Wireless communication method and communication device

Abstract

Provided are a wireless communication method and a communication device. The method comprises: a first device sending a first PPDU, wherein the first PPDU supports ELR, the first PPDU satisfies a first condition, and the first condition is related to one or more of the following items: the value of a length field in a first SIG field in the first PPDU; and a maximum duration of the first PPDU. For the ELR PPDU, in the present application, the value of the length field in the first SIG field (for example, an ELR-SIG field) may be limited, and / or the maximum duration of the ELR PPDU can be improved, so that the ELR PPDU can be normally sent and received.

Description

Wireless communication methods and communication devices

[0001] This application claims priority to Chinese Patent Application No. PCT / CN2025 / 072733, filed on January 16, 2025, entitled "Wireless Communication Method and Communication Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of communication technology, and more specifically, to a wireless communication method and a communication device. Background Technology

[0003] With technological advancements, enhanced long-range (ELR) technology has emerged. The physical layer protocol data unit (PPDU) supporting ELR can be called an ELR PPDU. However, some issues regarding ELR PPDU still need to be addressed. Summary of the Invention

[0004] This application provides a wireless communication method and a communication device. The various aspects covered by this application are described below.

[0005] In a first aspect, a wireless communication method is provided. The method includes: a first device transmitting a first PPDU; wherein the first PPDU supports ELR, the first PPDU satisfies a first condition, the first condition being related to one or more of the following: the value of a length field in a first signal (SIG) field of the first PPDU; and the maximum duration of the first PPDU.

[0006] Secondly, a wireless communication method is provided. The method includes: a second device receiving a first PPDU transmitted by a first device; wherein the first PPDU supports ELR, the first PPDU satisfies a first condition, the first condition being related to one or more of the following: the value of a length field in a first signal SIG field of the first PPDU; and the maximum duration of the first PPDU.

[0007] Thirdly, a communication device is provided, which is a first device, comprising: a transmitting unit for transmitting a first PPDU; wherein the first PPDU supports ELR, the first PPDU satisfies a first condition, the first condition being related to one or more of the following: the value of the length field in the first signal SIG field of the first PPDU; the maximum duration of the first PPDU.

[0008] Fourthly, a communication device is provided, which is a second device. The communication device includes: a receiving unit for receiving a first PPDU transmitted by a first device; wherein the first PPDU supports ELR, the first PPDU satisfies a first condition, and the first condition is related to one or more of the following: the value of the length field in the first signal SIG field of the first PPDU; and the maximum duration of the first PPDU.

[0009] Fifthly, a communication device is provided, including a processor and a memory, the memory for storing one or more computer programs, the processor for calling the computer programs in the memory to enable some or all of the steps of the methods described in the preceding aspects of the communication device.

[0010] Sixthly, embodiments of this application provide a communication system that includes the aforementioned communication device. In another possible design, the system may further include other devices that interact with the communication device as described in the embodiments of this application.

[0011] In a seventh aspect, embodiments of this application provide a computer-readable storage medium storing a computer program that causes a communication device to perform some or all of the steps in the methods described above.

[0012] Eighthly, embodiments of this application provide a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program operable to cause a communication device to perform some or all of the steps of the methods described in the foregoing aspects. In some implementations, the computer program product may be a software installation package.

[0013] Ninthly, embodiments of this application provide a chip including a memory and a processor, the processor being able to call and run a computer program from the memory to implement some or all of the steps described in the methods of the foregoing aspects.

[0014] For ELR PPDUs, this application may restrict the value of the length field in the first SIG field (e.g., the ELR-SIG field) and / or limit the maximum duration of the ELR PPDU, thereby enabling the ELR PPDU to be sent and received normally. Attached Figure Description

[0015] Figure 1 is a schematic diagram of the wireless communication system used in the embodiments of this application.

[0016] Figure 2 is an example diagram of an ELR PPDU format.

[0017] Figure 3 is a schematic flowchart of a wireless communication method provided in an embodiment of this application.

[0018] Figure 4 is a schematic structural diagram of a communication device provided in an embodiment of this application.

[0019] Figure 5 is a schematic structural diagram of another communication device provided in an embodiment of this application.

[0020] Figure 6 is a schematic structural diagram of a communication device provided in an embodiment of this application. Detailed Implementation

[0021] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0022] Communication system

[0023] The technical solutions of this application can be applied to various communication systems, such as wireless local area networks (WLAN), Wi-Fi, high-performance radio local area networks (HIPELAN), wide area networks (WAN), cellular networks, or other communication systems. For example, the technical solutions provided in this application can be applied to communication systems using the 802.11 standard. Exemplarily, the 802.11 standard includes, but is not limited to, the 802.11ax standard, the 802.11be standard, the 802.11bn standard, and the next-generation 802.11 standard (post-802.11bn).

[0024] Figure 1 shows a schematic diagram of a communication system applicable to an embodiment of this application. Referring to Figure 1, the communication devices in the communication system 100 may include AP111, AP112, and station (STA) 121 and STA122, wherein STA121 can access the network through AP111, and STA122 can access the network through AP112.

[0025] In some implementations, a STA can establish an association with one or more APs, after which the associated STAs and APs can communicate with each other. As shown in Figure 1, AP 111 and STA 121 can communicate after establishing an association, and AP 112 and STA 122 can communicate after establishing an association.

[0026] In some implementations, the communication in the communication system 100 can be communication between an AP and a non-AP STA, communication between two non-AP STAs, or communication between a STA and a peer STA. Here, a peer STA can refer to a device that communicates with the STA's counterpart. For example, a peer STA may be an AP or a non-AP STA.

[0027] It should be understood that Figure 1 exemplarily shows two AP STAs and two non-AP STAs. The communication system 100 may also include more AP STAs, or the communication system 100 may include other numbers of non-AP STAs. This application embodiment does not limit this.

[0028] In addition, the above-mentioned communication system can be applied to scenarios involving multi-device collaboration, such as multi-AP (multi-access points) collaboration or multi-site collaboration.

[0029] In the embodiments of this application, the names of AP and / or STA are not limited. In some scenarios, AP can also be called AP STA, that is, in a sense, AP is also a type of STA. In other scenarios, STA can be called non-AP STA.

