manner, a difference between a center frequency point of an RU corresponding to the third STA and an RU corresponding to the first STA is less than a first threshold.

[0038] In the embodiment of the present application, the RU corresponding to the third STA is adjacent to the RU corresponding to the first STA, and the first threshold can be determined by the bandwidth range of the RUs corresponding to the first STA and the third STA. The third STA only needs to detect the user field adjacent to the user field corresponding to the third STA to determine whether the first field carries the data of the third STA, without detecting all user fields in the first SIG field, which can reduce the resource waste of the third STA.

[0039] In combination with the first aspect or the second aspect, in a possible implementation manner, the first field is used to carry first data of the first STA, and the OM parameters corresponding to the first data carried by the first field include the OM parameters of the first STA before adjustment.

[0040] In an embodiment of the present application, the OM parameter corresponding to the first data is the OM parameter used by the first STA when receiving the first data. The first field carries the first data of the first STA. The first STA can use the OM parameter before adjustment to receive the first data, thereby making reasonable use of resources and avoiding waste of resources.

[0041] In combination with the first aspect or the second aspect, in a possible implementation method, the first data field in the PPDU is used to carry the first data, the first data field is located after the first field, and the OM parameters corresponding to the first data carried by the first data field include the OM parameters after adjustment of the first STA.

[0042] In an embodiment of the present application, after the first STA completes the OM parameter adjustment, it repeatedly transmits the first data carried by the first field, so that the first STA can demodulate the data received twice, improve the reliability of the data, and support a longer transmission distance.

[0043] In combination with the first aspect or the second aspect, in a possible implementation manner, the first field includes at least one of the following: a random sequence, a legacy short training sequence field (legacy-short training field, L-STF), a legacy long training sequence field (legacy-long training field, L-LTF), an ultra-high reliability short training sequence field (ultrahigh reliability-short training field, UHR-STF), and an ultra-high reliability long training sequence field (ultrahigh reliability-long training field, UHR-LTF).

[0044] In an embodiment of the present application, the first field can carry a long training sequence or a short training sequence, so that when the first STA completes the adjustment of the OM parameters before the termination time of the first field, it can adjust the AGC or perform channel estimation based on the long training sequence or the short training sequence.

[0045] In combination with the first aspect or the second aspect, in a possible implementation manner, the PPDU also includes first indication information, where the first indication information is used to instruct the first STA to adjust the OM parameter.

[0046] In combination with the first aspect or the second aspect, in a possible implementation manner, the method further includes:

[0047] A block acknowledgment (BA) frame is received, where the BA frame includes second indication information, where the second indication information is used to indicate a duration for the first STA to adjust the OM parameter.

[0048] In an embodiment of the present application, the second indication information is used to indicate the duration of the last adjustment of the OM parameters by the first STA, or the second indication information is used to indicate the maximum duration of the adjustment of the OM parameters by the first STA. The maximum duration of the adjustment of the OM parameters by the first STA can be determined by the capability of the first STA, or by the duration of the historical adjustment of the OM parameters by the first STA. After receiving the PPDU, the first STA can reply to the AP with a BA frame, and carry indication information of the duration of the adjustment of the OM parameters in the BA frame, so that the AP can adjust the duration of the first field based on the second indication information.

[0049] In combination with the first aspect or the second aspect, in a possible implementation manner, the OM parameter includes at least one of the following: modulation and coding scheme MCS, number of spatial streams NSS, bandwidth, transmit power, and receive frequency.

[0050] In combination with the second aspect, in a possible implementation manner, adjusting the OM parameter based on the PPDU includes:

[0051] When the first SIG field of the PPDU contains a user field corresponding to the first STA or the OM parameter indicated by the PPDU is different from the current OM parameter of the first STA or OM parameter adjustment indication information is received, the OM parameter is adjusted based on the PPDU.

[0052] In combination with the second aspect, in a possible implementation method, the starting time when the first STA adjusts the OM parameters includes any one of the following items: the time when the first STA detects that the first signaling SIG field contains a user field corresponding to the first STA, the time when the first STA completes detecting the first signaling SIG field, and the starting time of the first field.

[0053] In a third aspect, an embodiment of the present application provides a communication device, which is used to execute the method in the first aspect or any possible implementation of the first aspect. The communication device includes a unit having the function of executing the method in the first aspect or any possible implementation of the first aspect.

[0054] In a fourth aspect, an embodiment of the present application provides a communication device, which is used to execute the method in the second aspect or any possible implementation of the second aspect. The communication device includes a unit having the function of executing the method in the second aspect or any possible implementation of the second aspect.

[0055] In the third aspect and the fourth aspect, the above communication device and the communication device may include a transceiver unit and a processing unit. For a detailed description of the transceiver unit and the processing unit, reference may also be made to the device embodiment shown below.

[0056] In a fifth aspect, an embodiment of the present application provides a communication device, the communication device comprising a processor, configured to execute the method described in any one of the first to second aspects or any possible implementation. Alternatively, the processor is configured to execute a program stored in a memory, and when the program is executed, the method described in any one of the first to second aspects or any possible implementation is executed.

[0057] In a possible implementation manner, the memory is located outside the above communication device.

[0058] In a possible implementation manner, the memory is located within the above-mentioned communication device.

[0059] In the embodiment of the present application, the processor and the memory may also be integrated into one device, that is, the processor and the memory may also be integrated together.

[0060] In a possible implementation manner, the communication device further includes a transceiver, where the transceiver is used to receive a signal or send a signal.

[0061] In a sixth aspect, an embodiment of the present application provides a communication device, which includes a logic circuit and an interface, wherein the logic circuit and the interface are coupled; the logic circuit is used to generate a PPDU; and the interface is used to output the PPDU.

[0062] It can be understood that with respect to the communication device shown in the sixth aspect, reference can also be made to the first aspect or the specific implementation shown below.

[0063] In a seventh aspect, an embodiment of the present application provides a communication device, which includes a logic circuit and an interface, wherein the logic circuit and the interface are coupled; the interface is used to input PPDU; and the logic circuit is used to adjust OM parameters based on PPDU.

[0064] It can be understood that with respect to the communication device shown in the seventh aspect, reference can also be made to the second aspect or the specific implementation shown below.

[0065] In an eighth aspect, an embodiment of the present application provides a computer-readable storage medium, which is used to store a computer program. When the computer program is run on a computer, the method shown in any aspect of the first to second aspects or any possible implementation is executed.

[0066] In a ninth aspect, an embodiment of the present application provides a computer program product, which includes a computer program. When the computer program is run on a computer, the method shown in any aspect of the first to second aspects or any possible implementation is executed.

[0067] In a tenth aspect, an embodiment of the present application provides a computer program. When the computer program is run on a computer, the method shown in any aspect of the first to second aspects or any possible implementation is executed.

[0068] In the eleventh aspect, an embodiment of the present application provides a communication system, which includes a first communication device and a second communication device, the first communication device is used to execute the method shown in the above-mentioned first aspect or any possible implementation of the first aspect, and the second communication device is used to execute the method shown in the above-mentioned second aspect or any possible implementation of the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] The following is an introduction to the drawings related to the embodiments of the present application.

[0070] Figure 1 It is a structural diagram of a communication system provided in an embodiment of the present application;

[0071] Figure 2 It is a structural diagram of an AP and a STA provided in an embodiment of the present application;

[0072] Figure 3 This is a flow chart of interaction between an AP and a STA provided in an embodiment of the present application;

[0073] Figure 4 It is a flow chart of a communication method provided in an embodiment of the present application;

[0074] Figure 5A and Figure 5B It is a structural diagram of a PPDU provided in an embodiment of the present application;

[0075] Figure 6 It is a schematic diagram of the structure of another PPDU provided in an embodiment of the present application;

[0076] Figure 7 This is a schematic diagram of the structure of another PPDU provided in an embodiment of the present application;

[0077] Figure 8 This is a schematic diagram of the structure of another PPDU provided in an embodiment of the present application;

[0078] Fig. 9 This is a schematic diagram of the structure of another PPDU provided in an embodiment of the present application;

[0079] Fig.10 This is a schematic diagram of the structure of another PPDU provided in an embodiment of the present application;

[0080] Fig.11A and Fig. 11B This is a schematic diagram of the structure of another PPDU provided in an embodiment of the present application;

[0081] Fig.12 This is a schematic diagram of the structure of another PPDU provided in an embodiment of the present application;

[0082] Fig.13 This is a schematic diagram of the structure of a first SIG field provided in an embodiment of the present application;

[0083] Fig.14 This is a schematic diagram of the structure of another PPDU provided in an embodiment of the present application;

[0084] Fig.15A and Fig. 15B It is a structural diagram of a user field provided in an embodiment of the present application;

[0085] Fig.16A and Fig. 16B It is a structural diagram of a user field provided in an embodiment of the present application;

[0086] Fig.17A and Fig. 17B It is a structural diagram of a user field provided in an embodiment of the present application;

[0087] Fig.18 is a structural diagram of a communication device provided in an embodiment of the present application;

[0088] Fig.19 is a structural diagram of a communication device provided in an embodiment of the present application;

[0089] Fig. 20 It is a structural diagram of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0090] In order to make the objectives, technical solutions and advantages of the present application clearer, the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0091] The terms "first" and "second" in the specification, claims and drawings of this application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices.

[0092] The "embodiment" mentioned in this article means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It can be explicitly and implicitly understood by those skilled in the art that in the various embodiments of the present application, if there is no special explanation and logical conflict, the terms and / or descriptions between the various embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships.

[0093] It should be understood that in the present application, "at least one (item)" means one or more, "more than one" means two or more, "at least two (items)" means two or three and more than three, and "and / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0094] The technical solution provided in the embodiment of the present application can be applied to WLAN systems, such as Wi-Fi, etc. The method provided in the embodiment of the present application can be applied to IEEE 802.11 series protocols, such as 802.11a / b / g protocol, 802.11n protocol, 802.11ac protocol, 802.11ax protocol, 802.11be or Wi-Fi 7 or EHT protocol or next-generation protocols, such as Wi-Fi8, UHR, Wi-Fi AI and other 802.11 series protocol wireless LAN systems, etc. The technical solution provided in the embodiment of the present application can also be applied to wireless personal area networks (WPAN) based on UWB technology, sensing systems, etc. The method provided in the embodiment of the present application can also be applied to IEEE802.15 series protocols, such as 802.15.4a protocol, 802.15.4z protocol or 802.15.4ab protocol, or a future generation of UWB WPAN protocol, etc., which are no longer listed one by one. The technical solution provided in the embodiments of the present application can also be applied to the following communication systems, for example, the Internet of Things (IoT) system, the Vehicle to X (V2X), the Narrow Band Internet of Things (NB-IoT) system, devices in the Vehicle to X, IoT nodes, sensors, etc. in the Internet of Things (IoT), smart cameras in smart homes, smart remote controls, smart water meters and electricity meters, as well as sensors in smart cities, etc., or can also be applicable to the Long Term Evolution (LTE) system, the fifth-generation (5G) communication system, and new communication systems that will emerge in the future development of communications.

