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 to a second device, wherein the first PPDU comprises a first signal and a second PPDU, and the first signal is earlier than the second PPDU. By sending a first PPDU, a first device can send a first signal before sending a complete PPDU (i.e., a second PPDU). When other devices also send signals, the first signal can overlap with the signals sent by the other devices, such that the second PPDU does not overlap with the signals sent by the other devices, thereby preventing overlapping interference in the transmission of the second PPDU, such that the second PPDU can be successfully transmitted.

Description

Wireless communication method and communication device TECHNICAL FIELD

[0001] The present application relates to the technical field of communication, and more particularly, to a wireless communication method and a communication device. BACKGROUND

[0002] In a case where multiple communication devices all need to communicate, the multiple communication devices can simultaneously send respective physical layer protocol data units (PPDUs), thereby causing overlap interference between the PPDUs. For example, in some communication systems, a communication device needs to perform channel contention, and only when the channel contention succeeds can the communication device send a signal. During the channel contention, multiple communication devices can simultaneously send PPDUs for contending for a channel, thereby causing channel contention conflict. The channel resource contention conflict can cause multiple communication devices to all fail to successfully contend for the channel, thereby causing waste of channel resources.

[0003] SUMMARY

[0004] The present application provides a wireless communication method and a communication device. Each aspect involved in the present application is described below.

[0005] In a first aspect, a wireless communication method is provided. The method comprises: a first device sending a first PPDU to a second device; wherein the first PPDU comprises a first signal and a second PPDU, and the first signal is earlier than the second PPDU.

[0006] In a second aspect, a wireless communication method is provided. The method comprises: a second device receiving a first PPDU sent by a first device; wherein the first PPDU comprises a first signal and a second PPDU, and the first signal is earlier than the second PPDU.

[0007] In a third aspect, a communication device is provided. The communication device is a first device, and the communication device comprises: a sending unit configured to send a first PPDU to a second device; wherein the first PPDU comprises a first signal and a second PPDU, and the first signal is earlier than the second PPDU.

[0008] In a fourth aspect, a communication device is provided. The communication device is a second device, and the communication device comprises: a receiving unit configured to receive a first PPDU sent by a first device; wherein the first PPDU comprises a first signal and a second PPDU, and the first signal is earlier than the second PPDU.

[0009] In a fifth aspect, a communication device is provided, which includes a processor and a memory. The memory is configured to store one or more computer programs. The processor is configured to invoke the computer programs in the memory to cause the communication device to perform some or all of the steps in the methods of the various aspects described above.

[0010] In a sixth aspect, a communication system is provided, which includes the communication device described above. In another possible design, the system can further include other devices interacting with the communication device in the solutions provided by the embodiments.

[0011] In a seventh aspect, a computer-readable storage medium is provided, which stores a computer program. The computer program causes a communication device to perform some or all of the steps in the methods of the various aspects described above.

[0012] In an eighth aspect, a computer program product is provided, which includes a non-transitory computer-readable storage medium storing a computer program. The computer program is operable to cause a communication device to perform some or all of the steps in the methods of the various aspects described above. In some implementations, the computer program product can be a software installation package.

[0013] In a ninth aspect, a chip is provided, which includes a memory and a processor. The processor can invoke and run a computer program from the memory to implement some or all of the steps described in the methods of the various aspects described above.

[0014] By sending the first PPDU, the first device can send the first signal before sending a complete PPDU (i.e., the second PPDU). In the case that other devices also send signals, the first signal can overlap with the signals sent by the other devices, so that the second PPDU does not overlap with the signals sent by the other devices, thereby avoiding overlapping interference in the transmission of the second PPDU, so that the second PPDU can be successfully transmitted. BRIEF DESCRIPTION OF DRAWINGS

[0015] FIG. 1 is a schematic diagram of a wireless communication system to which embodiments of the present application are applied.

[0016] FIG. 2 is an example diagram of a value of a contention window (CW).

[0017] FIG. 3 is an example of an operation process of a broadcast target wake time (TWT) mechanism.

[0018] FIG. 4 is an example diagram of a channel contention priority access process based on a postponing signal.

[0019] FIG. 5 is an example diagram of a channel collision resolution procedure based on a distributed resource unit (dRU).

[0020] FIG. 6A is an example diagram of a channel collision resolution procedure based on a station identification field.

[0021] FIG. 6B is an example diagram of another channel collision resolution procedure based on a station identification field.

[0022] FIG. 7A illustrates a channel contention collision that can occur in a channel contention mechanism of a distributed coordination function (DCF) or enhanced distributed channel access (EDCA).

[0023] FIG. 7B illustrates a channel contention collision that can occur in two channel resource reservation mechanisms of a TWT service period (SP) and a restricted-TWT (R-TWT) SP.

[0024] FIG. 7C illustrates overlapping interference that can occur from PPDU transmissions that send a defer signal.

[0025] FIG. 7D illustrates overlapping interference that can occur from dRU-based PPDU transmissions.

[0026] FIG. 7E illustrates overlapping interference that can occur from PPDU transmissions that contain a user identifying extension (UIE) field.

[0027] FIG. 7F illustrates overlapping interference that can occur from PPDU transmissions that contain a UIE field and a transceiver state switch field.

[0028] FIG. 8 is a schematic flow chart of a wireless communication method according to an embodiment of the present application.

[0029] FIGS. 9A-9D are schematic structural diagrams of a first PPDU according to embodiments of the present application.

[0030] FIG. 10 is an example diagram of a wireless communication procedure according to Embodiment 1.

[0031] FIG. 11 is an example diagram of a wireless communication procedure according to Embodiment 2.

[0032] FIG. 12 is an example diagram of a wireless communication procedure according to Embodiment 3.

[0033] FIG. 13 is an example diagram of a wireless communication process provided by embodiment 4.

[0034] FIG. 14A is an example diagram of a wireless communication process provided by embodiment 5.

[0035] FIG. 14B is an example diagram of another wireless communication process provided by embodiment 5.

[0036] FIG. 14C is an example diagram of a wireless communication process provided by embodiment 6.

[0037] FIG. 15A shows an example of interaction of first information and second information based on a management frame.

[0038] FIG. 15B shows another example of interaction of first information and second information based on a management frame.

[0039] FIG. 15C shows another example of interaction of first information and second information based on a management frame.

[0040] FIG. 15D shows an example of interaction of first information and second information based on a control frame.

[0041] FIG. 16 is a format diagram of a first element provided by embodiments of the present application.

[0042] FIG. 17A is a format diagram of an extremely high throughput (EHT) variant of a report poll trigger provided by embodiments of the present application.

[0043] FIG. 17B is a format diagram of a high-efficiency (HE) variant of a report poll trigger provided by embodiments of the present application.

[0044] FIG. 18 is a format diagram of an aggregation control (A-control) field carrying two pieces of information provided by embodiments of the present application.

[0045] FIG. 19A and FIG. 19B are respectively a schematic structural diagram of a first PPDU provided by embodiments of the present application.

[0046] FIG. 20 is a schematic structural diagram of a communication device provided by embodiments of the present application.

[0047] FIG. 21 is a schematic structural diagram of a communication device provided by embodiments of the present application.

[0048] FIG. 22 is a schematic structural diagram of an apparatus for communication provided by embodiments of the present application. DETAILED DESCRIPTION

[0049] The technical solutions in the present application will be described below with reference to the drawings.

[0050] Communication system

[0051] The technical solutions of the embodiments of the present application can be applied to various communication systems, for example, a wireless local area network (WLAN), a wireless fidelity (WiFi), a high performance radio local area network (HIPELAN), a wide area network (WAN), a cellular network or other communication systems, and the like. For example, the technical solutions provided by the embodiments of the present application can be applied to a communication system using an 802.11 standard. Exemplarily, the 802.11 standard includes but is not limited to an 802.11ax standard, an 802.11be standard, a more next generation 802.11 standard, and the like.

[0052] FIG. 1 shows a schematic diagram of a communication system to which the embodiments of the present application are applicable. Referring to FIG. 1, the communication devices in the communication system 100 can include an access point (AP) 111, an AP 112, and a station (STA) 121 and a STA 122, wherein the STA 121 can access a network through the AP 111, and the STA 122 can access a network through the AP 112.

[0053] In some implementations, a STA can establish an association relationship with one or more APs, and then the STA and the APs having the association relationship can communicate with each other. Referring to FIG. 1, the AP 111 and the STA 121 can communicate with each other after establishing an association relationship, and the AP 112 and the STA 122 can communicate with each other after establishing an association relationship.

[0054] In some implementations, the communication in the communication system 100 can be communication between an AP and a non-AP STA, communication between non-AP STAs, or communication between a STA and a peer STA, wherein the peer STA can refer to a device communicating with the STA, for example, the peer STA can be an AP or a non-AP STA.

[0055] It should be understood that FIG. 1 exemplarily shows two AP STAs and two non-AP STAs, the communication system 100 can also include a larger number of AP STAs, or the communication system 100 can include other numbers of non-AP STAs, and embodiments of the present application do not limit this.

[0056] In addition, the above communication system can be applied to a multi-device cooperation scenario, such as a multi-AP (multiple access points, multi-AP) cooperation scenario, or a multi-site cooperation scenario.

[0057] In embodiments of the present application, the names of APs and / or STAs are not limited. In some scenarios, an AP can also be referred to as an AP STA, that is, in a certain sense, an AP is also a kind of STA. In other scenarios, a STA can also be referred to as a non-AP STA (non-AP STA).

[0058] In some scenarios, the above communication device can also be a multi-link device (multi-link device, MLD), that is, a device that can communicate through multiple communication links, where the multiple communication links can include communication links of different frequency bands, for example, can include millimeter wave frequency bands and / or low frequency frequency bands. Generally, if the multi-link device is an AP, the AP can also be referred to as a multi-link AP. If the multi-link device is a STA, the STA can also be referred to as a multi-link STA.

[0059] In embodiments of the present application, the AP can be a device in a wireless network. The AP can be a communication server, a router, a switch, a bridge, or the like, or the AP can include various forms of macro base stations, micro base stations, relay stations, etc., and of course the AP can also be a chip or circuit or processing system in these various forms of devices, thereby implementing the methods and functions of embodiments of the present application. The AP can be applied to various scenarios, such as sensor nodes in smart cities (such as smart water meters, smart electricity meters, smart air detection nodes), smart devices in smart homes (such as smart cameras, projectors, display screens, televisions, sound systems, refrigerators, washing machines, etc.), nodes in the Internet of Things, entertainment terminals (such as AR, VR, etc. wearable devices), smart devices in smart offices (such as printers, projectors, etc.), Internet of Vehicles devices in the Internet of Vehicles, some infrastructure in daily life scenarios (such as vending machines, self-service navigation stations in supermarkets, self-service checkout devices, self-service ordering machines), etc.