[0030] In some scenarios, the aforementioned communication equipment can also be a "multi-link device (MLD)," meaning a device that can communicate through multiple communication links. These multiple communication links can include communication links in different frequency bands, such as millimeter-wave bands and / or low-frequency bands. Typically, if the multi-link device is an access point (AP), it can also be called an "AP MLD." If the multi-link device is a non-AP STA, it can also be called a "non-AP MLD."

[0031] In this application embodiment, the AP can be a device in a wireless network. The AP can be a communication server, router, switch, bridge, or other communication entity. Alternatively, the AP can include various forms of macro base stations, micro base stations, relay stations, etc. Of course, the AP can also be a chip, circuit, or processing system within these various forms of devices, thereby implementing the methods and functions of this application embodiment. APs can be applied in various scenarios, such as sensor nodes in smart cities (e.g., smart water meters, smart electricity meters, smart air quality monitoring nodes), smart devices in smart homes (e.g., smart cameras, projectors, displays, televisions, audio equipment, refrigerators, washing machines, etc.), nodes in the Internet of Things (IoT), entertainment terminals (e.g., AR, VR, and other wearable devices), smart devices in smart offices (e.g., printers, projectors, etc.), vehicle-to-everything (V2X) devices, and some infrastructure in daily life scenarios (e.g., vending machines, supermarket self-service navigation kiosks, self-service checkout machines, self-service ordering machines, etc.).

[0032] In some implementations, the role of the STA in the communication system is not absolute; in some scenarios, the STA can act as an AP. For example, in a scenario where a mobile phone connects to a router, the mobile phone can be a non-AP STA, while when the mobile phone acts as a hotspot for other mobile phones, it takes on the role of an AP.

[0033] In the embodiments of this application, the STA can be a device with wireless transceiver capabilities, such as one that supports the 802.11 series of protocols and can communicate with the AP or other STAs. For example, an STA is any user communication device that allows users to communicate with the AP and thus with the WLAN. STAs include, for example, user equipment (UE), mobile station (MS), mobile terminal (MT), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication equipment, user agent, or user device, etc.

[0034] In this application embodiment, the STA can also be a device that provides voice / data / image connectivity to the user, such as a handheld device, vehicle device, home device, home appliance, gaming device, etc., with wireless connection function or equipped with a wireless communication module. Examples include: mobile phones, tablets, laptops, PDAs, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self-driving vehicles, drones or aerial photography equipment, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), handheld devices with wireless communication capabilities, computing devices or other processing devices connected to a wireless modem, in-vehicle devices, wearable devices, terminal devices in 5G networks, or future evolution of public land mobile communication networks. Terminal devices in a network (PLMN) can also be televisions, refrigerators, washing machines, kitchen appliances, door locks, fish tanks, robot vacuum cleaners, game consoles, cameras / camcorders, etc. with wireless connectivity, but this application embodiment is not limited to these.

[0035] By way of example and not limitation, in this embodiment, the STA can also be a wearable device. Wearable devices, also known as wearable smart devices, are a general term for devices that utilize wearable technology to intelligently design and develop everyday wearables, such as glasses, gloves, watches, clothing, and shoes. Examples include smartwatches or smart glasses, as well as devices that focus on a specific type of application function and require cooperation with other devices such as smartphones, such as various smart bracelets and smart jewelry for vital sign monitoring.

[0036] Furthermore, in this embodiment, the STA can also be a terminal device in an Internet of Things (IoT) system. IoT is an important component of future information technology development, and its main technical feature is connecting objects to networks through communication technologies, thereby realizing an intelligent network for human-machine interconnection and object-to-object interconnection. In this embodiment, IoT technology can achieve massive connectivity, deep coverage, and low terminal power consumption through technologies such as narrowband (NB).

[0037] Furthermore, in this embodiment, the STA can be a device in a vehicle-to-everything (V2X) system. The communication methods in a V2X system are collectively referred to as V2X (where X represents anything). For example, V2X communication includes: vehicle-to-vehicle (V2V) communication, vehicle-to-infrastructure (V2I) communication, vehicle-to-pedestrian (V2P) communication, or vehicle-to-network (V2N) communication, etc.

[0038] In addition, in the embodiments of this application, the STA may also include sensors such as smart printers, train detectors, and gas stations. Its main functions include collecting data (some terminal devices), receiving control information and downlink data from the AP, and sending electromagnetic waves to transmit data to the AP.

[0039] In addition, the AP in this application embodiment can be a device for communicating with the STA. The AP can be a network device in a wireless local area network, and the AP can be used to communicate with the STA through the wireless local area network.

[0040] From the perspective of the communication standards supported by the AP, in some implementations, the AP can be a device that supports the 802.11be standard. The AP can also be a device that supports various current and future 802.11 family WLAN standards such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a.

[0041] From the perspective of the communication standards supported by the STA, in some implementations, non-AP STAs can support the 802.11be standard. Non-AP STAs can also support various current and future 802.11 family of wireless local area networks (WLAN) standards, such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a.

[0042] In this application embodiment, the frequency bands supported by WLAN technology are not limited. In some implementations, the frequency bands supported by WLAN technology may include, but are not limited to: low frequency bands (e.g., 2.4GHz, 5GHz, 6GHz) and high frequency bands (e.g., 45GHz, 60GHz).

[0043] It should be understood that the specific forms of STA and AP are not specifically limited in the embodiments of this application, and are merely illustrative examples.

[0044] Maximum PPDU length

[0045] In related technologies, static PHY characteristics are provided through PLME-CHARACTERISTICS service primitives. If listed in Table 1 (EHT PHY Characteristics), then the static EHT PHY characteristics should be as shown in Table 1 (EHT PHY Characteristics). Otherwise, if listed in Table 2 (HE PHY Characteristics), then the static EHT PHY characteristics should be as shown in Table 2 (HE PHY Characteristics). Otherwise, the static EHT PHY characteristics are as shown in Table 3 (HT PHY Characteristics).

[0046] Table 1

[0047] Table 2

[0048] Table 3

[0049] Table 4

[0050] It should be noted that the parameter aSignalExtension in this application can be an integer. The parameter aSignalExtension can represent the duration (in microseconds) of the signal extension (i.e., a period of no transmission). That is, the parameter aSignalExtension can represent the no-transmission period immediately following a specific PPDU format. For a description of channel extension, please refer to relevant technologies.

[0051] It should be noted that for detailed information on some of the reference documents in this application (such as the various tables), please refer to the relevant technologies; this application will not repeat them here.

