CN109905461A - A kind of information switching method and system based on cloud service - Google Patents
A kind of information switching method and system based on cloud service Download PDFInfo
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Abstract
The present invention provides a kind of information switching method and system based on cloud service, wherein system includes cloud service platform, wireless sensor network and client computer, and method includes: that cloud service platform receives the perception information that wireless sensor network end obtains；The cloud service platform is perception information allocation of access rights grade according to the severity level of the corresponding sensor node of perception information；Perception information is stored in cloud storage subregion corresponding with its access permission level by the cloud service platform；The cloud service platform receives the access request that client computer is sent, and the access request includes the access permission level of the client computer and the cloud storage partition identification requested access to；Perception information in corresponding cloud storage subregion is sent to the client computer when the access permission level of the client computer is more than the corresponding access permission level of the cloud storage partition identification requested access to by the cloud service platform.
Description
Technical field
The present invention relates to field of information security technology, and in particular to a kind of information switching method based on cloud service and is
System.
Background technique
The collection of perception information is carried out using wireless sensor network technology in the related technology, and is sent to cloud service platform
In stored.During carrying out information exchange with cloud service platform, perception information is easy by third client computer
Side distorts, pries through, and information security cannot ensure.
Summary of the invention
In view of the above-mentioned problems, the present invention provides a kind of information switching method and system based on cloud service.
The purpose of the present invention is realized using following technical scheme:
First aspect present invention provides a kind of information switching method based on cloud service, this method comprises:
Cloud service platform receives the perception information that wireless sensor network end obtains, and the wireless sensor network includes multiple
Sensor node, multiple cluster heads and single aggregation node, each sensor node select nearest cluster head that cluster is added；Each cluster head
Receive each sensor node perception information for acquiring and sending in cluster, the aggregation node by wireless communication mode and cluster head into
Row communication, collects the perception information and is sent to the cloud service platform；
The cloud service platform is visited according to the severity level of the corresponding sensor node of perception information for perception information distribution
Ask Permission Levels；
Perception information is stored in cloud storage subregion corresponding with its access permission level by the cloud service platform；
The cloud service platform receives the access request that client computer is sent, and the access request includes the client
The cloud storage partition identification holding the access permission level of computer and requesting access to；
The cloud service platform is more than that the cloud requested access to is deposited in the access permission level of the client computer
When storing up the corresponding access permission level of partition identification, the perception information in corresponding cloud storage subregion is sent to the client
Computer.
Present embodiment is by being arranged access permission level for perception information, to ensure that perception information is transferred into ownership
The user of limit, it is ensured that the safe transmission of perception information.
In a kind of mode that can be realized of first aspect present invention, the cloud service platform is also according to perception information pair
The severity level for the sensor node answered determines important perception information, and the sense important to this using preset Encryption Algorithm
Know that information is encrypted.
In one embodiment, the severity level of sensor node can be configured according to the actual situation.It can will pass
The severity level of sensor node is divided into three or the above rank, wherein the perception of first level and/or second level can be chosen
Information is as important perception information.
In one embodiment, the Encryption Algorithm can be the existing algorithm for being suitable for encrypting perception information.
Corresponding decipherment algorithm can be set in the client computer for possessing higher access permission level or setting to decrypt
Encrypted perception information.
In another embodiment, corresponding Encryption Algorithm can be set at aggregation node, at aggregation node
Relatively important perception information is encrypted in advance.The decipherment algorithm can be pre-set in cloud service platform, or
It is set in predetermined client computer.
Above-described embodiment mode is encrypted according to the perception information of important sensor node, can ensure that third party cannot
The information content for knowing or distorting encryption has ensured the confidentiality of perception information.
In a kind of mode that can be realized of first aspect present invention, the cloud service platform is stored with sensor node
Severity level information list, the cloud service platform is according to the severity level of the corresponding sensor node of perception information
Perception information allocation of access rights grade, comprising:
The cloud service platform obtains the corresponding sensor node mark of perception information；
The list is inquired according to sensor node mark, determines that the sensor node identifies corresponding access right
Limit grade；
For the determining access permission level of perception information distribution.
