CN113645681B - Low-power consumption wireless wake-up method and system - Google Patents
Low-power consumption wireless wake-up method and system Download PDFInfo
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- CN113645681B CN113645681B CN202110912999.7A CN202110912999A CN113645681B CN 113645681 B CN113645681 B CN 113645681B CN 202110912999 A CN202110912999 A CN 202110912999A CN 113645681 B CN113645681 B CN 113645681B
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 108091006146 Channels Proteins 0.000 claims abstract description 50
- 230000000694 effects Effects 0.000 claims abstract description 47
- 238000001514 detection method Methods 0.000 claims abstract description 45
- 238000004891 communication Methods 0.000 claims description 19
- 230000002618 waking effect Effects 0.000 claims description 3
- 239000013078 crystal Substances 0.000 abstract description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 238000012937 correction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007958 sleep Effects 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- QVFWZNCVPCJQOP-UHFFFAOYSA-N chloralodol Chemical compound CC(O)(C)CC(C)OC(O)C(Cl)(Cl)Cl QVFWZNCVPCJQOP-UHFFFAOYSA-N 0.000 description 1
- 238000011960 computer-aided design Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005059 dormancy Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
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- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
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Classifications
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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
- H04W52/0248—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal dependent on the time of the day, e.g. according to expected transmission activity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
- H04W56/0015—Synchronization between nodes one node acting as a reference for the others
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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
Abstract
The disclosure provides a low-power consumption wireless wake-up method and a system, wherein a terminal acquires a channel activity detection period; the terminal divides each preset time period on the absolute time axis into a plurality of first time slices according to the channel activity detection period, and each first time slice is divided into a plurality of second time slices; the terminal sends the channel activity detection period, the time slice sequence number of the starting receiving time and the number of the second time slices to the master station; the master station divides an absolute time axis according to the channel activity detection period and the number of the second time slices, determines the position of the second time slices awakened by the terminal according to the time slice sequence numbers sent by the terminal, starts to send awakening codes by the preset number of second time slices in advance, and continuously sends at least three second time slices; the terminal acquires a wake-up code sent by the main station, and wakes up according to the received wake-up code; the method realizes time synchronization based on the mode of dividing time slices on an absolute time axis, and reduces the requirement on crystal oscillator precision.
Description
Technical Field
The disclosure relates to the technical field of wireless wakeup control, in particular to a low-power consumption wireless wakeup method and system.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
In the wireless communication application of the battery power supply of the internet of things, in order to prolong the service life of the battery, the terminal radio frequency cannot be in a receiving state all the time, and usually, a CAD (Channel Activity Detection ) technology is required to support the over-the-air wake-up.
As shown in fig. 1, T1 is a CAD period, T2 is a terminal radio frequency reception on time, and T3 is a period for the master station to wake up the terminal;
the power consumption brought by the terminal CAD is as follows: t2 is Irx/T1, irx is radio frequency reception state power consumption;
the power consumption brought by the primary station awakening the terminal is T1 x Itx/T3, and Itx is radio frequency emission state power consumption.
As can be seen from fig. 1, the radio frequency of the terminal starts receiving according to a very low duty cycle, so that the terminal can support over-the-air wake-up under the condition that the average power consumption is close to dormancy. However, in order to wake up the terminal, the master station needs to jump to the channel where the terminal is located to continuously transmit the wake-up code of the time T1. In the prior art, if frequent periodic wake-up of terminal communication (T3 determination) is required, the master station cannot achieve low power consumption, or the master station and the terminal cannot achieve low power consumption at the same time, the power consumption of the master station can be reduced by reducing T1, and the power consumption of the terminal can be increased; in addition, this way can wake up all terminal devices of the same channel in the coverage area of the signal, and the power consumption of other devices can be increased due to false wake-up.
The inventor finds that in many applications of the internet of things, the master station and the terminal can only be powered by a battery, and meanwhile, low power consumption is required, in order to solve the problems, the master station and the terminal are commonly used for accurately determining the time of starting CAD (computer aided design) each time by using the master station, and directly sending a T2 wake-up packet, but the accurate time synchronization needs frequent communication to increase the power consumption or needs accurate active crystal oscillator to increase the cost.
Disclosure of Invention
In order to solve the defects of the prior art, the present disclosure provides a low-power consumption wireless wake-up method and system, which perform rough time synchronization based on a time slice dividing manner on an absolute time axis, and can adopt an adaptive error correction method when in disconnection, thereby reducing power consumption, reducing the requirement on crystal oscillator precision, reducing time synchronization overhead, and being not affected by system restarting.
