CN105848185A - Wireless network node radio frequency deviation online adaptive correction device - Google Patents
Wireless network node radio frequency deviation online adaptive correction device Download PDFInfo
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- CN105848185A CN105848185A CN201610266704.2A CN201610266704A CN105848185A CN 105848185 A CN105848185 A CN 105848185A CN 201610266704 A CN201610266704 A CN 201610266704A CN 105848185 A CN105848185 A CN 105848185A
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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
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- 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
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- 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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- Electromagnetism (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The present invention provides a wireless network node radio frequency deviation online adaptive correction device. The device comprises a first arrangement module, a second arrangement module, a first sending module, a first receiving module, a reference node selection module, a starting module, a third arrangement module, a second sending module, a second receiving module, a fourth arrangement module and a fifth arrangement module. The wireless network node RF frequency deviation online adaptive correction device is able to perform dynamic regulation of the RF frequency deviation of a wireless network node in an on-site application environment so as to improve the communication adaptability of the wireless network node, reduce the precision requirement of a wireless transceiver on elements and decrease the production cost of the wireless transceiver.
Description
Technical field
The present invention relates to wireless communication networking technical field, specifically a kind of wireless network node rf frequency deviation online adaptive correcting device.
Background technology
At present, when producing wireless transmit, receiving equipment, the absolute precision of components and parts used is generally inadequate for the isoparametric performance objective of device frequency so that communication frequency and expected frequency have certain error.Conventional solution be exactly use costly, precision is higher, the more preferable components and parts of concordance.But, in the realistic case, each wireless device production firm is intended to provide the user with cheap and good-quality product, therefore under the pressure of cost, generally will not select costliness, precision is higher, the more preferable components and parts of concordance design, but gone to contrary direction, the ring that the calibration of such rf frequency or correction are indispensable during just becoming production or using.But the working level calibrated due to each manufacturer may be inconsistent, or during by work on the spot environmental effect, during real work often there is deviation in the rf frequency of multiple wireless network nodes, so the correction carrying out rf frequency at the scene is to ensure that a very effective pass of communication effect.
Summary of the invention
It is an object of the invention to provide a kind of wireless network node rf frequency deviation online adaptive correcting device, can network construction or during coming into operation frequency departure to wireless network node quickly revise, improve network communications quality.
The technical scheme is that
A kind of wireless network node rf frequency deviation online adaptive correcting device, this device include first arrange module, second module is set, the first sending module, the first receiver module, reference mode choose module, start module, the 3rd arrange module, the second sending module, the second receiver module, the 4th arrange module and the 5th and arrange module；
Described first arranges module, for when rf frequency has been revised, mode of operation is set to normal mode of operation, and rf frequency value is set to the correction value recorded in memorizer；
Described second arranges module, for when rf frequency is not revised, is set to mode of operation revise mode of operation, and rf frequency value is set to default operating frequency value；
Described first sending module, for arranging, according to second, the rf frequency value transmission broadcast correction request data package that module is arranged；
Described first receiver module, revises, for receiving broadcast, the reply data bag that request data package is corresponding, records the RSSI value that each reply data bag is corresponding simultaneously；
Described reference mode chooses module, for when the first receiver module receives reply data bag after time delay t1, compares the RSSI value of the first receiver module record, using wireless network node corresponding for maximum RSSI value as reference mode；
Described startup module, is used for when the first receiver module does not receives reply data bag after time delay t1, then sends enabling signal to the first sending module after time delay t2；It is additionally operable to, when the second receiver module does not receives the reply data bag that reference mode sends, after time delay t4, send enabling signal to the first sending module；
Described 3rd arranges module, for after reference mode determines, rf frequency value is set to default operating frequency value and deducts k*step, and wherein, k represents the integer more than 0, and step represents step frequency value；
Described second sending module, sends subsequent correction request data package for arranging the rf frequency value of module setting according to the 3rd to reference mode；It is additionally operable to send subsequent correction request data package according to the 4th rf frequency value arranging module setting to reference mode；
Described second receiver module, for receiving the reply data bag that reference mode sends, if receiving the reply data bag that reference mode sends, then records the RSSI value that this reply data bag is corresponding；
Described 4th arranges module, for when the second receiver module receive reference mode send reply data bag or do not receive within the t3 time reference mode send reply data bag time, by rf frequency value plus step, rf frequency value is made to carry out stepping increase, until rf frequency value adds k*step equal to default operating frequency value；
Described 5th arranges module, for when the second receiver module receives the reply data bag that reference mode sends, select rf frequency value corresponding to maximum RSSI value as revised rf frequency value, and recorded memorizer, afterwards mode of operation is switched to normal mode of operation.
