Method and device for replying response frame, and access point AP system

Abstract

Disclosed are a method and apparatus for replying to a response frame, and an AP system. A radio frequency processing device receives a PPDU sent by a STA. The radio frequency processing device sends a frame obtained based on the PPDU to a baseband processing device via a wired medium, and the radio frequency processing device and the baseband processing device are remotely separated. The radio frequency processing device generates and sends a target field to an air interface in response to a target signal received from the baseband processing device via the wired medium. The target field includes at least the first field of a response frame of the PPDU. The target signal is used to instruct the radio frequency processing device to immediately respond to the PPDU. The baseband processing device modulates the target signal and transmits it on the wired medium to instruct the radio frequency processing device to immediately respond to the PPDU. After receiving the target signal, the radio frequency processing device immediately generates and sends the target field of the response frame to the air interface. This process has a low latency, which reduces the overall latency of the AP system replying to the response frame.

Description

Technical Field

[0001] The present application relates to the field of wireless communication technology, and in particular to a method and device for replying a response frame, and an access point (AP) system. Background Art

[0002] In a wireless local area network (WLAN), after an access point (AP) receives a medium access control (MAC) protocol data unit (MPDU) (also called a MAC frame) sent by a station (STA), it performs frame filtering based on the information in the MAC frame header and determines whether to reply with a response frame based on the cyclic redundancy code (CRC) check result. If the AP determines that a response frame is necessary, it must send a response frame over the air interface within a short interframe space (SIFS) from the end of the air interface of the MAC frame. In other words, the total time from the AP receiving the MAC frame to the AP sending the response frame must be less than one SIFS. The MAC frame is located in the data field of the physical layer protocol data unit (PPDU).

[0003] With the development of WLAN technology, the algorithms used for data transmission have become increasingly complex to improve WLAN system performance. Consequently, the time it takes for APs to parse MAC frames has increased. Furthermore, when WLAN systems adopt a distributed architecture, the AP's baseband unit and radio frequency unit are remotely separated and connected via wired media. This distributed architecture also introduces additional transmission latency in the remote segment. Consequently, the AP may not be able to reply with a response frame within one SIFS of the MAC frame's air interface end time. Summary of the Invention

[0004] This application provides a method and device for replying a response frame, and an access point (AP) system. The technical solution is as follows:

[0005] In a first aspect, a method for replying to a response frame is provided. The method includes: a radio frequency processing device receives a PPDU sent by a STA. The radio frequency processing device then transmits a frame obtained based on the PPDU to a baseband processing device via a wired medium, wherein the radio frequency processing device is remotely separated from the baseband processing device. In response to a target signal received from the baseband processing device via the wired medium, the radio frequency processing device generates and transmits a target field over an air interface. The target field includes at least the first field of a response frame of the PPDU. The target signal is used to instruct the radio frequency processing device to immediately respond to the PPDU.

[0006] In the present application, the baseband processing device sends a target signal to the RF processing device via a wired medium indicating that an immediate response to the PPDU is required. After receiving the target signal, the RF processing device immediately generates and sends to the air interface the target domain of the first domain in the response frame containing the PPDU. Since the process of the baseband processing device generating and transmitting the response frame via a wired medium is relatively complicated, the present application does not require the baseband processing device to generate the first domain of the response frame, thereby reducing the processing delay of the response frame by the baseband processing device. The RF processing device immediately generates and sends the target domain to the air interface after receiving the target signal, which can improve the efficiency of the RF processing device in sending response frames to the air interface.

[0007] Optionally, the RF processing device receives the portion of the response frame of the PPDU excluding the target domain from the baseband processing device through a wired medium; then, the RF processing device sends the portion of the response frame of the PPDU excluding the target domain to the air interface immediately following the target domain.

[0008] Optionally, the target signal is a single-frequency signal. The radio frequency processing device may filter the signal from the baseband processing device according to the frequency of the target signal to obtain the target signal.

[0009] Optionally, the signal for transmitting the frame obtained based on the PPDU and the signal for transmitting the response frame of the PPDU other than the target domain between the RF processing device and the baseband processing device are both broadband signals, and the target signal and the broadband signal are superimposed and transmitted. Among them, the signal for transmitting the frame obtained based on the PPDU and the signal for transmitting the response frame of the PPDU other than the target domain are both transmitted based on the wired communication protocol. In this application, the transmission signals based on the wired communication protocol between the RF processing device and the baseband processing device are both broadband signals.

[0010] Optionally, the wired medium includes one or more pairs of signal lines, the broadband signal is a differential signal, and the target signal is a common-mode signal. The RF processing device performs superposition processing on the signal on the first signal line and the signal on the second signal line to obtain the target signal, and the first signal line and the second signal line form a pair of signal lines for transmitting the target signal.

[0011] Optionally, the target domain includes a traditional short training domain and a traditional long training domain in sequence.

[0012] In this application, since the L-STF and L-LTF of the response frames of different PPDUs or different types of response frames are usually the same, the RF processing device does not need to know the type of the response frame. It can immediately generate and send the target field of the response frame to the air interface only under the instruction of the target signal, thereby enabling the AP system to reply to the response frame within one SIFS from the end time of the air interface of the PPDU.

[0013] Optionally, the target signal is obtained by OOK modulation.

[0014] In a second aspect, a method for replying to a response frame is provided. The method includes: a baseband processing device receives a frame from a radio frequency processing device via a wired medium, the frame being obtained based on a physical layer protocol data unit (PPDU) sent by a station (STA), and the radio frequency processing device is remotely separated from the baseband processing device. When the baseband processing device determines based on the frame that a response frame needs to be replied to the STA, the baseband processing device generates a target signal, the target signal being used to instruct the radio frequency processing device to immediately respond to the PPDU. The baseband processing device then sends the target signal to the radio frequency processing device via the wired medium.

[0015] In the present application, the baseband processing device sends a target signal to the radio frequency processing device through a wired medium, indicating that an immediate response to the PPDU is required. After receiving the target signal, the radio frequency processing device immediately generates and sends the target domain of the first domain in the response frame containing the PPDU to the air interface. Since the process of the baseband processing device generating and transmitting the response frame through a wired medium is relatively complicated, the present application does not require the baseband processing device to generate the first domain of the response frame, thereby reducing the processing delay of the response frame by the baseband processing device. The radio frequency processing device immediately generates and sends the target domain to the air interface after receiving the target signal, which can improve the efficiency of the radio frequency processing device in sending response frames to the air interface. In addition, the baseband processing device does not need to generate the target domain of the response frame, thereby saving the processing resources of the baseband processing device.

