CN108024258A - A kind of Wireless Communication Equipment small-signal spreads network-building method - Google Patents
A kind of Wireless Communication Equipment small-signal spreads network-building method Download PDFInfo
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- CN108024258A CN108024258A CN201711260480.5A CN201711260480A CN108024258A CN 108024258 A CN108024258 A CN 108024258A CN 201711260480 A CN201711260480 A CN 201711260480A CN 108024258 A CN108024258 A CN 108024258A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/18—Network planning tools
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/101—Monitoring; Testing of transmitters for measurement of specific parameters of the transmitter or components thereof
- H04B17/102—Power radiated at antenna
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
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Abstract
The invention discloses a kind of Wireless Communication Equipment small-signal diffusion network-building method, the device node in this method calculates definite wireless signal transmission power when communicating wirelessly networking by the way of detecting certainly, and the overall step from detection is：Variable power signal detection, detection data exchange, detection data is grouped, detection data sorts, transmission power confirms, mesh information forwarding table confirms, networking is spread in circulation.The present invention is using the gateway device of wireless network as start node, networking is diffused using wireless small-signal transmission power, can launch Variable power detection frame it is descending, by as far as it is near and ascending, from the near to the remote communicate wirelessly distance measurement, all devices in wireless spatial domain are linked to using gateway device as in the wireless network of starting point, ensure Wireless Communication Equipment can reliably networking communication and information forwarding on the premise of, minimum radio transmitted power is chosen, ensures that equipment wireless signal coverage minimizes.
Description
Technical field
The present invention relates to a kind of method, more particularly to a kind of Wireless Communication Equipment small-signal diffusion network-building method, belong to thing
Networking technology field.
Background technology
Current Internet of Things field, employs various wireless network communication technologies and carries out the logical of things and things, thing and people
News and information exchange.In order to realize the communication between more Wireless Communication Equipment, the powerful wireless hair of people's generally use
Jet device carries out the wireless signal covering in a wide range of space, so as to ensure that each Wireless Communication Equipment can in a wide range of space
Communicated with radio management central apparatus.But from RF resources distribute angle, a wide range of space it is wireless
Covering, can cause the waste of a large amount of frequency spatial domains resource, cause in a wide range of space, and two wireless devices are carried out in certain frequency point
During wireless telecommunications, other wireless devices cannot all be communicated wirelessly in the frequency point, and need to select other frequency point to be led to
News, so as to cause low, the utilization ratio height of frequency resource of multipoint unit communication efficiency in a wide range of space.
Therefore, in actual use, powerful wireless transmitting device can be subject to State Radio Regulatory Commission
Control, avoid the high-power wireless transmitting equipment wireless telecommunications system important to other countries from causing radio interference so that shadow
Ring life and the production safety of people；The wound for the wireless signal Radiation On Human body that powerful wireless transmitting device is sent at the same time
Evil is also bigger, can threaten the health of people over time.Have producer at present to carry out by the way of manual configuration
The networking of Wireless Communication Equipment, then manually configures Wireless Communication Equipment transmission power to realize Wireless Communication Equipment networking
Small-signal covering, but in large number of Internet of Things field, the networking mode and transmission power of each Wireless Communication Equipment
It is required for configuring, its networking workload will be very big, once situations such as running into the mobile network equipment, failure, newly added equipment
When, and need once to configure each equipment, the adaptability of wireless network is very low.
The content of the invention
In order to solve the shortcoming present in above-mentioned technology, the present invention provides a kind of expansion of Wireless Communication Equipment small-signal
Dissipate network-building method.
In order to solve the above technical problems, the technical solution adopted by the present invention is：A kind of Wireless Communication Equipment small-signal expands
Network-building method is dissipated, its step is as follows：
Step S1, the Wireless Communication Equipment by all participation wireless networking communications is named as device node；It will need to carry out
The device node that radio transmitted power calculates is named as active devices；It would be possible to and the active devices carry out setting for wireless networking
Slave node is named as passive equipment；
Step S2, device node is made to communicate wirelessly networking by the way of detecting certainly；, will in wireless communication networking
The active devices that wireless power is calculated from detection are initiated at first is named as gateway active devices；Since the gateway active devices,
The calculating that transmitting power of equipment is carried out to miscellaneous equipment node direction spreads wireless networking from detection and small-signal；Gateway is actively set
It is standby to complete from after detecting, the equipment nearest apart from gateway active devices is carried out from detecting as active devices, so circulation is straight
To all devices for being diffused into whole wireless communication networks；
The overall step from detection is as follows：
Step S21, Variable power signal detection：Detected using descending and ascending transmission power transmit power
Frame, the power detection frame is received by passive equipment, records the signal strength RSSI value received and tracer signal intensity entry；
Step S22, detection data exchanges：The signal strength entry that passive equipment records is transmitted to master by wireless signal
Dynamic equipment is simultaneously stored；
Step S23, detection data is grouped：After active devices store the signal strength entry for exchanging acquisition, according to signal
Transmission power in intensity entry carries out signal strength entry packet, and identical transmission power is divided into one group；The step is used for
The signal strength entry of multiple passive equipments to getting is grouped according to identical transmission power, is completed in a hair
Penetrate under power condition, there are multiple passive equipments by wireless coverage；
Step S24, detection data sorts：Received signal strength of the data after packet in signal strength entry is put down
Average, receive signal minimum, carries out signal strength entry sequence from big to small；The distance that the step completes passive equipment is known
Not；
Step S25, transmission power confirms：According to the demand of Wireless Communication Equipment actual wireless networking, active devices are determined
Wireless signal at least need to cover how many a passive equipments and carry out the final transmission power for confirming Wireless Communication Equipment；The step is complete
Into the confirmation of wireless small-signal transmission power；
Step S26, mesh information forwarding table confirms：Arranged according to detection data ranking results according to the distance order of identification
Passive equipment carries out the information forwarding table of wireless network networking；When the step is used for Wireless Communication Equipment progress data message forwarding
It can be transmitted according to the priority selection remote equipment transmission of transmission instruction or near field communication devices；
Step S27, circulation diffusion networking：Repeat step S21~S26, equipment is carried out by way of circulating repetition diffusion
Transmission power confirm and small-signal diffusion networking；Until all devices being diffused into wireless network.
