CN108075869B - Wake-up frame generation and decoding method and device - Google Patents

Abstract

The invention discloses a wake-up frame generation and decoding method and device. The method includes: an access point constructing a wake-up frame of a first mode, wherein the wake-up frame includes a preamble portion, the preamble portion includes a preamble portion, the preamble portion is located at the beginning of the wake-up frame, and the The preamble part of the wake-up frame of the first mode implicitly carries the identification of the station; the access point sends the wake-up frame of the first mode to the station. The above method can reduce the energy consumed by the station in decoding the wake-up frame.

Description

Wake-up frame generation and decoding method and device

technical field

The present invention relates to communication technology, and in particular, to a method and device for generating and decoding a wake-up frame.

Background technique

Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging and broadcast. In a typical wireless communication system, an access point may support communication with multiple sites by sharing available system resources (eg, bandwidth, transmit power). These sites may be mobile terminals, sensors, smart devices, meters, instruments, monitors, and devices, among others. These stations are usually powered by batteries and have very limited battery life. In order to save power, the stations often put the main circuit into a sleep state, and only keep the low-power wake-up receiver in a working state. When the wake-up receiver receives the wake-up frame sent by the access point, it decodes the wake-up frame to obtain the identity of the site carried by the wake-up frame, and judges whether the identity of the site carried in the wake-up frame is the identity of the local site, and if so, then The wake-up receiver wakes up the main circuit from the sleep state to the working state.

In the process of research and practice, the inventor of the present invention found that with the development of society, various communication requirements are increasing day by day, and the number of sites under the jurisdiction of the access point is also increasing accordingly, and the access point needs to send A large number of wake-up frames cause the station to spend a lot of energy in decoding wake-up frames.

SUMMARY OF THE INVENTION

The technical problem to be solved by the embodiments of the present invention is to provide a method and apparatus for generating and decoding a wake-up frame, so as to reduce the energy consumed by a station in decoding the wake-up frame.

In a first aspect, the present invention provides a wake-up frame generation method, comprising:

The access point constructs a wake-up frame of the first mode, wherein the wake-up frame includes a preamble portion, the preamble portion includes a preamble portion, and the preamble portion is located at the beginning of the wake-up frame, and the first mode of the wake-up frame includes a preamble portion. The preamble part of the wake-up frame implicitly carries the identity of the site;

The access point sends the wakeup frame of the first mode to the station.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the access point constructing the wake-up frame of the first mode includes:

receiving, by the access point, a downlink channel response reported by the station;

The access point modulates the amplitude and/or phase of the preamble part according to the downlink channel response reported by the station to implicitly carry the identity of the station in the preamble part, so as to obtain the first part. A pattern of wake-up frames.

With reference to the first possible implementation manner of the first aspect, in the second possible implementation manner of the first aspect, the access point performs an amplitude and/or analysis on the preamble part according to the downlink channel response reported by the station. Or the modulation of the phase to carry the identification of the site implicitly in the preamble part, so as to obtain the wake-up frame of the first mode specifically:

The access point processes the preamble part according to formula (1) according to the downlink channel response reported by the station to implicitly carry the identity of the station in the preamble part, so as to obtain the first mode wakeup frame;

为下行信道响应的相位响应，

为所述第一模式的唤醒帧的前导码部分。Among them, M is the preamble part, IF{} is the fast Fourier transform FFT transform expression, and, IF{M}∈R,

is the phase response of the downlink channel response,

is the preamble part of the wake-up frame of the first mode.

With reference to any of the above possible implementation manners of the first aspect, in a third possible implementation manner of the first aspect, the wake-up frame includes a mode indication part, wherein when the mode indication part is a first value, The wake-up frame is the first mode, and the wake-up frame is the second mode when the mode indicating part is a second value.

With reference to the third possible implementation manner of the first aspect, in the fourth possible implementation manner of the first aspect, the wake-up frame further includes a payload part,

When the wake-up frame is in the second mode, the non-preamble part of the preamble part explicitly carries the identification of the station, and/or the payload part carries the identification of the station.

With reference to the fourth possible implementation manner of the first aspect, in the fifth possible implementation manner of the first aspect, after the access point sends the wake-up frame of the first mode to the station, the method further includes:

If the access point cannot wake up the station within the first time period, the access point sends a wakeup frame of the second mode to the station.

In a second aspect, the present invention provides a wake-up frame decoding method, comprising:

The target station receives the wake-up frame of the first mode sent by the access point, wherein the wake-up frame includes a preamble part, the preamble part includes a preamble part, and the preamble part is located at the beginning of the wake-up frame, the The preamble part of the wake-up frame of the first mode implicitly carries the identification of the station;

decoding the preamble part of the wake-up frame of the first mode to obtain the identity of the site;

Determine whether the identity of the site is the identity of the target site;

If it is not the identification of the target station, stop decoding the remaining part of the wake-up frame of the first mode except for the preamble.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the preamble part of the wake-up frame of the first mode implicitly carries the identity of the station by means of amplitude and/or phase modulation.

In combination with the first possible implementation manner of the second aspect, in the second possible implementation manner of the second aspect, the preamble part of the wake-up frame of the first mode implicitly carries the logo,

为下行信道响应的相位响应，

为所述第一模式的唤醒帧的前导码部分。Among them, M is the preamble part, IF{} is the FFT transform expression, and IF{M}∈R,

is the phase response of the downlink channel response,

is the preamble part of the wake-up frame of the first mode.