[0016] Optionally, the baseband processing device generates a portion of the PPDU response frame excluding a target field, where the target field includes at least a first field of the PPDU response frame. The baseband processing device sends the portion of the PPDU response frame excluding the target field to the radio frequency processing device via a wired medium.

[0017] Optionally, the target signal is a single-frequency signal.

[0018] Optionally, the signal used to transmit the frame obtained based on the PPDU and the signal used to transmit the portion of the response frame of the PPDU excluding the target field between the RF processing device and the baseband processing device are both broadband signals. The implementation process of the baseband processing device sending the target signal to the RF processing device through the wired medium includes:

[0019] The baseband processing device couples the target signal to the wired medium so that the target signal is superimposed on the broadband signal for transmission.

[0020] Optionally, the wired medium includes one or more pairs of signal lines, and the baseband processing device couples the target signal to the wired medium, including:

[0021] The baseband processing device couples a target signal to at least one pair of signal lines, wherein the broadband signal is a differential signal and the target signal on each pair of signal lines is a common-mode signal; or, alternatively, the broadband signal is a common-mode signal and the target signal on each pair of signal lines is a differential signal.

[0022] In the present application, when the baseband processing device couples the target signal to multiple pairs of signal lines for transmission, the radio frequency processing device can combine the filtered signals on the multiple pairs of signal lines and determine whether the target signal is received based on the combined signal.

[0023] Optionally, the target signal is obtained by OOK modulation.

[0024] In a third aspect, a radio frequency processing device is provided. The device includes multiple functional modules that interact with each other to implement the method of the first aspect and its respective embodiments. The multiple functional modules can be implemented based on software, hardware, or a combination of software and hardware, and the multiple functional modules can be arbitrarily combined or divided based on the specific implementation.

[0025] In a fourth aspect, a baseband processing device is provided. The device includes multiple functional modules that interact with each other to implement the method of the second aspect and its respective embodiments. The multiple functional modules can be implemented based on software, hardware, or a combination of software and hardware, and the multiple functional modules can be arbitrarily combined or divided based on the specific implementation.

[0026] In a fifth aspect, a radio frequency processing device is provided, comprising: a processor and a communication interface, wherein the communication interface comprises a wireless communication interface and a wired communication interface;

[0027] The processor is configured to call a computer program to implement the method for replying a response frame according to any one of the first aspects;

[0028] The processor is configured to perform information interaction with the station STA through the wireless communication interface, and to perform information interaction with the baseband processing device through the wired communication interface.

[0029] In a sixth aspect, a baseband processing device is provided, comprising: a processor and a communication interface;

[0030] The processor is configured to call a computer program to implement the method for replying a response frame as described in any one of the second aspects;

[0031] The processor is configured to perform information interaction with the radio frequency processing device through the communication interface.

[0032] In a seventh aspect, an AP system is provided, comprising: a baseband processing device and a radio frequency processing device, wherein the baseband processing device and the radio frequency processing device are connected via a wired medium, and the baseband processing device and the radio frequency processing device are remotely separated;

[0033] The baseband processing device is the baseband processing device described in the fourth aspect or the sixth aspect; the radio frequency processing device is the radio frequency processing device described in the third aspect or the fifth aspect.

[0034] In an eighth aspect, a computer storage medium is provided, on which instructions are stored. When the instructions are executed by a processor of a computer device, the method in the above-mentioned first aspect and its various embodiments is implemented, or the method in the above-mentioned second aspect and its various embodiments is implemented.

[0035] In the ninth aspect, a chip is provided, which includes a programmable logic circuit and / or program instructions. When the chip is running, it implements the method in the above-mentioned first aspect and its various embodiments or implements the method in the above-mentioned second aspect and its various embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic diagram of the structure of an AP system provided in an embodiment of the present application;

[0037] Figure 2 This is a schematic diagram of the structure of a baseband processing device provided in an embodiment of the present application;

[0038] Figure 3 This is a schematic structural diagram of a radio frequency processing device provided in an embodiment of the present application;

[0039] Figure 4 This is a flow chart of a method for replying a response frame provided in an embodiment of the present application;

[0040] Figure 5This is a schematic diagram of the transmission relationship between a target signal and a bandwidth signal on a pair of signal lines provided by an embodiment of the present application;

[0041] Figure 6 This is a schematic diagram of the structure of a PPDU response frame provided in an embodiment of the present application;

[0042] Figure 7 This is a schematic structural diagram of a target signal sending processing unit provided in an embodiment of the present application;

[0043] Figure 8 This is a schematic structural diagram of a target signal receiving and processing unit provided in an embodiment of the present application;

[0044] Figure 9 This is a schematic structural diagram of another target signal sending processing unit provided in an embodiment of the present application;

[0045] Figure 10 This is a schematic structural diagram of another target signal receiving and processing unit provided in an embodiment of the present application;

[0046] Figure 11 This is a schematic structural diagram of a radio frequency processing device provided in an embodiment of the present application;

[0047] Figure 12 is a structural diagram of another radio frequency processing device provided in an embodiment of the present application;

[0048] Figure 13 This is a schematic diagram of the structure of a baseband processing device provided in an embodiment of the present application;

[0049] Figure 14 This is a block diagram of a radio frequency processing device provided in an embodiment of the present application;

[0050] Figure 15 This is a block diagram of a baseband processing device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0051] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0052] Figure 1 This is a schematic diagram of the structure of an AP system provided in an embodiment of the present application. Figure 1As shown, the AP system includes a baseband processing device 101 and RF processing devices 102A-102C (collectively referred to as RF processing devices 102). Baseband processing device 101 and RF processing device 102 are connected via a wired medium. In this embodiment of the present application, baseband processing device 101 and RF processing device 102 are remotely connected, i.e., the wired medium is not a trace on or between circuit boards. Optionally, the wired medium is a network cable or an optical fiber composite cable. Figure 1 The number of RF processing devices is only used as an example and is not intended to limit the AP system provided in the embodiments of the present application. The AP system may also include one, two, or more RF processing devices.