During the Variable power signal detection of step S21, Variable power is visited according to descending transmission power transmit power
Frame is surveyed, i.e., Variable power halves according to each transmission power reduction 3dbm, that is, power carries out Variable power detection；Using the Variable power side
Formula can effectively cover all Variable powers and passive equipment as much as possible, its signal detection precision highest；Which is used for first
Networking time-varying function detects.
During the Variable power signal detection of step S21, Variable power is visited according to transmission power transmit power from small to large
Frame is surveyed, i.e. Variable power doubles according to each transmission power increase 3dbm, that is, power and carries out Variable power detection；Using the change work(
Rate mode can reach predetermined low-power level signal value with most quick speed, its signal detection is fastest；Which is used for
Carry out repeating Variable power detection in the case of having determined that a small-signal transmission power after networking.
During the Variable power signal detection of step S21, detection number of frames N and each Variable power that active devices are sent are visited
The value of power reduction/power increase PWR_STEP can be determined according to the detection time and detection accuracy of equipment during survey, needed
The occasion of high detection accuracy and fixed wireless device is wanted, N values is bigger than normal, and PWR_STEP values are less than normal；Needing the short period
The occasion of detection and mobile wireless device is completed, N values is less than normal, and PWR_STEP values are bigger than normal.
In order to reduce the interference of wireless signal, all devices in wireless spatial domain, as long as receiving a frame power detection
After frame, all suspend current wireless telecommunications task, into silent reception pattern, the silence period is not have after 3 seconds, 3 seconds
After receiving any one power detection frame again, just allow to continue on the wireless telecommunications task suspended；The mechanism can be preferential
Ensure the wireless signal transmission of power detection frame, reduce the interference that the covering of wireless signal small range detects certainly, improve smart from detecting
Degree.
Signal strength entry in step S21 is divided into storage-type signal strength entry and mode transmission signal strength entry；Deposit
Storage type signal strength entry is used for the signal strength for recording the wireless signal that active devices are sent to passive equipment, includes transmitting work(
Five rate, received signal strength average value, received signal strength minimum value, reception frame losing quantity, receiving device parts；Launch work(
The transmission power of wireless signal when rate is active devices transmission information, it is the master that passive equipment receives to receive signal averaging
The signal strength average value of dynamic equipment wireless signal, received signal strength minimum value for the active devices that passive equipment receives without
The signal strength minimum value of line signal, receives the data that frame losing amount R lost how many a active devices for passive equipment, receives
Equipment is the ID sequence numbers of passive equipment；Mode transmission signal strength entry designs to improve radio transmission efficiency, it and
Standard signal intensity entry is mainly used for signal strength data in active devices and passive equipment compared to receiving device has been dispensed
Between quick transmission, improve radio transmission efficiency.
Signal strength entry data exchange and transmission in communication frames include power detection frame, detection data claim frame,
Detection data transmission frame；Power detection frame be used for active devices carry out radio transmitted power detection, comprising frame head, frame category,
Send frame sum, send frame number, detection frame transmission power, detection frame active devices ID, CRC check；Detection data claim frame
For active devices to passive equipment request signal intensity entry, comprising frame head, frame category, request frame number, request device id,
Active devices ID, passive equipment ID, CRC check；Detection data transmission frame is used for passive equipment to active devices mode transmission signal
Intensity entry, comprising frame head, frame category, signal strength sum, current frame signal intensity entry number, signal strength entry sequence number,
1~n of entry, claim frame active devices ID, acknowledgement frame passive equipment ID, CRC check；In order to save frame space, wireless pass is improved
Defeated efficiency, the signal strength entry in detection data transmission frame are transmitted using mode transmission signal strength entry.
Active devices and passive equipment are named during single signal detection, for each device node
Wireless signal transmission power is carried out from detection process, is had and an only active devices, and passive equipment is any number of；
In whole wireless network, proceeded by from gateway device from detecting, subsequently by the passive equipment nearest apart from gateway active devices
Carried out as active devices from detecting, which is a kind of wireless communication networks with master slave relation.
The present invention is diffused group using the gateway device of wireless network as start node using wireless small-signal transmission power
Net, can launch Variable power detection frame it is descending, by as far as it is near and ascending, from the near to the remote communicate wirelessly distance
Detection, all devices in wireless spatial domain are linked to using gateway device in the wireless network of starting point, to ensure wireless network
Network equipment can be chosen the radio transmitted power of minimum, ensure wireless signal on the premise of reliably networking communication and information forward
Coverage minimizes.Therefore, the present invention can both meet the requirement of small-signal transmission power automatic network-building, also reduce no net
Interference and influence of the network equipment on other equipment, while reduce the use that Wireless Communication Equipment power consumption extends battery apparatus
In the service life, finally can also utilize wireless frequency domain and spatial domain resource to greatest extent, greatly improve wireless network communication
Efficiency.In addition, the present invention solves the problems, such as Wireless Communication Equipment low-power level signal automatic network-building, without Wireless Communication Equipment
Configure maximum power, configure mesh information forwarding table without Wireless Communication Equipment, achieve the purpose that automatic network-building, without artificial
Intervene.
Brief description of the drawings
Fig. 1 is the overall flow chart of steps from detection.
Fig. 2 is that the calculating of transmitting power of equipment detects certainly and the direction displaying of small-signal diffusion is schemed.
Fig. 3 is the process displaying figure of Variable power signal detection.