[0095] WLAN systems can provide high-speed and low-latency transmission. With the continuous evolution of WLAN application scenarios, WLAN systems will be applied to more scenarios or industries, such as the Internet of Things industry, the Internet of Vehicles industry or the banking industry, corporate offices, sports stadiums and exhibition halls, concert halls, hotel rooms, dormitories, wards, classrooms, supermarkets, squares, streets, production workshops and warehouses, etc. Of course, devices supporting WLAN communication or perception (such as access points or sites) can be sensor nodes in smart cities (such as smart water meters, smart electric meters, and smart air detection nodes), smart devices in smart homes (such as smart cameras, projectors, display screens, televisions, speakers, refrigerators, washing machines, etc.), nodes in the Internet of Things, entertainment terminals (such as wearable devices such as augmented reality (AR) and virtual reality (VR)), smart devices in smart offices (such as printers, projectors, loudspeakers, speakers, etc.), Internet of Vehicles devices in the Internet of Vehicles, infrastructure in daily life scenarios (such as vending machines, self-service navigation desks in supermarkets, self-service cash registers, self-service ordering machines, etc.), and equipment in large sports and music venues, etc. For example, access points and sites can be devices used in the Internet of Vehicles, Internet of Things nodes and sensors in the Internet of Things, smart cameras, smart remote controls, smart water and electric meters in smart homes, and sensors in smart cities, etc.

[0096] Although the embodiments of the present application mainly take WLAN as an example, especially the network applied to the IEEE 802.11 series of standards, such as supporting Wi-Fi 7, which can also be called an extremely high throughput (extremely high-throughput, EHT) system, and supporting Wi-Fi 8, which can also be called an ultra-high reliability (ultra high reliability, UHR) or ultra-high reliability and throughput (ultra high reliability and throughput, UHRT) system. It is easy for those skilled in the art to understand that the various aspects involved in the embodiments of the present application can be extended to other networks that adopt various standards or protocols. For example, Bluetooth, high performance radio LAN (HIPERLAN) (a wireless standard similar to the IEEE802.11 standard) and wide area network (WAN) or other networks now known or developed later.

[0097] The method provided in the present application may be implemented by a communication device in a wireless communication system. For example, the communication device may be an access point (AP) or a station (STA). Figure 1 1 is a schematic diagram of the architecture of a communication system provided in an embodiment of the present application. The communication system includes at least one AP and at least one STA. Figure 1 Only one AP and two STAs (respectively STA1 and STA2) are shown as examples.

[0098] AP is a device with wireless communication function, supports communication or perception using WLAN protocol, has the function of communicating or perceiving with other devices (such as stations or other access points) in the WLAN network, and of course, can also have the function of communicating or perceiving with other devices. Alternatively, the access point is equivalent to a bridge connecting the wired network and the wireless network, and its main function is to connect various wireless network clients together, and then connect the wireless network to the Ethernet. In the WLAN system, the access point can be called an access point station (AP STA). The device with wireless communication function can be a complete device, or a chip or processing system installed in the complete device, etc. The device installed with these chips or processing systems can implement the methods and functions of the embodiments of the present application under the control of the chip or processing system. The AP in the embodiment of the present application is a device that provides services for STA, and can support the 802.11 series of protocols. For example, the access point can be an access point for a terminal (such as a mobile phone) to enter a wired (or wireless) network, which is mainly deployed in homes, buildings, and parks, with a typical coverage radius of tens of meters to hundreds of meters. Of course, it can also be deployed outdoors. For another example, the AP may be a communication entity such as a communication server, a router, a switch, a bridge, etc.; the AP may include various forms of macro base stations, micro base stations, relay stations, etc., and of course the AP may also be a chip and processing system in these various forms of devices, so as to implement the methods and functions of the embodiments of the present application. The access point in the present application may be a high efficiency (HE) AP or an extraordinarily high throughput (EHT) AP, or an access point applicable to future WiFi standards, etc.

[0099] STA is a device with wireless communication function, supports communication or perception using WLAN protocol, and has the ability to communicate or perceive with other stations or access points in the WLAN network. In the WLAN system, the station can be called a non-access point station (non-AP STA). For example, STA is any user communication device that allows the user to communicate or perceive with the AP and then communicate with the WLAN. The device with wireless communication function can be a complete device, or a chip or processing system installed in the complete device, etc. The device installed with these chips or processing systems can implement the methods and functions of the embodiments of the present application under the control of the chip or processing system. For example, the station can be a wireless communication chip, a wireless sensor or a wireless communication terminal, etc., which can also be called a user. For another example, the station can be a mobile phone supporting WiFi communication function, a tablet supporting WiFi communication function, a set-top box supporting WiFi communication function, a smart TV supporting WiFi communication function, a smart wearable device supporting WiFi communication function, a vehicle-mounted communication device supporting WiFi communication function, and a computer supporting WiFi communication function, etc.

[0100] For example, Figure 2 Schematic diagram of the structure of AP and STA provided in the embodiment of the present application. The AP can be multi-antenna or single-antenna. Figure 2 As shown in FIG. 1 , the AP includes a physical layer (PHY) processing circuit and a medium access control (MAC) processing circuit. The physical layer processing circuit can be used to process physical layer signals, and the MAC layer processing circuit can be used to process MAC layer signals. The 802.11 standard focuses on the PHY and MAC parts. Figure 2 As shown, Figure 2 A schematic diagram of the STA structure with a single antenna is also shown. In actual scenarios, the STA may also have multiple antennas and may be a device with more than two antennas. The STA may include a PHY processing circuit and a MAC processing circuit. The physical layer processing circuit may be used to process physical layer signals, and the MAC layer processing circuit may be used to process MAC layer signals.

[0101] In some possible implementations, the operating mode (OM) of the STA may include an energy-saving mode (or low-power mode) and a non-energy-saving mode (or high-power mode). When there is no data transmission, the STA is in the energy-saving mode for monitoring to save the energy consumption of the STA. The STA switches to the non-energy-saving mode before receiving data to better receive the data. Exemplarily, the STA can switch between the energy-saving mode and the non-energy-saving mode by switching between a high-capability receiver and a low-capability receiver or adjusting the OM parameters, thereby realizing the energy-saving solution of the STA.

[0102] For example, the AP can instruct the STA to perform OM switching by sending a request to send (RTS) frame or a trigger (Trigger) frame. After the STA receives the RTS frame or trigger frame carrying the OM parameters corresponding to the high power consumption mode, it can switch to the high power consumption mode or wake up the high-capability receiver. Figure 3 As shown, after the AP sends an RTS frame or a trigger frame, the STA replies to the AP with a clear to send (CTS) frame. The STA can switch to high power mode before sending the CTS frame, or it can switch to high power mode after sending the CTS frame. The STA receives the PPDU sent by the AP based on the high power mode, for example, the PPDU includes a pre-EHT field and an EHT modulation field. After receiving the PPDU, the STA can also reply to the AP with a BA frame.

[0103] However, in this manner, the air interface and time overhead introduced by the interaction between the AP and the STA, as well as the repeated parameters included in the RTS frame or the trigger frame and the PPDU frame, lead to a waste of resources.

[0104] In view of this, the embodiment of the present application provides a communication method that can avoid air interface and time overhead and save signaling overhead. Figure 1 In the communication system shown. The method provided in the embodiment of the present application can be applied to a first communication device and a second communication device, the first communication device can be an AP or a STA, and the second communication device can be an AP or a STA. For ease of explanation, the method provided in the embodiment of the present application is described below by taking the first communication device as an AP and the second communication device as a STA as an example.

[0105] Please see Figure 4 , Figure 4 A flow chart of a communication method provided in an embodiment of the present application. The method includes but is not limited to the following steps.

[0106] 401. The AP generates a PPDU, where the PPDU includes a first field, and a duration of the first field is determined by a duration of adjusting an OM parameter by a first STA.

[0107] Exemplarily, the first STA has energy-saving capability, that is, the working mode of the first STA may include an energy-saving mode and a non-energy-saving mode. For example, the first STA can switch between the energy-saving mode and the non-energy-saving mode by adjusting the OM parameters. The first field is used to provide the time for the first STA to adjust the OM parameters. The AP can determine the duration of the first field according to the duration of the first STA adjusting the OM parameters, so that the first STA can adjust the OM parameters within the duration of the first field. For example, the duration of the first field is greater than or equal to the duration of the first STA adjusting the OM parameters.

[0108] Exemplarily, the PPDU may also include OM parameters adjusted by the first STA.

[0109] In a possible implementation, the PPDU further includes a first signaling (SIG) field and a first data field, the first field is located between the first SIG field and the first data field, and the first data field is carried on the first RU.

[0110] Exemplarily, the first SIG field includes signaling indication information of the first field, for example, the first SIG includes location information and length information of the first field. The first SIG field may include at least one of a universal signaling field (U-SIG) and a UHR-SIG. The first data field is used to transmit data of the first STA, and the first data field is transmitted on the first RU. After the first STA adjusts the OM parameters within the duration of the first field, it can receive the data carried by the first data field based on the adjusted OM parameters.

[0111] In this implementation, the first field is set between the first SIG field and the first data field, so that the first STA can adjust the OM parameters within the duration of the first field and receive data based on the adjusted OM parameters on the first data field, thereby ensuring the reliability of the data received by the first STA.

[0112] In a possible implementation, the PPDU also includes first indication information, and the first indication information is used to indicate that the first STA adjusts the OM parameters. Exemplarily, the first indication information may be included in a common field or a user field of the first SIG field of the PPDU. For example, the PPDU may indicate whether the first STA adjusts the OM parameters through 1 bit in the user field corresponding to the first STA.

[0113] In a possible implementation, the PPDU further includes a second field, which is located after the first field, and the second field includes a short training sequence (STF). The short training sequence has a short periodicity, and the second field is used for the first STA to perform automatic gain control (AGC) after adjusting the OM parameters, so that the first STA can better receive data.

[0114] Exemplarily, the STF may be specified by a protocol or negotiated between the AP and the first STA, and the first STA may adjust the AGC based on the STF. For example, the STF may include a repeat UHR-STF (repeat UHR-STF, R-UHR-STF).

[0115] Exemplarily, the second field may be transmitted by the RU corresponding to at least one STA, and the at least one STA includes the first STA. The at least one STA is all or part of the multiple STAs that transmit data in the PPDU, that is, the PPDU transmits data of any STA in the at least one STA. That is, the bandwidth range corresponding to the second field includes the bandwidth range of the RU corresponding to at least one STA.

