CN113852444B - RF wireless wake-up method - Google Patents
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 230000005540 biological transmission Effects 0.000 claims abstract description 14
- 238000001514 detection method Methods 0.000 claims description 29
- 238000004891 communication Methods 0.000 claims description 14
- 238000010276 construction Methods 0.000 claims description 2
- 238000004590 computer program Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 230000004622 sleep time Effects 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 230000002618 waking effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0061—Error detection codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
- H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/20—Manipulation of established connections
- H04W76/27—Transitions between radio resource control [RRC] states
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2209/00—Arrangements in telecontrol or telemetry systems
- H04Q2209/60—Arrangements in telecontrol or telemetry systems for transmitting utility meters data, i.e. transmission of data from the reader of the utility meter
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses an RF wireless wake-up method and a system, wherein the method comprises the following steps: acquiring an RF wireless wake-up frame, adding a wake-up node mark in the wake-up frame, and generating a modified wake-up frame; transmitting the modified wake-up frame to at least one receiving node, and obtaining a wake-up node mark of the modified wake-up frame by the receiving node; judging whether the obtained wake-up node mark is consistent with the current receiving node or not; and if the wake-up node mark is consistent with the current receiving node, executing wake-up operation. According to the method and the system, the mark of the target node is added in the wake-up frame according to the idle time length between different frames, so that whether the wake-up node is self is identified under the condition that the transmission time length is not increased, if yes, the node executes wake-up meter reading operation, if not, the node directly enters a sleep mode, and therefore the running time after false wake-up is shortened, and further power consumption is reduced.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to an RF wireless wake-up method.
Background
In low power consumption applications of RF communications, the transmitting end continuously transmits a wakeup frame before reading data. The awakened node knows the target node only at meter reading time. In low power applications of RF communication, the transmitting end may continuously transmit a wakeup frame, where the duration needs to cover 1 sleep time plus 2 active times of the node, and typically lasts 4 seconds. And after the non-target node is awakened, the sending end may need to read the meter after 4 seconds to find that the meter is not read. Running for this 4 second time wastes power consumption and the destination address cannot be informed during the stage of sending the wakeup frame, so that all nodes around which the wakeup frame is received are awakened.
Disclosure of Invention
One of the objects of the present invention is to provide an RF wireless wake-up method, where the method and system add a flag of a target node in a wake-up frame according to idle time lengths between different frames, so as to identify whether the wake-up node is itself under the condition of not increasing transmission time lengths, if yes, the node itself performs wake-up meter reading operation, and if not, directly enters a sleep mode, thereby reducing running time after false wake-up and further reducing power consumption.
Another object of the present invention is to provide an RF wireless wake-up method, where fields of a plurality of non-preamble codes in an RF wireless frame are replaced and disguised as preamble codes, and a part of bytes in the wireless frame are deleted to generate a pre-wake-up signal, so that the number of the preamble codes can be identified to determine whether to wake up, thereby improving the wake-up success rate.
Another object of the present invention is to provide an RF wireless wake-up method, where the method and system set a wake-up detection time, where the wake-up detection time has a sleep time between two adjacent RF wireless frames, and increase a detection time of at least one preamble, and at least one preamble can be detected as a wake-up condition under an RF wireless frame full camouflage condition, thereby greatly improving a wake-up success rate and efficiency.
To achieve at least one of the above objects, the present invention further provides an RF wireless wakeup method, the method comprising:
Acquiring an RF wireless wake-up frame, adding a wake-up node mark in the wake-up frame, and generating a modified wake-up frame;
transmitting the modified wake-up frame to at least one receiving node, and obtaining a wake-up node mark of the modified wake-up frame by the receiving node;
Judging whether the obtained wake-up node mark is consistent with the current receiving node or not;
And if the wake-up node mark is consistent with the current receiving node, executing wake-up operation.
