CN106470469A - A kind of method of wireless senser time synchronized - Google Patents
A kind of method of wireless senser time synchronized Download PDFInfo
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- CN106470469A CN106470469A CN201510503370.1A CN201510503370A CN106470469A CN 106470469 A CN106470469 A CN 106470469A CN 201510503370 A CN201510503370 A CN 201510503370A CN 106470469 A CN106470469 A CN 106470469A
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- time
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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
- H04W52/0261—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level
- H04W52/0274—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by switching on or off the equipment or parts thereof
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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
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Abstract
This application discloses a kind of method of wireless senser time synchronized, it is characterized in that, including radio network gateway and at least one wireless senser, described wireless senser is set up with described radio network gateway has wireless channel to be connected, described radio network gateway was transmitted to described wireless senser instructing in cycle time calibration, described cycle time calibration includes WOR wake-up period and working cycle, and wireless senser is calibrated to its temporal by receiving the prover time bag of radio network gateway.
Description
Technical field
The application is related to sensor network technology field, more particularly to a kind of method of wireless senser time synchronized.
Background technology
Wireless sense network is formed by being deployed in substantial amounts of wireless sensor node in monitored area, one self-organizing network is formed by communication, time synchronized is the most basic demand in wireless sensor network, big multi-protocols used in wireless sensor network and application are required for carrying out time synchronized, and such as ranging localization, data transfer, cooperation transmission and process etc. are required to realize the synchronization of time.
Radio sensing network is a distributed system at present, the local zone time of each node is separate, the system time that this results in each node is different, but need each node cooperative work in network application, the initial data of individual node collection needs and other node data is uniformly processed and could obtain effective information, is required for the interdependent node retention time in data processing and data fusion process synchronous.Certainly in some data handling procedures, it is error free that we do not need the time to be accurate to millisecond, allowing in the range of certain error, the system time of each wireless senser can be because the change of running environment can lead to the time of wireless senser to be difficult to be consistent, the time leading to each node is easy to lose synchronization, simultaneously in time synchronization process, there is catabiotic defect in a large number in wireless senser, and especially wireless senser power consumption when being communicated with radio network gateway is very big.
Content of the invention
The application provides a kind of method of wireless senser time synchronized, is capable of radio network gateway and carries out time synchronized to wireless senser, and wireless senser has the function of low-power consumption in time synchronization process.
The application provides a kind of method of wireless senser time synchronized, including radio network gateway and at least one wireless senser, described wireless senser is set up with described radio network gateway has wireless channel to be connected, described radio network gateway is transmitted instruction and receiving data in cycle time calibration to described wireless senser, and described cycle time calibration includes WOR wake-up period and working cycle.
Wherein, it is provided with very first time window in described WOR wake-up period, in described WOR wake-up period：Described radio network gateway, when needed between calibrate when on described wireless channel broadcast packet contain unique encodings multiple wake-up packet；Described wireless senser, all keep resting state in addition to described very first time window, and in described very first time window, carrier sense is carried out to described wireless channel, if it find that carrier wave then starts to receive described wake-up packet, and enter the described working cycle after terminating current WOR wake-up period.
Wherein, described wireless senser, when described very first time window is monitored less than described wake-up packet, goes successively to next described WOR wake-up period after terminating current WOR wake-up period.
Wherein, the working cycle of described wireless senser includes first time period, second time period, before described first time period is located at described second time period, is provided with the second time window in described second time period.Within the described working cycle：Described wireless senser, confirm to waking up package informatin in described first time period, calculate to waking up package informatin in described second time window, mathematic interpolation is carried out with receiving time value according to the presynchronization duration comprising in wake-up packet, determine that radio network gateway sends the calibration bag time, position in described second time period for wherein said second time window is determined by described identification code, and when described wireless senser keeps resting state, described wireless senser is less than 5 μ A from the average current of described battery consumption；Described radio network gateway, is communicated with one or more wireless sensers on described wireless channel, realizes the time synchronized of one or more wireless sensers and radio network gateway.
Wherein, it is additionally provided with the 3rd time window in described second time period, after described 3rd time window is located at described second time window, wherein：Described wireless senser, monitors to described wireless channel in described 3rd time window, and to receive the calibration bag that described radio network gateway is broadcasted in described wireless channel, wherein said calibration includes unified timestamp.