With reference to any of the above possible implementation manners of the second aspect, in a third possible implementation manner of the second aspect, the wake-up frame includes a mode indication part, wherein, when the mode indication part is a first value, The wake-up frame is the first mode, and the wake-up frame is the second mode when the mode indicating part is a second value.

With reference to the third possible implementation manner of the second aspect, in the fourth possible implementation manner of the second aspect, the wake-up frame further includes a payload part,

When the wake-up frame is in the second mode, the non-preamble part of the preamble part explicitly carries the identity of the station, and/or the payload part carries the identity of the station.

With reference to the fourth possible implementation manner of the second aspect, in the fifth possible implementation manner of the second aspect, if the target station cannot be woken up by the access point within the first time period, the target station The station receives the wake-up frame of the second mode sent by the access point.

In a third aspect, an apparatus for generating a wake-up frame is provided, comprising: a construction module and a sending module,

The construction module is configured to construct a wake-up frame of the first mode, wherein the wake-up frame includes a preamble portion, the preamble portion includes a preamble portion, and the preamble portion is located at the beginning of the wake-up frame, and the first The preamble part of the wake-up frame of a mode implicitly carries the identity of the station;

The sending module is configured to send the wake-up frame of the first mode to the station.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the construction module includes a receiving unit and a construction unit,

The receiving unit is configured to receive the downlink channel response reported by the station;

The construction unit is configured to perform amplitude and/or phase modulation on the preamble part according to the downlink channel response reported by the station to implicitly carry the identity of the station in the preamble part, so as to obtain the Wake-up frame for the first mode.

With reference to the first possible implementation manner of the third aspect, in the second possible implementation manner of the third aspect, the construction unit is configured to perform the preamble part according to the formula ( 1) processing is carried out to carry the identification of the site implicitly in the preamble part, thereby obtaining the wake-up frame of the first pattern;

为下行信道响应的相位响应，

为所述第一模式的唤醒帧的前导码部分。Among them, M is the preamble part, IF{} is the fast Fourier transform FFT transform expression, and, IF{M}∈R,

is the phase response of the downlink channel response,

is the preamble part of the wake-up frame of the first mode.

With reference to any of the above possible implementation manners of the third aspect, in a third possible implementation manner of the third aspect, the wake-up frame includes a mode indication part, wherein when the mode indication part is a first value, The wake-up frame is the first mode, and the wake-up frame is the second mode when the mode indicating part is a second value.

With reference to the third possible implementation manner of the third aspect, in a fourth possible implementation manner of the third aspect, the wake-up frame further includes a payload part,

When the wake-up frame is in the second mode, the non-preamble part of the preamble part explicitly carries the identification of the station, and/or the payload part carries the identification of the station.

With reference to the fourth possible implementation manner of the third aspect, in a fifth possible implementation manner of the third aspect, the sending module is further configured to wake up the station when the access point fails to wake up within the first time period , sending a wake-up frame of the second mode to the station.

In a fourth aspect, the present invention provides a wake-up frame decoding device, comprising: a receiving module, a decoding module, a judging module and a stopping module,

The receiving module is configured to receive the wake-up frame of the first mode sent by the access point, wherein the wake-up frame includes a preamble part, the preamble part includes a preamble part, and the preamble part is located at the beginning of the wake-up frame part, the preamble part of the wake-up frame of the first mode implicitly carries the identity of the site;

The decoding module is configured to decode the preamble part of the wake-up frame of the first mode to obtain the identification of the site;

The judging module is used to judge whether the identification of the site is the identification of the target site;

The stopping module is configured to stop decoding the remaining part of the wake-up frame of the first mode except the preamble when it is not the identification of the target station.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the preamble part of the wake-up frame of the first mode implicitly carries the identity of the station by means of amplitude and/or phase modulation.

With reference to the first possible implementation manner of the fourth aspect, in the second possible implementation manner of the fourth aspect, the preamble part of the wake-up frame of the first mode implicitly carries the logo,

为下行信道响应的相位响应，

为所述第一模式的唤醒帧的前导码部分。Among them, M is the preamble part, IF{} is the FFT transform expression, and IF{M}∈R,

is the phase response of the downlink channel response,

is the preamble part of the wake-up frame of the first mode.

With reference to any of the above possible implementation manners of the fourth aspect, in a third possible implementation manner of the fourth aspect, the wake-up frame includes a mode indication part, wherein when the mode indication part is a first value, The wake-up frame is the first mode, and the wake-up frame is the second mode when the mode indicating part is a second value.

With reference to the third possible implementation manner of the fourth aspect, in the fourth possible implementation manner of the fourth aspect, the wake-up frame further includes a payload part,

When the wake-up frame is in the second mode, the non-preamble part of the preamble part explicitly carries the identity of the station, and/or the payload part carries the identity of the station.

With reference to the fourth possible implementation manner of the fourth aspect, in a fifth possible implementation manner of the fourth aspect, the receiving module is configured to receive the received information when the access point cannot be woken up within the first time period. The wake-up frame of the second mode sent by the access point.

In a fifth aspect, an access point is provided, including: a processor, a memory, a communication interface, and a bus; the processor, the memory, and the communication interface are connected through the bus and complete mutual communication; the The memory stores executable program codes; the processor runs a program corresponding to the executable program codes by reading the executable program codes stored in the memory, so as to execute a wake-up frame generation method; wherein, The method is the method according to any one of the first aspects.