According to one preferred embodiment of the present invention, a preamble in the RF radio wakeup frame is obtained, and other field data in the RF radio wakeup frame is replaced with the same value as the preamble, so as to disguise all RF radio wakeup frame data as the preamble.
According to another preferred embodiment of the present invention, the RF radio frame includes a preamble, an ID code field, a payload field, and a CRC field, wherein the RF radio wakeup frame deletes the CRC field and replaces the values of the ID code field and the payload field with the preamble values.
According to another preferred embodiment of the present invention, after the modified wake-up frame is sent to the receiving node, the receiving node performs a pre-wake-up operation, where the pre-wake-up operation method includes:
acquiring the preamble transmission time of an RF wireless wakeup frame;
acquiring idle time of an interval between two adjacent RF wireless frames;
Calculating pre-wake-up detection time, and detecting a preamble value in a wireless wake-up frame in the pre-wake-up detection time;
And if at least one preamble value exists, performing pre-wake-up operation of the receiving node.
According to another preferred embodiment of the present invention, the pre-wake-up detection time includes at least 2 preamble transmission times and at least 1 idle time, and field values of the same length are modified in the RF wireless wake-up frame to be the wake-up node flags according to the length of the idle time.
According to another preferred embodiment of the present invention, a pre-wake detection threshold is preset, if the number of preamble fields in the RF wireless wake frame detected by the receiving node is smaller than the pre-wake detection threshold, the receiving node performs a sleep operation, otherwise, the receiving node performs a pre-wake operation.
According to another preferred embodiment of the present invention, after performing the pre-wakeup operation of the receiving node, the wakeup node flag in the RF wireless wakeup frame is further detected and obtained, and whether the wakeup node flag is consistent with the node flag stored in the current pre-wakeup node is determined, if so, the wakeup operation of the current node is performed.
According to another preferred embodiment of the present invention, if the wake-up node flag in the RF wireless wake-up frame detected and acquired by the wake-up node is different from the node flag stored by the current pre-wake-up node, the current pre-wake-up node performs a sleep operation.
According to another preferred embodiment of the present invention, the method for calculating the pre-wake-up detection time includes:
calculating and acquiring the current RF wireless communication rate;
the number of bytes of the preamble field is calculated,
Calculating a preamble transmission rate according to the current RF wireless communication rate;
And calculating the idle time length of the interval between adjacent RF radio frames, and calculating the final pre-wake-up detection time according to the pre-wake-up detection time construction rule.
In order to achieve at least one of the above objects, the present invention further provides an RF wireless wake-up system that performs an RF wireless wake-up method as described above.
Drawings
Fig. 1 is a flow chart of an RF wireless wake-up method according to the present invention.
Detailed Description
The following description is presented to enable one of ordinary skill in the art to make and use the invention. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art. The basic principles of the invention defined in the following description may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.
It will be understood that the terms "a" and "an" should be interpreted as referring to "at least one" or "one or more," i.e., in one embodiment, the number of elements may be one, while in another embodiment, the number of elements may be plural, and the term "a" should not be interpreted as limiting the number.
Referring to fig. 1, a flow chart of an RF wireless wake-up method of the present invention is shown, which includes: acquiring an RF wireless frame and changing the RF wireless frame into an RF wireless wake-up frame which can be used for waking up, wherein the generating method of the RF wireless wake-up frame comprises the following steps:
Acquiring a Preamble (Preamble) field value, an ID code (identity code) field value and a payload field value of a current RF radio frame, wherein the 3 field values are sequentially ordered, and replacing the ID code field value and the payload field value according to the field value of the Preamble, for example, the field value of the Preamble is 0xAA, and the ID code field value and the payload field value are both (1011), and the field values of the succession of the replaced RF radio frame are: and 0xAA0xAA0xAA, and taking the continuous field value as the RF wireless wake-up frame for subsequent pre-wake-up and wake-up operations. The above substitution may make both the ID code field and the payload field disguised as the preamble, so that the duty ratio of the preamble is larger, and thus the wake-up step may be more accurate when the preamble is later determined.