[0053] The baseband processing device 101 primarily performs MAC processing and a portion of baseband processing. The RF processing device 102 primarily performs RF processing and another portion of baseband processing. Communication between the baseband processing device 101 and the RF processing device 102 is based on a wired communication protocol. This wired communication protocol can utilize an Ethernet physical protocol. The baseband processing device 101 and the RF processing device 102 jointly implement the AP functionality. Optionally, the IF chip / circuit is integrated into the RF processing device 102, or the IF chip / circuit is deployed separately.

[0054] Optionally, Figure 2 This is a schematic diagram of the structure of a baseband processing device provided by an embodiment of the present application. Figure 2 As shown, the baseband processing device 101 includes a MAC processing unit, a WLAN physical layer (PHY) processing unit, a remote interface group / deframing unit, a serial interface, an Ethernet PHY unit, and a target signal transmission processing unit. The MAC processing unit is used to complete MAC processing. The WLAN PHY processing unit is used to complete part of the baseband processing. The remote interface group / deframing unit is used to compose frames sent to the radio frequency processing device and decompose frames from the radio frequency processing device. The serial interface is used to implement communication between WLAN and Ethernet. The Ethernet PHY unit is used to process frames sent and received via a wired medium. The target signal transmission processing unit is connected to the MAC processing unit and is used to generate and send a target signal to the radio frequency processing device via a wired medium when the MAC processing unit determines that a PPDU sent by the STA needs to be replied. The MAC processing unit and the WLAN PHY processing unit are integrated into the same WLAN chip, or the MAC processing unit and the WLAN PHY processing unit are two separate WLAN chips. The Ethernet PHY unit is an Ethernet chip.

[0055] Optionally, Figure 3 This is a schematic diagram of the structure of a radio frequency processing device provided in an embodiment of the present application. Figure 3As shown, the RF processing device 102 includes a target signal reception processing unit, an Ethernet PHY unit, a serial interface, a remote interface group / deframing unit, a WLAN processing unit, RF front-end modules (FEMs), and an antenna assembly. The target signal reception processing unit is connected to the WLAN processing unit and is configured to receive and process signals from the baseband processing device via a wired medium. Upon determining receipt of the target signal, it transmits an immediate response indication to the WLAN processing unit. The WLAN processing unit is configured to perform portions of baseband and RF processing. For example, upon receiving the immediate response indication transmitted by the target signal reception processing unit, it immediately generates a target field containing the first field of a response frame and immediately transmits the target field to the antenna assembly via the RF FEM. The Ethernet PHY unit is configured to process frames transmitted and received via the wired medium. The serial interface is configured to facilitate communication between the WLAN and Ethernet. The remote interface group / deframing unit is configured to compose frames sent to the baseband processing device and decompose frames received from the baseband processing device. The antenna assembly is configured to transmit and receive PPDUs over the air interface. The Ethernet PHY unit is an Ethernet chip, and the WLAN processing unit is a WLAN chip.

[0056] like Figure 2 The baseband processing equipment shown and Figure 3 The RF processing devices shown are connected by network cables. Figure 2 and Figure 3 For the Ethernet PHY unit in the baseband processing device, the baseband processing device and the radio frequency processing device are connected by an optical-electrical composite cable.

[0057] Figure 4 This is a flow chart of a method for replying a response frame provided by an embodiment of the present application. This method can be applied to Figure 1 The AP system shown in Figure 1 is as follows. Figure 4 As shown, the method includes:

[0058] Step 401: A radio frequency processing device receives a PPDU sent by a STA.

[0059] The STA is any STA in the WLAN where the AP system is located. The data field of the PPDU carries the physical layer payload, which can be called a physical layer service data unit (PSDU). The MAC frame is located in the data field of the PPDU. The MAC frame contains data, control signaling, or management signaling.

[0060] Step 402: The radio frequency processing device sends a frame obtained based on the PPDU to the baseband processing device through a wired medium.

[0061] Optionally, the structure of the radio frequency processing device is as follows Figure 3After receiving the PPDU sent by the STA from the air interface via the RF FEM and antenna assembly, the RF processing device processes the PPDU through the WLAN processing unit. The remote interface assembly / de-framing unit then frames the PPDU to obtain a frame based on the PPDU. The frame is then transmitted to the Ethernet PHY unit via the serial interface. After processing by the Ethernet PHY unit, it is transmitted to the baseband processing device via a wired medium.

[0062] Step 403: When the baseband processing device determines based on the frame that a response frame needs to be sent to the STA, the baseband processing device generates a target signal.

[0063] The target signal is used to instruct the RF processing device to immediately respond to the PPDU. The baseband processing device determines that a response frame needs to be sent to the STA based on the frame. That is, the baseband processing device determines that a response frame of the PPDU needs to be sent to the STA based on the PPDU.

[0064] Optionally, the structure of the baseband processing device is as follows: Figure 2 As shown. The baseband processing device receives the frame from the RF processing device through a wired medium, and after being processed by the Ethernet PHY unit, the frame is transmitted to the remote interface group / deframing unit through the serial interface. The remote interface group / deframing unit then deframes the frame and transmits it to the WLAN PHY processing unit. After completing the WLAN PHY layer reception processing, the WLAN PHY processing unit reports the decoding result to the MAC processing unit. The MAC processing unit performs frame filtering based on the information in the MAC frame header and determines whether to reply to the response frame based on the CRC check result. After determining that a response frame needs to be replied, the MAC processing unit transmits an immediate response indication to the target signal sending processing unit. The target signal sending processing unit generates a target signal based on the received immediate response indication.

[0065] Optionally, the target signal is a single-frequency signal. A single-frequency signal refers to a signal with only one frequency. The embodiment of the present application does not limit the frequency of the target signal, and only needs to ensure that it can be distinguished from other signals.

[0066] Optionally, the target signal is obtained by adopting on-off keying (OOK) modulation.

[0067] Step 404: The baseband processing device sends the target signal to the radio frequency processing device through a wired medium.

[0068] Optionally, the transmission signal between the baseband processing device and the radio frequency processing device based on the wired communication protocol is a broadband signal. For example, the signal used to transmit the frame obtained based on the PPDU in the above step 402 and the signal of the response frame of the PPDU other than the target domain in the following step 407 are both broadband signals. A broadband signal refers to a signal whose bandwidth is close to or greater than the center frequency (i.e., a non-narrowband signal). The implementation process of step 404 includes: the baseband processing device couples the target signal to a wired medium so that the target signal and the broadband signal are superimposed and transmitted. The wired communication interface on the baseband processing device connected to the wired medium is connected to a coupler or integrated with a coupler, and the coupler couples the target signal output by the target signal sending processing unit to the wired medium for transmission. The wired communication interface can be, for example, an RJ45 interface.

