CN107948129B - SDN-based Internet of things fog computing network system and control method thereof - Google Patents
SDN-based Internet of things fog computing network system and control method thereof Download PDFInfo
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- CN107948129B CN107948129B CN201710960372.2A CN201710960372A CN107948129B CN 107948129 B CN107948129 B CN 107948129B CN 201710960372 A CN201710960372 A CN 201710960372A CN 107948129 B CN107948129 B CN 107948129B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
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- H—ELECTRICITY
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Abstract
The invention provides an SDN-based Internet of things fog computing network system and a control method thereof, wherein the system comprises a local sub-network, fog computing equipment, a distributed SDN controller and cloud computing equipment; the local sub-network comprises data acquisition equipment, controlled equipment and a local SDN controller, wherein the data acquisition equipment and the controlled equipment are respectively connected with the local SDN controller; the distributed SDN controller is used for verifying received request information sent by the local SDN controller and sending request confirmation information to the fog computing device and the local SDN controller. According to the SDN-based Internet of things fog computing network system and the control method thereof, the access equipment is subjected to hierarchical authentication and data are subjected to hierarchical processing through the classification of the network system, the network safety is guaranteed, and the data processing efficiency and the network resource utilization rate are improved.
Description
Technical Field
The invention relates to the technical field of Internet of things, in particular to an Internet of things fog computing network system based on an SDN and a control method thereof.
Background
The industrial internet of things is an emerging development mode generated by fusing and transforming the traditional industry by utilizing the advantages of the internet. The method realizes the collection of any equipment information needing monitoring, information transmission and interaction on the site of industrial production through various information sensing equipment and technologies, and performs information transmission, calculation and analysis through the Internet, and then feeds the result back to a front-line operator and production equipment to complete execution. The Internet of things equipment is numerous, and the network system of the Internet of things is scientifically designed, so that the Internet of things can be efficiently and accurately controlled, and the production efficiency is improved.
In the prior art, the design of a network system of the internet of things is mainly divided into two schemes: the system comprises an Internet of things network system without cloud computing, and an Internet of things network system with cloud computing, wherein data processing, analysis and control decision result of equipment are completed through local computing equipment. The data processing, analysis and control decision result of the equipment in the latter scheme are completed through an edge cloud computing platform.
The two schemes have the following defects respectively: in the first scheme, data processing, analysis and control decision results of controlled equipment are completed through the computing equipment of the local sub-network, the computing equipment of the local sub-network has limited computing capacity, and only simple data in a small-scale internet of things system can be analyzed and processed, so that the processing efficiency is greatly reduced in the case of a large amount of data, and even complex data cannot be processed at all; in the second scheme, with the continuous expansion of the scale of the internet of things, massive data is processed by the cloud computing platform, the authentication work of accessing the internet of things equipment into the cloud computing platform is also completed by the cloud computing platform, the cloud computing platform is far away from the internet of things equipment, the transmission delay is large, and the data processing efficiency of the cloud computing platform is reduced.
Disclosure of Invention
Technical problem to be solved
The invention aims to provide an SDN-based Internet of things fog computing network system and a control method thereof, and solves the technical problems of low data processing efficiency and poor safety of the Internet of things system in the prior art.
(II) technical scheme
In order to solve the technical problem, in one aspect, the present invention provides an SDN-based internet of things fog computing network system, including:
a local subnetwork, a fog computing device, a distributed SDN controller, and a cloud computing device;
the local sub-network is interconnected between the fog computing device, between the fog computing device and the distributed SDN controller, and between the distributed SDN controller and the cloud computing device;
the local sub-network comprises data acquisition equipment, controlled equipment and a local SDN controller, wherein the data acquisition equipment and the controlled equipment are respectively connected with the local SDN controller, the data acquisition equipment is used for acquiring data to be processed, the local SDN controller is used for analyzing the data to be processed and judging whether the data to be processed needs to be sent to the fog computing equipment or the cloud computing equipment for processing, and the controlled equipment is used for executing a control instruction fed back by the local SDN controller;
the fog computing equipment is used for processing the data to be processed;
the distributed SDN controller is used for monitoring the use state of the fog computing device, verifying the received request information sent by the local SDN controller, and sending request confirmation information to the fog computing device and the local SDN controller;
the cloud computing equipment is used for processing the data to be processed.
