CN115734279A

CN115734279A - Signal processing method, device, equipment and storage medium

Info

Publication number: CN115734279A
Application number: CN202111017337.XA
Authority: CN
Inventors: 吴昊; 王鑫
Original assignee: Chengdu Jimi Technology Co Ltd
Current assignee: Chengdu Jimi Technology Co Ltd
Priority date: 2021-08-31
Filing date: 2021-08-31
Publication date: 2023-03-03

Abstract

The invention discloses a signal processing method, a device, equipment and a storage medium, wherein the method is applied to process initiating equipment and comprises the following steps: when executing the wireless security perception process, sending a trigger frame to connected process participation equipment, wherein the trigger frame comprises a process control identifier of the wireless security perception process and a perception parameter corresponding to the process control identifier; and receiving response information returned by the process participation equipment after the process operation corresponding to the process control identifier is executed, wherein the response information is a feedback signal sent after the process participation equipment determines to be matched with the sensing parameter when the process operation is executed, and the feedback signal comprises a measurement signal, measurement feedback of the measurement signal or feedback of whether the wireless security sensing measurement can be executed. The invention can solve the problem of lower wireless sensing efficiency caused by disordered measurement management and control of the wireless security sensing service in the prior art.

Description

Signal processing method, device, equipment and storage medium

Technical Field

The invention belongs to the technical field of wireless measurement and control, and particularly relates to a signal processing method, a signal processing device, signal processing equipment and a storage medium.

Background

The wireless Sensing (Wi-Fi Sensing) technology can realize the functions of motion detection, gesture recognition, biological characteristic measurement and the like based on the existing Wi-Fi network and equipment. In the wireless awareness process, multiple devices are required to participate. These devices involve multiple links, each involving one or more interactions, while participating in the overall wireless awareness process. However, at present, the management and control of the whole wireless sensing process, especially the wireless security sensing service measurement, are relatively disordered, which results in low wireless sensing efficiency.

Disclosure of Invention

The embodiment of the invention provides a signal processing method, a signal processing device, signal processing equipment and a signal processing storage medium, which can solve the problem of low wireless sensing efficiency caused by measurement management and control confusion of wireless security sensing services in the prior art.

In a first aspect, a signal processing method is provided, where the method is applied to a process initiating device, and the method includes:

when executing the wireless security perception process, sending a trigger frame to connected process participation equipment, wherein the trigger frame comprises a process control identifier of the wireless security perception process and a perception parameter corresponding to the process control identifier;

and receiving response information returned by the process participation equipment after the process operation corresponding to the process control identifier is executed, wherein the response information is a feedback signal sent by the process participation equipment after the process participation equipment determines to be matched with the sensing parameter during the process operation, and the feedback signal comprises a measurement signal, measurement feedback of the measurement signal or feedback of whether the wireless security sensing measurement can be executed.

Optionally, the process control identifier includes a first process control identifier, and a process operation corresponding to the first process control identifier is used to poll to obtain a process participating device capable of performing wireless security awareness measurement;

the perception parameters comprise frame type parameters, equipment connection identifiers and safety parameters;

the conditions for matching the process participation device with the perception parameters comprise:

the frame type parameter represents that the trigger frame is a perception trigger frame;

the device connection identifier is matched with the process participation device;

the security parameter characterization process initiating equipment supports wireless security perception measurement;

and matching the process participation equipment with the perception measurement environment corresponding to the perception parameters.

Optionally, the perception parameters further comprise:

at least one of the number of times of repeatedly sending the null data packet NDP, NDP transmission power and NDP arrival target received signal strength indication RSSI;

the security parameters include:

the full length training field LTF counter and LTF generate a sequence verification code SAC, and the secure LTF counter and LTF generate the SAC are used to generate an encrypted NDP frame.

Optionally, the process control identifier includes a second process control identifier, where a process operation corresponding to the second process control identifier is used to request to start a sensing probe signal sending process, or request a process participating device to reply a sensing measurement report;

the perception parameters comprise frame type parameters and equipment connection identifiers;

the device connection identifier matches the process participant device.

Optionally, when the process operation corresponding to the second process control identifier is used to request for starting a sensing probe signal sending process, the process initiating device is a probe signal receiving end, and the process participating device is a probe signal sending end;

after receiving response information returned by the process participation device after executing the process operation corresponding to the process control identifier, the method further includes:

receiving an encrypted NDP frame sent by a process-participating device after starting a sensing detection signal sending process;

and performing wireless security perception measurement on the process participation device according to the encrypted NDP frame.

Optionally, after performing the wireless security awareness measurement on the process participating device according to the encrypted NDP frame, the method further includes:

and after the wireless security perception measurement is finished, sending a detaching Teardown message so that the process participation equipment stops sending the encrypted NDP frame according to the Teardown message.

Optionally, when the process operation corresponding to the second process control identifier is used to request the process participation device to reply the sensing measurement report, the process initiating device is a measurement signal sending end, and the process participation device is a measurement signal receiving end;

the condition that the process participation device is matched with the perception parameter further comprises the following steps:

the process participant device has completed the sensing measurement report when it receives the trigger frame.

Optionally, before sending the trigger frame to the connected process-participating device, the method further includes:

and sending a Null Data Packet Announcement (NDPA) frame to the process participation equipment, wherein the NDPA frame comprises a measurement information class requiring the feedback of the process participation equipment, so that the process participation equipment receives the encrypted NDP frame after determining that the NDPA frame is matched with the NDPA frame and carries out wireless security perception measurement on the sending end according to the measurement information class.

broadcasting beacon information, wherein the beacon information comprises a wireless sensing capability indication parameter;

when an association request sent by the process participation equipment after the corresponding wireless perception capability indication parameter is determined to exist is received, if the process participation equipment is determined to have the wireless perception capability according to the association request, an association response message is returned to the process participation equipment so as to be connected with the process participation equipment.

Optionally, after connecting to the process-participating device, before sending the trigger frame to the connected process-participating device, the method further includes:

sending a perception establishing request to process participation equipment, wherein the perception establishing request is used for carrying out perception negotiation with the process participation equipment;

and when a perception establishment response returned by the process participation equipment is received, the perception negotiation with the process participation equipment is completed.

