Communication method, apparatus, device, and storage medium

Abstract

Embodiments of the present application provide a communication method, device, equipment and storage medium, and belong to the technical field of WIFI communication. The method comprises the following steps: transmitting a first PPDU; at least one first non-access point station sends a preemption request signal to an access point station at a first time after the end of the first PPDU, wherein the preemption request signal comprises an L-STF, a first sequence or a second sequence, and the second sequence is obtained by combining the L-STF and the first sequence. The format of the preemption request signal is clarified.

Description

Technical Field

[0001] This application belongs to the field of WIFI communication technology, specifically relating to a communication method, device, equipment, and storage medium. Background Technology

[0002] The Institute of Electrical and Electronics Engineers (IEEE) 802.11 Ultra High Reliability (UHR) standard requires not only meeting the requirements of ultra-high reliability, but also meeting the requirements of low-latency traffic (LLT).

[0003] To satisfy LLT (Local Time Limit), the length of each Physical Layer Protocol Data Unit (PPDU) within a Transmission Opportunity (TXOP) can be limited, and a preemption mechanism for radio resources can be added. This mechanism involves a station requiring LLT sending a preemption request signal to the access point station during the interframe space (IFS) between PPDUs of other stations to preempt radio resources for transmission. However, how to configure the preemption request signal to implement this mechanism is currently undetermined. Summary of the Invention

[0004] This application relates to a communication method, apparatus, device, and storage medium, which provides specific preemption request signals to implement a preemption mechanism for wireless resources.

[0005] In a first aspect, embodiments of this application provide a communication method, including:

[0006] Receive part or all of the first physical layer protocol data unit (PPDU);

[0007] At the first moment after the first PPDU ends, a preemption request signal is sent. The preemption request signal includes: a traditional short training field L-STF, a first sequence or a second sequence, wherein the second sequence is obtained by combining L-STF and the first sequence.

[0008] In one possible implementation, the first sequence occupies X symbols in the time domain, where X is a positive integer, X is predefined, or X is indicated by the first PPDU or management frame.

[0009] In one possible implementation, X is 1 or 2.

[0010] In one possible implementation, the first sequence is one of the following sequences:

[0011] ZC sequence, golden sequence, M sequence, Walsh sequence.

[0012] In one possible implementation, the first sequence is modulated onto the carrier using orthogonal frequency division multiplexing (OFDM).

[0013] In one possible implementation, the method further includes:

[0014] Receive configuration information, which includes the first sequence.

[0015] In one possible implementation, the method further includes:

[0016] Send an association request, which includes an indication of low-latency service requirements.

[0017] In one possible implementation, receiving part or all of the first PPDU includes:

[0018] Receive part or all of the first PPDU within the first transmission opportunity; the first moment is within the first transmission opportunity.

[0019] The first transmission opportunity is either a transmission opportunity of an access point station or a transmission opportunity of a second non-access point station; wherein, the access point station is connected to the first non-access point station, the second non-access point station is another non-access point station connected to the access point station connected to the first non-access point station, and the first non-access point station is the device that sends the preemption request signal.

[0020] In one possible implementation, the first PPDU is used to indicate permission to send a preemption request signal within the first transmission opportunity.

[0021] In one possible implementation, the method further includes:

[0022] Receive indication information, the indication information indicating that a preemption request signal may be sent within a transmission opportunity of any site within the Basic Service Set (BSS) of the access point site, the site including the access point site or the second non-access point site.

[0023] In one possible implementation, the first time point is located within the first inter-frame interval (IFS) after the first PPDU ends, where the first IFS is either the Point Coordination Function Inter-Frame Interval (PIFS) or the Short Inter-Frame Interval (SIFS).

[0024] In one possible implementation, the first PPDU is also used to indicate that a preemption request signal is permitted to be sent within the first IFS.

[0025] In one possible implementation, when the Media Access Control Protocol Data Unit (MPDU) in the first PPDU requires acknowledgment or block acknowledgment, the first IFS is the SIFS, and the preemption request signal includes the L-STF or the first sequence.

[0026] In one possible implementation, the time interval between the first time and the end time of the first PPDU is 4 μs.

[0027] Secondly, embodiments of this application provide a communication method, including:

[0028] Transmit the first physical layer protocol data unit (PPDU);

[0029] After the first PPDU ends, at least one preemption request signal is received. Each preemption request signal includes a traditional short training field L-STF, a first sequence, or a second sequence, wherein the second sequence is obtained by combining L-STF and the first sequence.

[0030] In one possible implementation, the first sequence included in the at least one preemption request signal is different.

[0031] In one possible implementation, for any preemption request signal, if the first sequence included in the preemption request signal is configured to N non-access point sites, then a protocol data unit feedback report query process or a buffer status report query process is performed with the N non-access point sites to determine the non-access point site that sent the preemption request signal, where N is a positive integer greater than or equal to 2.

[0032] In one possible implementation, for any preemption request signal, if the preemption request signal is the L-STF, then a protocol data unit feedback report query process or a buffer status report query process is performed with all non-access point sites in the basic service set (BSS) of the access point site or all non-access point sites whose associated requests include low latency service requirement indications, to determine the non-access point site that sent the preemption request signal.

[0033] In one possible implementation, the first sequence occupies X symbols in the time domain, where X is a positive integer, X is predefined, or X is indicated by the first PPDU or management frame.

[0034] In one possible implementation, X is 1 or 2.

[0035] In one possible implementation, the first sequence is one of the following sequences:

[0036] ZC sequence, golden sequence, M sequence, Walsh sequence.

[0037] In one possible implementation, the method further includes:

[0038] Configure the first sequence according to the service requirements of the at least one preemption request signal sending device.

[0039] In one possible implementation, receiving at least one preemption request signal includes:

[0040] The first transmission opportunity is a transmission opportunity of an access point site or a transmission opportunity of a second non-access point site.

[0041] Wherein, the access point site is connected to at least one first non-access point site, the second non-access point site is another non-access point site connected to the access point site connected to at least one first non-access point site, and the at least one first non-access point site is the sending device of the at least one preemption request signal.

[0042] In one possible implementation, the first PPDU is used to indicate that a preemption request signal is permitted to be sent within the first transmission opportunity.

[0043] In one possible implementation, the method further includes:

[0044] Sending indication information, the indication information instructing to send a preemption request signal within the transmission opportunity of any site within the BSS of the access point site, the site including the access point site or the second non-access point site.

[0045] In one possible implementation, the first PPDU is further used to indicate that a preemption request signal is permitted to be sent within a first inter-frame interval (IFS) after the first PPDU ends, wherein the first IFS is a Point Coordination Function Inter-Frame Interval (PIFS) or a Short Inter-Frame Interval (SIFS).