Second aspect of the present invention provides a kind of Information Exchange System based on cloud service, and the system comprises wireless sensings
Device network, cloud service platform and client computer, wherein cloud service platform includes cloud storage library, and cloud storage library is equipped with multiple clouds
Partition holding, the cloud service platform further include:
Receiving unit, the perception information obtained for receiving wireless sensor network end, the wireless sensor network include
Multiple sensor nodes, multiple cluster heads and single aggregation node, each sensor node select nearest cluster head that cluster is added；Each
Cluster head receives each sensor node perception information for acquiring and sending in cluster, the aggregation node mode and cluster by wireless communication
Head is communicated, and is collected the perception information and is sent to the cloud service platform；
Allocation unit is visited for the severity level according to the corresponding sensor node of perception information for perception information distribution
Ask Permission Levels；
Storage unit, for being stored in perception information in cloud storage subregion corresponding with its access permission level；
Execution unit is accessed, for receiving the access request of client computer transmission, the access request includes described
The access permission level of client computer and the cloud storage partition identification requested access to；
The access execution unit is also used to visit in the access permission level of the client computer more than the request
When the corresponding access permission level of the cloud storage partition identification asked, the perception information in corresponding cloud storage subregion is sent to institute
State client computer.
Present embodiment is by being arranged access permission level for perception information, to ensure that perception information is transferred into ownership
The user of limit, it is ensured that the safe transmission of perception information.
In a kind of mode that can be realized of second aspect of the present invention, the allocation unit is corresponding also according to perception information
Sensor node severity level, determine important perception information, and the perception important to this using preset Encryption Algorithm
Information is encrypted.
Above-described embodiment is encrypted according to the perception information of important sensor node, can ensure that third party cannot know
Or the information content of encryption is distorted, ensure the confidentiality of perception information.
In a kind of mode that can be realized of second aspect of the present invention, the allocation unit is stored with sensor node
The list of severity level information, the allocation unit is according to the severity level of the corresponding sensor node of perception information, for perception
Information allocation of access rights grade, comprising:
The allocation unit obtains the corresponding sensor node mark of perception information；
The list is inquired according to sensor node mark, determines that the sensor node identifies corresponding access right
Limit grade；
For the determining access permission level of perception information distribution.
The invention has the benefit that realizing the collection of perception information by wireless sensor network, and taken by cloud
Platform be engaged in the corresponding access permission level of perception information distribution, and important perception information is encrypted, guarantees perception
Information is only transmitted to the user for possessing the user of access authority or Gong having permission and checks, perception information is effectively prevent to transmit
It distorted, pry through by third party in the process, it is ensured that the safety of collected perception information realizes that cloud service platform and client calculate
The secure exchange of information between machine.
Detailed description of the invention
The present invention will be further described with reference to the accompanying drawings, but the embodiment in attached drawing is not constituted to any limit of the invention
System, for those of ordinary skill in the art, without creative efforts, can also obtain according to the following drawings
Other attached drawings.
Fig. 1 is a kind of process signal of information switching method based on cloud service of an illustrative embodiment of the invention
Figure；
Fig. 2 is a kind of structural representation frame of Information Exchange System based on cloud service of an illustrative embodiment of the invention
Figure；
Fig. 3 is the structural schematic block diagram of the cloud service platform of an illustrative embodiment of the invention.
Appended drawing reference:
Wireless sensor network 1, cloud service platform 2, client computer 3, cloud storage library 10, receiving unit 20, distribution
Unit 30, storage unit 40, access execution unit 50.
Specific embodiment
The invention will be further described with the following Examples.
Referring to Fig. 1, first aspect present invention embodiment provides a kind of information switching method based on cloud service, this method
Include:
S1 cloud service platform receives the perception information that wireless sensor network end obtains, and the wireless sensor network includes more
A sensor node, multiple cluster heads and single aggregation node, each sensor node select nearest cluster head that cluster is added；Each cluster
Head receives each sensor node perception information for acquiring and sending in cluster, the aggregation node mode and cluster head by wireless communication
It is communicated, collect the perception information and is sent to the cloud service platform.
Cloud service platform described in S2 is distributed according to the severity level of the corresponding sensor node of perception information for perception information
Access permission level.
Perception information is stored in cloud storage subregion corresponding with its access permission level by cloud service platform described in S3.
Cloud service platform described in S4 receives the access request that client computer is sent, and the access request includes the visitor
The access permission level of family end computer and the cloud storage partition identification requested access to.