In order to achieve the above purpose, the present disclosure adopts the following technical scheme:
the first aspect of the present disclosure provides a low power wireless wake-up method.
A low-power consumption wireless wake-up method is applied to a terminal and comprises the following steps:
acquiring a channel activity detection period;
after being awakened by the master station for the first time, the time synchronization packet of the base station is received for timing so as to realize time synchronization with the master station;
dividing each preset time period on an absolute time axis into a plurality of first time slices according to a channel activity detection period, and dividing each first time slice into a plurality of second time slices;
transmitting the channel activity detection period, the time slice sequence number of the starting receiving time and the number of the second time slices to the master station;
and acquiring a wake-up code generated by the master station according to the received data, and waking up according to the received wake-up code.
Further, the sequence number of the sending time slice in the data packet issued by the master station is obtained, and time calibration is performed by combining the sequence number of the current time slice.
Further, the preset time period is one minute, and the channel activity detection period can be divided by 60.
Further, the master station divides an absolute time axis according to the channel activity detection period and the number of the second time slices, determines the position of the second time slices where the terminal wakes up according to the time slice serial numbers sent by the terminal, starts to send wake-up codes by the preset number of second time slices in advance, and continuously sends at least three second time slices.
A second aspect of the present disclosure provides a low power wireless wake-up method.
A low-power consumption wireless wake-up method is applied to a master station and comprises the following steps:
acquiring a channel activity detection period sent by a terminal, the number of second time slices and a time slice sequence number of the starting receiving time of the terminal;
continuously transmitting a wake-up code according to a channel activity detection period when communication is established for the first time, and then transmitting a time synchronization packet;
establishing a neighbor table with a terminal address as an index according to data sent by a terminal;
and determining the position of a second time slice of terminal awakening according to the terminal parameters in the neighbor list, starting to transmit an awakening code by a preset number of second time slices in advance to awaken the terminal, and continuously transmitting at least three second time slices.
Further, after the master station wakes up the terminal, the master station transmits the sequence number of the transmission time slice of the master station, and completes one time of time calibration synchronization.
Further, the terminal divides each preset time period on the absolute time axis into a plurality of first time slices according to the channel activity detection period, and each first time slice is divided into a plurality of second time slices.
Further, the preset time period is one minute, and the channel activity detection period can be divided by 60.
A third aspect of the present disclosure provides a low power wireless wake-up system.
A low power wireless wake-up system comprising: the terminal is in communication connection with the master station;
the terminal acquires a channel activity detection period;
the terminal divides each preset time period on the absolute time axis into a plurality of first time slices according to the channel activity detection period, and each first time slice is divided into a plurality of second time slices;
the terminal transmits the channel activity period, the time slice sequence number of the starting receiving time and the number of the second time slices to the master station;
the master station divides an absolute time axis according to the channel activity detection period and the number of the second time slices, determines the position of the second time slices awakened by the terminal according to the time slice sequence numbers sent by the terminal, starts to send awakening codes by the preset number of second time slices in advance, and continuously sends at least three second time slices;
the terminal acquires the wake-up code sent by the main station, and wakes up according to the received wake-up code.
Further, the preset time period is one minute, and the channel activity detection period can be divided by 60.
Further, after the master station wakes up the terminal, the master station transmits the sequence number of the transmission time slice of the master station, and completes one time of time calibration synchronization.
Further, when the communication between the master station and the terminal is unsuccessful, the number of time slices for transmitting the wake-up code is increased in the next wake-up.
Compared with the prior art, the beneficial effects of the present disclosure are:
1. according to the low-power consumption wireless wake-up method and system, time synchronization is achieved based on the mode of dividing time slices on an absolute time axis, the requirement on crystal oscillator precision is reduced, time synchronization overhead is reduced, and the influence of system restarting is avoided.
2. According to the low-power consumption wireless wake-up method and system, the master station can adapt to terminals with different wake-up periods, and can adopt the self-adaptive error correction method when the terminals are in disconnection, so that the communication reliability is improved under the goal of reducing power consumption, and the requirements of various power consumption and control instantaneity are met.