[0116] Exemplarily, the second field can be determined by the AP to determine the transmission bandwidth, and the transmission bandwidth includes the RU corresponding to the first STA. The second field can be transmitted over all or part of the transmission bandwidth of the PPDU. For example, at least one STA includes one STA, that is, the second field is transmitted by the RU corresponding to the first STA, which can avoid the impact of the second field on the data transmitted by other STAs and reduce the transmission resource overhead of other STAs. For another example, at least one STA includes all of the multiple STAs, that is, the second field is transmitted over the entire transmission bandwidth of the PPDU, so that the short periodicity of the short training sequence can be avoided from being affected by the data of other STAs, and the reliability of the first STA adjusting the AGC is ensured.

[0117] In a possible implementation, the PPDU further includes a third field, where the third field is located after the first field, and the third field is used by the first STA to perform channel estimation after adjusting the OM parameters.

[0118] Exemplarily, the third field may be transmitted by the RU corresponding to at least one STA, and the at least one STA includes the first STA. The at least one STA is at least one STA among the multiple STAs corresponding to the PPDU, that is, the PPDU transmits data of any STA among the at least one STA. That is, the bandwidth range corresponding to the third field includes the bandwidth range of the RU corresponding to at least one STA.

[0119] Exemplarily, the third field may carry a first sequence, which is specified by a protocol or negotiated between the AP and the first STA, and the first STA can perform channel estimation based on the first sequence. For example, the third field includes a long training field (LTF).

[0120] Exemplarily, the OM parameters include at least one of the following: modulation and coding scheme (MCS), number of spatial streams (NSS), bandwidth, transmit power, and receive frequency.

[0121] Exemplarily, when the first STA only needs to adjust the MCS, the PPDU may not include the second field and the third field. When the first STA needs to adjust the NSS and the bandwidth, the PPDU includes the second field and the third field.

[0122] In a possible implementation, the first SIG field in the PPDU includes at least one of the following: a starting position of the first field, a starting position of the third field, a starting position of the second field, a length of the first field, a length of the third field, and a length of the second field. In this implementation, the starting position of the first field, the starting position of the third field, the starting position of the second field, the length of the first field, the length of the third field, and the length of the second field can be flexibly configured through the SIG field.

[0123] Exemplarily, the starting position of the first field may indicate the offset of the starting time of the first field relative to the starting time of other fields in the PPDU or the number of symbols corresponding to the starting time of the first field. It is understandable that when the relative position of the first field in the PPDU is fixed, the first SIG field may not include the starting position of the first field. For example, if the protocol stipulates or the AP configures that the first field is located after the UHR-STF in the PPDU, the first SIG field may not include the starting position of the first field.

[0124] Exemplarily, the length of the first field may indicate the duration of the first field or the number of symbols or bits occupied, the length of the third field may indicate the duration of the third field or the number of symbols or bits occupied, or the number of LTFs in the third field, and the length of the second field may indicate the duration of the second field or the number of symbols or bits occupied, or the number of STFs in the second field. It is understandable that when the length of the first field, the third field, or the second field is specified by the protocol or negotiated between the AP and the STA, the PPDU may not include the length of the first field, the third field, or the second field.

[0125] Exemplarily, the starting position of the first field, the starting position of the third field, the starting position of the second field, the length of the first field, the length of the third field, and the length of the second field may be included in the common field of the first SIG field, or may be included in the user field of the first SIG field. For example, the starting position of the first field, the starting position of the third field, the starting position of the second field, the length of the first field, the length of the third field, and the length of the second field may be included in the user field corresponding to the first STA.

[0126] As an example, the PPDU includes the starting position of the first field, the length of the first field, the length of the third field, and the length of the second field. In this example, the second field is located after the first field, and the third field is located after the second field. The starting position of the second field can be determined by the starting position of the first field and the length of the first field. The starting position of the third field can be determined by the starting position of the second field and the length of the second field. It is understandable that when the length of the third field and the second field is specified by the protocol or negotiated between the AP and the STA or determined by the length of the UHR-LTF and UHR-STF in the PPDU, the PPDU may not include the length of the third field and the second field. That is, in this case, the PPUD includes the starting position of the first field and the length of the first field.

[0127] As another example, the first SIG field of the PPDU may include a mode of the second field, and different modes of the second field may correspond to different starting positions and / or lengths of the second field, and the length of the first field is determined by the duration of the first STA adjusting the OM parameter and the starting position of the second field. In this implementation, the PPDU only needs to indicate the mode of the second field in the first SIG to determine the length of the first field.

[0128] As another example, the second field is transmitted on the RU corresponding to multiple STAs, the common field of the first SIG field includes the starting position and length of the second field, the user field corresponding to the first STA includes the length of the first field and the length of the third field, and the first STA can determine the starting position of the first field based on the starting position of the second field and the length of the first field.

[0129] 402, the AP sends a PPDU, and correspondingly, the first STA receives the PPDU, wherein the first field is carried in the first RU, and the first RU is included in the RU corresponding to the first STA.

[0130] The RU corresponding to the first STA is the RU allocated by the AP to the first STA for transmitting the data of the first STA. The first RU is all or part of the RU corresponding to the first STA. For example, the first STA may correspond to multiple RUs, and the first RU is one of the multiple RUs. That is, the RU that transmits the first field is all or part of the RU corresponding to the first STA.

[0131] Exemplarily, before the first STA completes the OM parameter adjustment, it uses the OM parameters before the adjustment to receive the PPDU. After the first STA completes the OM parameter adjustment, it uses the OM parameters after the adjustment to receive the PPDU. For example, before the first STA completes the OM parameter adjustment, it uses a low-capability receiver or a low-power consumption mode to receive the PPDU. After the first STA completes the OM parameter adjustment, it uses a high-capability receiver or a high-power consumption mode to receive the remaining PPDU.

[0132] 403. The first STA adjusts OM parameters based on the PPDU.

[0133] Exemplarily, after receiving the PPDU, the first STA adjusts the OM parameters based on the PPDU. For example, the first STA adjusts the OM parameters based on the PPDU when any of the following items is met: the first SIG field of the PPDU contains the user field corresponding to the first STA, the OM parameters indicated by the PPDU are different from the current OM parameters of the first STA, and the OM parameter adjustment indication information is received. That is, the first STA adjusts the OM parameters based on the PPDU when the first SIG field of the PPDU contains the user field corresponding to the first STA or the OM parameters indicated by the PPDU are different from the current OM parameters of the first STA or the OM parameter adjustment indication information is received. The user field corresponding to the first STA includes an association identifier (association identifier, AID) that matches the first STA identifier (STA-identifier, STA-ID).

[0134] In a possible implementation, the start time of the first STA adjusting the OM parameters includes any of the following: the time when the first STA detects that the first signaling SIG field contains a user field corresponding to the first STA, the time when the first STA completes detecting the first signaling SIG field, and the start time of the first field. The first STA starts adjusting the OM parameters at the time when the first signaling SIG field contains a user field corresponding to the first STA, so that the adjustment of the OM parameters can be completed faster and the duration of the first field can be shortened.

[0135] In an embodiment of the present application, the PPDU can provide the first STA with a time for adjusting the OM parameters through the first field. The duration of the first field is determined by the duration of the first STA adjusting the OM parameters, so that when the first STA receives the PPDU, it can adjust the OM parameters within the duration of the first field, thereby eliminating the need to interact with the AP via RTS frames or trigger frames, reducing air interface and time overhead, and avoiding repeated transmission of parameters, saving signaling overhead, and avoiding waste of resources.

[0136] In one possible implementation, Figure 4 The illustrated method also includes step 404 .

[0137] 404. The first STA sends a BA frame. Accordingly, the AP receives the BA frame. The BA frame includes second indication information. The second indication information is used to indicate the duration of the first STA to adjust the OM parameters.

[0138] As an example, after receiving the above-mentioned PPDU, the first STA sends a BA frame to the AP, and the BA frame includes second indication information to instruct the first STA to adjust the duration of the OM parameters, so that the AP can flexibly adjust the length of the first field in the subsequent PPDU based on the second indication information.

[0139] As another example, the length of the first field in the PPDU is determined by the second indication information, and the first STA sends a BA frame to the AP after receiving the PPDU last time. The AP determines the length of the first field according to the second indication information in the BA frame.

[0140] Exemplarily, the length of the first field may be greater than or equal to the duration for the first STA to adjust the OM parameters.

[0141] In a possible implementation manner, the second indication information is used to indicate the duration of the last adjustment of the OM parameters by the first STA.

[0142] Exemplarily, the BA frame includes a last OM switch duration field, and the last OM switch duration field carries the second indication information.

[0143] Exemplarily, the second indication information may indicate that the first STA adjusts the difference between the duration of the OM and the duration of the first field in the previous PPDU.

[0144] Exemplarily, the second indication information can be used to determine the MCS. For example, when the difference between the duration of the first STA adjusting OM and the duration of the first field in the previous PPDU is greater than the third threshold, the AP can determine that the packet error rate problem fed back in the BA is caused by the insufficient length of the first field. That is, the first STA fails to complete the adjustment of the OM parameters within the duration of the first field or the first STA fails to complete the adjustment of the OM parameters before the start time of the first data field, resulting in a high packet error rate. In this case, the packet error rate is large, especially when errors occur in the data that is preferentially transmitted in the first data field. The AP can increase the length of the first field to solve the packet error rate problem without lowering the MCS. The third threshold can be determined by the duration of the first field and the duration of the first STA adjusting OM. For example, the third threshold is 20% of the duration of the first field or the duration of the first STA adjusting OM.

[0145] In another possible implementation manner, the second indication information may indicate a maximum duration for the first STA to adjust the OM parameters.

[0146] Exemplarily, the duration of the maximum adjustment of the OM parameter of the first STA may be determined by the capability of the first STA or the duration of the historical adjustment of the OM parameter. For example, the duration of the maximum adjustment of the OM parameter of the first STA includes the maximum adjustment of the OM parameter of the first STA within a period of time.

[0147] Exemplarily, the BA frame may include a maximum OM switching duration field, which carries the second indication information. The BA frame may also include a maximum OM switching duration presence field, which is used to indicate whether the maximum OM parameter switching duration field exists. For example, when the maximum OM switching duration presence field is set to 1, the maximum OM switching duration presence field indicates that the maximum OM switching duration field exists in the BA frame; when the maximum OM switching duration presence field is set to 0, the maximum OM switching duration presence field indicates that the maximum OM switching duration field does not exist in the BA frame.

[0148] It is understandable that the above BA frame may be a BA frame defined by the protocol, and the first STA or AP adds a last OM switching duration field or a maximum OM switching duration field to the existing BA frame. Alternatively, the above BA frame is a newly defined BA frame for carrying the second indication information.