In a second aspect, a signal processing method is provided, where the method is applied to a process-participating device, and the method includes:

when executing a wireless security perception process, receiving a trigger frame sent by connected process initiating equipment, wherein the trigger frame comprises a process control identifier of the wireless security perception process and a perception parameter corresponding to the process control identifier;

and executing the process operation corresponding to the process control identifier, and returning response information to the process initiating device after the process operation is executed, wherein the response information is a feedback signal which is sent after the response information is determined to be matched with the sensing parameter when the process operation is executed, and the feedback signal comprises a measurement signal, measurement feedback of the measurement signal or feedback of whether the wireless security sensing measurement can be executed.

In a third aspect, there is provided a signal processing apparatus comprising:

the system comprises a sending module, a processing module and a processing module, wherein the sending module is used for sending a trigger frame to connected process participation equipment when a wireless security perception process is executed, and the trigger frame comprises a process control identifier of the wireless security perception process and a perception parameter corresponding to the process control identifier;

the receiving module is used for receiving response information returned by the process participation equipment after the process operation corresponding to the process control identification is executed, wherein the response information is a feedback signal sent by the process participation equipment after the process participation equipment determines to be matched with the sensing parameter when the process operation is executed, and the feedback signal comprises a measuring signal and measurement feedback of the measuring signal or feedback of whether the wireless security sensing measurement can be executed or not;

or,

the system comprises a receiving module, a processing module and a processing module, wherein the receiving module is used for receiving a trigger frame sent by connected process initiating equipment when a wireless security perception process is executed, and the trigger frame comprises a process control identifier of the wireless security perception process and a perception parameter corresponding to the process control identifier;

and the execution module is used for executing the process operation corresponding to the process control identifier and returning response information to the process initiating device after the process operation is finished, wherein the response information is a feedback signal which is sent after the response information is determined to be matched with the sensing parameter when the process operation is executed, and the feedback signal comprises a measurement signal and measurement feedback of the measurement signal or feedback of whether wireless security sensing measurement can be executed.

In a fourth aspect, there is provided a signal processing apparatus comprising a memory, a processor, and a signal processing program stored in the memory and running on the processor, the signal processing program performing the signal processing method as in the first or second aspect.

In a fifth aspect, a computer storage medium is provided, which when executed by a processor implements a signal processing method as in the first or second aspect.

Compared with the prior art, the signal processing method, the signal processing device, the signal processing apparatus and the signal processing storage medium provided by the embodiment of the application send the trigger frame to the process participating apparatus in the execution process of the wireless security awareness process, and the trigger frame includes the process control identifier of the wireless security awareness process and the awareness parameter corresponding to the process control identifier. Therefore, the process participation equipment can execute the process operation corresponding to the process control identification according to the sensing parameters, the execution management of the process participation equipment in each process link is realized by means of the trigger frame, the management and control capacity of the wireless security sensing measurement service is improved, the problem of low wireless sensing efficiency caused by disordered measurement management and control of the wireless security sensing service in the prior art is solved, the equipment has the capacity of executing a plurality of wireless security sensing processes simultaneously, the efficiency of wireless sensing is improved, and the application scene of wireless sensing is expanded.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic flow chart of a signal processing method according to an embodiment of the invention.

Fig. 2 is a schematic flow chart of a signal processing method according to another embodiment of the invention.

Fig. 3 is a schematic flow chart of a signal processing method according to still another embodiment of the present invention.

Fig. 4 is a schematic block diagram of a signal processing apparatus according to an embodiment of the present invention.

Fig. 5 is a schematic block diagram of a signal processing apparatus of an embodiment of the present invention.

Detailed Description

Features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The embodiments will be described in detail below with reference to the accompanying drawings.

Wireless-fidelity (Wi-Fi Sensing) technology is a new technology, and can realize motion detection, gesture recognition and biological characteristic measurement based on the existing Wi-Fi network and Wi-Fi signals sent by devices in the Wi-Fi network. When the wireless sensing technology is used for detection or measurement, changes caused by the movement of objects, pets and people in the environment are detected based on CSI (Channel State Information) or Radar (Radar), so that the detected object is not required to wear any equipment.

The wireless sensing technology is applied to the fields of intelligent home, intrusion detection, medical care, intelligent remote nursing and the like, and is more intelligent and richer in application due to the fact that the detected object is not required to be worn.

The execution of the radio-aware process requires a plurality of devices to participate, wherein an Initiator of the radio-aware process is a process Initiator device, also called Initiator STA, also referred to as ISTA for short. The other participants of the wireless aware process are process participants, also known as responders STA, abbreviated RSTA.

The division criterion of the process initiating device and the process participating device is whether to act as a process initiating subject. When the signal measurement process of the wireless sensing process is involved, the device of the wireless sensing process can be divided into a Transmitter (Transmitter) and a Receiver (Receiver). The sending end is used for sending the sensing signal in the wireless sensing process, and may also be referred to as a sender or a sending end. The receiving end is used for receiving the sensing signal in the wireless sensing process and can also be called as a receiving end.

Specifically, the process initiating device may send a measurement signal, and the process participating device receives the measurement signal and generates a perceptual measurement report according to the measurement signal. At this time, the process initiating device serves as a measuring signal sending terminal, and the process participating device serves as a measuring signal receiving terminal.

Alternatively, the probe signal sent by the process-participating device may be received by the process-initiating device. At this time, the process initiating device serves as a probe signal receiving terminal, and the process participating device serves as a probe signal sending terminal.

It should be noted that, when the above-mentioned devices participate in the wireless sensing process, multiple process operations such as capability exchange, negotiation, measurement report acquisition, etc. are involved between the devices, and each process operation involves at least one interaction. In the current wireless sensing process, especially wireless security sensing, management and control of service measurement are disordered, so that the wireless sensing efficiency is low.

