CN104361733B - A kind of method based on the dynamic authentication wireless remote control for intersecting coding - Google Patents
A kind of method based on the dynamic authentication wireless remote control for intersecting coding Download PDFInfo
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Abstract
The invention discloses a kind of based on the dynamic authentication wireless remote control method for intersecting coding, utilize control identifying code of two kinds of coding methods to this dynamic generation, last control identifying code, controlling instruction code is separately encoded, upload to remotely-controlled equipment, remotely-controlled equipment is decoded to two kinds of coding methods respectively, obtain the control identifying code of this dynamic generation, last control identifying code, controlling instruction code, after verifying that last control identifying code is effective, execute instruction, two kinds of coding methods are recycled to intersect the control identifying code of this dynamic generation, last control identifying code, controlling instruction code is encoded respectively, return to remote control equipment, remote control equipment is decoded to two kinds of coding methods respectively, obtain the control identifying code of this dynamic generation, controlling instruction code is separately encoded, confirm that identifying code and instruction send and performed correct.Present invention reduces the possibility that is performed is instructed by mistake, prevent instruction by mistake and illegal instruction from producing influence to controlled system.
Description
Technical field
It is particularly a kind of based on the dynamic authentication wireless remote for intersecting coding the present invention relates to wireless remote control applied technical field
The method of control.
Background technology
Remote-control romote-sensing, i.e., in some way form control instruction the signal for being easy to transmit, by wirelessly passing in control end
It is defeated, form corresponding control operation through processing in controlled end；Meanwhile, the status information of controlled end is transferred to control through same process
End processed, realizes the monitoring process to controlled end.
Telemetering and remote control system can be divided into wire-link telemetry remote control system and wireless telemetering remote control according to the difference of transmission medium
System.Wire-link telemetry remote control system is general to transmit data by common communications line, dedicated communication line cable medium.Wireless remote
Survey remote control system and carrier transmission data are used as by electromagnetic wave or light.Wireless telemetering remote control system along with aeronautical and space technology with
The development of national economy is developed rapidly.At present, wireless telemetering remote control is developed rapidly in civil area, extensively should
For regimen hydrologic monitoring, environment monitoring, seismic monitoring network, street lamp remote control, automatic data logging, household electrical appliance control etc. certainly
Dynamicization control field.
With the extensive use of wireless remote control, enter by shared wireless network and the local radio network without encipherment protection
The application of row remote measuring and controlling is increasing, in the transmitting procedure of control information, the possibility that existence information is trapped, distorted.
The content of the invention
(1) technical problem to be solved
In view of this, the main object of the present invention is to disclose a kind of dynamic authentication wireless remote prosecutor based on intersection coding
Method, using based on intersect coding dynamic authentication wireless remote control method, by dynamic change identifying code and, identifying code with control
Instruction carries out intersection coding during being passed under upload and confirmation using double coding algorithm, under reduction control instruction is uploaded and confirmed
During biography, due to the possibility for being wirelessly transferred and being trapped, reduction instructs the possibility being performed by mistake, prevents instruction by mistake and non-
Method instruction produces influence to controlled system.
