CN104967969B - The anti-interference adaptive wireless communications platform of multi tate and its decision-making technique - Google Patents
The anti-interference adaptive wireless communications platform of multi tate and its decision-making technique Download PDFInfo
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- H—ELECTRICITY
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- H04W—WIRELESS COMMUNICATION NETWORKS
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Abstract
The present invention provides a kind of anti-interference adaptive wireless communications platforms of multi tate, communications platform is mainly by control unit, wireless transmission unit and sensor unit composition, control unit is responsible for the judgement and switching and the realization of communication protocol of communication pattern, wireless transmission unit is responsible for the wirelessly transmitting data of platform, sensor unit is responsible for environment and image information around acquisition platform, scheduling and control centre of the control unit as platform, the difference of communication mode is selected according to the transmission range difference with adjacent communication node, the beneficial effects of the invention are as follows changed due to can be realized according to a variety of application demands and channel circumstance of platform, adaptive three kinds of communications of switching, it is able to carry out real-time detection, it carries out quickly optimizing judgement, by three kinds of communication mode fusions in a system, data can be mutual The information exchange between different communication modes is realized in conversion.
Description
Technical field
The present invention relates to wireless communication technology fields, especially adaptively switch communication mode.
Background technique
With the gradually development of radio network technique, either under the application conditions of industry control occasion, or common
In life application, the wireless transmission of short-distance and medium-distance is all by very close concern.Short-distance and medium-distance WLAN has equipment
Simply, ad hoc network, it is highly reliable, inexpensive the features such as, and be gradually applied to every field.Short-distance and medium-distance wirelessly communicate at present
Technology specifically includes that Wireless Fidelity (WiFi), short-distance wireless communication technology (Zigbee), superfrequency (UHF) technology etc..It is single
The communication technology be unable to satisfy more dynamics, adaptively, multi tate is adjustable and jamproof requirement.Therefore proposed by the present invention
The anti-interference adaptive communication platform of multi tate is by Wireless Fidelity (WiFi), short-distance wireless communication technology (Zigbee) and superfrequency
(UHF) three kinds of wireless communication techniques are fused together, and pass through the adaptive switching of the variation of assessment channel situation and application demand
Communication mode, and then realize the robustness and optimization of wireless network performance.The characteristics of below to three kinds of wireless communication techniques and
It is analyzed application.
Zigbee is the low-power consumption personal area network agreement based on IEEE802.15.4 standard, low rate, low-power consumption, low cost
Etc. characteristics become the main support technology of wireless sensor network.Zigbee is as a kind of emerging short-distance wireless communication skill
Art is just pushing the development of low rate wireless personal area network.
WiFi technology is based primarily upon 802.11 series standard of IEEE, is that one kind can be by PC, handheld device (such as
Plate, mobile phone) etc. the technology that wirelessly interconnects of terminals.Not with the characteristics such as low rate, the low-power consumption of ZigBee technology
Together, WiFi technology has the characteristics that high-speed, highly reliable, low delay.
Superfrequency (UHF) then refers to that working frequency is the wireless communication technique of 300~3000MHz superfrequency, has and stablizes
Property high, the strong feature of radianting capacity.And UHF communication technology terminal is practical, can use easy hardware or hardware connects
Mouth carries out high-speed traffic.Relative to Zigbee and Wifi Radio Transmission Technology, there is low rate, penetrability is strong, long transmission distance
The characteristics of, it can be used for the wireless transmission of short-distance and medium-distance.
Wireless Fidelity (WiFi) has the message transmission rate of high speed, supports multiple access.But working frequency range is complete
Ball exempts to apply for 2.4Ghz ISM (Industrial Scientific Medical frequency range) channel, and frequency range is higher, and interference is strong, and the loss of propagation path is big,
Transmission range is close, and can not support multi-hop transmission.Secondly the power consumption of Wifi Radio Transmission Technology is big, does not support to energy-sensitive
Wireless sensor network.Zigbee has the characteristics that low-power consumption, supports wireless self-networking, compatible multi-hop transmission mode.But
The message transmission rate of Zigbee is low, and the time delay that multi-hop transmission will lead to data transmission is larger, is unable to satisfy real time data interaction
Application.UHF radianting capacity is strong, and penetration power is good, in the more indoor environment of barrier, long transmission distance.In an outdoor environment,
The time delay of data transmission can be reduced with single-hop transmission data for the horizon grange within 10Km.