[0060] In some implementations, the role of a STA in a communication system is not absolute, and in some scenarios, a STA can act as an AP. For example, in a scenario where a phone connects to a router, the phone can be a non-AP STA, while in a scenario where the phone acts as a hotspot for other phones, the phone acts as an AP.

[0061] In the embodiments of the present application, the STA in the embodiments of the present application can be a device with wireless transceiving function, for example, can support 802.11 series protocols, and can communicate with an AP or other STAs. For example, the STA is any user communication device that allows a user to communicate with an AP and then communicate with a WLAN. The STA is, for example, a user equipment (UE), a mobile station (MS), a mobile terminal (MT), an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile terminal, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user equipment, etc.

[0062] The STA in the embodiments of the present application can also be a device providing voice / data connectivity to a user, for example, a handheld device with wireless connection function, a vehicle-mounted device, etc. For example, a mobile phone, a tablet computer, a notebook computer, a palm computer, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self driving, a wireless terminal in remote medical surgery, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a 5G network, or a terminal device in a future evolved public land mobile network (PLMN), etc. The embodiments of the present application are not limited thereto.

[0063] By way of example and not limitation, in the embodiments of the present application, the STA can also be a wearable device. The wearable device can also be referred to as a wearable smart device, which is a general term for devices that are designed and developed by applying wearable technology to daily wear, such as glasses, gloves, watches, clothing, and shoes. For example, a smart watch or smart glasses, etc., and only focus on a certain type of application function, need to be used with other devices such as a smart phone, such as various types of smart wristbands, smart jewelry, etc.

[0064] In addition, in the embodiments of the present application, the STA can also be a terminal device in an internet of things (IoT) system. The IoT is an important part of future information technology development, and its main technical feature is to connect objects through communication technology and network, so as to realize the intelligent network of man-machine interconnection and object-object interconnection. In the embodiments of the present application, the IoT technology can achieve massive connection, deep coverage and terminal power saving through, for example, narrow band (NB) technology.

[0065] In addition, in the embodiments of the present application, the STA can be a device in a vehicle-to-everything (V2X) system. The communication mode in the V2X system is collectively referred to as V2X (X represents anything). For example, the 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.

[0066] In addition, in the embodiments of the present application, the STA can also include a smart printer, a train detector, a gas station sensor, and the like, and the main functions include collecting data (part of the terminal device), receiving control information and downlink data of the AP, and transmitting electromagnetic waves to transmit data to the AP.

[0067] In addition, the AP in the embodiments of the present application 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 for communicating with the STA through the wireless local area network.

[0068] From the perspective of the communication mode supported by the AP, in some implementation manners, the AP can be a device supporting the 802.11be mode. The AP can also be a device supporting multiple current and future WLAN modes of the 802.11 family, such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b and 802.11a.

[0069] From the perspective of the communication mode supported by the STA, in some implementation manners, the non-AP STA can support the 802.11be mode. The non-AP STA can also support multiple current and future WLAN modes of the 802.11 family, such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b and 802.11a.

[0070] In the embodiments of the present application, the frequency bands supported by the WLAN technology are not limited. In some implementations, the frequency bands supported by the WLAN technology can include, but are not limited to, low frequency bands (such as 2.4 GHz, 5 GHz, 6 GHz), high frequency bands (such as 45 GHz, 60 GHz).

[0071] It should be understood that the specific forms of the STA and the AP in the embodiments of the present application are not specially limited, and are only exemplary described herein.

[0072] EDCA / DCF channel contention mechanism

[0073] If a STA intends to initiate a data frame and / or management frame transmission using DCF, the STA can invoke a carrier sense (CS) mechanism to determine the busy / idle state of the medium. If the medium is busy, the STA should defer transmission until the medium is determined to be idle without interruption for a period of time. The length of the period of time can satisfy: if the last transition to an idle medium is due to the detection of an incorrectly received frame on the medium, the period of time can be equal to an extended inter-frame space (EIFS), otherwise the period of time can be equal to a distributed inter-frame spacing (DIFS). After the DIFS or EIFS medium idle time, the STA should generate a random number before transmission, which is a backoff count. The backoff count can be used to determine an additional delay time. If the backoff counter already contains a non-zero value, the random number selection is not required and will not be performed. This process minimizes the conflicts during contention between multiple STAs performing the same event.

[0074] Optionally, the backoff count can satisfy: Backoff Count = Random(). Wherein, Random() can be used to obtain a pseudo-random integer from an average distribution distributed in the interval [0, CW]. The parameter CW can represent the size of the contention window. CW can be an integer between the physical layer (PHY) parameters aCWmin and aCWmax, aCWmin≤ CW≤ aCWmax.

[0075] It can be seen that when the random backoff count generated by two or more STAs is the same, these stations will simultaneously send signals to the medium at the backoff count equal to zero to attempt to occupy the channel, thereby causing a channel contention collision. Since the signals sent by different stations interfere with each other, none of the stations will obtain the channel, which is a waste of medium resources.

[0076] The initial value of the parameter CW can be aCWmin. Each STA can maintain a STA short retry count (SSRC) and a STA long retry count (SLRC). The initial value of the SSRC and the SLRC can both be 0. The SSRC will increase when any short retry count (SRC) associated with a media access control protocol data unit (MPDU) of type data or management increases. The SLRC will increase when any long retry count (LRC) associated with an MPDU of type data or management increases. Each time the STA retry count increases as a result of a failed attempt to transmit an MPDU, the CW will take the next value in the CW sequence until the CW reaches the value of aCWmax. Once the value of the CW reaches aCWmax, the CW will remain at the value of aCWmax until the CW is reset. This technical solution improves the stability of the access protocol under high load conditions.

[0077] FIG. 2 illustrates the change in the value of the CW in the CW sequence with exponential growth of the CW value. The exponential growth of the CW value can refer to the setting of the CW value in the order of 2 raised to the power of an integer, then subtracting 1, and starting from a specific PHY aCWmin value to a specific PHY aCWmax value.

[0078] As shown in FIG. 2, in an initial attempt, the value of CW can be equal to CWmin (i.e., the value of parameter aCWmin). In FIG. 2, CWmin is 7. In a first retransmission, the value of CW can increase to 15. In a second retransmission, the value of CW can increase to 31. In a third retransmission, the value of CW can continue to increase to 63. In subsequent retransmissions, if the value of CW increases to CWmax (i.e., the value of parameter aCWmax), the value of CW needs to remain at CWmax. In FIG. 2, CWmax is 255.

[0079] After each successful attempt by the STA to transmit data or management frames, or when the SSRC reaches the value of parameter dot11shorttretrylimit, the CW is reset to aCWmin.

[0080] The SSRC shall be reset to 0 when one or more of the following conditions are met: the STA receives a CTS frame in response to an RTS frame; the STA receives a Block Ack (BA) frame in response to a Block Ack Request (BlockAckReq) frame; the STA receives a PSDU containing all or part of an MSDU or MMPDU and the length is less than or equal to parameter dot11RTSThreshold; the STA transmits a frame carrying a group address in the Address 1 field.

[0081] The SLRC shall be reset to 0 when the STA receives an acknowledgment (Ack) frame in response to a frame containing all or part of an MSDU or MMPDU, and the frame is contained in a PSDU with a length greater than parameter dot11RTSThreshold, when the STA transmits a frame carrying a group address in the Address 1 field.

[0082] TWT SP or R-TWT SP channel resource reservation mechanism

[0083] TWT technology allows an AP to manage the activities in a BSS to minimize contention among STAs and to reduce the required time for a STA using power save mode to wake up. TWT proposes that a STA wakes up to interact with the AP in frames only during predefined service periods (SPs) and continues to sleep after the end of the SP.

[0084] A STA operating according to a TWT SP or R-TWT SP received can be referred to as a scheduled STA, and an AP configuring a TWT SP or R-TWT SP for a scheduled STA can be referred to as a scheduling AP.

[0085] TWT techniques can enable STAs to be assigned to operate on non-overlapping times and / or frequencies and to concentrate frame exchange sequences within a predefined service period. Details can be found in the 802.11ax standard.

[0086] R-TWT operation related techniques can enable STAs in a BSS to deliver latency sensitive traffic using enhanced medium access protection and resource reservation mechanisms. Details can be found in the 802.11be standard.

[0087] FIG. 3 is an example of an operation procedure of a broadcast TWT mechanism.

[0088] In FIG. 3, the AP and STA1 can interact with TWT request (TWT req.) frames and TWT response (TWT resp.) frames to perform optional TBTT negotiation. The optional TBTT negotiation can be used to negotiate a first TBTT, a listen interval, etc. The AP includes a broadcast TWT information element (IE) in a beacon frame. The broadcast TWT IE can be used to indicate a B-TWT SP. During the B-TWT SP, the AP intends to transmit trigger frames or downlink data to STAs. During the B-TWT SP, STA1 and STA2 wake up from a doze state to receive the beacon frame of the AP to determine the B-TWT SP. During a trigger-enabled TWT SP, the AP transmits a basic trigger frame. STA1 and STA2 receive the basic trigger frame, which indicates that STA1 and STA2 need to be awake during the TWT SP. STA1 indicates that it is in an awake state by transmitting a power save poll (PS-Poll), and STA2 indicates that it is in an awake state by transmitting a quality of service (QoS) null frame. STA1 and STA2 receive downlink data of the AP in a subsequent interaction with the AP and enter a doze state after the TWT SP ends.

[0089] Channel contention priority access mechanism based on deferral signal

[0090] In the channel contention priority access mechanism based on deferral signal, an ultra-high reliability (UHR) station can send a deferral signal when the channel is idle for DIFS, so as to prevent non-UHR stations from obtaining the channel, thereby ensuring the priority of the UHR station to access the channel. Further, the UHR station can perform secondary channel contention after sending the deferral signal. In the secondary channel contention, the UHR station that finally wins can obtain the channel.

[0091] FIG. 4 is an example diagram of a channel contention priority access process based on a deferral signal. In FIG. 4, STA1 and STA2 are both non-UHR stations, and STA3 and STA4 are both UHR stations.

[0092] As shown in FIG. 4, after a previous TXOP from STA1, in an EDCA contention period, STA3 and STA4 both send a deferral signal, so as to prevent STA1 and STA2 from obtaining the channel. The deferral signal may, for example, include a short training field (STF) / long training field (LTF) / signal (SIG), etc. After sending the deferral signal, STA3 and STA4 detect whether the channel is busy within a BO. For STA3 and STA4, the BO is a random number rand(0, 7) between 0 and 7. The BO of STA3 is 4, and the BO of STA4 is 5. STA3 detects that the channel is idle within the BO, so the secondary channel contention is successful, and TXOP is obtained and PPDU transmission is performed. Since STA3 performs PPDU transmission, STA4 detects that the channel is busy within the BO, so the secondary channel contention of STA4 fails.

[0093] Channel conflict resolution mechanism based on dRU

[0094] Based on dRU, the resolution of channel contention conflict can be achieved.