Cloud service platform described in S5 is more than the cloud requested access in the access permission level of the client computer
When partition holding identifies corresponding access permission level, the perception information in corresponding cloud storage subregion is sent to the client
Hold computer.
Present embodiment is by being arranged access permission level for perception information, to ensure that perception information is transferred into ownership
The user of limit, it is ensured that the safe transmission of perception information.
In a kind of mode that can be realized of first aspect present invention, the cloud service platform is also according to perception information pair
The severity level for the sensor node answered determines important perception information, and the sense important to this using preset Encryption Algorithm
Know that information is encrypted.
In one embodiment, the severity level of sensor node can be configured according to the actual situation.It can will pass
The severity level of sensor node is divided into three or the above rank, wherein the perception of first level and/or second level can be chosen
Information is as important perception information.
In one embodiment, the Encryption Algorithm can be the existing algorithm for being suitable for encrypting perception information.
Corresponding decipherment algorithm can be set in the client computer for possessing higher access permission level or setting to decrypt
Encrypted perception information.
In another embodiment, corresponding Encryption Algorithm can be set at aggregation node, at aggregation node
Relatively important perception information is encrypted in advance.The decipherment algorithm can be pre-set in cloud service platform, or
It is set in predetermined client computer.
Above-described embodiment mode is encrypted according to the perception information of important sensor node, can ensure that third party cannot
The information content for knowing or distorting encryption has ensured the confidentiality of perception information.
In a kind of mode that can be realized of first aspect present invention, the cloud service platform is stored with sensor node
Severity level information list, the cloud service platform is according to the severity level of the corresponding sensor node of perception information
Perception information allocation of access rights grade, comprising:
The cloud service platform obtains the corresponding sensor node mark of perception information；
The list is inquired according to sensor node mark, determines that the sensor node identifies corresponding access right
Limit grade；
For the determining access permission level of perception information distribution.
As shown in Figure 2 and Figure 3, second aspect of the present invention provides a kind of Information Exchange System based on cloud service, the system
System includes wireless sensor network 1, cloud service platform 2 and client computer 3, and wherein cloud service platform 2 includes cloud storage library
10, cloud storage library 10 is equipped with multiple cloud storage subregions, the cloud service platform 2 further include:
Receiving unit 20, the perception information obtained for receiving wireless sensor network end, the wireless sensor network 1 wrap
Multiple sensor nodes, multiple cluster heads and single aggregation node are included, each sensor node selects nearest cluster head that cluster is added；Often
A cluster head receives the perception information that each sensor node acquire and sent in cluster, the aggregation node by wireless communication mode and
Cluster head is communicated, and is collected the perception information and is sent to the cloud service platform 2；
Allocation unit 30 is distributed for the severity level according to the corresponding sensor node of perception information for perception information
Access permission level；
Storage unit 40, for being stored in perception information in cloud storage subregion corresponding with its access permission level；
Execution unit 50 is accessed, for receiving the access request of the transmission of client computer 3, the access request includes institute
The cloud storage partition identification stating the access permission level of client computer 3 and requesting access to；
The access execution unit 50 is also used in the access permission level of the client computer 3 be more than the request
When the corresponding access permission level of the cloud storage partition identification of access, the perception information in corresponding cloud storage subregion is sent to
The client computer 3.
Present embodiment is by being arranged access permission level for perception information, to ensure that perception information is transferred into ownership
The user of limit, it is ensured that the safe transmission of perception information.
In a kind of mode that can be realized of second aspect of the present invention, the allocation unit 30 is also according to perception information pair
The severity level for the sensor node answered determines important perception information, and the sense important to this using preset Encryption Algorithm
Know that information is encrypted.
Above-described embodiment is encrypted according to the perception information of important sensor node, can ensure that third party cannot know
Or the information content of encryption is distorted, ensure the confidentiality of perception information.
In a kind of mode that can be realized of second aspect of the present invention, the allocation unit 30 is stored with sensor node
Severity level information list, the allocation unit 30 is according to the severity level of the corresponding sensor node of perception information
Perception information allocation of access rights grade, comprising:
The allocation unit 30 obtains the corresponding sensor node mark of perception information；
The list is inquired according to sensor node mark, determines that the sensor node identifies corresponding access right
Limit grade；
For the determining access permission level of perception information distribution.