Summary of the invention
In order to overcome the application range of single communication mode in existing wireless communications technology narrow, message transmission rate can not
It adjusts, it can not switching at runtime frequency range be anti-interference and the feature of low-power consumption energy conservation, analysis are found above-mentioned three kinds of wireless communication techniques
It is fused together, the switching of various wireless communication technology is realized by adaptive algorithm.The main control chip of radio communication platform selects
Adaptive switching communication mode algorithm is realized with on-site programmable gate array FPGA.Digital Logic in fpga chip mainly passes through
Acquisition applications condition, data delay requirement, the information such as wireless channel disturbed condition and platform energy, dynamic analysis judgement,
Finally realize the switching of three kinds of communications.
The technical solution adopted by the present invention to solve the technical problems is:
The hardware system of the anti-interference adaptive wireless communications platform of multi tate specifically includes that control unit 1, wireless transmission are single
Member 2 and 3 three parts of sensor unit composition；Control unit 1 is mainly made of on-site programmable gate array FPGA, is responsible for communication
The judgement and switching of mode and the realization of communication protocol；Wireless transmission unit 2 is by UHF wireless module 21, Wifi wireless module
22 and Zigbee wireless module 23 forms, and is responsible for the wirelessly transmitting data of platform；Sensor unit 3 is mainly by temperature and humidity sensing
Device 31, imaging sensor 32 and acceleration transducer 33 form, the environment and image information being responsible for around acquisition platform；
Scheduling and control centre of the control unit 1 as platform, wireless transmission unit 2 and sensor unit 3 are logical
It crosses electric interfaces to be connected with control unit 1, as peripheral hardware, completes fixed function；
The wireless transmission unit 2 is by UHF wireless module 21, Wifi wireless module 22 and Zigbee wireless module 23
Composition, three wireless modules pass through IC bus IIC, synchronous serial Peripheral Interface SPI, general-purpose serial bus USB, asynchronous
Serial interface RS232 is connected with the FPGA of control unit 1；
The sensor unit 3 is mainly by Temperature Humidity Sensor 31, imaging sensor 32 and acceleration transducer 33
Composition；After radio communication platform powers on, Temperature Humidity Sensor 31, imaging sensor 32 and acceleration transducer 33 are completed just
Beginningization waits FPGA to control signal；When control unit 1FPGA by IC bus IIC, synchronous serial Peripheral Interface SPI,
After general-purpose serial bus USB, asynchronous serial port interface RS232 communication interface send the order of request data, sensor reads corresponding
The data of the Temperature and Humidity module of acquisition, geographic coordinate information, are sent to the FPGA of control unit 1 by instruction by above-mentioned communication interface,
FPGA saves corresponding data in memory；
FPGA switching selection the Wireless Fidelity WiFi, tri- kinds of short-distance wireless communication Zigbee, superfrequency UHF channel radios
Then letter mode is drawn high the enable signal of wireless communication module, delivered a packet to by general Data Transport Protocol
Wireless transport module, wireless transport module in local memory, then send out received data pack buffer by Radio Link
It sees off, when data are sent, returned data end of transmission signal is to FPGA；The transmission of digital signal will be selected by FPGA
The data that the control instruction or sensor of transmitting obtain pass to above-mentioned three kinds of wireless transport modules, and then wireless module caches
Data are launched data by wireless channel by modulation.
The present invention also provides be related to the method for control unit 1 progress decision and analysis.