[0046] In one possible implementation, when the Media Access Control Protocol Data Unit (MPDU) in the first PPDU requires acknowledgment or block acknowledgment, the first IFS is the SIFS, and the preemption request signal is the L-STF or the first sequence.

[0047] Thirdly, embodiments of this application provide a communication device, including:

[0048] The receiving module is used to receive part or all of the first physical layer protocol data unit (PPDU).

[0049] The sending module is used to send a preemption request signal at the first moment after the first PPDU ends. The preemption request signal includes: a traditional short training field L-STF, a first sequence or a second sequence, wherein the second sequence is obtained by combining L-STF and the first sequence.

[0050] Fourthly, embodiments of this application provide a communication device, including:

[0051] The transmission module is used to transmit the first physical layer protocol data unit (PPDU).

[0052] The receiving module is configured to receive at least one preemption request signal after the first PPDU ends. Each preemption request signal includes a conventional short training field L-STF, a first sequence, or a second sequence, wherein the second sequence is obtained by combining L-STF with the first sequence.

[0053] Fifthly, embodiments of this application provide an electronic device, including: a processor and a memory;

[0054] The memory stores computer-executed instructions;

[0055] The processor executes computer execution instructions stored in the memory, causing the processor to perform the method as described in the first or second aspect.

[0056] In a sixth aspect, embodiments of this application provide a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement the method described in the first or second aspect.

[0057] In a seventh aspect, embodiments of this application provide a computer program product, including a computer program that, when executed by a processor, implements the method described in the first or second aspect.

[0058] Eighthly, embodiments of this application provide a chip on which a computer program is stored, and when the computer program is executed by the chip, it implements the method described in the first or second aspect.

[0059] In one possible implementation, the chip is a chip in a chip module.

[0060] This application provides a communication method, apparatus, device, and storage medium. In this method, a first PPDU is transmitted, and at least one first non-access point station sends a preemption request signal to an access point station at a first moment after the first PPDU ends. The preemption request signal includes an L-STF, a first sequence, or a second sequence, wherein the second sequence is obtained by combining the L-STF and the first sequence. The format of the preemption request signal is clearly defined. Attached Figure Description

[0061] Figure 1 This is a schematic diagram of the downlink transmission process in related technologies;

[0062] Figure 2 A schematic diagram illustrating the process of downlink transmission being preempted by uplink low-latency services, provided for related technologies;

[0063] Figure 3 A flowchart illustrating a communication method provided in an embodiment of this application. Figure 1 ;

[0064] Figure 4 This is a schematic diagram of the L-STF structure in the time domain provided in an embodiment of this application;

[0065] Figure 5 A flowchart illustrating a communication method provided in an embodiment of this application. Figure 2 ;

[0066] Figure 6 A flowchart illustrating a communication method provided in an embodiment of this application. Figure 3 ;

[0067] Figure 7 A flowchart illustrating a communication method provided in an embodiment of this application. Figure 4 ;

[0068] Figure 8 A flowchart illustrating a communication method provided in an embodiment of this application. Figure 5 ;

[0069] Figure 9 A flowchart illustrating a communication method provided in an embodiment of this application. Figure 6 ;

[0070] Figure 10 This is a schematic diagram of the structure of a communication device provided in an embodiment of this application;

[0071] Figure 11 This is a schematic diagram of another communication device provided in an embodiment of this application;

[0072] Figure 12 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0073] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0074] In this application, "at least one" means one or more. "More than one" means two or more.

[0075] The use of terms like "first" and "second" in this application is for illustrative purposes and to distinguish the objects being described. There is no particular order between them, nor does it imply a specific limitation on the number of devices in the embodiments of this application, and they do not constitute any restriction on the embodiments of this application. For example, "first non-access point site" and "second non-access point site" are only used to distinguish different non-access point sites, and do not indicate a difference in priority or importance between the two non-access point sites.

[0076] In this application, terms such as "exemplary," "in some embodiments," and "in other embodiments" are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Rather, the term "exemplary" is used to present the concept in a specific manner.

[0077] In this application embodiment, the access point station (AP STA) can be simply referred to as AP; the non-access point station (non-AP STA) in this application embodiment can be simply referred to as STA.

[0078] To explain this application more clearly, the relevant technologies involved in this application will be introduced first below.

[0079] 1. Null data protocol data unit feedback report poll (NFRP) process

[0080] An AP queries one or more STAs to determine if the STA is within coverage and in an awake state. After receiving a NERP trigger frame (TF), the STA replies with a Null data protocol data unit feedback report (NFR) on the resource unit (RU) allocated by the AP. At the same time, the NFR can indicate that the STA has uplink data to send.

[0081] 2. Buffer Status Report Poll (BSRP) Process

[0082] An AP queries one or more STAs to determine the amount of uplink data to be sent by the STA. After receiving a BSRP trigger frame, the STA replies with a data frame on the RU assigned by the AP. The Quality of Service (QoS) control field or A control subfield of the data frame indicates the Buffer Status Report (BSR).

[0083] 3. Mechanism for seizing wireless resources

[0084] In related technologies, UHR communication can meet LLT requirements through the following two methods.

[0085] Method 1: Limit the length of the TXOP so that sites with LLT requirements can obtain the opportunity for Enhanced Distributed Channel Access (EDCA) without waiting for a long TXOP. The problems with short TXOPs are: higher EDCA overhead in the time domain and a higher proportion of the physical layer header (PHY Header) in the PPDU, reducing system efficiency.

[0086] Method 2: Limit the length of each PPDU within the TXOP, and add a mechanism for PPDUs to preempt radio resources. This mechanism includes: a station requiring LLT can send a Preemption Request (PR) signal to the AP via the IFS between PPDUs within another station's TXOP to preempt radio resources for transmission. This method only increases the proportion of the PHY Header in the PPDU.

[0087] To facilitate understanding Method Two, the following will combine... Figure 1 and Figure 2 Explain the mechanism for preempting wireless resources.

[0088] Figure 1 This is a schematic diagram of the downlink transmission process in related technologies. For example... Figure 1 As shown, AP sends a Request to Send (RTS) to STA1; after the RTS ends, STA1 sends a Clear to Send (CTS) to AP after a Short Interframe Space (SIFS); after the CTS ends, AP sends a Down Link (DL) PPDU to STA1 after a SIFS, with an IFS interval between each DL PPDU.