Fig. 4 is the process displaying figure of detection data sequence.
Fig. 5 is the connection relationship diagram of device therefor of the present invention.
Embodiment
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
A kind of Wireless Communication Equipment small-signal diffusion network-building method shown in Fig. 1, the Wireless Communication Equipment in this method are
Finger has any number of Wireless Communication Equipment A, B, C, D, E, F, G ..., these Wireless Communication Equipment in a larger spatial domain
Between the interaction of wireless signal is carried out with identical wireless telecommunications frequency, suitable radio transmitted power, complete equipment and equipment
Between wireless networking communication, realize information exchange and the transmission of each equipment room；Described in order to facilitate subsequent file, will be all
The Wireless Communication Equipment for participating in wireless networking communication is named as device node, the wireless telecommunications frequency life that each device node uses
Entitled wireless frequency point, the radio transmitted power that each device node uses are named as wireless power.It will need to carry out wireless transmission
The device node from detection of power calculation is named as " active probe equipment ", referred to as " active devices ", it would be possible to and should
The device node that active probe equipment carries out wireless networking is named as " passive response apparatus ", referred to as " passive equipment "；At this
In the wireless communication networking of invention, wireless signal transmission power is carried out from detection process for each device node, is had and only
Have an active devices, and passive equipment can have it is any number of.In whole wireless network, proceeded by certainly from gateway device
Detection, subsequently carries out the passive equipment nearest apart from gateway active devices from detecting as active devices, which is one kind
Wireless communication networks with master slave relation.
In addition need to explain is：Active devices and passive equipment are ordered during single signal detection
Name, but in whole wireless network, all equipment is all the other equipment of ad eundem, all using identical from detection side
Formula, the detection mechanism and flow of all devices are all identical, without point of master-slave equipment, fully belong to a kind of channel radio of balanced type
Interrogate network.
In the wireless communication networking, there is one to initiate wireless power at first and calculate from the active devices A detected, name the master
Dynamic device A is " gateway active devices "；Since gateway active devices A, equipment hair is carried out to B, C, D, E, F, G ... direction
The calculating for penetrating power spreads wireless networking from detection and small-signal.As shown in Figure 2.
In this method is each to calculate by the transmission power of adjustment active devices A from big to small from detection mode
How many passive equipment can receive the wireless signal of active devices A under transmission power；And active devices A is detected to passively setting
The signal strength for the wireless signal that preparation is sent, judges passive equipment to the space length of active devices A, according to the space of equipment room
Distance carries out passive equipment distance-taxis, and it is crucial necessary by closely sorting then to choose several by active devices A
Passive equipment B, C, D communicate wirelessly networking, and thus active devices A is meeting these crucial necessary quilts closely
On the premise of dynamic equipment can be communicated securely and reliably, wireless networking communication is carried out using minimum radio transmitted power；So
Actively set to the adjustment of C, D, E, F, G ... direction from big to small as active devices from closest passive equipment B again afterwards
Standby transmission power carries out the calculating of transmitting power of equipment from detecting, and equipment B chooses the necessary by closely of several keys
Passive equipment C, D, E of sequence communicate wirelessly networking, and so circulation realizes the diffusion networking of Wireless Communication Equipment small-signal.
According to step point, the operating process from detection mode is as follows：
Step S21, Variable power signal detection：Detected using descending and ascending transmission power transmit power
Frame, the power detection frame is received by passive equipment, records the signal strength RSSI value received and tracer signal intensity entry；
Step S22, detection data exchanges：The signal strength entry that passive equipment records is transmitted to master by wireless signal
Dynamic equipment is simultaneously stored；
Step S23, detection data is grouped：After active devices store the signal strength entry for exchanging acquisition, according to signal
Transmission power in intensity entry carries out signal strength entry packet, and identical transmission power is divided into one group；The step is used for
The signal strength entry of multiple passive equipments to getting is grouped according to identical transmission power, is completed in a hair
Penetrate under power condition, there are multiple passive equipments by wireless coverage；
Step S24, detection data sorts：Received signal strength of the data after packet in signal strength entry is put down
Average, receive signal minimum, carries out signal strength entry sequence from big to small；The distance that the step completes passive equipment is known
Not；
Step S25, transmission power confirms：According to the demand of Wireless Communication Equipment actual wireless networking, active devices are determined
Wireless signal at least need to cover how many a passive equipments and carry out the final transmission power for confirming Wireless Communication Equipment；The step is complete
Into the confirmation of wireless small-signal transmission power；
Step S26, mesh information forwarding table confirms：Arranged according to detection data ranking results according to the distance order of identification
Passive equipment carries out the information forwarding table of wireless network networking；When the step is used for Wireless Communication Equipment progress data message forwarding
It can be transmitted according to the priority selection remote equipment transmission of transmission instruction or near field communication devices；
Step S27, circulation diffusion networking：Repeat step S21~S26, equipment is carried out by way of circulating repetition diffusion
Transmission power confirm and small-signal diffusion networking；Until all devices being diffused into wireless network.
Wherein, signal strength entry can be divided into storage-type signal strength entry and mode transmission signal strength entry.Storage
Type signal strength entry is used for the signal strength for recording the wireless signal that active devices are sent to passive equipment, includes transmission power
S_PWR, received signal strength average value RSSI_AVG, received signal strength minimum value RSSI_MIN, reception frame losing amount R SSI_
Five LOSE, receiving device ID RECV_ID parts；Transmission power S_PWR is wireless signal when active devices send information
Transmission power, receives the signal strength that signal averaging RSSI_AVG is the active devices wireless signal that passive equipment receives and puts down
Average, the signal strength for the active devices wireless signal that received signal strength minimum value RSSI_MIN receives for passive equipment is most
Small value, receives the data that frame losing amount R SSI_LOSE lost how many a active devices for passive equipment, receiving device RECV_
ID is the ID sequence numbers of passive equipment.Its structure composition is as shown in table 1.