Wherein, described wireless senser, after receiving described calibration bag, confirms to the timestamp in described calibration bag, and automatically calibrates itself wireless senser time to be allowed to be consistent with the radio network gateway time.
Wherein, if wireless senser does not receive calibration bag or automatically calibrates unsuccessfully after receiving calibration bag, next radio network gateway cycle time calibration is waited to be calibrated.
In such scheme, beneficial effects of the present invention are as follows：
1. the present invention is carried out unified time calibration between wireless senser by radio network gateway, the time difference of each wireless senser and standard time need not be calculated, only need to wireless senser and carry out time self calibration by calibrating the timestamp in wrapping, under conditions of ensureing certain time precision, reduce system power consumption；
2. wireless senser is only monitored in the very first time window of WOR wake-up period, just because required electric current under resting state is less than 5 μ A, therefore can reduce the power consumption of wireless senser in a dormant state in the other times of WOR wake-up period；
3. wireless senser determines the second time window using itself identification code, to reduce the probability that different radio sensor sends data to radio network gateway simultaneously, and then reduce the data collision even avoiding between wireless senser, improve the reliability that multiple wireless sensers are communicated with radio network gateway.
Brief description
Fig. 1 is a kind of schematic flow sheet of wireless senser method for synchronizing time；
Fig. 2 is a kind of structural representation of the embodiment of wireless senser method for synchronizing time；
Fig. 3 is radio network gateway current diagram in a kind of wireless senser method for synchronizing time one cycle；
Fig. 4 is wireless senser current diagram in a kind of wireless senser method for synchronizing time one cycle.
Specific embodiment
In below describing, in order to illustrate rather than in order to limit it is proposed that the detail of such as particular system structure, interface, technology etc, thoroughly to understand the application.However, it will be clear to one skilled in the art that the application can also be realized in the other embodiment do not have these details.In other situations, omit the detailed description to well-known device, circuit and method, in order to avoid unnecessary details hinders the description of the present application.
Refer to Fig. 1,2, in present embodiment, this method for synchronizing time includes radio network gateway 2 and at least one wireless senser 1.Described wireless senser 1 is set up with described radio network gateway 2 has wireless channel to be connected.
Specifically, a kind of this wireless senser 1 method for synchronizing time can be carried out in the case of being communicated wirelessly with described wireless senser 1 in described radio network gateway 2, described radio network gateway 2 is transmitted instruction and receiving data in cycle time calibration to described wireless senser 1, and described cycle time calibration includes WOR wake-up period and working cycle.
In described calibration cycle, refer to that radio network gateway 2 enters the calibration cycle to described wireless senser 1 for the described radio network gateway 2 after setting intervals, for example, this time interval may be set to 24 hours or 12 hours, i.e. every 24 hours or 12 hours, radio network gateway 2 carried out a time synchronization process to the wireless senser 1 in this system.
Wherein, it is provided with very first time window in described WOR wake-up period, in described WOR wake-up period：Described radio network gateway 2, when needed between when calibrating as when daily 08 15 points on described wireless channel broadcast packet contain multiple wake-up packet of unique encodings, as shown in figure 3, within the time period of T0-T1, radio network gateway sends multiple wake-up packet；The purpose of this wake-up packet is for waking up to described wireless senser 1, described wireless senser, all keep resting state in addition to described very first time window, and in described very first time window, carrier sense is carried out to described wireless channel, if it find that carrier wave then starts to receive described wake-up packet, and enter the described working cycle after terminating current WOR wake-up period, as shown in Figure 4, within the time period of T0-T1, listen to wake-up packet in t1 time point.
Wherein, described wireless senser 1, when described very first time window is monitored less than described wake-up packet, goes successively to next described WOR wake-up period after terminating current WOR wake-up period.I.e. daily 08：In 15 time synchronized wake-up periods, if wireless senser does not receive wake-up packet, abandon this synchronizing process, wait next synchronized wake-up bag.
