CN104735715B - Wireless Multi-Channel communication device and multi channel real-time communication method - Google Patents
Wireless Multi-Channel communication device and multi channel real-time communication method Download PDFInfo
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- CN104735715B CN104735715B CN201510075436.1A CN201510075436A CN104735715B CN 104735715 B CN104735715 B CN 104735715B CN 201510075436 A CN201510075436 A CN 201510075436A CN 104735715 B CN104735715 B CN 104735715B
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- 238000004891 communication Methods 0.000 title claims abstract description 84
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000005540 biological transmission Effects 0.000 claims abstract description 75
- 238000012545 processing Methods 0.000 claims description 31
- 238000005070 sampling Methods 0.000 abstract description 4
- 230000004069 differentiation Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
- H04W74/0841—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure with collision treatment
- H04W74/085—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure with collision treatment collision avoidance
Abstract
The invention discloses a kind of Wireless Multi-Channel communication devices and multi channel real-time communication method, device to include：Receiving unit, for receiving data on the wireless channel of setting；Transmission unit, for the transmission data on specified wireless channel；Central co-ordination handles unit, it is electrically connected respectively with multiple receiving units and transmission unit, the data received for obtaining multiple receiving units in real time, when needing to emit data, the idle wireless channel that transmission unit uses is specified according to the state of current each wireless channel, and the data sent will be needed to be transferred to transmission unit on idle wireless channel herein.The device of the invention and method, multiple channel conditions can be monitored simultaneously, according to effective receive accurate channel busy differentiation threshold value is obtained with continuous sampling, and it can judge whether to generate collision or distortion by receiving the data packet of own transmission, with high real-time, the communication delay caused by channel confliction can be avoided.
Description
Technical field
The present invention relates to wireless communication technology fields, particularly relate to a kind of Wireless Multi-Channel communication device and multi channel reality
When communication means.
Background technology
Currently, most of the communication equipment in cordless communication network is that the transmitting-receiving of data is carried out for single channel, and nothing
There are the race problems of the channel right to use between each communication node in line communication network, i.e. the transceiver in the same band operation,
When sending wireless signal simultaneously if there is two or more, communication can be caused to be destroyed because of interfering for signal.
There are many channel competition agreements to solve the problems, such as this, but essence is all that the node progress of wireless signal is needed while sent by ordered pair
It successively organizes, the communication delay of certain nodes can be caused.In the occasion for needing real-time wireless communication, this delay can not be endured,
Such as between the automobile travelled on a highway, communicated by onboard wireless system, needs to carry out by wireless signal
The interaction of running information, to provide more safety guarantee for driver, hundreds of caused by wireless communication conflict in this case
Millisecond delay is likely to cause the accident between vehicle to occur.A kind of guarantee transceiver is needed at any time can thus
The mechanism of transmission data, this mechanism can realize that timely communication when wireless terminal emergency situation occurs, satisfaction have height well
The radio network product demand of requirement of real time.
Invention content
In view of this, it is an object of the invention to propose a kind of Wireless Multi-Channel communication device and multi channel real-time Communication for Power
Method while listening for multiple channel conditions and can select channel transmission data.
A kind of Wireless Multi-Channel communication device is provided based on the above-mentioned purpose present invention, including：Receiving unit, for setting
Wireless channel on receive data；Transmission unit, for the transmission data on specified wireless channel；Central co-ordination processing is single
Member is electrically connected with multiple receiving units and the transmission unit respectively, is connect for obtaining multiple receiving units in real time
The data of receipts specify the free time that the transmission unit uses when needing to emit data according to the state of currently each wireless channel
Wireless channel, and the data sent will be needed to be transferred to the transmission unit on idle wireless channel herein.
According to one embodiment of present invention, further, in Central co-ordination processing unit and each receiving unit
Between address selection unit is all set；Described address selecting unit passes through address bus and data/address bus and the Central Co-ordinating Office
Unit connection is managed, described address selecting unit is connected by data/address bus with corresponding receiving unit；Wherein, the receiving unit
Unify layout by address, is mutually distinguished by address number；The Central co-ordination processing unit passes through serial communication bus and the hair
Unit is sent to connect.
According to one embodiment of present invention, further, the wireless channel set by multiple receiving units is not
Identical, each receiving unit monitors corresponding wireless channel, obtains the received signal strength indicator of wireless channel in real time
RSSI value, and it is sent to data port；The Central co-ordination processing unit cycle gates the receiving unit, passes through data/address bus
Obtain the RSSI value.