Table 1
Mode transmission signal strength entry designs to improve radio transmission efficiency, it and standard signal intensity entry
Compared to receiving device RECV_ID has been dispensed, it is quick between active devices and passive equipment to be mainly used for signal strength data
Transmission, improves radio transmission efficiency.Its structure composition is as shown in table 2.
Table 2
In addition, this method is in order to facilitate active devices and the data exchange and biography of the wireless signal strength entry of passive equipment
It is defeated to devise three communication frames：1st, power detection frame, for active devices carry out radio transmitted power detection, comprising frame head,
Frame category, send frame sum, send frame number, detection frame transmission power, detection frame active devices ID, CRC check；2nd, number is detected
According to claim frame, for active devices to passive equipment request signal intensity entry, comprising frame head, frame category, request frame number, please
Ask device id, active devices ID, passive equipment ID, CRC check；3rd, detection data transmission frame, for passive equipment to actively setting
Standby mode transmission signal strength entry is strong comprising frame head, frame category, signal strength sum, current frame signal intensity entry number, signal
Spend entry sequence number, 1~n of entry, claim frame active devices ID, acknowledgement frame passive equipment ID, CRC check；In order to save in the frame
Frame space, improves radio transmission efficiency, and the signal strength entry in detection data transmission frame uses mode transmission signal strength entry
It is transmitted.Power detection frame, detection data claim frame, the structure of detection data transmission frame are respectively as shown in table 3, table 4, table 5.
Table 3
Table 4
Table 5
Variable power signal detection mode (such as Fig. 3) in step S21：1st, active devices A utilizes the wireless communication of device node
All passive equipments of the maximum radio transmitted power PWR_MAX at the same time into spatial domain are continuously quickly sent out possessed by number transmitter
Send N number of power detection frame, N≤255, acquiescence value N=32；Active devices record radio transmitted power PWR_SEND=PWR_
MAX, the transmission power field in power detection frame fill in the transmission power of current wireless transmitter, send frame number field and fill out
Which power detection frame writes currently transmitted is；2nd, passive equipment B will receive the M power spy of active devices A in spatial domain
Frame is surveyed, records the received signal strength value RSSI numerical value per frame, and the ID sequence numbers note of active devices is extracted from power detection frame
For S_ID, the radio transmitted power of extraction active devices A is denoted as S_PWR, and extraction sends frame sum N；3rd, formula (M-N) ÷ is utilized
N × 100% calculates frame loss rate, when passive equipment B receives the frame loss rate of power detection frame≤10%, represents passive equipment B energy
Enough wireless signals that can completely receive active devices A substantially, device node B weed out two RSSI numerals of maximum, and
The average value for calculating remaining M-2 RSSI numerical value is recorded as received signal strength average value RSSI_AVG, while from M-2
The RSSI records of values that minimum is chosen in RSSI numerical value is received signal strength minimum value RSSI_MIN, and record receives frame losing quantity
RSSI_LOSE=N-M=0；When passive equipment B receives the frame loss rate of power detection frame≤10%, represent that passive equipment B can leak
Fall the wireless signal of active devices A, the draw value that passive equipment B directly calculates each RSSI numerical value of M is recorded as received signal strength
Average value RSSI_AVG, while it is received signal strength minimum value to choose minimum RSSI records of values from M RSSI numerical value
RSSI_MIN, record receive frame losing amount R SSI_LOSE=N-M；4th, passive equipment B is calculated and is finished received signal strength average value
Afterwards, can be minimum by active devices S_ID, transmission power S_PWR, received signal strength average value RSSI_AVG, received signal strength
Value RSSI_MIN, receive the mode transmission signal strength entry that frame losing amount R SSI_LOSE records an active devices A；5th, similarly
The power detection frame that passive equipment C, D, E, F, G ... similar with passive equipment B can receive active devices A, calculates and remembers
Record the mode transmission signal strength entry of an active devices A；6th, active devices are after N number of power detection frame is sent, delay 1
Second kind waits passive equipment to calculate and record the mode transmission signal strength entry of active devices A, and subsequent active devices A is wireless by its
Transmission power is reduced according to formula PWR_SEND=PWR_SEND-PWR_STEP, work(when PWR_STEP detects for each Variable power
The power value that rate reduces, acquiescence PWR_STEP=3dbm transmission powers halve, in Variable power detection from small to large, PWR_
STEP increases 3dbm transmission powers double, and continue all passive equipments into spatial domain of repeat step 1~5 and send N number of power detection
Frame；Passive equipment B, C, D, E, F, G ... can receive, calculate, recording the mode transmission signal strength bar of a new active devices A
Mesh；7th, and so on, repeat step 1~6, until the radio transmitted power of active devices node A is reduced to ＜ -6bdm or increasing
Untill being added to default transmission power, stop the transmit power into spatial domain and detect frame；So far Variable power signal detection is fully completed,
The mode transmission signal strength entry of some active devices A, distance can be recorded in each passive equipment B, C, D, E, F, G ...
Passive equipment nearer active devices A, its mode transmission signal strength number of entries is more, and signal strength numerical value is bigger, frame losing
Quantity is fewer, and frame loss rate is lower, the passive equipment more remote apart from active devices A, its mode transmission signal strength number of entries is fewer,
Even one does not all have, and signal strength numerical value is smaller, and frame losing quantity is more, and frame loss rate is higher.
In order to reduce the interference of wireless signal, all devices in wireless spatial domain, as long as receiving a frame power detection
After frame, all suspend current wireless telecommunications task, the silent reception pattern into 3 seconds, the silence period is not have after 3 seconds, 3 seconds
Have after receiving any one power detection frame again, just allow to continue on the wireless telecommunications task suspended；The mechanism can be excellent
First ensure the wireless signal transmission of power detection frame, reduce interference of the wireless signal small range covering from detection, improve certainly
Detection accuracy.