(2) technical scheme
To reach above-mentioned purpose, the invention provides a kind of method based on the dynamic authentication wireless remote control for intersecting coding,
Including：
Step 1：It is utilized respectively the first coding method F1With the second coding method F2To the control identifying code of this dynamic generation
VC, last control identifying code VLAnd controlling instruction code C is encoded, the first encoding control information I is obtained1With the second coding
Control information I2, wherein I1=F1(VC, C), I2=F2(VL, C)；
Step 2：First encoding control information I1With the second encoding control information I2Sent by remote control equipment, pass through radio chains
Road is uploaded, and remotely-controlled equipment is received；
Step 3：Remotely-controlled equipment judges the first encoding control information I received1With the second encoding control information I2Whether with
The encoding control information that last time receives is identical, if identical, and the biography coding information down of remotely-controlled equipment passback last time is set to remote control
It is standby, then perform step 5；If it is different, remotely-controlled equipment is decoded to encoding control information, the control of this dynamic generation is obtained
Identifying code processed, last control identifying code and controlling instruction code；
Step 4：Whether the last control identifying code of remotely-controlled equipment checking is effective, verifies decoded controlling instruction code
C1And C2It is whether identical；
Step 5：Remote control equipment receives the back information of remotely-controlled equipment, judges whether passback command reception is overtime, if super
The back information that the predetermined time do not receive remote control equipment is crossed, then judges that passback control instruction receives time-out, reports that this is passed
Defeated failure, this controlling transmission terminates；Had not timed out if passback control instruction is received, perform step 6；
Step 6：Remote control equipment interprets back information, judges back information type；
If back information is invalid information IN, then remote control equipment report transmission fault, remote control equipment this instruction transmission fault
Count is incremented for base, if remote control equipment this instruction transmission fault base, which is counted, exceeds predetermined value, report controlling transmission failure, this secondary control
The end of transmission processed, if without departing from again by Radio Link, to the first encoding control information I of remotely-controlled equipment transmission1With
Two encoding control information I2；
If back information passes coding information under,：
I) it is utilized respectively the coding/decoding method F corresponding to two kinds of coding methods1 -1And F2 -1, under passing coding information solves
Code：(VC', C1)=F2 -1(I1’)、(VL', C2)=F1 -1(I2'), obtain the control identifying code, last of this dynamic generation
Control identifying code and controlling instruction code；
Ii V) is checkedC' whether with the V that is sent before remote control equipmentCIt is identical, check VL' whether with being sent before remote control equipment
VLIt is identical, C1、C2It is whether identical with the C sent before remote control equipment,
(1) if identical, this secondary control is completed, and is terminated；
(2) if it is different, then waiting controlled device to send back information again, while sending this encoding control information I repeatedly1
And I2；As the encoding control information I sent to remotely-controlled equipment1And I2More than pre-determined number NUPWhen, the event of remote control equipment report link
Barrier, and this encoding control information I is sent repeatedly1And I2；
Step 7：Remotely-controlled equipment sends back information always, until remote control equipment sends next effective information；If
Remotely-controlled equipment is sent after back information, is received again by this encoding control information I1And I2, then can determine that down that the link passed is asked
Topic, remote control equipment does not receive this back information always, and remotely-controlled equipment sends back information always, until remote control equipment is sent
Next effective information.
(3) beneficial effect
The method based on the dynamic authentication wireless remote control for intersecting coding that the present invention is provided, using two kinds of coding methods to this
The control identifying code of secondary dynamic generation, last control identifying code, controlling instruction code are separately encoded, and are uploaded to be remotely-controlled and are set
Standby, remotely-controlled equipment is decoded to two kinds of coding methods respectively, obtains the control identifying code, last of this dynamic generation
Identifying code, controlling instruction code are controlled, after verifying that last control identifying code is effective, execute instruction recycles two kinds of coding staffs
The control identifying code, last control identifying code, controlling instruction code that method intersects this dynamic generation are encoded respectively, are returned
To remote control equipment, remote control equipment is decoded to two kinds of coding methods respectively, obtains control identifying code, the control of this dynamic generation
Instruction code processed is separately encoded, and confirms that identifying code and instruction are sent and execution is correct, is reduced control instruction and is uploaded and passed under confirming
During due to the possibility for being wirelessly transferred and being trapped, reduce the possibility for instructing and being performed by mistake, it is to avoid by mistake instruction and
Illegal control instruction produces influence to controlled system.
Brief description of the drawings
Fig. 1 is the method flow diagram based on the dynamic authentication wireless remote control for intersecting coding according to the embodiment of the present invention；
Fig. 2 is a kind of schematic diagram of coding method according to the embodiment of the present invention；
Fig. 3 is the schematic diagram of another coding method according to the embodiment of the present invention；
Fig. 4 is the schematic diagram of another coding method according to the embodiment of the present invention；
Fig. 5 is the schematic diagram of the coding/decoding method corresponding to coding method shown in Fig. 2；
Fig. 6 is the schematic diagram of the coding/decoding method corresponding to coding method shown in Fig. 3；
Fig. 7 is the schematic diagram of the coding/decoding method corresponding to coding method shown in Fig. 4；
Fig. 8 is the schematic diagram of the remote control equipment working condition according to the embodiment of the present invention；
Fig. 9 is the schematic diagram of the remotely-controlled equipment working condition according to the embodiment of the present invention.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, below in conjunction with specific embodiment, and reference
Accompanying drawing, the present invention is described in more detail.