[0095] Exemplarily, different UHR STAs can use dRU PPDU with different subcarrier groups to contend for the channel, so that the different UHR stations do not overlap in subcarrier frequency, thereby avoiding conflict.

[0096] As shown in FIG. 5, PPDU1 and PPDU2 use different dRUs with different subcarriers to contend for the channel. STA1 and STA2 both successfully contend for the channel. AP1 can determine data transmission with STA2 and STA3 according to the first rule, PPDU1 and PPDU2.

[0097] Channel collision resolution mechanism based on station identification field

[0098] Different STAs can send station identification fields through different subcarrier groups, so that the station identification fields of different STAs do not overlap in subcarrier frequency, and the AP can receive the station identification fields sent by these STAs at the same time, thereby avoiding collision.

[0099] The station identification field can be used to indicate the identification of the station sending the field. For example, the value of the station identification field can be the starting association identifier (AID) of the station sending the field.

[0100] The station identification field can also be referred to as a UIE field.

[0101] The station identification field can be located at the end of the UHR PPDU. The UHR PPDU can carry an S-RTS frame.

[0102] The AP can schedule multiple STAs according to the received station identification fields, thereby realizing data interaction between multiple STAs and the AP.

[0103] The following is described in conjunction with FIG. 6A.

[0104] In FIG. 6A, STA1 and STA2 can send PPDU through different subcarrier groups. The PPDU sent by STA1 can include a UIE-1 field. The UIE-1 field can indicate the identification of STA1. The PPDU sent by STA2 can include a UIE-2 field. The UIE-2 field can indicate the identification of STA2. After receiving the UEI-1 field and the UEI-2 field, the AP sends a CTS frame to STA1, so that STA1 sends single user (SU) uplink (UL) data. After the TXOP of STA1 ends, STA2 sends a PPDU containing the UIE-2 field to the AP again. After receiving the UEI-2 field, the AP sends a CTS frame to STA2, so that STA2 sends SU UL data.

[0105] Optionally, the station identification field can be preceded by a transceiving state switching field. Based on the transceiving state switching field received, the station can transition from a receiving state to a transmitting state and immediately transmit a UIE field indicating its own identity within the time range of the received UIE field.

[0106] It should be noted that the transceiving state switching field can also be referred to as an RI field.

[0107] The following will be described in conjunction with FIG. 6B.

[0108] In FIG. 6B, STA1 transmits a PPDU including an RI and a UIE-1 field. The UIE-1 field can indicate the identity of STA1. After STA2 detects the PPDU, it transitions from a receiving state to a transmitting state within the transceiving state switching field and transmits a UIE-2 field within the time range of the UIE-1 field. The UIE-2 field can indicate the identity of STA2. After the AP receives the UEI-1 field and the UEI-2 field, it transmits a CTS frame to STA1 so that STA1 transmits SU UL data. After the TXOP of STA1 ends, STA2 transmits a PPDU including a transceiving state switching field and a UIE-2 field to the AP. After the AP receives the UEI-2 field, it transmits a CTS frame to STA2 so that STA2 transmits SU UL data.

[0109] The above-described techniques can solve overlapping interference or channel contention conflicts to some extent, but there are still some problems. The following will be described with respect to FIGS. 7A to 7E.

[0110] FIG. 7A illustrates a channel contention conflict that can occur in a channel contention mechanism of DCF or EDCA.

[0111] As shown in FIG. 7A, when the backoff counts of STA1, STA2, and STA3 are all 0, STA1, STA2, and STA3 can simultaneously transmit PPDUs to the AP, resulting in a channel contention conflict. Alternatively, when the backoff counts of STA1 and STA2 are both 0, STA1 and STA2 can simultaneously transmit PPDUs to the AP, resulting in a channel contention conflict.

[0112] FIG. 7B illustrates a channel contention conflict that can occur in two channel resource reservation mechanisms of TWT SP and R-TWT SP.

[0113] Channel contention collision can still occur due to some stations not supporting the mechanism. As described above, both TWT SP and R-TWT SP channel resource reservation mechanisms are defined in 802.11ax and 802.11be standards, respectively. Therefore, for some stations (e.g., stations defined in standards before 802.11ax or 802.11be standards), it is still possible to contend for the channel during TWT SP or R-TWT SP, resulting in channel contention collision.

[0114] As shown in FIG. 7B, STA1 supports TWT SP or R-TWT SP mechanism, and STA2 and STA3 do not support TWT SP or R-TWT SP mechanism. During TWT SP or R-TWT SP, STA1 is a TWT scheduled STA, and thus can send a non-HT PPDU. The non-HT PPDU can include an RTS frame to contend for the channel. Since STA2 and STA3 do not support TWT SP or R-TWT SP mechanism, STA2 and STA3 also send normal PPDUs. The normal PPDUs can include RTS frames or data. As can be seen from FIG. 7B, the PPDUs sent by STA1, STA2 and STA3 result in channel contention collision.

[0115] Similarly, the PPDU containing the deferral signal can be interfered by normal PPDUs sent by other stations, resulting in invalidation of the deferral signal. Or, the dRU PPDU can be interfered by normal PPDUs sent by other stations, resulting in invalidation of the dRU PPDU. Or, the PPDU containing the UIE field can be interfered by normal PPDUs sent by other stations, resulting in invalidation of the UIE field.

[0116] As shown in FIG. 7C, the UHR PPDUs sent by STA1 and STA2 contain the deferral signal. STA3 simultaneously sends a normal PPDU, resulting in overlapping interference and invalidation of the deferral signal.

[0117] As shown in FIG. 7D, STA1 and STA2 both send dRU PPDUs. STA3 simultaneously sends a normal PPDU, resulting in overlapping interference and invalidation of the dRU PPDU.

[0118] As shown in FIG. 7E, STA1 and STA2 both send PPDUs containing the UIE field. STA3 simultaneously sends a normal PPDU, resulting in overlapping interference and invalidation of the UIE field.

[0119] As shown in FIG. 7F, STA1 and STA2 both transmit a PPDU containing an RI and a UIE field. STA3 transmits a normal PPDU at the same time, resulting in overlapping interference.

[0120] It should be noted that the normal PPDU can include one or more of the following: a PPDU transmitted by a STA that does not support the TWT SP or R-TWT SP mechanism; a PPDU that does not contain a deferral signal; a PPDU that does not contain a UIE field; and a PPDU that does not contain a UIE field and a transceiver state switching field. The present application does not limit the type of PPDU. For example, the normal PPDU can be a PPDU defined in the IEEE 802.11 standard.

[0121] FIG. 8 is a schematic flowchart of a wireless communication method provided by an embodiment of the present application to solve the problem of overlapping interference.

[0122] The method shown in FIG. 8 can be performed by a first device and a second device. The first device and the second device can both be the communication device described above.

[0123] For example, the first device can include a non-AP STA or a non-AP MLD. For another example, the second device can include a peer device of the first device. Illustratively, the second device can include an AP, an AP MLD, or a peer STA of the first device.

[0124] For example, the second device can include a non-AP STA or a non-AP MLD. For another example, the first device can include a peer device of the second device. Illustratively, the first device can include an AP, an AP MLD, or a peer STA of the second device.

[0125] The method shown in FIG. 8 can include step S810.

[0126] In step S810, the first device transmits a first PPDU to the second device.

[0127] The first PPDU can include a first signal and a second PPDU. The first signal can be earlier than the second PPDU. In other words, the first PPDU can be obtained by concatenating the first signal and the second PPDU in the time dimension.

[0128] Optionally, the first signal and the second PPDU can be directly connected. That is, the end time of the first signal can be the start time of the second PPDU. In other words, there can be no gap or interval between the first signal and the second PPDU.

[0129] FIG. 9A is a schematic structural diagram of a first PPDU provided by an embodiment of the present application. As shown in FIG. 9A, the first signal and the second PPDU are directly connected.

[0130] Optionally, a first interval can be included between the first signal and the second PPDU. That is, an ending time of the first signal can be earlier than a starting time of the second PPDU. In other words, a gap can exist between the first signal and the second PPDU.

[0131] FIG. 9B is a schematic structural diagram of another first PPDU provided by an embodiment of the present application. As shown in FIG. 9B, a first interval can be included between the first signal and the second PPDU.

[0132] In some embodiments, the first interval can not contain a waveform. That is, the first interval can be a blank time interval. In other words, between the first signal and the second PPDU, the first device can not send any waveform.

[0133] In some embodiments, the first interval can contain a waveform. The present application does not limit the waveform of the first interval. For example, the waveform of the first interval can be a random waveform or a fixed waveform.

[0134] It should be noted that a duration of the first interval can be less than or equal to a first threshold.

[0135] It should be noted that the duration of the first interval can be predefined or pre-negotiated.

[0136] It should be noted that the first interval can also be referred to as a guard interval.

[0137] It can be understood that by sending the first PPDU, the first device can send the first signal before sending a complete PPDU (i.e., the second PPDU). In the case where other devices also send signals, the first signal can overlap with the signals sent by the other devices, so that the second PPDU does not overlap with the signals sent by the other devices, thereby avoiding overlapping interference in the transmission of the second PPDU, so that the second PPDU can be successfully transmitted, and the efficiency of the use of the medium can also be provided.

[0138] As a fourth device different from the second device, if the first device starts to transmit the first PPDU and the fourth device also starts to transmit a PPDU, the PPDU transmitted by the fourth device will overlap with the first signal. After the fourth device receives the first signal, it considers the medium busy and will not continue to immediately transmit the PPDU, but waits until the medium is idle before transmitting the PPDU. Therefore, after the first signal completes transmission, the fourth device detects the transmission of the second PPDU and continues to consider the medium busy and will not transmit the PPDU. As can be seen, the transmission of the second PPDU is completed during the period when the fourth device cannot transmit the PPDU. Similarly to the fourth device, other devices will not transmit the PPDU. Therefore, during the transmission of the second PPDU, no other communication device will transmit the PPDU, so as to avoid overlapping interference of the second PPDU.

[0139] Optionally, the fourth device can be, for example, a non-UHR device. Alternatively, the fourth device can be a device that does not support one or more of the following mechanisms: dRU, TWT, defer signal, UIE field, etc.

[0140] It should be noted that the first signal can be any signal that can be received by the communication device. For example, the first signal can be an interference signal of the fourth device. Alternatively, the first signal can include any signal that causes the fourth device to consider the medium busy.

[0141] It should be noted that the present application does not limit the type of the second PPDU. For example, the second PPDU can be a PPDU type defined in the IEEE 802.11 standard. Exemplarily, the type of the second PPDU can include: a non-high-throughput (non-HT) PPDU, a non-HT duplicated PPDU, a high-throughput (HT) PPDU, a very high-throughput (VHT) PPDU, a high-efficiency (HE) PPDU, an enhancement for extremely high throughput (EHT) PPDU, a UHR PPDU, a directional multi-gigabit (DMG) PPDU, an enhanced directional multi-gigabit (EDMG) PPDU, a CDMG PPDU, a CMMG PPDU, a WUR PPDU, or a S1G PPDU.