[0149] In one possible implementation, Figure 4The method shown can be applied to a multi-user scenario. In a multi-user scenario, the PPDU is used to transmit data of multiple STAs, and the first STA is a STA among the multiple STAs that needs to adjust OM parameters. For example, the PPDU includes an MU PPDU. The first field is used to provide the first STA with a time to adjust the OM parameters, so that the first STA can adjust the OM parameters within the duration of the first field. For example, the first STA is in a low power mode or a power saving mode, that is, the first STA uses a low-capability receiver or a low power mode to receive the PPDU before adjusting the OM parameters.

[0150] In another possible implementation, Figure 4 The method shown can be applied to a single-user scenario. In a single-user scenario, the PPDU is used to transmit data of the first STA, and the first RU is the RU whose OM parameters need to be adjusted among multiple RUs corresponding to the first STA. For example, the PPDU includes a SU PPDU. In this implementation, when the first STA receives the PPDU, different OM parameters can be used on different RUs, so the first STA can adjust the OM parameters for a single RU. The first field is used to provide the time for the first STA to adjust the OM parameters corresponding to the first RU. The duration of the first field can be determined according to the duration of the first STA adjusting the OM parameters corresponding to the first RU.

[0151] Exemplarily, in a single-user scenario, the second field or the third field may be transmitted by at least one RU, where the at least one RU is all or part of a plurality of RUs corresponding to the first STA, and the at least one RU includes the first RU.

[0152] It is understandable that in the embodiment of the present application, the first STA adjusting the OM parameter can be replaced by the description that the first STA switches the OM, for example, the first STA switches from the energy-saving mode to the non-energy-saving mode. The first field can also be called a padding field.

[0153] For example, regarding the above PPDU, the embodiments of the present application also provide the following examples:

[0154] Example 1: PPDU includes a first field, a second field, and a third field. The first field and the third field are transmitted by the RU corresponding to the first STA, and the second field is transmitted by the RU corresponding to multiple STAs. The second field is located after the first field, and the third field is located after the second field.

[0155] Exemplarily, the multiple STAs are STAs that transmit data in a PPDU, that is, the bandwidth range corresponding to the second field is the bandwidth range corresponding to the PPDU. Exemplarily, the third field may include a UHR-LTF corresponding to the first STA.

[0156] Exemplarily, the PPDU also includes a first SIG field, and the first SIG field includes at least one of the following: the starting position of the first field, the starting position of the third field, the starting position of the second field, the length of the first field, the length of the third field, and the length of the second field. The above information may be included in the common field or user field of the first SIG field. For example, the user field corresponding to the first STA may include the starting position of the first field, the length of the first field, the length of the second field, and the length of the third field. The user field corresponding to other STAs other than the first STA may include the starting position of the second field and the length of the second field.

[0157] like Figure 5A As shown, Figure 5A Taking 8 STAs as an example, namely STA1-STA8, the first field and the third field are transmitted by the RU corresponding to STA8 (i.e., the first STA), and the second field is transmitted by the RU corresponding to STA1-STA8. The PPDU also includes at least one of the following: L-STF, L-LTF, legacy signaling field (legacy-signal field, L-SIG), repeated legacy signaling field (repeated legacy-signal field, RL-SIG), U-SIG, UHR-SIG, UHR-STF, multiple UHR-LTFs, multiple data fields, package extension (package, extension, PE). The first field is located after the UHR-STF. L-STF, L-LTF, L-SIG, RL-SIG, U-SIG, UHR-SIG, and UHR-STF are transmitted on the RUs corresponding to multiple STAs. Multiple data fields are used to transmit data of multiple STAs, and any data field in the multiple data fields is transmitted by the RU corresponding to the corresponding STA. Such as Figure 5A In the data field, the data 1 field to the data 8 field are used to transmit the data of STA1-STA8 respectively. For example, the data 1 field is used to transmit the data of STA1, and the data 1 field is transmitted on the RU corresponding to STA1. Multiple UHR-LTFs correspond to STAs that do not adjust OM parameters among multiple STAs (such as STAs in non-energy-saving mode). The number of UHR-LTFs is the same as the number of STAs that do not adjust OM parameters among multiple STAs. Any UHR-LTF among the multiple UHR-LTFs is transmitted by the RU corresponding to the corresponding STA that does not adjust OM parameters. For example, Figure 5A STA1-STA7 do not adjust the OM parameters, and the PPDU includes seven UHR-LTFs (UHR-LTF1-UHR-LTF7). UHR-LTF1 is transmitted by the RU corresponding to STA1, UHR-LTF2 is transmitted by the RU corresponding to STA2, ...., UHR-LTF7 is transmitted by the RU corresponding to STA7.

[0158] In this example, the second field is transmitted by RUs corresponding to multiple STAs. For STAs that do not need to adjust OM parameters, the second field can be used as an intermediate preamble (Midamble) to enhance its mobility and channel estimation capabilities, so that data can be better received. For the STA that needs to adjust OM parameters (i.e., the first STA), the influence of other STA's data on the second field can be avoided, so that the first STA can better adjust the AGC after adjusting the OM parameters.

[0159] In the embodiment of the present application, the starting position of the first field can be flexibly indicated by the first SIG field, for example, Figure 5A In the case of a HR-STF, the first field is located after the UHR-STF, or as Figure 5B As shown, the first field may also be located after the UHR-SIG.

[0160] Example 2: The PPDU includes a first field, a second field, and a third field. The first field, the second field, and the third field are transmitted by the RU corresponding to the first STA, the second field is located after the first field, and the third field is located after the second field. Exemplarily, the third field may include the UHR-LTF corresponding to the first STA.

[0161] like Figure 6 As shown, the PPDU transmits data of STA1-STA8, and the first field, the second field and the third field are transmitted by the RU corresponding to STA8 (i.e., the first STA). The PPDU also includes at least one of the following: L-STF, L-LTF, L-SIG, RL-SIG, U-SIG, UHR-SIG, UHR-STF, multiple UHR-LTFs, multiple data fields, and PE.

[0162] Exemplarily, the third field may include the UHR-LTF corresponding to the first STA.

[0163] In this example, the first field, the third field, and the second field are transmitted by the RU corresponding to the first STA, which may not affect the data transmission of other STAs and avoid the transmission resource overhead of the first field, the third field, and the second field to other STAs.

[0164] In this example, the starting position of the first field, the starting position of the third field, the starting position of the second field, the length of the first field, the length of the third field, the length of the second field, etc. can be included in the user field corresponding to the first STA in the first SIG field.

[0165] Example 3: The PPDU includes a first field and a third field. The first field and the third field are transmitted by the RU of the first STA. The third field is located after the first field. Exemplarily, the third field may include the UHR-LTF corresponding to the first STA.

[0166] like Figure 7 As shown, the PPDU transmits data of STA1-STA8, and the first field and the third field are transmitted by the RU corresponding to STA8 (i.e., the first STA). The PPDU also includes at least one of the following: L-STF, L-LTF, L-SIG, RL-SIG, U-SIG, UHR-SIG, UHR-STF, multiple UHR-LTFs, multiple data fields, and PE.

[0167] In this example, the first field and the third field are transmitted by the RU of the first STA, which can reduce resource overhead.

[0168] In this example, the starting position of the first field, the starting position of the third field, the length of the first field, the length of the third field, etc. may be included in the user field corresponding to the first STA in the first SIG field.

[0169] Example 4: The PPDU includes a first field and a third field. The first field is transmitted by the RU corresponding to the first STA, and the third field is transmitted by the RU corresponding to multiple STAs. The third field is located after the first field. Exemplarily, the third field may include the UHR-LTF corresponding to the first STA.

[0170] like Figure 8 As shown, the PPDU transmits data of STA1-STA8, the first field is transmitted by the RU corresponding to STA8 (i.e., the first STA), and the third field is transmitted by the RU corresponding to STA1-STA8. The PPDU also includes at least one of the following: L-STF, L-LTF, L-SIG, RL-SIG, U-SIG, UHR-SIG, UHR-STF, multiple UHR-LTFs, multiple data fields, and PE.

[0171] Exemplarily, the common field or user field of the first SIG field of the PPDU may include at least one of the starting position of the first field, the length of the first field, the starting position of the third field, and the length of the third field. For example, the user field corresponding to the first STA may include the starting position of the first field, the length of the first field, and the length of the third field. The user field corresponding to other STAs other than the first STA may include the starting position of the third field and the length of the third field.

[0172] In this example, the third field is transmitted by RUs corresponding to multiple STAs, so that the multiple STAs can perform channel estimation based on the third field, thereby enhancing the channel estimation capability of the multiple STAs.

[0173] Example 5: The PPDU includes a first field, a second field, and a third field. The first field is transmitted by the RU of the first STA, and the third field and the second field are transmitted by the RUs corresponding to multiple STAs. The second field is located after the first field, and the third field is located after the second field. Exemplarily, the third field may include the UHR-LTF corresponding to the first STA.

[0174] like Fig. 9 As shown, the PPDU transmits data of STA1-STA8, the first field is transmitted by the RU corresponding to STA8 (i.e., the first STA), and the second field and the third field are transmitted by the RU corresponding to STA1-STA8. The PPDU also includes at least one of the following: L-STF, L-LTF, L-SIG, RL-SIG, U-SIG, UHR-SIG, UHR-STF, multiple UHR-LTFs, multiple data fields, and PE.

[0175] In this implementation, the third field and the second field are transmitted by RUs corresponding to multiple STAs, so that the multiple STAs can adjust AGC and perform channel estimation based on the second field and the third field, thereby enabling the multiple STAs to better receive data.

[0176] Example 6: The PPDU includes a first field, a third field, and a second field. The first field is transmitted by the RU corresponding to the first STA and the second STA. The duration of the first field is determined by the duration of adjusting the OM parameters of the first STA and the second STA.

[0177] Exemplarily, the first field is used to provide the time for the first STA and the second STA to adjust the OM parameters, that is, the first STA and the second STA can adjust the OM parameters within the duration of the first field. The duration of the first field is determined by the duration of the first STA and the second STA adjusting the OM parameters. For example, the duration of the first STA adjusting the OM parameters and the duration of the second STA adjusting the OM parameters are both less than or equal to the duration of the first field.

[0178] Exemplarily, the third field may be transmitted by RUs corresponding to multiple STAs, or the third field may be transmitted by RUs corresponding to the first STA and the second STA. The second field may be transmitted by RUs corresponding to multiple STAs, or the second field may be transmitted by RUs corresponding to the first STA and the second STA. Exemplarily, the third field may include UHR-LTFs corresponding to the first STA and the second STA.

[0179] For example, if Fig.10 As shown, the multiple STAs include STA1-STA8, that is, the PPDU transmits the data of STA1-STA8, the first field and the third field can be transmitted by the RU corresponding to STA8 (ie, the first STA) and STA6 (ie, the second STA), and the second field is transmitted by the RU corresponding to STA1-STA8. Fig.10 As shown, the PPDU also includes at least one of the following: L-STF, L-LTF, L-SIG, RL-SIG, U-SIG, UHR-SIG, UHR-STF, multiple UHR-LTFs, multiple data fields, and PE.