[0089] Figure 2 This is a schematic diagram illustrating the process of downlink transmission being preempted by uplink low-latency services, provided for related technologies. For example... Figure 2 As shown, the AP sends an RTS to STA1, indicating that the STA is allowed to send a PR signal within the xIFS of this TXOP. xIFS is an inter-frame interval awaiting definition. After the RTS ends, STA1 sends a CTS frame to the AP after a SIFS interval. After the CTS frame ends, the AP sends a DL PPDU to STA1 after a SIFS interval. The header of each DL PPDU supports whether PR signal transmission is allowed at time Tp after the end of this frame, where Tp is awaiting definition. During the transmission of the first DL PPDU, STA2 and STA3 have low-latency data transmission requirements. Therefore, STA2 and STA3 can send a PR signal to the AP after the first DL PPDU ends, after a Tp interval. If the AP receives the PR signal at xIFS, the AP can collect the STAs that need to send uplink data through an NFRP trigger frame or an NFR response after the PR signal and a SIFS interval. Subsequently, the AP schedules uplink resources to the corresponding STAs for transmitting low-latency (LL) PPDUs.

[0090] The above-mentioned preemption mechanism for radio resources does not specify the format of the PR signal, and if multiple STAs send PR signals to the AP at the same time, the AP must determine the STA that needs LLT through the NERP process.

[0091] To address the aforementioned technical problems, this application provides a communication method that defines the specific format of the PR signal.

[0092] The technical solutions shown in this application will now be described in detail through specific embodiments. It should be noted that the following embodiments may exist independently or in combination with each other; identical or identical content will not be repeated in different embodiments.

[0093] Figure 3 A flowchart illustrating a communication method provided in an embodiment of this application. Figure 1 .like Figure 3 As shown, the method includes:

[0094] S301, the second STA, and the AP are transmitting the first PPDU.

[0095] The first PPDU can be a downlink PPDU sent by the AP to the second STA, or an uplink PPDU sent by the second STA to the AP.

[0096] When the second STA and the AP are transmitting the first PPDU, the first STA can receive part or all of the first PPDU and determine the end time of the first PPDU based on part or all of the first PPDU.

[0097] The first PPDU part can refer to the header of the first PPDU.

[0098] In one possible implementation, the first STA may receive part or all of the first PPDU during the first transmission opportunity.

[0099] The first transmission opportunity can be either the transmission opportunity of the AP or the transmission opportunity of the second STA; wherein, the AP is connected to the first STA, and the second STA is another STA connected to the AP connected to the first STA, that is, the AP is connected to the first STA and the second STA, and the first STA is the transmitting device of the PR signal.

[0100] In one possible implementation, the first PPDU can be used to indicate permission to send a PR signal within the first transmission opportunity.

[0101] The first PPDU can display a directional indication, meaning the first PPDU can be used to indicate that some first STAs are allowed to send PR signals during the first transmission opportunity; the first PPDU can also display a non-directional indication, meaning the first PPDU can be used to indicate that all first STAs capable of receiving the first PPDU are allowed to send PR signals during the first transmission opportunity; the first PPDU can also implicitly indicate that some first STAs are not allowed to send PR signals during the first transmission opportunity, which is equivalent to the first PPDU indicating that other first STAs besides some first STAs are allowed to send PR signals during the first transmission opportunity.

[0102] For example, the PHY SIG of the PPDU may indicate that the PR signal is allowed to be sent within the first transmission opportunity.

[0103] In one possible implementation, the first PPDU can also be used to indicate that the PR signal is not allowed to be sent during the first transmission opportunity.

[0104] The first PPDU can display a directional indication, that is, the first PPDU can directly indicate that some first STAs are not allowed to send PR signals during the first transmission opportunity; the first PPDU can also display a non-directional indication, that is, the first PPDU can directly indicate that all first STAs that can receive the first PPDU are not allowed to send PR signals during the first transmission opportunity; the first PPDU can also implicitly indicate, that is, the first PPDU can indicate that some first STAs are allowed to send PR signals during the first transmission opportunity, which is equivalent to the first PPDU indicating that other first STAs besides some first STAs are not allowed to send PR signals during the first transmission opportunity.

[0105] When a first STA detects that the first PPDU indicates that it is not allowed to send the PR signal during the first transmission opportunity, the first STA may enter a sleep state during the first transmission opportunity.

[0106] In one possible implementation, the AP may also send an instruction message (which is received by the first STA). The instruction message may indicate that a PR signal may be sent within a transmission opportunity of any site within the AP's Basic Service Set (BSS), including the AP or the second STA.

[0107] The instruction information can be carried by the beacon frame.

[0108] For example, the indication information can be carried by the UHR operation element in the beacon frame.

[0109] In one possible implementation, the first PPDU can also be used to indicate that the PR signal can be sent within the first IFS after the first PPDU ends.

[0110] The first IFS is the Point Coordination Function Interframe Space (PIFS) or SIFS.

[0111] For example, the PHY SIG of the PPDU can indicate that the PR signal is allowed to be sent within the first IFS after the first PPDU ends.

[0112] In one possible implementation, if the first PPDU is used to indicate that the PR signal can be sent within the first transmission opportunity (referred to as the first type of indication information), and is also used to indicate that the PR signal can be sent within the first IFS after the first PPDU ends (referred to as the second type of indication information), and the AP also sends an indication information indicating that the PR signal can be sent within the transmission opportunity of any station within the AP's BSS (referred to as the third type of indication information), then the priority of the three types of indication information is the second type of indication information > the first type of indication information > the third type of indication information.

[0113] In one possible implementation, the first IFS is SIFS when the Medium Access Control Protocol Data Unit (MPDU) in the first PPDU requires acknowledgment or block acknowledgment.

[0114] S302. At least one first STA sends a PR signal at the first moment after the first PPDU ends. The PR signal includes: a Legacy Short Training Field (L-STF), a first sequence or a second sequence, wherein the second sequence is obtained by combining the L-STF with the first sequence.

[0115] In other words, the AP receives at least one PR signal after the first PPDU ends.

[0116] If at least one first STA sends a PR signal to the AP, and the PR signal is L-STF, then the AP can receive at least one identical PR signal, or receive only one PR signal.

[0117] For example, if three STAs send PR signals to the AP, and the PR signals are L-STF, then the AP can receive three identical PR signals or receive one PR signal.

[0118] The first STA can refer to a STA with low-latency transmission requirements.

[0119] The number of STAs can be one or more.

[0120] L-STF is a traditional short training field defined in IEEE 802.11.

[0121] L-STF occupies 8 μs in the time domain, and its structure is as follows: Figure 4 As shown.

[0122] In one possible implementation, the first sequence occupies X symbols in the time domain, where X is a positive integer, X is predefined by the protocol, or X is indicated by the first PPDU or management frame.

[0123] For example, X can be indicated by the PHY SIG of the first PPDU.

[0124] Management frames can be beacon frames or associated response frames, etc.

[0125] Each symbol can occupy 4μs in the time domain, where 4μs = 3.2μs of symbol + 0.8μs of guard interval.

[0126] In one possible implementation, X can be 1 or 2. That is, the first sequence can occupy 4 μs or 8 μs in the time domain.