[0142] In some embodiments, the first PPDU can include the third PPDU and the second PPDU. The third PPDU can be used to carry the first signal. Based on this technical solution, the first PPDU can be constituted by at least two complete PPDUs in series in the time dimension. Or, it can also be said that the first PPDU aggregates multiple PPDUs in the time domain. Therefore, the first PPDU can also be called an aggregated-physical layer protocol data unit (A-PPDU).

[0143] It should be noted that the present application does not limit the content carried by the third PPDU. For example, the third PPDU can carry any MAC frame type. Exemplarily, the third PPDU can carry one or more of the RTS frame, the data frame. Or, the third PPDU can carry random meaningless data.

[0144] FIGS. 9C and 9D are schematic diagrams of a format of a first PPDU provided by an embodiment of the present application, respectively. In FIG. 9C, the third PPDU is located before the second PPDU, and there is no interval between the third PPDU and the second PPDU. In FIG. 9D, there is a first interval between the third PPDU and the second PPDU.

[0145] It should be noted that the present application does not limit the type of the third PPDU. For example, the third PPDU can be a PPDU type defined in the IEEE 802.11 standard. Exemplarily, the type of the third PPDU can include: non-HT PPDU, non-HT Duplicated PPDU, HT PPDU, VHT PPDU, HE PPDU, EHT PPDU, UHR PPDU, DMG PPDU, EDMG PPDU, CDMG PPDU, CMMG PPDU, WUR PPDU, or S1G PPDU.

[0146] It should be noted that the role of the first signal is to create a sufficient time interval for the second PPDU. Therefore, the length of the third PPDU should generally be greater than the length of a normal PPDU.

[0147] In some embodiments, the length of the first signal can be dynamically adjusted, thereby avoiding the waste of time domain resources caused by the length of the first signal being too long, and also reducing the signaling overhead, or avoiding the second PPDU from receiving overlapping interference caused by the length of the first signal being too short. For example, the length of the first signal can be adjusted according to whether there is a fourth device in the current communication environment. For another example, the length of the first signal can be adjusted according to the real-time maximum length of a normal PPDU.

[0148] Optionally, the first device can find a duration of the first signal greater than a duration of a normal PPDU through multiple attempts under coordination of a second device (the second device can include an AP, for example). The first device can determine a duration of the third PPDU greater than a duration of a normal PPDU through multiple attempts under coordination of the second device.

[0149] In some embodiments, the duration of the first signal can be fixed. For example, the duration of the first signal can be pre-configured or pre-defined. This technical solution can simplify the duration of the first signal.

[0150] Optionally, the duration of the first signal can be greater than or equal to a duration of a signal transmitted by a first type of device. The first type of device can include a non-UHR station, for example. The duration of the first signal can be determined as a fixed value according to a maximum length of a PPDU transmitted by the non-UHR station, for another example. The duration of the first signal can be determined according to a maximum length of a PPDU transmitted by the non-UHR station in a period of time and dynamically adjusted in each period of time, for another example.

[0151] It should be noted that whether the first signal exists in the first PPDU can be dynamically adjusted. That is, whether the first signal exists before the second PPDU in the first PPDU can be dynamically selected. Alternatively, whether to use the time domain A-PPDU can be dynamically selected. Alternatively, whether the first device can transmit the first PPDU can be dynamically adjusted. For example, whether the first signal exists in the first PPDU can be determined according to whether the fourth device exists in the current communication environment. For another example, whether the first signal exists in the first PPDU can be determined according to whether the normal PPDU exists. Exemplarily, if there is no communication device of the fourth device type and no normal PPDU in the current environment, the PPDU transmitted by the first device can not include the first signal.

[0152] It should be noted that the lengths of the first signals sent by the plurality of STAs associated with the same AP can be the same, so that the plurality of second PPDUs sent by the plurality of STAs are aligned. For example, in the case where the second PPDUs include deferred signals, the lengths of the first signals sent by the plurality of STAs associated with the same AP being the same can make the transmission of the deferred signals aligned, so that the AP can correctly receive the plurality of deferred signals. For another example, in the case where the second PPDUs are transmitted through dRUs, the lengths of the first signals sent by the plurality of STAs associated with the same AP being the same can make the transmission of the second PPDUs aligned, so that the AP can correctly receive the plurality of second PPDUs through the dRUs. For another example, in the case where the second PPDUs include UIE fields (or include UIE and transceiving state switching fields), the lengths of the first signals sent by the plurality of STAs associated with the same AP being the same can make the transmission of the UIE fields aligned, so that the AP can correctly receive the plurality of UIE fields.

[0153] In some embodiments, the second PPDUs can be used for channel contention by the first device. The channel contention can include EDCA / DCF-based channel contention. For example, the second PPDUs can include RTS frames.

[0154] As described above, since the first PPDUs include the first signals, the second PPDUs will not be interfered by overlapping. Therefore, the channel contention based on the second PPDUs is less likely to have a channel contention conflict, so as to improve the success rate of channel contention by the first device.

[0155] Optionally, in the case where the first device needs to send low-latency traffic, the first device can send the first PPDUs and perform channel contention through the second PPDUs. Since the success rate of channel contention through the first PPDUs is higher, the first device can occupy the channel and transmit the low-latency traffic earlier, so as to provide priority access for the low-latency traffic station and meet the sending requirement of the low-latency traffic.

[0156] The use of the second PPDUs for channel contention by the first device will be described below through Embodiment 1.

[0157] Embodiment 1

[0158] FIG. 10 is an example diagram of a wireless communication process provided by Embodiment 1.

[0159] In FIG. 10, the first device can include STA1. The second device can include an AP. The fourth device can include STA2 and / or STA3.

[0160] STA1 needs to send low-latency traffic, and STA1 sends time-domain A-PPDUs. STA2 and STA3 send non-low-latency traffic, and both send normal PPDUs.

[0161] In the time domain, the third PPDU is of non-HT PPDU format and carries an RTS frame, and the second PPDU is of UHR PPDU and carries an RTS frame.

[0162] It should be noted that the type of the third PPDU (non-HT PPDU) and the type of the second PPDU (non-HT PPDU) in Embodiment 1 are only used as an example, and can be any PPDU type or any waveform defined in the IEEE 802.11 standard.

[0163] It should be noted that the RTS frame carried in the third PPDU and the second PPDU is also only used as an example, and can be any frame type or random data.

[0164] As can be seen from FIG. 10, STA1 transmits the third PPDU before the second PPDU, so that the second PPDU does not overlap with the normal PPDUs transmitted by STA2 and STA3, thereby avoiding the RTS frame in the second PPDU from being interfered by the normal PPDUs and being invalid. From the perspective of the AP, the AP will receive the signal in which the third PPDU transmitted by STA1 and the normal PPDUs transmitted by STA2 and STA3 are superimposed together, so that the AP cannot identify a valid PPDU. Subsequently, the AP will receive the second PPDU transmitted by STA1 in succession, and since there is no other signal on the channel at this time, the AP can successfully receive the valid second PPDU and parse the RTS frame carried in the second PPDU. Subsequently, the AP can reply a CTS frame to STA1 after a SIFS time according to the EDCA / DCF rule. Finally, STA1 successfully obtains the channel through the above process, and then transmits low-latency related services (not shown in FIG. 10).

[0165] In some embodiments, the first device can transmit a fourth PPDU to the second device. The fourth PPDU can be used for channel contention by the first device. In response to a channel contention conflict occurring in response to the fourth PPDU, the first device can transmit the first PPDU to the second device. That is, the first device can attempt to contend for the channel using the fourth PPDU, and in the case of a channel contention conflict, the first device can contend for the channel using the first PPDU again.

[0166] It should be noted that the present application does not limit the method by which the first device determines that a channel contention conflict has occurred. For example, if an Ack timeout occurs after the PPDU (such as the fourth PPDU) used for channel contention is transmitted, it can be considered that a channel contention conflict has occurred.

[0167] Optionally, the fourth PPDU can be a non-first PPDU (e.g. a non-time-domain A-PPDU). Alternatively, the fourth PPDU can be a normal PPDU.

[0168] It can be understood that the first PPDU has a longer duration than the non-first PPDU, i.e. occupies more time-domain resources. If the channel contention is successful through the fourth PPDU, the channel contention can be completed with less time-domain resources, thereby saving time-domain resources. If the channel contention through the fourth PPDU occurs conflict, the channel contention using the first PPDU can improve the success rate of the channel contention after the channel contention conflict, thereby reducing the impact of the channel contention conflict on the channel contention of the first device and obtaining the channel preferentially.

[0169] The technical solutions related to the fourth PPDU will be described below through Embodiment 2.

[0170] Embodiment 2

[0171] FIG. 11 is a schematic flowchart of a wireless communication process provided by Embodiment 2.

[0172] In FIG. 11, the first device can include STA1. The second device can include AP. The fourth device can include STA2 and / or STA3.

[0173] When STA1 participates in the first channel contention, a normal PPDU (i.e. the fourth PPDU) is used, and a time-domain A-PPDU is not used. When STA1 detects that the first channel contention occurs conflict, a time-domain A-PPDU is used when participating in the second channel contention, thereby obtaining the channel preferentially.

[0174] The second channel contention process in Embodiment 2 can refer to the implementation of Embodiment 1.

[0175] In some embodiments, if the first device is a scheduled STA in a first time period, the first device can send the first PPDU to the second device in the first time period.

[0176] Optionally, the first time period can be a TWT SP or an R-TWT SP. In other words, the present application can be applied in a TWT SP or an R-TWT SP mechanism.

[0177] It can be understood that, when the first device is a station scheduled in the first time period, the second PPDU can be made not to overlap with the normal PPDU by the first PPDU, so as to avoid the first time period being stolen by other stations. In particular, for the case that the first time period is a TWT SP or an R-TWT SP, the first PPDU can avoid stations not scheduled by the TWT SP or the R-TWT SP from stealing the TWT SP or the R-TWT SP, so as to improve the success rate of the scheduled station or the AP obtaining the SP.

[0178] The start time of the channel contention of the first device can be the start of the first time period. Alternatively, the start time of the channel contention of the first device can not be after an arbitration inter-frame space (AIFS) of the channel being idle.

[0179] The technical solutions related to the TWT SP or the R-TWT SP are described below by means of Embodiment 3.

[0180] Embodiment 3

[0181] FIG. 12 is a schematic flowchart of a wireless communication process provided by Embodiment 3.

[0182] In FIG. 12, the first device can include STA1. The second device can include an AP. The fourth device can include STA2 and / or STA3.