[0180] Exemplarily, when the RU corresponding to the first STA and the second STA is transmitted, and the second field is transmitted by the RU corresponding to multiple STAs, the common field of the first SIG field may include the starting position of the second field and the length of the second field, and the user field of the first STA and the second STA includes the length of the first field and the length of the third field. The first STA and the second STA can determine the starting position of the first field according to the starting position of the second field and the length of the first field.

[0181] It is understandable that the first field can also be transmitted by the RU corresponding to other STAs to provide OM parameter adjustment time for other STAs. Here, the first STA and the second STA are taken as examples.

[0182] In this example, the first field can be used to provide time for the first STA and the second STA to adjust the OM parameters. The duration of the first field is determined by the duration of the first STA and the second STA adjusting the OM parameters, so that the first STA and the second STA can complete the OM parameters in the first field, ensuring that the first STA and the second STA can better receive data.

[0183] It is understandable that in a single-user scenario, the duration of the first field is determined by the duration of the first STA adjusting the OM parameters of the first RU and the second RU, that is, the duration of the first field can be configured according to the longest OM parameter adjustment time of the first RU and the second RU.

[0184] Example 7: The PPDU includes a first field and a third field, the first field is transmitted by the RU corresponding to the first STA and the second STA, and the duration of the first field is determined by the duration of adjusting the OM parameters of the first STA and the second STA.

[0185] Exemplarily, the third field may include UHR-LTFs corresponding to the first STA and the second STA.

[0186] As an example, Fig.11AAs shown, PPDU transmits data of STA1-STA8, the first field is transmitted by RU corresponding to STA6 (ie, the second STA) and STA8 (ie, the first STA), and the third field can be transmitted by RU corresponding to multiple STAs (ie, STA1-STA8).

[0187] As another example, Fig. 11B As shown, the third field can be transmitted by the RU corresponding to STA6 (ie, the second STA) and STA8 (ie, the first STA).

[0188] In this example, the PPDU includes a first field and a third field. The first field provides the time for the first STA and the second STA to adjust the OM parameters, and the first STA and the second STA can perform channel estimation based on the third field, thereby ensuring the reliability of data transmission between the first STA and the second STA and reducing resource overhead.

[0189] Example 8: PPDU includes a first field and a fourth field, wherein the first field is transmitted by the RU corresponding to the first STA and the second STA, the duration of the fourth field is determined by the duration of the first field and the duration of the second STA adjusting the OM parameter, the fourth field is located after the first field, and the fourth field is transmitted by the RU corresponding to the second STA.

[0190] Exemplarily, when the difference between the durations of adjusting the OM parameters of the second STA and the first STA is greater than the second threshold, the PPDU may provide the first STA with the time to adjust the OM parameters through the first field, and provide the second STA with the time to adjust the OM parameters through the first field and the fourth field. The first STA adjusts the OM parameters within the duration of the first field, and the second STA adjusts the OM parameters within the duration of the first field and the fourth field. Therefore, the AP can adjust the duration of the first field and the fourth field according to the duration of adjusting the OM parameters of the first STA and the second STA. For example, the duration of the fourth field may be determined by the duration of the first field and the duration of adjusting the OM parameters of the second STA. For example, the duration of the fourth field may be greater than or equal to the first difference, which is the difference between the duration of adjusting the OM parameters of the second STA and the duration of the first field.

[0191] In a possible implementation, the PPDU also includes a third field and / or a second field. The third field is used for channel estimation after the first STA adjusts the OM parameters, and the second field is used for adjusting the AGC after the first STA adjusts the OM parameters. The third field can be transmitted by the RU corresponding to multiple STAs, or the third field can be transmitted by the RU corresponding to the first STA. The second field can be transmitted by the RU corresponding to multiple STAs, or the second field can be transmitted by the RU corresponding to the first STA. For example, the third field is transmitted by the RU corresponding to the first STA, and the second field is transmitted by the RU corresponding to multiple STAs.

[0192] Exemplarily, the third field may include the UHR-LTF corresponding to the first STA.

[0193] In another possible implementation, the PPDU further includes a fifth field and / or a sixth field. The fifth field or the sixth field is after the fourth field, the fifth field is used for the second STA to adjust the AGC after adjusting the OM parameters, and the sixth field is used for the second STA to perform channel estimation after adjusting the OM parameters.

[0194] Exemplarily, the fifth field is transmitted by the RU corresponding to the second STA, or the fifth field is transmitted by the RU corresponding to multiple STAs. The sixth field is transmitted by the RU corresponding to the second STA, or the sixth field is transmitted by the RU corresponding to multiple STAs. Exemplarily, the fifth field may include R-UHR-STF, and the sixth field may include UHR-LTF.

[0195] Fig.12 An example of a PPDU provided in an embodiment of the present application is as follows: Fig.12 As shown, the PPDU includes a first field, a third field, a second field, a fourth field, a fifth field and a sixth field. The PPDU transmits data of STA1-STA8, the first field is transmitted by the RU corresponding to STA8 (i.e., the first STA) and STA6 (i.e., the second STA), the third field is transmitted by the RU corresponding to STA8, the second field is transmitted by the RU corresponding to multiple STAs (i.e., STA1-STA8), the fourth field is transmitted by the RU corresponding to STA6, the fifth field is transmitted by the RU corresponding to STA1-STA8, and the sixth field is transmitted by the RU corresponding to STA6. The PPDU may also include at least one of the following: L-STF, L-LTF, L-SIG, RL-SIG, U-SIG, UHR-SIG, UHR-STF, multiple UHR-LTFs, and multiple data fields.

[0196] Exemplarily, the first SIG field of the PPDU includes at least one of the following: the starting position of the first field, the starting position of the third field, the starting position of the second field, the starting position of the fourth field, the starting position of the fifth field, the starting position of the sixth field, the length of the first field, the length of the third field, the length of the second field, the length of the fourth field, the length of the fifth field, and the length of the sixth field.

[0197] Exemplarily, the PPDU may include multiple fields (such as the first field and the fourth field) for providing the time for the STA to adjust the OM parameters, and the user field of the first SIG field may include the first number of corresponding STAs, and the first number is the number of fields for providing the time for the STA to adjust the OM parameters. For example, the first field provides the time for adjusting the OM parameters for the first STA, and the first number of the first STA is 1. The first field and the fourth field provide the time for adjusting the OM parameters for the second STA, and the first number of the second STA is 2.

[0198] In this example, when both the first STA and the second STA need to adjust the OM parameters, and the durations of the first STA and the second STA adjusting the OM parameters differ greatly, the first field and the fourth field can be included in the PPDU, so that the first STA adjusts the OM parameters within the duration of the first field, and the second STA adjusts the OM parameters within the duration of the first field and the fourth field, thereby minimizing the impact of the duration of the second STA adjusting the OM parameters on the data transmission of the first STA.

[0199] Example nine: The PPDU includes a first field combination, and the first field combination includes at least one of the following: a first field, a third field, and a second field.

[0200] Exemplarily, the first SIG field of the PPDU includes at least one of the following: the length of the first field combination, the starting position of the first field combination, the mode of the first field combination, and the size of the first field combination. The mode of the first field combination is used to indicate the fields included in the first field combination (i.e., the components of the first field combination) and the combination method of each field. For example, the mode field of the first field combination indicates that the first field combination includes the first field and the third field, or the mode field of the first field combination indicates that the first field combination includes the first field, the third field, and the second field.

[0201] The length of the first field combination can be used to indicate the total number of symbols or duration occupied by the first field combination. The size of the first field combination is used to indicate the length of each field included in the first field combination. For example, in the case where the first field combination includes the first field and the third field, the size field of the first field combination is used to indicate the length of the first field and the length of the third field. The starting position of the first field combination is used to indicate the starting position of the first field in the first field combination. For example, the first field combination includes the first field and the third field, the first field is before the third field, and the starting position of the first field combination indicates the starting position of the first field.

[0202] It can be understood that when the size of the first field combination indicates the length of each field included in the first field combination, the total length of the first field combination can be determined by the length of each field included in the first field combination, and therefore the PPDU may not include the length field of the first field combination.

[0203] Exemplarily, the first SIG field may also include the starting position and length of the field (i.e., the first field, the second field, or the third field) included in the first field combination. If the relative positions between the first field, the second field, and the third field can be determined, the first SIG field may only include the starting position of one of the fields, and the first STA may determine the starting positions of other fields based on the starting position and the relative positions between the first field, the second field, and the third field. If the components of the first field combination and the lengths of the second field and the third field are known, the first SIG may not include the length of the first field. If the components of the first field combination and the lengths of the first field and the second field are known, the first SIG may not include the length of the third field. If the components of the first field combination and the lengths of the first field and the third field are known, the first SIG may not include the length of the second field.

[0204] In one possible implementation, the mode of the first field combination can be used to indicate the fields included in the first field combination and the length of each field. In this implementation, multiple first field combination modes can be predefined, and the length of each first field combination mode, the fields included, the length of each field, etc. can be specified by the protocol or determined by negotiation between the AP and the STA. The PPDU can indicate the mode of the first field combination through the mode field, and the first STA can determine the length of the fields and each field included in the first field combination based on the mode of the first field combination. For example, the mode of the first field combination may include a first mode and a second mode. The first field combination of the first mode and the second mode includes different fields or different lengths of each field. When the mode field is set to 0, the mode of the first field combination is the first mode. When the mode field is set to 1, the mode of the first field combination is the second mode.

[0205] It is understandable that in this case, the PPDU may not include the size of the first field combination. The total length of the first field combination may be determined by the lengths of the various fields included in the first field combination, so the PPDU may not include the length field of the first field combination.

[0206] In a possible implementation, the PPDU may include one or more field combinations, each field combination including at least one of a padding field, a first STF, and a first LTF. The padding field is used to provide the time for the STA to adjust the OM parameters (such as the first field or the fourth field), the first STF is used to adjust the AGC after the STA adjusts the parameters (such as the second field or the fifth field), and the first LTF is used to perform channel estimation after the STA adjusts the parameters (such as the third field or the sixth field). For example, one or more field combinations include a first field combination and a second field combination, the first field combination includes at least one of the first field, the second field, and the third field, and the second field combination includes at least one of the fourth field, the fifth field, and the sixth field.

[0207] For the combination of the fields in the first field combination, please refer to the relevant descriptions in Examples 1 to 5 above, which will not be described in detail here.

[0208] As an example, the first SIG field in the PPDU may include the number of one or more field combinations and the length of the field included in any one of the one or more field combinations.