[0069] Optionally, the wired medium includes one or more pairs of signal lines. For example, a network cable typically includes four twisted pairs, each twisted pair serving as a pair of signal lines. Signals transmitted between the baseband processing device and the RF processing device based on a wired communication protocol are transmitted as differential signals or common-mode signals over the paired signal lines. The baseband processing device couples the target signal to at least one pair of signal lines.

[0070] In an embodiment of the present application, the baseband processing device can couple the target signal to multiple pairs of signal lines respectively, so that the target signal is transmitted on each pair of signal lines, thereby improving the reception reliability of the target signal by the radio frequency processing device.

[0071] Optionally, the broadband signal is a differential signal, and the target signal on each pair of signal lines is a common-mode signal; or, the broadband signal is a common-mode signal, and the target signal on each pair of signal lines is a differential signal. For example, Figure 5 Schematic diagram of the transmission relationship between a target signal and a bandwidth signal on a pair of signal lines provided by an embodiment of the present application. Figure 5 As shown, the pair of signal lines includes signal line 1 and signal line 2. The broadband signal is transmitted as a differential signal, and the target signal is transmitted as a common-mode signal. The horizontal axis represents frequency. The target signal is a single-frequency signal.

[0072] Step 405: The radio frequency processing device generates a target field of a response frame of the PPDU in response to the target signal and sends it to the air interface.

[0073] The target field includes at least the first field of the PPDU response frame. As defined in the Institute of Electrical and Electronics Engineers (IEEE) 802.11 series of protocols, the first field of the PPDU response frame is the legacy short training field (L-STF).

[0074] Optionally, the target field includes an L-STF and a legacy long training field (L-LTF) in sequence. The embodiment of the present application provides the following two implementations of a radio frequency processing device generating and sending the target field to an air interface.

[0075] In the first implementation, the radio frequency processing device stores the time-domain discrete signals of the L-SIF and L-LTF. Upon receiving an immediate response indication from the target signal reception processing unit, the WLAN processing unit of the radio frequency processing device immediately reads the corresponding L-SIF and L-LTF time-domain discrete signals according to the bandwidth. The device then performs time-domain processing, digital-to-analog conversion, intermediate frequency processing, and radio frequency processing on the read time-domain discrete signals. Finally, the processed signals are transmitted to the air interface via the antenna assembly.

[0076] In the second implementation, the radio frequency processing device stores the L-SIF sequence and L-LTF sequence (as specified in the standard). Upon receiving an immediate response indication from the target signal reception processing unit, the WLAN processing unit of the radio frequency processing device immediately reads the L-SIF sequence and L-LTF sequence. The WLAN processing unit then sequentially performs frequency domain processing, inverse discrete Fourier transform processing, time domain processing, digital-to-analog conversion, intermediate frequency processing, and radio frequency processing on the read L-SIF sequence and L-LTF sequence. Finally, the processed signal is transmitted to the air interface via the antenna assembly.

[0077] Both implementations above use the example of an IF circuit integrated into the WLAN processing unit of a radio frequency processing device. If the IF circuit is deployed separately, the WLAN processing unit does not perform IF processing in the above implementations; the IF processing is performed by the separately deployed IF circuit.

[0078] Optionally, the response frame of the PPDU may be an acknowledgment (ACK) frame, a clear to send (CTS) frame, or other response frames defined in the IEEE 802.11 series of protocols or drafts, which are not limited in this embodiment of the present application. Figure 6 This is a schematic diagram of the structure of a PPDU response frame provided in an embodiment of the present application. Figure 6As shown, the response frame includes the L-STF, L-LTF, legacy signal (L-SIG) field, and data field. The L-STF, L-LTF, and L-SIG fields are preambles. The data field includes the frame control field, frame length (duration) field, receiver address (RA) field, and frame check sequence (FCS) field.

[0079] In the embodiment of the present application, since the L-STF and L-LTF of the response frames of different PPDUs or different types of response frames are usually the same, the radio frequency processing device does not need to know the type of the response frame. It can immediately generate and send the target domain of the response frame to the air interface only under the instruction of the target signal, thereby improving the reply efficiency of the response frame, thereby enabling the AP system to reply to the response frame within one SIFS from the end time of the air interface of the PPDU.

[0080] Optionally, when the broadband signal is a differential signal, the target signal on one or more pairs of signal lines in the wired medium is a common-mode signal. The RF processing device performs superposition processing on the signal on the first signal line and the signal on the second signal line to obtain a superposed signal. The first signal line and the second signal line are a pair of signal lines used to transmit the target signal. In other words, after receiving the signal from the baseband processing device via the wired medium, the RF processing device performs superposition processing on the signals on each pair of signal lines to obtain the target signal.

[0081] Alternatively, when the broadband signal is a common-mode signal, the target signal on one or more pairs of signal lines in the wired medium is a differential signal. After receiving the signal from the baseband processing device via the wired medium, the RF processing device first performs a subtraction process on the signals on each pair of signal lines to obtain the target signal.

[0082] In an embodiment of the present application, when a target signal is transmitted on multiple pairs of signal lines, the radio frequency processing device may combine the signals on the multiple pairs of signal lines that have undergone superposition processing or subtraction processing, and determine whether the target signal is received based on the combined signal.

[0083] Optionally, the target signal is obtained by OOK modulation, specifically by analog OOK or digital OOK modulation. The implementation process of the two modulation methods is as follows:

[0084] In an optional embodiment of the present application, the target signal is obtained by analog OOK modulation. Figure 7 It is a structural diagram of a target signal sending processing unit provided in an embodiment of the present application. Figure 8 It is a structural diagram of a target signal receiving and processing unit provided in an embodiment of the present application.

[0085] like Figure 7 As shown, the target signal sending processing unit includes: a crystal oscillator (such as an oven controlled crystal oscillator (OCXO)), a phase lock loop (PLL), a switch and a filter. Among them, the crystal oscillator and the phase lock loop are used to generate an analog signal of a specified frequency, which is a single-frequency signal (i.e., the target signal), and the frequency of the analog signal can be determined according to the type and / or length of the wired medium. The switch is connected to the MAC processing unit. When the MAC processing unit determines that it needs to reply to the PPDU sent by the STA, it controls the switch to open, that is, output the analog signal; otherwise, the switch is closed, that is, no signal is output. The filter is used to filter the output signal to filter out the interference signal. The filter is usually a low-pass filter.