Control unit 1 of the present invention is responsible for the task schedule of entire radio communication platform, and communication protocol is realized, data
The function of analysis processing and communication mode switching, implements step are as follows:
Step 1: entire radio communication platform is powered on and initialized parameter or enters dormant state after setting up timed task；
Step 2: when having request of data to reach or the arrival of timed task time, the FPGA internal logic of control unit 1 is certainly
It is dynamic to wake up, carry out the transmission of data task；
Step 3: control unit 1 completes wireless sensor data acquisition tasks；
Step 4: control unit 1 is before carrying out wireless data transmission, advanced Mobile state decision, selects the channel radio optimized
Letter mode is completed to switch；
The specific judgment method that the dynamic decision and selection optimizes are as follows:
Step 4.1: the FPGA of control unit 1 is first analyzed and is calculated and the transmission range of adjacent communication node, communication distance
Parameter is calculated by obtaining the geographical coordinate of itself and communication node, active when external node sends data packet or instruction
The geographical coordinate of itself is carried, the information containing neighbors geographical coordinate received is stored in local by radio communication platform
In depositing, the neighbors refers to the node for there was only single-hop transmission distance apart from this node；
Step 4.2: when the transmission range of radio communication platform and neighbors is greater than 1km, control unit 1 selects UHF21
Communication, after UHF21 wireless communication module is enabled, Exit Decision-making deterministic process starts communication data transfer；
Step 4.3: when communication distance is within the distance of 100m~1000m, and there is no interference for the channel of 2.4Ghz
When, the radio frequency amplifier of Zigbee23 is opened, after enabling to select Zigbee23 communication, Exit Decision-making deterministic process,
Start communication data transfer；
Step 4.4: if there are biggish channel fading or artificial interference in 2.4Ghz frequency range, enabling selection
After the UHF21 communication of 433Mhz, Exit Decision-making deterministic process starts communication data transfer；
Step 4.5: if transmission range, within 100m, data transmission delay requirement is small, and data task amount is big, using
Wifi22 carries out data transmission, Exit Decision-making deterministic process, starts communication data transfer；
Step 4.6: if not requiring data delay, and channel disturbance is not serious, that is, using the radio band of 2.4Ghz
Transmit data, the received error rates of data of neighbors is low, can correctly reply handshaking information, using low-power consumption Zigbee23 without
Line number starts communication data transfer according to transmission, Exit Decision-making deterministic process；
Step 5: control unit 1 selects after communication mode the transmission for carrying out data by decision optimization in step 4, furthermore
Communication protocol is directed to control command, and the image data of short byte data and slab is respectively adopted different Handshake Protocols and is counted
According to interaction: byte number is less than the data packet of 64bytes, using shaking hands twice；Image data greater than 64bytes, is counted
According to segmentation, every 64bytes is packaged into a data frame, then using repeatedly shaking hands, continuously transmits data packet；
Step 6: control unit 1 is once again set up task timing, otherwise enters suspend mode shape after having carried out data transfer task
State.
The beneficial effects of the invention are as follows being changed due to can be realized according to a variety of application demands and channel circumstance of platform, certainly
Three kinds of communications of switching of adaptation, control unit can application requirement to radio communication platform, message transmission rate,
Delay requirement, channel disturbance situation and platform energy are detected in real time；According to the information of acquisition, quickly optimized
Judgement switches communication, and furthermore control unit devises a set of communication protocol, by three kinds of communication mode fusions at one
System, data can be converted mutually, be a multiple gateway system；Data friendship can be carried out with the node for carrying single communication mode
Mutually, and by data by another communication pattern launch, realize the information exchange between different communication modes.
Detailed description of the invention
Fig. 1 is the hardware system framework of the anti-interference adaptive wireless communications platform of multi tate.
Fig. 2 is the mission flow diagram of entire radio communication platform.
Fig. 3 is the flow chart of control unit dynamic decision selection communication mode.
Fig. 4 is the communication protocol that single handshake method is used between node.
Fig. 5 is the handshake communication agreement twice of the short byte data of interaction between node.
Fig. 6 is the multiple handshake communication agreement of interaction figure picture and slab data between node.
Fig. 7 is that the node of multiple and different communication modes realizes the data transmission and interaction of across a network.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
The hardware system of the anti-interference adaptive wireless communications platform of multi tate specifically includes that control unit 1, wireless transmission are single
Member 2 and 3 three parts of sensor unit composition.Control unit 1 is mainly made of on-site programmable gate array FPGA, is responsible for communication
The judgement and switching of mode and the realization of communication protocol；Wireless transmission unit 2 is by UHF wireless module 21, Wifi wireless module
22 and Zigbee wireless module 23 forms, and is responsible for the wirelessly transmitting data of platform；Sensor unit 3 is mainly by temperature and humidity sensing
Device 31, imaging sensor 32 and acceleration transducer 33 form, the environment and image information being responsible for around acquisition platform.
Scheduling and control centre of the control unit 1 as platform, wireless transmission unit 2 and sensor unit 3 are logical
It crosses electric interfaces to be connected with control unit 1, as peripheral hardware, completes fixed function.
The wireless transmission unit 2 is by UHF wireless module 21, Wifi wireless module 22 and Zigbee wireless module 23
Composition, three wireless modules pass through IC bus IIC, synchronous serial Peripheral Interface SPI, general-purpose serial bus USB, asynchronous
Serial interface RS232 is connected with the FPGA of control unit 1.