As shown in figure 1, Fig. 1 is the method based on the dynamic authentication wireless remote control for intersecting coding according to the embodiment of the present invention
Flow chart, this method comprises the following steps：
Step 1：It is utilized respectively the first coding method F1With the second coding method F2To the control identifying code of this dynamic generation
VC, last control identifying code VLAnd controlling instruction code C is encoded, the first encoding control information I is obtained1With the second coding
Control information I2, wherein I1=F1(VC, C), I2=F2(VL, C)；
Wherein, the first coding method F1With the second coding method F2All it is the lossless coding method with 2 input parameters.
First coding method F1With the second coding method F2Can be from the coding method shown in Fig. 2, for the first coding staff
Method F1, two input codes are VCAnd C, for the second coding method F2, two input codes are VLAnd C, two input codes are by handing over
Knit, form a code, then basic coding is carried out to this code, obtain encoding control information.Basic coding method can be linear
Block code, convolutional code or cyclic code.
First coding method F1With the second coding method F2Can also be from the coding method shown in Fig. 3, two input code elder generations
After carry out basic coding, be interleaved after basic coding, obtain encoding control information.
First coding method F1With the second coding method F2Can also be from the coding method shown in Fig. 4, first to therein one
Individual input code carries out basic coding, then is interleaved, and forms a code, finally carries out basic coding to this code again, is compiled
Code control information.
Step 2：First encoding control information I1With the second encoding control information I2Sent by remote control equipment, pass through radio chains
Road is uploaded, and remotely-controlled equipment is received；
Step 3：Remotely-controlled equipment judges the first encoding control information I received1With the second encoding control information I2Whether with
The encoding control information that last time receives is identical, if identical, and the biography coding information down of remotely-controlled equipment passback last time is set to remote control
It is standby, then perform step 5；If it is different, remotely-controlled equipment is decoded to encoding control information, the control of this dynamic generation is obtained
Identifying code processed, last control identifying code and controlling instruction code：(VC', C1)=F1 -1(I1)、(VL', C2)=F2 -1(I2), obtain
To control identifying code, last control identifying code, the controlling instruction code of this dynamic generation；
Wherein, coding/decoding method F1 -1For corresponding to the first coding method F1Coding/decoding method, coding/decoding method F2 -1For corresponding to
Second coding method F2Coding/decoding method.
First coding method F1With the second coding method F2If selecting the coding method shown in Fig. 2, its corresponding decoding side
Method is as shown in figure 5, two input codes obtain control identifying code and controlling instruction code by decoding, deinterleaving.
First coding method F1With the second coding method F2If selecting the coding method shown in Fig. 3, its corresponding decoding side
Method is as shown in fig. 6, two input codes process deinterleavings, are being decoded, obtaining control identifying code and controlling instruction code respectively.
First coding method F1With the second coding method F2If selecting the coding method shown in Fig. 4, its corresponding decoding side
Method obtains control identifying code and control refers to as shown in fig. 7, two input codes by decoding, be deinterleaved again, then is decoded
Make code.
Step 4：Whether the last control identifying code of remotely-controlled equipment checking is effective, verifies decoded controlling instruction code
C1And C2It is whether identical；
If last control identifying code is effectively, and controlling instruction code C1And C2It is identical, then perform following steps：
I) control instruction is performed；
Ii) it is utilized respectively the first coding method F1With the second coding method F2Control identifying code to this dynamic generation, on
Control identifying code, controlling instruction code once carries out intersection coding, and coding information I is passed down1' and I2’；
Iii) remotely-controlled equipment, by Radio Link, coding information I will be passed down1' and I2', remote control equipment is returned to, then
Perform step 5；
If last control identifying code is invalid, or controlling instruction code C1And C2Differ, then remotely-controlled equipment, pass through nothing
Wired link, by pre-defined invalid information IN, remote control equipment is returned to, step 5 is then performed；
Wherein, the first coding method F is utilized respectively in step ii1With the second coding method F2Control to this dynamic generation
Identifying code processed, last control identifying code, controlling instruction code carry out intersection coding, intersect coding using one of following methods
Realize：
Method one：Intersect the following coded system of use of coding：
I1'=F2(VC', C)
I2'=F1(VL', C)
That is, compared with the coding of remote control equipment, coding method is exchanged, VC', C is with the second coding method F2Coding, VL', C is used
First coding method F1Coding；
Method two：Intersect the following coded system of use of coding：
I1'=F1(C, VC’)
I2'=F2(C, VL’)
That is, compared with the coding of remote control equipment, coding method is constant, and the parameter of two kinds of coding methods is exchanged；
Method three：Intersect the following coded system of use of coding：
I1'=F2(C, VC’)
I2'=F1(C, VL’)
That is, compared with the coding of remote control equipment, coding method is exchanged, and the parameter of two kinds of coding methods is also exchanged.
