CN105848185B - A kind of wireless network node rf frequency deviation online adaptive correcting device - Google Patents
A kind of wireless network node rf frequency deviation online adaptive correcting device Download PDFInfo
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- CN105848185B CN105848185B CN201610266704.2A CN201610266704A CN105848185B CN 105848185 B CN105848185 B CN 105848185B CN 201610266704 A CN201610266704 A CN 201610266704A CN 105848185 B CN105848185 B CN 105848185B
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- 230000005540 biological transmission Effects 0.000 claims description 21
- 238000012937 correction Methods 0.000 claims description 11
- 230000003111 delayed effect Effects 0.000 claims description 8
- 230000006854 communication Effects 0.000 abstract description 14
- 238000004891 communication Methods 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000004044 response Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 238000010926 purge Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 238000012360 testing method Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/11—Monitoring; Testing of transmitters for calibration
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/21—Monitoring; Testing of receivers for calibration; for correcting measurements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The present invention provides a kind of wireless network node rf frequency deviation online adaptive correcting device, including the first setup module, the second setup module, the first sending module, the first receiving module, reference mode choose module, starting module, third setup module, the second sending module, the second receiving module, the 4th setup module and the 5th setup module.The present invention carries out dynamic adjustment to the rf frequency deviation of wireless network node under application environment at the scene, improve the communication adaptability of wireless network node, required precision of the wireless transmitting-receiving equipments to component is also reduced simultaneously, reduces the production cost of wireless transmitting-receiving equipments.
Description
Technical field
The present invention relates to wireless communication networking technical field, specifically a kind of wireless network node rf frequency deviation is online
Adaptive correction device.
Background technique
Currently, the absolute precision of component used is generally inadequate for equipment when producing wireless transmission, receiving device
The performance objective of the parameters such as frequency, so that communication frequency and expected frequency have certain error.Common solution is exactly to make
With costly, precision is higher, the better component of consistency.But in the realistic case, each wireless device production
Manufacturer is intended to provide the user with cheap and good-quality product, therefore under the pressure of cost, will not usually select valuableness, precision
Higher, the better component of consistency designs, but has gone to opposite direction, the calibration or amendment of such rf frequency
Just become a ring indispensable in production or use process.But since the working level of each manufacturer calibration may be different
When causing, or being influenced by work on the spot environment, in actual work often there is deviation in the rf frequency of multiple wireless network nodes,
So the amendment for carrying out rf frequency at the scene is to guarantee that very effective the one of communication effect closes.
Summary of the invention
The purpose of the present invention is to provide a kind of wireless network node rf frequency deviation online adaptive correcting devices, can
Quickly to be corrected in network construction or come into operation during to the frequency departure of wireless network node, network communication matter is improved
Amount.
The technical solution of the present invention is as follows:
A kind of wireless network node rf frequency deviation online adaptive correcting device, the device include the first setting mould
Block, the second setup module, the first sending module, the first receiving module, reference mode choose module, starting module, third setting
Module, the second sending module, the second receiving module, the 4th setup module and the 5th setup module；
First setup module works normally mould for setting operating mode to when rf frequency has been corrected
Formula, and correction value recorded in memory is set by rf frequency value；
Second setup module, for setting amendment operating mode for operating mode when rf frequency is not corrected,
And default operating frequency value is set by rf frequency value；
First sending module, the rf frequency value for being arranged according to the second setup module send broadcast amendment request
Data packet；
First receiving module records simultaneously for receiving the corresponding reply data packet of broadcast amendment request data package
The corresponding RSSI value of each reply data packet；
The reference mode chooses module, for when the first receiving module is when receiving reply data packet after being delayed t1,
The RSSI value of first receiving module record is compared, using the corresponding wireless network node of maximum RSSI value as reference node
Point；
The starting module for when the first receiving module is not when receiving reply data packet after being delayed t1, then is delayed
Enabling signal is sent to the first sending module after t2；It is also used to not receive the response of reference mode transmission when the second receiving module
When data packet, enabling signal is sent to the first sending module after the t4 that is delayed；
The third setup module, for setting default working frequency for rf frequency value after reference mode determines
Value subtracts k*step, wherein k indicates to be greater than 0 integer, step expression step frequency value；
Second sending module, after the rf frequency value for being arranged according to third setup module is sent to reference mode
Continuous amendment request data package；The rf frequency value for being also used to be arranged according to the 4th setup module sends subsequent correction to reference mode
Request data package；
Second receiving module, for receiving the reply data packet of reference mode transmission, if receiving reference mode hair
The reply data packet sent then records the corresponding RSSI value of reply data packet；
4th setup module, for when the second receiving module receive reference mode transmission reply data packet or
When not receiving the reply data packet of reference mode transmission in the t3 time, rf frequency value is added into step, makes rf frequency value
Stepping increase is carried out, until rf frequency value, which is equal to default operating frequency value, adds k*step；
5th setup module, when for receiving the reply data packet of reference mode transmission when the second receiving module,
It selects the corresponding rf frequency value of maximum RSSI value as revised rf frequency value, and memory is recorded, later will
Operating mode is switched to normal mode of operation.