[0209] For example, the above PPDU includes N field combinations, such as Fig.13As shown, the first SIG field in the PPDU may include at least one of the following: the total number of field combinations (which may occupy 3 bits) and the length field of N field combinations (the length of field combination 0-the length of field combination N-1). The length field of each field combination of the length field of the N field combinations (which may occupy 8 bits) includes the length field of the padding field (which may occupy 2 bits), the number field of the first STF (which may occupy 3 bits), and the number field of the first LTF (which may occupy 3 bits). The length field of the padding field is used to indicate the length or duration of the padding field or the number of symbols occupied. Exemplarily, the length field of the padding field can indicate the length of the padding field in stages, that is, different values ​​of the length field of the padding field are used to indicate different lengths of the padding field. For example, when the value of the length field of the padding field is 1, it indicates that the length of the padding field is the first length; when the value of the length field of the padding field is 2, it indicates that the length of the padding field is the second length. The number field of the first STF is used to indicate the number of the first STF or the duration of the first STF or the length of the first STF, wherein the number of the first STF may be the number of symbols occupied by the first STF or the number of sequences contained. In the case where the first STF includes an R-UHR-STF, the number of first STFs may be the number of repetitions of the UHR-STF. The number of first LTFs field is used to indicate the number of first LTFs or the duration of the first LTF or the length of the first LTF, wherein the number of first LTFs may be the number of symbols occupied by the first LTF or the number of sequences included. In the case where the first LTF includes an R-UHR-LTF, the number of first LTFs may be the number of repetitions of the UHR-LTF.

[0210] Exemplarily, the starting position of the first STF in the nth field combination of the above-mentioned N field combinations can be determined by the length field of the padding field in the nth field combination and the number field of the first STF. If the number of the first LTF and the first STF is known, for example, the number of the first LTF and the first STF is the same as the number of UHR-LTF and UHR-STF in the PPDU, then the length field of the nth field combination may not include the number of the first LTF and the number of the first STF, that is, the length field of the nth field combination only needs to include the length of the padding field.

[0211] It is understandable that the number of bits occupied by the above-mentioned fields is only an example and should not be understood as a limitation of the present application. In the embodiment of the present application, the number of bits occupied by each field can be flexibly configured according to demand. The embodiment of the present application does not limit the order of the various fields in the above-mentioned first SIG field (such as the length field of the padding field, the number field of the first STF, the number field of the first LTF, etc.).

[0212] As another example, the lengths of the various fields in different field combinations are the same, for example, the lengths of the various fields in the one or more field combinations are specified by the protocol or negotiated between the AP and the STA. For example, the lengths of the padding field, the first STF, and the first LTF of any two field combinations in the one or more field combinations are the same. For example, one or more field combinations include a first field combination and a second field combination, the length of the padding field in the first field combination is the same as the length of the padding field in the second field combination, the length of the first LTF in the first field combination is the same as the length of the first LTF in the second field combination, and the length of the first STF in the first field combination is the same as the length of the STF in the second field combination. In this implementation, the first SIG field includes a field combination quantity field or a padding field quantity field, which is used to indicate the number of field combinations or the number of padding fields, and the first STA can determine the total length of one or more field combinations based on the number of field combinations or the number of padding fields. Alternatively, the first SIG field can include the total length of one or more field combinations, and the first STA can determine the number of one or more field combinations based on the total length of one or more field combinations.

[0213] Exemplarily, the first SIG field may also include any of the following: a length field of a padding field, a number field of a first STF, and a number field of a first LTF. The length field of the padding field is used to indicate the length or duration of the padding field in one or more field combinations or the number of symbols occupied, the number field of the first STF is used to indicate the number or length of the first STF in one or more field combinations or the number of symbols occupied, and the number field of the first LTF is used to indicate the number or length of the first LTF in one or more field combinations or the number of symbols occupied. It can be understood that if the length of the padding field is specified by the protocol or negotiated between the AP and the STA, the first SIG field may not include the length field of the padding field. If the number of the first STF is specified by the protocol or negotiated between the AP and the STA, the first SIG field may not include the number field of the first STF. If the number of the first LTF is specified by the protocol or negotiated between the AP and the STA, the first SIG field may not include the number field of the first LTF.

[0214] In a possible implementation, when the PPDU includes multiple field combinations, the user field of the first SIG field includes a field combination quantity field, which is used to indicate the number of field combinations corresponding to the STA corresponding to the user field. The STA adjusts the OM parameter within the duration of the padding field of the field combination corresponding to it.

[0215] In another possible implementation, the first SIG field includes a plurality of mode fields of field combinations, which are respectively used to indicate the modes of the plurality of field combinations, and the mode of the field combination is used to indicate the fields included in the corresponding field combination. Exemplarily, the mode of the field combination is also used to indicate the length of each field of the corresponding field combination, and the first SIG field may also include the total length of the field combination.

[0216] Exemplarily, the pattern of the field combination is also used to indicate the length of the padding field of the corresponding field combination, and the first SIG field may also include the number of first STFs or the number of first LTFs to indicate the number of first STFs and the number of first LTFs.

[0217] It can be understood that the above-mentioned filling field is only the name of the field used to provide the time for the STA to adjust the OM parameters in this application, and this application does not limit the name of the field used to provide the time for the STA to adjust the OM parameters.

[0218] It can be understood that the above introduces several examples of PPDU in multi-user scenarios. In a single-user scenario, the RU corresponding to the first STA can be replaced by the first RU, and the RUs corresponding to multiple STAs can be replaced by multiple RUs corresponding to the first STA.

[0219] Exemplarily, regarding the first field, the embodiments of the present application also provide the following several implementation methods.

[0220] Implementation method 1: The first field is used to carry the first data of the first STA, and the OM parameters corresponding to the first data carried by the first field include the OM parameters of the first STA before adjustment.

[0221] Exemplarily, the OM parameter corresponding to the first data is the OM parameter used by the first STA when receiving the first data. During the duration of the first field, the first STA has not completed the adjustment of the OM parameter, because the first STA can use the OM parameter before the adjustment to receive the first data carried by the first field.

[0222] Exemplarily, the first field may also include a long training sequence for performing channel estimation before the first STA receives the first data. Fig.14 As shown, the first field includes UHR-LTF and a second data field, and the second data field is used to transmit the first data.

[0223] In a possible implementation, the PPDU also includes a first data field, the first data field is located after the first field, the first data field is used to carry the first data, and the OM parameters corresponding to the first data carried by the first data field include the OM parameters adjusted by the first STA. The first data field is transmitted by the RU corresponding to the first STA.

[0224] Exemplarily, the first data field is after the first field, and the first STA completes the OM parameter switching within the duration of the first data field, so the first STA can use the adjusted OM parameters to receive the first data carried by the first data field. In this implementation, after the first STA completes the OM parameter adjustment, it repeatedly transmits the first data carried by the first field, so that the first STA can combine the two received data for demodulation, improve the reliability of the data, and support a longer transmission distance.

[0225] In this implementation, the first field carries the data of the first STA, which can reasonably utilize resources and avoid waste of resources.

[0226] Implementation method 2: The first field is used to carry data of other STAs (such as the third STA) other than the first STA.

[0227] Exemplarily, the third STA is a STA that does not need to adjust the OM parameters among multiple STAs that transmit PPDU data. For example, the third STA may include a STA in a non-energy-saving mode. The first field carries data of the third STA, and the third STA receives data on the RU corresponding to the first STA within the duration of the first field.

[0228] Exemplarily, the length of the first field is an integer multiple of an orthogonal frequency-division multiplexing (OFDM) symbol.

[0229] Exemplarily, the bandwidth range of the RU corresponding to the first STA is greater than or equal to the bandwidth range of the RU corresponding to the third STA.

[0230] Exemplarily, the PPDU further includes a first SIG field, the first SIG field carries third indication information, and the third indication information is used to indicate that the first field carries data of a third STA. For example, the first SIG field includes a seventh field, and the third indication information is carried in the seventh field.

[0231] As an example, the seventh field is included in the user field corresponding to the third STA in the first SIG field. Exemplarily, the seventh field may include at least one bit, which indicates whether the data of the third STA is transmitted in the first field. For example, the seventh field includes 1 bit, and when the value of the 1 bit is 1, it indicates that the data of the third STA is transmitted in the first field. The third STA can determine the position of the first field based on information such as the starting position of the first field in the first SIG field or the length of the first field, and receive data on the first field.

[0232] As another example, the seventh field is included in the common field of the first SIG. Exemplarily, the seventh field may include at least one bit, which indicates whether the first field carries data of other STAs other than the first STA. For example, the seventh field includes 1 bit, and when the value of the 1 bit is 1, it indicates that the first field carries data of other STAs other than the first STA, and the other STA includes a third STA. The third STA can determine the position of the first field based on information such as the starting position of the first field in the first SIG field or the length of the first field, and receive data on the first field.

[0233] In a possible implementation, the difference between the midpoint frequencies of the RU corresponding to the third STA and the RU corresponding to the first STA is less than the first threshold. Exemplarily, the RU corresponding to the third STA is adjacent to the RU corresponding to the first STA, and the first threshold can be determined by the bandwidth range of the RUs corresponding to the first STA and the third STA. For example, the first threshold can be 5 MegaHertz (MHz). In this implementation, the third STA only needs to detect the user field adjacent to the user field corresponding to the third STA to determine whether the first field carries the data of the third STA, without detecting all user fields in the first SIG field, which can reduce the waste of resources of the third STA.

[0234] In one possible implementation, the first SIG field includes a first user field, the first user field carries the third indication information and the identification information of the third STA, and the RU corresponding to the first user field is included in the RU corresponding to the first STA. For example, the STA-ID of the first user field includes the identification of the third STA.

[0235] Exemplarily, the RU corresponding to the first STA may correspond to multiple user fields, so that the first field can carry data of multiple STAs, including the third STA. For example, within the duration of the first field, the RU corresponding to the first STA may be used to transmit data of the third STA. Fig.15A or Fig. 15B As shown, the RU corresponding to the first STA corresponds to the first user field and the second user field. The second user field includes the identification information of the first STA and the seventh field, and the value of the seventh field in the second user field is different from the value of the seventh field in the first user field. For example, the value of the seventh field in the second user field is 0, and the value of the seventh field in the first user field is 1, to indicate that the first field carries the data of the third STA. The second user field can be located before the first user field, or the second user field can also be located after the first user field.

[0236] It is understandable that the present application does not limit the order of the first user field and the second user field. Fig.15A As shown, the first user field is located after the second user field. Fig. 15B As shown, the first user field is located before the second user field.

[0237] In a possible implementation, within the duration of the first field, the RU corresponding to the first STA can be used to transmit data of multiple STAs.

[0238] Exemplarily, the user field corresponding to the RU corresponding to the first STA may include a user field corresponding to the first STA (second user field) and multiple user fields corresponding to the multiple STAs, and the value of the seventh field in the multiple user fields is different from the value of the seventh field in the second user field to indicate that within the duration of the first field, the RU corresponding to the first STA transmits data of multiple STAs.