According to one embodiment of present invention, further, each receiving unit by independent condition line with
The Central co-ordination processing unit connection；Upon reception of the data packet, the receiving unit obtains the RSSI of current radio channel
Value, and unit is handled to the Central co-ordination by the condition line and sends trigger signal, by the data packet and described current
The RSSI value of wireless channel is sent to data port；Wherein, the trigger signal includes：Low level signal；When the center association
Adjust processing unit when receiving the trigger signal, determine the corresponding receiving unit of the trigger signal, by data/address bus from
This receiving unit obtains the RSSI value of the data packet and the current radio channel.
According to one embodiment of present invention, further, the Central co-ordination handles RSSI value of the unit according to acquisition
Judge wireless channel whether in idle or busy condition；When sending out data, the Central co-ordination processing unit selection is idle
Wireless channel and set transmission unit work idle wireless channel herein, it would be desirable to the data of transmission pass through serial
Transmission gives the transmission unit.
According to one embodiment of present invention, further, the letter of the free time is passed through by the transmission unit in data
After road is sent, the receiving unit for being operated in wireless channel identical with the channel of free time receives this number sent
According to；The data sent that receiving unit receives described in Central co-ordination processing unit judges whether with originally transmitted number
According to identical, if it is, judging transmission data success.
A kind of multi channel real-time communication method, including：Multiple receiving units receive data on the wireless channel of setting,
The data that multiple receiving units receive are obtained in real time；When needing to emit data, the state according to current each wireless channel is specified
The idle wireless channel that transmission unit uses, and it is single by needing the data sent to be transferred to transmission on idle wireless channel herein
Member；Transmission unit transmission data on specified wireless channel.
According to one embodiment of present invention, further, the receiving unit unifies layout by address, passes through address number
Mutually distinguish；Wireless channel set by multiple receiving units is different from, and each receiving unit is monitored corresponding
Wireless channel, obtains the received signal strength indicator RSSI value of wireless channel in real time, and is sent to data port；Cycle gating
The receiving unit obtains the RSSI value by data/address bus.
According to one embodiment of present invention, further, upon reception of the data packet, the receiving unit obtains current
The RSSI value of wireless channel, and trigger signal is sent by condition line, by the data packet and the current radio channel
RSSI value is sent to data port；Wherein, the trigger signal includes：Low level signal；When receiving the trigger signal,
It determines the corresponding receiving unit of the trigger signal, the data packet is obtained from this receiving unit by data/address bus and described works as
The RSSI values of preceding wireless channel.
According to one embodiment of present invention, further, judge whether wireless channel is according to the RSSI value of acquisition
Idle or busy condition；When sending out data, it chooses idle wireless channel and sets the transmission unit and work the free time herein
Wireless channel, it would be desirable to the data of transmission are transferred to the transmission unit by serial communication bus；In data by the hair
After sending unit to be sent by the channel of the free time, it is operated in the reception of wireless channel identical with the channel of free time
Unit receives this data sent；What what receiving unit received described in Central co-ordination processing unit judges sent
Whether data are identical as originally transmitted data, if it is, judging transmission data success.
From the above it can be seen that the Wireless Multi-Channel communication device and multi channel real-time communication method of the present invention,
Multiple receiving units can receive the data on different radio channel simultaneously, and when sending data real-time selection suitable channel into
Reliable wireless communication is realized in the transmission of row data.Multiple channel conditions can be monitored simultaneously, adopted according to effective reception and continuously
Sample obtains accurate channel busy and distinguishes threshold value, and can judge whether by receiving the data packet of own transmission to generate collision or
Distortion has high real-time, can avoid the communication delay caused by channel confliction.
Description of the drawings
Fig. 1 is the schematic diagram of one embodiment of the Wireless Multi-Channel communication device of the present invention；
Fig. 2 is the schematic diagram of another embodiment of the Wireless Multi-Channel communication device of the present invention；
Fig. 3 is by the schematic diagram of the Wireless Multi-Channel communication device network consisting of the present invention；
Fig. 4 is the flow chart of one embodiment of the multi channel real-time communication method of the present invention.