In order to solve the above problem, the present invention provides a signal processing method, referring to fig. 1, in an embodiment, the method is applied to a process initiating device, and includes the following steps:

step S110, when executing the wireless security sensing process, sending a trigger frame to the connected process participation equipment, wherein the trigger frame comprises a process control identifier of the wireless security sensing process and a sensing parameter corresponding to the process control identifier;

step S120, receiving response information returned by the process participating device after executing the process operation corresponding to the process control identifier, where the response information is a feedback signal sent by the process participating device after determining that the response information matches the sensing parameter when executing the process operation, and the feedback signal includes a measurement signal, measurement feedback for the measurement signal, or feedback for whether the wireless security sensing measurement can be executed.

The wireless security sensing process is based on a wireless sensing technology, and signals are transmitted safely by sending encrypted signals through an air interface. It can be understood that the device capable of executing the wireless security awareness process supports both wireless awareness and air interface encryption measurement, and the process initiating device and the process participating device can exchange capabilities when the devices are connected, thereby detecting whether both sides support wireless security awareness measurement.

The Trigger Frame (Trigger Frame) is originally applied to the negotiation process of wireless sensing in the prior art. When a plurality of process participation devices exist, a single signaling is sent through a trigger frame, so that a large amount of signaling overhead brought by the negotiation process of a plurality of response devices is reduced. In this embodiment, the process initiating device sends the trigger frame to control and manage the wireless security-aware process.

In this embodiment, the trigger frame includes a process control identifier and a sensing parameter of the wireless security sensing process. The process control identifier is a tag for controlling which specific process operation in the wireless security awareness process is executed by the process participation device, and each process control identifier corresponds to one process operation in the wireless security awareness process.

The process control identity may be a field in the trigger frame. In an example, the process control identification may be a Subtype (Subtype) of the trigger frame, with different subtypes corresponding to different process operations.

For example, when the subtype of the trigger frame is POLL, that is, the process control flag is POLL, it indicates that the trigger frame is used to request the process participating device to perform the polling operation. When the subtype of the trigger frame is Solicit Feedback, the trigger frame is used for requesting the process participation device to return a perception measurement report. And when the subtype of the trigger frame is Sensing Sounding, the trigger frame is used for requesting the process participation equipment to send a Sensing detection signal.

The sensing parameter corresponds to the process control identifier, and the specific content included in the sensing parameter is related to the process operation requested to be executed by the corresponding process control identifier, and may include all parameters required in the process of executing the process operation.

In an alternative example, the perception parameters may include public information and user information. The common information may be related to the operation of the process requested to be performed by the trigger frame and/or parameters related to the transmission of the trigger frame itself, such as frame type parameters. The user information corresponds to a trigger frame receiving target drawn by the process initiating device. For example, if the process initiating device intends to request the device a and the device B to perform the process operation, the user information should include the user information of the device a and the device B.

Alternatively, the user information may be parameters related to connection, encrypted signal transmission, and sensing measurement between trigger frame reception targets, and may include a device connection identifier of the trigger frame reception target (process participating device). Parameters related to wireless security awareness measurement can be included, for example, the user information can also include the repetition number of sequence symbols of the encrypted signal, the transmission power of the security awareness measurement, the indication of the signal strength reaching the target, the security parameters, and the like. The encrypted signal may be an encrypted NDP (Null Data Packet) frame.

It will be appreciated that for different process participant devices, the common information may be set to be consistent when the process initiates a device request and controls it to perform the same process operation, as long as the user information matches the different process participant devices.

It should be further noted that, based on the different configurations of the user information, the process initiating device may send the trigger frame to a single or multiple process parameter devices at the same time. In addition, the process initiating device can also initiate a plurality of trigger frames at the same time, and the process control identifications of different trigger frames are different, so that the device has the capability of executing a plurality of perception processes at the same time.

In this embodiment, after receiving the trigger frame, the process participation device executes the process operation corresponding to the process control identifier according to the sensing parameter in the trigger frame. In the process of executing the process operation, if the process participation equipment determines that the process participation equipment is matched with the perception parameter, response information is returned to the process participation equipment, and therefore control management and feedback of the process initiating equipment to the process operation executed by the process participation equipment are achieved.

It should be noted that the response message is a feedback signal sent by the process-participating device after determining that the sensing parameter matches with the sensing parameter, and may refer to one of a measurement signal, measurement feedback on the measurement signal, or feedback on whether a wireless security sensing measurement can be performed. An example analysis will be subsequently performed in connection with the content of the feedback signal and the perceptual parameter matching process.

In an optional example, the response information may be a response message, for example, an Ack (acknowledgement) message, and may also be a CTS (clear to send ) message.

It should be further noted that if the process participating device does not match the sensing parameter, no response information is returned, that is, no response is made. And when the process initiating device does not receive the response information within the preset time after sending the trigger frame, the process participating device which does not return the response information is considered not to execute the process operation. Alternatively, in other examples, a message that is not allowed to be sent may also be returned to the process initiating device.

In the signal processing method according to this embodiment, a trigger frame is sent to the process participating device in the execution process of the wireless security awareness process, where the trigger frame includes a process control identifier of the wireless security awareness process and a awareness parameter corresponding to the process control identifier. Therefore, the process participation equipment can execute the process operation corresponding to the process control identification according to the sensing parameters, the execution management of the process participation equipment in each process link is realized by means of the trigger frame, the management and control capacity of the wireless security sensing measurement service is improved, the problem of low wireless sensing efficiency caused by disordered measurement management and control of the wireless security sensing service in the prior art is solved, the equipment has the capacity of executing a plurality of wireless security sensing processes simultaneously, the efficiency of wireless sensing is improved, and the application scene of wireless sensing is expanded.

In another optional example, the process control identifier includes a first process control identifier, and a process corresponding to the first process control identifier is configured to poll a process participating device capable of performing the wireless security awareness measurement. At this time, the sensing parameter includes a frame type parameter in the common information, and a device connection identifier and a security parameter in the user information.

It should be noted that, in this example, the process initiating device may be a measurement signal sending end or a probe signal receiving end. The process initiating device sends a trigger frame including a first process control identifier, the trigger frame is executed after the process initiating device is connected with the process participating devices and negotiation is completed, and the trigger frame is used for screening all connected process participating devices to obtain devices capable of executing wireless security perception measurement. The above described capability to perform wireless security aware measurements is a screening made for specific measurement content and/or measurement environment.