[0086] like Figure 8 As shown, the target signal receiving and processing unit includes a filter and an analog OOK demodulation unit. The filter is used to filter out the target signal. This filter is typically a low-pass filter, or it can also be a notch filter. The analog OOK demodulation unit is connected to the WLAN processing unit. The analog OOK demodulation unit is used to perform OOK demodulation on the filtered signal and, upon determining that the target signal has been obtained, transmit an immediate response indication to the WLAN processing unit. The analog OOK demodulation unit typically includes a comparator and a detector.

[0087] In another optional embodiment of the present application, the target signal is obtained by digital OOK modulation. The baseband processing device stores a lookup table of digital sampled signals with sampling rates. Figure 9 It is a structural diagram of another target signal sending processing unit provided in an embodiment of the present application. Figure 10 It is a structural diagram of another target signal receiving and processing unit provided in an embodiment of the present application.

[0088] like Figure 9As shown, the target signal sending processing unit includes a digital OOK modulation unit, a digital to analog converter (DAC) and a filter. The digital OOK modulation unit is connected to the MAC processing unit. When the MAC processing unit determines that it needs to reply to the PPDU sent by the STA, it transmits an immediate response indication to the digital OOK modulation unit; the digital OOK modulation unit searches and sends a single-frequency signal (i.e., the target signal) of a specified sampling rate from the digital sampling signal lookup table of the sampling rate according to the immediate response indication. Otherwise, the digital OOK modulation unit outputs zero. The sampling rate of the single-frequency signal is positively correlated with the frequency of the single-frequency signal. For example, the frequency of the single-frequency signal is usually less than 20 megahertz (MHz), then the sampling rate of the single-frequency signal can be 40Msps (million samples per second). The filter is mainly used to filter out the image introduced by the DAC, which is an interference signal relative to the target signal. The filter is usually a low-pass filter.

[0089] like Figure 10 As shown, the target signal receiving and processing unit includes a filter, an analog-to-digital converter (ADC), a digital domain filter, and a digital OOK demodulation unit. The filter is used to filter out the target signal. The filter is typically a low-pass filter, or it can also be a notch filter. The digital domain filter is used to filter out the image introduced by the ADC. The digital OOK demodulation unit is connected to the WLAN processing unit. The digital pseudo-OOK demodulation unit is used to perform digital domain OOK demodulation on the filtered signal and, after determining that the target signal is obtained, transmit an immediate response indication to the WLAN processing unit.

[0090] In an embodiment of the present application, when the MAC processing unit of the baseband processing device determines that a response frame needs to be sent back to the STA, the MAC processing unit transmits an immediate response indication to the target signal transmission processing unit and generates a portion of the response frame excluding the target field based on the frame from the radio frequency processing device. The process of the MAC processing unit generating the portion of the response frame excluding the target field can be referred to the relevant description of the IEEE 802.11 series of protocols and will not be described in detail in this embodiment of the present application. Optionally, the process of generating and transmitting the portion of the PPDU response frame excluding the target field can be referred to steps 406 to 408 below.

[0091] Step 406: The baseband processing device generates a portion of the response frame of the PPDU excluding the target field.

[0092] Optionally, when the target field includes the L-STF and L-LTF, the baseband processing device generates the L-SIG and data fields. The baseband processing device generates the portion of the response frame of the PPDU excluding the target field through the MAC processing unit, then performs baseband processing through the WLAN PHY processing unit, and then transmits the portion to the Ethernet PHY unit through the serial interface after framing is completed through the remote interface framing / deframing unit.

[0093] Step 407: The baseband processing device sends the portion of the response frame of the PPDU excluding the target field to the radio frequency processing device through a wired medium.

[0094] Step 408: The radio frequency processing device sends the portion of the response frame of the PPDU excluding the target domain to the air interface immediately following the target domain.

[0095] When the RF processing device receives the portion of the PPDU response frame excluding the target field from the baseband processing device through the wired medium while the RF processing device is sending the target field to the air interface, the target field immediately sends the portion to the air interface. Alternatively, when the RF processing device receives the portion of the PPDU response frame excluding the target field from the baseband processing device through the wired medium after the RF processing device has sent the target field to the air interface, the RF processing device immediately sends the portion to the air interface.

[0096] It should be noted that the order of the steps of the method for replying a response frame provided in the embodiment of the present application can be appropriately adjusted, and the steps can be increased or decreased accordingly according to the circumstances. Any person skilled in the art can easily think of a modified method within the technical scope disclosed in this application, and the modified method should be included in the scope of protection of this application, so it will not be described in detail.

[0097] In summary, the method for replying a response frame provided in the embodiment of the present application is that after the baseband processing device determines that a response is required to the PPDU sent by the STA, it sends a target signal to the radio frequency processing device through a wired medium indicating that an immediate response to the PPDU is required. The target signal does not need to be processed by the MAC processing unit and the WLAN PHY processing unit in the baseband processing device. After receiving the target signal, the radio frequency processing device immediately generates and sends the target field of the first field in the response frame containing the PPDU to the air interface. Since the baseband processing device does not need to generate the target field of the response frame in the embodiment of the present application, but instead instructs the radio frequency processing device to generate the target field by modulating the target signal, the processing delay constraint of the MAC processing unit of the baseband processing device is reduced, thereby reducing the delay of the radio frequency processing device in sending the response frame to the air interface, allowing the AP system to reply to the response frame within one SIFS from the end time of the air interface of the PPDU. In addition, the baseband processing device does not need to generate the target field of the response frame, thereby saving the processing resources of the baseband processing device.

[0098] Figure 11This is a schematic diagram of the structure of a radio frequency processing device provided in an embodiment of the present application. The radio frequency processing device may be as follows: Figure 1 The radio frequency processing device 102 in the AP system shown. Figure 11 As shown, the radio frequency processing device 110 includes:

[0099] The first receiving module 1101 is configured to receive a PPDU sent by a station STA.

[0100] The first sending module 1102 is configured to send a frame obtained based on the PPDU to a baseband processing device via a wired medium, wherein the radio frequency processing device is remotely separated from the baseband processing device.