Fig. 5 is the work flow diagram of the reception data of one embodiment of the multi channel real-time communication method of the present invention；
Fig. 6 is the work handled receiving data of one embodiment of the multi channel real-time communication method of the present invention
Make flow chart；
Fig. 7 is the workflow of the inspection transmission data of one embodiment of the multi channel real-time communication method of the present invention
Figure.
Specific implementation mode
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, and reference
Attached drawing, the present invention is described in more detail.
Fig. 1 is the schematic diagram of one embodiment of the Wireless Multi-Channel communication device of the present invention, as shown in Figure 1, receiving single
Member 12,13,14 receives data on the wireless channel of setting.The transmission data on specified wireless channel of transmission unit 15.In
Centre Coordination Treatment unit 11 is electrically connected with multiple receiving units 12,13,14 and transmission unit 15 respectively, obtains multiple connect in real time
The data for receiving the reception of unit 12,13,14 send list when needing to emit data according to the state of current each wireless channel is specified
The idle wireless channel that member 15 uses, and the data sent will be needed to be transferred to transmission unit on idle wireless channel herein.
The Wireless Multi-Channel communication device of the present invention, multiple receiving units can receive the number on different radio channel simultaneously
According to, and real-time selection suitable channel carries out the transmission of data when sending data, realizes reliable wireless communication in real time.Channel has
There are certain frequency bandwidth, multiple wireless channels that can be divided by the wireless frequency of work, alternatively, different reception lists
Different agreements, such as wifi, bluetooth, CDMA etc. may be used in member.
Fig. 2 is the schematic diagram of another embodiment of the Wireless Multi-Channel communication device of the present invention, as shown in Fig. 2, in
It is configured between centre Coordination Treatment unit (or Central co-ordination processing device) 21 and 1,2 ... n of each receiving unit (or receiver)
Location selecting unit 1,2 ... n.Address selection unit 1,2 ... n handle unit 21 by address bus and data/address bus and Central co-ordination
Connection, address selection unit 1,2 ... n pass through data/address bus and corresponding receiving unit 1,2 ... n connections.Receiving unit 1,2 ... n
Unify layout by address, is mutually distinguished by address number.Central co-ordination processing unit 21 passes through serial communication bus and transmitter unit
(or transmitter) 23 connects.
Multiple receiving units 1,2 ... n can be operated in different communication channels, unify layout by address, all pass through address
Bus, data/address bus and condition line are connect with Central co-ordination processing unit 21.Central co-ordination processing unit 21 passes through receiving unit
1,2 ... n detect the state of each channel, and then control transmitter unit 23 and work in designated channel and carry out real-time reliable communication.
Wireless channel set by multiple receiving units 1,2 ... n is different from, and each receiving unit monitors corresponding nothing
Line channel, obtains the received signal strength indicator RSSI value of wireless channel in real time, and is sent to data port.Central co-ordination processing
Unit cycle gating receiving unit, RSSI values are obtained by data/address bus.
In one embodiment, receiving unit 1 is made of microprocessor and wireless communication unit circuit, and microprocessor has
Two data port, one for store the Content of Communication received, the signal strength numerical value for channel residing for storing,
Two data port all have data buffer storage ability, and are connected with the data/address bus of Central co-ordination processing machine.
Each receiving unit 1,2 ... n handle unit 21 with Central co-ordination by independent condition line and connect.When receiving
When data packet, receiving unit obtains the RSSI value of current radio channel, and handles unit to Central co-ordination by condition line and send
The RSSI value of data packet and current radio channel is sent to data port by trigger signal.Trigger signal includes：Low level signal
Deng.When central Coordination Treatment unit 21 receives trigger signal, the corresponding receiving unit of trigger signal is determined, it is total by data
Line obtains the RSSI value of data packet and current radio channel from this receiving unit.
In one embodiment, Central co-ordination processing unit 21 detects each channel status by receiving unit 1,2 ... n, is
It is actively initiated by receiving unit 1,2 ... n.The microprocessor of each receiving unit is obtained all the time by wireless communication unit circuit
The signal strength values of channel where obtaining, and it is placed on signal strength data port, while judging whether to receive wireless data, if receiving
It then informs that Central co-ordination handles unit 21 by way of changing status signal lines level, unit 21 is then handled by Central co-ordination
The receiving unit is gated, Content of Communication and channel strength are obtained.