The screening conditions involved in the screening process, that is, the conditions for matching the process-participating device with the sensing parameters, may include: the frame type parameter represents that the trigger frame is a perception trigger frame; the device connection identifier is matched with the process participation device; the security parameter characterization process initiating equipment supports wireless security perception measurement; and matching the process participation equipment with the perception measurement environment corresponding to the perception parameters.

The above-mentioned security parameters may include at least one of the following parameters: a security measurement identifier, a signaling length, a security LTF (Long-training Field) counter, an LTF-generated SAC (Sequence Authentication Code), and the like.

For the security parameter in the matching condition, the security parameter may be set when the process initiating device sends the trigger frame if the process initiating device supports and enables wireless security awareness. The set security parameter may be a security measurement identity. When the process participation equipment receives the trigger frame and matches the trigger frame, the safety parameter is set to represent that the process initiating equipment supports wireless safety perception measurement; otherwise, the characterization process initiating device does not support wireless security perception measurement, and at this time, the process participating device is not matched with the perception parameters, and the screening condition is not passed.

The secure LTF counter in the security parameters can determine the random number used to generate the LTF sequence, and the random number and LTF generating SAC determine the LTF sequence, which together indicate how the encrypted signal is generated, i.e. the NDP frame is encrypted.

For the matching of the process participation device in the screening condition and the sensing measurement environment corresponding to the sensing parameter, the encrypted signal is used as the encrypted NDP frame in the embodiment, and the wireless security sensing measurement is used for explaining the measurement of the heart rate of the user.

The process initiating device may determine a Signal transmission range of the encrypted NDP frame according to the accuracy of the heart rate measurement, and further obtain NDP transmission power in the sensing parameter and/or a Received Signal Strength Indication (Received Signal Strength Indication) of the NDP to a target RSSI according to the Signal transmission range, wherein the process participating device in a weak Signal area may be screened out by the NDP to the target RSSI, for example, the weak Signal area is a corner of a room.

When the transmission power of the process participation device receiving the trigger frame is not in the range of the NDP transmission power of the encrypted NDP frame, which indicates that the signal precision of the process participation device is not enough in the heart rate measurement, the process participation device can be screened out. Otherwise, the signals of the process participation equipment have reference significance for heart rate acquisition, and the process participation equipment can be screened out to carry out wireless security perception measurement.

It should be further noted that, for detection of other scenes such as human body position detection, the transmission power range and/or the NDP arrival target RSSI can be set correspondingly, so as to play a role in screening out a suitable process participation device matched with the sensing measurement environment corresponding to the sensing parameter.

The detailed description is made by the process initiating device ISTA sending a trigger frame including a first process control identifier to RSTA1, RSTA2, RSTA3, and RSTA4.

The trigger frame includes two parameters, common info and User info. User info has four entries, user info1 through User info4, corresponding to RSTA1 through RSTA4, respectively.

The Common info includes Type of Trigger frame and Common info (Common information corresponding to the frame Type parameter). The Trigger dependent common info may contain a Trigger frame subtype.

For example, when the Type is Sensing, where Sensing indicates that the current Trigger frame is a Sensing Trigger frame, the Trigger frame subtype contained in Trigger dependent common info is Sensing Trigger subtype. The Sensing trigger subtype is set to be POLL, the process operation corresponding to the current Sensing trigger frame is represented for polling, and the parameter content POLL of the Sensing trigger subtype is the first process control identifier of the trigger frame.

User info contains Parameters AID, REP, NDP Tx Power (NDP transmit Power), NDP Target RSSI (NDP Target RSSI), and Secure LTF Parameters (security Parameters).

The parameter AID is a connection identifier of the STA, and among the User info1 to User info4, the AID may be set as connection identifiers of RSTA1 to RSTA4, respectively.

The parameter REP indicates the repetition number of the NDP sequence symbol, and can indicate the repetition number of the sequence symbol when the encrypted NDP frame is transmitted, so that the accuracy of the wireless security sensing measurement is improved by sending the encrypted NDP frame for multiple times.

The parameter NDP Tx Power indicates the transmit Power of the encrypted NDP frame, which may be determined by determining the transmit Power range of the NDP Tx Power at RSTA.

The parameter NDP Target RSSI indicates the Target-arriving RSSI of the encrypted NDP frame, so that the requirements on the signal strength of the process participation equipment can be provided, and a part of equipment with the signal transmission strength not meeting the standard is screened out.

The parameter Secure LTF Parameters indicates whether the process participant is enabled and supports wireless security aware measurements, only the enabled and supported process initiator will set Secure LTF Parameters in User info correspondingly, otherwise no Secure LTF Parameters are carried.

Assuming that RSTA1 and RSTA2 receive a Trigger frame, where Type in the Trigger frame is Sensing, AID corresponds to a connection identifier including RSTA1 and RSTA2, and Secure LTF Parameters are set, and in addition, according to NDP Tx Power, NDP Target RSSI, and RSTA self condition, it is determined that a Sensing measurement environment corresponding to a Sensing parameter in a Trigger frame matches, and RSTA1 and RSTA2 may send response information to the ISTA.

Determining that the perceptual measurement environment matching between the RSTA1/RSTA2 and the perceptual parameter in the trigger frame may correspondingly include: NDP Tx Power is within the transmission Power range of RSTA1/RSTA2, RSTA1/RSTA2 is on and supports wireless security awareness measurement, and the signal transmission strength of RSTA1/RSTA2 conforms to NDP Target RSSI.

Assuming that RSTA3 and RSTA4 receive a Trigger frame, where Type in the Trigger frame is Sensing, AID corresponds to a connection identifier including RSTA3 and RSTA4, but NDP Tx Power is not in the transmission Power range of RSTA3, and RSTA4 does not support wireless security awareness, neither RSTA3 nor RSTA4 sends a response message to the ISTA.

According to the embodiment, the execution and management of the screening process of the process participation equipment before the measurement of the wireless sensing equipment are realized, and the management and control capacity of the wireless security sensing measurement service is improved.