[0052] As shown in Tables 1 to 4, the maximum duration of PPDU specified in the relevant technologies (indicated by the parameter aPPDUMaxTime) is mostly 5.484ms.

[0053] ELR

[0054] Access points (APs) typically have higher transmission power than non-AP STAs, leading to a significant difference in downlink (DL) and uplink (UL) link budgets. A DL link refers to the link from the AP to a non-AP STA, while a UL link refers to the link from a non-AP STA to the AP. In some cases, the budget difference between DL and UL links can reach 6 dB. Some communication standards (such as UHR) have proposed the need to increase transmission range to address the uplink and downlink budget imbalance.

[0055] To address the aforementioned issues or needs, some communication technologies have proposed ELR technology to improve coverage. PPDUs that support ELR technology can be called ELR PPDUs. PPDUs that do not support ELR technology can be called non-ELR PPDUs.

[0056] ELR technology can be used for UL transmission. For example, ELR PPDUs can be used for UL transmission in the 5GHz and 6GHz bands. ELR technology can also be used for DL ​​transmission. For example, ELR PPDUs can be used for both DL and UL transmission in the 2.4GHz band.

[0057] Figure 2 is a sample format diagram of an ELR PPDU. The following is a description of the various fields contained in the ELR PPDU shown in Figure 2.

[0058] As shown in Figure 2, compared to non-ELR PPDUs, ELR PPDUs can retain both the legacy preamble and the universal signal field (U-SIG). The legacy preamble can include one or more of the following: legacy short training field (L-STF), legacy long training field (L-LTF), legacy signal field (L-SIG), and repeated legacy signal field (RL-SIG).

[0059] The U-SIG field is followed by the ELR mark field. ELR mark symbols are used for ELR pattern classification. The ELR mark field can include two symbols. Each symbol can last for 4 μs. The total duration of the ELR mark field can be 8 μs.

[0060] As shown in Figure 2, the ELR PPDU may also include one or more of the following fields: UHR-STF, UHR-LTF, ELR-SIG, ELR data (ELR-data), and PE.

[0061] The duration of the PE field can be 8 μs.

[0062] The ELR data field includes one or more symbols. These symbols can be, for example, ELR data symbols containing GI. The duration of an ELR data symbol containing GI can be 14.4 μs.

[0063] The OFDM symbol duration for the ELR data field including GI in the UHR ELR PPDU can be obtained through T. SYM,Data,ELR It indicates. T SYM,Data,ELR =14.4μs=T DFT,UHR +T GI,Data,ELR =1.125×T DFT,UHR .

[0064] The ELR-SIG field can be divided into two parts: ELR-SIG1 and ELR-SIG2. Table 5 shows the possible fields and meanings of each bit in the ELR-SIG field.

[0065] Table 5

[0066] Transmitting the ELR PPDU according to the above format and field specifications may present some problems. For example, the length field in Table 5 is 9 bits, and the maximum value can be 2. 9 That is, the maximum number of ELR data symbols is 2. 9 =512, which may cause ELR PPDU to exceed 5.484ms.

[0067] Figure 3 is a schematic flowchart of a wireless communication method provided in an embodiment of this application. The method shown in Figure 3 can be executed by a first device and a second device. Both the first device and the second device can be the communication devices described above. For example, the first device may include a non-AP STA, and the second device may include an AP. Alternatively, the first device may include an AP, and the second device may include a non-AP STA. Or, both the first device and the second device may be non-AP STAs.

[0068] The method shown in Figure 3 may include step S310.

[0069] Step S310: The first device sends the first PPDU to the second device.

[0070] In some embodiments, the first PPDU may support ELR. That is, the first PPDU may be the ELR PPDU described above. The format of the first PPDU may be as shown in Figure 2.

[0071] In some embodiments, the first PPDU may satisfy a first condition. That is, this application may restrict the first PPDU by means of a first condition.

[0072] The first condition may be related to one or more of the following: the number of symbols in the data field of the first PPDU; the maximum duration of the first PPDU.

[0073] In some embodiments, the value of the length field in the first SIG field of the first PPDU can be used to indicate the number of signs in the data field of the first PPDU. Therefore, the first condition can be related to the value of the length field in the first SIG field of the first PPDU.

[0074] In some embodiments, the first SIG field is used to carry information such as the modulation and encoding format of the data field in the demodulated first PPDU. The first SIG field can be, for example, an ELR-SIG field. Exemplarily, the ELR-SIG field may include some or all of the fields shown in Table 5.

[0075] Therefore, for ELR PPDU, this application can limit the value of the length field in the first SIG field (e.g., the ELR-SIG field) and / or limit the maximum duration of the ELR PPDU, so that the ELR PPDU can be sent and received normally.

[0076] In some embodiments, the first condition may include one or more of the following: the value of the length field is less than or equal to a first length, and the number of signs in the data field is less than or equal to a first number of signs. Wherein, the first length is a positive integer, and the first number of signs is a positive integer.

[0077] As mentioned above, the sign count of a data field can be determined by the value indicated by the length field. Therefore, the first condition may include that the sign count of the data field corresponding to the value indicated by the length field is less than or equal to a first sign count.

[0078] Therefore, it can be seen that this application has restricted the maximum value of the length field in the first SIG field.

[0079] For example, the first length can be less than the maximum value corresponding to the number of bits occupied by the length field. As shown in Table 5, the length field in the ELR-SIG field occupies 9 bits. The maximum value that 9 bits can indicate is 2. 9 =512. In this case, the first length can be less than 512.

[0080] As shown in Table 5, related technologies only specify the number of bits occupied by the length field in the ELR-SIG field. This application further limits the maximum value of the length field, which can prevent the length field value from being too large, thereby preventing the duration of the ELR PPDU from exceeding the maximum PPDU duration specified in related technologies or this application due to too many data field symbols.

[0081] In some embodiments, the first length is 373; and / or, the first symbol number is 374. For example, when the maximum duration of the PPDU is 5.484 milliseconds, the first length is 373; and / or, the first symbol number is 374. It is understood that the value of the length field of the ELR-SIG in the ELR PPDU indicates that a symbol number exceeding 374 is not allowed; and / or, a value greater than 373 in the length field of the ELR-SIG in the ELR PPDU is not allowed.