3. According to the low-power consumption wireless awakening method and system, the terminal and the master station which adopt wireless communication can realize low-power consumption battery power supply, the terminal is in a CAD mode, and the master station can judge the receiving time of the terminal, so that efficient low-power consumption awakening is realized, and the false awakening probability is reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate and explain the exemplary embodiments of the disclosure and together with the description serve to explain the disclosure, and do not constitute an undue limitation on the disclosure.
Fig. 1 is a schematic diagram of an on time sequence of a master station and a terminal provided in the background of the disclosure.
Fig. 2 is a schematic diagram of a low power wireless wake-up system provided in embodiment 1 of the present disclosure.
Detailed Description
The disclosure is further described below with reference to the drawings and examples.
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments in accordance with the present disclosure. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
Embodiments of the present disclosure and features of embodiments may be combined with each other without conflict.
Example 1:
embodiment 1 of the present disclosure provides a low power consumption wireless wake-up system, including: the terminal is in communication connection with the master station;
the terminal acquires a channel activity detection period;
the terminal divides each preset time period on the absolute time axis into a plurality of first time slices according to the channel activity detection period, and each first time slice is divided into a plurality of second time slices;
the terminal sends the channel activity detection period, the time slice sequence number of the starting receiving time and the number of the second time slices to the master station;
the master station divides an absolute time axis according to the channel activity detection period and the number of the second time slices, determines the position of the second time slices awakened by the terminal according to the time slice sequence numbers sent by the terminal, starts to send awakening codes by the preset number of second time slices in advance, and continuously sends at least three second time slices;
the terminal acquires the wake-up code sent by the main station, and wakes up according to the received wake-up code.
Specifically, the method comprises the following steps:
s1: when the master station and the terminal establish communication, the master station jumps to a channel where the terminal is located to continuously send a wake-up code of T1 time;
s2: the master station transmits own absolute time, and the time of the terminal receiving the master station completes time calibration, so that absolute clock synchronization is realized between the master station and the terminal;
s3: the terminal divides each minute on an absolute time axis into n large time slices (the requirement of T1 can be divided by 60) according to T1, each large time slice is divided into m small time slices (T4 is required to be larger than T2 and is required to be divided by T1 according to clock synchronization errors and clock errors generated by crystal oscillator errors in a period of T3), and a time slice sequence number q of the time T2 for starting the receiving of the terminal is determined, and T1, m and q are transmitted to the master station in reply of the master station;
the master station establishes a neighbor table with the address as an index according to the address and the parameters sent by the terminal;
s4: when the master station needs to wake up the terminal, dividing the size time slices according to the inquired neighbor table parameters of the terminal, determining the position of a small time slice of terminal wake-up, taking clock deviation into consideration, advancing one small time slice to start sending wake-up codes, continuously sending 3 small time slices, and ensuring to cover the terminal wake-up time; after the master station wakes up the terminal, the transmitted data contains own transmission time slice sequence number q2, so that one time of time calibration synchronization is completed (the communication delay is T5, the terminal knows that the current master station time slice sequence number is (q2+T5/T4)% m according to the q2 of the master station, and the absolute time of the terminal and the time slices are aligned nearby with the base station);
s5: when the communication between the master station and the terminal is unsuccessful, increasing the time for transmitting the wake-up code by 6 x T4 and 12 x T4 … until T1 when the master station and the terminal wake-up next time, and starting the process of establishing the communication in the step 1;
as shown in fig. 1, taking the conventional LoRa communication as an example, the terminal adopts an air rate of 3000bps, the CAD period T1 is 5 seconds, the receiving time T2 is 3ms, the receiving current is 5mA, the sleep current is 5uA, and the average current consumption is not considered to be 3ms, 5000uA/5000 ms+5ua=8ua.
In the normal mode, the host transmits 75mA of current, the wake-up needs to be continuously transmitted for 5 seconds, the sleep current is 5uA, the terminal needs to be wake-up once per hour (T3), and other consumption average currents are not considered to be 75000uA, 5 s/3600s+5uA=213 uA.