During the Variable power signal detection of step S21, Variable power is visited according to descending transmission power transmit power
Frame is surveyed, i.e., Variable power halves according to each transmission power reduction 3dbm, that is, power carries out Variable power detection；Using the Variable power side
Formula can effectively cover all Variable powers and passive equipment as much as possible, its signal detection precision highest；Which is used for first
Networking time-varying function detects.
During the Variable power signal detection of step S21, Variable power is visited according to transmission power transmit power from small to large
Frame is surveyed, i.e. Variable power doubles according to each transmission power increase 3dbm, that is, power and carries out Variable power detection；Using the change work(
Rate mode can reach predetermined low-power level signal value with most quick speed, its signal detection is fastest；Which is used for
Carry out repeating Variable power detection in the case of having determined that a small-signal transmission power after networking.
Passive equipment B, C, D, E, F, G ... all into spatial domain active devices A in this method are sent power
After detecting frame and recording mode transmission signal strength entry in passive equipment, step S22 detection datas can be carried out immediately and exchanged：1、
Active devices A using maximum radio transmitted power PWR_MAX possessed by the wireless signal transmitter of device node at the same time to
All passive equipments in spatial domain send detection data claim frame, it is desirable to which passive equipment B is by the letter of the active devices A of self record
Number intensity entry is transferred to active node A；2nd, after passive equipment B receives detection data claim frame, can be maximum with transmitter
Radio transmitted power PWR_MAX replys detection data transmission frame, mode transmission signal strength entry to active devices A；In order to improve
Efficiency of transmission, saves transmission space, is transmitted in transmitting procedure using the form of mode transmission signal strength entry, in postamble
The ID of the ID and passive equipment B of an active devices A is added representing the launch party A of signal strength entry and recipient B in portion；
3rd, after the signal strength entry of passive equipment B records is all transferred to active devices A, active devices A can be in mode transmission signal
The ID of intensity entry afterbody addition power detection frame recipient's passive equipment B, composition storage-type signal strength entry are stored；
4th, similarly signal strength entry similar with passive equipment B can be transferred to active devices A by passive equipment C, D, E, F, G ...,
And by active devices A in the ID of signal strength entry afterbody addition power detection frame recipient, composition storage-type signal strength bar
Mesh is stored；So far active devices A is completed by detection data claim frame and detection data transmission frame and all can collected
The collection and storage of the signal strength entry arrived.
Active devices A after the signal strength entry that whole passive equipments transmit is received in spatial domain, immediately into
Row step S23 detection datas are grouped, and entry packet are carried out according to the transmission power S_PWR in signal strength entry, by identical hair
The entry for penetrating power S_PWR is each separated into one group；The present invention can be got over the reduction of radio transmitted power, wireless coverage
Small, the passive equipment that can receive power detection frame can be fewer, and the signal strength entry of packet can be fewer.
The detailed process of detection data sequence is in step S24：1st, it is each after identical transmission power S_PWR is grouped
The size of a signal strength entry basis signal average strength, is ranked up from big to small；Occurs signal in sequencer procedure
When average strength is identical, according to the size of signal strength minimum value, it is ranked up from big to small；If two neighboring entry is most
During small-signal intensity difference≤3dbm, compare the frame losing quantity of two entries, the few entry of frame losing quantity is come before, frame losing
Entry more than quantity comes end；2nd, after being sorted to each S_PWR signal strength entries being grouped, more each S_
The passive equipment ID's that PWR is grouped in entry puts in order, and according to majority rule, carries out the sequence of passive equipment ID, by
Nearer apart from the space length of active devices in passive equipment, its passive equipment received signal intensity level is bigger, conversely, by
After signal strength sorts and passive equipment ID majority rules principle sorts, the passive equipment more come above is nearer apart from main equipment,
It is better suited for active devices and carries out wireless signal small range covering, the passive equipment more come below is more remote apart from active devices,
Active devices need not carry out wireless signal covering to it；To signal strength entry after detection data sorts (such as Fig. 4) root
Nearest apart from active devices A according to the order passive equipment B of sequence, passive equipment C takes second place, and passive equipment F, G is apart from active devices A
Farthest.
After active devices A completes detection data sequence, carry out step S25 transmission powers and confirm, set according to wireless network
The demand of standby actual wireless networking, determines that the wireless signal of active devices A at least needs to cover how many a passive equipments, directly from
In the result of the 18th article of detection data packet of the present invention, by the quilt in each packets of sequential search contrast of S_PWR from small to large
Dynamic device id and the passive equipment ID for being actually needed covering, the passive equipment ID in contrast packet is searched can include actual need
During the passive equipment ID to be covered, the S_PWR of the packet is the wireless communication that active devices A carries out wireless signal small range covering
Number transmission power, all will be with the S_PWR radio transmitted powers when Wireless Communication Equipment A carries out normal wireless networking communication
Carry out wireless networking communication.
Active devices A complete transmission power confirm after, it is necessary to carry out step S26 mesh informations forwarding table confirm, according to
Detection data ranking results carry out the information forwarding table of wireless network networking according to distance order arrangement passive equipment B, C, D.
Circulation diffusion networking is that active devices A completes transmission power confirmation and mesh information forwarding table confirms in step S27
Afterwards, the operation by the equipment B nearest with device A as active devices repeat step S21~S26, carries out in the same manner
Radio transmitted power calculates and small-signal extension networking from detection；Thus by circulating repetition spread mode carry out equipment C,
D, the transmission power of E, F, G ... confirm and spread networking.