[0183] The second channel contention process in Embodiment 3 can refer to the implementation of Embodiment 1. Embodiment 3 differs from Embodiment 1 in the following two aspects. The first aspect is that the start time of the channel contention in Embodiment 3 is the start of the TWT SP or the R-TWT SP, rather than after the AIFS of the channel being idle. The second aspect is that STA1 in Embodiment 3 can use the time-domain A-PPDU because it is a scheduled station of the current TWT SP or R-TWT SP, while STA2 and STA3 are not scheduled stations.

[0184] As can be seen from FIG. 12, STA1 makes the second PPDU not overlap with the normal PPDU sent by STA2 and STA3 by sending the A-PPDU, so as to avoid the Non-HT PPDU containing the RTS from being interfered by the normal PPDU, thereby avoiding the TWT SP or the R-TWT SP from being stolen by other stations.

[0185] In some embodiments, the second PPDU can be transmitted using a dRU.

[0186] It can be understood that, based on the first signal in the first PPDU, the second PPDU can be made not to overlap with other PPDUs, i.e., the first signal can create a long enough guard interval for the second PPDU, so as to avoid the PPDU using the dRU transmission being invalidated due to interference from other PPDUs.

[0187] The technical solutions related to the dRU are described below by means of Embodiment 4.

[0188] Embodiment 4

[0189] FIG. 13 is an example diagram of a communication process provided by Embodiment 4.

[0190] In FIG. 13, the first device can include STA1 or STA2. The second device can include an AP. The fourth device can include STA3.

[0191] In FIG. 13, the STA1 and the STA2 transmit time-domain A-PPDUs. The third PPDU in each time-domain A-PPDU is of a non-HT PPDU format, and the second PPDU is of a UHR PPDU format and contains a dRU.

[0192] It should be noted that the type of the third PPDU in Embodiment 4 is only used as an example, and can be any PPDU type defined in an IEEE 802.11 standard. The type of the second PPDU can only be the UHR PPDU format.

[0193] It can be seen that the STA1 and the STA2 transmit A-PPDUs so that the second PPDU does not overlap with a normal PPDU transmitted by the STA3. That is, the third PPDU creates a long enough guard interval for the second PPDU, so as to avoid the UHR PPDU containing the dRU being invalidated due to interference from the normal PPDU.

[0194] In some embodiments, the second PPDU can include a first field. The first field can be used to indicate an identity of the first device. The first field can be transmitted in overlap with a second field, and the second field can be a field indicating an identity of a third device and transmitted by the third device.

[0195] Exemplarily, the first field and the second field can each include the UIE field described above. Alternatively, the first field and the second field can each include the UIE field and the transceiving state switching field described above.

[0196] It can be appreciated that, based on the first signal in the first PPDU, the second PPDU can be made not to overlap with other PPDUs, i.e., the first signal can create a long enough guard interval for the second PPDU, so that the first field in the second PPDU is not disabled by other PPDUs.

[0197] The technical solutions related to the first field are described below by way of Embodiment 5.

[0198] Embodiment 5

[0199] FIG. 14A and FIG. 14B are both example diagrams of a communication process provided by Embodiment 5.

[0200] In FIG. 14A or FIG. 14B, the first device can include STA1 or STA2. The second device can include an AP. The third device can include STA1 or STA2 different from the first device. The fourth device can include STA3.

[0201] In FIG. 14A, both the STA1 and the STA2 send time-domain A-PPDUs. In each time-domain A-PPDU, the third PPDU is of the non-HT PPDU format, and the second PPDU is of the UHR PPDU format and contains a UIE field.

[0202] In FIG. 14B, both the STA1 and the STA2 send time-domain A-PPDUs. In each time-domain A-PPDU, the third PPDU is of the non-HT PPDU format, and the second PPDU is of the UHR PPDU format and contains a UIE field and a transceiver state switching field (RI field).

[0203] It should be noted that the non-HT PPDU format of the third PPDU in Embodiment 5 is only used as an example, and in fact can be any PPDU format defined in IEEE 802.11 standards. The type of the second PPDU can only be the UHR PPDU format.

[0204] As can be seen from FIG. 14A and FIG. 14B, the STA1 and the STA2 send A-PPDUs so that the second PPDUs do not overlap with the normal PPDUs sent by the STA3, and the third PPDUs create a long enough guard interval for the second PPDUs, so that the UHR PPDUs containing the UIE or containing the UIE and the RI are not disabled by the normal PPDUs.

[0205] In some embodiments, the second PPDU can be used to prevent a first type of device from obtaining a channel. Exemplarily, the first type of device can include a non-UHR station.

[0206] Optionally, the second PPDU can comprise a defer signal. As described above, the defer signal can be used to prevent non-UHR stations from gaining access to the channel.

[0207] It can be understood that, based on the first signal in the first PPDU, the transmission of the second PPDU can be prevented from overlapping with other PPDUs, i.e., the first signal can create a long enough guard interval for the second PPDU, so that the second PPDU comprising the defer signal is not invalidated by other PPDUs.

[0208] It can be understood that, based on the first signal in the first PPDU, the transmission of the second PPDU can be prevented from overlapping with other PPDUs, i.e., the first signal can create a long enough guard interval for the second PPDU, so that the second PPDU comprising the defer signal is not invalidated by other PPDUs.

[0209] Embodiment 6

[0210] FIG. 14C is an example diagram of a communication process provided by an embodiment of the application.

[0211] In FIG. 14C, the first device can comprise STA1 or STA2. The second device can comprise an AP. The fourth device can comprise STA3.

[0212] In FIG. 14C, the STA1 and the STA2 transmit time-domain A-PPDUs. The third PPDU in each time-domain A-PPDU is of a non-HT PPDU format, and the second PPDU is of a UHR PPDU format and comprises a defer signal.

[0213] It should be noted that the third PPDU of the non-HT PPDU format in Embodiment 6 is only used as an example, i.e., it can be any PPDU type defined in the IEEE 802.11 standard. The second PPDU of the UHR PPDU format is only used as an example, i.e., it can be any PPDU type defined in the IEEE 802.11 standard.

[0214] As can be seen from FIG. 14C, the STA1 and the STA2 transmit A-PPDUs so that the second PPDUs do not overlap with the normal PPDU transmitted by the STA3, thereby avoiding the UHR PPDU comprising the defer signal from being invalidated by the normal PPDU.

[0215] In some embodiments, the first device can receive first information transmitted by the second device. The first information can be related to the configuration information of the first signal.

[0216] Optionally, the first information can be used to indicate the actually used configuration information. That is, the first device needs to perform a corresponding operation according to the indication of the first information. Taking an example in which the first device comprises a non-AP STA and the second device comprises an AP, the AP can indicate the actually used configuration information of the first signal to the non-AP STA through the first information.

[0217] In some embodiments, the first information can be used to dynamically adjust the configuration information of the first signal. In other words, the second device can send the first information to the first device to update the configuration information of the first signal. The first device can perform operations related to the first signal according to the most recently received first information. The dynamically adjusted configuration information can be partially or totally different from the configuration information before the dynamic adjustment.

[0218] In some embodiments, the first information can be carried in a control frame. For example, the first information can be carried in a trigger frame. The trigger frame can be one of any trigger frame subtypes defined in the standard. For example, the trigger frame can comprise one or more of the following: Basic Trigger, Beamforming Report Poll Trigger, MU-BAR Trigger, MU-RTS Trigger, Buffer Status Report Poll Trigger, GCR MU-BAR Trigger, Bandwidth Query Report Poll Trigger, NDP Feedback Report Poll Trigger, and a newly defined trigger frame type. The newly defined trigger frame can be, for example, a time A-PPDU report poll trigger (TARP Trigger) frame.

[0219] In some embodiments, the first information can be carried in a management frame. The management frame can comprise, for example, a beacon frame and / or a broadcast frame. In another example, the first information can be carried in one or more of the following: a probe response frame, an association response frame, and a re-association response frame.

[0220] By way of example, the first information can be carried in a broadcast frame. Through the broadcast frame, the second device can configure the same first information to multiple devices, so that the operations related to the first signal performed by the multiple devices remain consistent. For example, based on the first information in the broadcast frame, the multiple devices can simultaneously start sending first signals of the same length, so as to ensure that multiple second PPDUs respectively sent by the multiple devices are aligned.

[0221] In some embodiments, the first device can send second information to the second device. The second information can be related to the configuration information of the first signal.

[0222] Optionally, the second information can be used to indicate suggested configuration information of the first signal. That is, the first device can suggest the configuration of the first signal through the second information. The actual configuration information of the first signal can be determined according to the second information. The actual configuration information of the first signal can be the same as the suggested configuration information of the first signal, or can be different.

[0223] In some embodiments, the second information can be carried in a management frame. For example, the second information can be carried in one or more of the following: a probe request frame, an association request frame, a re-association request frame.

[0224] In some embodiments, the second information can be carried in a control frame. For example, the second information can be carried in the header of an uplink MAC frame. For example, the second information can be carried in an A-control field. Wherein, the A-control field can be in the header of the uplink MAC frame.

[0225] FIG. 15A shows an interaction example of the first information and the second information based on a management frame. In FIG. 15A, the first device comprises a STA, and the second device comprises an AP. The first information is carried in a beacon frame. The second information is carried in a probe request frame.

[0226] FIG. 15B shows another interaction example of the first information and the second information based on a management frame. In FIG. 15B, the first device comprises a STA, and the second device comprises an AP. The first information is carried in a beacon frame. The second information is carried in an association request frame.

[0227] FIG. 15C shows another interaction example of the first information and the second information based on a management frame. In FIG. 15C, the first device comprises a STA, and the second device comprises an AP. The first information is carried in a beacon frame. The second information is carried in a re-association request frame.

[0228] It should be noted that in FIG. 15A, FIG. 15B and FIG. 15C, the configuration information related to the "first information" can be different from the configuration information related to the "first information".

[0229] FIG. 15D shows an interaction example of the first information and the second information based on a control frame. In FIG. 15D, the first device comprises a STA, and the second device comprises an AP. The first information is carried in a TARP trigger frame. The second information is carried in a TB PPDU.

[0230] In some embodiments, the configuration information can include one or more of the following: enabling information, duration information, type information. The following are described respectively.

[0231] The enabling information can be used to indicate whether the first device is capable of transmitting the first PPDU. In other words, the enabling information can be used to indicate whether the first signal can be included in the PPDU transmitted by the first device. For example, the enabling information can be used to indicate whether the time-domain A-PPDU function is enabled.

[0232] The enabling information included in the suggested configuration information can be suggested enabling information, i.e., can be used to suggest whether the first device is capable of transmitting the first PPDU. The enabling information included in the actually used configuration information can be actually used enabling information, i.e., can be used to indicate whether the first device is actually capable of transmitting the first PPDU.