In a sixth aspect, a site is provided, including: a processor, a memory, a communication interface, and a bus; the processor, the memory, and the communication interface are connected through the bus and complete mutual communication; the memory stores executable program code; the processor runs a program corresponding to the executable program code by reading the executable program code stored in the memory, so as to execute a wake-up frame decoding method; wherein, the The method is the method of any one of the second aspects.

In a seventh aspect, the present invention provides a computer-readable storage medium storing program codes for wake-up frame generation executed by a computing device. The program code includes instructions for performing the method of any of the first aspects.

In an eighth aspect, the present invention provides a computer-readable storage medium, where the computer-readable storage medium stores program codes executed by a computing device for decoding a wake-up frame. The program code includes instructions for performing the method of any of the second aspects.

By implementing the embodiment of the present invention, the access point can implicitly carry the identification of the station in the preamble part at the beginning of the wake-up frame. After decoding the preamble of the wake-up frame, the station can obtain the identification of the station, and after determining the station When the ID of the site is not the ID of the site, stop decoding the wake-up frame, thereby reducing the energy consumed by the site in decoding the wake-up frame.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

1 is a schematic structural diagram of a network architecture to which an embodiment of the present application is applied;

2 is a schematic diagram of a frame structure of a wake-up frame used in an embodiment of the present application;

FIG. 3 is an interaction diagram of a site wake-up method proposed by an embodiment of the present application;

4 is a schematic diagram of an access point waking up a station STA1 in a wake-up frame decoding method proposed by an embodiment of the present application;

5 is an interaction diagram of another site wake-up method proposed by an embodiment of the present application;

6 is a schematic diagram of a frame structure of another wake-up frame used in an embodiment of the present application;

7 is a schematic structural diagram of an apparatus for generating a wake-up frame according to an embodiment of the present invention;

8 is a schematic structural diagram of a wake-up frame decoding apparatus provided by an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of an access point provided by an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a site provided by an embodiment of the present invention.

Detailed ways

It should be noted that the terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. As used in the embodiments of the present invention and the appended claims, the singular forms "a," "the," and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It will also be understood that the term "and/or" as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

In order to facilitate the understanding of the solution, the following first describes the network architecture to which the solutions of the embodiments of the present application are applied by way of example with reference to the relevant drawings. As shown in FIG. 1 , the network architecture to which the embodiments of the present application are applied includes an access point (AP) 110 and a plurality of stations (stations) 120 . The network architecture of the present invention is suitable for wireless local area network (Wireless Local Area Networks, WLAN), Bluetooth (Bluetooth) wireless personal area network, ZigBee networking, Internet of things (Internet of things, IoT) and other networking modes. The Internet of Things may be any one of an Internet of Vehicles (Internet of Vehicles), a Body Area Network (BAN), and an M2M (machine-to-machine) network.

It can be understood that the actual product names of the access points and stations mentioned in the embodiments of this application may be different from different manufacturers. For example, in a Bluetooth wireless personal area network, the access point may be called the master device, Sites may be called slaves, etc., of course, the change in product name does not affect the essence of the access point and site.

When the access point wakes up multiple sites in a unicast manner, the access point will send multiple wake-up frames, wherein each wake-up frame carries the identifier of the corresponding site. For a single station, the station must receive all the wake-up frames sent by the access point, decode all the wake-up frames, and obtain the identification of the station carried in the wake-up frame. Wake yourself up. In this process, the station decodes a large number of wake-up frames before there is a wake-up frame that actually wakes up itself. The energy of the site is expended enormously.

As shown in FIG. 2 , the wake-up frame defined by the wireless communication protocol 802.11ax generally includes: a preamble part (Preamble), a header part (Header) and a payload part (Payload). Among them, the preamble part is mainly used to determine when to send and receive data between the station and the access point, to inform other stations to avoid collision when transmission is in progress, and to transmit synchronization signals and frame intervals at the same time. The header part is used to transmit some important data, such as payload length, transmission rate, service and other information. The payload part is used to transmit the actual data.

The preamble part mainly includes a preamble and a signaling field. The preamble includes a short training field (STF) and a long training field (LTF). The short training field includes multiple repeated symbols used for packet start detection, automatic gain control (AGC) settings, initial frequency offset estimation, and initial time synchronization. The long training field also includes multiple repeated symbols for channel estimation, more accurate frequency offset estimation, and time synchronization. The signaling field is used to carry the rate and length information of the packet.

In order to reduce the energy consumed by decoding the wake-up frame, it is necessary to carry the identification of the site as much as possible at the beginning of the wake-up frame, so that after decoding the identification of the site, the station can determine that the identification of the site is not its own according to the identification of the obtained site. , you can stop decoding the wakeup frame and discard the wakeup frame. In the most ideal state, the identification of the station is carried in the preamble part at the beginning of the wake-up frame, which can minimize the energy consumed by decoding the wake-up frame. However, since the preamble is used for synchronization, the content of the preamble cannot be changed. Therefore, the next best thing is to carry the site identifier in the part after the preamble.

In order to further reduce the energy consumed by decoding the wake-up frame, an embodiment of the present application provides a station wake-up method. As shown in FIG. 3 , the station wake-up method provided by the embodiment of the present application includes:

210: The access point constructs a wake-up frame, wherein the wake-up frame includes a preamble portion, the preamble portion includes a preamble portion, and the preamble portion is located at the beginning of the wake-up frame, and the preamble portion of the wake-up frame Implicitly carries the identity of the site.