[0239] For example, if Fig.16A or Fig. 16B As shown, within the duration of the first field, the RU corresponding to the first STA can be used to transmit data of the third STA, the fourth STA, and the fifth STA. The user field corresponding to the RU corresponding to the first STA includes a first user field, a second user field, a third user field, and a fourth user field. Among them, the second user field includes identification information of the first STA, and the value of the seventh field in the second user field is 0. The first user field, the third user field, and the fourth user field correspond to the third STA, the fourth STA, and the fifth STA, respectively, and include identification information of the corresponding STA. The value of the seventh field in the first user field, the third user field, and the fourth user field is 1, which is used to indicate that the data of the corresponding STA is transmitted by the RU corresponding to the first STA during the duration of the first field. As shown Fig.16A As shown in , the first user field, the third user field, and the fourth user field may be after the second user field. Fig. 16B As shown, the first user field, the third user field, and the fourth user field may be before the second user field.

[0240] Exemplarily, the bandwidth range of the RU corresponding to the first STA is greater than or equal to the bandwidth range of the RU corresponding to multiple STAs, and the multiple STAs are STAs whose data is transmitted in the first field. The number of subcarriers or subchannels occupied by the data of any STA among the multiple STAs is determined by the RU of the STA pair. For example, the number of subcarriers or subchannels occupied by the data of the third STA is equal to the number of subcarriers or subchannels included in the RU corresponding to the third STA. Alternatively, the number of subcarriers or subchannels occupied by the data of any STA among the multiple STAs is an integer multiple of the minimum number of subcarriers, and the minimum number of subcarriers is the minimum value of the number of subcarriers included in the RU corresponding to the multiple STAs.

[0241] In one possible implementation, the first field is transmitted by the RU corresponding to the first STA and the second STA, and the first field carries the data of the third STA, that is, within the duration of the first field, the RU corresponding to the first STA and the second STA transmits the data of the third STA.

[0242] like Fig.17A or Fig. 17B As shown, the user field corresponding to the RU corresponding to the first STA includes a first user field and a second user field. The user field corresponding to the RU corresponding to the second STA includes a first user field and a fifth user field, and the fifth user field includes identification information of the second STA and a seventh field, wherein the value of the seventh field in the fifth user field is the same as the value of the seventh field in the second user field, and the value of the seventh field in the fifth user field is the same as the value of the seventh field in the first user field. For example, the value of the seventh field in the fifth user field and the second user field is 0, and the value of the seventh field in the first user field is 1. As shown Fig.17A As shown, the first user field can be after the second user field or the fifth user field. Fig. 17B As shown, the first user field may precede the second user field or the fifth user field.

[0243] In this implementation, the first field can carry data of other STAs (such as the third STA), so that the first field can be fully utilized and waste of resources can be avoided.

[0244] Implementation method three: The first field includes at least one of the following: a random sequence, a traditional short training sequence field L-STF, a traditional long training sequence field L-LTF, an ultra-high reliability short training sequence field UHR-STF, and an ultra-high reliability long training sequence field UHR-LTF.

[0245] Exemplarily, when the first field carries UHR-LTF, the third field may be a repeat UHR-LTF (repeat UHR-LTF, R-UHR-LTF). When the first field carries UHR-STF, the UHR-STF in the first field may be R-UHR-STF.

[0246] In this implementation, the first field can carry a long training sequence or a short training sequence, so that when the first STA completes the adjustment of the OM parameters before the termination time of the first field, it can adjust the AGC or perform channel estimation based on the long training sequence or the short training sequence.

[0247] It can be understood that the several implementation methods of the first field shown above can be applicable to the PPDU shown in any one of Examples 1 to 9.

[0248] The device provided in the embodiments of the present application is introduced below.

[0249] The present application divides the functional modules of the communication device according to the above method embodiment. For example, each functional module can be divided according to each function, or two or more functions can be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or software functional modules. It should be noted that the division of modules in the present application is schematic and is only a logical function division. There may be other division methods in actual implementation. Figures 18 to 20 The communication device according to the embodiment of the present application is described in detail.

[0250] Fig.18 is a schematic diagram of the structure of a communication device provided in an embodiment of the present application, such as Fig.18 As shown, the communication device includes a processing unit 1801 and a transceiver unit 1802. The transceiver unit 1802 can implement corresponding communication functions, and the processing unit 1801 is used for data processing. For example, the transceiver unit 1802 can also be called a communication interface or a communication unit.

[0251] In some embodiments of the present application, the communication device can be used to execute the actions performed by the AP in the above method embodiments. In this case, the communication device can be an AP or a component that can be configured on the AP (such as a chip or a system, etc.), and the transceiver unit 1802 is used to execute the AP's transceiver related operations in the above method embodiments, and the processing unit 1801 is used to execute the AP processing related operations in the above method embodiments.

[0252] Exemplarily, the processing unit 1801 is used to generate a PPDU; the transceiver unit 1802 is used to send the PPDU.

[0253] Optionally, the transceiver unit 1802 is also used to receive a BA frame.

[0254] It can be understood that the specific description of PPDU and BA frame, etc. can be referred to the method embodiment shown above, and will not be described in detail here.

[0255] In other embodiments of the present application, the communication device can be used to execute the actions performed by the first STA in the above method embodiment. In this case, the communication device can be the first STA or a component that can be configured in the first STA, such as a chip or a system, etc.), the transceiver unit 1802 is used to execute the transceiver-related operations of the first STA in the above method embodiment, and the processing unit 1801 is used to execute the first STA processing-related operations in the above method embodiment.

[0256] Exemplarily, the transceiver unit 1802 is used to receive the PPDU; the processing unit 1801 is used to adjust the OM parameters based on the PPDU.

[0257] Optionally, the transceiver unit 1802 is also used to send a BA frame.

[0258] It can be understood that the specific description of PPDU, OM parameters, BA frames, etc. can be referred to the method embodiment shown above, and will not be described in detail here.

[0259] Optionally, the above-mentioned communication device may further include a storage unit, which may be used to store instructions and / or data, and the processing unit 1801 may read the instructions and / or data in the storage unit so that the communication device implements the above-mentioned method embodiment.

[0260] It can be understood that the specific description of the transceiver unit and the processing unit shown in the embodiment of the present application is only an example. For the specific functions or execution steps of the transceiver unit and the processing unit, reference can be made to the above-mentioned method embodiment, which will not be described in detail here.

[0261] The above describes the communication device of the embodiment of the present application, and the following describes possible product forms of the communication device. Fig.18 Any form of product with the functions of the communication device described above falls within the protection scope of the embodiments of the present application. It should also be understood that the following description is only an example and does not limit the product form of the communication device of the embodiments of the present application to this.

[0262] In one possible implementation, Fig.18In the communication device shown, the processing unit 1801 may be one or more processors, the transceiver unit 1802 may be a transceiver, or the transceiver unit 1802 may also be a sending unit and a receiving unit, the sending unit may be a transmitter, the receiving unit may be a receiver, and the sending unit and the receiving unit are integrated into one device, such as a transceiver. In the embodiment of the present application, the processor and the transceiver may be coupled, etc., and the embodiment of the present application does not limit the connection mode of the processor and the transceiver. In the process of executing the above method, the process of sending information in the above method can be understood as the process of outputting the above information by the processor. When outputting the above information, the processor outputs the above information to the transceiver so that it is transmitted by the transceiver. After the above information is output by the processor, it may also need to be processed in other ways before it reaches the transceiver. Similarly, the process of receiving information in the above method can be understood as the process of the processor receiving the input information. When the processor receives the input information, the transceiver receives the above information and inputs it into the processor. Furthermore, after the transceiver receives the above information, the above information may need to be processed in other ways before it is received by the processor.

[0263] like Fig.19 As shown, the communication device 190 includes one or more processors 1920 and a transceiver 1910 .

[0264] In some embodiments of the present application, the communication device may be used to execute the steps or functions performed by the AP in the above method embodiments.

[0265] Exemplarily, the processor 1920 is used to generate a PPDU; and the transceiver 1910 is used to send the PPDU.

[0266] Optionally, transceiver 1910 is also used to receive BA frames.

[0267] In some other embodiments of the present application, the communication device can be used to execute the steps or functions performed by the first STA in the above method embodiment.

[0268] Exemplarily, the transceiver 1910 is configured to receive a PPDU; and the processor 1920 is configured to adjust an OM parameter based on the PPDU.

[0269] Optionally, transceiver 1910 is also used to send BA frames.

[0270] It can be understood that the specific description of the transceiver and the processor shown in the embodiments of the present application is only an example. For the specific functions or execution steps of the transceiver and the processor, reference can be made to the above-mentioned method embodiments, which will not be described in detail here.

[0271] In the above embodiments, the description of PPDU, BA frame, OM parameters, etc. can also refer to the introduction in the above method embodiments, which will not be described in detail here.

[0272] exist Fig.19 In various implementations of the communication device shown, the transceiver may include a receiver and a transmitter, wherein the receiver is used to perform a receiving function (or operation) and the transmitter is used to perform a transmitting function (or operation). The transceiver is used to communicate with other devices / devices through a transmission medium.

[0273] Optionally, the communication device 190 may also include one or more memories 1930 for storing program instructions and / or data, etc. The memory 1930 is coupled to the processor 1920. The coupling in the embodiment of the present application is an indirect coupling or communication connection between devices, units or modules, which may be electrical, mechanical or other forms, and is used for information exchange between devices, units or modules. The processor 1920 may operate in conjunction with the memory 1930. The processor 1920 may execute program instructions stored in the memory 1930. Optionally, at least one of the one or more memories may be included in the processor.

[0274] The specific connection medium between the transceiver 1910, the processor 1920 and the memory 1930 is not limited in the embodiment of the present application. Fig.19 The memory 1930, the processor 1920 and the transceiver 1910 are connected via a bus 1940. Fig.19 The connections between the other components are shown in bold lines, which are only for illustration and are not intended to be limiting. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Fig.19 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0275] In the embodiments of the present application, the processor may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, etc., and may implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of the present application. The general-purpose processor may be a microprocessor or any conventional processor, etc. The steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed by a hardware processor, or may be executed by a combination of hardware and software modules in the processor, etc.

[0276] In the embodiment of the present application, the memory may include, but is not limited to, non-volatile memory such as a hard disk drive (HDD) or a solid-state drive (SSD), a random access memory (RAM), an erasable programmable read-only memory (EPROM), a read-only memory (ROM) or a portable read-only memory (CD-ROM), etc. The memory is any storage medium that can be used to carry or store program codes in the form of instructions or data structures and can be read and / or written by a computer (such as a communication device shown in the present application), but is not limited thereto. The memory in the embodiment of the present application can also be a circuit or any other device that can realize a storage function, for storing program instructions and / or data.