[0082] Given a maximum PPDU duration of 5.484 milliseconds, and considering the preamble and PE of the ELR PPDU, the maximum duration of the data field can be calculated to be aPPDUMaxTime-T. ELR preamble and PE =5484-96.8=5387.2μs. Where, T ELR preamble and PE This represents the preamble of the ELR PPDU and the total duration of the PE. T ELR preamble and PE The calculation can be: T ELR Preamble and PE = 8 + 8 + 4 + 4 + 8 + 8 + 4 + 16 + 28.8 + 8 = 96.8 μs. Based on this, the maximum number of symbols in an ELR data field is:

[0083] In some embodiments, the first length is 372; and / or, the first symbol number is 373. For example, when the maximum duration of the PPDU is 5.484 milliseconds, the first length is 372; and / or, the first symbol number is 373. It is understood that the value of the length field of the ELR-SIG in the ELR PPDU indicates that a symbol number exceeding 373 is not allowed; and / or, a value greater than 372 in the length field of the ELR-SIG in the ELR PPDU is not allowed.

[0084] Given a maximum PPDU duration of 5.484 milliseconds, and considering the ELR PPDU preamble, PE, and signal spread, the maximum duration of the data field can be calculated. Specifically, the maximum duration of the data field can be calculated based on the maximum possible signal spread time. For example, the maximum signal spread time could be 6 µs corresponding to the 2.4 GHz band. Therefore, the maximum duration of the data field can be: aPPDUMaxTime-T ELR preamble and PE -SignalExtension = 5484 - 96.8 - 6 = 5381.2us. Where, T ELR The preamble and PE represent the total duration of the preamble and PE in the ELR PPDU, while SignalExtension is the signal extension time. Based on this, the maximum number of symbols in the ELR data field is calculated using the longest duration of the data field and the duration of a single symbol.

[0085] In some embodiments, in the first frequency band, the first length is 373, and / or the first symbol number is 374; and / or, in the second frequency band, the first length is 372, and / or the first symbol number is 373. In other words, different values ​​for the first length and / or the first symbol number can be specified for different frequency bands. For example, the first frequency band may include the 5GHz and / or 6GHz bands. As another example, the second frequency band may include the 2.4GHz band. For example, in the 2.4GHz band, the maximum duration of the data field can be: aPPDUMaxTime-T ELR preamble and PE -SignalExtension = 5484 - 96.8 - 6 = 5381.2us. Where, T ELR preamble and PE This represents the total duration of the preamble and PE of the ELR PPDU, with SignalExtension representing the signal extension time. Based on this, the maximum number of symbols in the ELR data field is calculated using the longest duration of the data field and the duration of a single symbol. For example, in the 5GHz and / or 6GHz bands, the maximum duration of a data field can be: aPPDUMaxTime-TELR preamble and PE =5484-96.8=5387.2μs. Based on this, the maximum number of signs in an ELR data field is:

[0086] In the aforementioned embodiment, the length field value of ELR-SIG in the ELR PPDU indicates the number of symbols in the ELR data. Due to the limitation of the maximum PPDU duration of 5.484 milliseconds, it cannot reach the maximum length value of 512 symbols indicated by 9 bits. As one implementation, across all frequency bands, the maximum number of symbols that can be transmitted is calculated by dividing the maximum transmission duration by the duration of a single symbol and rounding down, resulting in a maximum transmittable symbol count of 374. This means that when the number of transmitted data symbols indicated by ELR-SIG is less than or equal to 374, the indicated number of transmitted symbols is correct. However, if the number of transmitted data symbols indicated by ELR-SIG is greater than 374, it will cause the maximum duration of the PPDU to exceed the 5.484 millisecond limit, which is an unacceptable erroneous indication or error case. Since the difference between the ELR-SIG indication value and the maximum transmittable symbol value is 1, the ELR-SIG indication value cannot be greater than 373.

[0087] As another implementation scheme, the number of symbols indicated by ELR-SIG is considered in different frequency bands. In the first type of frequency band, such as 5G, 6G, and Sub-7G, the length of the PPDU is not affected by other factors, and the length value is calculated based on 5.484 milliseconds. The number of transmitted data symbols indicated by ELR-SIG is limited to 374, and the indication value of ELR-SIG cannot be greater than 373. In the second type of frequency band, such as the 2.4G frequency band, the length of the PPDU is also affected by other factors, such as the total duration of the ELR PPDU preamble and / or PE. In this case, the duration of the PPDU preamble and / or PE needs to be subtracted from the maximum transmission duration of the PPDU. Thus, the maximum number of symbols that ELR-SIG can indicate in the second frequency band is less than that in the first frequency band. For example, after subtracting the duration of the PPDU preamble and / or PE from 5.484 milliseconds, the number of transmitted data symbols that can be indicated is limited to 373, and the indication value of ELR-SIG cannot be greater than 372.

[0088] Based on the limitation of the first length or the first number of symbols, it is not necessary to modify the limitation on the maximum duration of the PPDU in the related technology, so that the normal transmission of ELR PPDU can be achieved with minimal modification to the related technology.

[0089] Tables 6-1, 6-2, 6-3, 7-1, 7-2, and 7-3 each show an example of a constraint on the length field.

[0090] Table 6-1

[0091] Table 6-2

[0092] Table 6-3

[0093] Table 7-1

[0094] Table 7-2

[0095] Table 7-3

[0096] In some embodiments, the maximum duration of the first PPDU is less than or equal to the first duration. That is, this application can set a corresponding maximum duration for the ELR PPDU so that the maximum duration of the ELR PPDU can satisfy the transmission of the ELR PPDU.

[0097] In some embodiments, the first duration can be determined based on the maximum value of the length field in the first SIG field. For example, the maximum value of the length field in the first SIG field can be 2. 9 =512. The first duration can be determined based on the length field being 512.

[0098] For example, the first duration can be 7.4696ms. The first duration can be calculated as follows: the maximum value of the length field in the first SIG field can be 2. 9 With a value of 512, considering the preamble and PE of the ELR PPDU, the maximum duration of the ELR PPDU can be T. ELR preamble and PE +512×14.4=96.8+7372.8=7469.6μs=7.4696ms.

[0099] It should be noted that the first duration can also be a value obtained by taking 7.4696 or rounding it. For example, the first duration can also be 7.470, 7.469, 7.46, 7.5 or 7.4, etc.