In this embodiment of the present invention, an access point may also be referred to as a "hotspot". The access point may be used to form a wireless local area network, provide access services for multiple sites, and is a bridge connecting wireless networks and wired networks. An access point can be an access device dedicated to providing access services, such as a wireless router, etc., or it can be a terminal device that temporarily provides access services, such as a smartphone or tablet capable of providing access services. Computers, notebook computers, etc., are not specifically limited in the present invention.

In the embodiment of the present invention, the wake-up frame may be a MAC frame following a wireless communication protocol, for example, a MAC frame of the 802.11, 802.15, 802.16 and 802.20 protocols, or may be a self-defined data frame independent of the wireless communication protocol, which is not specified in the present invention. limited. For the sake of simplicity, the following description is given by taking the wake-up frame as an example of a MAC frame conforming to the 802.11ax protocol (for details, please refer to FIG. 2 and related descriptions).

220: The access point sends the wake-up frame to the station. Accordingly, the station receives the wake-up frame sent by the access point.

In this embodiment of the present invention, the site may be various terminal devices, for example, mobile terminals such as smart phones, tablet computers, and notebook computers, and smart glasses, smart watches, and smart necklaces. Wearable devices can be smart home devices such as smart microwave ovens, smart air conditioners, and smart refrigerators, or IoT devices such as smart water meters, smart electricity meters, and smart gas meters, which are not specifically limited in the present invention.

230: The station decodes the preamble part of the wake-up frame to obtain the identity of the station.

240: The site determines whether the identity of the site is the identity of the target site.

250: If it is not the identification of the target station, the station stops decoding the wake-up frame.

In the embodiment of the present invention, the preamble part of the wake-up frame implicitly carries the identification of the station means that the repeated symbols carried in the preamble part of the wake-up frame do not change, but the station's identity is changed in other ways. The identifier is carried in the preamble part of the wake-up frame and does not affect the synchronization function of the preamble part itself.

In some possible implementations, the access point may implicitly carry the identity of the station in the preamble part by modulating the amplitude and/or phase of the preamble part. It can be understood that changes in the amplitude and/or phase of the preamble part will not affect the value of the repeated symbols in the preamble part, and therefore will not affect the synchronization function of the preamble part.

In a first specific implementation manner, the identifier of the station may be an amplitude change value and/or a phase change value pre-agreed between the access point and the station. In this case, the station needs an additional circuit to preamble the wake-up frame. The code part is demodulated to obtain the identity of the station.

In the second specific implementation manner, the identifier of the station may be the downlink channel response between the access point and the station, or the estimated value of the downlink channel response between the access point and the station, which is not distinguished here. , collectively referred to as the downlink channel response between the access point and the station. Specifically, the access point receives the downlink channel response reported by the station, and then the access point performs processing according to formula (1) according to the downlink channel response reported by the station to implicitly identify the station's identity carried in the preamble part to obtain the wake-up frame;

为下行信道响应的相位响应，

为所述唤醒帧的前导码部分。Among them, M is the preamble part, IF{} is the fast Fourier transform FFT transform expression, and, IF{M}∈R,

is the phase response of the downlink channel response,

is the preamble part of the wake-up frame.

Correspondingly, after receiving the wake-up frame through the downlink channel, the station demodulates the wake-up frame, and obtains the value of the real part and the value of the imaginary part of the preamble part in the frequency domain (it can be understood that it is implicitly carried in the preamble). The identification of the site of the code part), and judge whether the ratio of the value of the real part of the preamble part in the frequency domain to the value of the imaginary part is greater than the preset threshold, if the value of the real part of the preamble part in the frequency domain The ratio with the value of the imaginary part is greater than the preset threshold, then it is judged that the identity of the site is the identity of the target site, if the ratio of the value of the real part of the preamble part in the frequency domain to the value of the imaginary part is less than or equal to the preset value. If the threshold is set, it is determined that the identity of the site is not the identity of the target site.

As an example to illustrate, as shown in Figure 4, it is assumed that there are two stations STA1 and STA2 with independent time-invariant channels in the network, and report downlink channel responses H ₁ (ω) and H ₂ ( ω). When the AP needs to wake up the station STA1, the downlink channel response H ₁ (ω) is implicitly carried in the preamble part as the identification of the station STA1 through the second specific implementation manner, so as to obtain the wake-up frame 1, wherein after processing The leading part of the obtained wake-up frame 1 is denoted as

Wake-up frame 1 is received by station STA1 through downlink channel 1. After decoding, the obtained preamble of wake-up frame 1 is:

That is, the value of the real part of the leading part of the wake-up frame 1 is IF{M}×|H ₁ (ω)|, and the value of the imaginary part is approximately zero. Therefore, the energy value of the real part of the leading part of the wake-up frame 1 is much larger than the energy value of the imaginary part.

Wake-up frame 1 is received by station STA2 through downlink channel 2. After decoding, the obtained preamble of wake-up frame 1 is:

所以，唤醒帧1的前导部分的实部的能量值在统计上应约等于虚部的能量值。That is, the value of the real part of the leading part of the wake-up frame 1 is IF{M}×|H ₂ (ω)|, and the value of the imaginary part is approximately

Therefore, the energy value of the real part of the leading part of the wake-up frame 1 should be statistically approximately equal to the energy value of the imaginary part.