Described wireless network node rf frequency deviation online adaptive correcting device, this device also includes that judge module and the 6th arranges module；
Described judge module, for judging under normal mode of operation, whether the packet loss of the newsletter data of record exceedes certain threshold value；
Described 6th arranges module, for when the result of judge module is for being, is revised as mode of operation revising mode of operation.
Described wireless network node rf frequency deviation online adaptive correcting device, t1=t3=100ms, t2=t4=500ms.
Described wireless network node rf frequency deviation online adaptive correcting device, k=5,
step=5000Hz。
The invention have the benefit that
As shown from the above technical solution, under present invention applied environment at the scene, the rf frequency deviation to wireless network node dynamically adjusts, improve the communication adaptability of wireless network node, also reduce the wireless transmitting-receiving equipments required precision to components and parts simultaneously, decrease the production cost of wireless transmitting-receiving equipments.
Accompanying drawing explanation
Fig. 1 is the structural representation of wireless network node in the present invention；
Fig. 2 is the structural representation of the present invention.
Detailed description of the invention
The present invention is further illustrated below in conjunction with the accompanying drawings with specific embodiment.
As it is shown in figure 1, wireless network node is mainly made up of CPU module 1, radio-frequency (RF) receiving and transmission module 2, memorizer 3, record purge button 4, mode of operation switching push button 5, mode of operation display display lamp 6 and battery 7.CPU module 1 uses STM32 single-chip microcomputer, radio-frequency (RF) receiving and transmission module 2 to use CC2500 single-chip microcomputer, connected by spi bus therebetween.
The operating frequency of radio-frequency (RF) receiving and transmission module 2 can be configured by CPU module 1, and radio-frequency (RF) receiving and transmission module 2 is for sending and receiving radio data.Memorizer 3 is for writing task parameter.Record purge button 4 is for removing the record value within memorizer 3.Mode of operation switching push button 5 is for carrying out manual switching to the mode of operation of wireless network node.Mode of operation display display lamp 6 is used 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 processes the packet that the address in broadcast data packet is corresponding with self, directly abandons for the packet of other address and does not process.
The working frequency range of radio-frequency (RF) receiving and transmission module 2 is 2400～2483.5MHz, and several working channels at most can be divided into work simultaneously, and in order to reduce co-channel interference, channel spacing frequency requirement is at more than 1MHz.
The mode of operation of wireless network node is divided into three kinds: normal mode of operation, reference work pattern and correction mode of operation, mode of operation dynamically can be revised by the internal processes of CPU module 1.
Memorizer 3 records the state value having rf frequency to be the most corrected, revised rf frequency value.When wireless network node is started shooting, CPU module 1 first reads the relative recording value in memorizer 3, judge that rf frequency is corrected the most, if be corrected, then mode of operation is set to normal mode of operation, and rf frequency is set to recorded correction value, without when revising or memorizer 3 is recorded as empty, then it is set to mode of operation revise mode of operation.When needed, the record value in memorizer 3 manually can be removed by record purge button 4, becomes empty.
When the mode of operation of wireless network node is normal mode of operation and correction mode of operation, reference work pattern can be switched to by mode of operation switching push button 5.After being switched to reference work pattern, rf frequency is set to default operating frequency by this wireless network node, and revise the correction state of inside for revise, using default operating frequency as revised frequency record to memorizer 3 in, this wireless network node is using the reference mode as other wireless network node afterwards.The default operating frequency value of all wireless network nodes is identical.
Wireless network node Frame in communication process is divided into business data frame and revises Frame.When wireless network node is in reference work pattern or normal mode of operation, when it receives correction Frame, carry out former state response passback without modification to revising data frame content, it is provided that revise passback service.When wireless network node is in correction mode of operation, when it receives correction Frame, correction Frame is abandoned and does not process.When the wireless network node being in three kinds of mode of operations receives business data frame, all need to carry out normal response process according to Business Processing.
Select a wireless network node to make it be operated in reference work pattern by mode of operation switching push button, and this wireless network node is positioned near other wireless network node needing correction rf frequency.Because this wireless network node is in reference work pattern, it can carry out response for the correction Frame received, it is provided that revises passback service, using as standard radio frequency frequency reference node.Other wireless network node is after powering, when detecting that rf frequency is not revised, automatically switch to revise mode of operation (calling correction node in the following text), attempt providing the wireless network node communication revising passback service with its periphery, be modified with the rf frequency to self.