In yet another optional example of the present application, the process control identifier includes a second process control identifier, where a process corresponding to the second process control identifier is operated to request to start a sensing probe signaling process, or request the process participating device to reply a sensing measurement report.

In this example, the process initiating device sends the trigger frame including the second process control identifier after connecting with the process participating device, completing the negotiation, and screening the process participating device. The process operation finally realizes wireless security perception measurement according to different roles borne by the process participation equipment and the process initiating equipment in the wireless perception measurement, and a measurement report is obtained.

It should be noted that, before measurement is implemented or a measurement signal sending end finally obtains a measurement report, in the process of matching the executed process participation device with the sensing parameters, the sensing parameters may include a frame type parameter in the common information and a device connection identifier in the user information. The matching conditions may include: the frame type parameter represents that the trigger frame is a perception trigger frame; the device connection identifier is matched with the process participation device.

When the process operation is used for requesting to start a sensing detection signal sending process, the process initiating device is a detection signal receiving end, the process participating device is a detection signal sending end, the process participating device sends out an encrypted NDP frame, and the process initiating device carries out wireless security sensing measurement on the encrypted NDP frame to obtain a measurement report.

The process operation is used for requesting the process participation device to reply the sensing measurement report, the process initiating device is a measurement signal sending end, and the process participation device is a measurement signal receiving end. Namely, the process initiating device sends out an encrypted NDP frame, the process participating device carries out wireless security perception measurement on the encrypted NDP frame, and the process participating device replies the measurement report to the process initiating device after obtaining the measurement report.

It should be further noted that, when the process-participating device replies the sensing measurement report, the condition that the process-participating device matches the sensing parameter may further include: the process participant device has completed the sensing measurement report when it receives the trigger frame. The acquisition time of the wireless sensing measurement report can be shortened by adding the condition limitation that the process participation equipment completes the sensing measurement report.

The following description is continued by taking an example in which the process initiating device ISTA sends a trigger frame to RSTA1 to RSTA4.

When the process operation is used for requesting to start a sensing detection signal sending process, the process initiating device ISTA is a detection signal receiving end. If the process initiating device receives the response information returned by the RSTA1 and the RSTA2, the RSTA1 and the RSTA2 are detection signal sending terminals. The process initiating device ISTA may send the trigger frame including the second process control identifier to the RSTA1 and the RSTA2 according to a preset sequence, for example, a sequence or a reverse sequence, so that the screened RSTA1 and RSTA2 sequentially start the sensing probe sending process, and send out the encrypted sensing probe, that is, the encrypted NDP frame.

Taking the example of sequentially sending the Trigger frame including the second process control identifier, the ISTA sends a Trigger frame to the RSTA1, where the Trigger frame includes Common info and User info 1. In addition, the second process control identifier included in the Trigger frame is represented by a Sensing Trigger subtype, and a corresponding field of the second process control identifier is Sensing sounding, which indicates that the process operation corresponding to the Trigger frame is used for requesting the corresponding STA to send a Sensing probe signal.

If the parameter AID of the User info1 includes the connection identifier of RSTA1, the Common info records that the type of the Trigger frame is the sensing Trigger frame, and the RSTA1 can currently execute the sensing probe signal sending process, sending a response message to the ISTA, where the response message is used to indicate the ISTA, and the RSTA1 can start the sensing probe signal sending process.

And after the RSTA1 returns the preset short inter-frame interval time of the response information, sending the encrypted NDP frame to the ISTA by referring to the negotiation parameter during negotiation. And the ISTA receives the encrypted NDP frame sent by the process participation equipment after starting the sensing detection signal sending process after receiving the response information, and then performs wireless security sensing measurement on the process participation equipment according to the encrypted NDP frame.

The process of the ISTA sending the trigger frame including the second process control identifier to the RSTA2 for performing the wireless security sensing measurement may also refer to the foregoing execution, which is not described herein in detail.

It should be further noted that, after the ISTA completes the sensing measurement on all the screened RSTAs, a Teardown message may be sent through the air interface, so that the process participating device stops sending the encrypted NDP frame according to the Teardown message, thereby playing a role in closing the wireless security sensing measurement.

In another example, the process initiating device ISTA is the sender when the process is operative to request the process participating device to reply to the aware measurement report. If the process initiating device receives the response information returned by the RSTA1 and the RSTA2, the RSTA1 and the RSTA2 are receiving ends.

After receiving the trigger frame responses (response information) of RSTA1 and RSTA2, the ISTA may send an NDPA (Null Data Packet Announcement) frame to the RSTA, where the NDPA frame may be used to broadcast specific content of a sensing measurement report that requires to be replied after each RSTA measurement in the current measurement period, where the content at least includes the content in table 1 below.

Parameter(s)	Description of the invention
		Frame Control	Frame format
Duration	Period of time
		RA	Receiving device address
TA	Sending device address
		Beamformer Dialog token	For beacon recognition of NDPA frames
RSTA info1	RSTA1 feedback information
		RSTA info2	RSTA2 feedback information
FCS	MAC frame check sequence

TABLE 1

The RSTA info n (n =1,2, … …) information element in table 1 indicates the RSTA1 and RSTA2 participating in the wireless security awareness measurement this time, and the measurement information class of the feedback in the awareness measurement report needs to be reported. After the RSTA1 monitors the NDPA frame, if the field of the NDPA frame includes the address of the RSTA1, it is determined that the RSTA1 matches the NDPA frame. The RSTA1 can receive the encrypted NDP frame sent by the ISTA after the short inter-frame interval is preset, and perform sensing measurement, and finally the RSTA forms a sensing measurement report according to the measurement information.

It will be appreciated that in this example, the wireless security aware measurement is made by the RSTA on encrypted NDP frames issued by the ISTA, which requests a return aware measurement report from the RSTA using a trigger frame that includes the second process control identity.