In another aspect, the present invention provides a method for controlling an SDN-based internet of things fog computing network system, including:
the method comprises the steps that a local SDN controller judges whether a local sub-network can process data to be processed or not according to the data type of the data to be processed, and if the fact that the data to be processed cannot be processed is judged, request information for using first fog computing equipment is sent to a first distributed SDN controller;
the first distributed SDN controller sends request confirmation information using the first fog computing device to the local SDN controller and the first fog computing device according to the request information using the first fog computing device;
the local SDN controller sends data processing request information to the first fog computing device according to the request confirmation information of the first fog computing device;
and the first fog computing equipment processes the data to be processed according to the data processing request information.
Further, the request confirmation information using the first fog computing device includes an access credential.
Further, the method further comprises:
after the first fog computing device processes the data to be processed, fog computing device decision information is obtained, and the fog computing device decision information is sent to the local SDN controller;
the local SDN controller sends a control instruction to the controlled device according to the fog computing device decision information to instruct the controlled device to execute the control instruction.
Further, the processing, by the first fog calculating device, the to-be-processed data according to the data processing request information specifically includes:
the first fog computing equipment judges whether the first fog computing equipment can process the data to be processed according to the data processing request information;
if the data to be processed can be processed by the data processing device, processing the data to be processed;
if the data to be processed cannot be processed by the first distributed SDN controller, sending request information for using second fog computing equipment to the first distributed SDN controller;
the first distributed SDN controller sends request confirmation information of using the second fog computing device to the second fog computing device according to the request information of using the second fog computing device;
the first fog computing device sending the data processing request information to the second fog computing device;
and the second fog computing equipment processes the data to be processed in cooperation with the first fog computing equipment according to the request confirmation information using the second fog computing equipment.
Further, the sending, by the first distributed SDN controller, the request confirmation information for using the second fog computing device to the second fog computing device according to the request information for using the second fog computing device specifically includes:
the first distributed SDN controller judges whether the second fog computing device is in the monitoring range of the first distributed SDN controller according to the request information of the second fog computing device;
if the monitoring range is judged to be within the monitoring range, sending request confirmation information for using the second fog computing equipment to the second fog computing equipment;
if the second fog computing device is judged to be out of the monitoring range, sending request confirmation information for using the second fog computing device to a second distributed SDN controller to which the second fog computing device belongs;
sending, by the second distributed SDN controller, the request acknowledgement information for using the second fog computing device to the second fog computing device.
Further, the sending, by the local SDN controller, the control instruction to the controlled device according to the fog computing device decision information specifically includes:
the local SDN controller judges whether cloud computing equipment is required to process the data to be processed or not according to the fog computing equipment decision information;
if the fact that the cloud computing equipment is not required to process the data to be processed is judged and obtained, a control instruction is sent to the controlled equipment according to the decision information of the fog computing equipment;
if the fact that the cloud computing equipment needs to process the data to be processed is judged and obtained, sending the data processing request information to the cloud computing equipment;
the cloud computing equipment processes the data to be processed according to the data processing request information to obtain cloud computing equipment decision information, and sends the cloud computing equipment decision information to the local SDN controller;
and the local SDN controller sends a control instruction to the controlled equipment according to the cloud computing equipment decision information.
Further, the fog computing device decision information carries at least a controlled device ID.
Further, the method further comprises:
the local SDN controller encrypts the request information for using the first fog computing device.
In another aspect, the present invention provides an electronic device for controlling an SDN-based internet of things fog computing network system, including:
the processor and the memory are communicated with each other through a bus; the memory stores program instructions executable by the processor, which when called by the processor are capable of performing the methods described above.
In yet another aspect, the invention provides a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, cause the computer to perform the method described above.
In a further aspect, the invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the method described above.
(III) advantageous effects
According to the SDN-based Internet of things fog computing network system and the control method thereof, the access equipment is classified and authenticated and the data to be processed is classified and processed through classification of the network system, so that the network safety is guaranteed, the data processing efficiency is improved, and the utilization rate of network resources is improved.