Therefore, an appropriate preset threshold can be set so that the ratio of the real part of the preamble part of the wake-up frame 1 received by the station STA1 to the energy value of the imaginary part in the frequency domain is greater than the preset threshold, and the station STA1 determines the wake-up frame 1. The carried site ID is its own ID, wake up the main circuit to enter the working state; the ratio of the value of the real part of the preamble part received by the site STA2 to the energy value of the imaginary part in the frequency domain is less than the preset threshold, and the site STA2 determines to wake up The station ID carried in frame 1 is not its own ID, stop decoding the wake-up frame, and discard the wake-up frame.

In order to avoid that the access point cannot wake up the station correctly due to the change of the downlink channel when the station is woken up in the manner shown in FIG. 3 , the embodiment of the present application also provides another method for waking up the station, and two modes of wake-up are set frame, when using the wake-up frame of the first mode to wake up the station fails, use the second wake-up frame to wake up the station. As shown in FIG. 5 , the site wake-up method provided by the embodiment of the present application includes:

301: The access point constructs a wake-up frame of the first mode.

In this embodiment of the present invention, the frame structure of the wake-up frame is self-defined, as shown in FIG. 6 , where the wake-up frame includes a preamble part, a mode indication (Preamble Mode Indication, PMI) part and a load part.

The preamble is also used to determine when data is sent and received between the station and the access point, inform other stations to avoid collisions when the transmission is in progress, and transmit synchronization signals and frame intervals at the same time. The preamble part may include both a preamble and a signaling field, wherein the preamble includes a short training field (STF) and a long training field (LTF). In order to further reduce the time required to decode the preamble, the preamble may or may only include a short training field (STF).

The mode indication (Preamble Mode Indication, PMI) part is used to indicate the mode of the wake-up frame. The PMI part may be multiple bits or one bit. In order to reduce the required time described in the decoding mode indication (Preamble Mode Indication, PMI) part, 1 bit may be used for representation. Wherein, when the mode indicating part is the first value, the wake-up frame is the first mode, and when the mode indicating part is the second value, the wake-up frame is the second mode. When the wake-up frame is in the first mode, the preamble part of the wake-up frame in the first mode implicitly carries the identification of the station; when the wake-up frame is in the second mode, the preamble part of the wake-up frame in the second mode The non-preamble part of , explicitly carries the identity of the site, and/or the payload part carries the identity of the site.

The load part is exactly the same as that in the previous embodiment, and will not be repeated here.

302: The access point sends the wake-up frame of the first mode to the station. Correspondingly, the station receives the wake-up frame of the first mode sent by the access point.

303: The station decodes the preamble part and the PMI part of the wake-up frame of the first mode to obtain the identity of the station.

304: The site determines whether the identity of the site is the identity of the target site.

305: If it is not the identification of the target station, the station stops decoding the wake-up frame of the first mode.

In this embodiment of the present invention, steps 302 to 305 are similar to 220 to 250 in the previous embodiment, the only difference is that the station decodes the preamble part and the PMI part of the wake-up frame of the first mode, instead of Only the preamble part of the wake-up frame of the first mode is decoded, and details are not repeated here.

In the embodiment of the present invention, the station decodes the PMI part of the wake-up frame of the first mode, thereby obtaining the value of the PMI part, which can be used to verify the decoded identifier of the station implicitly carried in the preamble, specifically: If the value of the PMI part is the first value, it is determined that the identification of the site obtained by the station through steps 303 and 304 is correct as the identification of the target site; if the value of the PMI part is the second value, it is determined that the station has passed the The result that the identification of the site obtained in steps 303 and 304 is the identification of the target site is wrong.

306: The access point determines whether to wake up the station within the first time period.

307: If the station cannot be woken up within the first time period, the access point constructs a wake-up frame of the second mode.

In this embodiment of the present invention, the first time period is a preset time period, which may be set according to actual needs. For example, the first time period may be set to 10 milliseconds, 30 milliseconds, 50 milliseconds, or 1 second, etc. .

308: The access point sends the wake-up frame of the second mode to the station. Correspondingly, the station receives the wake-up frame of the second mode sent by the access point.

309: The station decodes the entire wake-up frame of the second mode to obtain the identity of the station.

In this embodiment of the present invention, after decoding the entire wake-up frame of the second mode, the station obtains the obtained data from the non-preamble part of the preamble part and/or the payload part of the wake-up frame of the second mode. the site's identity.

310: The site determines whether the identity of the site is the identity of the target site.

311: If it is the identification of the target site, the site wakes up the main circuit to enter the working state.

The methods of the embodiments of the present invention are described in detail above. In order to facilitate better implementation of the above solutions in the embodiments of the present invention, correspondingly, related equipment for implementing the above solutions is also provided below.

As shown in FIG. 7 , an embodiment of the present invention further provides a schematic structural diagram of an apparatus for generating a wake-up frame. The wake-up frame generating apparatus 70 in this embodiment includes a construction module 710 and a transmission module 720 .

The construction module 710 is configured to construct a wake-up frame of the first mode, wherein the wake-up frame includes a preamble portion, the preamble portion includes a preamble portion, and the preamble portion is located at the beginning of the wake-up frame, the The preamble part of the wake-up frame of the first mode implicitly carries the identification of the station;

The sending module 720 is configured to send the wake-up frame of the first mode to the station.