[0100] In some embodiments, the first duration can be indicated by the PLME-CHARACTERISTICS.confirm primitive parameter. For example, the PLME-CHARACTERISTICS.confirm primitive parameter may include a first parameter. This first parameter can be used to indicate the first duration. The first parameter can be, for example, called aELRPPDUMaxTime. aELRPPDUMaxTime can be an integer. aELRPPDUMaxTime can be used to indicate the maximum duration of an ELR PPDU in milliseconds.

[0101] In related technologies, the aPPDUMaxTime parameter in the PLME-CHARACTERISTICS.confirm primitive can be used to indicate the maximum duration of a non-ELR PPDU. In this case, aPPDUMaxTime can also be called aNonELRPPDUMaxTime.

[0102] In some embodiments, the first condition may be related to one or more of the following: the maximum length of the first PSDU corresponding to the first PPDU; the total duration of the fields preceding the ELR-STF field in the first PPDU. That is, this application limits the maximum length of the ELR PSDU and / or limits the total duration of the fields preceding the ELR-STF field in the ELR PPDU.

[0103] In some embodiments, the first condition may include: the maximum length of the first PSDU is less than or equal to the second length. Therefore, this application limits the maximum length of the ELR PSDU to not exceed the second length.

[0104] In some embodiments, the second length may be determined based on one or more of the following: the maximum duration of the first PPDU; the modulation scheme of the first PPDU; the code rate of the first PPDU; the bandwidth of the first PPDU; the spatial stream number of the first PPDU; the GI duration of the first PPDU; and the duration of the PE field in the first PPDU.

[0105] For example, the second length may be determined based on one or more of the following: the modulation scheme of the first PPDU is QPSK; the code rate of the first PPDU is 1 / 2; the bandwidth of the first PPDU is 20MHz; the spatial stream number of the first PPDU is 1; the GI duration of the first PPDU is 1.6μs; 2×UHR-LTF; and the PE field duration of the first PPDU is 8μs.

[0106] In some embodiments, the second length may be 2242 or 3070 bytes.

[0107] Taking the maximum duration of the first PPDU as 5.484ms (the maximum value of the length field is 374) as an example, the calculation process for the second length can be: (374×48-16) / 8=2242 bytes. Among them, each ELR data symbol carries 48 bits, and the number of bits in the SERVICE field in the ELR data is 16.

[0108] Taking the maximum duration of the first PPDU as 7.4696ms (with a maximum length field value of 512) as an example, the calculation process for the second length can be: (512×48-16) / 8=3070 bytes. Among them, each ELR data symbol carries 48 bits, and the number of bits in the service field of the ELR data is 16.

[0109] In some embodiments, the second length can be indicated by the PLME-CHARACTERISTICS.confirm primitive parameter. For example, the PLME-CHARACTERISTICS.confirm primitive parameter may include a second parameter. This second parameter can be used to indicate a second duration. The second parameter may, for example, be called aELRPSDUMaxLength. aELRPSDUMaxLength can be an integer. aELRPSDUMaxLength can be used to indicate the maximum number of octets in a PSDU that can be transmitted in an ELR PPDU.

[0110] In related technologies, the `aPSDUMaxLength` parameter in the `PLME-CHARACTERISTICS.confirm` primitive can be used to indicate the maximum length of a non-ELR PSDU. In this case, `aPSDUMaxLength` can also be called `aNonELRPSDUMaxLength`.

[0111] The following explains the possible implementations of PLME-CHARACTERISTICS.confirm.

[0112] Method 1

[0113] In Method 1, the maximum value for the number of signs in the ELR-Data indicated by the length field is 374. PLME-CHARACTERISTICS.confirm can be represented as follows.

[0114] PLME-CHARACTERISTICS.confirm(

[0115] aNonELRPSDUMaxLength

[0116] aELRPSDUMaxLength

[0117] )

[0118] The parameters included in PLME-CHARACTERISTICS.confirm can be defined as shown in Table 8, and the values ​​of the parameters can be shown in Table 9.

[0119] Table 8

[0120] Table 9

[0121] Method 2

[0122] In Method 2, the maximum value for the number of signs in the ELR-Data indicated by the length field is 512. PLME-CHARACTERISTICS.confirm can be represented as follows.

[0123] PLME-CHARACTERISTICS.confirm(

[0124] aNonELRPPDUMaxTime

[0125] aNonELRPSDUMaxLength

[0126] aELRPPDUMaxTime

[0127] aELRPSDUMaxLength

[0128] )

[0129] The parameters included in PLME-CHARACTERISTICS.confirm can be defined as shown in Table 10, and the values ​​of the parameters can be shown in Table 11.

[0130] Table 10

[0131] Table 11

[0132] It should be noted that in the examples of this application (including Method 1 or Method 2), PLME-CHARACTERISTICS.confirm may also include other parameters, and this application does not limit this.

[0133] In some embodiments, the first condition may include: the total duration of the fields preceding the ELR-STF field in the first PPDU is less than or equal to the second time. That is, this application may limit the total duration of the fields preceding the ELR-STF field in the ELR PPDU to be less than or equal to the second time.

[0134] In some embodiments, the second time is indicated by aRxPHYStartDelay. Therefore, based on the first condition, this application can restrict the value of aRxPHYStartDelay for the ELR PPDU. In other words, this application provides the value of aRxPHYStartDelay for the ELR PPDU.

[0135] Based on the fields preceding the ELR-STF field, the value of aRxPHYStartDelay for the ELR PPDU can be calculated as: aRxPHYStartDelay=8+8+4+4+8+8=40μs.

[0136] Table 12 shows examples of values ​​for aRxPHYStartDelay.

[0137] Table 12

[0138] It should be noted that, unless otherwise specified, the length field in this application refers to the length field in the first SIG field of the first PPDU.

[0139] The method embodiments of this application have been described in detail above. The apparatus embodiments of this application are described in detail below. It should be understood that the descriptions of the method embodiments correspond to the descriptions of the apparatus embodiments. Therefore, any parts not described in detail can be referred to the foregoing method embodiments.

[0140] Figure 4 is a schematic structural diagram of a communication device 400 provided in an embodiment of this application. The communication device 400 is a first device. The communication device 400 may include a transmitting unit 410.

[0141] The transmitting unit 410 is used to transmit a first PPDU; wherein the first PPDU supports ELR, the first PPDU satisfies a first condition, the first condition being related to one or more of the following: the value of the length field in the first signal SIG field of the first PPDU; the maximum duration of the first PPDU.