[0233] The enabling information can be carried in the time-domain A-PPDU field. The time-domain A-PPDU field can be indicated by 1 bit. For example, the time-domain A-PPDU field with a value of 1 can indicate that the first device is capable of transmitting the first PPDU; the time-domain A-PPDU field with a value of 0 can indicate that the first device is not capable of transmitting the first PPDU. For another example, the time-domain A-PPDU field with a value of 0 can indicate that the first device is capable of transmitting the first PPDU; the time-domain A-PPDU field with a value of 1 can indicate that the first device is not capable of transmitting the first PPDU.

[0234] It should be noted that the time-domain A-PPDU field is only an example of the name of the field carrying the enabling information, and the field can also have other names. For example, the time-domain A-PPDU field can also be referred to as the time-domain A-PPDU field, the time-domain A-PPDU field, or the time-domain A-PPDU field, etc.

[0235] The duration information can be used to indicate the duration of the first signal and / or the duration of the third PPDU. It can be understood that in some cases, the duration of the first signal can be equal to the duration of the third PPDU. In this case, the duration information can only indicate any one of the duration of the first signal and the duration of the third PPDU.

[0236] In some embodiments, the value of the duration information can include: the duration of the first signal, and / or the duration of the third PPDU.

[0237] For example, the duration information can be carried in the third PPDU duration field and / or the first signal duration field.

[0238] The first signal duration field can occupy 16 bits. The value of the first signal duration field is the duration of the first signal. The unit of the third PPDU duration field is not limited by the present application. For example, the unit can be microseconds.

[0239] The third PPDU duration field can occupy 16 bits. The value of the third PPDU duration field is the duration of the third PPDU. The present application does not limit the unit of the third PPDU duration field. For example, the unit can be microseconds.

[0240] It should be noted that the "third PPDU duration field" and the "first signal duration field" are only examples of the names of fields carrying duration information. The field can also have other names. For example, the "third PPDU duration field" can also be called the "third PPDU length field", the "suggested third PPDU duration field", or the "actually used third PPDU duration field", etc.

[0241] In some embodiments, the value of the duration information can have a mapping relationship with the duration of the first signal. Alternatively, the value of the duration information can have a mapping relationship with the length of the third PPDU. For example, the value of the duration information can be a plurality of subscripts (or called candidate values or indexes), and the plurality of subscripts can correspond one-to-one to a plurality of durations of the first signal (or a plurality of lengths of the third PPDU). Table 1 shows the correspondence between the plurality of subscripts and the durations of the first signal (or the lengths of the third PPDU).

[0242] Table 1

[0243] It should be noted that Table 1 is only an example. Part of the content in Table 1 can be realized independently. The correspondence between the values and meanings in Table 1 can be adjusted. Alternatively, the meanings corresponding to the values in Table 1 can be transformed.

[0244] Optionally, in the case where the duration information is carried in the third PPDU duration field, the third PPDU duration field can occupy 2 bits. The third PPDU duration field can be of an enumeration type, used to indicate the subscript of the duration of the third PPDU. In the case where the duration information is carried in the first signal duration field, the first signal duration field can occupy 2 bits. The first signal duration field can be of an enumeration type, used to indicate the subscript of the duration of the first signal.

[0245] It can be understood that setting the first signal duration field or the third PPDU duration field to be of an enumeration type can reduce the number of bits occupied by the above-mentioned fields.

[0246] The type information can be used to indicate a type of the third PPDU carrying the first signal. The type of the third PPDU can include: a non-HT PPDU, a non-HT duplicated PPDU, an HT PPDU, a VHT PPDU, an HE PPDU, an EHT PPDU, a UHR PPDU, a DMG PPDU, an EDMG PPDU, a CDMG PPDU, a CMMG PPDU, a WUR PPDU, or a S1G PPDU.

[0247] The type information can be carried in a type field of the third PPDU. The type field of the third PPDU can occupy 1 bit or 4 bits.

[0248] It should be noted that the "type field of the third PPDU" is only an example of the name of the field carrying the type information. The field carrying the type information can also have other names. For example, the "type field of the third PPDU" can also be referred to as "suggested type field of the third PPDU" or "actually used type field of the third PPDU".

[0249] In some embodiments, the configuration information can be carried in a first element. The first element can also be referred to as a time A-PPDU control element.

[0250] The first element can include a direction field. The direction field can be used to indicate the transmission direction of the first element. The transmission direction of the first element can be from the first device to the second device or from the second device to the first device. Illustratively, the first element can carry the first information or the second information. In the case of the transmission direction of the first element being from the first device to the second device, the first element can carry the second information; in the case of the transmission direction of the first element being from the second device to the first device, the first element can carry the first information. In other words, the first information and the second information can be distinguished by the direction field.

[0251] Illustratively, the direction field can occupy 1 bit. For example, the direction field taking a value of 1 can indicate that the first element is sent by the second device to the first device, i.e., the element carries the first information; the direction field taking a value of 0 can indicate that the first element is sent by the first device to the second device, i.e., the element carries the second information. For another example, the direction field taking a value of 0 can indicate that the first element is sent by the second device to the first device, i.e., the element carries the first information; the direction field taking a value of 1 can indicate that the first element is sent by the first device to the second device, i.e., the element carries the second information.

[0252] FIG. 16 is a format diagram of a first element according to an embodiment of the present application.

[0253] As shown in FIG. 16, the first element can include one or more of the following fields: element ID, length, element ID extension, direction, whether to turn on time domain A-PPDU, time length of the third PPDU, type of the third PPDU.

[0254] The element ID field and the element ID extension field can jointly indicate that the element is the first element.

[0255] The length field can indicate the number of remaining bytes in the element excluding the element ID and the length fields.

[0256] As described above, the first information can be carried in the trigger frame. FIG. 17A is a schematic diagram of an EHT variant format of a Report Poll Trigger according to an embodiment of the present application. FIG. 17B is a schematic diagram of an HE variant format of a Report Poll Trigger according to an embodiment of the present application.

[0257] As shown in FIG. 17A or FIG. 17B, the first information can be carried in the trigger frame type related general information field. The trigger frame type related general information field can include one or more of the following fields: whether to use time domain A-PPDU, type of the third PPDU, time length of the third PPDU, and reserved.

[0258] FIG. 18 is a schematic diagram of a format of an A-control field carrying second information according to an embodiment of the present application.

[0259] As shown in FIG. 18, the control information field can include one or more of the following fields: whether to use time domain A-PPDU, type of the third PPDU, and time length of the third PPDU.

[0260] It should be noted that the above description takes the first PPDU including the first signal and the second PPDU as an example. The first PPDU can also include other signals. For example, the first PPDU can include a plurality of PPDUs, and the number of PPDUs in the plurality of PPDUs can be greater than or equal to 2. Among them, the plurality of PPDUs can include the third PPDU and the second PPDU. In other words, the first PPDU can be formed by two or more complete and independent PPDUs concatenated in the time domain.

[0261] FIG. 19A and FIG. 19B respectively show an example in which the first PPDU includes 3 PPDUs. The 3 PPDUs are respectively a third PPDU, a second PPDU and a fourth PPDU. In FIG. 19A, there is no interval between the 3 PPDUs. In FIG. 19B, there is a guard interval between the 3 PPDUs. The guard interval between the third PPDU and the second PPDU can be a first interval; the guard interval between the second PPDU and the fourth PPDU can be a second interval. The first interval and the second interval can be the same or different.

[0262] The method embodiments of the present application are described in detail above, and the device embodiments of the present application are described in detail below. It should be understood that the description of the method embodiments corresponds to the description of the device embodiments, and therefore, the parts not described in detail can be referred to the method embodiments.

[0263] FIG. 20 is a schematic structural diagram of a communication device 2000 according to an embodiment of the present application. The communication device 2000 can be a first device. The communication device 2000 can include a sending unit 2010.

[0264] The sending unit 2010 can be configured to send a first PPDU to a second device; wherein the first PPDU includes a first signal and a second PPDU, the first signal being earlier than the second PPDU.

[0265] In an optional embodiment, the sending unit 2010 can be a transceiver 2230. The communication device 2000 can further include a processor 2210 and a memory 2220, as shown in FIG. 22.

[0266] In the embodiments of the present application, the communication device 2000 described above can be configured to perform part or all of the method steps performed by the first device in the method embodiments described above. The communication device 2000 includes units or modules for performing the method steps corresponding to the method steps in the above-mentioned drawings. The method flow has been described in detail in the foregoing embodiments, and the modules in the present embodiment have the same functions or perform the same steps, which will not be described here in detail. However, it should be understood by those skilled in the art that the foregoing textual description can be introduced into the present embodiment, and the modules in the communication device 2000 correspond thereto.

[0267] FIG. 21 is a schematic structural diagram of a communication device 2100 according to an embodiment of the present application. The communication device 2100 can be a second device. The communication device 2100 can include a receiving unit 2110.

[0268] The receiving unit 2110 can be configured to receive a first PPDU sent by a first device; wherein the first PPDU includes a first signal and a second PPDU, the first signal being earlier than the second PPDU.

[0269] In an optional embodiment, the receiving unit 2110 can be a transceiver 2230. The communication device 2100 can further include a processor 2210 and a memory 2220, as shown in FIG. 22.

[0270] In the embodiments of the present application, the communication device 2100 described above can be used to perform part or all of the method steps performed by the first device in the method embodiments described above. The communication device 2100 includes units or modules for performing the method steps corresponding to the method steps described above with reference to the accompanying drawings. The method flow has been described in detail in the foregoing embodiments, and the modules in this embodiment have the same functions or perform the same steps, which will not be described here in detail. However, it should be known by those skilled in the art that the foregoing textual description can be introduced into the present embodiment, and corresponds to the modules in the communication device 2100.

[0271] FIG. 22 is a schematic structural diagram of an apparatus for communication according to an embodiment of the present application. The dashed line in FIG. 22 indicates that the unit or module is optional. The apparatus 2200 can be used to implement the methods described in the foregoing method embodiments. The apparatus 2200 can be a chip or a communication device.

[0272] The apparatus 2200 can include one or more processors 2210. The processor 2210 can support the apparatus 2200 to implement the methods described in the foregoing method embodiments. The processor 2210 can be a general purpose processor or a dedicated processor. For example, the processor can be a central processing unit (CPU). Alternatively, the processor can also be other general purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic components, discrete hardware components, etc. The general purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0273] The apparatus 2200 can further include one or more memories 2220. The memory 2220 stores programs, which can be executed by the processor 2210, so that the processor 2210 performs the methods described in the foregoing method embodiments. The memory 2220 can be independent of the processor 2210 or integrated in the processor 2210.

[0274] The apparatus 2200 can further include a transceiver 2230. The processor 2210 can communicate with other devices or chips through the transceiver 2230. For example, the processor 2210 can perform data transceiving with other devices or chips through the transceiver 2230.

[0275] The embodiment of the present application further provides a computer readable storage medium for storing a program. The computer readable storage medium can be applied to the communication device provided by the embodiment of the present application, and the program causes the computer to execute the method performed by the communication device in the various embodiments of the present application.