[0127] When the first sequence occupies 4 μs in the time domain, the second sequence occupies 12 μs in the time domain; when the first sequence occupies 8 μs in the time domain, the second sequence occupies 16 μs in the time domain.

[0128] If the length of the PR signal in the time domain is less than or equal to 8 μs, the first PPDU instruction is not required to allow the preemption request signal to be sent within the first IFS after the first PPDU ends. If the length of the PR signal in the time domain is greater than 8 μs, the first PPDU instruction is required to allow the preemption request signal to be sent within the first IFS after the first PPDU ends.

[0129] If the length of the PR signal in the time domain is less than or equal to 8 μs, the first STA can send the PR signal within the first transmission opportunity, regardless of whether the MPDU in the first PPDU requires immediate acknowledgment or block acknowledgment.

[0130] In one possible implementation, the first sequence can occupy 20MHz in the frequency domain, i.e., 52 subcarriers. When the bandwidth exceeds 20MHz, the signal on the main 20MHz is repeated on the non-main 20MHz.

[0131] In one possible implementation, the first sequence can be modulated onto the carrier using Orthogonal Frequency Division Multiplexing (OFDM).

[0132] For example, when X is 1, the first sequence occupies 4 μs in the time domain, the length of the first sequence is 48, the first sequence can be modulated onto 48 subcarriers, and the remaining 4 subcarriers can be used for pilot signals; when X is 2, the first sequence occupies 8 μs in the time domain, the length of the first sequence is 96, the first sequence can be modulated onto 96 subcarriers, and the remaining 8 subcarriers can be used for pilot signals.

[0133] In one possible implementation, the first sequence can be one of the following sequences: ZC sequence, gold sequence, M sequence, or Walsh sequence.

[0134] It should be noted that this application does not limit the specific form of the first sequence, as long as the first sequence meets the following characteristics: when multiple first sequences are transmitted together in the air by different STAs, the AP can receive multiple first sequences at the same time.

[0135] In one possible implementation, when the PR signal is the first sequence, the first STA can obtain the first sequence in the following way:

[0136] The first STA sends an association request to the AP, which includes an indication of low-latency service requirements. Based on the first STA's service requirements, the AP configures a first sequence for the first STA and sends configuration information to the first STA, which includes the first sequence.

[0137] The AP can configure different first sequences for different STAs, so that the AP can determine the STA that sends the PR signal based on the sequence of the PR signal, without having to determine the STA that sends the PR signal through the NERP or BSRP process.

[0138] After the AP configures the first sequence for the STA, the preemption request signal sent by the STA to the AP can be either the first sequence or the second sequence.

[0139] If the AP configures the same first sequence to multiple STAs, these multiple STAs send preemption request signals to the AP. The preemption request signals include the first sequence (i.e., the preemption request signal is the first sequence or the second sequence). The AP can receive multiple identical preemption request signals, or the AP can receive only one preemption request signal.

[0140] For example, the AP configures the first sequence of STA1 as sequence 1, and the first sequence of STA2 and STA3 as sequence 2. When STA1, STA2 and STA3 send PR signals to the AP, the PR signals include the first sequence. The AP can receive three PR signals, which consist of one PR signal with the first sequence as sequence 1 and two PR signals with the first sequence as sequence 2. Alternatively, the AP can also receive two PR signals, with the first sequences of the two PR signals being sequence 1 and sequence 2, respectively.

[0141] In one possible implementation, if the first IFS is SIFS, the PR signal may include L-STF or the first sequence.

[0142] In one possible implementation, the first moment can be within the first transmission opportunity. That is, at least one first STA transmits the PR signal within the first transmission opportunity, and the AP receives the PR signal within the first transmission opportunity.

[0143] In one possible implementation, the first moment can be located within the first IFS after the first PPDU ends.

[0144] In one possible implementation, the time interval between the first moment and the end moment of the first PPDU is 4μs.

[0145] In one possible implementation, for any preemption request signal received by the AP, if the PR signal is L-STF, the AP needs to perform an NFRP or BSRP process with all STAs in the AP's BSS or all STAs whose associated requests include low-latency service requirement indications to determine the STA that sent the PR signal.

[0146] For example, the BSS of the AP includes 5 first STAs and 5 other STAs. The 5 first STAs are first STA1, first STA2, first STA3, first STA4 and first STA5. If two first STAs send PR signals to the AP, the PR signals are L-STF. After receiving the PR signals, the AP does not know which STAs sent the PR signals. It needs to perform an NFRP or BSRP process with the 5 first STAs and 5 other STAs, or an NFRP or BSRP process with the 5 first STAs, to determine which STA sent the PR signals.

[0147] If the AP receives multiple identical PR signals, and the PR signals are L-STF, for these multiple identical PR signals, the AP only needs to perform an NFRP or BSRP process with all STAs in the AP's BSS or all STAs whose associated requests include low latency service requirement indications to determine the STA that sent the PR signal.

[0148] In one possible implementation, if the PR signal is a first sequence or a second sequence, and the first sequence or the second sequence used by each first STA is different, then if p first STAs send PR signals, the AP receives p different PR signals, where p is a positive integer. The AP can determine the first STA that sent the PR signal based on the sequence of each PR signal.

[0149] In one possible implementation, for any PR signal received by the AP, the PR signal is either a first sequence or a second sequence. If the AP assigns the first sequence included in the PR signal to N STAs, then the AP needs to perform an NFRP or BSRP process with the N STAs to determine the STAs that send the PR signal, where N is a positive integer greater than or equal to 2.

[0150] For example, an AP connects to five STAs: STA1, STA2, STA3, STA4, and STA5. Based on the low-latency service requirements of the five STAs, the AP configures the first sequence as Sequence 1 for STA1, Sequence 2 for STA2, and Sequence 3 for STA3, STA4, and STA5. If STA1, STA2, STA3, and STA4 all send PR signals to the AP, the AP can determine that STA1 and STA2 sent PR signals based on the received PR signals. However, for the PR signal with the first sequence Sequence 3, the AP does not know which STAs sent it. In this case, the AP needs to perform an NFRP or BSRP procedure with STA3, STA4, and STA5 to determine which STA sent the PR signal with the first sequence Sequence 3.

[0151] If the AP receives multiple identical PR signals, and the PR signals include a first sequence, and the first sequence is configured to N STAs, then for these multiple identical PR signals, the AP only needs to perform one NFRP or BSRP procedure with the N STAs to determine which STA sent the PR signal.

[0152] exist Figure 3 Based on the embodiments shown, the process of this application will be described in detail below with reference to specific examples.