[0142] In an optional embodiment, the transmitting unit 410 may be a transceiver 630. The communication device 400 may also include a processor 610 and a memory 620, as shown in FIG6.

[0143] In this embodiment, the communication device 400 can be used to execute some or all of the method steps executed by the first device in the above method embodiments. The communication device 400 includes units or modules for executing the aforementioned method steps. The method flow has been described in detail in the foregoing embodiments. The modules in this embodiment have the same function or perform the same steps, and will not be described again here. However, those skilled in the art should know that the textual descriptions corresponding to the foregoing method embodiments can be incorporated into this embodiment and correspond to the modules in the communication device 400.

[0144] Figure 5 is a schematic structural diagram of a communication device 500 provided in an embodiment of this application. The communication device 500 is a second device. The communication device 500 may include a receiving unit 510.

[0145] The receiving unit 510 is used to receive a first PPDU sent by the first device; wherein the first PPDU supports ELR, the first PPDU satisfies a first condition, the first condition being related to one or more of the following: the value of the length field in the first signal SIG field of the first PPDU; the maximum duration of the first PPDU.

[0146] In an optional embodiment, the receiving unit 510 may be a transceiver 630. The communication device 500 may also include a processor 610 and a memory 620, as shown in FIG6.

[0147] In this embodiment, the communication device 500 can be used to execute some or all of the method steps executed by the second device in the above method embodiments. The communication device 500 includes units or modules for executing the aforementioned method steps. The method flow has been described in detail in the foregoing embodiments. The modules in this embodiment have the same function or perform the same steps, and will not be described again here. However, those skilled in the art should know that the textual descriptions corresponding to the foregoing method embodiments can be incorporated into this embodiment and correspond to the modules in the communication device 500.

[0148] Figure 6 is a schematic structural diagram of a communication apparatus according to an embodiment of this application. The dashed lines in Figure 6 indicate that the unit or module is optional. This apparatus 600 can be used to implement the methods described in the above method embodiments. The apparatus 600 can be a chip or a communication device.

[0149] Apparatus 600 may include one or more processors 610. The processor 610 may support apparatus 600 in implementing the methods described in the preceding method embodiments. The processor 610 may be a general-purpose processor or a special-purpose processor. For example, the processor may be a central processing unit (CPU). Alternatively, the processor may be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor.

[0150] The apparatus 600 may further include one or more memories 620. The memories 620 store a program that can be executed by the processor 610, causing the processor 610 to perform the methods described in the preceding method embodiments. The memories 620 may be independent of the processor 610 or integrated within the processor 610.

[0151] The device 600 may also include a transceiver 630. The processor 610 can communicate with other devices or chips via the transceiver 630. For example, the processor 610 can send and receive data with other devices or chips via the transceiver 630.

[0152] This application also provides a computer-readable storage medium for storing a program. This computer-readable storage medium can be applied to the communication device provided in this application, and the program causes a computer to execute the methods performed by the communication device in various embodiments of this application.

[0153] This application also provides a computer program product. The computer program product includes a program. The computer program product can be applied to the communication device provided in this application embodiment, and the program causes a computer to execute the methods performed by the communication device in various embodiments of this application.

[0154] This application also provides a computer program. This computer program can be applied to the communication device provided in this application, and causes the computer to execute the methods performed by the communication device in various embodiments of this application.

[0155] It should be understood that the terms "system" and "network" in this application can be used interchangeably. Furthermore, the terminology used in this application is only for explaining specific embodiments of the application and is not intended to limit the application. The terms "first," "second," "third," and "fourth," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. In addition, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0156] In the embodiments of this application, a "field" may also be referred to as a "domain", "subfield", or "subfield". A field may occupy one or more bytes (byte / octet), or a field may occupy one or more bits (bit).

[0157] The field names defined in the embodiments of this application are merely examples, and the field may have other names.

[0158] Unless otherwise stated, this application does not restrict the position of the fields. That is, the position of the fields can be adjusted.

[0159] In the embodiments of this application, the term "instruction" can be a direct instruction, an indirect instruction, or an indication of a relationship. For example, A instructing B can mean that A directly instructs B, such as B being able to obtain information through A; it can also mean that A indirectly instructs B, such as A instructing C, so B can obtain information through C; or it can mean that there is a relationship between A and B.

[0160] In the embodiments of this application, "B corresponding to A" means that B is associated with A, and B can be determined based on A. However, it should also be understood that determining B based on A does not mean that B is determined solely based on A; B can also be determined based on A and / or other information.

[0161] In the embodiments of this application, the term "correspondence" can indicate a direct or indirect correspondence between two things, or an association between two things, or a relationship such as instruction and being instructed, configuration and being configured.

[0162] In this application embodiment, "predefined" or "preconfigured" can be implemented by pre-storing corresponding codes, tables, or other means that can be used to indicate relevant information in the device (e.g., including AP and STA). This application does not limit the specific implementation method. For example, predefined can refer to what is defined in the protocol.

[0163] In the embodiments of this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0164] In the embodiments of this application, "comprising" can refer to direct inclusion or indirect inclusion. Optionally, "comprising" mentioned in the embodiments of this application can be replaced with "indicating" or "used to determine". For example, "A includes B" can be replaced with "A indicates B" or "A is used to determine B".

[0165] In the various embodiments of this application, the order of the above-mentioned processes does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0166] In this application embodiment, the "protocol" may refer to a standard protocol in the field of communication, such as the WiFi protocol and related protocols applied to future WiFi communication systems, and this application does not limit it.

[0167] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0168] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0169] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0170] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can read or a data storage device such as a server or data center that integrates one or more available media. The available media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., digital video discs, DVDs) or semiconductor media (e.g., solid-state disks, SSDs), etc.

[0171] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A wireless communication method, characterized in that, include: The first device sends the first physical layer protocol data unit (PPDU); The first PPDU supports enhanced long-range ELR, and the first PPDU satisfies a first condition, which is related to one or more of the following: the value of the length field in the first signal SIG field of the first PPDU; and the maximum duration of the first PPDU.

2. The method according to claim 1, characterized in that, The first condition includes one or more of the following: The value of the length field is less than or equal to the first length; The number of signs in the data field corresponding to the value indicated by the length field is less than or equal to the first number of signs.

3. The method according to claim 2, characterized in that, The first length is 373; and / or The value of the first symbol number is 374.