Optionally, the constructing module 710 includes a receiving unit 711 and a constructing unit 712, the receiving unit 711 is configured to receive the downlink channel response reported by the site; the constructing unit 712 is configured to receive the downlink channel response reported by the site The wake-up frame of the first mode is obtained in response to the amplitude and/or phase modulation of the preamble part to implicitly carry the identity of the station in the preamble part.

Optionally, the construction unit 712 is configured to process the preamble part according to formula (1) according to the downlink channel response reported by the site to implicitly carry the identity of the site in the preamble part, Thereby, the wake-up frame of the first mode is obtained;

为下行信道响应的相位响应，

为所述第一模式的唤醒帧的前导码部分。Among them, M is the preamble part, IF{} is the fast Fourier transform FFT transform expression, and, IF{M}∈R,

is the phase response of the downlink channel response,

is the preamble part of the wake-up frame of the first mode.

Optionally, the wake-up frame includes a mode indication part, wherein when the mode indication part is a first value, the wake-up frame is the first mode, and when the mode indication part is a second value, The wake-up frame is the second mode.

Optionally, the wake-up frame further includes a payload part, and when the wake-up frame is in the second mode, the non-preamble part of the preamble part explicitly carries the identity of the site, and/or the payload part Carry the site's logo.

Optionally, the sending module 720 is further configured to send the wake-up frame of the second mode to the station when the access point cannot wake up the station within the first time period.

As shown in FIG. 8 , an embodiment of the present invention further provides a wake-up frame decoding apparatus. The wake-up frame decoding apparatus 80 includes: a receiving module 810 , a decoding module 820 , a judging module 830 and a stopping module 840 .

The receiving module 810 is configured to receive the wake-up frame of the first mode sent by the access point, wherein the wake-up frame includes a preamble part, the preamble part includes a preamble part, and the preamble part is located in the wake-up frame. In the beginning part, the preamble part of the wake-up frame of the first mode implicitly carries the identification of the station.

The decoding module 820 is configured to decode the preamble part of the wake-up frame of the first mode to obtain the identity of the station.

The judging module 830 is used to judge whether the identification of the site is the identification of the target site;

The stopping module 840 is configured to stop decoding the remaining part of the wake-up frame of the first mode except the preamble when it is not the identification of the target station.

Optionally, the preamble part of the wake-up frame of the first mode implicitly carries the identity of the station by means of amplitude and/or phase modulation.

Optionally, the preamble part of the wake-up frame of the first mode implicitly carries the identity of the site by means of formula 1,

为下行信道响应的相位响应，

为所述第一模式的唤醒帧的前导码部分。Among them, M is the preamble part, IF{} is the FFT transform expression, and IF{M}∈R,

is the phase response of the downlink channel response,

is the preamble part of the wake-up frame of the first mode.

Optionally, the wake-up frame includes a mode indication part, wherein when the mode indication part is a first value, the wake-up frame is the first mode, and when the mode indication part is a second value, The wake-up frame is the second mode.

Optionally, the wake-up frame further includes a payload part, and when the wake-up frame is in the second mode, the non-preamble part of the preamble part explicitly carries the identifier of the site, and/or the net load part is The payload part carries the identity of the site.

Optionally, the receiving module 810 is configured to receive the wake-up frame of the second mode sent by the access point when the access point cannot be woken up within the first time period.

An embodiment of the present invention further provides an apparatus (as shown in FIG. 9 ), which is used to implement the methods described in the foregoing embodiment in FIG. 3 and the embodiment in FIG. 5 . As shown in FIG. 9 , the apparatus 90 includes: a transmitter 903, a receiver 904, a memory 902, and a processor 901 coupled with the memory 902 (the number of processors 901 may be one or more, in FIG. 9, one processor is used as the processor 901). example). The transmitter 903, the receiver 904, the memory 902 and the processor 901 may be connected by a bus or in other ways (in FIG. 9, the connection by a bus is taken as an example). The transmitter 903 is used for sending data to the outside, and the receiver 904 is used for receiving data from the outside. The memory 902 is used to store program codes, and the processor 901 is used to call and execute the program codes stored in the memory 902 .

When the apparatus 90 is an access point, the program codes stored in the memory 902 are specifically used to implement the functions of the access point in the embodiment of FIG. 3 and the embodiment of FIG. 5 . Specifically, the processor 901 is configured to call the program code stored in the memory 902, and execute the following steps:

A wake-up frame of the first mode is constructed, wherein the wake-up frame includes a preamble portion, the preamble portion includes a preamble portion, and the preamble portion is located at the beginning of the wake-up frame, and the wake-up frame of the first mode is The preamble part implicitly carries the site's identity;

A wake-up frame of the first mode is sent to the station.

Optionally, receive a downlink channel response reported by the station;

The amplitude and/or phase of the preamble part is modulated according to the downlink channel response reported by the station to implicitly carry the identity of the station in the preamble part, so as to obtain the wake-up frame of the first mode .

Optionally, according to the downlink channel response reported by the station, the preamble part is processed according to formula (1) to implicitly carry the identity of the station in the preamble part, so as to obtain the first pattern. the wake-up frame;

为下行信道响应的相位响应，

为所述第一模式的唤醒帧的前导码部分。Among them, M is the preamble part, IF{} is the fast Fourier transform FFT transform expression, and, IF{M}∈R,

is the phase response of the downlink channel response,

is the preamble part of the wake-up frame of the first mode.

Optionally, the wake-up frame includes a mode indication part, wherein when the mode indication part is a first value, the wake-up frame is the first mode, and when the mode indication part is a second value, The wake-up frame is the second mode.