Drawings
Fig. 1 is a schematic diagram of an SDN-based internet of things fog computing network system according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a control method of an SDN-based internet of things fog computing network system according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of data processing request information sent by a local SDN controller to a fog computing device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of fog computing device decision information sent by a fog computing device to a local SDN controller according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a transmission link establishment procedure for requesting data processing by a fog computing device, in accordance with an embodiment of the present invention;
fig. 6 is a schematic structural diagram of request information sent by a first fog computing device to a first distributed SDN controller using a second fog computing device according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a first transmission link establishment procedure for requesting cooperation of second mist computing devices for data processing, in accordance with an embodiment of the present invention;
FIG. 8 is a schematic diagram of a second transmission link establishment procedure for requesting cooperation of a second mist computing device for data processing, in accordance with an embodiment of the present invention;
fig. 9 is a schematic structural diagram of cloud computing device decision information sent by a cloud computing device to a local SDN controller according to an embodiment of the present invention;
fig. 10 is a schematic diagram of a transmission link establishment process for requesting data processing by a cloud computing device according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of an electronic device for controlling an SDN-based internet of things fog computing network system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
fig. 1 is a schematic diagram of an SDN-based internet of things fog computing network system according to an embodiment of the present invention, and as shown in fig. 1, an SDN-based internet of things fog computing network system provided in an embodiment of the present invention includes:
a local subnetwork, a fog computing device, a distributed SDN controller, and a cloud computing device;
the local sub-network is interconnected between the fog computing device, between the fog computing device and the distributed SDN controller, and between the distributed SDN controller and the cloud computing device;
the local sub-network comprises data acquisition equipment, controlled equipment and a local SDN controller, wherein the data acquisition equipment and the controlled equipment are respectively connected with the local SDN controller, the data acquisition equipment is used for acquiring data to be processed, the local SDN controller is used for analyzing the data to be processed and judging whether the data to be processed needs to be sent to the fog computing equipment or the cloud computing equipment for processing, and the controlled equipment is used for executing a control instruction fed back by the local SDN controller;
the fog computing equipment is used for processing the data to be processed;
the distributed SDN controller is used for monitoring the use state of the fog computing device, verifying the received request information sent by the local SDN controller, and sending request confirmation information to the fog computing device and the local SDN controller;
the cloud computing equipment is used for processing the data to be processed.
Specifically, a Software Defined Network (SDN) is a novel network architecture, which is a scientific research project proposed and hosted by a professor of stanford university in 2004, and SDN aims to change the existing network architecture with complex and multi-protocol standards, and a new internet communication mode is expected to be created. The method is mainly characterized by centralized control, decoupling of numerical control planes and a unified programming interface. The management personnel can configure the routing forwarding rule of the network in a self-defined mode through a uniform programming interface, and the network equipment realizes centralized control due to decoupling of a data forwarding plane and a control plane, can quickly and conveniently deploy specific tasks to equipment in a control domain, reduces maintenance cost and shortens deployment period.
By applying an SDN structure system in the Internet of things, the working condition of equipment in the whole control domain can be monitored more comprehensively, and through the monitoring decision-making capability of an SDN controller, network bandwidth can be dynamically allocated and network flow can be dredged; in addition, the SDN controller can also help to judge and authenticate the transmission of the underlying data between the Internet of things architectures, and can provide safety guarantee for the transmitted data.
The SDN-based Internet of things fog computing network system provided by the embodiment of the invention can virtualize a cost-location network layer, a fog computing device layer, a distributed SDN controller layer and a cloud computing device layer.
The local network layer comprises at least one local sub-network, each local sub-network comprises a data acquisition device, a controlled device and a local SDN controller, the local sub-network can be a local network of a factory, a school, a hospital or other units, the data acquisition device comprises various sensors, various mobile devices temporarily accessing the local sub-network or a P L C device, the local SDN controller completes information aggregation and manages flow, the local SDN controller can be mounted on a local server, the local server has basic data processing capacity, and when data processing services are not required to be provided by other networks except the local sub-network, the local server processes data of the local sub-network.
The data acquisition equipment and the controlled equipment in the local sub-network are respectively connected with the local SDN controller, and the connection mode can be a wired connection (Ethernet and the like) or a wireless transmission (Bluetooth, zigbee, wifi, GPRS/3G/4G/5G) mode.
The fog computing device layer comprises at least one fog computing device, and each fog computing device can be connected with each other in a wired or wireless mode. The fog computing devices may be servers located at the edge of the internet, distributed at the edge of the internet, closer to the local network layer than the cloud computing device layer. These servers have data computation and processing capabilities that are superior to local servers, enabling more complex computations. The local network layer determines whether to submit the data to the fog computing device layer for processing through a decision of the local SDN controller.
A distributed SDN controller layer (zone controller) is located between the cloud computing device layer and the underlying fog computing device layer. The distributed SDN controller layer comprises at least one distributed SDN controller, each fog computing device can be connected with each other in a wired or wireless mode, the fog computing devices are mainly used for managing the fog computing device layer at the edge of the network, monitoring the performance of the fog computing device layer, facilitating message passing among different fog computing device layers and serving as an authentication broker of the whole network.
The cloud computing device layer comprises at least one cloud computing device, wherein a main controller of the whole SDN framework runs in the cloud computing device, the controller manages all distributed controllers and manages message security authentication of the whole network. In addition, the cloud computing device layer also receives data from the local network layer, and utilizes the powerful data computing and analyzing capability of the cloud computing device to help decision making and returning.