In Variable power signal detection, power drops when the detection number of frames N and each Variable power of active devices transmission are detected
The value of low/power increase PWR_STEP can be determined according to the detection time and detection accuracy of equipment, need high detection essence
The occasion of degree and fixed wireless device, can be bigger than normal by N values, and PWR_STEP values are less than normal；Complete to visit needing the short period
The occasion with mobile wireless device is surveyed, can be less than normal by N values, PWR_STEP values are bigger than normal.
When needing high reliability wireless networking to communicate, in order to avoid the interference of wireless telecommunications external environment condition, complete to lead
After dynamic equipment radio transmitted power S_PWR calculates confirmation, carried out S_PWR=S_PWR+PWR_STEP as final S_PWR
Wireless group Netcom, to ensure that Wireless Communication Equipment has enough transmission powers to carry out wireless signal small range covering.
When detection data is grouped, if the frame loss rate in signal strength entry>When 50%, then illustrate main under the transmission power
Dynamic equipment can not carry out reliable and stable wireless telecommunications with passive equipment, contrast other signal strength entries, judge actively to set
Whether standby and passive equipment has communication failure problem.
This method will be arranged with all passive equipment B, C, D, E, F, G ... that active devices A is communicated according to signal strength values
Sequence, signal strength numerical value is higher, and the signal quality for representing networking is better, equipment sequence more come before, even in special circumstances
Under due to the reasons such as device hardware failure, space obstacle cause passive equipment in physical space and the distance of active devices A compared with
Near device signal is second-rate, and when the preferable situation of distant device signal quality is launched, remain unchanged prioritizing selection signal
The measured passive equipment of strength values high RST matter is as wireless data transmission and the equipment of data forwarding, so that logically not
It can influence the communication performance and data forwarding performance of wireless networking.
The key innovations of the present invention have：
1st, exchanged using detection data, passive equipment and active devices are realized by the received signal strength of passive equipment
Communication distance calculates；
2nd, sorted using detection data, complete the distance identification of passive equipment；
3rd, exchanged using detection data, complete the directionality problem of the passive equipment near active devices；
4th, by the detection of Variable power signal, can be calculated automatically according to the number of devices for being actually needed wireless coverage
Minimum wireless small-signal coverage；
5th, after equipment wireless signal small range calculates, in the case of actual physical distance change, as long as
The signal strength of logic is constant, and the wireless signal small range covering calculated will not influence wireless telecommunications and the data of equipment room
Forwarding, it is not necessary to frequently carry out plant capacity adjustment and data forwarding tune since the movement of equipment causes physical distance to change
It is whole.
Compared with prior art, the present invention have the advantage that：
1st, Wireless Communication Equipment reliable communicating is being ensured by the way that each Wireless Communication Equipment can be calculated from detection mode
On the premise of communicated wirelessly using minimum radio transmitted power.
2nd, for Wireless Communication Equipment under each different actual installation environment, selection that can be adaptive is most rational wireless
Transmission power.
3rd, can be very intuitively according to signal strength for Wireless Communication Equipment distant or that communication packet loss is higher
Entry is summarized as the insecure classification of wireless telecommunications, the convenient investigation for carrying out wireless network communication failure.
4th, the measuring and calculating of the communication distance of Wireless Communication Equipment can not only be completed by way of spreading networking, moreover it is possible to
Enough confirmations that radio network information forwarding table is carried out by way of automatic network-building, eliminate human configuration mesh information forwarding table
The step of, accomplish networking automation.
The present invention can be implemented using different CPU processor and wireless communication module, specific with reference to one
The equipment used in the present invention is described in detail in embodiment.
Equipment used in this method is made of (as shown in Figure 5) following several parts：1st, CPU processor, uses
STM32F103RB chips, the chip processor are built-in with the FLASH memory spaces and 20Kbyte of 128Kbyte
The FLASH memory spaces are divided into the memory space of 2 64Kbyte, first 64Kbyte by RAM memory spaces, the present embodiment
Space is used for the execution code for storing CPU processor, and second FLASH memory space is used to store storage-type signal strength bar
Mesh, each storage-type signal strength entry take 12Byte spaces, can at least store 5120 storage-type signal strength entries,
And device looses power and reset are restarted and will not be lost, ensure that device looses power or reset restart after, equipment being capable of quick basis
Need the wireless small-signal transmission power of restorer；The mode transmission signal produced during Variable power signal detection is carried out is strong
Degree entry is stored in RAM memory spaces, since every mode transmission signal strength entry takes 4Byte, can at least be stored
4000 mode transmission signal strength entries；2nd, wireless communication module, wireless signal is carried out using SX1278 wireless communication modules
Receive and transmitting, the wireless communication module not external external power amplifier when, the maximum transmission power of its hardware device is
20dbm, receiving sensitivity can up to -140dbm；3rd, external FLASH memory, using M25P32 chips, has 4Mbyte's
FLASH memory spaces, this external FLASH memory is inessential device, is only had in the range of a small spatial domain very more
Wireless Communication Equipment, and when carrying out Variable power signal detection, it is desirable to which detection accuracy is very high, just need during PWR_STEP value very littles
External FLASH memory is wanted to store storage-type signal strength entry, in addition utilizes the FLASH inside CPU processor
Space can meet general wireless network signal small range covering application；For huge there are quantity in the range of a small spatial domain
Big Wireless Communication Equipment, can use the FLASH memory of larger capacity with SPI interface, or be connect using spi bus
The FLASH memories of multiple large capacities mouthful is connected to store more storage-type signal strength entries；4th, DC power supply management core
Piece is used for as CPU processor, wireless communication module, external FLASH memory.