Optionally, the wake-up frame further includes a payload part, and when the wake-up frame is in the second mode, the non-preamble part of the preamble part explicitly carries the identity of the site, and/or the payload part Carry the site's logo.

Optionally, when the access point cannot wake up the station within the first time period, the access point sends a wake-up frame of the second mode to the station.

Please refer to FIG. 10. FIG. 10 is a schematic structural diagram of a site disclosed in an embodiment of the present invention. The site in this embodiment includes: at least one processor 1001, a communication interface 1002, a user interface 1003, and a memory 1004. The processor 1001, the communication interface 1002, the user interface 1003, and the memory 1004 may be connected through a bus or in other ways. This embodiment of the present invention Take the connection via bus 1005 as an example. in,

The processor 1001 may be a general-purpose processor, such as a central processing unit (Central Processing Unit, CPU).

Communication interface 1002 may be a wired interface (eg, an Ethernet interface) or a wireless interface (eg, a cellular network interface or using a wireless local area network interface) for communicating with other electronic devices or websites. In this embodiment of the present invention, the communication interface 1002 is specifically used to recommend the target recommendation object to the user of the electronic device.

Specifically, the user interface 1003 may be a touch panel, including a touch screen and a touch screen, for detecting operation instructions on the touch panel, and the user interface 1003 may also be a physical button or a mouse. The user interface 1003 may also be a display screen for outputting, displaying images or data.

The memory 1004 may include a volatile memory (Volatile Memory), such as a random access memory (Random Access Memory, RAM); the memory may also include a non-volatile memory (Non-Volatile Memory), such as a read-only memory (Read-Only Memory) , ROM), flash memory (Flash Memory), hard disk (Hard Disk Drive, HDD) or solid-state drive (Solid-State Drive, SSD); the memory 1004 may also include a combination of the above-mentioned types of memory. The memory 1004 is used to store a set of program codes, and the processor 1001 is used to call the program codes stored in the memory 1004, and perform the following operations:

receiving a wake-up frame of the first mode sent by the access point, wherein the wake-up frame includes a preamble part, the preamble part includes a preamble part, and the preamble part is located at the beginning of the wake-up frame, and the first The preamble part of the wake-up frame of the mode implicitly carries the identity of the station;

decoding the preamble part of the wake-up frame of the first mode to obtain the identity of the site;

Determine whether the identity of the site is the identity of the target site;

If it is not the identification of the target station, stop decoding the remaining part of the wake-up frame of the first mode except for the preamble.

Optionally, the preamble part of the wake-up frame of the first mode implicitly carries the identity of the station by means of amplitude and/or phase modulation.

Optionally, the preamble part of the wake-up frame of the first mode implicitly carries the identity of the site by means of formula 1,

为下行信道响应的相位响应，

为所述第一模式的唤醒帧的前导码部分。Among them, M is the preamble part, IF{} is the FFT transform expression, and IF{M}∈R,

is the phase response of the downlink channel response,

is the preamble part of the wake-up frame of the first mode.

Optionally, the wake-up frame includes a mode indication part, wherein when the mode indication part is a first value, the wake-up frame is the first mode, and when the mode indication part is a second value, The wake-up frame is the second mode.

Optionally, the wake-up frame further includes a payload part, and when the wake-up frame is in the second mode, the non-preamble part of the preamble part explicitly carries the identifier of the site, and/or the net load part is The payload part carries the identity of the site.

Optionally, if the target station cannot be woken up by the access point within the first time period, the target station receives the wakeup frame of the second mode sent by the access point.

By implementing the embodiment of the present invention, the access point can implicitly carry the identification of the station in the preamble part at the beginning of the wake-up frame. After decoding the preamble of the wake-up frame, the station can obtain the identification of the station, and after determining the station When the ID of the site is not the ID of the site, stop decoding the wake-up frame, thereby reducing the energy consumed by the site in decoding the wake-up frame.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented by instructing relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium. During execution, the processes of the embodiments of the above-mentioned methods may be included. The storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM), or a random access memory (Random Access Memory, RAM) or the like.

The above disclosure is only a preferred embodiment of the present invention, and of course, it cannot limit the scope of rights of the present invention. Those of ordinary skill in the art can understand that all or part of the process for realizing the above-mentioned embodiment can be realized according to the rights of the present invention. The equivalent changes required to be made still belong to the scope covered by the invention.

Claims (7)

1. a wake-up frame generation method, is characterized in that, comprises: The access point constructs a wake-up frame of the first mode, wherein the wake-up frame includes a preamble portion, the preamble portion includes a preamble portion, and the preamble portion is located at the beginning of the wake-up frame, and the first mode of the wake-up frame includes a preamble portion. The preamble part of the wake-up frame implicitly carries the identification of the station, wherein the preamble part includes a short training field STF or a long training field LTF; the wake-up frame includes a mode indication part, wherein, when the mode indication part is the first When the value is one, the wake-up frame is the first mode; when the mode indicating part is the second value, the wake-up frame is the second mode; when the wake-up frame is the second mode, the preamble The non-preamble part of the part explicitly carries the identity of the site, and/or the payload part carries the identity of the site; sending, by the access point, the wake-up frame of the first mode to the station; If the access point cannot wake up the station within the first time period, the access point sends a wake-up frame of the second mode to the station; The access point modulates the amplitude and/or phase of the preamble part according to the downlink channel response reported by the station to implicitly carry the identity of the station in the preamble part, so as to obtain the first part. The wake-up frame of a mode is as follows: The access point processes the preamble part according to formula (1) according to the downlink channel response reported by the station to implicitly carry the identity of the station in the preamble part, so as to obtain the first mode wakeup frame;