Step 5：Remote control equipment receives the back information of remotely-controlled equipment, judges whether passback command reception is overtime, if super
The back information that the predetermined time do not receive remote control equipment is crossed, then judges that passback control instruction receives time-out, reports that this is passed
Defeated failure, this controlling transmission terminates；Had not timed out if passback control instruction is received, perform step 6；
Step 6：Remote control equipment interprets back information, judges back information type；
If back information is invalid information IN, then remote control equipment report transmission fault, remote control equipment this instruction transmission fault
Count is incremented for base, if remote control equipment this instruction transmission fault base, which is counted, exceeds predetermined value, report controlling transmission failure, this secondary control
The end of transmission processed, if without departing from again by Radio Link, to the first encoding control information I of remotely-controlled equipment transmission1With
Two encoding control information I2；
If back information passes coding information under,：
I) it is utilized respectively the coding/decoding method F corresponding to two kinds of coding methods1 -1And F2 -1, under passing coding information solves
Code：(VC', C1)=F2 -1(I1’)、(VL', C2)=F1 -1(I2'), obtain the control identifying code, last of this dynamic generation
Control identifying code and controlling instruction code；
Ii V) is checkedC' whether with the V that is sent before remote control equipmentCIt is identical, check VL' whether with being sent before remote control equipment
VLIt is identical, C1、C2It is whether identical with the C sent before remote control equipment,
(1) if identical, this secondary control is completed, and is terminated；
(2) if it is different, then waiting controlled device to send back information again, while sending this encoding control information I repeatedly1
And I2；As the encoding control information I sent to remotely-controlled equipment1And I2More than pre-determined number NUPWhen, the event of remote control equipment report link
Barrier, and this encoding control information I is sent repeatedly1And I2；
Step 7：Remotely-controlled equipment sends back information always, until remote control equipment sends next effective information；If
Remotely-controlled equipment is sent after back information, is received again by this encoding control information I1And I2, then can determine that down that the link passed is asked
Topic, remote control equipment does not receive this back information always, and remotely-controlled equipment sends back information always, until remote control equipment is sent
Next effective information.
In above-described embodiment, remote control equipment and remotely-controlled equipment working state figure difference are as shown in Figure 8 and Figure 9.
Reference picture 8, for remote control equipment, original state is instruction wait state；
After instruction wait state, input control instruction, state is sent by the entry instruction of instruction wait state, compiled
Code, obtains encoding control information, encoding control information is then sent to remotely-controlled equipment, into reception wait state；
Wait state is being received, when receiving back information, back information is being interpreted and checked, if back information is
Under pass coding information, and check consistent, then entry instruction wait state, if back information passes coding information under, and is checked not
Unanimously, then entry instruction retransmission state, if back information is invalid information, entry instruction retransmission state；
In command retransmission state, encoding control information is retransmitted to remotely-controlled equipment, subsequently into reception wait state；
Reference picture 9, for remotely-controlled equipment, original state is reception wait state；
Wait state is being received, when receiving the encoding control information of remote control equipment transmission, into decoded state；
In decoded state, encoding control information is decoded, control identifying code, the last time of this dynamic generation is obtained
Control identifying code, controlling instruction code, determine whether repeat send instruction, if repeat send instruction, then enter send on
Secondary coding information state, if not repeating to send control instruction, then into encoding verification state；
Last time coding information state is being sent, the biography coding information down that last time sends remote control equipment is being returned into again, so
After return to reception wait state；
In encoding verification state, verifying last control identifying code, whether whether effective, controlling instruction code is identical, if testing
Card passes through, then entry instruction performs state；If checking does not pass through, into invalid information state；
In instruction execution state, control instruction is performed, intersection coding is carried out, coding will be intersected and returned as biography coding information down
Remote control equipment is transmitted to, reception wait state is then return to；
In invalid information state, invalid information is returned into remote control equipment, reception wait state is then return to；
It should be noted that in order that embodiments of the present invention are easier to understand, above description is eliminated for this area
Technical staff for be known and for embodiments of the present invention realizations be likely necessary more more specifically
Ins and outs.For example, above description eliminates one to coding methods such as existing linear block codes, convolutional code, cyclic codes
As property description.It should be understood that according to an embodiment of the invention method and scheme be only exemplary rather than it is restricted.