In the conventional RF radio frame, a CRC (computed cyclic redundancy check) field value is further included, but in order to reduce data transmission pressure, in the present invention, the generated RF radio wakeup frame deletes the CRC (computed cyclic redundancy check) field value, only an ID code field and a payload field are reserved, and space occupied by a non-preamble is reduced.
It should be noted that, due to the limitation of the length of the RF radio frame, the wake-up operation needs to be performed by multi-frame transmission, that is, the length of the wake-up operation performed by the RF radio wake-up frame may be greater than the length of one preamble, and the idle time of the frame interval exists between the adjacent RF radio wake-up frames, because the continuous field value is identified by the identification action, the idle time also has a certain influence on the wake-up operation, so in order to improve the wake-up success rate and reduce the wake-up power consumption at the same time, the present invention sets the pre-wake-up operation. Wherein the idle time of the interval between adjacent RF radio frames is set to T idle, and a preamble detection time T Preamble is set, wherein the preamble detection time is the minimum time for a receiving node to detect a preamble, and the minimum time is generally the transmission time of the preamble in RF radio communication, and the pre-wake detection time T active is further calculated, wherein the pre-wake detection time T active＝n*TPreamble+Tidle is set to a value greater than 1, and wherein in a preferred embodiment of the present invention, the n parameter is set to 2. The pre-wakeup detection time is used for detecting field values of the RF radio wakeup frame, and because the ID code field value and the payload field value are replaced before and idle time of a frame interval is considered at the same time, the pre-wakeup detection time can detect at least one preamble at each time under normal conditions and is used for pre-waking up operation of a receiving node.
In one preferred embodiment of the present invention, a pre-wake detection threshold may be set, and if the number of preambles in the RF wireless wake frame detected in the pre-wake detection time is greater than the pre-wake detection threshold, then performing a pre-wake operation of the receiving node.
It should be noted that, the core of the present invention is that each time of wake-up operation, the current node can know the wake-up node flag, so as to avoid the occurrence of false wake-up operation at the receiving node, and the specific method is as follows: selecting a mark of a target receiving node which is pre-awakened, wherein the mark is unique in the same node cluster, and the marks of all the receiving nodes are preset and acquired, and each receiving node own mark is stored in own node for subsequent comparison and judgment. And replacing the field value in the current RF wireless wake-up frame with the mark of the selected target node, wherein the length of the mark can be set to be the byte length corresponding to the idle time between two adjacent RF wireless wake-up frames, the idle length is determined according to the RF wireless communication rate, and the higher the RF wireless communication rate is, the shorter the length of the corresponding mark is. After completing the replacement of the RF radio wakeup frame field value, the receiving node may acquire a modified RF radio wakeup frame field value, and determine whether a node flag identical to a current receiving node exists according to the modified RF radio wakeup frame field value, and if so, execute a wakeup operation, where the wakeup operation includes: the receiving node is awakened to start operation, response information is sent to the sending node, the sending node feeds back the real RF wireless frame to the awakened receiving node, the prior sending node sends data which are disguised as a Preamble and have no CRC field, the RF wireless frame which comprises a Preamble field value, an ID code field value, a payload field value and a CRC field value is obtained only after awakening, and the subsequent RF wireless frame which comprises but is not limited to electric energy meter reading behaviors is further executed.
Since the RF wireless communication rate affects the range of the pre-wake-up detection time, two embodiments are provided to illustrate the technical scheme of the present invention.
Embodiment one:
1. The sender sends a wake-up frame
The minimum frame interval is typically 0.2 ms, and in RF wireless 100Kbps rate communication, the time T byte for transmitting one byte is 8 bits/100 k=0.08 ms, subject to the limitation of RF radio frequency chips.
Then the T Preamble time is: t Preamble =4×0.08=0.32 ms
Then T active is:
Tactive＝2*TPreamble+Tidle
＝2*0.32+0.2
＝0.84ms
the interval time T idle may be the number of transmission bytes N:
N=t idle/0.08=0.2/0.08=2 where an integer is required and the integer value is not greater than the true value.