The working channel real-time change of transmitter unit 23, by Central co-ordination processing unit 21 according to the sky of current all channels
Not busy and busy condition carrys out selection.Central co-ordination is handled there are two the signal strengths that unit 21 is acquired for each communication control processor
Sample data, one group of sample store the signal strength when channel does not have communication event (receiving data) generation, one group of sample
Store signal strength when communication event (receiving data) occurs.Central co-ordination handles unit 21 according to two in certain time
Group sample values constantly update the busy or idle signal strength of channel and divide threshold value.
The Wireless Multi-Channel communication device of the present invention, can monitor multiple channel conditions simultaneously, and there is parallel communications to handle energy
Power obtains accurate channel busy differentiation threshold value with continuous sampling according to effective receive, and can determine whether letter by own receiver
Road conflict situations have high real-time.
In one embodiment, when sending out data, Central co-ordination processing unit 21 is chosen idle wireless channel and is set
Determine the work of transmitter unit 23 idle wireless channel herein, it would be desirable to which the data of transmission are transferred to transmitting by serial communication bus
Unit 23.
After data are launched unit 23 by idle channel transmission, it is operated in wireless communication identical with idle channel
The receiving unit 1 in road receives this data sent.Central co-ordination processing unit 21 judges that receiving unit 1 received is sent out
Whether the data sent are identical as originally transmitted data, if it is, judging transmission data success.
Can the communication reliability of the Wireless Multi-Channel communication device of the present invention, be that receive device itself by receiving unit
The data packet of transmitting judges.The wireless signal sent out by transmitter unit, if being in the reception list of same working channel
Member receives, and data content and transmitting content are completely the same, then illustrates that emission process inerrancy generates, and data communicate successfully,
Otherwise it is assumed that channel generates collision or distorted signals, need to retransmit.
The Wireless Multi-Channel communication device of the present invention, can determine whether the data packet of own transmission generates collision or distortion,
Support that greater number of wireless terminal works at the same time in same wireless network, it is big particularly suitable for Data Concurrent amount between automobile and
Extra high occasion is required to real-time communication.
If Fig. 3 is the vehicular wireless network being made of the Wireless Multi-Channel communication device of the present invention, Wireless Multi-Channel communication
Device 31,32 is separately positioned on different automobiles.It can be carried out at the same time letter on other wireless channels between device in system
Breath transmit, realize in same radio coverage, communicated while between any two communication node, concurrent working and mutually solely
It is vertical.
In one embodiment, Wireless Multi-Channel communication device of the invention is with Central co-ordination processing unit 21, several
A identical communication control processor 22, several address selection units 29 and a wireless communication transmitter unit 23, each receiving unit
22 are operated on different wireless channels.
Each receiving unit 22 independently handles unit 21 with Central co-ordination by condition line 26 and is connected to, and condition line is single by receiving
Member 22 controls, and is usually high level.Each receiving unit 22 carries out the initialization of equipment after powering on, according to itself program setting work
Make in respective radio channels, is in reception state, the numerical value of the received signal strength RSSI of real-time sampling present channel and placement
It onto data/address bus 24, while judging whether there is complete data packet and arriving, when receiving unit 22 receives other same types
When the partial data signal that the respective radio channels of Wireless Multi-Channel communication device are sent, 26 level of condition line is dragged down.
Central co-ordination handles the cycle of unit 21 and gates each road communication control processor, and obtains and sensed in real time on each receiving unit
Wireless channel on signal strength values.Meanwhile the low level occurred on condition line 26 can trigger Central co-ordination processing unit 21
Into interrupt status, after Central co-ordination processing device 21 enters the interruption caused by this kind of situation, it can judge which road receiving unit draws
The interruption risen, and the signal strength values of the complete data-signal and current radio channel that are received on receiving unit are read, make
One of the foundation of channel busy is judged for next time.
When needing to emit data, Central co-ordination handles unit 21 by judging the busy situation of current time each channel,
An idle channel is selected, setting transmitter unit 23 is operated in the idle channel, and the content sent will be needed to pass through serial communication
Bus transfer is sent immediately to transmitter unit 23.The receiving unit n30 of data battery has fired, corresponding launch channel receives transmitting
The data content that unit 23 has been sent, and cause the low level of condition line 26, triggering is interrupted, and is sentenced by Central co-ordination processing unit 21
It is disconnected whether successful launch.
Fig. 4 is the flow chart of one embodiment of the multi channel real-time communication method of the present invention.As shown in Fig. 4：
Step 301, multiple receiving units receive data on the wireless channel of setting.