The above embodiment of the present invention realizes the collection of perception information by wireless sensor network 1, and passes through cloud service
Platform 2 distributes corresponding access permission level to perception information, and encrypts to important perception information, guarantees perception letter
Breath is only transmitted to the user for possessing the user of access authority or Gong having permission and checks, perception information is effectively prevent to be transmitted across
It distorted, pry through by third party in journey, it is ensured that the safety of collected perception information realizes that cloud service platform 2 and client calculate
The secure exchange of information between machine 3.
In the related technology, people generally use wireless sensor network 1 special object is monitored and data acquisition, with
Collect corresponding perception information.However due to the defect of the finite energy of sensor node in wireless sensor network 1, very big shadow
Ring the stability and precision of perception information collection.
For this problem, in a kind of information switching method and system based on cloud service of above-described embodiment, the remittance
Each cluster head is divided into directly transmission cluster head and indirect communication cluster head two types by poly- node, described in data transmission procedure
Indirect communication cluster head in its communication range relative to it in the closer cluster head of aggregation node, select nearest cluster head as
The received perception information of institute is sent to next-hop by next-hop；And it directly transmits cluster head and directly sends out the received perception information of institute
It send to the aggregation node；
Wherein, each cluster head is divided into directly transmission cluster head and indirect communication cluster head two types, packet by the aggregation node
It includes:
(1) aggregation node determines that message, each cluster head receive the distance and determines message to each cluster head broadcast distances
Afterwards, judge whether the aggregation node is in the communication range of itself, if so, sending feedback information to the aggregation node；
(2) aggregation node by all cluster heads for sending feedback information be demarcated as can direct communication cluster head, and calculate each
Can direct communication cluster head communication convenience value, according to the descending sequence of communication convenience value to can direct communication cluster head arrange
Sequence, by preceding 1/3 can direct communication cluster head be divided into directly transmission cluster head, using it is remaining can direct communication cluster head as cluster to be selected
Head；The cluster head that do not demarcate in all cluster heads to be selected and network is all divided into indirect communication cluster head by the aggregation node, and to
Each cluster head broadcasts division information；
The calculation formula of the communication convenience value are as follows:
In formula, QaIndicate can direct communication cluster head a communication convenience value, D (a, b) be it is described can direct communication cluster head a with
The distance of c-th of cluster head, M in its communication rangeaFor it is described can cluster head quantity in direct communication cluster head a communication range, D (a,
S) for it is described can direct communication cluster head a arrive the distance of aggregation node, D (s, b) is aggregation node and b-th can direct communication cluster head
Distance, M be can direct communication cluster head quantity, NaFor it is described can sensor node quantity in direct communication cluster head a cluster, Nb
For described b-th can sensor node quantity in direct communication cluster head cluster, u1、u2For preset weight coefficient, and meet u1+
u2=1.
The present embodiment enables cluster head by the way that cluster head is divided into directly transmission cluster head and indirect communication cluster head two types
It is enough communicated using different communication modes with aggregation node according to own type, it improves and is routed between cluster head and aggregation node
Flexibility.Wherein according to cluster head deployment scenario determination in a network can direct communication cluster head, ensure subsequently selected direct biography
Defeated cluster head can be communicated directly with aggregation node.
The present embodiment, which is further determined according to communication convenience value, directly transmits cluster head, correspondingly proposes communication convenience value
Calculation formula.According to the descending sequence of communication convenience value to can direct communication cluster head be ranked up, will sort preceding 1/3
Can direct communication cluster head be demarcated as directly transmitting cluster head, on the one hand ensured that appropriate number of cluster head and aggregation node are directly logical
Letter, ensures the collection of perception information, on the other hand makes that closer relative to other cluster heads apart from aggregation node, cluster is sweeping
Cluster head has bigger preference for probability and aggregation node direct communication, reduces perception information to avoid meaningless perception information forwarding
The efficiency of transmission, further the whole energy consumption of cluster head is saved in relatively optimization, improves the stability that wireless sensor network 1 is run.
In a kind of mode that can be realized, every a preset period Δ T0, the aggregation node obtain it is all
Calibration can direct communication cluster head energy information, calculate wherein it is all directly transmit cluster heads current remainings average value
Eavg1And the average value E of the current remaining of all cluster heads to be selectedavg2If Eavg1< 0.9Eavg2, the aggregation node choosing
It selects R cluster heads to be selected to be updated to directly transmit cluster head, and broadcasts update message to corresponding cluster head to be selected, the R is according to following
Formula determines:
In formula, EminFor preset energy lower limit, σ is the quantity of cluster head to be selected,It is less than E for current remainingmin
Direct transmission cluster head quantity,Expression pair
Calculated result be rounded.