Further, a 2-byte address of the target receiving node can be added in the Payload field as a flag of the target node. The content of the wake-up frame is then:
Where xxxx is a2 byte flag of the address of the target receiving node. Here payload is 64 bytes, then the time T wake for sending a wakeup frame is:
Twake＝(4+4+64)*Tbyte
＝72*0.08
＝5.76ms
2. Receiving node receives wake-up frame
The receiving node also needs to configure the ID code to 0xAAAAAAAA and remove the CRC portion. When the receiving node detects the preamble code in the pre-wake active period, the receiving node wakes up, and enters a pre-wake stage.
Wherein the wake-up frame timing and the receive frame timing differ by 4 seconds +2*T active, and the sleep time T Sleep of the node is set to 4 seconds. The node will detect the air signal once every 4 seconds, which requires the sender to send a wakeup frame for a minimum duration of T Sleep+2*Tactive. Because of the limited length of one frame, in practice, M wakeup frames are sent during T Sleep+2*Tactive.
M＝(TSleep+2*Tactive)/(Twake+Tidle)
＝(4000+2*0.84)/(5.76+0.2)
＝671.4
=672 (Carry rounding is required here).
3. Receiving side judges wake-up frame
After the receiving node enters the pre-wake-up stage, waiting for receiving the wake-up frame, and judging whether the address mark information xxxx in the payload accords with the address of the receiving node. If so, the node enters a receive frame state. The node needs to restore the ID code field value to the original true value and open the CRC field to wait for the received data. If not, the node immediately enters sleep mode.
Embodiment two:
1. The sender sends a wake-up frame
The time T byte for transmitting one byte in RF wireless 50Kbps rate communication is 8 bits/50 k=0.16 ms, which is limited by the RF radio frequency chip, and the typical frame minimum interval is 0.2 ms.
Then the T Preamble time is: t Preamble =4×0.16=0.64 ms
Then T active is:
Tactive＝2*TPreamble+Tidle
＝2*0.64+0.2
＝1.48ms
the interval time T idle may be the number of transmission bytes N:
N=t idle/0.16=0.2/0.16=1 here an integer is required and the integer value is not greater than the true value.
Further, a 1-byte address of the target receiving node may be added to the Payload as a flag of the target receiving node. The content of the wake-up frame is then:
Where xx is a1 byte flag of the address of the target receiving node. Here payload is 64 bytes, then the time T wake for sending a wakeup frame is:
Twake＝(4+4+64)*Tbyte
＝72*0.16
＝11.52ms
2. Receiving wake-up frame by receiver
The receiving node also needs to configure the ID code to 0xAAAAAAAA and remove the CRC portion. When the receiving node detects the preamble code in the active period, the receiving node can wake up, and the pre-wake-up stage is entered.
Wherein the wake-up frame timing and the receive frame timing differ by 4 seconds +2*T active, here the Sleep time T Sleep of the node is set to 4 seconds. The node will detect the air signal once every 4 seconds, which requires the sender to send a wakeup frame for a minimum duration of T Sleep+2*Tactive. Because of the limited length of one frame, in practice, M wakeup frames are sent during T Sleep+2*Tactive.
M＝(TSleep+2*Tactive)/(Twake+Tidle)
＝(4000+2*1.48)/(11.52+0.2)
＝341.5
=342 (Carry rounding here)
3. Receiving side judges wake-up frame
After the node enters the pre-wake-up stage, waiting for receiving the wake-up frame, and judging whether the address mark information xx in the payload accords with the address of the node. If so, the node enters a receive frame state. The node needs to restore the ID code field to the original value and open the CRC field to wait for the received data. If not, the node immediately enters sleep mode.