[0101] The processing module 1103 is configured to generate a target field in response to a target signal received from the baseband processing device through a wired medium, where the target field includes at least the first field of a response frame of the PPDU, and the target signal is used to instruct the radio frequency processing device to immediately respond to the PPDU.

[0102] The second sending module 1104 is configured to send the target domain to the air interface.

[0103] Alternatively, as Figure 12 As shown, the radio frequency processing device 110 further includes: a second receiving module 1105 .

[0104] The second receiving module 1105 is configured to receive the portion of the PPDU response frame excluding the target field from the baseband processing device via a wired medium. The second sending module 1104 is further configured to send the portion of the PPDU response frame excluding the target field to the air interface immediately following the target field.

[0105] Optionally, the target signal is a single-frequency signal.

[0106] Optionally, the signal used to transmit the frame obtained based on the PPDU between the RF processing device and the baseband processing device and the signal used to transmit the response frame of the PPDU except the target field are both broadband signals, and the target signal and the broadband signal are superimposed and transmitted.

[0107] Optionally, the wired medium includes one or more pairs of signal lines, the broadband signal is a differential signal, the target signal is a common mode signal, and the processing module 1103 is further used to: superimpose the signal on the first signal line and the signal on the second signal line to obtain the target signal.

[0108] Optionally, the target domain includes a traditional short training domain and a traditional long training domain in sequence.

[0109] In summary, in the embodiment of the present application, after determining that a response to the PPDU sent by the STA is required, the baseband processing device sends a target signal to the radio frequency processing device via a wired medium indicating that an immediate response to the PPDU is required. The target signal does not need to be processed by the MAC processing unit and the WLAN PHY processing unit in the baseband processing device. After receiving the target signal, the radio frequency processing device immediately generates and sends a target field, which is the first field in the response frame containing the PPDU, to the air interface. Since the baseband processing device does not need to generate the target field of the response frame in the embodiment of the present application, but instead instructs the radio frequency processing device to generate the target field by modulating the target signal, the processing delay constraint of the MAC processing unit of the baseband processing device is reduced, thereby reducing the delay of the radio frequency processing device in sending the response frame to the air interface, allowing the AP system to reply with a response frame within one SIFS from the end time of the air interface of the PPDU. In addition, the baseband processing device does not need to generate the target field of the response frame, thereby saving the processing resources of the baseband processing device.

[0110] Figure 13 This is a schematic diagram of the structure of a baseband processing device provided in an embodiment of the present application. The baseband processing device may be as follows: Figure 1 The baseband processing device 101 in the AP system shown in FIG. Figure 13 As shown, the baseband processing device 130 includes:

[0111] The receiving module 1301 is configured to receive frames from a radio frequency processing device through a wired medium. The frames are obtained based on the PPDU sent by the station STA. The radio frequency processing device is remotely separated from the baseband processing device.

[0112] The processing module 1302 is configured to generate a target signal when the baseband processing device determines based on the frame that a response frame needs to be sent to the STA, and the target signal is used to instruct the radio frequency processing device to immediately respond to the PPDU.

[0113] The sending module 1303 is configured to send a target signal to a radio frequency processing device via a wired medium.

[0114] Optionally, the processing module 1302 is further used to generate a portion of the PPDU response frame excluding the target field, where the target field includes at least the first field of the PPDU response frame; the sending module 1303 is further used to send the portion of the PPDU response frame excluding the target field to the RF processing device through a wired medium.

[0115] Optionally, the target signal is a single-frequency signal.

[0116] Optionally, the signals used to transmit frames obtained based on the PPDU between the RF processing device and the baseband processing device and the signals used to transmit the response frame of the PPDU except the target field are both broadband signals. The sending module 1303 is used to: couple the target signal to the wired medium so that the target signal and the broadband signal are superimposed and transmitted.

[0117] Optionally, the wired medium includes one or more pairs of signal lines, and the transmitting module 1303 is configured to couple the target signal to at least one pair of signal lines. Alternatively, the broadband signal is a differential signal and the target signal on each pair of signal lines is a common-mode signal; or alternatively, the broadband signal is a common-mode signal and the target signal on each pair of signal lines is a differential signal.

[0118] Optionally, the target signal is obtained by OOK modulation.

[0119] In summary, in the embodiment of the present application, after determining that a response to the PPDU sent by the STA is required, the baseband processing device sends a target signal to the radio frequency processing device via a wired medium indicating that an immediate response to the PPDU is required. The target signal does not need to be processed by the MAC processing unit and the WLAN PHY processing unit in the baseband processing device. After receiving the target signal, the radio frequency processing device immediately generates and sends a target field, which is the first field in the response frame containing the PPDU, to the air interface. Since the baseband processing device does not need to generate the target field of the response frame in the embodiment of the present application, but instead instructs the radio frequency processing device to generate the target field by modulating the target signal, the processing delay constraint of the MAC processing unit of the baseband processing device is reduced, thereby reducing the delay of the radio frequency processing device in sending the response frame to the air interface, allowing the AP system to reply with a response frame within one SIFS from the end time of the air interface of the PPDU. In addition, the baseband processing device does not need to generate the target field of the response frame, thereby saving the processing resources of the baseband processing device.

[0120] Regarding the apparatus in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0121] An embodiment of the present application provides a radio frequency processing device, comprising: a processor and a communication interface, wherein the communication interface comprises a wireless communication interface and a wired communication interface;

[0122] The processor is configured to call a computer program to implement the actions performed by the radio frequency processing device in the above method embodiment;

[0123] The processor is configured to perform information interaction with the STA through the wireless communication interface and to perform information interaction with the baseband processing device through the wired communication interface.

[0124] For example, Figure 14 This is a block diagram of a radio frequency processing device provided in an embodiment of the present application. Figure 14 As shown, the radio frequency processing device includes a processor 1401 and a communication interface 1402. Optionally, the radio frequency processing device also includes a communication bus 1403 and a memory 1404.

[0125] The processor 1401, the memory 1404, and the communication interface 1402 are interconnected via a communication bus 1403. The communication bus 1403 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus. The communication bus may be divided into an address bus, a data bus, and a control bus. For ease of representation, Figure 14 Only one thick line is used in the diagram, but this does not mean that there is only one bus or one type of bus.