[0276] The embodiment of the present application further provides a computer program product. The computer program product includes a program. The computer program product can be applied to the communication device provided by the embodiment of the present application, and the program causes the computer to execute the method performed by the communication device in the various embodiments of the present application.

[0277] The embodiment of the present application further provides a computer program. The computer program can be applied to the communication device provided by the embodiment of the present application, and the computer program causes the computer to execute the method performed by the communication device in the various embodiments of the present application.

[0278] It should be understood that the terms "system" and "network" can be used interchangeably in the present application. In addition, the terms used in the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application. The terms "first", "second", "third", and "fourth" and the like in the specification and claims of the present application and the drawings are used to distinguish different objects, and are not used to describe a particular order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0279] In the embodiments of the present application, a "field" can also be referred to as a "domain", a "subfield" or a "sub-domain". One field can occupy one or more bytes (octets), or one field can occupy one or more bits (bits).

[0280] In the embodiments of the present application, the "indication" mentioned can be direct indication, indirect indication, or can be an indication with an associated relationship. For example, A indicates B, which can mean that A directly indicates B, for example, B can be obtained through A; or A indirectly indicates B, for example, A indicates C, and B can be obtained through C; or A and B have an associated relationship.

[0281] In the embodiments of the present application, "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B according to A does not mean that B is determined only according to A, but B can also be determined according to A and / or other information.

[0282] In the embodiments of the present application, the term "corresponding" can represent a direct or indirect corresponding relationship between the two, can also represent an associated relationship between the two, or can indicate a relationship with the indicated, configured, and the like.

[0283] In the embodiments of the present application, "predefined" or "preconfigured" can be realized by pre-saving corresponding codes, tables or other ways that can be used to indicate related information in devices (for example, including AP and STA), and the specific implementation manner is not limited in the present application. For example, predefinition can refer to definition in the protocol.

[0284] In the embodiments of the present application, the term "and / or" is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents an "or" relationship between the associated objects before and after it.

[0285] In the embodiments of the present application, "including" can mean direct or indirect including. Alternatively, "including" mentioned in the embodiments of the present application can be replaced by "indicating" or "used to determine". For example, A includes B can be replaced by A indicating B or A used to determine B.

[0286] In various embodiments of the present application, the size of the serial number of the above processes does not mean the order of execution, and the execution order of the processes should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0287] In the embodiments of the present application, the "protocol" can refer to a standard protocol in the communication field, for example, can include WiFi protocol and related protocols applied to future WiFi communication system, and the present application does not limit this.

[0288] In several embodiments provided by the present application, it should be understood that the disclosed system, device and method can be implemented by 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, and there can be another division way in actual implementation, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms.

[0289] The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, i.e., may be located in one place, or may be distributed on multiple network units. Part or all of the units can be selected to achieve the purpose of the embodiment of the present application according to actual needs.

[0290] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present alone, or two or more units can be integrated in one unit.

[0291] In the above embodiments, all or part can be realized by software, hardware, firmware or any combination thereof. When realized by software, all or part can be realized in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed by a computer, the computer instructions produce the processes or functions described in the embodiments of the present application. 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 through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) mode. The computer-readable storage medium can be any available medium readable by a computer or a data storage device such as a server, data center, etc. containing one or more available media. The available medium can be a magnetic medium (such as a floppy disk, a hard disk, a magnetic tape), an optical medium (such as a digital video disc (DVD)) or a semiconductor medium (such as a solid state disk (SSD)) and the like.

[0292] 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 can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A wireless communication method, characterized in that: include: The first device sends a first physical layer protocol data unit PPDU to the second device; The first PPDU includes a first signal and a second PPDU, and the first signal is earlier than the second PPDU.

2. The method according to claim 1, characterized in that The first PPDU includes a third PPDU and the second PPDU, and the third PPDU is used to carry the first signal.

3. The method according to claim 1 or 2, characterized in that The second PPDU is used by the first device to perform channel contention.

4. The method according to claim 3, characterized in that The second PPDU includes a request to send (RTS) frame.

5. The method according to claim 3 or 4, characterized in that The method further comprises: The first device sends a fourth PPDU to the second device, where the fourth PPDU is used for the first device to perform channel contention; The sending of the first PPDU by the first device to the second device includes: in response to a channel contention conflict occurring in the fourth PPDU, the first device sending the first PPDU to the second device.

6. The method according to any one of claims 3 to 5, characterized in that The first device sending the first PPDU to the second device includes: If the first device is a scheduled site within a first time period, the first device sends the first PPDU to the second device within the first time period.

7. The method according to claim 6, characterized in that The first time period is TWT SP or R-TWT SP.

8. The method according to any one of claims 3 to 7, characterized in that The second PPDU is transmitted using a distributed resource unit dRU.

9. The method according to any one of claims 3 to 7, characterized in that The second PPDU includes a first field, where the first field is used to indicate an identifier of the first device. The first field can be transmitted overlapping with the second field. The second field is a field sent by a third device and indicates an identifier of the third device.

10. The method according to any one of claims 1 to 9, characterized in that The duration of the first signal is greater than or equal to the duration of a signal sent by a device of the first type.

11. The method according to claim 10, characterized in that The first type of equipment includes: non-UHR sites.

12. The method according to any one of claims 1 to 11, characterized in that The method further comprises: The first device receives first information; The first information is related to the configuration information of the first signal.

13. The method according to claim 12, characterized in that The first information is used to indicate the configuration information actually used.

14. The method according to claim 12 or 13, characterized in that The first information is used to dynamically adjust the configuration information.

15. The method according to any one of claims 12 to 14, characterized in that The first information is carried in a trigger frame.

16. The method according to any one of claims 12 to 15, characterized in that The first information is carried in a broadcast frame.

17. The method according to any one of claims 1 to 16, characterized in that The method further comprises: The first device sends second information; The second information is related to the configuration information of the first signal.

18. The method according to claim 17, characterized in that The second information is used to indicate the recommended configuration information.

19. The method according to claim 17 or 18, characterized in that The second information is carried in the A-control field.

20. The method according to any one of claims 17 to 19, characterized in that The second information is carried in one or more of the following frames: a probe request frame, an association request frame, and a reassociation request frame.

21. The method according to any one of claims 12 to 20, characterized in that The configuration information includes one or more of the following: enabling information, used to indicate whether the first device can send the first PPDU; Duration information, used to indicate the duration of the first signal; Type information, used to indicate the type of the third PPDU carrying the first signal.

22. The method according to claim 21, characterized in that The value of the duration information is the duration of the first signal; or, There is a mapping relationship between the value of the duration information and the duration of the first signal.

23. The method according to claim 21 or 22, characterized in that The type of the third PPDU includes: non-HT PPDU, non-HT Duplicated PPDU, HT PPDU, VHT PPDU, HE PPDU, EHT PPDU, UHR PPDU, DMG PPDU, EDMG PPDU, CDMG PPDU, CMMG PPDU, WUR PPDU, or S1G PPDU.

24. The method according to any one of claims 12 to 23, wherein: The configuration information is carried in a first element, and the first element includes a direction field, and the direction field is used to indicate a transmission direction of the first element.

25. The method according to any one of claims 1 to 24, characterized in that The type of the second PPDU includes: non-HT PPDU, non-HT Duplicated PPDU, HT PPDU, VHT PPDU, HE PPDU, EHT PPDU, UHR PPDU, DMG PPDU, EDMG PPDU, CDMG PPDU, CMMG PPDU, WUR PPDU, or S1G PPDU.

26. The method according to any one of claims 1 to 25, characterized in that A first interval is included between the first signal and the second PPDU.

27. The method according to claim 26, characterized in that The first interval satisfies: The first interval does not contain a waveform; or, The waveform of the first interval is a random waveform or a fixed waveform.

28. A wireless communication method, characterized in that: include: The second device receives a first physical layer protocol data unit PPDU sent by the first device; The first PPDU includes a first signal and a second PPDU, and the first signal is earlier than the second PPDU.

29. The method according to claim 28, characterized in that The first PPDU includes a third PPDU and the second PPDU, and the third PPDU is used to carry the first signal.

30. The method according to claim 29, wherein The type of the third PPDU includes: non-HT PPDU, non-HT Duplicated PPDU, HT PPDU, VHT PPDU, HE PPDU, EHT PPDU, UHR PPDU, DMG PPDU, EDMG PPDU, CDMG PPDU, CMMG PPDU, WUR PPDU, or S1G PPDU.

31. The method according to any one of claims 28 to 30, characterized in that The second PPDU is used by the first device to perform channel contention.

32. The method according to claim 31, characterized in that The second PPDU includes a request to send (RTS) frame.

33. The method according to any one of claims 31 or 32, characterized in that Receiving, by the second device, the first PPDU sent by the first device includes: If the first device is a scheduled site within a first time period, the second device receives the first PPDU sent by the first device within the first time period.

34. The method according to claim 33, wherein The first time period is TWT SP or R-TWT SP.

35. The method according to any one of claims 31 to 34, characterized in that The second PPDU is transmitted using a distributed resource unit dRU.

36. The method according to any one of claims 31 to 34, characterized in that The second PPDU includes a first field, where the first field is used to indicate an identifier of the first device. The first field can be transmitted overlapping with the second field. The second field is a field sent by a third device and indicates an identifier of the third device.

37. The method according to any one of claims 28 to 36, wherein: The duration of the first signal is greater than or equal to the duration of a signal sent by a device of the first type.

38. The method according to claim 37, wherein The first type of equipment includes: non-UHR sites.

39. The method according to any one of claims 28 to 38, wherein The method further comprises: The second device sends first information to the first device; The first information is related to the configuration information of the first signal.

40. The method according to claim 39, wherein The first information is used to indicate the configuration information actually used.

41. The method according to claim 39 or 40, characterized in that The first information is used to dynamically adjust the configuration information.

42. The method according to any one of claims 39 to 41, wherein: The first information is carried in a trigger frame.

43. The method according to any one of claims 39 to 42, wherein: The first information is carried in a broadcast frame.

44. The method according to any one of claims 28 to 43, wherein: The method further comprises: The second device receives second information sent by the first device; The second information is related to the configuration information of the first signal.

45. The method according to claim 44, wherein The second information is used to indicate the recommended configuration information.

46. ​​The method according to claim 44 or 45, characterized in that The second information is carried in the A-control field.

47. The method according to any one of claims 44 to 46, characterized in that The second information is carried in one or more of the following frames: a probe request frame, an association request frame, and a reassociation request frame.

48. The method according to any one of claims 39 to 47, wherein: The configuration information includes one or more of the following: enabling information, used to indicate whether the first device can send the first PPDU; Duration information, used to indicate the duration of the first signal; Type information, used to indicate the type of the third PPDU carrying the first signal.

49. The method according to claim 48, characterized in that The value of the duration information is the duration of the first signal; or, There is a mapping relationship between the value of the duration information and the duration of the first signal.