By adopting the strategy, taking the small time slice T4 as 0.25 seconds, the host wakes up the terminal for 5 seconds continuously after first time, and wakes up only for 0.75 seconds after time synchronization, and the average current in one day is as follows:
(75000uA*5s*1+75000uA*0.75s*23)/(3600s*24)+5uA＝24uA
in the heating field, the strategy described in this embodiment can implement a full wireless scheme from the base station to the user terminal: the household electric regulating valve can be used for wireless communication with battery power, the battery is difficult to replace and high in cost when being installed in a pipeline well, and the disposable lithium battery can be used for 6 years as a terminal; the base station of the cell is used as a master station to realize interaction between the valve and the background, so that the power consumption can be reduced, and the possibility is provided for realizing solar power supply; the indoor temperature control panel also needs battery power supply, so that a resident can conveniently control the valve and inquire valve data, and two dry batteries can be used for 2 years.
Example 2:
the embodiment 2 of the disclosure provides a low-power consumption wireless wake-up method, which is applied to a terminal and comprises the following steps:
acquiring a channel activity detection period;
after being awakened by the master station for the first time, the time synchronization packet of the base station is received for timing so as to realize time synchronization with the master station;
dividing each preset time period on an absolute time axis into a plurality of first time slices according to a channel activity detection period, and dividing each first time slice into a plurality of second time slices;
transmitting the channel activity detection period, the time slice sequence number of the starting receiving time and the number of the second time slices to the master station;
and acquiring a wake-up code generated by the master station according to the received data, and waking up according to the received wake-up code.
And acquiring a sending time slice sequence number in the data packet issued by the master station, and carrying out time calibration by combining the current time slice sequence number.
The preset period of time is one minute and the channel activity detection period can be divided by 60.
The master station divides an absolute time axis according to the channel activity detection period and the number of the second time slices, determines the position of the second time slices awakened by the terminal according to the time slice sequence numbers sent by the terminal, starts to send awakening codes by the preset number of second time slices in advance, and continuously sends at least three second time slices.
Example 3:
embodiment 3 of the present disclosure provides a low power consumption wireless wake-up method applied to a master station, including the following procedures:
acquiring a channel activity detection period sent by a terminal, the number of second time slices and a time slice sequence number of the starting receiving time of the terminal;
continuously transmitting a wake-up code according to a channel activity detection period when communication is established for the first time, and then transmitting a time synchronization packet;
establishing a neighbor table with a terminal address as an index according to data sent by a terminal;
determining the position of a second time slice of terminal awakening according to terminal parameters in a neighbor table, starting to transmit an awakening code in advance by a preset number of second time slices to awaken the terminal, and continuously transmitting at least three second time slices
After the master station wakes up the terminal, the master station sends the sequence number of the sending time slice to complete one time of time calibration synchronization.
And the terminal divides each preset time period on the absolute time axis into a plurality of first time slices according to the channel activity detection period, and each first time slice is divided into a plurality of second time slices.
The preset period of time is one minute and the channel activity detection period can be divided by 60.
The foregoing description of the preferred embodiments of the present disclosure is provided only and not intended to limit the disclosure so that various modifications and changes may be made to the present disclosure by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Claims (9)
1. A low-power consumption wireless wake-up method is characterized in that: the method is applied to the terminal and comprises the following steps:
acquiring a channel activity detection period;
after being awakened by the master station for the first time, the time synchronization packet of the base station is received for timing so as to realize time synchronization with the master station;
dividing each preset time period on an absolute time axis into a plurality of first time slices according to a channel activity detection period, and dividing each first time slice into a plurality of second time slices;
transmitting the channel activity detection period, the time slice sequence number of the starting receiving time and the number of the second time slices to the master station;
the method comprises the steps of obtaining a wake-up code generated by a master station according to received data, and waking up according to the received wake-up code;
the wake-up code generated by the master station according to the received data comprises: the master station divides an absolute time axis according to the channel activity detection period and the number of the second time slices, determines the position of the second time slices awakened by the terminal according to the time slice sequence numbers sent by the terminal, starts to send awakening codes by the preset number of second time slices in advance, and continuously sends at least three second time slices.
2. The low power wireless wakeup method of claim 1, wherein:
acquiring a sending time slice sequence number in a data packet issued by a master station, and carrying out time calibration by combining the current time slice sequence number;
or,
the preset period of time is one minute and the channel activity detection period can be divided by 60.