The specification for providing the present invention is in order to illustrate and describe, rather than for exhaustive or to limit the invention to institute public
The form opened.For one of ordinary skill in the art, many modifications and changes are all possible.
Particular embodiments described above, has been carried out further in detail to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail it is bright, should be understood that the foregoing is only the present invention specific embodiment, be not intended to limit the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvements done etc., should be included in the guarantor of the present invention
Within the scope of shield.
Claims (7)
1. a kind of method based on the dynamic authentication wireless remote control for intersecting coding, it is characterised in that including：
Step 1：It is utilized respectively the first coding method F1With the second coding method F2To the control identifying code V of this dynamic generationC、
Last control identifying code VLAnd controlling instruction code C is encoded, the first encoding control information I is obtained1With the second coding-control
Information I2, wherein I1=F1(VC, C), I2=F2(VL, C)；
Step 2：First encoding control information I1With the second encoding control information I2Sent by remote control equipment, by Radio Link
Pass, remotely-controlled equipment is received；
Step 3：Remotely-controlled equipment judges the first encoding control information I received1With the second encoding control information I2Whether with last time
The encoding control information of reception is identical, if identical, and the biography coding information down of remotely-controlled equipment passback last time turns to remote control equipment
And perform step 5；If it is different, remotely-controlled equipment is decoded to encoding control information, the control for obtaining this dynamic generation is tested
Demonstrate,prove code, last control identifying code and controlling instruction code；
Step 4：Whether the last control identifying code of remotely-controlled equipment checking is effective, verifies decoded controlling instruction code C1With
C2It is whether identical；
Step 5：Remote control equipment receives the back information of remotely-controlled equipment, judges whether passback command reception is overtime, if more than pre-
The fixed time does not receive the back information of remote control equipment, then judges that passback control instruction receives time-out, reports that this transmission is lost
Lose, this controlling transmission terminates；Had not timed out if passback control instruction is received, perform step 6；
Step 6：Remote control equipment interprets back information, judges back information type；
If back information is invalid information IN, then remote control equipment report transmission fault, remote control equipment this instruction transmission fault base counting
Plus 1, if remote control equipment this instruction transmission fault base, which is counted, exceeds predetermined value, report controlling transmission failure, this controlling transmission
Terminate, if without departing from again by Radio Link, to the first encoding control information I of remotely-controlled equipment transmission1With the second coding
Control information I2；
If back information passes coding information under,：
I) it is utilized respectively the coding/decoding method F corresponding to two kinds of coding methods1 -1And F2 -1, under passing coding information decodes：
(VC', C1)=F2 -1(I1’)、(VL', C2)=F1 -1(I2'), obtain the control identifying code of this dynamic generation, last control
Identifying code and controlling instruction code；
Ii V) is checkedC' whether with the V that is sent before remote control equipmentCIt is identical, check VL' whether with the V that is sent before remote control equipmentL
It is identical, C1、C2It is whether identical with the C sent before remote control equipment,
(1) if identical, this secondary control is completed, and is terminated；
(2) if it is different, then waiting controlled device to send back information again, while sending this encoding control information I repeatedly1And I2；
As the encoding control information I sent to remotely-controlled equipment1And I2More than pre-determined number NUPWhen, remote control equipment report link failure,
And this encoding control information I is sent repeatedly1And I2；
Step 7：Remotely-controlled equipment sends back information always, until remote control equipment sends next effective information；If distant
Control equipment to send after back information, be received again by this encoding control information I1And I2, then it can determine that down that the link passed is problematic,
Remote control equipment does not receive this back information always, and remotely-controlled equipment sends back information always, until under remote control equipment transmission
One effective information.
2. the method according to claim 1 based on the dynamic authentication wireless remote control for intersecting coding, it is characterised in that step
First coding method F described in 11With the second coding method F2All it is the lossless coding method with 2 input parameters.