4. The method according to claim 2, characterized in that, The first length is 372; and / or The value of the first symbol number is 373.

5. The method according to claim 2, characterized in that, In the first frequency band, the first length is 373, and / or, the first symbol number is 374; and / or, In the second frequency band, the first length is 372, and / or the first symbol number is 373.

6. The method according to claim 5, characterized in that, The first frequency band includes the 5GHz and / or 6GHz bands.

7. The method according to claim 5 or 6, characterized in that, The second frequency band includes the 2.4 GHz band.

8. The method according to claim 1, characterized in that, The first condition includes: The maximum duration of the first PPDU is less than or equal to the first duration.

9. The method according to claim 8, characterized in that, The first duration is determined based on the maximum value of the length field in the first SIG field.

10. The method according to claim 8 or 9, characterized in that, The first duration is 7.4696ms.

11. The method according to any one of claims 8-10, characterized in that, The first duration is indicated by the PLME-CHARACTERISTICS.confirm primitive parameter.

12. The method according to any one of claims 1-11, characterized in that, The first condition is also related to one or more of the following: The maximum length of the first physical layer service data unit (PSDU) corresponding to the first PPDU; The total duration of the field preceding the ELR-STF field in the first PPDU, which enhances the long-distance short training field.

13. The method according to claim 12, characterized in that, The first condition includes: The maximum length of the first PSDU is less than or equal to the second length.

14. The method according to claim 13, characterized in that, The second length is determined based on one or more of the following: The maximum duration of the first PPDU; The modulation method of the first PPDU; The bit rate of the first PPDU; The bandwidth of the first PPDU; Spatial flow rate of the first PPDU; The duration of the protection interval GI of the first PPDU; The duration of the packet extension PE field in the first PPDU.

15. The method according to claim 13 or 14, characterized in that, The second length is 2242 or 3070 bytes.

16. The method according to any one of claims 13-15, characterized in that, The second length is indicated by the PLME-CHARACTERISTICS.confirm primitive parameter.

17. The method according to any one of claims 12-16, characterized in that, The first condition includes: The total duration of the fields preceding the ELR-STF field in the first PPDU is less than or equal to the second time.

18. The method according to claim 17, characterized in that, The second time is 40 microseconds.

19. The method according to claim 17 or 18, characterized in that, The second time is indicated by the RxPHYStartDelay parameter.

20. The method according to any one of claims 1-19, characterized in that, The first SIG field is the ELR-SIG field.

21. A wireless communication method, characterized in that, include: The second device receives the first physical layer protocol data unit (PPDU) sent by the first device. The first PPDU supports enhanced long-range ELR, and the first PPDU satisfies a first condition, which is related to one or more of the following: the value of the length field in the first signal SIG field of the first PPDU; and the maximum duration of the first PPDU.

22. The method according to claim 21, characterized in that, The first condition includes one or more of the following: The value of the length field is less than or equal to the first length; The number of signs in the data field corresponding to the value indicated by the length field is less than or equal to the first number of signs.

23. The method according to claim 22, characterized in that, The first length is 373; and / or The value of the first symbol number is 374.

24. The method according to claim 22, characterized in that, The first length is 372; and / or The value of the first symbol number is 373.

25. The method according to claim 22, characterized in that, In the first frequency band, the first length is 373, and / or, the first symbol number is 374; and / or, In the second frequency band, the first length is 372, and / or the first symbol number is 373.

26. The method according to claim 25, characterized in that, The first frequency band includes the 5GHz and / or 6GHz bands.

27. The method according to claim 25 or 26, characterized in that, The second frequency band includes the 2.4 GHz band.

28. The method according to claim 21, characterized in that, The first condition includes: The maximum duration of the first PPDU is less than or equal to the first duration.

29. The method according to claim 28, characterized in that, The first duration is determined based on the maximum value of the length field in the first SIG field.

30. The method according to claim 28 or 29, characterized in that, The first duration is 7.4696ms.

31. The method according to any one of claims 28-30, characterized in that, The first duration is indicated by the PLME-CHARACTERISTICS.confirm primitive parameter.

32. The method according to any one of claims 21-31, characterized in that, The first condition is also related to one or more of the following: The maximum length of the first physical layer service data unit (PSDU) corresponding to the first PPDU; The total duration of the field preceding the ELR-STF field in the first PPDU, which enhances the long-distance short training field.

33. The method according to claim 32, characterized in that, The first condition includes: The maximum length of the first PSDU is less than or equal to the second length.

34. The method according to claim 33, characterized in that, The second length is determined based on one or more of the following: The maximum duration of the first PPDU; The modulation method of the first PPDU; The bit rate of the first PPDU; The bandwidth of the first PPDU; Spatial flow rate of the first PPDU; The duration of the protection interval GI of the first PPDU; The duration of the packet extension PE field in the first PPDU.

35. The method according to claim 33 or 34, characterized in that, The second length is 2242 or 3070 bytes.

36. The method according to any one of claims 33-35, characterized in that, The second length is indicated by the PLME-CHARACTERISTICS.confirm primitive parameter.

37. The method according to any one of claims 32-36, characterized in that, The first condition includes: The total duration of the fields preceding the ELR-STF field in the first PPDU is less than or equal to the second time.

38. The method according to claim 37, characterized in that, The second time is 40 microseconds.

39. The method according to claim 37 or 38, characterized in that, The second time is indicated by the RxPHYStartDelay parameter.

40. The method according to any one of claims 21-39, characterized in that, The first SIG field is the ELR-SIG field.

41. A communication device, characterized in that, The communication device is a first device, and the communication device includes: The transmitting unit is used to transmit the first physical layer protocol data unit (PPDU). The first PPDU supports enhanced long-range ELR, and the first PPDU satisfies a first condition, which is related to one or more of the following: the value of the length field in the first signal SIG field of the first PPDU; and the maximum duration of the first PPDU.

42. The communication device according to claim 41, characterized in that, The first condition includes one or more of the following: The value of the length field is less than or equal to the first length; The number of signs in the data field corresponding to the value indicated by the length field is less than or equal to the first number of signs.

43. The communication device according to claim 42, characterized in that, The first length is 373; and / or The value of the first symbol number is 374.

44. The communication device according to claim 42, characterized in that, The first length is 372; and / or The value of the first symbol number is 373.

45. The communication device according to claim 42, characterized in that, In the first frequency band, the first length is 373, and / or, the first symbol number is 374; and / or, In the second frequency band, the first length is 372, and / or the first symbol number is 373.