[0277] Exemplarily, the processor 1920 is mainly used to process the communication protocol and communication data, and to control the entire communication device, execute the software program, and process the data of the software program. The memory 1930 is mainly used to store the software program and data. The transceiver 1910 may include a control circuit and an antenna. The control circuit is mainly used for converting the baseband signal and the radio frequency signal and processing the radio frequency signal. The antenna is mainly used to transmit and receive radio frequency signals in the form of electromagnetic waves. The input and output devices, such as a touch screen, a display screen, a keyboard, etc., are mainly used to receive data input by the user and output data to the user.

[0278] When the communication device is turned on, the processor 1920 can read the software program in the memory 1930, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor 1920 performs baseband processing on the data to be sent, and outputs the baseband signal to the RF circuit. The RF circuit performs RF processing on the baseband signal and then sends the RF signal outward in the form of electromagnetic waves through the antenna. When data is sent to the communication device, the RF circuit receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processor 1920. The processor 1920 converts the baseband signal into data and processes the data.

[0279] In another implementation, the RF circuit and antenna may be arranged independently of the processor performing baseband processing. For example, in a distributed scenario, the RF circuit and antenna may be arranged remotely from the communication device.

[0280] It is understandable that the communication device shown in the embodiment of the present application may also have Fig.19The embodiments of the present application do not limit the number of components and the like. The methods executed by the processor and the transceiver shown above are only examples, and the specific steps executed by the processor and the transceiver can refer to the methods described above.

[0281] In another possible implementation, Fig.18 In the communication device shown, the processing unit 1801 may be one or more logic circuits, and the transceiver unit 1802 may be an input / output interface, or a communication interface, or an interface circuit, or an interface, etc. Alternatively, the transceiver unit 1802 may be a sending unit and a receiving unit, the sending unit may be an output interface, the receiving unit may be an input interface, and the sending unit and the receiving unit may be integrated into one unit, such as an input / output interface. Fig. 20 As shown, Fig. 20 The communication device shown includes a logic circuit 2001 and an interface 2002. That is, the processing unit 1801 can be implemented by the logic circuit 2001, and the transceiver unit 1802 can be implemented by the interface 2002. The logic circuit 2001 can be a chip, a processing circuit, an integrated circuit or a system on chip (SoC) chip, etc., and the interface 2002 can be a communication interface, an input / output interface, a pin, etc. For example, Fig. 20 The above communication device is used as an example of a chip, and the chip includes a logic circuit 2001 and an interface 2002 .

[0282] In the embodiment of the present application, the logic circuit and the interface may also be coupled to each other. The embodiment of the present application does not limit the specific connection method between the logic circuit and the interface.

[0283] In some embodiments of the present application, the communication device can be used to execute the steps or functions performed by the AP in the above method embodiments. Exemplarily, the logic circuit 2001 is used to generate a PPDU; the interface 2002 is used to output the PPDU. Optionally, the interface 2002 is also used to input a BA frame.

[0284] In other embodiments of the present application, the communication device may be used to execute the steps or functions executed by the first STA in the above method embodiments, etc. Exemplarily, the interface 2002 is used to input the PPDU; the logic circuit 2001 is used to adjust the OM parameters based on the PPDU.

[0285] Optionally, interface 2002 is also used to output BA frames.

[0286] It can be understood that the specific description of the logic circuit and interface shown in the embodiments of the present application is only an example. For the specific functions or execution steps of the logic circuit and interface, etc., reference can be made to the above-mentioned method embodiments and will not be described in detail here.

[0287] In the above embodiments, the description of PPDU, OM parameters, BA frame, etc. can also refer to the introduction in the above method embodiment, which will not be described in detail here.

[0288] It can be understood that the communication device shown in the embodiment of the present application can implement the method provided in the embodiment of the present application in the form of hardware, or can implement the method provided in the embodiment of the present application in the form of software, etc., and the embodiment of the present application is not limited to this.

[0289] The embodiment of the present application also provides a communication system, which includes a first communication device and a second communication device, and the first communication device and the second communication device are used to execute the method in any of the above embodiments. For example, the first communication device is used to execute the steps or functions executed by the AP in the above method embodiment, and the second communication device is used to execute the steps or functions executed by the first STA in the above method embodiment.

[0290] In addition, the present application also provides a computer program, which is used to implement the operations and / or processing performed by the AP in the method provided by the present application.

[0291] The present application also provides a computer program, which is used to implement the operations and / or processing performed by the first STA in the method provided by the present application.

[0292] The present application also provides a computer-readable storage medium, in which computer codes are stored. When the computer codes are executed on a computer, the computer executes the operations and / or processes performed by the AP in the method provided in the present application.

[0293] The present application also provides a computer-readable storage medium, in which computer codes are stored. When the computer codes are executed on a computer, the computer executes the operations and / or processes performed by the first STA in the method provided in the present application.

[0294] The present application also provides a computer program product, which includes a computer code or a computer program. When the computer code or the computer program runs on a computer, the operations and / or processes performed by the AP in the method provided by the present application are executed.

[0295] The present application also provides a computer program product, which includes a computer code or a computer program. When the computer code or the computer program runs on a computer, the operations and / or processing performed by the first STA in the method provided by the present application are executed.

[0296] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, or it can be an electrical, mechanical or other form of connection.

[0297] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the technical effects of the solutions provided in the embodiments of the present application.

[0298] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0299] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or partly contributed to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a readable storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned readable storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk and other media that can store program code.

[0300] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A communication method, characterized in that: include: Generate a physical layer protocol data unit PPDU, where the PPDU includes a first field, and the duration of the first field is determined by the duration of the first STA adjusting the working mode OM parameter; The PPDU is sent, where the first field is carried in a first resource unit RU, and the first RU is included in the RU corresponding to the first STA.

2. A communication method, characterized in that: include: Receive a physical layer protocol data unit PPDU, where the PPDU includes a first field, where the duration of the first field is determined by the duration of the first STA adjusting the working mode OM parameter, where the first field is carried in a first resource unit RU, and where the first RU is included in the RU corresponding to the first STA; An OM parameter is adjusted based on the PPDU.

3. The method according to claim 1 or 2, characterized in that: The PPDU also includes a first signaling SIG field and a first data field, the first field is located between the first SIG field and the first data field, and the first data field is carried on the first RU.

4. The method according to any one of claims 1 to 3, characterized in that: The PPDU further includes a second field, the second field being located after the first field, the second field including a short training sequence.

5. The method according to claim 4, characterized in that The second field is transmitted by a RU corresponding to at least one STA, and the at least one STA includes the first STA.

6. The method according to any one of claims 1 to 5, characterized in that: The PPDU also includes a third field, which is located after the first field, and the third field is used by the first STA to perform channel estimation after adjusting the OM parameters.

7. The method according to claim 6, characterized in that The third field is transmitted by the RU corresponding to at least one STA, and the at least one STA includes the first STA.

8. The method according to any one of claims 1 to 7, characterized in that: The first field is carried on the RU corresponding to the first STA and the second STA, and the duration of the first field is determined by the duration of adjusting the OM parameters by the first STA and the second STA.

9. The method according to claim 8, characterized in that The PPDU also includes a fourth field, the duration of the fourth field is determined by the duration of the first field and the duration of the second STA adjusting the OM parameters, the fourth field is located after the first field, and the fourth field is carried on the RU corresponding to the second STA.

10. The method according to claim 9, characterized in that The PPDU further includes a fifth field and / or a sixth field, the fifth field or the sixth field is after the fourth field, the fifth field includes a short training sequence, and the sixth field includes a long training sequence.

11. The method according to any one of claims 3 to 10, characterized in that: The first signaling SIG field includes at least one of the following: a starting position of the first field, a starting position of the second field, a starting position of the third field, a length of the first field, a length of the second field, and a length of the third field.

12. The method according to any one of claims 1 to 11, characterized in that: The first field is used to carry data of other STAs except the first STA.

13. The method according to any one of claims 1 to 11, characterized in that: The first field is used to carry first data of the first STA, and the OM parameters corresponding to the first data carried by the first field include the OM parameters before adjustment of the first STA.

14. The method according to claim 13, characterized in that The first data field in the PPDU is used to carry the first data, the first data field is located after the first field, and the OM parameters corresponding to the first data carried by the first data field include the OM parameters after the first STA is adjusted.

15. The method according to any one of claims 1 to 11, characterized in that: The first field includes at least one of the following: a random sequence, a traditional short training sequence field L-STF, a traditional long training sequence field L-LTF, an ultra-high reliability short training sequence field UHR-STF, and an ultra-high reliability long training sequence field UHR-LTF.

16. The method according to any one of claims 1 to 15, characterized in that: The PPDU also includes first indication information, where the first indication information is used to instruct the first STA to adjust the OM parameter.

17. The method according to any one of claims 1 to 16, characterized in that: The method further comprises: A block confirmation BA frame is received, where the BA frame includes second indication information, where the second indication information is used to indicate a duration for the first STA to adjust the OM parameter.

18. The method according to any one of claims 1 to 17, characterized in that: The OM parameters include at least one of the following: modulation and coding scheme MCS, number of spatial streams NSS, bandwidth, transmit power, and receive frequency.

19. The method according to claim 2, characterized in that The adjusting the OM parameter based on the PPDU includes: When the first SIG field of the PPDU contains a user field corresponding to the first STA or the OM parameter indicated by the PPDU is different from the current OM parameter of the first STA or OM parameter adjustment indication information is received, the OM parameter is adjusted based on the PPDU.

20. The method according to claim 19, characterized in that The starting time when the first STA adjusts the OM parameters includes any one of the following items: the time when the first STA detects that the first signaling SIG field contains a user field corresponding to the first STA, the time when the first STA detects the first signaling SIG field, and the starting time of the first field.

21. A communication device, characterized in that: Comprising units for performing the method according to any one of claims 1 to 20.

22. A communication device, characterized in that: including a processor and a memory; The memory is used to store instructions; The processor is configured to execute the instructions so that the method according to any one of claims 1 to 20 is performed.

23. A communication device, characterized in that: comprising a logic circuit and an interface, wherein the logic circuit and the interface are coupled; The interface is used to input and / or output code instructions, and the logic circuit is used to execute the code instructions so that the method described in any one of claims 1 to 20 is executed.

24. A computer-readable storage medium, characterized in that: The computer-readable storage medium is used to store a computer program. When the computer program is executed, the method according to any one of claims 1 to 20 is executed.

25. A computer program, characterized in that When the computer program is executed, the method according to any one of claims 1 to 20 is performed.

26. A communication system, characterized in that: The communication system comprises a first communication device and a second communication device, wherein the first communication device is used to execute the method according to any one of claims 1 or 3-20, and the second communication device is used to execute the method according to any one of claims 2-20.

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