The wireless network node rf frequency deviation online adaptive correcting device, which further includes judgment module
With the 6th setup module；
The judgment module, the packet loss of the newsletter data for judging to record under normal mode of operation whether be more than
Certain threshold value；
6th setup module, for when the result of judgment module, which is, is, operating mode to be revised as amendment work
Mode.
The wireless network node rf frequency deviation online adaptive correcting device, t1=t3=100ms, t2=t4=
500ms。
The wireless network node rf frequency deviation online adaptive correcting device, k=5, step=5000Hz.
The invention has the benefit that
As shown from the above technical solution, the present invention is at the scene under application environment to the rf frequency deviation of wireless network node
Dynamic adjustment is carried out, improves the communication adaptability of wireless network node, while also reducing wireless transmitting-receiving equipments to component
Required precision, reduce the production cost of wireless transmitting-receiving equipments.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of wireless network node in the present invention；
Fig. 2 is structural schematic diagram of the invention.
Specific embodiment
The present invention is further illustrated in the following with reference to the drawings and specific embodiments.
As shown in Figure 1, wireless network node is mainly pressed by CPU module 1, RF receiving and transmission module 2, memory 3, record purge
Button 4, operating mode switching push button 5, operating mode show that indicator light 6 and battery 7 form.CPU module 1 uses STM32 single-chip microcontroller,
RF receiving and transmission module 2 uses CC2500 single-chip microcontroller, is connected by spi bus therebetween.
CPU module 1 can be configured the working frequency of RF receiving and transmission module 2, RF receiving and transmission module 2 for send and
Receive wireless data.Memory 3 is for recording running parameter.Record purge button 4 is used to remove the record inside memory 3
Value.Operating mode switching push button 5 is used to carry out manual switching to the operating mode of wireless network node.Operating mode display instruction
Lamp 6 is for showing current operation mode.Battery 7 is for being powered wireless network node.
Each wireless network node has a unique address, and wireless network node only handles the ground in broadcast data packet
Location data packet corresponding with itself, directly abandons the data packet of other addresses and does not handle.
The working frequency range of RF receiving and transmission module 2 is 2400~2483.5MHz, and it is same can be at most divided into several working channels
When work, in order to reduce co-channel interference, channel spacing frequency requirement is in 1MHz or more.
The operating mode of wireless network node is divided into three kinds: normal mode of operation, reference work mode and amendment Working mould
Formula, operating mode can be modified by the internal processes dynamic of CPU module 1.
Whether record has rf frequency modified state value, revised rf frequency value in memory 3.Wireless
When network node is switched on, CPU module 1 first reads the relative recording value in memory 3, judges whether rf frequency has been corrected,
If be corrected, normal mode of operation is set by operating mode, and set recorded correction value for rf frequency,
If do not correct or memory 3 in when being recorded as empty, set amendment operating mode for operating mode.It is needing
When wanting, the record value in memory 3 can be removed manually by record purge button 4, become empty.