Wherein, the working cycle of described wireless senser 1 includes first time period, second time period, before described first time period is located at described second time period, is provided with the second time window in described second time period.In the embodiment as shown in fig .4, T1-T2 represents first time period, and T2-T3 represents first time period, within the described working cycle：Described wireless senser 1，Confirm to waking up package informatin in described first time period，Calculate to waking up package informatin in the second time window of second time period，Mathematic interpolation is carried out with receiving time value according to the presynchronization duration comprising in wake-up packet，Determine that radio network gateway sends the calibration bag time，Position in described second time period for wherein said second time window is determined by described identification code，And when described wireless senser keeps resting state，Described wireless senser is less than 5 μ A from the average current of described battery consumption，As shown in Figure 4，T2 is the second time window，During t2，Calculate to waking up package informatin，Mathematic interpolation is carried out with receiving time value according to the presynchronization duration comprising in wake-up packet，Determine that radio network gateway sends the calibration bag time，Described radio network gateway，Communicated with one or more wireless sensers on described wireless channel，Realize the time synchronized of one or more wireless sensers and radio network gateway.
Wherein, it is additionally provided with the 3rd time window in described second time period, after described 3rd time window is located at described second time window, wherein：Described wireless senser, after sending the acknowledgment packet to described radio network gateway, in described 3rd time window, described wireless channel is monitored, to receive the calibration bag that described radio network gateway is broadcasted in described wireless channel, wherein said calibration includes unified timestamp.
Wherein, described wireless senser, after receiving described calibration bag, confirms to the timestamp in described calibration bag, and automatically calibrates itself wireless senser time to be allowed to be consistent with the radio network gateway time.As described in Figure 4, t3 is the 3rd time window, after t3 is located at t2, in t3 to channel-monitoring, receives the time calibration bag that radio network gateway sends, its temporal is calibrated.
Wherein, if wireless senser does not receive calibration bag or automatically calibrates unsuccessfully after receiving calibration bag, next radio network gateway cycle time calibration is waited to be calibrated.
Illustrated by the example of corresponding two wireless sensers of a radio network gateway, the corresponding identification code of wireless senser 1 is 10015025, and the corresponding identification code of wireless senser 2 is 10015060, and radio network gateway exists, 08：When 15, is carried out to the wireless senser in this network time calibration, in WOR wake-up period, broadcast packet contains multiple wake-up packet of unique encodings over the wireless channel, assume that the unique encodings in this wake-up determine 500 milliseconds of the time span of this wake-up packet transmission, then identification code is that the wireless senser 2 that 10015025 wireless senser 1 is 10015060 with identification code carries out channel-monitoring in WOR wake-up period very first time window, finds that carrier wave then starts to receive the wake-up packet of bag unique encodings.The working cycle is entered after finishing receiving, first time period in the working cycle, the wake-up packet of this unique encodings is confirmed, calculate to waking up package informatin in the second time window of second time period, mathematic interpolation is carried out with receiving time value according to the presynchronization duration comprising in wake-up packet, determine that radio network gateway sends the calibration bag time, the identification code of such as wireless senser 1 is 10015025, then it accepts the 25th millisecond that the time of wake-up packet is that this radio network gateway starts to send wake-up packet, time span is sent according to wake-up packet and is 500 milliseconds, then calculate also 575 milliseconds carry out time synchronized；The identification code of wireless senser 2 is 10015060, then it accepts the time of wake-up packet is that this radio network gateway starts to send the 60th millisecond of wake-up packet, sends time span according to wake-up packet and is 500 milliseconds, then calculate also 540 milliseconds carry out time synchronized.Because the 3rd time window is after the second time window, two wireless sensers pass through calculating and carry out time synchronized afterwards at the 575th millisecond and the 540th millisecond respectively, therefore in two wireless sensers of the 3rd time window, wireless channel is monitored, to receive the calibration bag that radio network gateway is broadcasted in described wireless channel, this calibration bag comprises unified timestamp.When radio network gateway is after sending the 500th millisecond after the wake-up packet calibration bag containing timestamp for the transmission, identification code be 10015025 wireless senser 1 be 10015060 with identification code wireless senser 2 monitor in the 3rd time window respectively, after receiving described calibration bag, timestamp in described calibration bag is confirmed, and automatically calibrates itself wireless senser time to be allowed to be consistent with the radio network gateway time.