The matching condition setting performed by the ISTA requesting the return of the sensing measurement report to the RSTA1 and the RSTA2 is basically consistent with the process of requesting the start of the sensing detection signal sending process. The main difference is that when a sensing trigger subtype is requested to return a sensing measurement report, the parameter of the sensing trigger subtype is a soliit feedback, and the parameter soliit feedback indicates that the process operation, which is requested to be executed by the trigger frame, is used for requesting the RSTA to return the sensing measurement report. If RSTA1 and RSTA2 have finished wireless security perception measurement, obtain perception measurement report, can regard perception measurement report as response information to return to ISTA.

Referring to fig. 2, based on the above embodiment, in another embodiment of the present application, the method includes:

step S210, broadcasting beacon information when executing the wireless security perception process, wherein the beacon information comprises wireless perception capability indication parameters;

step S220, when receiving an association request sent by the process participation equipment after determining that the corresponding wireless perception capability indication parameter exists, if the process participation equipment is determined to have the wireless perception capability according to the association request, returning an association response message to the process participation equipment so as to be connected with the process participation equipment;

step S230, sending a perception establishing request to the process participation equipment, wherein the perception establishing request is used for carrying out perception negotiation with the process participation equipment;

step S240, when receiving the perception establishment response returned by the process participation equipment, finishing the perception negotiation with the process participation equipment;

step S250, sending a trigger frame to the connected process participation equipment, wherein the trigger frame comprises a process control identifier of the wireless security sensing process and a sensing parameter corresponding to the process control identifier;

step S260, receiving response information returned by the process participating device after executing the process operation corresponding to the process control identifier, where the response information is a feedback signal sent by the process participating device after determining that the response information matches the sensing parameter when executing the process operation, and the feedback signal includes a measurement signal, measurement feedback for the measurement signal, or feedback for whether the wireless security sensing measurement can be executed.

The main difference between this embodiment and the foregoing embodiment is that this embodiment adds the procedures of device connection, capability exchange, and negotiation between devices participating in wireless security awareness.

It should be noted that if the process initiating device/process participating device supports and has enabled the wireless sensing, the local parameter dot11sensing option executed of the corresponding device is set to true. If the air interface security measurement is supported, the local parameter dot11 secuetltfilmmented of the device is set to true. Through the setting of the two local parameters, the process initiating device/the process participating device can be indicated to support and start the wireless sensing function, and simultaneously, the air interface safety measurement is supported.

When the process initiating device requests to connect to the process participating device, the process initiating device may add an ISTA-sensing capability, which is a wireless sensing capability indication parameter, to a beacon (beacon) message according to the state value of the local parameter. That is, when the two local parameters are both true, the parameter is carried in the beacon message, and the process initiating device is indicated to support wireless sensing and air interface encryption.

And the process participation equipment receives the broadcast beacon message and reads the parameter ISTA-sensing capability. When the local parameters dot11 Sensing-optionlnplemented and dot11 seculetfimplemented of the process participating device are both true, that is, the process participating device also has the corresponding wireless Sensing capability indication parameter RSTA-Sensing capability, the process participating device sends an Association request to the process initiating device.

The Association request may carry a wireless sensing capability indication parameter RSTA-sensing capability corresponding to the process participation device, so as to indicate, to the process initiating device, that the process participation device supports wireless sensing and supports air interface encryption.

The process initiating device receives the association request, and when the association request is confirmed to include the RSTA-sensing capability parameter, that is, the process participating device is determined to have the wireless sensing capability according to the association request, an association response message can be returned to the process participating device, so that the connection and capability exchange between the process participating device and the process initiating device are realized.

When the process initiating device needs to perform the wireless security awareness service, service negotiation needs to be performed. A sending setup request message may be sent by the process initiating device to the process participating device, where the setup request message is used for performing a process-aware negotiation with the process participating device, and the content included in the setup request message may be detailed in table 2 below.

TABLE 2

When the Sensing role is Transmitter, it means that the process initiating device is requested to be used as a sending end in the Sensing establishment request, and meanwhile, the process participating device is used as a receiving end. When the Sensing role is Receiver, it means that the process initiating device is requested to be used as a receiving end in the Sensing establishment request, and the process participating device is used as a sending end at the same time.

The Sensing measurement profile may include a measurement period, a measurement duration, a frequency band, a bandwidth, antenna configuration information, a supported transmission power range, and the like.

If the process participation device agrees to execute the wireless perception process, the returned perception establishing response is sent to the process initiating device, and the perception establishing response can indicate that the wireless security perception is agreed to execute, so that the negotiation is completed.

In the embodiment, the whole process realization process of wireless security sensing is provided by adding the processes of equipment connection, capability exchange and negotiation among the equipment participating in the wireless security sensing, and the measurement of the wireless security sensing service is realized by combining the forms of trigger frames, broadcasting and the like.

In still another alternative example, referring to fig. 3, when the signal processing method is applied to a process participation device, the following steps may be included:

step S310, when executing the wireless security perception process, receiving a trigger frame sent by a connected process initiating device, wherein the trigger frame comprises a process control identifier of the wireless security perception process and a perception parameter corresponding to the process control identifier;

step S320, executing the process operation corresponding to the process control identifier, and returning response information to the process initiating device after the process operation is completed, where the response information is a feedback signal sent after determining that the response information matches the sensing parameter when the process operation is executed, and the feedback signal includes a measurement signal, measurement feedback for the measurement signal, or feedback for whether the wireless security sensing measurement can be executed.

In the signal processing method according to this embodiment, in the execution process of the wireless security awareness process, a trigger frame sent by the process initiating device is received, where the trigger frame includes a process control identifier of the wireless security awareness process and a awareness parameter corresponding to the process control identifier. Therefore, the process participation equipment can execute the process operation corresponding to the process control identification according to the sensing parameters, the process initiating equipment realizes the execution management of the process participation equipment in each process link by means of the trigger frame, the management and control capacity of the wireless security sensing measurement service is improved, the problem of low wireless sensing efficiency caused by the measurement management and control confusion of the wireless security sensing service in the prior art is solved, the equipment has the capacity of executing a plurality of wireless security sensing processes simultaneously, the efficiency of wireless sensing is improved, and the application scene of wireless sensing is expanded.