As shown in Figure 2, a kind of wireless network node rf frequency deviation online adaptive correcting device, including first arrange module 11, second module the 12, first sending module the 13, first receiver module 14 is set, reference mode chooses module 15, start module the 16, the 3rd arranges module the 17, second sending module the 18, second receiver module the 19, the 4th and arrange module 110 and the 5th and arrange module 111.
When rf frequency has been revised, first arranges module 11 is set to normal mode of operation by mode of operation, and rf frequency value is set to the correction value recorded in memorizer 3.When rf frequency is not revised, second arranges module 12 is set to mode of operation revise mode of operation, and rf frequency value is set to default operating frequency value.First sending module 13 sends broadcast according to the second rf frequency value arranging module 12 setting to peripheral wireless network node and revises request data package.When the neighbouring wireless network node being in reference work pattern or normal mode of operation receives the broadcast correction request data package that the first sending module 13 sends, random back time delay is not more than the time of 100ms, prevent multiple wireless network node from replying simultaneously and causing conflict, the most then send reply data bag to the first receiver module 14.
In the time subsequently, the first receiver module 14 receives the reply data bag that other wireless network node is sent, and records the RSSI value that each reply data bag is corresponding simultaneously.After 100ms, now the first receiver module 14 is likely to be received the reply data bag that multiple wireless network node is sent, it is also possible to be not received by any reply data bag.After the first receiver module 14 receives one and above reply data bag, reference mode is chosen module 15 and is selected the wireless network node of wherein RSSI value maximum as reference mode.When the first receiver module 14 is not received by reply data bag, after starting module 16 time delay 500ms, send enabling signal to the first sending module 13 and repeat broadcast correction request.
After reference mode determines, the 3rd arranges module 17 is revised as Value(Value=default operating frequency-5*step by rf frequency), wherein the value of step is generally 5000Hz.Second sending module 18 sends subsequent correction request data package (not being that request data package is revised in broadcast) according to the 3rd rf frequency value arranging module 17 setting to reference mode.Second receiver module 19 receives the reply data bag that reference mode sends, if receiving the reply data bag that reference mode sends, then records the RSSI value that this reply data bag is corresponding.
When the second receiver module 19 receive reference mode send reply data bag or do not receive in 100ms reference mode send reply data bag time, 4th arranges module 110 is set to current radio frequency frequency values+step(i.e. Value=current radio frequency frequency values+step by rf frequency), carry out stepping increase, until rf frequency value=default operating frequency+5*step value.During stepping increases, the second sending module 18 sends subsequent correction request data package according to the 4th rf frequency value arranging module 110 setting to reference mode.
When the second receiver module 19 receives the number of times of the reply data bag that reference mode sends more than or equal to 1,5th RSSI value arranging each reply data bag that reference mode sends by module 111 corresponding compares, select the rf frequency value corresponding to greatest rssi value as revised rf frequency value, and recorded memorizer 3, it is switched to normal mode of operation afterwards, correction work completes, this wireless network node will automatically provide correction passback service later, provide standard radio frequency frequency reference for other wireless network node do not revised.When the second receiver module 19 does not receives any reply data bag that reference mode sends, send enabling signal to the first sending module 13 after starting module 16 time delay 500ms and proceed to revise.
From the above, the present invention is during the online communication of multiple wireless network nodes, first select a wireless network node as reference mode, adjusting the working channel revising node with reference mode is same channel, make can carry out therebetween basic communication, then the rf frequency of fixed reference node, the rf frequency of automatic fine tuning correction node again, even if its rf frequency increases or reduces, then communication signal intensity level therebetween is tested, when recording communication signal intensity level and reaching maximum, fix and record the rf frequency value now revising node, as revised rf frequency value, the most therebetween communication effect is optimal.In the multinode single level or multi-layer network of reality application, use said method AUTOMATIC ZONING to revise step by step, the rf frequency of all nodes in whole network can be made quickly to carry out adaptive correction in the presence without extra instrument.