When this time calibration process is as occurred the wireless senser that identification code is 10015025 to monitor less than wake-up packet in the very first time window of wake-up period, after terminating current WOR wake-up period, go successively to next described WOR wake-up period.I.e. wireless senser 1 abandons this synchronizing process, waits next synchronized wake-up bag.
In the case of another kind, such as occur the wireless senser that identification code is 10015025 not receive calibration bag or automatically calibrate unsuccessfully after receiving calibration bag, then wait next radio network gateway cycle time calibration to be calibrated.
In such scheme, beneficial effects of the present invention are as follows：
1. the present invention is carried out unified time calibration between wireless senser by radio network gateway, the time difference of each wireless senser and standard time need not be calculated, only need to wireless senser and carry out time self calibration by calibrating the timestamp in wrapping, under conditions of ensureing certain time precision, reduce system power consumption；
2. wireless senser is only monitored in the very first time window of WOR wake-up period, just because required electric current under resting state is less than 5 μ A, therefore can reduce the power consumption of wireless senser in a dormant state in the other times of WOR wake-up period；
3. wireless senser determines the second time window using itself identification code, to reduce the probability that different radio sensor sends data to radio network gateway simultaneously, and then reduce the data collision even avoiding between wireless senser, improve the reliability that multiple wireless sensers are communicated with radio network gateway.
Claims (4)
1. a kind of method of wireless senser time synchronized, it is characterized in that, including radio network gateway and at least one wireless senser, described wireless senser is set up with described radio network gateway has wireless channel to be connected, described radio network gateway is transmitted instruction and receiving data in cycle time calibration to described wireless senser, and described cycle time calibration includes WOR wake-up period and working cycle；
It is provided with very first time window, in described WOR wake-up period in described WOR wake-up period：Described radio network gateway, when needed between calibrate when on described wireless channel broadcast packet contain unique encodings multiple wake-up packet；Described wireless senser, all keep resting state in addition to described very first time window, and in described very first time window, carrier sense is carried out to described wireless channel, if it find that carrier wave then starts to receive described wake-up packet, and enter the described working cycle after terminating current WOR wake-up period；
The working cycle of described wireless senser includes first time period, second time period, before described first time period is located at described second time period, is provided with the second time window in described second time period；
Within the described working cycle：Described wireless senser, confirm to waking up package informatin in described first time period, calculate to waking up package informatin in described second time window, mathematic interpolation is carried out with receiving time value according to the presynchronization duration comprising in wake-up packet, determine that radio network gateway sends the calibration bag time, position in described second time period for wherein said second time window is determined by described identification code, and when described wireless senser keeps resting state, described wireless senser is less than 5 μ A from the average current of described battery consumption；
It is additionally provided with the 3rd time window, after described 3rd time window is located at described second time window, wherein in described second time period：Described wireless senser, monitors to described wireless channel in described 3rd time window, and to receive the calibration bag that described radio network gateway is broadcasted in described wireless channel, wherein said calibration includes unified timestamp；
Described wireless senser, after receiving described calibration bag, confirms to the timestamp in described calibration bag, and automatically calibrates itself wireless senser time to be allowed to be consistent with the radio network gateway time.
2. the method for a kind of wireless senser time synchronized according to claim 1, it is characterized in that, described wireless senser, when described very first time window is monitored less than described wake-up packet, goes successively to next described WOR wake-up period after terminating current WOR wake-up period.
If 3. a kind of method of wireless senser time synchronized according to claim 1, it is characterised in that wireless senser does not receive calibration bag or automatically calibrates unsuccessfully after receiving calibration bag, waits next radio network gateway cycle time calibration to be calibrated.
4. the method for a kind of wireless senser time synchronized according to claim 1, it is characterized in that, described radio network gateway, is communicated with one or more wireless sensers on described wireless channel, realizes the time synchronized of one or more wireless sensers and radio network gateway.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107249210A (en) * | 2017-06-26 | 2017-10-13 | 欧普照明股份有限公司 | Wireless device communication means and system |
| 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 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107249210A (en) * | 2017-06-26 | 2017-10-13 | 欧普照明股份有限公司 | Wireless device communication means and system |
| CN107249210B (en) * | 2017-06-26 | 2023-06-09 | 欧普照明股份有限公司 | Wireless device communication method and system |
| 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 |
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