The signal processing method according to the embodiment of the present invention is described in detail above with reference to fig. 1 to 3, and the signal processing apparatus according to the embodiment of the present invention is described in detail below with reference to fig. 4.

Referring to fig. 4, the signal processing apparatus includes:

a sending module 410, configured to send a trigger frame to a connected process participating device when executing a wireless security awareness process, where the trigger frame includes a process control identifier of the wireless security awareness process and a awareness parameter corresponding to the process control identifier;

a receiving module 420, configured to receive response information returned by the process participating device after executing the process operation corresponding to the process control identifier, where the response information is a feedback signal sent by the process participating device after determining that the response information matches the sensing parameter when executing the process operation, and the feedback signal includes a measurement signal, measurement feedback for the measurement signal, or feedback for whether the wireless security sensing measurement can be executed.

In another optional example, the process control identifier includes a first process control identifier, and a process operation corresponding to the first process control identifier is used to poll a process participating device capable of performing the wireless security awareness measurement;

the conditions for the signal processing device to match the perceptual parameters include:

the frame type parameter representation trigger frame is a perception trigger frame;

In yet another optional example, the perception parameters further comprise:

the security parameters include:

In yet another optional example, the process control identifier includes a second process control identifier, where a process operation corresponding to the second process control identifier is used to request to start a sensing probe signal sending process, or request a process participating device to reply a sensing measurement report;

the device connection identifier is matched with the process participation device.

In yet another optional example, when the process operation corresponding to the second process control identifier is used to request for starting a sensing probe signal sending process, the signal processing apparatus is a probe signal receiving end, and the process participation device is a probe signal sending end;

the signal processing device also comprises a measuring module; wherein,

the receiving module is also used for receiving the encrypted NDP frame sent by the process participation equipment after starting the sensing detection signal sending process;

and the measurement module is used for carrying out wireless security perception measurement on the process participation equipment according to the encrypted NDP frame.

In yet another optional example, the sending module is further configured to send a Teardown message after the wireless security awareness measurement is completed, so that the process participating device stops sending the encrypted NDP frame according to the Teardown message.

In yet another optional example, when the process operation corresponding to the second process control identifier is used to request the process participating device to reply the sensing measurement report, the signal processing apparatus is a measurement signal sending end, and the process participating device is a measurement signal receiving end;

the condition that the signal processing device is matched with the perception parameters further comprises the following steps:

In yet another optional example, the sending module is further configured to send a null data packet announcement NDPA frame to the process participation device, where the NDPA frame includes a measurement information class that requires feedback of the process participation device, so that the process participation device receives the encrypted NDP frame after determining that the NDPA frame is matched with the NDPA frame, and performs wireless security sensing measurement on the sending end according to the measurement information class.

In still another optional example, the signal processing apparatus further comprises:

the broadcast module is used for broadcasting beacon information, and the beacon information comprises wireless sensing capability indication parameters;

and the return module is used for returning an association response message to the process participation equipment to be connected with the process participation equipment if the process participation equipment is determined to have the wireless perception capability according to the association request when receiving the association request sent by the process participation equipment after determining that the corresponding wireless perception capability indication parameter exists.

In yet another optional example, the signal processing apparatus further comprises a negotiation module;

the negotiation module is also used for sending a perception establishing request to the process participation equipment, and the perception establishing request is used for carrying out perception negotiation with the process participation equipment; and when a perception establishment response returned by the process participation equipment is received, the perception negotiation with the process participation equipment is completed.

In an alternative example, when the signal processing apparatus is a process participation device, the method includes:

the receiving module is used for receiving a trigger frame sent by the connected process initiating device when the wireless security perception process is executed, wherein the trigger frame comprises a process control identifier of the wireless security perception process and a perception parameter corresponding to the process control identifier.

Fig. 5 shows a schematic hardware structure diagram of a signal processing device according to an embodiment of the present application. The signal processing device may comprise, among other things, a processor 501 and a memory 502 in which computer program instructions are stored.

Specifically, the processor 501 may include a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or may be configured to implement one or more Integrated circuits of the embodiments of the present Application.

Memory 502 may include mass storage for data or instructions. By way of example, and not limitation, memory 502 may include a Hard Disk Drive (HDD), a floppy Disk Drive, flash memory, an optical Disk, a magneto-optical Disk, tape, or a Universal Serial Bus (USB) Drive or a combination of two or more of these. Memory 502 may include removable or non-removable (or fixed) media, where appropriate. The memory 502 may be internal or external to the integrated gateway disaster recovery device, where appropriate. In a particular embodiment, the memory 502 is non-volatile solid-state memory.

Memory 502 may include Read Only Memory (ROM), random Access Memory (RAM), magnetic disk storage media devices, optical storage media devices, flash memory devices, electrical, optical, or other physical/tangible memory storage devices. Thus, in general, the memory 502 comprises one or more tangible (non-transitory) computer-readable storage media (e.g., a memory device) encoded with software comprising computer-executable instructions and when the software is executed (e.g., by one or more processors), it is operable to perform the operations described with reference to the methods in accordance with the above-described aspects of the disclosure.

The processor 501 reads and executes the computer program instructions stored in the memory 502 to implement any one of the signal processing methods in the above-described embodiments.

In one example, the signal processing device may also include a communication interface 503 and a bus 510. As shown in fig. 5, the processor 501, the memory 502, and the communication interface 503 are connected via a bus 510 to complete communication therebetween.

The communication interface 503 is mainly used for implementing communication between modules, apparatuses, units and/or devices in the embodiments of the present application.

The bus 510 includes hardware, software, or both to couple the components of the signal processing device to each other. By way of example, and not limitation, a bus may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a Hypertransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an infiniband interconnect, a Low Pin Count (LPC) bus, a memory bus, a Micro Channel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a video electronics standards association local (VLB) bus, or other suitable bus or a combination of two or more of these. Bus 510 may include one or more buses, where appropriate. Although specific buses are described and shown in the embodiments of the application, any suitable buses or interconnects are contemplated by the application.

The signal processing device may be based on a signal processing method, thereby implementing the signal processing method and apparatus described in conjunction with fig. 1 to 4.