3. A low-power consumption wireless wake-up method is characterized in that: is applied to a master station and comprises the following procedures:
acquiring a channel activity detection period sent by a terminal, the number of second time slices and a time slice sequence number of the starting receiving time of the terminal;
continuously transmitting a wake-up code according to a channel activity detection period when communication is established for the first time, and then transmitting a time synchronization packet;
establishing a neighbor table with a terminal address as an index according to data sent by a terminal;
determining the position of a second time slice of terminal awakening according to terminal parameters in a neighbor table, starting to transmit an awakening code by a preset number of second time slices in advance to awaken the terminal, and continuously transmitting at least three second time slices;
the method comprises the following steps: the master station divides an absolute time axis according to the channel activity detection period and the number of the second time slices, determines the position of the second time slices awakened by the terminal according to the time slice sequence numbers sent by the terminal, starts to send awakening codes by the preset number of second time slices in advance, and continuously sends at least three second time slices.
4. The low power wireless wakeup method of claim 3, wherein:
after the master station wakes up the terminal, the master station sends the sequence number of the sending time slice to complete one time of time calibration synchronization;
or,
and the terminal divides each preset time period on the absolute time axis into a plurality of first time slices according to the channel activity detection period, and each first time slice is divided into a plurality of second time slices.
5. The low power wireless wakeup method of claim 4, wherein:
the preset period of time is one minute and the channel activity detection period can be divided by 60.
6. A low power wireless wake-up system, characterized by: comprising the following steps: the terminal is in communication connection with the master station;
the terminal acquires a channel activity detection period;
the terminal divides each preset time period on the absolute time axis into a plurality of first time slices according to the channel activity detection period, and each first time slice is divided into a plurality of second time slices;
the terminal transmits the channel activity period, the time slice sequence number of the starting receiving time and the number of the second time slices to the master station;
the master station divides an absolute time axis according to the channel activity detection period and the number of the second time slices, determines the position of the second time slices awakened by the terminal according to the time slice sequence numbers sent by the terminal, starts to send awakening codes by the preset number of second time slices in advance, and continuously sends at least three second time slices;
the terminal acquires the wake-up code sent by the main station, and wakes up according to the received wake-up code.
7. The low power wireless wake-up system of claim 6 wherein:
the preset period of time is one minute and the channel activity detection period can be divided by 60.
8. The low power wireless wake-up system of claim 6 wherein:
after the master station wakes up the terminal, the master station sends the sequence number of the sending time slice to complete one time of time calibration synchronization.
9. The low power wireless wake-up system of claim 6 wherein:
when the communication between the master station and the terminal is unsuccessful, the number of time slices for transmitting the wake-up code is increased at the next wake-up.
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| CN101860808A (en) * | 2010-06-13 | 2010-10-13 | 中兴通讯股份有限公司 | Method and system for timed group waiting of cluster terminal |
| CN102143564A (en) * | 2010-12-23 | 2011-08-03 | 华为技术有限公司 | Shutoff method and equipment for carrier-frequency time slot |
| KR20130141059A (en) * | 2012-06-15 | 2013-12-26 | 주식회사 더블유엔티 | Data transmission system and data transmission method |
| CN102932909A (en) * | 2012-10-08 | 2013-02-13 | 科立讯通信股份有限公司 | Digital common frequency broadcasting system and wireless judgment and synchronization method |
| CN110383783A (en) * | 2017-03-07 | 2019-10-25 | 华为技术有限公司 | The system and method that conflict is detected and slowed down using wake-up packet |
| CN108401281A (en) * | 2018-02-08 | 2018-08-14 | 宁夏隆基宁光仪表股份有限公司 | Wireless low-power consumption meter register method based on Channel Detection |
| CN112840589A (en) * | 2018-10-05 | 2021-05-25 | 高通股份有限公司 | Discontinuous reception wake-up operation with multiple component carriers |
| WO2020215234A1 (en) * | 2019-04-24 | 2020-10-29 | 天彩电子（深圳）有限公司 | Reliable low power-consumption communication method, apparatus and system |
| CN110996379A (en) * | 2019-11-29 | 2020-04-10 | 哈尔滨海能达科技有限公司 | Wake-up method, terminal node, transmission source node, and storage medium |
| CN110958676A (en) * | 2019-12-03 | 2020-04-03 | 成都亿佰特电子科技有限公司 | Low-power consumption dormancy equipment awakening method and system |
| CN111132286A (en) * | 2019-12-18 | 2020-05-08 | 京东方科技集团股份有限公司 | Data issuing method and device, electronic equipment and computer readable storage medium |
| CN111107617A (en) * | 2019-12-31 | 2020-05-05 | 展讯通信（上海）有限公司 | Data sending and receiving method, device, terminal and storage medium in ad hoc network |
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