50. The method according to claim 48 or 49, characterized in that The type of the third PPDU includes: non-HT PPDU, non-HT Duplicated PPDU, HT PPDU, VHT PPDU, HE PPDU, EHT PPDU, UHR PPDU, DMG PPDU, EDMG PPDU, CDMG PPDU, CMMG PPDU, WUR PPDU, or S1G PPDU.

51. The method according to any one of claims 39-50, characterized in that The configuration information is carried in a first element, and the first element includes a direction field, and the direction field is used to indicate a transmission direction of the first element.

52. The method according to any one of claims 28 to 51, wherein The type of the second PPDU includes: non-HT PPDU, non-HT Duplicated PPDU, HT PPDU, VHT PPDU, HE PPDU, EHT PPDU, UHR PPDU, DMG PPDU, EDMG PPDU, CDMG PPDU, CMMG PPDU, WUR PPDU, or S1G PPDU.

53. The method according to any one of claims 28 to 52, wherein: A first interval is included between the first signal and the second PPDU.

54. The method according to claim 53, wherein The first interval satisfies: The first interval does not contain a waveform; or, The waveform of the first interval is a random waveform or a fixed waveform.

55. A communication device, characterized in that The communication device is a first device, and the communication device includes: A sending unit, configured to send a first physical layer protocol data unit PPDU to the second device; The first PPDU includes a first signal and a second PPDU, and the first signal is earlier than the second PPDU.

56. The communication device according to claim 55, characterized in that The first PPDU includes a third PPDU and the second PPDU, and the third PPDU is used to carry the first signal.

57. The communication device according to claim 55 or 56, characterized in that The second PPDU is used by the first device to perform channel contention.

58. The communication device according to claim 57, characterized in that The second PPDU includes a request to send (RTS) frame.

59. The communication device according to claim 57 or 58, characterized in that The communication device is further configured to: Sending a fourth PPDU to the second device, where the fourth PPDU is used by the first device to perform channel contention; The sending unit is specifically configured to: in response to a channel contention conflict occurring in the fourth PPDU, send the first PPDU to the second device.

60. The communication device according to any one of claims 57 to 59, characterized in that The first device sending the first PPDU to the second device includes: If the first device is a scheduled site within a first time period, the first device sends the first PPDU to the second device within the first time period.

61. The communication device according to claim 60, characterized in that The first time period is TWT SP or R-TWT SP.

62. The communication device according to any one of claims 57 to 61, characterized in that The second PPDU is transmitted using a distributed resource unit dRU.

63. The communication device according to any one of claims 57 to 61, characterized in that The second PPDU includes a first field, where the first field is used to indicate an identifier of the first device. The first field can be transmitted overlapping with the second field. The second field is a field sent by a third device and indicates an identifier of the third device.

64. The communication device according to any one of claims 55 to 63, characterized in that The duration of the first signal is greater than or equal to the duration of a signal sent by a device of the first type.

65. The communication device according to claim 64, characterized in that The first type of equipment includes: non-UHR sites.

66. The communication device according to any one of claims 55 to 65, characterized in that The communication device is further configured to: receiving a first message; The first information is related to the configuration information of the first signal.

67. The communication device according to claim 66, characterized in that The first information is used to indicate the configuration information actually used.

68. The communication device according to claim 66 or 67, characterized in that The first information is used to dynamically adjust the configuration information.

69. The communication device according to any one of claims 66 to 68, characterized in that The first information is carried in a trigger frame.

70. The communication device according to any one of claims 66 to 69, characterized in that The first information is carried in a broadcast frame.

71. The communication device according to any one of claims 55 to 70, characterized in that The communication device is further configured to: sending a second message; The second information is related to the configuration information of the first signal.

72. The communication device according to claim 71, characterized in that The second information is used to indicate the recommended configuration information.

73. The communication device according to claim 71 or 72, characterized in that The second information is carried in the A-control field.

74. The communication device according to any one of claims 71 to 73, characterized in that The second information is carried in one or more of the following frames: a probe request frame, an association request frame, and a reassociation request frame.

75. The communication device according to any one of claims 66 to 74, characterized in that The configuration information includes one or more of the following: enabling information, used to indicate whether the first device can send the first PPDU; Duration information, used to indicate the duration of the first signal; Type information, used to indicate the type of the third PPDU carrying the first signal.

76. The communication device according to claim 75, characterized in that The value of the duration information is the duration of the first signal; or, There is a mapping relationship between the value of the duration information and the duration of the first signal.

77. The communication device according to claim 75 or 76, characterized in that The type of the third PPDU includes: non-HT PPDU, non-HT Duplicated PPDU, HT PPDU, VHT PPDU, HE PPDU, EHT PPDU, UHR PPDU, DMG PPDU, EDMG PPDU, CDMG PPDU, CMMG PPDU, WUR PPDU, or S1G PPDU.

78. The communication device according to any one of claims 66 to 77, characterized in that The configuration information is carried in a first element, and the first element includes a direction field, and the direction field is used to indicate a transmission direction of the first element.

79. The communication device according to any one of claims 55 to 78, characterized in that The type of the second PPDU includes: non-HT PPDU, non-HT Duplicated PPDU, HT PPDU, VHT PPDU, HE PPDU, EHT PPDU, UHR PPDU, DMG PPDU, EDMG PPDU, CDMG PPDU, CMMG PPDU, WUR PPDU, or S1G PPDU.

80. The communication device according to any one of claims 55 to 79, characterized in that A first interval is included between the first signal and the second PPDU.

81. The communication device according to claim 80, wherein: The first interval satisfies: The first interval does not contain a waveform; or, The waveform of the first interval is a random waveform or a fixed waveform.

82. A communication device, characterized in that The communication device is a second device, and the communication device includes: A receiving unit, configured to receive a first physical layer protocol data unit PPDU sent by a first device; The first PPDU includes a first signal and a second PPDU, and the first signal is earlier than the second PPDU.

83. The communication device according to claim 82, characterized in that The first PPDU includes a third PPDU and the second PPDU, and the third PPDU is used to carry the first signal.

84. The communication device according to claim 83, characterized in that The type of the third PPDU includes: non-HT PPDU, non-HT Duplicated PPDU, HT PPDU, VHT PPDU, HE PPDU, EHT PPDU, UHR PPDU, DMG PPDU, EDMG PPDU, CDMG PPDU, CMMG PPDU, WUR PPDU, or S1G PPDU.

85. The communication device according to any one of claims 82 to 84, characterized in that The second PPDU is used by the first device to perform channel contention.

86. The communication device according to claim 85, characterized in that The second PPDU includes a request to send (RTS) frame.

87. The communication device according to any one of claims 85 or 86, characterized in that The receiving unit is specifically configured to: If the first device is a scheduled site within the first time period, the first PPDU sent by the first device is received within the first time period.

88. The communication device according to claim 87, characterized in that The first time period is TWT SP or R-TWT SP.

89. The communication device according to any one of claims 85 to 88, characterized in that The second PPDU is transmitted using a distributed resource unit dRU.

90. The communication device according to any one of claims 85 to 88, characterized in that The second PPDU includes a first field, where the first field is used to indicate an identifier of the first device. The first field can be transmitted overlapping with the second field. The second field is a field sent by a third device and indicates an identifier of the third device.

91. The communication device according to any one of claims 82 to 90, characterized in that The duration of the first signal is greater than or equal to the duration of a signal sent by a device of the first type.

92. The communication device according to claim 91, wherein The first type of equipment includes: non-UHR sites.

93. The communication device according to any one of claims 82 to 92, characterized in that The communication device is further configured to: sending first information to the first device; The first information is related to the configuration information of the first signal.

94. The communication device according to claim 93, characterized in that The first information is used to indicate the configuration information actually used.

95. The communication device according to claim 93 or 94, characterized in that The first information is used to dynamically adjust the configuration information.

96. The communication device according to any one of claims 93 to 95, characterized in that The first information is carried in a trigger frame.

97. The communication device according to any one of claims 93 to 96, characterized in that The first information is carried in a broadcast frame.

98. The communication device according to any one of claims 82 to 97, characterized in that The communication device is further configured to: receiving second information sent by the first device; The second information is related to the configuration information of the first signal.

99. The communication device according to claim 98, characterized in that The second information is used to indicate the recommended configuration information.

100. The communication device according to claim 98 or 99, characterized in that The second information is carried in the A-control field.

101. The communication device according to any one of claims 98 to 100, characterized in that The second information is carried in one or more of the following frames: a probe request frame, an association request frame, and a reassociation request frame.

102. The communication device according to any one of claims 93 to 101, characterized in that The configuration information includes one or more of the following: enabling information, used to indicate whether the first device can send the first PPDU; Duration information, used to indicate the duration of the first signal; Type information, used to indicate the type of the third PPDU carrying the first signal.

103. The communication device according to claim 102, characterized in that The value of the duration information is the duration of the first signal; or, There is a mapping relationship between the value of the duration information and the duration of the first signal.

104. The communication device according to claim 102 or 103, characterized in that The type of the third PPDU includes: non-HT PPDU, non-HT Duplicated PPDU, HT PPDU, VHT PPDU, HE PPDU, EHT PPDU, UHR PPDU, DMG PPDU, EDMG PPDU, CDMG PPDU, CMMG PPDU, WUR PPDU, or S1G PPDU.

105. The communication device according to any one of claims 102-104, characterized in that The configuration information is carried in a first element, and the first element includes a direction field, and the direction field is used to indicate a transmission direction of the first element.

106. The communication device according to any one of claims 82 to 105, characterized in that The type of the second PPDU includes: non-HT PPDU, non-HT Duplicated PPDU, HT PPDU, VHT PPDU, HE PPDU, EHT PPDU, UHR PPDU, DMG PPDU, EDMG PPDU, CDMG PPDU, CMMG PPDU, WUR PPDU, or S1G PPDU.

107. The communication device according to any one of claims 82 to 106, characterized in that A first interval is included between the first signal and the second PPDU.

108. The communication device according to claim 107, characterized in that The first interval satisfies: The first interval does not contain a waveform; or, The waveform of the first interval is a random waveform or a fixed waveform.

109. A communication device, characterized in that The device comprises a memory and a processor, wherein the memory is used to store a program, and the processor is used to call the program in the memory so as to enable the communication device to execute the method according to any one of claims 1 to 54.

110. A device, characterized in that The device comprises a processor configured to call a program from a memory so as to cause the device to execute the method according to any one of claims 1 to 54.

111. A chip, characterized in that: The device comprises a processor configured to call a program from a memory so that a device equipped with the chip executes the method according to any one of claims 1 to 54.

112. A computer-readable storage medium, characterized in that A program is stored thereon, the program causing a computer to execute the method according to any one of claims 1 to 54.

113. A computer program product, characterized in that The method comprises a program for causing a computer to execute the method according to any one of claims 1 to 54.

114. A computer program, characterized in that The computer program causes a computer to execute the method according to any one of claims 1 to 54.

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