Step 302, the data that multiple receiving units receive are obtained in real time；When needing to emit data, according to current each nothing
The state of line channel specifies the idle wireless channel that transmission unit uses, and will need the number sent on idle wireless channel herein
According to being transferred to transmission unit.
Step 303, transmission unit transmission data on specified wireless channel.
Receiving unit unifies layout by address, is mutually distinguished by address number.Wireless channel set by multiple receiving units
It is different from, each receiving unit monitors corresponding wireless channel, obtains the received signal strength indicator of wireless channel in real time
RSSI value, and it is sent to data port；Cycle gating receiving unit, RSSI value is obtained by data/address bus.
Fig. 5 is the work flow diagram of the reception data of one embodiment of the multi channel real-time communication method of the present invention；
As shown in Figure 5：
Step 401, the radio communication circuit that receiving unit is arranged is reception device.
Step 402, the received signal strength indicator RSSI value of wireless channel is obtained in real time, and is sent to data port.
Step 403, judge whether to receive data packet, if yes then enter step 404, if not, return to step 402.
Step 404, setting condition line numerical value is M.
Step 405, upon reception of the data packet, receiving unit obtains the RSSI value of current radio channel, and passes through state
Line sends trigger signal, and the RSSI value of the M byte of data packet and current radio channel is sent to data port；Trigger signal packet
It includes：Low level signal etc..
Step 406,407,408, by the data packet end of transmission of reception.
When receiving trigger signal, the corresponding receiving unit of trigger signal is determined, it is single from this reception by data/address bus
Member obtains the RSSI value of data packet and current radio channel.
Fig. 6 is the work handled receiving data of one embodiment of the multi channel real-time communication method of the present invention
Make flow chart, as shown in Figure 6：
Step 501, the low level occurred on condition line can be triggered into 1 state of interrupting.
Step 502, into after the interruption caused by this kind of situation, judging interrupted caused by any road receiving unit.
Step 503,504,505 gate the receiver；Reading state bus and data/address bus, receive from receiving unit
The signal strength values of the complete data-signal and current radio channel that arrive and storage, as judge next time channel busy foundation it
One.
Step 506, the RSSI threshold values of wireless channel are updated.
Fig. 7 is the workflow of the inspection transmission data of one embodiment of the multi channel real-time communication method of the present invention
Figure；As shown in Figure 7：
Step 601, it needs to carry out transmission data, into interrupting 2 states.
Step 602,603, judge wireless channel whether in idle or busy condition according to the RSSI value of acquisition；Work as transmission
When data, chooses idle wireless channel and set transmission unit work idle wireless channel herein, it would be desirable to the number of transmission
It is transferred to transmission unit according to by serial communication bus.
Step 604, transmission data.
Step 605, it after data are sent by transmission unit by idle channel, is operated in identical with idle channel
The receiving unit of wireless channel receives this data sent.The quilt that Central co-ordination processing unit judges receiving unit receives
Whether the data of transmission are identical as originally transmitted data, if it is, judging transmission data success.
The Wireless Multi-Channel communication device and multi channel real-time communication method that above-described embodiment provides, multiple receiving units
The data on different radio channel can be received simultaneously, and real-time selection suitable channel carries out the hair of data when sending data
It send, realizes reliable wireless communication.Multiple channel conditions can be monitored simultaneously, obtained accurately with continuous sampling according to effective receive
Channel busy distinguishes threshold value, and can judge whether to generate collision or distortion have pole by receiving the data packet of own transmission
High real-time can avoid the communication delay caused by channel confliction.
Those of ordinary skills in the art should understand that：The above is only a specific embodiment of the present invention, and
It is not used in the limitation present invention, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done,
It should be included within protection scope of the present invention.
Claims (9)
1. a kind of Wireless Multi-Channel communication device, which is characterized in that including：
Receiving unit, for receiving data on the wireless channel of setting；
Transmission unit, for the transmission data on specified wireless channel；
Central co-ordination handles unit, is electrically connected respectively with multiple receiving units and the transmission unit, for obtaining in real time
The data that multiple receiving units receive, it is specified described according to the state of current each wireless channel when needing to emit data
The idle wireless channel that transmission unit uses, and the data sent will be needed to be transferred to the transmission on idle wireless channel herein
Unit；
Wherein, when sending out data, the Central co-ordination handles the wireless channel of unit selection free time and sets the transmission list
First wireless channel idle herein that works, it would be desirable to which the data of transmission are transferred to the transmission unit by serial communication bus；
After data are sent by the transmission unit by the channel of the free time, it is operated in identical with the channel of free time wireless
The receiving unit of channel receives this data sent；Receiving unit connects described in the Central co-ordination processing unit judges
Whether the data sent received are identical as originally transmitted data, if it is, judging transmission data success.