The present embodiment, will be certain when the average energy value for directly transmitting cluster head is lower than cluster head average energy value certain proportion to be selected
The cluster head to be selected of quantity is updated to directly transmit cluster head, to share the load of current directly transmission cluster head, to further balance
The energy of each cluster head effectively avoids the generation of Energy volution phenomenon；The present embodiment further provides the cluster head to be selected that need to be updated
The calculation formula of number R determines R value according to the calculation formula so that update cluster head number to be selected with directly transmission cluster head
Average energy value and cluster head average energy value to be selected difference increase and increase, and be lower than preset energy lower limit direct biography
The increasing for quantity of defeated cluster head and increase, be conducive to more reasonably balance directly transmission cluster head and cluster head to be selected energy.
In a kind of mode that can be realized, described R cluster heads to be selected of aggregation node selection are updated to directly transmit cluster head,
Include:
(1) preferred value of each cluster head to be selected is calculated according to the following formula:
In formula, GyFor the preferred value of cluster head y to be selected, QyFor the communication convenience value of cluster head y to be selected, EyFor the energy of acquisition
Measure the current remaining of cluster head y to be selected in information, QmaxFor the maximum communication convenient values in cluster head to be selected, Emax2For acquisition
Maximum current remaining in the energy information in cluster head to be selected；Weight respectively based on communication convenience value
Coefficient, the weight coefficient based on energy value, and
(2) each cluster head to be selected is sorted according to the descending sequence of preferred value, R cluster heads to be selected are updated to directly before selecting
Connect transmission cluster head.
The present embodiment creatively proposes the measurement index of Superiority Value, selects R cluster heads to be selected to update according to Superiority Value
Directly to transmit cluster head.By this selection mode, communication convenience value and current remaining can be made all biggish to
Select cluster head that there is bigger preference for probability to be updated to directly transmit cluster head.The present embodiment can be near balance aggregation node
Under the premise of cluster head energy, it is reduced as far as perception information being directly transferred to the energy consumption of aggregation node, and further ensure that
The direct transmission cluster head updated has enough energy and aggregation node direct communication, ensures the reliability of perception information transmission.
It is apparent to those skilled in the art that for convenience and simplicity of description, only with above-mentioned each function
The division progress of module can according to need and for example, in practical application by above-mentioned function distribution by different function moulds
Block is completed, i.e., the internal structure of system is divided into different functional modules, to complete all or part of function described above
Energy.The system of foregoing description and the specific work process of terminal, can refer to corresponding processes in the foregoing method embodiment, herein
It repeats no more.
Through the above description of the embodiments, those skilled in the art can be understood that it should be appreciated that can
To realize the embodiments described herein with hardware, software, firmware, middleware, code or its any appropriate combination.For hardware
It realizes, processor can be realized in one or more the following units: specific integrated circuit, digital signal processor, number letter
Number processing system, field programmable gate array, processor, controller, microcontroller, microprocessor, is set programmable logic device
Count other electronic units or combinations thereof for realizing functions described herein.For software implementations, the part of embodiment or complete
Portion's process can instruct relevant hardware to complete by computer program.When realization, above procedure can be stored in meter
It instructs in calculation machine readable medium or as the one or more on computer-readable medium or code is transmitted.It is computer-readable
Medium includes computer storage media and communication media, and wherein communication media includes convenient for passing from a place to another place
Send any medium of computer program.Storage medium can be any usable medium that computer can access.It is computer-readable
Medium can include but is not limited to random access memory, read-only memory mirror image, band Electrically Erasable Programmable Read-Only Memory or its
His optical disc storage, magnetic disk storage medium or other magnetic-memory systems or it can be used in carrying or storing that there is instruction or number
According to structure type desired program code and can be by any other medium of computer access.
Finally it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than the present invention is protected
The limitation of range is protected, although explaining in detail referring to preferred embodiment to the present invention, those skilled in the art are answered
Work as understanding, it can be with modification or equivalent replacement of the technical solution of the present invention are made, without departing from the reality of technical solution of the present invention
Matter and range.