As long as after network having a wireless network node correction complete, other wireless network node can be provided and revise passback service so that the wireless network node in whole network is revised automatically.For the wireless network node that position is fixing, the wireless network node revised can be placed in its vicinity and carry out auxiliary correction.It is in the wireless network node of normal mode of operation, in the communication process of business datum, the packet loss of record traffic data, when packet loss exceedes certain threshold value, is automatically revised as mode of operation revising mode of operation and again revises.
When wireless network node only allows to carry out being layered communication, the wireless network node of the most each level may only with its adjacent higher level's wireless network node or adjacent subordinate's wireless network node communication time, the most first the wireless network node to top carries out manual correction, and then the wireless network node of other level can be revised automatically.When the rf frequency of wireless network node is not revised, do not affect its regular traffic communication work.In order to grasp the overall rf frequency correction situation of wireless network node, business data frame can carry out inquiry operation to the correction situation of wireless network node, for the concordance situation of statistical product quality.
The above embodiment is only to be described the preferred embodiment of the present invention; not the scope of the present invention is defined; on the premise of designing spirit without departing from the present invention; various deformation that technical scheme is made by those of ordinary skill in the art and improvement, all should fall in the protection domain that claims of the present invention determines.
Claims (4)
1. a wireless network node rf frequency deviation online adaptive correcting device, it is characterised in that: this device include first arrange module, second module is set, the first sending module, the first receiver module, reference mode choose module, start module, the 3rd arrange module, the second sending module, the second receiver module, the 4th arrange module and the 5th and arrange module；
Described first arranges module, for when rf frequency has been revised, mode of operation is set to normal mode of operation, and rf frequency value is set to the correction value recorded in memorizer；
Described second arranges module, for when rf frequency is not revised, is set to mode of operation revise mode of operation, and rf frequency value is set to default operating frequency value；
Described first sending module, for arranging, according to second, the rf frequency value transmission broadcast correction request data package that module is arranged；
Described first receiver module, revises, for receiving broadcast, the reply data bag that request data package is corresponding, records the RSSI value that each reply data bag is corresponding simultaneously；
Described reference mode chooses module, for when the first receiver module receives reply data bag after time delay t1, compares the RSSI value of the first receiver module record, using wireless network node corresponding for maximum RSSI value as reference mode；
Described startup module, is used for when the first receiver module does not receives reply data bag after time delay t1, then sends enabling signal to the first sending module after time delay t2；It is additionally operable to, when the second receiver module does not receives the reply data bag that reference mode sends, after time delay t4, send enabling signal to the first sending module；
Described 3rd arranges module, for after reference mode determines, rf frequency value is set to default operating frequency value and deducts k*step, and wherein, k represents the integer more than 0, and step represents step frequency value；
Described second sending module, sends subsequent correction request data package for arranging the rf frequency value of module setting according to the 3rd to reference mode；It is additionally operable to send subsequent correction request data package according to the 4th rf frequency value arranging module setting to reference mode；
Described second receiver module, for receiving the reply data bag that reference mode sends, if receiving the reply data bag that reference mode sends, then records the RSSI value that this reply data bag is corresponding；
Described 4th arranges module, for when the second receiver module receive reference mode send reply data bag or do not receive within the t3 time reference mode send reply data bag time, by rf frequency value plus step, rf frequency value is made to carry out stepping increase, until rf frequency value adds k*step equal to default operating frequency value；
Described 5th arranges module, for when the second receiver module receives the reply data bag that reference mode sends, select rf frequency value corresponding to maximum RSSI value as revised rf frequency value, and recorded memorizer, afterwards mode of operation is switched to normal mode of operation.
Wireless network node rf frequency deviation online adaptive correcting device the most according to claim 1, it is characterised in that: this device also includes that judge module and the 6th arranges module；
Described judge module, for judging under normal mode of operation, whether the packet loss of the newsletter data of record exceedes certain threshold value；
Described 6th arranges module, for when the result of judge module is for being, is revised as mode of operation revising mode of operation.
Wireless network node rf frequency deviation online adaptive correcting device the most according to claim 1, it is characterised in that: t1=t3=100ms, t2=t4=500ms.
Wireless network node rf frequency deviation online adaptive correcting device the most according to claim 1, it is characterised in that: k=5, step=5000Hz.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
| CN108629857A (en) * | 2017-03-24 | 2018-10-09 | 杭州海康威视数字技术股份有限公司 | A kind of method and system of control restrictor bar |
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| CN108629857A (en) * | 2017-03-24 | 2018-10-09 | 杭州海康威视数字技术股份有限公司 | A kind of method and system of control restrictor bar |
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