When the operating mode of wireless network node is normal mode of operation and amendment operating mode, cut by operating mode
Reference work mode can be switched to by changing button 5.After being switched to reference work mode, the wireless network node is by rf frequency
It is set as default working frequency, and modifying internal amendment state is to have been corrected, using default working frequency as revised frequency
Rate is recorded in memory 3, and the wireless network node is by the reference mode as other wireless network nodes later.It is all wireless
The default operating frequency value of network node is identical.
Data frame of the wireless network node in communication process is divided into business data frame and amendment data frame.Work as wireless network
When network node is in reference work mode or normal mode of operation, when it receives amendment data frame, in amendment data frame
Hold and carry out original sample response passback without modification, amendment backhaul service is provided.When wireless network node is in amendment operating mode,
When it receives amendment data frame, amendment data frame discarding is not handled.When the wireless network section for being in three kinds of operating modes
When point receives business data frame, all need to carry out normal response processing according to business processing.
A wireless network node is selected to make its work in reference work mode by operating mode switching push button, and should
Wireless network node is placed near other wireless network nodes for needing to correct rf frequency.Because at the wireless network node
In reference work mode, response will do it for the amendment data frame received, amendment backhaul service is provided, using as standard
Rf frequency reference mode.Other wireless network nodes after powering, when detecting that rf frequency is not corrected, automatically switch to
Amendment operating mode (calls amendment node in the following text), and the wireless network node for attempting to provide amendment backhaul service with its periphery communicates, with
The rf frequency of itself is modified.
As shown in Fig. 2, a kind of wireless network node rf frequency deviation online adaptive correcting device, including the first setting
Module 11, the second setup module 12, the first sending module 13, the first receiving module 14, reference mode choose module 15, starting mould
Block 16, third setup module 17, the second sending module 18, the second receiving module 19, the 4th setup module 110 and the 5th setting mould
Block 111.
When rf frequency has been corrected, operating mode is set normal mode of operation by the first setup module 11, and will
Rf frequency value is set as correction value recorded in memory 3.When rf frequency is not corrected, the second setup module 12 is by work
Operation mode is set as amendment operating mode, and sets default operating frequency value for rf frequency value.First sending module 13
Broadcast amendment request data package is sent to peripheral wireless network node according to the rf frequency value of the second setup module 12 setting.When attached
Nearby in reference work mode or normal mode of operation wireless network node receive the first sending module 13 send it is wide
When broadcasting amendment request data package, random back delay is not more than the time of 100ms, prevents the response simultaneously of multiple wireless network nodes
And cause to conflict, then reply data packet then is sent to the first receiving module 14.
In the subsequent time, the first receiving module 14 receives the reply data packet that other wireless network nodes are sent, and
The corresponding RSSI value of each reply data packet is recorded simultaneously.After 100ms, the first receiving module 14 is likely to be received more at this time
The reply data packet that a wireless network node is sent, it is also possible to be not received by any reply data packet.When the first reception mould
After block 14 receives one and the above reply data packet, reference mode chooses the selection of the module 15 wherein maximum wireless network of RSSI value
Network node is as reference mode.When the first receiving module 14 is not received by reply data packet, the delay of starting module 16 500ms
Afterwards, enabling signal is sent to the first sending module 13 repeat broadcast amendment request.
After reference mode determines, rf frequency is revised as Value(Value=default work frequency by third setup module 17
Rate -5*step), wherein the value of step is generally 5000Hz.Second sending module 18 is penetrated according to what third setup module 17 was arranged
Frequency frequency values send subsequent correction request data package (not being broadcast amendment request data package) to reference mode.Second receiving module
19 receive the reply data packet that reference mode is sent, if receiving the reply data packet of reference mode transmission, record the response
The corresponding RSSI value of data packet.
When the second receiving module 19 receives the reply data packet of reference mode transmission or does not receive reference in 100ms
When the reply data packet that node is sent, the 4th setup module 110 sets current radio frequency frequency values+step(i.e. for rf frequency
Value=current radio frequency frequency values+step), stepping increase is carried out, until rf frequency value=default working frequency+5*step value
Until.During stepping increases, rf frequency value that the second sending module 18 is arranged according to the 4th setup module 110 is to reference
Node sends subsequent correction request data package.