The sensor unit 3 is mainly by Temperature Humidity Sensor 31, imaging sensor 32 and acceleration transducer 33
Composition.After radio communication platform powers on, Temperature Humidity Sensor 31, imaging sensor 32 and acceleration transducer 33 are completed just
Beginningization waits FPGA to control signal.When control unit 1FPGA by IC bus IIC, synchronous serial Peripheral Interface SPI,
After general-purpose serial bus USB, asynchronous serial port interface RS232 communication interface send the order of request data, sensor reads corresponding
The data of the Temperature and Humidity module of acquisition, geographic coordinate information, are sent to the FPGA of control unit 1 by instruction by above-mentioned communication interface,
FPGA saves corresponding data in memory.
FPGA switching selection the Wireless Fidelity WiFi, tri- kinds of short-distance wireless communication Zigbee, superfrequency UHF channel radios
Then letter mode is drawn high the enable signal of wireless communication module, delivered a packet to by general Data Transport Protocol
Wireless transport module, wireless transport module in local memory, then send out received data pack buffer by Radio Link
It sees off, when data are sent, returned data end of transmission signal is to FPGA.The transmission of digital signal will be selected by FPGA
The data that the control instruction or sensor of transmitting obtain pass to above-mentioned three kinds of wireless transport modules, and then wireless module caches
Data are launched data by wireless channel by modulation.
The electric connecting relation of three parts is as shown in Figure 1.Control unit 1 is responsible for the task tune of entire radio communication platform
The function of degree, communication protocol realization, Data Analysis Services and communication mode switching.As shown in Fig. 2, entire wireless communication is flat
Platform enters dormant state after being powered on and initialized parameter.When thering is request of data to reach or the arrival of timed task time, automatically wake up,
Carry out the transmission of data task.Control unit 1 is before carrying out data wireless transmission, according to Fig. 3, selects the wireless communication optimized
Mode completes switching.
Control unit 1 of the present invention is responsible for the task schedule of entire radio communication platform, and communication protocol is realized, data
The step of function of analysis processing and communication mode switching, specific dispatching method are as follows:
Step 1: entire radio communication platform is powered on and initialized parameter or enters dormant state after setting up timed task；
Step 2: when having request of data to reach or the arrival of timed task time, the FPGA internal logic of control unit 1 is certainly
It is dynamic to wake up, carry out the transmission of data task；
Step 3: control unit 1 completes wireless sensor data acquisition tasks；
Step 4: control unit 1 is before carrying out wireless data transmission, advanced Mobile state decision, selects the channel radio optimized
Letter mode is completed to switch；
The specific judgment method that the dynamic decision and selection optimizes are as follows:
Step 4.1: the FPGA of control unit 1 is first analyzed and is calculated and the transmission range of adjacent communication node, communication distance
Parameter is calculated by obtaining the geographical coordinate of itself and communication node, active when external node sends data packet or instruction
The geographical coordinate of itself is carried, the information containing neighbors geographical coordinate received is stored in local by radio communication platform
In depositing, the neighbors refers to the node for there was only single-hop transmission distance apart from this node；
Step 4.2: when the transmission range of radio communication platform and neighbors is greater than 1km, control unit 1 selects UHF21
Communication, after UHF21 wireless communication module is enabled, Exit Decision-making deterministic process starts communication data transfer；
Step 4.3: when communication distance is within the distance of 100m~1000m, and there is no interference for the channel of 2.4Ghz
When, the radio frequency amplifier of Zigbee23 is opened, after enabling to select Zigbee23 communication, Exit Decision-making deterministic process,
Start communication data transfer；
Step 4.4: if there are biggish channel fading or artificial interference in 2.4Ghz frequency range, enabling selection
After the UHF21 communication of 433Mhz, Exit Decision-making deterministic process starts communication data transfer；
Step 4.5: if transmission range, within 100m, data transmission delay requirement is small, and data task amount is big, using
Wifi22 carries out data transmission, Exit Decision-making deterministic process, starts communication data transfer；
Step 4.6: if not requiring data delay, and channel disturbance is not serious, that is, using the radio band of 2.4Ghz
Transmit data, the received error rates of data of neighbors is low, can correctly reply handshaking information, using low-power consumption Zigbee23 without
Line number starts communication data transfer according to transmission, Exit Decision-making deterministic process；
Step 5: since wireless link environment variation is fast, stable row is poor, and there are data collisions and error code, it is therefore desirable to repeatedly
Handshaking information interaction, guarantees the correct transmission of data.