In particular, according to embodiments of the present disclosure, the processes described above with reference to flowcharts may be implemented as computer software programs. For example, embodiments of the present disclosure include a computer program product comprising a computer program embodied on a computer readable medium, the computer program comprising program code for performing the method shown in the flowcharts. In such embodiments, the computer program may be downloaded and installed from a network via a communication portion, and/or installed from a removable medium. The above-described functions defined in the method of the present application are performed when the computer program is executed by a Central Processing Unit (CPU). The computer readable medium of the present application may be a computer readable signal medium or a computer readable storage medium, or any combination of the two. The computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the above. More specific examples of the computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wire segments, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. In the present application, however, the computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, with the computer-readable program code embodied therein. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wire, fiber optic cable, RF, etc., or any suitable combination of the foregoing.
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
It will be understood by those skilled in the art that the embodiments of the present invention described above and shown in the drawings are merely illustrative and not restrictive of the current invention, and that this invention has been shown and described with respect to the functional and structural principles thereof, without departing from such principles, and that any modifications or adaptations of the embodiments of the invention may be possible and practical.
Claims (6)
1. A method of RF wireless wakeup, the method comprising:
Acquiring an RF wireless wake-up frame, adding a wake-up node mark in the wake-up frame, and generating a modified wake-up frame;
transmitting the modified wake-up frame to at least one receiving node, and obtaining a wake-up node mark of the modified wake-up frame by the receiving node;
Judging whether the obtained wake-up node mark is consistent with the current receiving node or not;
if the wake-up node mark is consistent with the current receiving node, executing wake-up operation;
Acquiring a preamble in the RF wireless wakeup frame, and replacing other field data in the RF wireless wakeup frame with a value identical to the preamble, wherein the preamble is used for camouflage of all the RF wireless wakeup frame data into the preamble;
after the modified wake-up frame is sent to the receiving node, the receiving node executes a pre-wake-up operation, wherein the pre-wake-up operation method comprises the following steps:
acquiring the preamble transmission time of an RF wireless wakeup frame;
acquiring idle time of an interval between two adjacent RF wireless wakeup frames;
Calculating pre-wake-up detection time, and detecting a preamble value in a wireless wake-up frame in the pre-wake-up detection time;
if at least one preamble value exists, performing pre-wake-up operation of the receiving node;
the pre-wake-up detection time comprises at least 2 preamble transmission times and at least 1 idle time, and field values with the same length are modified in the RF wireless wake-up frame according to the length of the idle time to be the wake-up node mark.
2. The RF wakeup method according to claim 1, wherein the RF wakeup frame includes a preamble, an ID code field, a payload field, and a CRC field, wherein the RF wakeup frame deletes the CRC field and replaces the values of the ID code field and the payload field with the preamble values.
3. The method according to claim 1, wherein a pre-wakeup detection threshold is preset, if the number of preamble values in the RF wireless wakeup frame detected by the receiving node is smaller than the pre-wakeup detection threshold, the receiving node performs a sleep operation, otherwise the receiving node performs a pre-wakeup operation.
4. The method of claim 1, further comprising detecting the wake-up node flag in the RF wake-up frame after performing the pre-wake-up operation of the receiving node, and determining whether the wake-up node flag is identical to a node flag stored in the current pre-wake-up node, and if so, performing the wake-up operation of the current pre-wake-up node.
5. The method of claim 1, wherein if the wake-up node detects that the wake-up node flag in the acquired RF wireless wake-up frame is different from a node flag stored in a current pre-wake-up node, the current pre-wake-up node performs a sleep operation.
6. An RF wireless wakeup method according to claim 1, wherein,
The method for calculating the pre-wake-up detection time comprises the following steps:
calculating and acquiring the current RF wireless communication rate;
calculating the byte number of the preamble field;
calculating the preamble transmission time according to the current RF wireless communication rate and the byte number of the preamble field;
And calculating the idle time length of the interval between adjacent RF wireless wake-up frames, and calculating the final pre-wake-up detection time according to the preamble transmission time, the idle time length and the pre-wake-up detection time construction rule.
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