When the number that the second receiving module 19 receives the reply data packet of reference mode transmission is more than or equal to 1, the 5th
The corresponding RSSI value of each reply data packet that reference mode is sent is compared by setup module 111, selects greatest rssi value
Memory 3 is recorded as revised rf frequency value in corresponding rf frequency value, is switched to normal work mould later
Formula, amendment work are completed, and the later wireless network node will automatically provide amendment backhaul service, are other nothings for not correcting completion
Line network node provides standard radio frequency frequency reference.When the second receiving module 19 does not receive any response of reference mode transmission
When data packet, enabling signal is sent to the first sending module 13 after the delay of starting module 16 500ms and continues to correct.
It can be seen from the above, the present invention during online communication of multiple wireless network nodes, first selectes a wireless network
Network node is as reference mode, and the working channel and reference mode of adjustment amendment node are same channel, so that energy between the two
It is enough communicated substantially, then the rf frequency of fixed reference node, then the rf frequency of automatic fine tuning amendment node, even if its
Rf frequency increases or reduces, and then tests communication signal intensity value between the two, reaches when measuring communication signal intensity value
When maximum, rf frequency value that is fixed and recording amendment node at this time, as revised rf frequency value, at this time therebetween
Communication effect it is best.In the multinode single level or multi-layer network of practical application, using above method AUTOMATIC ZONING by
It is adaptive to may make that the rf frequency of all nodes in whole network quickly carries out in the presence without additional instrument for grade amendment
It should correct.
As long as can be provided other wireless network nodes after the completion of having a wireless network node amendment in network
Backhaul service is corrected, so that the wireless network node in whole network is automatically corrected.For the wireless network that position is fixed
Node can place corrected wireless network node in its vicinity and carry out auxiliary amendment.In the wireless of normal mode of operation
Network node, in the communication process of business datum, the packet loss of record traffic data, when packet loss is more than certain threshold value
When, operating mode is revised as amendment operating mode automatically and is corrected again.
When wireless network node only allows to carry out layering communication, i.e., the wireless network node of each level may only be with phase
When its adjacent higher level's wireless network node or adjacent junior's wireless network node communicate, generally first to the wireless network of top
Node carries out manual correction, and then the wireless network node of other levels can be corrected automatically.When the radio frequency of wireless network node
When frequency is not corrected, its regular traffic communication work is not influenced.In order to grasp the overall rf frequency amendment of wireless network node
Situation, in business data frame can amendment situation to wireless network node carry out inquiry operation, be used for statistical product quality
Consistency situation.
Embodiment described above is only that preferred embodiments of the present invention will be described, not to model of the invention
It encloses and is defined, without departing from the spirit of the design of the present invention, those of ordinary skill in the art are to technical side of the invention
The various changes and improvements that case is made, should fall within the scope of protection determined by the claims of the present invention.