4000 mode transmission signal strengths can be at least stored in the RAM memory spaces of 20Kbyte inside CPU processor
Entry, according to the SX1278 wireless communication module maximum transmission power 20dbm of the present embodiment, each PWR_STEP=3dbm meters
Calculate, there be totally 9 grades of 20dbm, 17dbm, 14dbm, 11dbm, 8dbm, 5dbm, 2dbm, -1dbm, -4dbm in when Variable power signal detection
Transmission power carries out Variable power signal detection, and each Variable power signal detection can only produce 9 signal strength entries, each passive
Equipment at most only needs to store 9 mode transmission signal strength entries, and the RAM memory spaces inside CPU processor can hold at the same time
That receives at least 400 active devices is sent to power detection frame；According to the mode of time-dividing storage, unlimited number can be stored
The active devices of amount are sent to power detection frame.
The present invention sets the equipment ID number of unique 8 byte to distinguish each equipment on each device
Identity；Equipment in process of production, unique 8 byte ID is write into the CPU processor in-chip FLASH of equipment；Active devices
Wireless network transmission power is being carried out from when detecting, the ID sequence numbers of equipment itself are sent to passive equipment by power detection frame,
Represent that device id carries out wireless transmission with power P WR_SEND；Device id due to 8 bytes is carrying out signal entry storing process
It is middle to take excessive memory space, can be by the device id in the wireless network networking communication applications of some lesser amts
It is set as 4 bytes to represent the unique identities of equipment, can also be using 4 bytes of equipment or the address of 2 bytes one
The unique identities of equipment are represented in a subrange space.
In order to improve the anti-interference of power detection frame, detection data claim frame, detection data transmission frame, in each type
Frame before using 2 fixed byte frame head, frame head value 0xFFFA；Frame type uses 1 byte representation, and 0x01 is represented
Power detection frame, 0x02 detection datas claim frame, 0x03 detection data transmission frames；The frame of each type uses CRC16 check codes
Verify the correctness of frame.
In order to improve the short frame frame length that 16 bytes are fixed in the detection frame use of wireless signal transmission efficiency power, and each power
Detection frame is quickly sent using continuous wireless signal, since the frame of each PWR_SEND transmission power sends n times, passive
When power detection frame is received in equipment, a small amount of power detection frame is lost, will not affect that overall Effect on Detecting and wireless communication
The covering of number transmission power signal small range from detecting.
Detection data claim frame carries out the transmission of the request command of detection data using the short frame frame length for fixing 30 bytes, main
Dynamic equipment can be in any moment hair of the equipment in addition to during power detection frame is sent in progress detection data request command
Go out, and multiple claim frame can be sent, each request time request sequence number adds 1, and to tell passive equipment, which has sent out
Send repeatedly；Device id is asked in frame to represent by that equipment in request detection data, active devices ID and passive in frame
Device id is representing to ask the signal strength bar that active devices is produced to the power detection frame that passive equipment is sent
Mesh detection data, in detection data exchange process, asks device id and active devices ID all to fill in the active of power detection frame
Device id, passive equipment ID fill in the passive equipment ID of request；The design that such detection data claim frame passes through three device ids
It can be good at meeting detection data switching task.
Detection data transmission frame carries out the transmission of signal strength entry using elongated frame length, and a frame only transmits an active and sets
The signal strength entry of the standby function detection frame generation sent to a passive equipment；Active devices ID and passive equipment ID in frame
Set to represent the active devices ID of the transmit power of signal strength entry detection frame respectively and receive the passive of power detection frame
Standby ID, and be transmitted using broadcast wireless signal mode, all devices can receive the transmission frame in spatial domain, passive
When equipment B is to active devices A progress detection data exchange process mode transmission signal strength entries, equipment C can also receive equipment B
Detection data between device A exchanges entry, when transmitting the signal strength entry of active devices D to passive equipment E, equipment
A, B, C can receive the entry that the frame is exchanged as detection data, can so make full use of wireless telecommunications broadcast advantage to reduce
Detection data exchanges the number of entry, improves the communication efficiency of wireless network.
A length of 512 byte of detection data transmission frame largest frames in the present invention, a frame maximum can transmit 122 signal strengths
Entry, calculates according to each PWR_STEP=1dbm, can transmit the Variable power signal detection that maximum transmission power is 116dbm
Frame, so big transmission power are enough all wireless signal transmitters in covering working application.
The above embodiment is not limitation of the present invention, and the present invention is also not limited to the example above, this technology neck
The variations, modifications, additions or substitutions that the technical staff in domain is made in the range of technical scheme, also belong to this hair
Bright protection domain.
Claims (8)
1. a kind of Wireless Communication Equipment small-signal spreads network-building method, it is characterised in that：The step of the method, is as follows：
Step S1, the Wireless Communication Equipment by all participation wireless networking communications is named as device node；It will need to carry out wireless
The device node that transmission power calculates is named as active devices；Would be possible to and the active devices carry out wireless networking equipment section
Point is named as passive equipment；
Step S2, device node is made to communicate wirelessly networking by the way of detecting certainly；, will at first in wireless communication networking
Initiate the active devices that wireless power is calculated from detection and be named as gateway active devices；Since the gateway active devices, Xiang Qi
The calculating that its device node direction carries out transmitting power of equipment spreads wireless networking from detection and small-signal；Gateway active devices are complete
Into from after detecting, the equipment nearest apart from gateway active devices is carried out from detecting as active devices, so circulation is until expanding
It is scattered to all devices of whole wireless communication networks；
The overall step from detection is as follows：
Step S21, Variable power signal detection：Frame is detected using descending and ascending transmission power transmit power, by
Passive equipment receives the power detection frame, records the signal strength RSSI value received and tracer signal intensity entry；
Step S22, detection data exchanges：The signal strength entry of passive equipment record is transmitted to actively setting by wireless signal
It is standby and stored；
Step S23, detection data is grouped：After active devices store the signal strength entry for exchanging acquisition, according to signal strength
Transmission power in entry carries out signal strength entry packet, and identical transmission power is divided into one group；The step is used for obtaining
The signal strength entry for the multiple passive equipments got is grouped according to identical transmission power, is completed and is launched work(at one
Under the conditions of rate, there are multiple passive equipments by wireless coverage；
Step S24, detection data sorts：Received signal strength of the data after packet in signal strength entry is averaged
Value, receive signal minimum, carries out signal strength entry sequence from big to small；The distance that the step completes passive equipment is known
Not；
Step S25, transmission power confirms：According to the demand of Wireless Communication Equipment actual wireless networking, the nothing of active devices is determined
Line signal at least needs to cover the transmission power that how many a passive equipments finally to confirm Wireless Communication Equipment；The step completes
The confirmation of wireless small-signal transmission power；
Step S26, mesh information forwarding table confirms：Arranged passively according to the distance order of identification according to detection data ranking results
Equipment carries out the information forwarding table of wireless network networking；Can when the step is for Wireless Communication Equipment progress data message forwarding
According to the priority selection remote equipment transmission or near field communication devices transmission of transmission instruction；
Step S27, circulation diffusion networking：Repeat step S21~S26, carries out the hair of equipment by way of circulating repetition diffusion
Power is penetrated to confirm and small-signal diffusion networking；Until all devices being diffused into wireless network.