Claims (8)
1. a kind of information switching method based on cloud service, characterized in that this method comprises:
Cloud service platform receives the perception information that wireless sensor network end obtains, and the wireless sensor network includes multiple sensings
Device node, multiple cluster heads and single aggregation node, each sensor node select nearest cluster head that cluster is added；Each cluster head receives
The perception information that each sensor node is acquired and sent in cluster, the aggregation node by wireless communication led to cluster head by mode
Letter, collects the perception information and is sent to the cloud service platform；
The cloud service platform distributes access right according to the severity level of the corresponding sensor node of perception information for perception information
Limit grade；
Perception information is stored in cloud storage subregion corresponding with its access permission level by the cloud service platform；
The cloud service platform receives the access request that client computer is sent, and the access request includes the client meter
The access permission level of calculation machine and the cloud storage partition identification requested access to；
The cloud service platform is more than the cloud storage requested access to point in the access permission level of the client computer
When area identifies corresponding access permission level, the perception information in corresponding cloud storage subregion is sent to the client and is calculated
Machine.
2. a kind of information switching method based on cloud service according to claim 1, characterized in that the aggregation node will
Each cluster head is divided into directly transmission cluster head and indirect communication cluster head two types, in data transmission procedure, the indirect communication
Cluster head in its communication range relative to it in the closer cluster head of aggregation node, select nearest cluster head as next-hop,
The received perception information of institute is sent to next-hop；And directly transmit cluster head the received perception information of institute is sent directly to it is described
Aggregation node；
Wherein, each cluster head is divided into directly transmission cluster head and indirect communication cluster head two types by the aggregation node, comprising:
(1) after the aggregation node determines that message, each cluster head receive the determining message of the distance to each cluster head broadcast distances, sentence
Whether the aggregation node that breaks is in the communication range of itself, if so, sending feedback information to the aggregation node；
(2) aggregation node by all cluster heads for sending feedback information be demarcated as can direct communication cluster head, and calculate respectively can be straight
Connect letter cluster head communication convenience value, according to the descending sequence of communication convenience value to can direct communication cluster head be ranked up,
By preceding 1/3 can direct communication cluster head be divided into directly transmission cluster head, using it is remaining can direct communication cluster head as cluster head to be selected；
The cluster head that do not demarcate in all cluster heads to be selected and network is all divided into indirect communication cluster head by the aggregation node, and to each cluster
Head broadcast division information；
The calculation formula of the communication convenience value are as follows:
In formula, QaIndicate can direct communication cluster head a communication convenience value, D (a, b) be it is described can direct communication cluster head a communicate with
The distance of c-th of cluster head, M in rangeaFor it is described can cluster head quantity in direct communication cluster head a communication range, D (a, s) is institute
State can direct communication cluster head a to aggregation node distance, D (s, b) be aggregation node and b-th can direct communication cluster head away from
From, M be can direct communication cluster head quantity, NaFor it is described can sensor node quantity in direct communication cluster head a cluster, NbFor institute
State b-th can sensor node quantity in direct communication cluster head cluster, u1、u2For preset weight coefficient, and meet u1+u2=
1。
3. a kind of information switching method based on cloud service according to claim 2, characterized in that the cloud service platform
Also according to the severity level of the corresponding sensor node of perception information, important perception information is determined, and use preset encryption
The algorithm perception information important to this encrypts.
4. a kind of information switching method based on cloud service according to claim 2, characterized in that the cloud service platform
It is stored with the list of the severity level information of sensor node, the cloud service platform is according to the corresponding sensor section of perception information
The severity level of point is perception information allocation of access rights grade, comprising:
The cloud service platform obtains the corresponding sensor node mark of perception information；
The list is inquired according to sensor node mark, determines that the sensor node identifies corresponding access authority etc.
Grade；
For the determining access permission level of perception information distribution.