[0153] Figure 5 A flowchart illustrating a communication method provided in an embodiment of this application. Figure 2 .like Figure 5 As shown, taking the PR signal as the first sequence as an example, the method includes:

[0154] The AP sends a DL PPDU to STA1 (the second STA) within its own transmission opportunity. The PHY SIG of the DL PPDU indicates that the PR signal can be sent within the AP's transmission opportunity, and also indicates that the PR signal can be sent within the first IFS after the DL PPDU ends. The first IFS is either PIFS or SIFS.

[0155] During the transmission of DL PPDU, STA2 and STA3 (the first STA) have low-latency service data that need to be transmitted to the AP. STA2 and STA3 receive part or all of the DL PPDU within the AP's transmission opportunity and determine the end time of the DL PPDU based on the part or all of the DL PPDU. STA2 and STA3 send PR signals to the AP at the first moment after the end time of the DL PPDU. The first sequence of the two PR signals occupies 4*Xμs in the time domain, where X is 1 or 2. The first sequences of the two PR signals are different, and the time interval between the first moment and the end time of the DL PPDU is 4μs.

[0156] After receiving two different PR signals within its own transmission opportunity, the AP determines that STA2 and STA3 are sending the PR signals based on the sequence of the PR signals, and sends a trigger frame to STA2 and / or STA3. The time interval between the time of sending the trigger frame and the time of the end of the PR signal is less than or equal to 16μs.

[0157] After receiving the trigger frame, STA2 and / or STA3 send uplink low-latency data to the AP. After receiving the low-latency data, the AP sends a Block Acknowledge (BA) to STA2 and / or STA3, and continues to send a DL PPDU to STA1 after the SIFS interval. The PHY SIG of the DL PPDU indicates that the PR signal can be sent within the AP's transmission opportunity, and also indicates that the PR signal cannot be sent within the first IFS after the DL PPDU ends.

[0158] exist Figure 5 In the illustrated embodiment, the PR signal uses a first sequence, and the AP can determine the STA that sent the PR signal based on the first sequence of the PR signal. If the AP configures the same first sequence for multiple STAs, when the AP receives a PR signal with the first sequence, it can perform an NFRP or BSRP procedure with the multiple STAs to determine the STA that sent the PR signal.

[0159] Figure 6 A flowchart illustrating a communication method provided in an embodiment of this application. Figure 3 .like Figure 6 As shown, taking the PR signal as an L-STF as an example, the method includes:

[0160] The AP sends a DL PPDU to STA1 (the second STA) within its own transmission opportunity. The PHY SIG of the DL PPDU indicates that the PR signal can be sent within the AP's transmission opportunity, and also indicates that the PR signal can be sent within the first IFS after the DL PPDU ends. The first IFS is either PIFS or SIFS.

[0161] During the transmission of DL PPDU, STA2 and STA3 (the first STA) have low-latency service data that need to be transmitted to the AP. STA2 and STA3 receive part or all of the DL PPDU within the AP's transmission opportunity and determine the end time of the DL PPDU based on the part or all of the DL PPDU. STA2 and STA3 send a PR signal to the AP at the first moment after the end time of the DL PPDU. The PR signal is an L-STF, which occupies 8μs in the time domain. The time interval between the first moment and the end time of the DL PPDU is 4μs.

[0162] After receiving the PR signal within its own transmission opportunity, the AP performs a BSRP (or NFRP) procedure (or STA2 / STA3) to determine the STA that sent the PR signal in order to identify the STA that sent the PR signal. The AP determines that the STA that sent the PR signal is STA2 and STA3, and sends a trigger frame to STA2 and / or STA3. The time interval between the BSRP transmission time and the PR signal end time is less than or equal to 16μs.

[0163] After receiving the trigger frame, STA2 and / or STA3 send uplink low-latency data to the AP. After receiving the low-latency data, the AP sends a BA to STA2 and / or STA3, and continues to send a DL PPDU to STA1 after the SIFS interval. The PHYSIG of the DL PPDU indicates that the PR signal can be sent within the AP's transmission opportunity, and also indicates that the PR signal cannot be sent within the first IFS after the DL PPDU ends.

[0164] exist Figure 6 In the illustrated embodiment, the PR signal uses L-STF, and the AP can determine the STA that sends the PR signal based on the BSRP or NFRP procedure.

[0165] Figure 7 A flowchart illustrating a communication method provided in an embodiment of this application. Figure 4 .like Figure 7 As shown, taking the PR signal as the first sequence, and with a BA after the first PPDU at an interval of SIFS, the method includes:

[0166] Within its own transmission opportunity, the AP sends a DL PPDU (first PPDU) to STA1 (second STA). The PHY SIG of the DL PPDU indicates that the PR signal can be sent within the AP's transmission opportunity, and also indicates that the PR signal can be sent within the first IFS after the DL PPDU ends. The first IFS is SIFS.

[0167] During the transmission of DL PPDU, STA2 and STA3 (the first STA) have low-latency service data that need to be transmitted to the AP. STA2 and STA3 receive part or all of the DL PPDU within the AP's transmission opportunity and determine the end time of the DL PPDU based on the part or all of the DL PPDU. STA2 and STA3 send PR signals to the AP at the first moment after the end time of the DL PPDU. The first sequence of the two PR signals occupies 4*Xμs in the time domain, where X is 1 or 2. The first sequences of the two PR signals are different, and the time interval between the first moment and the end time of the DL PPDU is 4μs.

[0168] After the DL PPDU ends, STA1 sends a BA to the AP at intervals of SIFS. If X is 1, that is, the first sequence of the two PR signals occupies 4μs in the time domain, then the time interval between the transmission time of the BA and the end time of the PR is 8μs; if X is 2, that is, the first sequence of the two PR signals occupies 8μs in the time domain, then the time interval between the transmission time of the BA and the end time of the PR is 4μs.

[0169] After receiving two different PR signals within its own transmission opportunity, the AP determines that STA2 and STA3 are sending the PR signals based on the sequence of the PR signals, and sends a trigger frame to STA2 and / or STA3.

[0170] After receiving the trigger frame, STA2 and / or STA3 send uplink low-latency data to the AP. After receiving the low-latency data, the AP sends a BA to STA2 and / or STA3, and continues to send a DL PPDU to STA1 after the SIFS interval. The PHYSIG of the DL PPDU indicates that the PR signal can be sent within the AP's transmission opportunity, and also indicates that the PR signal cannot be sent within the first IFS after the DL PPDU ends.

[0171] exist Figure 7 In the embodiment shown, the PR signal adopts a first sequence and the first IFS is SIFS. As long as the length of the PR signal in the time domain is less than or equal to 8μs, the first STA can send the PR signal within the transmission opportunity of the AP. The AP can determine the STA that sends the PR signal based on the first sequence of the PR signal.