The local network layer and the fog computing device layer, the fog computing device layer and the distributed SDN controller layer, and the distributed SDN controller layer and the cloud computing device layer may be connected with each other in a wired or wireless manner.
According to the SDN-based fog calculation network system of the Internet of things, the access equipment is classified and authenticated and the data to be processed is classified and processed through classification of the network system, so that the safety of a network is guaranteed, the data processing efficiency is improved, and the utilization rate of network resources is improved.
Example 2:
fig. 2 is a schematic diagram of a control method of an SDN-based internet of things fog computing network system according to an embodiment of the present invention, and as shown in fig. 2, an embodiment of the present invention provides a method for controlling an SDN-based internet of things fog computing network system in the foregoing embodiment, including:
step S10, the local SDN controller judges whether the local sub-network can process the data to be processed according to the data type of the data to be processed, and if the local sub-network judges that the data to be processed cannot be processed, request information for using first fog computing equipment is sent to the first distributed SDN controller;
step S20, the first distributed SDN controller sending request confirmation information for using the first fog computing device to the local SDN controller and the first fog computing device according to the request information for using the first fog computing device;
step S30, the local SDN controller sending data processing request information to the first fog computing device according to the request confirmation information of the first fog computing device;
and step S40, the first fog computing equipment processes the data to be processed according to the data processing request information.
The data acquisition equipment in the local sub-network is used for acquiring data to be processed, namely, the data acquisition equipment acquires data through various types of terminal sensors and P L C, the sensors are various in types, the local sub-network is taken as an example of a local area network of a factory, various data can be acquired for the same product on a production line, the types of the data are selected according to the production requirements of the factory, common sensors include but are not limited to a temperature sensor, a humidity sensor and an air quality sensor, and the acquired data include but are not limited to the working state (starting up, running, maintaining, stopping and checking), the production time, the current product model, the yield, the ambient temperature, the humidity and the like.
After the sensors and the P L C collect their respective data, the data to be processed is transmitted to the local SDN controller at the local network layer in any one or more of a plurality of manners, such as wired, wireless, exchange and interworking.
The method comprises the steps that factory-defined data processing rules are stored in a local SDN controller, whether the data processing capacity of a local sub-network can complete a processing task of to-be-processed data is judged by examining the data types, and if the data processing capacity of the local sub-network cannot complete the processing task of the to-be-processed data is judged, request information for using first fog computing equipment is sent to a first distributed SDN controller.
After receiving the request information using the first fog computing device, the first distributed SDN controller sends request confirmation information using the first fog computing device to the local SDN controller and the first fog computing device.
After receiving the request confirmation information of using the first fog computing device, the local SDN controller sends data processing request information to the first fog computing device, wherein the data processing request information contains data to be processed.
And after receiving the data processing request information, the first fog computing equipment processes the data to be processed.
Further, the request confirmation information using the first fog computing device includes an access credential.
Specifically, after receiving request information for using the first cloud computing device, which is sent by the local SDN controller, the first distributed SDN controller provides platform access authentication for the local SDN controller.
Each distributed SDN controller is a node that has been authenticated by a master SDN controller in the cloud computing device, which is given the authority to authenticate underlying node access and fog computing device invocation. The distributed SDN controllers receive request information from a local SDN controller, and after the correctness of the identity is verified, an optimal fog computing device is distributed to the distributed SDN controllers according to the use state of the current fog computing device and the current communication link state; the distributed SDN controller may send a pair of access credentials to the local SDN controller and the assigned fog computing device for access authentication of both, the access credentials included in the request acknowledgement information using the first fog computing device. After receiving the access certificate, the local SDN controller sends data processing request information to the fog computing device, applies for connection establishment, and transmits data to be processed.
Fig. 3 is a schematic structural diagram of data processing request information sent by a local SDN controller to a fog computing device according to an embodiment of the present invention, where the data processing request information includes a local subnetwork ID, a data collection device ID, a data type of data to be processed, a processing priority, an access certificate, and the data to be processed, as shown in fig. 3.
Further, the method further comprises:
after the first fog computing device processes the data to be processed, fog computing device decision information is obtained, and the fog computing device decision information is sent to the local SDN controller;
the local SDN controller sends a control instruction to the controlled device according to the fog computing device decision information to instruct the controlled device to execute the control instruction.
Specifically, the fog computing device runs data decision software selected by a local sub-network, and after receiving data processing request information sent by a local SDN controller, the fog computing device calculates and analyzes the working state and progress of devices in the local sub-network according to the data processing request information, makes a relevant decision result, and sends the decision result to the local SDN controller in the form of fog computing device decision information. After receiving the fog computing device decision information, the local SDN controller sends a control instruction to the controlled device to instruct the controlled device to execute the control instruction.