[0126] The processor 1401 may include a central processing unit (CPU), a network processor (NP), or a combination of a CPU and an NP. Furthermore, the processor 1401 may include a hardware chip. The hardware chip may be an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL), or any combination thereof.

[0127] Optionally, the memory 1404 may be used to store a computer program, which includes program instructions. The processor 1401 is configured to call the computer program to implement the actions performed by the radio frequency processing device in the above method embodiment.

[0128] Memory 1404 may include volatile memory, such as random access memory (RAM); memory may also include non-volatile memory, such as flash memory, a hard disk drive (HDD), or a solid-state drive (SSD); memory 1404 may also include a combination of the above types of memory.

[0129] There may be multiple communication interfaces 1402, each used to communicate with other devices, such as a baseband processing device or a STA. Communication interface 1402 includes a wired communication interface, which includes an Ethernet interface. The Ethernet interface may be an optical interface, an electrical interface, or a combination thereof. Communication interface 1402 also includes a wireless communication interface, which may include a WLAN interface, an RF interface, a ZigBee network interface, a cellular network communication interface, or a combination thereof.

[0130] An embodiment of the present application provides a baseband processing device, comprising: a processor and a communication interface;

[0131] The processor is configured to call a computer program to implement the actions performed by the baseband processing device in the above method embodiment;

[0132] The processor is configured to perform information interaction with the radio frequency processing device through the communication interface.

[0133] For example, Figure 15 This is a block diagram of a baseband processing device provided by an embodiment of the present application. Figure 15 As shown, the baseband processing device includes a processor 1501 and a communication interface 1502. Optionally, the baseband processing device also includes a communication bus 1503 and a memory 1504.

[0134] The processor 1501, the memory 1504, and the communication interface 1502 are interconnected via a communication bus 1503. The communication bus 1503 may be a PCI bus or an EISA bus. The communication bus may be divided into an address bus, a data bus, and a control bus. For ease of representation, Figure 15 Only one thick line is used in the diagram, but this does not mean that there is only one bus or one type of bus.

[0135] The processor 1501 may include a CPU, an NP, or a combination of a CPU and an NP. Furthermore, the processor 1501 may include a hardware chip. The hardware chip may be an ASIC, a PLD, or a combination thereof. The PLD may be a CPLD, an FPGA, a GAL, or any combination thereof.

[0136] Optionally, the memory 1504 may be used to store a computer program, which includes program instructions. The processor 1501 is configured to call the computer program to implement the actions performed by the baseband processing device in the above method embodiment.

[0137] The memory 1504 may include a volatile memory, such as RAM; the memory may also include a non-volatile memory, such as flash memory, HDD or SSD; the memory 1504 may also include a combination of the above types of memory.

[0138] There may be multiple communication interfaces 1502, which are used to communicate with other devices, such as a radio frequency processing device. The communication interfaces 1502 include wired communication interfaces, and the wired communication interface 15021 includes an Ethernet interface. The Ethernet interface may be an optical interface, an electrical interface, or a combination thereof.

[0139] An embodiment of the present application further provides an access point (AP) system, comprising: a baseband processing device and a radio frequency (RF) processing device, wherein the baseband processing device and the RF processing device are connected via a wired medium, and the baseband processing device and the RF processing device are remotely separated.

[0140] The baseband processing device is as follows Figure 13 or Figure 15 The baseband processing device shown; the radio frequency processing device is as shown Figure 11 、 Figure 12 or Figure 14 The radio frequency processing equipment shown.

[0141] An embodiment of the present application further provides a computer storage medium having instructions stored thereon. When the instructions are executed by a processor of a computer device, the actions performed by the radio frequency processing device or the baseband processing device in the above method embodiment are implemented.

[0142] Those skilled in the art will understand that all or part of the steps to implement the above embodiments may be accomplished by hardware, or by a program to instruct the relevant hardware, and the program may be stored in a computer-readable storage medium, which may be a read-only memory, a disk, or an optical disk, etc.

[0143] In the embodiments of the present application, the terms “first”, “second” and “third” are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0144] In this application, the term "and / or" simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0145] The above description is merely an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the concepts and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A method for replying a response frame, characterized in that: The method comprises: The radio frequency processing device receives the physical layer protocol data unit PPDU sent by the station STA; The radio frequency processing device sends a frame obtained based on the PPDU to a baseband processing device through a wired medium, and the radio frequency processing device is remotely separated from the baseband processing device; The RF processing device generates and sends a target field to the air interface in response to a target signal received from the baseband processing device through the wired medium, where the target field includes at least the first field of the response frame of the PPDU. The target signal is used to instruct the RF processing device to immediately respond to the PPDU.

2. The method according to claim 1, characterized in that The method further comprises: The radio frequency processing device receives, through the wired medium, a portion of the response frame of the PPDU excluding the target field from the baseband processing device; The radio frequency processing device sends the portion of the response frame of the PPDU excluding the target domain to the air interface immediately following the target domain.

3. The method according to claim 1 or 2, characterized in that The target signal is a single-frequency signal.

4. The method according to claim 1 or 2, characterized in that The signal used to transmit the frame obtained based on the PPDU between the RF processing device and the baseband processing device and the signal used to transmit the response frame of the PPDU except the target domain are both broadband signals, and the target signal is superimposed and transmitted with the broadband signal.

5. The method according to claim 4, characterized in that The wired medium includes one or more pairs of signal lines, the broadband signal is a differential signal, and the target signal is a common mode signal. The method further includes: The radio frequency processing device performs superposition processing on a signal on a first signal line and a signal on a second signal line to obtain the target signal, wherein the first signal line and the second signal line are a pair of signal lines for transmitting the target signal.

6. The method according to claim 1, 2 or 5, characterized in that The target domain includes a traditional short training domain and a traditional long training domain in sequence.

7. The method according to claim 1, 2 or 5, characterized in that The target signal is obtained by on-off keying OOK modulation.

8. A method for replying a response frame, characterized in that: The method comprises: The baseband processing device receives a frame from the radio frequency processing device through a wired medium, where the frame is obtained based on a physical layer protocol data unit (PPDU) sent by a station (STA), and the radio frequency processing device is remotely separated from the baseband processing device. When the baseband processing device determines, based on the frame, that a response frame needs to be replied to the STA, the baseband processing device generates a target signal, where the target signal is used to instruct the radio frequency processing device to immediately respond to the PPDU; The baseband processing device sends the target signal to the radio frequency processing device through the wired medium. The target signal is used by the radio frequency processing device to generate and send a target field of a response frame of the PPDU to an air interface.