Control unit 1 selects after communication mode the transmission for carrying out data by decision optimization in step 4, furthermore communication protocols
It discusses and is directed to control command, the image data of short byte data and slab is respectively adopted different Handshake Protocols and carries out data friendship
Mutual: byte number is less than the data packet of 64bytes, using shaking hands twice；Image data greater than 64bytes carries out data point
It cuts, every 64bytes is packaged into a data frame, then using repeatedly shaking hands, continuously transmits data packet；
Step 6: control unit 1 is once again set up task timing, otherwise enters suspend mode shape after having carried out data transfer task
State.
Wherein Fig. 4 is that radio communication platform periodically sends the single of Hello (greeting) signal and shakes hands.Hello data
The network address information of radio communication platform, geographical location information, energy information are carried in packet.It is mainly wide to neighbors around
The state of oneself is broadcast, for establishing routing.Fig. 5 is that short byte data and order are shaken hands interactive process twice.Channel radio first
Believe that platform sends Hello signal to the neighbors of data to be received.After the Hello signal for receiving receiving node reply, determination is faced
Node is in state of answering, and sends the data packet of a frame, and waits the return signal of receiving node.When receiving node is in a timing
After the correct signal of interior reply received data packet, otherwise a data transfer ends of radio communication platform execute above-mentioned mistake
Cheng Jixu retransmits data.If data interaction is initial, the Hello information that radio communication platform is sent does not have whithin a period of time
It replys, then continues repeated attempt 2 times.If repeatedly attempting to come to nothing, communication mode decision process is returned to, again decision.
The image information of big data quantity is according to Fig. 6 using the mechanism repeatedly shaken hands.First by the data of slab according to fixed frame format
It is split, is packaged framing, and transmit frame by frame.After recipient receives data frame, under the premise of ensuring that data are correct continuous, return
Multiple confirmation signal.
It is a variety of wireless that one built with the anti-interference adaptive wireless communications platform of multi tate of the invention is shown in Fig. 7
The hybrid network of communication mode.Due to the working frequency range of tri- kinds of communication technologys of Wifi, Zigbee, UHF, coding mode, transmission association
The otherness of view leads to that data interaction and transmission can not be carried out between the node using three kinds of wireless communication protocols.For example it is mixing
In network using Wifi22 communication mode node 2 want to transmit data to be using the node 3 of Zigbee communication mode can not
It completes across frequency range, the transmission of cross-module formula.And bridge joint effect may be implemented in the communications platform for using various wireless communication mode,
It under the Analysis of Policy Making of control unit 1, is first switched under the communication pattern of wifi22, the interaction of data is realized with node 2.Then
It after obtaining initial data extracted valid data and analysis, then is switched under Zigbee23 communication pattern, data is sent.
Building for the data interaction and plurality of communication schemes hybrid network under different communication modes is realized in turn.
Claims (1)
1. a kind of anti-interference adaptive wireless communications platform of multi tate, it is characterised in that:
Including 3 three parts of control unit 1, wireless transport module 2 and sensor unit, control unit 1 can mainly be compiled by scene
Journey gate array FPGA composition, the judgement and switching and the realization of communication protocol of responsible communication pattern；Wireless transport module 2 by
UHF wireless transport module 21, Wifi wireless transport module 22 and Zigbee wireless transport module 23 form, and are responsible for the nothing of platform
Line transmits data；Sensor unit 3 is mainly by Temperature Humidity Sensor 31, imaging sensor 32 and 33 groups of acceleration transducer
At the environment and image information being responsible for around acquisition platform；
Scheduling and control centre of the control unit 1 as platform, wireless transport module 2 and sensor unit 3 pass through electricity
Gas interface is connected with control unit 1, as peripheral hardware, completes fixed function；
The wireless transport module 2 is wirelessly passed by UHF wireless transport module 21, Wifi wireless transport module 22 and Zigbee
Defeated module 23 forms, and three wireless modules pass through IC bus IIC, synchronous serial Peripheral Interface SPI, universal serial bus
USB, asynchronous serial port interface RS232 are connected with the FPGA of control unit 1；
The sensor unit 3 is mainly by by Temperature Humidity Sensor 31, imaging sensor 32 and 33 groups of acceleration transducer
At；After radio communication platform powers on, Temperature Humidity Sensor 31, imaging sensor 32 and acceleration transducer 33 are completed initially
Change, FPGA is waited to control signal；When control unit 1FPGA passes through IC bus IIC, synchronous serial Peripheral Interface SPI, logical