2. device as described in claim 1, it is characterised in that：
It is handled in the Central co-ordination and address selection unit is set between unit and each receiving unit；
Described address selecting unit handles unit with the Central co-ordination by address bus and data/address bus and connect, described address
Selecting unit is connected by data/address bus with corresponding receiving unit；Wherein, the receiving unit unifies layout by address, passes through
Address number is mutually distinguished；
The Central co-ordination processing unit is connect by serial communication bus with the transmission unit.
3. device as claimed in claim 1 or 2, it is characterised in that：
Multiple receiving units are all operated in different wireless channels, and each receiving unit monitors corresponding wireless communication
Road, obtains the received signal strength indicator RSSI value of wireless channel in real time, and is sent to data port；
The Central co-ordination processing unit cycle gates the receiving unit, and the RSSI value is obtained by data/address bus.
4. device as claimed in claim 3, it is characterised in that：
Each receiving unit handles unit with the Central co-ordination by independent condition line and connect；
Upon reception of the data packet, the receiving unit obtains the RSSI value of current radio channel, and by the condition line to
The Central co-ordination processing unit sends trigger signal, and the RSSI value of the data packet and the current radio channel is sent to
Data port；Wherein, the trigger signal includes：Low level signal；
When Central co-ordination processing unit receives the trigger signal, determine that the corresponding reception of the trigger signal is single
Member obtains the RSSI value of the data packet and the current radio channel by data/address bus from this receiving unit.
5. device as claimed in claim 4, it is characterised in that：
Whether the Central co-ordination processing unit judges wireless channel in idle or busy condition according to the RSSI value of acquisition.
6. a kind of multi channel real-time communication method, which is characterized in that including：
Multiple receiving units receive data on the wireless channel of setting；
The data that multiple receiving units receive are obtained in real time；When needing to emit data, according to the state of current each wireless channel
The idle wireless channel that specified transmission unit uses, and the data sent will be needed to be transferred to transmission on idle wireless channel herein
Unit；
Transmission unit transmission data on specified wireless channel；
Wherein, when sending out data, it chooses idle wireless channel and to set the transmission unit work idle wireless herein
Channel, it would be desirable to which the data of transmission are transferred to the transmission unit by serial communication bus；
After data are sent by the transmission unit by the channel of the free time, it is operated in identical with the channel of free time
The receiving unit of wireless channel receives this data sent；
The data sent that receive of receiving unit described in Central co-ordination processing unit judges whether with originally transmitted data
It is identical, if it is, judging transmission data success.
7. method as claimed in claim 6, it is characterised in that：
The receiving unit unifies layout by address, is mutually distinguished by address number；
Multiple receiving units are all operated in different wireless channels, and each receiving unit monitors corresponding wireless communication
Road, obtains the received signal strength indicator RSSI value of wireless channel in real time, and is sent to data port；
Cycle gates the receiving unit, and the RSSI value is obtained by data/address bus.
8. the method for claim 7, it is characterised in that：
Upon reception of the data packet, the receiving unit obtains the RSSI value of current radio channel, and is sent and touched by condition line
It signals, the RSSI value of the data packet and the current radio channel is sent to data port；Wherein, the trigger signal
Including：Low level signal；
When receiving the trigger signal, the corresponding receiving unit of the trigger signal is determined, connect from this by data/address bus
Receive the RSSI value that unit obtains the data packet and the current radio channel.
9. method as claimed in claim 8, it is characterised in that：
Judge wireless channel whether in idle or busy condition according to the RSSI value of acquisition.
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| CN106391481B (en) * | 2016-08-31 | 2019-07-12 | 上海万琛电子商务有限公司 | A kind of detection collision method |
| CN111653078B (en) * | 2020-05-28 | 2024-02-06 | 北京萨达智能技术有限公司 | Tower crane anti-collision data receiving and transmitting device and method based on wireless data transmission |
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| US9257744B2 (en) * | 2012-05-21 | 2016-02-09 | Qualcomm Incorporated | Devices, systems, and methods for adjusting probing distances |
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