5. a kind of Information Exchange System based on cloud service, characterized in that the system comprises wireless sensor networks, cloud service
Platform and client computer, wherein cloud service platform includes cloud storage library, and cloud storage library is equipped with multiple cloud storage subregions, described
Cloud service platform further include:
Receiving unit, the perception information obtained for receiving wireless sensor network end, the wireless sensor network includes multiple
Sensor node, multiple cluster heads and single aggregation node, each sensor node select nearest cluster head that cluster is added；Each cluster head
Receive each sensor node perception information for acquiring and sending in cluster, the aggregation node by wireless communication mode and cluster head into
Row communication, collects the perception information and is sent to the cloud service platform；
Allocation unit distributes access right for the severity level according to the corresponding sensor node of perception information for perception information
Limit grade；
Storage unit, for being stored in perception information in cloud storage subregion corresponding with its access permission level；
Execution unit is accessed, for receiving the access request of client computer transmission, the access request includes the client
The cloud storage partition identification holding the access permission level of computer and requesting access to；
The access execution unit is also used in the access permission level of the client computer be more than described request access to
When the corresponding access permission level of cloud storage partition identification, the perception information in corresponding cloud storage subregion is sent to the visitor
Family end computer.
6. a kind of Information Exchange System based on cloud service according to claim 5, characterized in that the aggregation node will
Each cluster head is divided into directly transmission cluster head and indirect communication cluster head two types, in data transmission procedure, the indirect communication
Cluster head in its communication range relative to it in the closer cluster head of aggregation node, select nearest cluster head as next-hop,
The received perception information of institute is sent to next-hop；And directly transmit cluster head the received perception information of institute is sent directly to it is described
Aggregation node；
Wherein, each cluster head is divided into directly transmission cluster head and indirect communication cluster head two types by the aggregation node, comprising:
(1) after the aggregation node determines that message, each cluster head receive the determining message of the distance to each cluster head broadcast distances, sentence
Whether the aggregation node that breaks is in the communication range of itself, if so, sending feedback information to the aggregation node；
(2) aggregation node by all cluster heads for sending feedback information be demarcated as can direct communication cluster head, and calculate respectively can be straight
Connect letter cluster head communication convenience value, according to the descending sequence of communication convenience value to can direct communication cluster head be ranked up,
By preceding 1/3 can direct communication cluster head be divided into directly transmission cluster head, using it is remaining can direct communication cluster head as cluster head to be selected；
The cluster head that do not demarcate in all cluster heads to be selected and network is all divided into indirect communication cluster head by the aggregation node, and to each cluster
Head broadcast division information；
The calculation formula of the communication convenience value are as follows:
In formula, QaIndicate can direct communication cluster head a communication convenience value, D (a, b) be it is described can direct communication cluster head a communicate with
The distance of c-th of cluster head, M in rangeaFor it is described can cluster head quantity in direct communication cluster head a communication range, D (a, s) is institute
State can direct communication cluster head a to aggregation node distance, D (s, b) be aggregation node and b-th can direct communication cluster head away from
From, M be can direct communication cluster head quantity, NaFor it is described can sensor node quantity in direct communication cluster head a cluster, NbFor institute
State b-th can sensor node quantity in direct communication cluster head cluster, u1、u2For preset weight coefficient, and meet u1+u2=
1。
7. a kind of Information Exchange System based on cloud service according to claim 6, characterized in that the allocation unit is also
According to the severity level of the corresponding sensor node of perception information, important perception information is determined, and calculated using preset encryption
The method perception information important to this encrypts.
8. a kind of Information Exchange System based on cloud service according to claim 6, characterized in that the allocation unit is deposited
The list of the severity level information of sensor node is contained, the allocation unit is according to the corresponding sensor node of perception information
Severity level is perception information allocation of access rights grade, comprising:
The allocation unit obtains the corresponding sensor node mark of perception information；
The list is inquired according to sensor node mark, determines that the sensor node identifies corresponding access authority etc.
Grade；
For the determining access permission level of perception information distribution.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910066541.7A CN109905461B (en) | 2019-01-24 | 2019-01-24 | Information exchange method and system based on cloud service |
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| CN103905469A (en) * | 2014-04-30 | 2014-07-02 | 电子科技大学 | Safety control system and method applied to smart power grid wireless sensor network and cloud computing |
| CN106817739A (en) * | 2015-12-02 | 2017-06-09 | 扬州大学 | A kind of wireless sensor and actor networks based on mobile sink node Energy Efficient are by agreement |
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| US20100083035A1 (en) * | 2008-09-30 | 2010-04-01 | Electronics And Telecommunications Research Institute | Method for wireless communication in wireless sensor network environment |
| CN103905469A (en) * | 2014-04-30 | 2014-07-02 | 电子科技大学 | Safety control system and method applied to smart power grid wireless sensor network and cloud computing |
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