[0172] Figure 8 A flowchart illustrating a communication method provided in an embodiment of this application. Figure 5 .like Figure 8 As shown, taking the PR signal as the second sequence as an example, the method includes:

[0173] The AP sends a DL PPDU to STA1 (the second STA) within its own transmission opportunity. The PHY SIG of the DL PPDU indicates that the PR signal can be sent within the AP's transmission opportunity, and also indicates that the PR signal can be sent within the first IFS after the DL PPDU ends. The first IFS is the PIFS.

[0174] During the transmission of DL PPDU, STA2 and STA3 (the first STA) have low-latency service data that need to be transmitted to the AP. STA2 and STA3 receive part or all of the DL PPDU within the AP's transmission opportunity and determine the end time of the DL PPDU based on the part or all of the DL PPDU. STA2 and STA3 send PR signals to the AP at the first moment after the end time of the DL PPDU. The second sequence of the two PR signals occupies 8+4*Xμs in the time domain, where X is 1 or 2. The second sequences of the two PR signals are different (i.e., the first sequences that make up the second sequences are different). The time interval between the first moment and the end time of the DL PPDU is 4μs.

[0175] After receiving two different PR signals within its own transmission opportunity, the AP determines that STA2 and STA3 are sending the PR signals based on the sequence of the PR signals, and sends a trigger frame to STA2 and / or STA3. The time interval between the time of sending the trigger frame and the time of the end of the PR signal is less than or equal to 16μs.

[0176] After receiving the trigger frame, STA2 and / or STA3 send uplink low-latency data to the AP. After receiving the low-latency data, the AP sends a Block Acknowledge (BA) to STA2 and / or STA3, and continues to send a DL PPDU to STA1 after the SIFS interval. The PHY SIG of the DL PPDU indicates that the PR signal can be sent within the AP's transmission opportunity, and also indicates that the PR signal cannot be sent within the first IFS after the DL PPDU ends.

[0177] exist Figure 8 In the illustrated embodiment, the PR signal uses a second sequence (obtained by combining the L-STF and the first sequence). The AP can determine the STA that sent the PR signal based on the second sequence of the PR signal. If the AP configures the same first sequence for multiple STAs, when the AP receives a PR signal with a sequence including the first sequence, it can perform an NFRP or BSRP procedure with the multiple STAs to determine the STA that sent the PR signal.

[0178] Figure 9 A flowchart illustrating a communication method provided in an embodiment of this application. Figure 6 .like Figure 9As shown, taking the PR signal as the first sequence as an example, the method includes:

[0179] STA1 (the second STA) sends a UL PPDU to the AP within its own transmission opportunity. The PHY SIG of the UL PPDU indicates that the PR signal can be sent within the transmission opportunity of STA1, and also indicates that the PR signal can be sent within the first IFS after the UL PPDU ends. The first IFS is SIFS.

[0180] During the transmission of UL PPDU, STA2 and STA3 (the first STA) have low-latency service data that need to be transmitted to the AP. STA2 and STA3 receive part or all of the UL PPDU within the transmission opportunity of STA1, and determine the end time of the UL PPDU based on the part or all of the UL PPDU. STA2 and STA3 send PR signals to the AP at the first moment after the end time of the UL PPDU. The first sequence of the two PR signals occupies 4*Xμs in the time domain, where X is 1 or 2. The first sequences of the two PR signals are different, and the time interval between the first moment and the end time of the UL PPDU is 4μs.

[0181] After receiving two different PR signals within STA1's transmission opportunity, the AP sends a BA to STA1 within STA1's transmission opportunity. The BA instructs STA1 to stop subsequent transmission, and its transmission opportunity is preempted by the AP. If X is 1, meaning the first sequence of the two PR signals occupies 4μs in the time domain, then the time interval between the transmission time of BA and the end time of PR is 8μs. If X is 2, meaning the first sequence of the two PR signals occupies 8μs in the time domain, then the time interval between the transmission time of BA and the end time of PR is 4μs. The AP determines that STA2 and STA3 are sending the PR signals based on the sequence of the PR signals, and sends a trigger frame to STA2 and / or STA3 within the AP's transmission opportunity.

[0182] After receiving the trigger frame, STA2 and / or STA3 send uplink low-latency data to the AP; after receiving the low-latency data, the AP sends a BA to STA2 and / or STA3.

[0183] exist Figure 9 In the embodiment shown, the PR signal adopts a first sequence, and the first transmission opportunity is the transmission opportunity of the second STA. As long as the length of the PR signal in the time domain is less than or equal to 8μs, the first STA can send a preemption request signal within the transmission opportunity of the second STA.

[0184] Figure 10 This is a schematic diagram of a communication device provided in an embodiment of this application. Figure 10 As shown, the device 10 includes a receiving module 11 and a transmitting module 12:

[0185] Receiver module 11 is used to receive part or all of the first PPDU;

[0186] The sending module 12 is used to send a preemption request signal at the first moment after the first PPDU ends. The preemption request signal includes: L-STF, a first sequence or a second sequence, wherein the second sequence is obtained by combining L-STF and the first sequence.

[0187] In one possible implementation, the first sequence occupies X symbols in the time domain, where X is a positive integer, X is predefined, or X is indicated by a first PPDU or management frame.

[0188] In one possible implementation, X is 1 or 2.

[0189] In one possible implementation, the first sequence is one of the following sequences:

[0190] ZC sequence, golden sequence, M sequence, Walsh sequence.

[0191] In one possible implementation, the first sequence is modulated onto the carrier using orthogonal frequency division multiplexing (OFDM).

[0192] In one possible implementation, the receiving module 11 is further configured to:

[0193] Receive configuration information, which includes a first sequence.

[0194] In one possible implementation, the device 10 further includes a transmitting module, which is used to:

[0195] Send an association request, which includes an indication of low-latency service requirements.

[0196] In one possible implementation, the receiving module 11 is specifically used for:

[0197] Receive part or all of the first PPDU within the first transmission opportunity; be located within the first transmission opportunity at the first moment;

[0198] The first transmission opportunity is either a transmission opportunity of an access point station or a transmission opportunity of a second non-access point station; wherein, the access point station is connected to the first non-access point station, the second non-access point station is another non-access point station connected to the access point station connected to the first non-access point station, and the first non-access point station is the device that sends the preemption request signal.

[0199] In one possible implementation, the first PPDU is used to indicate permission to send a preemption request signal within the first transmission opportunity.

[0200] In one possible implementation, the receiving module 11 is further configured to:

[0201] Receive indication information, which indicates that a preemption request signal may be sent within a transmission opportunity of any site within the Basic Service Set (BSS) of the access point site, including the access point site or the second non-access point site.

[0202] In one possible implementation, the first moment is located within the first inter-frame interval (IFS) after the first PPDU ends. The first IFS is either the Point Coordination Function Inter-Frame Interval (PIFS) or the Short Inter-Frame Interval (SIFS).