In addition, in combination with the signal processing method in the foregoing embodiments, the embodiments of the present application may be implemented by providing a computer storage medium. The computer storage medium having computer program instructions stored thereon; the computer program instructions, when executed by a processor, implement any of the signal processing methods of the above embodiments.

In addition, the term "and/or" herein is only one kind of association relationship describing the association object, and means that there may be three kinds of relationships, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter associated objects are in an "or" relationship.

It should be understood that in the present embodiment, "B corresponding to a" means that B is associated with a, from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may be determined from a and/or other information.

While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A signal processing method applied to a process initiating device, the method comprising:

when a wireless security sensing process is executed, sending a trigger frame to connected process participation equipment, wherein the trigger frame comprises a process control identifier of the wireless security sensing process and a sensing parameter corresponding to the process control identifier;

receiving response information returned by the process participation device after executing the process operation corresponding to the process control identifier, wherein the response information is a feedback signal sent by the process participation device after determining that the response information is matched with the sensing parameter when executing the process operation, and the feedback signal comprises a measurement signal, measurement feedback of the measurement signal, or feedback of whether wireless security sensing measurement can be executed.

2. The signal processing method according to claim 1, wherein the process control identifier comprises a first process control identifier, and a process corresponding to the first process control identifier is operated to poll the process participating devices capable of performing the wireless security awareness measurement;

the condition that the process participation device is matched with the perception parameters comprises the following conditions:

the security parameter characterizes that the process initiating device supports wireless security aware measurement;

and the process participation equipment is matched with the perception measurement environment corresponding to the perception parameters.

3. The signal processing method of claim 2, wherein the perceptual parameters further comprise:

the security parameters include:

generating a sequence verification code (SAC) by using a full Length Training Field (LTF) counter and an LTF, wherein the safe LTF counter and the LTF are used for generating an encrypted NDP frame.

4. The signal processing method according to claim 1, wherein the process control identifier comprises a second process control identifier, and a process operation corresponding to the second process control identifier is used to request to start a sensing probe signal sending process, or request the process participating device to reply a sensing measurement report;

the condition that the process participation device is matched with the perception parameter comprises the following conditions:

5. The signal processing method according to claim 4, wherein when the process operation corresponding to the second process control identifier is used to request for starting a sensing probe signal sending process, the process initiating device is a probe signal receiving terminal, and the process participating device is a probe signal sending terminal;

receiving an encrypted NDP frame sent by the process-participating device after starting the sensing detection signal sending process;

and performing wireless security perception measurement on the process participation equipment according to the encrypted NDP frame.

6. The signal processing method of claim 5, wherein after the performing the wireless security aware measurement on the process participant device according to the encrypted NDP frame, further comprises:

7. The signal processing method according to claim 4, wherein when the process operation corresponding to the second process control identifier is used to request the process participating device to reply the sensing measurement report, the process initiating device is a measurement signal sending end, and the process participating device is a measurement signal receiving end;

the process participant device has completed the perceptual measurement report when receiving the trigger frame.

8. The signal processing method of claim 7, wherein before sending the trigger frame to the connected process-participating device, further comprising:

and sending a Null Data Packet Announcement (NDPA) frame to the process participation equipment, wherein the NDPA frame comprises a measurement information class requiring feedback of the process participation equipment, so that the process participation equipment receives an encrypted NDP frame after determining that the NDPA frame is matched with the process participation equipment, and performs wireless security perception measurement on the sending end according to the measurement information class.

9. The signal processing method according to claim 1, wherein before sending the trigger frame to the connected process-participating device, the method further comprises:

broadcasting beacon messages, wherein the beacon messages comprise wireless sensing capability indication parameters;

and when receiving an association request sent by the process participation equipment after determining that the corresponding wireless perception capability indication parameters exist, if the process participation equipment is determined to have the wireless perception capability according to the association request, returning an association response message to the process participation equipment so as to be connected with the process participation equipment.

10. The signal processing method according to claim 9, wherein after the connection with the process-participating device and before sending the trigger frame to the connected process-participating device, the method further comprises:

sending a perception establishing request to the process participation equipment, wherein the perception establishing request is used for carrying out perception negotiation with the process participation equipment;

11. A signal processing method applied to a process participation device, the method comprising:

when a wireless security perception process is executed, receiving a trigger frame sent by connected process initiating equipment, wherein the trigger frame comprises a process control identifier of the wireless security perception process and a perception parameter corresponding to the process control identifier;

and executing the process operation corresponding to the process control identifier, and returning response information to the process initiating device after the process operation is executed, wherein the response information is a feedback signal which is sent after the response information is determined to be matched with the sensing parameter when the process operation is executed, and the feedback signal comprises a measurement signal, measurement feedback of the measurement signal, or feedback of whether wireless security sensing measurement can be executed.

12. A signal processing apparatus, characterized in that the signal processing apparatus comprises:

a receiving module, configured to receive response information returned by the process participating device after executing the process operation corresponding to the process control identifier, where the response information is a feedback signal sent by the process participating device after determining that the response information is matched with the sensing parameter when executing the process operation, and the feedback signal includes a measurement signal and measurement feedback for the measurement signal, or feedback for whether wireless security sensing measurement can be executed;

or,

the system comprises a receiving module and a processing module, wherein the receiving module is used for receiving a trigger frame sent by connected process initiating equipment when a wireless security sensing process is executed, and the trigger frame comprises a process control identifier of the wireless security sensing process and sensing parameters corresponding to the process control identifier;

and the execution module is used for executing the process operation corresponding to the process control identifier and returning response information to the process initiating device after the process operation is executed, wherein the response information is a feedback signal which is sent after the response information is determined to be matched with the sensing parameter when the process operation is executed, and the feedback signal comprises a measuring signal and measurement feedback of the measuring signal, or the feedback of whether wireless security sensing measurement can be executed.

13. A signal processing apparatus comprising a memory, a processor, and a signal processing program stored in the memory and running on the processor, the signal processing program performing the signal processing method according to any one of claims 1 to 11.

14. A computer storage medium, characterized in that the computer storage medium realizes the signal processing method of any one of claims 1 to 11 when executed by a processor.