9. The method according to claim 8, characterized in that The method further comprises: The baseband processing device generates a portion of the response frame of the PPDU excluding the target field, where the target field includes at least the first field of the response frame of the PPDU; The baseband processing device sends the portion of the response frame of the PPDU excluding the target field to the radio frequency processing device through the wired medium.

10. The method according to claim 8 or 9, characterized in that The target signal is a single-frequency signal.

11. The method according to claim 8 or 9, characterized in that The signal used for transmitting a frame obtained based on the PPDU and the signal used for transmitting a portion of a response frame of the PPDU excluding the target field between the RF processing device and the baseband processing device are both broadband signals, and the baseband processing device sends the target signal to the RF processing device through the wired medium, including: The baseband processing device couples the target signal to the wired medium so that the target signal and the broadband signal are superimposed and transmitted.

12. The method according to claim 11, characterized in that The wired medium includes one or more pairs of signal lines, and the baseband processing device couples the target signal to the wired medium, comprising: The baseband processing device couples the target signal to at least one pair of the signal lines; The broadband signal is a differential signal, and the target signal on each pair of signal lines is a common-mode signal; or the broadband signal is a common-mode signal, and the target signal on each pair of signal lines is a differential signal.

13. The method according to claim 8, 9 or 12, characterized in that The target signal is obtained by on-off keying OOK modulation.

14. A radio frequency processing device, characterized in that: include: The first receiving module is configured to receive a physical layer protocol data unit (PPDU) sent by a station (STA); A first sending module is configured to send a frame obtained based on the PPDU to a baseband processing device through a wired medium, wherein the radio frequency processing device is remotely separated from the baseband processing device; a processing module, configured to generate a target field in response to a target signal received from the baseband processing device through the wired medium, the target field including at least a first field of a response frame of the PPDU, the target signal being used to instruct the radio frequency processing device to immediately respond to the PPDU; The second sending module is configured to send the target domain to an air interface.

15. The radio frequency processing device according to claim 14, characterized in that: The radio frequency processing device further includes: a second receiving module; The second receiving module is configured to receive, from the baseband processing device through the wired medium, a portion of the response frame of the PPDU excluding the target field; The second sending module is further configured to send the portion of the response frame of the PPDU excluding the target domain to the air interface immediately following the target domain.

16. The radio frequency processing device according to claim 14 or 15, characterized in that: The target signal is a single-frequency signal.

17. The radio frequency processing device according to claim 14 or 15, characterized in that: The signal used to transmit the frame obtained based on the PPDU between the RF processing device and the baseband processing device and the signal used to transmit the response frame of the PPDU except the target domain are both broadband signals, and the target signal is superimposed and transmitted with the broadband signal.

18. The radio frequency processing device according to claim 17, wherein: The wired medium includes one or more pairs of signal lines, the broadband signal is a differential signal, the target signal is a common mode signal, and the processing module is further configured to: A superposition process is performed on a signal on a first signal line and a signal on a second signal line to obtain the target signal, wherein the first signal line and the second signal line are a pair of signal lines for transmitting the target signal.

19. The radio frequency processing device according to claim 14, 15 or 18, characterized in that: The target domain includes a traditional short training domain and a traditional long training domain in sequence.

20. The radio frequency processing device according to claim 14, 15 or 18, characterized in that: The target signal is obtained by on-off keying OOK modulation.

21. A baseband processing device, characterized in that: include: A receiving module, configured to receive a frame from a radio frequency processing device through a wired medium, the frame being obtained based on a physical layer protocol data unit PPDU sent by a station STA, the radio frequency processing device being remotely separated from the baseband processing device; a processing module, configured to generate a target signal when the baseband processing device determines, based on the frame, that a response frame needs to be replied to the STA, the target signal being used to instruct the radio frequency processing device to immediately respond to the PPDU; The sending module is configured to send the target signal to the radio frequency processing device through the wired medium, where the target signal is used by the radio frequency processing device to generate and send a target field of a response frame of the PPDU to an air interface.

22. The baseband processing device according to claim 21, wherein: The processing module is further configured to generate a portion of a response frame of the PPDU excluding the target field, where the target field includes at least a first field of the response frame of the PPDU; The sending module is further configured to send the portion of the response frame of the PPDU excluding the target field to the radio frequency processing device through the wired medium.

23. The baseband processing device according to claim 21 or 22, characterized in that: The target signal is a single-frequency signal.

24. The baseband processing device according to claim 21 or 22, characterized in that: The signal used for transmitting the frame obtained based on the PPDU and the signal used for transmitting the portion of the response frame of the PPDU excluding the target field between the RF processing device and the baseband processing device are both broadband signals. The sending module is configured to: The target signal is coupled to the wired medium so that the target signal and the broadband signal are superimposed and transmitted.

25. The baseband processing device according to claim 24, wherein: The wired medium includes one or more pairs of signal lines, and the sending module is configured to: coupling the target signal to at least one pair of the signal lines; The broadband signal is a differential signal, and the target signal on each pair of signal lines is a common-mode signal; or the broadband signal is a common-mode signal, and the target signal on each pair of signal lines is a differential signal.

26. The baseband processing device according to claim 21, 22 or 25, characterized in that: The target signal is obtained by on-off keying OOK modulation.

27. A radio frequency processing device, characterized in that: include: A processor and a communication interface, wherein the communication interface includes a wireless communication interface and a wired communication interface; The processor is configured to call a computer program to implement the method for replying a response frame according to any one of claims 1 to 7; The processor is configured to perform information interaction with the station STA through the wireless communication interface, and to perform information interaction with the baseband processing device through the wired communication interface.

28. A baseband processing device, characterized in that: include: processor and communication interface; The processor is configured to call a computer program to implement the method for replying a response frame according to any one of claims 8 to 13; The processor is configured to perform information interaction with the radio frequency processing device through the communication interface.

29. An access point AP system, characterized in that: include: A baseband processing device and a radio frequency processing device, wherein the baseband processing device and the radio frequency processing device are connected via a wired medium and are remotely separated from each other; The baseband processing device is the baseband processing device according to any one of claims 21 to 26 and 28; the radio frequency processing device is the radio frequency processing device according to any one of claims 14 to 20 and 27.

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