2. Wireless Communication Equipment signal small range covering method according to claim 1, it is characterised in that：The step
During the Variable power signal detection of S21, Variable power detects frame, i.e. Variable power according to descending transmission power transmit power
3dbm, that is, power, which is reduced, according to each transmission power halves progress Variable power detection；Institute can effectively be covered using the Variable power mode
There are Variable power and passive equipment as much as possible, its signal detection precision highest；Which is visited for networking time-varying function first
Survey.
3. Wireless Communication Equipment signal small range covering method according to claim 1, it is characterised in that：The step
During the Variable power signal detection of S21, Variable power detects frame, i.e. Variable power according to transmission power transmit power from small to large
Doubled according to each transmission power increase 3dbm, that is, power and carry out Variable power detection；Use the Variable power mode can be with most fast
The speed of speed reaches predetermined low-power level signal value, its signal detection is fastest；Which is for true after networking
Determine to carry out repeating Variable power detection in the case of a small-signal transmission power.
4. the Wireless Communication Equipment signal small range covering method according to Claims 2 or 3, it is characterised in that：The step
During the Variable power signal detection of rapid S21, power drops when the detection number of frames N and each Variable power of active devices transmission are detected
The value of low/power increase PWR_STEP can be determined according to the detection time and detection accuracy of equipment, need high detection essence
The occasion of degree and fixed wireless device, N values is bigger than normal, and PWR_STEP values are less than normal；Need the short period complete detection and
The occasion of mobile wireless device, N values is less than normal, and PWR_STEP values are bigger than normal.
5. Wireless Communication Equipment signal small range covering method according to claim 4, it is characterised in that：In order to reduce nothing
The interference of line signal, all devices in wireless spatial domain, as long as after a frame power detection frame is received, all pause is current
Wireless telecommunications task, into silent reception pattern, the silence period is not receive the spy of any one power after 3 seconds, 3 seconds again
After surveying frame, just allow to continue on the wireless telecommunications task suspended；The mechanism can preferentially ensure the wireless of power detection frame
Signal transmission, reduces the covering of wireless signal small range from the interference of detection, improves from detection accuracy.
6. Wireless Communication Equipment signal small range covering method according to claim 1, it is characterised in that：The step
Signal strength entry in S21 is divided into storage-type signal strength entry and mode transmission signal strength entry；The storage-type signal
Intensity entry is used for the signal strength for recording the wireless signal that active devices are sent to passive equipment, comprising transmission power, receives
Signal strength average value, received signal strength minimum value, receive five frame losing quantity, receiving device parts；Based on transmission power
The transmission power of wireless signal during dynamic equipment transmission information, it is the active devices that passive equipment receives to receive signal averaging
The signal strength average value of wireless signal, received signal strength minimum value are the active devices wireless signal that passive equipment receives
Signal strength minimum value, receive the data that frame losing amount R lost how many a active devices for passive equipment, receiving device is
The ID sequence numbers of passive equipment；The mode transmission signal strength entry designs to improve radio transmission efficiency, it and mark
Calibration signal intensity entry is mainly used for signal strength data between active devices and passive equipment compared to receiving device has been dispensed
Quick transmission, improve radio transmission efficiency.
7. Wireless Communication Equipment signal small range covering method according to claim 6, it is characterised in that：The signal is strong
Spending communication frames of the entry in data exchange and transmission includes power detection frame, detection data claim frame, detection data transmission frame；
The power detection frame be used for active devices carry out radio transmitted power detection, comprising frame head, frame category, send frame sum,
Send frame number, detection frame transmission power, detection frame active devices ID, CRC check；The detection data claim frame is used for actively
Equipment includes frame head, frame category, request frame number, request device id, active devices to passive equipment request signal intensity entry
ID, passive equipment ID, CRC check；The detection data transmission frame is used for passive equipment to active devices mode transmission signal strength
Entry, includes frame head, frame category, signal strength sum, current frame signal intensity entry number, signal strength entry sequence number, entry 1
~n, claim frame active devices ID, acknowledgement frame passive equipment ID, CRC check；In order to save frame space, raising is wirelessly transferred effect
Rate, the signal strength entry in detection data transmission frame are transmitted using mode transmission signal strength entry.
8. Wireless Communication Equipment signal small range covering method according to claim 1, it is characterised in that：The active is set
Standby and passive equipment is named during single signal detection, and wireless signal hair is carried out for each device node
Power is penetrated from detection process, is had and an only active devices, and passive equipment is any number of；In whole wireless network
In, proceeded by from gateway device from detecting, subsequently by the passive equipment nearest apart from gateway active devices as active devices
Carry out from detecting, which is a kind of wireless communication networks with master slave relation.
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