[0203] In one possible implementation, the first PPDU is also used to indicate that a preemption request signal is permitted to be sent within the first IFS.

[0204] In one possible implementation, when the Media Access Control Protocol Data Unit (MPDU) in the first PPDU requires acknowledgment or block acknowledgment, the first IFS is SIFS, and the preemption request signal includes L-STF or a first sequence.

[0205] In one possible implementation, the time interval between the first moment and the end moment of the first PPDU is 4 μs.

[0206] The communication device 10 can execute the steps performed by the first STA in the above method embodiment. Its implementation principle and beneficial effects are similar, and will not be described again here.

[0207] Figure 11 This is a schematic diagram of another communication device provided in an embodiment of this application. Figure 11 As shown, the device 20 includes a transmission module 21 and a receiving module 22, wherein,

[0208] Transmission module 21 is used to transmit the first PPDU;

[0209] The receiving module 22 is configured to receive at least one preemption request signal after the first PPDU ends. Each preemption request signal includes an L-STF, a first sequence, or a second sequence, wherein the second sequence is obtained by combining the L-STF and the first sequence.

[0210] In one possible implementation, the first sequence included in at least one preemption request signal is different.

[0211] In one possible implementation, for any preemption request signal, if the first sequence included in the preemption request signal is configured to N non-access point sites, then the device 20 further includes a determining module, which is used to:

[0212] The process involves querying the empty data protocol data unit feedback report or the buffer status report with N non-access point sites to determine the non-access point site that sent the preemption request signal. N is a positive integer greater than or equal to 2.

[0213] In one possible implementation, for any preemption request signal, if the preemption request signal is L-STF, the determining module is further configured to:

[0214] The system performs a null data protocol data unit feedback report query process or a buffer status report query process with all non-access point sites within the basic service set (BSS) of the access point site, or with all non-access point sites whose associated requests include low-latency service requirements, to determine the non-access point site that sent the preemption request signal.

[0215] In one possible implementation, the first sequence occupies X symbols in the time domain, where X is a positive integer, X is predefined, or X is indicated by a first PPDU or management frame.

[0216] In one possible implementation, X is 1 or 2.

[0217] In one possible implementation, the first sequence is one of the following sequences:

[0218] ZC sequence, golden sequence, M sequence, Walsh sequence.

[0219] In one possible implementation, the device 20 further includes a configuration module, which is used for:

[0220] Configure a first sequence based on the service requirements of at least one device that sends a preemption request signal.

[0221] In one possible implementation, the receiving module 22 is specifically used for:

[0222] At least one preemption request signal is received during the first transmission opportunity, which is either a transmission opportunity of an access point site or a transmission opportunity of a second non-access point site.

[0223] In this configuration, an access point site is connected to at least one first non-access point site, a second non-access point site is another non-access point site connected to the access point site connected to at least one first non-access point site, and at least one first non-access point site is at least one device that sends a preemption request signal.

[0224] In one possible implementation, the first PPDU is used to indicate that a preemption request signal is permitted to be sent within the first transmission opportunity.

[0225] In one possible implementation, the device 20 further includes a transmitting module, which is used to:

[0226] Send an instruction message that instructs any site within the BSS of the access point site to send a preemption request signal during a transmission opportunity. The site may include the access point site or a second non-access point site.

[0227] In one possible implementation, the first PPDU is also used to indicate that a preemption request signal is allowed to be sent within the first inter-frame interval (IFS) after the first PPDU ends. The first IFS is either the Point Coordination Function Inter-Frame Interval (PIFS) or the Short Inter-Frame Interval (SIFS).

[0228] In one possible implementation, when the Media Access Control Protocol Data Unit (MPDU) in the first PPDU requires acknowledgment or block acknowledgment, the first IFS is SIFS, and the preemption request signal is L-STF or the first sequence.

[0229] The communication device 20 can execute the steps executed by the AP in the above method embodiment. Its implementation principle and beneficial effects are similar, and will not be described again here.

[0230] Figure 12 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Please refer to... Figure 12 The electronic device 30 may include a transceiver 31, a memory 32, and a processor 33. The transceiver 31 may include a transmitter and / or a receiver. The transmitter may also be referred to as a transmitter, transmitter port, or transmitter interface, etc., and the receiver may also be referred to as a receiver, receiver port, or receiver interface, etc. Exemplarily, the transceiver 31, memory 32, and processor 33 are interconnected via a bus 34.

[0231] Memory 32 is used to store program instructions;

[0232] The processor 33 is used to execute the program instructions stored in the memory, so that the electronic device 30 performs the steps executed by the AP or the steps executed by the first STA in the above method embodiment.

[0233] The transceiver 31 is used to perform the transmission and reception functions of the electronic device 30 in the above communication method.

[0234] Electronic devices can include chips, modules, integrated development environments (IDEs), etc.

[0235] The electronic device 30 can execute the steps executed by the AP or the first STA in the above method embodiment. The implementation principle and beneficial effects are similar, and will not be repeated here.

[0236] This application provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a computer, cause any of the aforementioned communication methods to be executed.

[0237] This application embodiment may also provide a computer program product that can be executed by a processor, such that when the computer program product is executed by a computer, the communication method described above is executed.

[0238] All or part of the steps of the above method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a readable memory. When the program is executed, it performs the steps of the above method embodiments; and the aforementioned memory (storage medium) includes: read-only memory (ROM), random access memory (RAM), flash memory, hard disk, solid-state drive, magnetic tape, floppy disk, optical disk, and any combination thereof.

[0239] This application describes embodiments with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processing unit of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processing unit of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0240] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0241] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0242] Obviously, those skilled in the art can make various modifications and variations to the embodiments of this application without departing from the spirit and scope of this application. Therefore, if these modifications and variations to the embodiments of this application fall within the scope of the claims of this application and their equivalents, this application also intends to include these modifications and variations.

Claims

1. A communication method, characterized in that, include: Receive part or all of the first physical layer protocol data unit (PPDU); At the first moment after the first PPDU ends, a preemption request signal is sent. The preemption request signal includes: a traditional short training field L-STF, a first sequence or a second sequence. The second sequence is obtained by combining L-STF and the first sequence. The first sequence occupies X symbols in the time domain. X is a positive integer. X is predefined or indicated by the first PPDU or management frame. X is 1 or 2. The first time point is located within the first inter-frame interval (IFS) after the first PPDU ends. The first IFS is either the Point Coordination Function Inter-Frame Interval (PIFS) or the Short Inter-Frame Interval (SIFS). When the Media Access Control Protocol Data Unit (MPDU) in the first PPDU requires acknowledgment or block acknowledgment, the first IFS is the SIFS, and the preemption request signal includes the L-STF or the first sequence.