Further, the fog computing device decision information carries at least a controlled device ID.
Specifically, fig. 4 is a schematic structural diagram of fog computing device decision information sent by a fog computing device to a local SDN controller according to an embodiment of the present invention, and as shown in fig. 4, the fog computing device decision information includes a local subnet ID, a controlled device ID, a data type of data to be processed, a processing priority, a fog computing device processing identifier, and a fog computing device decision result, where a value of the fog computing device processing identifier is "normal" and indicates that the fog computing device decision information carries the fog computing device decision result.
The decision information of the fog computing equipment comprises the ID of the controlled equipment, so that the specific controlled equipment can be controlled in a more targeted manner, and the control effect is more accurate.
Fig. 5 is a schematic diagram of a transmission link establishment procedure for requesting data processing by the fog computing device according to an embodiment of the present invention, and fig. 5 shows the transmission link establishment procedure of the method.
Further, the method further comprises:
the local SDN controller encrypts the request information for using the first fog computing device.
Specifically, before a local sub-network is accessed to a fog computing device, a local SDN controller needs to encrypt request information using a first fog computing device, an encryption key is included in the request information using the first fog computing device, a first distributed SDN controller needs to verify the legitimacy of an accessed local network layer, the first distributed SDN controller verifies the request information using the first fog computing device, the request information using the first fog computing device at least includes a local sub-network ID, a data acquisition device ID, a data type of data to be processed, a processing priority, a secret key and the like, the first distributed SDN controller judges whether the request using the first fog computing device is legal or not according to the local sub-network ID, the data acquisition device ID and the secret key, and only when the request information is legal, the first distributed SDN controller sends the request information using the first fog computing device to the first fog computing device and the local SDN controller respectively The request for the computing device confirms the information. By adopting the identity authentication measure, the attack of the virus on the fog computing equipment and the cloud computing equipment is avoided, and the safety is improved.
According to the control method of the SDN-based fog computing network system of the Internet of things, the access equipment is classified and authenticated and the data to be processed is classified and processed through classification of the network system, so that the safety of the network is guaranteed, the data processing efficiency is improved, and the utilization rate of network resources is improved.
Example 3:
this embodiment is basically the same as embodiment 2, and for the sake of brevity of description, in the description process of this embodiment, the technical features same as those of embodiment 2 are not described again, and only the differences between this embodiment and embodiment 2 are explained:
further, the processing, by the first fog calculating device, the to-be-processed data according to the data processing request information specifically includes:
the first fog computing equipment judges whether the first fog computing equipment can process the data to be processed according to the data processing request information;
if the data to be processed can be processed by the data processing device, processing the data to be processed;
if the data to be processed cannot be processed by the first distributed SDN controller, sending request information for using second fog computing equipment to the first distributed SDN controller;
the first distributed SDN controller sends request confirmation information of using the second fog computing device to the second fog computing device according to the request information of using the second fog computing device;
the first fog computing device sending the data processing request information to the second fog computing device;
and the second fog computing equipment processes the data to be processed in cooperation with the first fog computing equipment according to the request confirmation information using the second fog computing equipment.
Specifically, before the first fog computing device obtains the fog computing device decision information, the first fog computing device needs to determine whether the data processing capability of the first fog computing device can complete the processing task of the data to be processed according to the data processing request information.
When the requested data to be processed is relatively simple, the data processing capacity of the first fog computing device can complete the processing task of the data to be processed, and then the data to be processed is processed.
When the requested to-be-processed data is complex and the data processing capacity of the first fog computing device cannot complete the processing task of the to-be-processed data, sending request information for using a second fog computing device to a first distributed SDN controller; in this embodiment, the second fog computing device is a fog computing device under the control of the first distributed SDN controller.
After receiving the request information for using the second fog computing device, the first distributed SDN controller sends request confirmation information for using the second fog computing device to the second fog computing device according to the request information for using the second fog computing device;
then, the first fog computing device sends the data processing request information to the second fog computing device;
and the first fog computing equipment and the second fog computing equipment perform cooperative processing on the data to be processed.
Figure 6 is a schematic diagram of the structure of request information sent by a first fog computing device to a first distributed SDN controller using a second fog computing device in accordance with an embodiment of the invention, as shown in fig. 6, the request information using the second fog computing device includes a first fog computing device ID, a first distributed SDN controller ID, a second fog computing device ID, a second distributed SDN controller ID, an access certificate, and data to be processed, in this configuration, a first distributed SDN controller ID corresponds to a first fog computing device ID, the first distributed SDN controller represents a distributed SDN controller that controls the first fog computing device, a second distributed SDN controller ID corresponds to a second fog computing device ID, and the second distributed SDN controller represents a distributed SDN controller that controls the second fog computing device.