Claims (4)
1. a kind of wireless network node rf frequency deviation online adaptive correcting device, it is characterised in that: the device includes the
One setup module, the second setup module, the first sending module, the first receiving module, reference mode choose module, starting module,
Third setup module, the second sending module, the second receiving module, the 4th setup module and the 5th setup module；
First setup module, for setting normal mode of operation for operating mode when rf frequency has been corrected, and
Correction value recorded in memory is set by rf frequency value；
Second setup module, for setting amendment operating mode for operating mode, and will when rf frequency is not corrected
Rf frequency value is set as default operating frequency value；
First sending module, the rf frequency value for being arranged according to the second setup module send broadcast amendment request data
Packet；
First receiving module for receiving the corresponding reply data packet of broadcast amendment request data package, while recording each
The corresponding RSSI value of reply data packet；
The reference mode chooses module, for when the first receiving module is when receiving reply data packet after being delayed t1, to the
The RSSI value of one receiving module record is compared, using the corresponding wireless network node of maximum RSSI value as reference mode；
The starting module for when the first receiving module is not when receiving reply data packet after being delayed t1, then is delayed after t2
Enabling signal is sent to the first sending module；It is also used to not receive the reply data of reference mode transmission when the second receiving module
Enabling signal is sent to the first sending module after Bao Shi, the t4 that is delayed；
The third setup module, for setting default operating frequency value for rf frequency value and subtracting after reference mode determines
Remove k*step, wherein k indicates to be greater than 0 integer, step expression step frequency value；
Second sending module, the rf frequency value for being arranged according to third setup module send subsequent repair to reference mode
Positive request data package；The rf frequency value for being also used to be arranged according to the 4th setup module sends subsequent correction request to reference mode
Data packet；
Second receiving module, for receiving the reply data packet of reference mode transmission, if receiving reference mode transmission
Reply data packet then records the corresponding RSSI value of reply data packet；
4th setup module, for receiving the reply data packet of reference mode transmission when the second receiving module or in t3
When the interior reply data packet for not receiving reference mode transmission, rf frequency value is added into step, carries out rf frequency value
Stepping increases, until rf frequency value, which is equal to default operating frequency value, adds k*step；
5th setup module, rf frequency value for being arranged when the second sending module according to the 4th setup module is to reference
Node sends subsequent correction request data package, and when the second receiving module receives time of the reply data packet of reference mode transmission
When number is more than or equal to 1, the corresponding RSSI value of each reply data packet that reference mode is sent is compared, selects maximum RSSI
Memory is recorded as revised rf frequency value in the corresponding rf frequency value of value, later switches operating mode
To normal mode of operation.
2. wireless network node rf frequency deviation online adaptive correcting device according to claim 1, feature exist
In: the device further includes judgment module and the 6th setup module；
Whether the packet loss of the judgment module, the newsletter data for judging to record under normal mode of operation is more than certain
Threshold value；
6th setup module, for when the result of judgment module, which is, is, operating mode to be revised as amendment operating mode.
3. wireless network node rf frequency deviation online adaptive correcting device according to claim 1, feature exist
In: t1=t3=100ms, t2=t4=500ms.
4. wireless network node rf frequency deviation online adaptive correcting device according to claim 1, feature exist
In: k=5, step=5000Hz.
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| CN107787038A (en) * | 2016-08-26 | 2018-03-09 | 山东数智体育科技股份有限公司 | A kind of method of frequency correction |
| CN108629857B (en) * | 2017-03-24 | 2021-04-27 | 杭州海康威视数字技术股份有限公司 | Method and system for controlling brake lever |
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| US5506910A (en) * | 1994-01-13 | 1996-04-09 | Sabine Musical Manufacturing Company, Inc. | Automatic equalizer |
| CN101262393A (en) * | 2008-01-25 | 2008-09-10 | 华中科技大学 | Industrial wireless sensing network and communication method based on distributed coordinated frequency |
| CN102958177A (en) * | 2006-09-08 | 2013-03-06 | 高通股份有限公司 | A method and apparatus for fast other sector interference (osi) adjustment |
| CN104684013A (en) * | 2015-02-10 | 2015-06-03 | 深圳市盈广现代网络设备有限公司 | Anti-interference method and device of wireless communication |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8417259B2 (en) * | 2008-03-31 | 2013-04-09 | At&T Mobility Ii Llc | Localized detection of mobile devices |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5506910A (en) * | 1994-01-13 | 1996-04-09 | Sabine Musical Manufacturing Company, Inc. | Automatic equalizer |
| CN102958177A (en) * | 2006-09-08 | 2013-03-06 | 高通股份有限公司 | A method and apparatus for fast other sector interference (osi) adjustment |
| CN101262393A (en) * | 2008-01-25 | 2008-09-10 | 华中科技大学 | Industrial wireless sensing network and communication method based on distributed coordinated frequency |
| CN104684013A (en) * | 2015-02-10 | 2015-06-03 | 深圳市盈广现代网络设备有限公司 | Anti-interference method and device of wireless communication |
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