Among them, M is the preamble part, IF{} is the fast Fourier transform FFT transform expression, and, IF{M}∈R,

is the phase response of the downlink channel response,

is the preamble part of the wake-up frame of the first mode. 2. The method of claim 1, wherein the access point constructing the wake-up frame of the first mode comprises: receiving, by the access point, a downlink channel response reported by the station; The access point modulates the amplitude and/or phase of the preamble part according to the downlink channel response reported by the station to implicitly carry the identity of the station in the preamble part, so as to obtain the first part. A pattern of wake-up frames. 3. A wake-up frame decoding method, characterized in that, comprising: The target station receives the wake-up frame of the first mode sent by the access point, wherein the wake-up frame includes a preamble part, the preamble part includes a preamble part, and the preamble part is located at the beginning of the wake-up frame, the The preamble part of the wake-up frame of the first mode implicitly carries the identification of the station, wherein the preamble part includes a short training field STF or a long training field LTF, and the wake-up frame includes a mode indication part, wherein when the mode When the indication part is the first value, the wake-up frame is the first mode, when the mode indication part is the second value, the wake-up frame is the second mode, and when the wake-up frame is the second mode , the non-preamble part of the preamble part explicitly carries the identity of the site, and/or, the payload part carries the identity of the site; decoding the preamble part of the wake-up frame of the first mode to obtain the identity of the site; Determine whether the identity of the site is the identity of the target site; If it is not the identification of the target site, stop decoding the remaining part of the wake-up frame of the first mode except the preamble; If the target station cannot be woken up by the access point within the first time period, the target station receives the wake-up frame of the second mode sent by the access point; The preamble part of the wake-up frame of the first mode implicitly carries the identifier of the site by means of formula 1,

Among them, M is the preamble part, IF{} is the FFT transform expression, and IF{M}∈R,

is the phase response of the downlink channel response,

is the preamble part of the wake-up frame of the first mode. 4 . The method according to claim 3 , wherein the preamble part of the wake-up frame of the first mode implicitly carries the identity of the station by means of amplitude and/or phase modulation. 5 . 5. A wake-up frame generation device, characterized in that, comprising: a construction module and a transmission module, The construction module is configured to construct a wake-up frame of the first mode, wherein the wake-up frame includes a preamble portion, the preamble portion includes a preamble portion, and the preamble portion is located at the beginning of the wake-up frame, and the first The preamble part of the wake-up frame of a mode implicitly carries the identification of the station, wherein the preamble part includes a short training field STF or a long training field LTF; the wake-up frame includes a mode indication part, wherein when the mode indicates When the part is the first value, the wake-up frame is the first mode; when the mode indicating part is the second value, the wake-up frame is the second mode; when the wake-up frame is the second mode, The non-preamble part of the preamble part explicitly carries the identity of the site, and/or, the payload part carries the identity of the site; The sending module is configured to send the wake-up frame of the first mode to the station; The sending module is further configured to send a wake-up frame of the second mode to the station when the access point cannot wake up the station within the first time period; The construction module includes a receiving unit and a construction unit; The receiving unit is configured to receive the downlink channel response reported by the station; The construction unit is configured to perform amplitude and/or phase modulation on the preamble part according to formula (1) according to the downlink channel response reported by the site to implicitly carry the identity of the site in the preamble part , so as to obtain the wake-up frame of the first mode;

Among them, M is the preamble part, IF{} is the fast Fourier transform FFT transform expression, and, IF{M}∈R,

is the phase response of the downlink channel response,

is the preamble part of the wake-up frame of the first mode. 6. A wake-up frame decoding device, comprising: a receiving module, a decoding module, a judging module and a stopping module, The receiving module is configured to receive the wake-up frame of the first mode sent by the access point, wherein the wake-up frame includes a preamble part, the preamble part includes a preamble part, and the preamble part is located at the beginning of the wake-up frame part, the preamble part of the wake-up frame of the first mode implicitly carries the identification of the station, wherein the preamble part includes a short training field STF or a long training field LTF; the wake-up frame includes a mode indication part, wherein, When the mode indication part is the first value, the wake-up frame is the first mode; when the mode indication part is the second value, the wake-up frame is the second mode; when the wake-up frame is In the second mode, the non-preamble part of the preamble part explicitly carries the identity of the site, and/or the payload part carries the identity of the site; The decoding module is configured to decode the preamble part of the wake-up frame of the first mode to obtain the identification of the site; The judging module is used to judge whether the identification of the site is the identification of the target site; The stopping module is configured to stop decoding the remaining part of the wake-up frame of the first mode except the preamble when it is not the identification of the target site; The receiving module is configured to receive the wake-up frame of the second mode sent by the access point when the access point cannot be woken up within the first time period; The preamble part of the wake-up frame of the first mode implicitly carries the identifier of the site by means of formula 1,

Among them, M is the preamble part, IF{} is the FFT transform expression, and IF{M}∈R,

is the phase response of the downlink channel response,

is the preamble part of the wake-up frame of the first mode. 7 . The apparatus according to claim 6 , wherein the preamble part of the wake-up frame of the first mode implicitly carries the identity of the station by means of amplitude and/or phase modulation. 8 .

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