Fig. 7 is a schematic diagram of a first transmission link establishment procedure for requesting the second mist computing device to cooperate for data processing according to an embodiment of the present invention, and as shown in fig. 7, the first transmission link establishment procedure of the method is shown.
According to the control method of the SDN-based fog computing network system of the Internet of things, the access equipment is classified and authenticated and the data to be processed is classified and processed through classification of the network system, so that the safety of the network is guaranteed, the data processing efficiency is improved, and the utilization rate of network resources is improved.
Example 4:
this embodiment is basically the same as embodiment 3, and for the sake of brevity of description, in the description process of this embodiment, the same technical features as embodiment 3 are not described again, and only differences between this embodiment and embodiment 3 are explained:
further, the sending, by the first distributed SDN controller, the request confirmation information for using the second fog computing device to the second fog computing device according to the request information for using the second fog computing device specifically includes:
the first distributed SDN controller judges whether the second fog computing device is in the monitoring range of the first distributed SDN controller according to the request information of the second fog computing device;
if the monitoring range is judged to be within the monitoring range, sending request confirmation information for using the second fog computing equipment to the second fog computing equipment;
if the second fog computing device is judged to be out of the monitoring range, sending request confirmation information for using the second fog computing device to a second distributed SDN controller to which the second fog computing device belongs;
sending, by the second distributed SDN controller, the request acknowledgement information for using the second fog computing device to the second fog computing device.
Specifically, after the first distributed SDN controller receives the request information for using the second fog computing device, before sending the request confirmation information for using the second fog computing device to the second fog computing device according to the request information for using the second fog computing device, it is necessary to determine whether the second fog computing device belongs to the control range of the second fog computing device according to the request information for using the second fog computing device.
If it is determined that the second fog calculating device belongs to the fog calculating device within the control range of the second fog calculating device, sending request confirmation information for using the second fog calculating device to the second fog calculating device according to the request information for using the second fog calculating device, where the specific process is described in embodiment 3 above, and is not described here again.
If the fact that the second fog computing device does not belong to the fog computing device within the control range of the second fog computing device is judged and obtained, sending request confirmation information for using the second fog computing device to a second distributed SDN controller to which the second fog computing device belongs;
and sending, by the second distributed SDN controller, request acknowledgement information to the second fog computing device to use the second fog computing device.
Fig. 8 is a schematic diagram of a second transmission link establishment procedure for requesting the second fog computing device to cooperate for data processing according to the embodiment of the present invention, and as shown in fig. 8, the second transmission link establishment procedure is the transmission link establishment procedure of the method described above.
According to the control method of the SDN-based fog computing network system of the Internet of things, the access equipment is classified and authenticated and the data to be processed is classified and processed through classification of the network system, so that the safety of the network is guaranteed, the data processing efficiency is improved, and the utilization rate of network resources is improved.
Example 5:
this embodiment is basically the same as embodiments 2, 3 or 4, and for the sake of brevity of description, in the description process of this embodiment, the technical features the same as those of embodiments 2, 3 or 4 are not described again, and only differences between this embodiment and embodiments 2, 3 or 4 are explained:
further, the sending, by the local SDN controller, the control instruction to the controlled device according to the fog computing device decision information specifically includes:
the local SDN controller judges whether cloud computing equipment is required to process the data to be processed or not according to the fog computing equipment decision information;
if the fact that the cloud computing equipment is not required to process the data to be processed is judged and obtained, a control instruction is sent to the controlled equipment according to the decision information of the fog computing equipment;
if the fact that the cloud computing equipment needs to process the data to be processed is judged and obtained, sending the data processing request information to the cloud computing equipment;
the cloud computing equipment processes the data to be processed according to the data processing request information to obtain cloud computing equipment decision information, and sends the cloud computing equipment decision information to the local SDN controller;
and the local SDN controller sends a control instruction to the controlled equipment according to the cloud computing equipment decision information.
Specifically, before the local SDN controller sends control information to the controlled device according to the fog computing device decision information, it needs to determine whether the cloud computing device needs to process the to-be-processed data according to the fog computing device decision information, specifically, it needs to determine whether the cloud computing device needs to process the to-be-processed data according to a value of a fog computing device processing identifier in the fog computing device decision information, when the value of the fog computing device processing identifier is "normal", it indicates that the fog computing device decision information carries a fog computing device decision result, the cloud computing device is not needed to process the to-be-processed data, and when the value of the fog computing device processing identifier is "unhandle", it indicates that the fog computing device decision information does not carry a fog computing device decision result, the cloud computing device needs to process the to-be-processed data.