46. ​​The communication device according to claim 45, characterized in that, The first frequency band includes the 5GHz and / or 6GHz bands.

47. The communication device according to claim 45 or 46, characterized in that, The second frequency band includes the 2.4 GHz band.

48. The communication device according to claim 41, characterized in that, The first condition includes: The maximum duration of the first PPDU is less than or equal to the first duration.

49. The communication device according to claim 48, characterized in that, The first duration is determined based on the maximum value of the length field in the first SIG field.

50. The communication device according to claim 48 or 49, characterized in that, The first duration is 7.4696ms.

51. The communication device according to any one of claims 48-50, characterized in that, The first duration is indicated by the PLME-CHARACTERISTICS.confirm primitive parameter.

52. The communication device according to any one of claims 41-51, characterized in that, The first condition is also related to one or more of the following: The maximum length of the first physical layer service data unit (PSDU) corresponding to the first PPDU; The total duration of the field preceding the ELR-STF field in the first PPDU, which enhances the long-distance short training field.

53. The communication device according to claim 52, characterized in that, The first condition includes: The maximum length of the first PSDU is less than or equal to the second length.

54. The communication device according to claim 53, characterized in that, The second length is determined based on one or more of the following: The maximum duration of the first PPDU; The modulation method of the first PPDU; The bit rate of the first PPDU; The bandwidth of the first PPDU; Spatial flow rate of the first PPDU; The duration of the protection interval GI of the first PPDU; The duration of the packet extension PE field in the first PPDU.

55. The communication device according to claim 53 or 54, characterized in that, The second length is 2242 or 3070 bytes.

56. The communication device according to any one of claims 53-55, characterized in that, The second length is indicated by the PLME-CHARACTERISTICS.confirm primitive parameter.

57. The communication device according to any one of claims 52-56, characterized in that, The first condition includes: The total duration of the fields preceding the ELR-STF field in the first PPDU is less than or equal to the second time.

58. The communication device according to claim 57, characterized in that, The second time is 40 microseconds.

59. The communication device according to claim 57 or 58, characterized in that, The second time is indicated by the RxPHYStartDelay parameter.

60. The communication device according to any one of claims 41-59, characterized in that, The first SIG field is the ELR-SIG field.

61. A communication device, characterized in that, The communication device is a second device, and the communication device includes: The receiving unit is used to receive the first physical layer protocol data unit (PPDU) sent by the first device. The first PPDU supports enhanced long-range ELR, and the first PPDU satisfies a first condition, which is related to one or more of the following: the value of the length field in the first signal SIG field of the first PPDU; and the maximum duration of the first PPDU.

62. The communication device according to claim 61, characterized in that, The first condition includes one or more of the following: The value of the length field is less than or equal to the first length; The number of signs in the data field corresponding to the value indicated by the length field is less than or equal to the first number of signs.

63. The communication device according to claim 62, characterized in that, The first length is 373; and / or The value of the first symbol number is 374.

64. The communication device according to claim 62, characterized in that, The first length is 372; and / or The value of the first symbol number is 373.

65. The communication device according to claim 62, characterized in that, In the first frequency band, the first length is 373, and / or, the first symbol number is 374; and / or, In the second frequency band, the first length is 372, and / or the first symbol number is 373.

66. The communication device according to claim 65, characterized in that, The first frequency band includes the 5GHz and / or 6GHz bands.

67. The communication device according to claim 65 or 66, characterized in that, The second frequency band includes the 2.4 GHz band.

68. The communication device according to claim 61, characterized in that, The first condition includes: The maximum duration of the first PPDU is less than or equal to the first duration.

69. The communication device according to claim 68, characterized in that, The first duration is determined based on the maximum value of the length field in the first SIG field.

70. The communication device according to claim 68 or 69, characterized in that, The first duration is 7.4696ms.

71. The communication device according to any one of claims 68-70, characterized in that, The first duration is indicated by the PLME-CHARACTERISTICS.confirm primitive parameter.

72. The communication device according to any one of claims 61-71, characterized in that, The first condition is also related to one or more of the following: The maximum length of the first physical layer service data unit (PSDU) corresponding to the first PPDU; The total duration of the field preceding the ELR-STF field in the first PPDU, which enhances the long-distance short training field.

73. The communication device according to claim 72, characterized in that, The first condition includes: The maximum length of the first PSDU is less than or equal to the second length.

74. The communication device according to claim 73, characterized in that, The second length is determined based on one or more of the following: The maximum duration of the first PPDU; The modulation method of the first PPDU; The bit rate of the first PPDU; The bandwidth of the first PPDU; Spatial flow rate of the first PPDU; The duration of the protection interval GI of the first PPDU; The duration of the packet extension PE field in the first PPDU.

75. The communication device according to claim 73 or 74, characterized in that, The second length is 2242 or 3070 bytes.

76. The communication device according to any one of claims 73-75, characterized in that, The second length is indicated by the PLME-CHARACTERISTICS.confirm primitive parameter.

77. The communication device according to any one of claims 72-76, characterized in that, The first condition includes: The total duration of the fields preceding the ELR-STF field in the first PPDU is less than or equal to the second time.

78. The communication device according to claim 77, characterized in that, The second time is 40 microseconds.

79. The communication device according to claim 77 or 78, characterized in that, The second time is indicated by the RxPHYStartDelay parameter.

80. The communication device according to any one of claims 61-79, characterized in that, The first SIG field is the ELR-SIG field.

81. A communication device, characterized in that, The device includes a transceiver, a memory, and a processor. The memory stores a program, and the processor invokes the program in the memory and controls the transceiver to receive or transmit signals so that the communication device performs the method as described in any one of claims 1-40.

82. An apparatus, characterized in that, Includes a processor for calling a program from memory to cause the device to perform the method as described in any one of claims 1-40.

83. A chip, characterized in that, Includes a processor for calling a program from memory, causing a device on which the chip is mounted to perform the method as described in any one of claims 1-40.

84. A computer-readable storage medium, characterized in that, It contains a program that causes a computer to perform the method as described in any one of claims 1-40.

85. A computer program product, characterized in that, Includes a program that causes a computer to perform the method as described in any one of claims 1-40.

86. A computer program, characterized in that, The computer program causes the computer to perform the method as described in any one of claims 1-40.

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