3. the method according to claim 2 based on the dynamic authentication wireless remote control for intersecting coding, it is characterised in that described
First coding method F1With the second coding method F2From one of following three kinds of coding methods：
1) for the first coding method F1, two input codes are VCAnd C, for the second coding method F2, two input codes are VLWith
C, two input codes form a code by interweaving, then carry out basic coding to this code, obtain encoding control information；
2) for the first coding method F1With the second coding method F2, two input codes successively carry out basic coding, in basic coding
After be interleaved, obtain encoding control information；
3) for the first coding method F1With the second coding method F2, basic coding first is carried out to one of input code, then enter
Row interweaves, and forms a code, finally carries out basic coding to this code again, obtains encoding control information.
4. the method according to claim 3 based on the dynamic authentication wireless remote control for intersecting coding, it is characterised in that described
Basic coding is linear block codes, convolutional code or cyclic code.
5. the method according to claim 1 based on the dynamic authentication wireless remote control for intersecting coding, it is characterised in that step
Remotely-controlled equipment is decoded to encoding control information described in 3, obtains the control identifying code, last of this dynamic generation
Identifying code and controlling instruction code are controlled, remotely-controlled equipment is utilized respectively the first coding method F1Or the second coding method F2It is corresponding
Coding/decoding method F1 -1And F2 -1, encoding control information is decoded：(VC', C1)=F1 -1(I1)、(VL', C2)=F2 -1(I2),
Wherein, coding/decoding method F1 -1For corresponding to the first coding method F1Coding/decoding method, coding/decoding method F2 -1For corresponding to the second coding
Method F2Coding/decoding method.
6. the method according to claim 1 based on the dynamic authentication wireless remote control for intersecting coding, it is characterised in that step
Whether the last control identifying code of the checking of remotely-controlled equipment described in 4 is effective, verifies decoded controlling instruction code C1And C2It is
It is no identical, specifically include：
If last control identifying code is effectively, and controlling instruction code C1And C2It is identical, then perform following steps：
I) control instruction is performed；
Ii) it is utilized respectively the first coding method F1With the second coding method F2Control identifying code, last time to this dynamic generation
Control identifying code, controlling instruction code carry out intersection coding, coding information I is passed down1' and I2’；
Iii) remotely-controlled equipment, by Radio Link, coding information I will be passed down1' and I2', remote control equipment is returned to, is then performed
Step 5；
If last control identifying code is invalid, or controlling instruction code C1And C2Differ, then remotely-controlled equipment, pass through radio chains
Road, by pre-defined invalid information IN, remote control equipment is returned to, step 5 is then performed.
7. the method according to claim 6 based on the dynamic authentication wireless remote control for intersecting coding, it is characterised in that step
The first coding method F is utilized respectively described in ii1With the second coding method F2Control identifying code to this dynamic generation, upper one
Secondary control identifying code, controlling instruction code carry out intersection coding, intersect coding and are realized using one of following methods：
Method one：Intersect the following coded system of use of coding：
I1'=F2(VC', C)
I2'=F1(VL', C)
That is, compared with the coding of remote control equipment, coding method is exchanged, VC', C is with the second coding method F2Coding, VL', C uses first
Coding method F1Coding；
Method two：Intersect the following coded system of use of coding：
I1'=F1(C, VC’)
I2'=F2(C, VL’)
That is, compared with the coding of remote control equipment, coding method is constant, and the parameter of two kinds of coding methods is exchanged；
Method three：Intersect the following coded system of use of coding：
I1'=F2(C, VC’)
I2'=F1(C, VL’)
That is, compared with the coding of remote control equipment, coding method is exchanged, and the parameter of two kinds of coding methods is also exchanged.
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| CN1745569A (en) * | 2003-01-28 | 2006-03-08 | 汤姆森特许公司 | Robust mode staggercasting |
| CN101710852A (en) * | 2009-11-06 | 2010-05-19 | 北京交通大学 | LDPC code encoding/decoding method and encoder/decoder with encryption function |
| CN101848114A (en) * | 2010-04-15 | 2010-09-29 | 华为技术有限公司 | Fault detection method and device |
| CN103957074A (en) * | 2014-04-08 | 2014-07-30 | 北京三友伟业科技发展有限公司 | Data communication method based on intelligent terminal audio port |
| CN104113395A (en) * | 2014-08-04 | 2014-10-22 | 北京水木云科信息技术有限公司 | Safe transmission method for data of Internet of Things under wireless poor network environment |
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