If it is determined that the cloud computing device is not required to process the to-be-processed data, sending control information to the controlled device according to the decision information of the fog computing device, where the specific process is specifically described in the above embodiments 2, 3, or 4, and details are not described here.
If the fact that the cloud computing equipment is required to process the data to be processed is judged and obtained, request information for using the cloud computing equipment is sent to the first distributed SDN controller;
sending, by the first distributed SDN controller, the request information for using the cloud computing device to the cloud computing device;
after receiving the request information of using the cloud computing equipment, the cloud computing equipment processes the data to be processed according to the data processing request information to obtain cloud computing equipment decision information, and sends the cloud computing equipment decision information to a local SDN controller; and the local SDN controller sends control information to the controlled equipment according to the cloud computing equipment decision information.
Fig. 9 is a schematic structural diagram of cloud computing device decision information sent by a cloud computing device to a local SDN controller according to an embodiment of the present invention, and as shown in fig. 9, the cloud computing device decision information includes a local sub-network ID, a controlled device ID, a cloud computing device processing identifier, and a cloud computing device decision result. The cloud computing equipment decision information comprises the controlled equipment ID, so that specific controlled equipment can be controlled in a more targeted manner, and the control effect is more accurate.
Fig. 10 is a schematic diagram of a transmission link establishment process for requesting a cloud computing device to perform data processing according to an embodiment of the present invention, and as shown in fig. 10, the transmission link establishment process of the method is described above.
According to the control method of the SDN-based fog computing network system of the Internet of things, the access equipment is classified and authenticated and the data to be processed is classified and processed through classification of the network system, so that the safety of the network is guaranteed, the data processing efficiency is improved, and the utilization rate of network resources is improved.
Example 6:
fig. 11 is a schematic structural diagram of an electronic device for controlling an SDN-based internet of things fog computing network system according to an embodiment of the present invention, and as shown in fig. 11, the electronic device includes: a processor (processor)801, a memory (memory)802, and a bus 803;
wherein, the processor 801 and the memory 802 complete the communication with each other through the bus 803;
the processor 801 is configured to call program instructions in the memory 802 to perform the methods provided by the above-described method embodiments, including, for example:
the method comprises the steps that a local SDN controller judges whether a local sub-network can process data to be processed or not according to the data type of the data to be processed, and if the fact that the data to be processed cannot be processed is judged, request information for using first fog computing equipment is sent to a first distributed SDN controller;
the first distributed SDN controller sends request confirmation information using the first fog computing device to the local SDN controller and the first fog computing device according to the request information using the first fog computing device;
the local SDN controller sends data processing request information to the first fog computing device according to the request confirmation information of the first fog computing device;
and the first fog computing equipment processes the data to be processed according to the data processing request information.
Example 7:
an embodiment of the present invention discloses a computer program product, which includes a computer program stored on a non-transitory computer readable storage medium, the computer program including program instructions, when the program instructions are executed by a computer, the computer can execute the methods provided by the above method embodiments, for example, the method includes:
the method comprises the steps that a local SDN controller judges whether a local sub-network can process data to be processed or not according to the data type of the data to be processed, and if the fact that the data to be processed cannot be processed is judged, request information for using first fog computing equipment is sent to a first distributed SDN controller;
the first distributed SDN controller sends request confirmation information using the first fog computing device to the local SDN controller and the first fog computing device according to the request information using the first fog computing device;
the local SDN controller sends data processing request information to the first fog computing device according to the request confirmation information of the first fog computing device;
and the first fog computing equipment processes the data to be processed according to the data processing request information.
Example 8:
embodiments of the present invention provide a non-transitory computer-readable storage medium, which stores computer instructions, where the computer instructions cause the computer to perform the methods provided by the above method embodiments, for example, the methods include:
the method comprises the steps that a local SDN controller judges whether a local sub-network can process data to be processed or not according to the data type of the data to be processed, and if the fact that the data to be processed cannot be processed is judged, request information for using first fog computing equipment is sent to a first distributed SDN controller;
the first distributed SDN controller sends request confirmation information using the first fog computing device to the local SDN controller and the first fog computing device according to the request information using the first fog computing device;
the local SDN controller sends data processing request information to the first fog computing device according to the request confirmation information of the first fog computing device;
and the first fog computing equipment processes the data to be processed according to the data processing request information.
Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
The above-described embodiments of the apparatuses and devices are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. An SDN-based Internet of things fog computing network system is characterized by comprising:
a local subnetwork, a fog computing device, a distributed SDN controller, and a cloud computing device;
the local sub-network is interconnected between the fog computing device, between the fog computing device and the distributed SDN controller, and between the distributed SDN controller and the cloud computing device;
the local sub-network comprises data acquisition equipment, controlled equipment and a local SDN controller, wherein the data acquisition equipment and the controlled equipment are respectively connected with the local SDN controller, the data acquisition equipment is used for acquiring data to be processed, the local SDN controller is used for analyzing the data to be processed and judging whether the data to be processed needs to be sent to the fog computing equipment or the cloud computing equipment for processing, and the controlled equipment is used for executing a control instruction fed back by the local SDN controller;
the fog computing equipment is used for processing the data to be processed;
the distributed SDN controller is used for monitoring the use state of the fog computing device, verifying the received request information sent by the local SDN controller, and sending request confirmation information to the fog computing device and the local SDN controller;
the cloud computing equipment is used for processing the data to be processed.
2. A control method based on the system of claim 1, comprising:
the method comprises the steps that a local SDN controller judges whether a local sub-network can process data to be processed or not according to the data type of the data to be processed, and if the fact that the data to be processed cannot be processed is judged, request information for using first fog computing equipment is sent to a first distributed SDN controller;
the first distributed SDN controller sends request confirmation information using the first fog computing device to the local SDN controller and the first fog computing device according to the request information using the first fog computing device;
the local SDN controller sends data processing request information to the first fog computing device according to the request confirmation information of the first fog computing device;
and the first fog computing equipment processes the data to be processed according to the data processing request information.
3. The method of claim 2, wherein the request confirmation information using the first mist computing device comprises an access credential.
4. The method of claim 2, further comprising:
after the first fog computing device processes the data to be processed, fog computing device decision information is obtained, and the fog computing device decision information is sent to the local SDN controller;
the local SDN controller sends a control instruction to the controlled device according to the fog computing device decision information to instruct the controlled device to execute the control instruction.
5. The method according to claim 2, wherein the processing of the data to be processed by the first fog computing device according to the data processing request information is specifically:
the first fog computing equipment judges whether the first fog computing equipment can process the data to be processed according to the data processing request information;
if the data to be processed can be processed by the data processing device, processing the data to be processed;
if the data to be processed cannot be processed by the first distributed SDN controller, sending request information for using second fog computing equipment to the first distributed SDN controller;
the first distributed SDN controller sends request confirmation information of using the second fog computing device to the second fog computing device according to the request information of using the second fog computing device;
the first fog computing device sending the data processing request information to the second fog computing device;
and the second fog computing equipment processes the data to be processed in cooperation with the first fog computing equipment according to the request confirmation information using the second fog computing equipment.
6. The method of claim 5, wherein sending, by the first distributed SDN controller, request acknowledgement information for using the second fog computing device to the second fog computing device according to the request information for using the second fog computing device is specifically:
the first distributed SDN controller judges whether the second fog computing device is in the monitoring range of the first distributed SDN controller according to the request information of the second fog computing device;
if the monitoring range is judged to be within the monitoring range, sending request confirmation information for using the second fog computing equipment to the second fog computing equipment;
if the second fog computing device is judged to be out of the monitoring range, sending request confirmation information for using the second fog computing device to a second distributed SDN controller to which the second fog computing device belongs;
sending, by the second distributed SDN controller, the request acknowledgement information for using the second fog computing device to the second fog computing device.
7. The method of claim 4, wherein sending, by the local SDN controller, a control instruction to the controlled device according to the fog computing device decision information is specifically:
the local SDN controller judges whether cloud computing equipment is required to process the data to be processed or not according to the fog computing equipment decision information;
if the fact that the cloud computing equipment is not required to process the data to be processed is judged and obtained, a control instruction is sent to the controlled equipment according to the decision information of the fog computing equipment;
if the fact that the cloud computing equipment needs to process the data to be processed is judged and obtained, sending the data processing request information to the cloud computing equipment;
the cloud computing equipment processes the data to be processed according to the data processing request information to obtain cloud computing equipment decision information, and sends the cloud computing equipment decision information to the local SDN controller;
and the local SDN controller sends a control instruction to the controlled equipment according to the cloud computing equipment decision information.
8. The method of claim 2, wherein the fog computing device decision information carries at least a controlled device ID.
9. The method according to any one of claims 2-8, further comprising:
the local SDN controller encrypts the request information for using the first fog computing device.
10. An electronic device for controlling an SDN-based internet of things fog computing network system, comprising:
the processor and the memory are communicated with each other through a bus; the memory stores program instructions executable by the processor, the processor invoking the program instructions to perform the method of any of claims 2 to 9.
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