2. The method according to claim 1, characterized in that, The first sequence is one of the following sequences: ZC sequence, golden sequence, M sequence, Walsh sequence.

3. The method according to claim 1 or 2, characterized in that, The first sequence is modulated onto the carrier using orthogonal frequency division multiplexing (OFDM).

4. The method according to claim 1 or 2, characterized in that, The method further includes: Receive configuration information, which includes the first sequence.

5. The method according to claim 1, characterized in that, The method further includes: Send an association request, which includes an indication of low-latency service requirements.

6. The method according to claim 1, characterized in that, Receiving part or all of the first PPDU includes: Receive part or all of the first PPDU within the first transmission opportunity; the first moment is within the first transmission opportunity. The first transmission opportunity is either a transmission opportunity of an access point station or a transmission opportunity of a second non-access point station; wherein, the access point station is connected to the first non-access point station, the second non-access point station is another non-access point station connected to the access point station connected to the first non-access point station, and the first non-access point station is the device that sends the preemption request signal.

7. The method according to claim 6, characterized in that, The first PPDU is used to indicate that a preemption request signal is permitted to be sent within the first transmission opportunity.

8. The method according to claim 6, characterized in that, The method further includes: The system receives an instruction message indicating that it is permitted to send a preemption request signal during a transmission opportunity at any site within the Basic Service Set (BSS) of the access point site, where any site within the BSS includes the access point site or the second non-access point site.

9. The method according to claim 1, characterized in that, The first PPDU is also used to indicate that a preemption request signal is permitted to be sent within the first IFS.

10. The method according to claim 1, characterized in that, The time interval between the first time point and the end time of the first PPDU is 4 μs.

11. A communication method, characterized in that, include: Transmit the first physical layer protocol data unit (PPDU); After the first PPDU ends, at least one preemption request signal is received. Each preemption request signal includes a traditional short training field L-STF, a first sequence or a second sequence. The second sequence is obtained by combining the L-STF and the first sequence. The first sequence occupies X symbols in the time domain, where X is a positive integer. X is predefined, or X is indicated by the first PPDU or management frame, where X is 1 or 2. The first PPDU is also used to indicate that a preemption request signal is allowed to be sent within the first inter-frame interval (IFS) after the first PPDU ends. The first IFS is either the Point Coordination Function Inter-Frame Interval (PIFS) or the Short Inter-Frame Interval (SIFS). When the Media Access Control Protocol Data Unit (MPDU) in the first PPDU requires acknowledgment or block acknowledgment, the first IFS is the SIFS, and the preemption request signal is the L-STF or the first sequence.

12. The method according to claim 11, characterized in that, The first sequence included in at least two preemption request signals is different.

13. The method according to claim 11, characterized in that, For any preemption request signal, if the first sequence included in the preemption request signal is configured to N non-access point sites, then a null data protocol data unit feedback report query process or a buffer status report query process is performed with the N non-access point sites to determine the non-access point site that sent the preemption request signal, where N is a positive integer greater than or equal to 2.

14. The method according to claim 11, characterized in that, For any preemption request signal, if the preemption request signal is the L-STF, then a null data protocol data unit feedback report query process or a buffer status report query process is performed with all non-access point sites in the basic service set (BSS) of the access point site or all non-access point sites whose associated requests include low latency service requirement indications, to determine the non-access point site that sent the preemption request signal.

15. The method according to any one of claims 11-14, characterized in that, The first sequence is one of the following sequences: ZC sequence, golden sequence, M sequence, Walsh sequence.

16. The method according to claim 11, characterized in that, The method further includes: Configure the first sequence according to the service requirements of the at least one preemption request signal sending device.

17. The method according to claim 11, characterized in that, Receiving at least one preemption request signal includes: The first transmission opportunity is a transmission opportunity of an access point site or a transmission opportunity of a second non-access point site. Wherein, the access point site is connected to at least one first non-access point site, the second non-access point site is another non-access point site connected to the access point site connected to at least one first non-access point site, and the at least one first non-access point site is the sending device of the at least one preemption request signal.

18. The method according to claim 17, characterized in that, The first PPDU is used to indicate that a preemption request signal is permitted to be sent within the first transmission opportunity.

19. The method according to claim 17, characterized in that, The method further includes: Sending indication information, the indication information instructing to send a preemption request signal within the transmission opportunity of any site within the Basic Service Set (BSS) of the access point site, wherein any site within the Basic Service Set (BSS) includes the access point site or the second non-access point site.

20. A communication device, characterized in that, include: The receiving module is used to receive part or all of the first physical layer protocol data unit (PPDU). The sending module is used to send a preemption request signal at the first moment after the first PPDU ends. The preemption request signal includes: a traditional short training field L-STF, a first sequence or a second sequence, wherein the second sequence is obtained by combining L-STF and the first sequence, and the first sequence occupies X symbols in the time domain, wherein X is a positive integer, X is predefined, or X is indicated by the first PPDU or management frame, wherein X is 1 or 2. The first time point is located within the first inter-frame interval (IFS) after the first PPDU ends. The first IFS is either the Point Coordination Function Inter-Frame Interval (PIFS) or the Short Inter-Frame Interval (SIFS). When the Media Access Control Protocol Data Unit (MPDU) in the first PPDU requires acknowledgment or block acknowledgment, the first IFS is the SIFS, and the preemption request signal includes the L-STF or the first sequence.

21. A communication device, characterized in that, include: The transmission module is used to transmit the first physical layer protocol data unit (PPDU). The receiving module is configured to receive at least one preemption request signal after the first PPDU ends. Each preemption request signal includes a conventional short training field L-STF, a first sequence, or a second sequence. The second sequence is obtained by combining the L-STF with the first sequence. The first sequence occupies X symbols in the time domain, where X is a positive integer. X is predefined, or X is indicated by the first PPDU or management frame, where X is 1 or 2. The first PPDU is also used to indicate that a preemption request signal is allowed to be sent within the first inter-frame interval (IFS) after the first PPDU ends. The first IFS is either the Point Coordination Function Inter-Frame Interval (PIFS) or the Short Inter-Frame Interval (SIFS). When the Media Access Control Protocol Data Unit (MPDU) in the first PPDU requires acknowledgment or block acknowledgment, the first IFS is the SIFS, and the preemption request signal is the L-STF or the first sequence.

22. An electronic device, characterized in that, include: Processor, memory; The memory stores computer-executed instructions; The processor executes computer execution instructions stored in the memory, causing the processor to perform the method as described in any one of claims 1-10, or the method as described in any one of claims 11-19.

23. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the method of any one of claims 1-10, or the method of any one of claims 11-19.

24. A computer program product, characterized in that, Includes a computer program that, when executed by a processor, implements the method of any one of claims 1-10, or the method of any one of claims 11-19.

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