After the order for sending request data with serial bus USB, asynchronous serial port interface RS232 communication interface, sensor, which is read, accordingly to be referred to
It enables, the data of the Temperature and Humidity module of acquisition, geographic coordinate information is sent to the FPGA, FPGA of control unit 1 by above-mentioned communication interface
Corresponding data are saved in memory；
FPGA switching selection the Wireless Fidelity WiFi, tri- kinds of short-distance wireless communication Zigbee, superfrequency UHF side wireless communications
Then formula is drawn high the enable signal of wireless transport module, delivered a packet to wirelessly by general Data Transport Protocol
Transmission module, wireless transport module in local memory, then send out received data pack buffer by Radio Link
It goes, when data are sent, returned data end of transmission signal is to FPGA；The transmission of digital signal is to be emitted selection by FPGA
Control instruction or sensor obtain data pass to above-mentioned three kinds of wireless transport modules, then wireless transport module cache
Data are launched data by wireless channel by modulation；The control unit of radio communication platform selects field-programmable
Gate array FPGA realizes adaptive switching communication mode algorithm；Digital Logic in fpga chip mainly passes through acquisition applications item
Part, data delay requirement, wireless channel disturbed condition and platform energy information, dynamic analysis judgement are final to realize three kinds
The switching of communication；
The switching of three kinds of communications includes the following steps:
Step 1: entire radio communication platform is powered on and initialized parameter or enters dormant state after setting up timed task；
Step 2: when having request of data arrival or timed task time to reach, the FPGA internal logic of control unit 1 is called out automatically
It wakes up, carries out the transmission of data task；
Step 3: control unit 1 completes wireless sensor data acquisition tasks；
Step 4: control unit 1 is before carrying out wireless data transmission, advanced Mobile state decision, selects the side wireless communication optimized
Formula completes switching；
The specific judgment method that the dynamic decision and selection optimizes are as follows:
Step 4.1: the FPGA of control unit 1 is first analyzed and is calculated and the transmission range of adjacent communication node, communication distance parameter
Geographical coordinate by obtaining itself and communication node is calculated, and external node actively carries when sending data packet or instruction
The information containing neighbors geographical coordinate received is stored in local memory by the geographical coordinate of itself, radio communication platform
In, the neighbors refers to the node for there was only single-hop transmission distance apart from this node；
Step 4.2: when the transmission range of radio communication platform and neighbors is greater than 1km, control unit 1 selects UHF21 wireless
Communication mode, after UHF21 wireless transport module is enabled, Exit Decision-making deterministic process starts communication data transfer；
Step 4.3: when communication distance is within the distance of 100m~1000m, and there is no interference for the channel of 2.4Ghz frequency range
When, the radio frequency amplifier of Zigbee23 is opened, after enabling to select Zigbee23 communication, Exit Decision-making deterministic process,
Start communication data transfer；
If there are biggish channel fading or artificial interference in 2.4Ghz frequency range, enable the UHF21 of selection 433Mhz without
After line communication mode, Exit Decision-making deterministic process starts communication data transfer；
Step 4.4: if transmission range, within 100m, data transmission delay requirement is small, and data task amount is big, using Wifi22
Carry out data transmission, Exit Decision-making deterministic process, starts communication data transfer；
If not requiring data delay, and channel disturbance is not serious, i.e., data are transmitted using the radio band of 2.4Ghz frequency range,
The received error rates of data of neighbors is low, can correctly reply handshaking information, is passed using the Zigbee23 wireless data of low-power consumption
Defeated, Exit Decision-making deterministic process starts communication data transfer；
Step 5: control unit 1 selects after communication mode the transmission for carrying out data by decision optimization in step 4, furthermore communicates
Agreement is directed to control command, and the image data of short byte data and slab is respectively adopted different Handshake Protocols and carries out data friendship
Mutual: byte number is less than the data packet of 64bytes, using shaking hands twice；Image data greater than 64bytes carries out data point
It cuts, every 64bytes is packaged into a data frame, then using repeatedly shaking hands, continuously transmits data packet；
Step 6: control unit 1 is once again set up task timing, otherwise enters dormant state after having carried out data transfer task；
The control unit of radio communication platform selects on-site programmable gate array FPGA to realize that adaptive switching is logical in above-mentioned steps
Letter mode algorithm；Digital Logic in fpga chip mainly passes through acquisition applications condition, data delay requirement, wireless channel interference
Situation and platform energy information, dynamic analysis judgement, finally realize the switching of three kinds of communications.
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