CN110830585B - Internet of things system and communication method thereof - Google Patents
Internet of things system and communication method thereof Download PDFInfo
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- CN110830585B CN110830585B CN201911110981.4A CN201911110981A CN110830585B CN 110830585 B CN110830585 B CN 110830585B CN 201911110981 A CN201911110981 A CN 201911110981A CN 110830585 B CN110830585 B CN 110830585B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/44—Star or tree networks
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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
- H04L63/02—Network architectures or network communication protocols for network security for separating internal from external traffic, e.g. firewalls
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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
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
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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
- H04L63/12—Applying verification of the received information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/66—Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
Abstract
The invention discloses an Internet of things system, which comprises an Internet gateway, a server and a server, wherein the Internet gateway is in communication connection with a user terminal through the Internet; the local area network gateway is used for realizing communication connection between the Internet and the local area network; the intelligent terminals of the internet of things are connected with the local area network gateway in a star topology mode, and meanwhile, the intelligent terminals of different internet of things are connected in a mesh topology mode. The invention can improve the defects of the prior art and improve the communication reliability of the Internet of things system.
Description
Technical Field
The invention relates to the technical field of Internet of things, in particular to an Internet of things system and a communication method thereof.
Background
Along with the popularization of the internet of things and smart homes, more and more smart devices are in communication connection through the internet of things. With the increase of network access devices, how to ensure the security and high efficiency of the internet of things system becomes one of the hot spots of research in this field.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an internet of things system and a communication method thereof, which can solve the defects of the prior art and improve the communication reliability of the internet of things system.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows.
An Internet of things system comprises an Internet of things server,
the internet gateway is in communication connection with the user terminal through the internet;
the local area network gateway is used for realizing communication connection between the Internet and the local area network;
the intelligent terminals of the internet of things are connected with the local area network gateway in a star topology mode, and meanwhile, the intelligent terminals of different internet of things are connected in a mesh topology mode.
A communication method of the Internet of things system comprises the following steps:
A. the user terminal sends the control information to an internet gateway through the internet; the internet gateway encrypts the control information and then sends the control information to the local area network gateway;
B. the local area network gateway screens the encrypted control information, decrypts the legal information and sends the decrypted legal information to the intelligent terminal of the Internet of things;
C. when the internet gateway or the local area network gateway is abnormal, information is directly transmitted between the internet of things intelligent terminals.
Preferably, in the step a, encrypting the control information includes the steps of,
a1, the user terminal generates a random key through a random function;
a2, the Internet gateway uses a one-way hash algorithm to combine the random key and the static key obtained by the Internet gateway to obtain a final key, and the final key is used to encrypt the control information.
Preferably, the step of obtaining the static key is,
a21, classifying according to the address range of the history information received by the Internet gateway;
a22, inputting the address with the largest number into a static function to obtain a static number sequence;
and A23, fitting the static series by using a least square method, and taking the combination of extreme points in the fitting result as a static key.
Preferably, in the step B, the screening of the encrypted control information by the lan gateway includes the following steps,
and performing secondary encryption on the encrypted control information by using the static key, wherein if the information before and after the secondary encryption is linearly related, the control information is legal, and otherwise, the control information is illegal.
Preferably, in the step C, a control center is randomly determined in the internet of things intelligent terminal, and the control center temporarily stores the communication information of all the internet of things intelligent terminals.
Preferably, in the step C, the communication link between the intelligent terminal of the internet of things and the internet gateway and the communication link between the intelligent terminal of the internet of things and the intelligent terminal of the internet of things are independent and physically isolated communication links.
Adopt the beneficial effect that above-mentioned technical scheme brought to lie in: the invention realizes the encryption transmission of communication information by improving the communication architecture of the Internet of things and adopting the design of double gateways. Meanwhile, the linear characteristic and the relatively stable characteristic of the static key are utilized in the encryption process, so that the legality of the encrypted information is checked. When the external communication line breaks down, the intelligent terminal in the Internet of things can realize temporary internal communication maintenance, and meanwhile, the safety in the Internet of things is guaranteed by the physically isolated link, so that the reliability of the Internet of things is improved.
Drawings
FIG. 1 is a block diagram of one embodiment of the present invention.
In the figure: 1. an internet gateway; 2. an internet; 3. a user terminal; 4. a local area network gateway; 5. a local area network; 6. internet of things intelligent terminal.
Detailed Description
Referring to fig. 1, an internet of things system according to an embodiment of the present invention includes,
the internet gateway 1 is in communication connection with the user terminal 3 through the internet 2;
the local area network gateway 4 is used for realizing the communication connection between the Internet 2 and the local area network 5;
and the intelligent terminals 6 of the internet of things are in star topology connection with the local area network gateway 4, and meanwhile, mesh topology connection is formed among the intelligent terminals 6 of different internet of things.
A communication method of the Internet of things system comprises the following steps:
A. the user terminal 3 sends the control information to the internet gateway 1 through the internet 2; the internet gateway 1 encrypts the control information and sends the encrypted control information to the local area network gateway 4;
B. the local area network gateway 4 screens the encrypted control information, decrypts the legal information and sends the decrypted legal information to the intelligent terminal 6 of the internet of things;
C. when the internet gateway 1 or the local area network gateway 4 is abnormal, information is directly transmitted between the internet of things intelligent terminals 6.
In step a, encrypting the control information includes the steps of,
a1, the user terminal 3 generates a random key through a random function;
a2, the Internet gateway 1 uses a one-way hash algorithm to combine the random key and the static key obtained by the Internet gateway 1 to obtain a final key, and the final key is used to encrypt the control information.
The static key is obtained by the steps of,
a21, classifying according to the address range of the history information received by the Internet gateway 1;
a22, inputting the address with the largest number into a static function to obtain a static number sequence;
and A23, fitting the static series by using a least square method, and taking the combination of extreme points in the fitting result as a static key.
In step B, the local area network gateway 4 screening the encrypted control information includes the following steps,
and performing secondary encryption on the encrypted control information by using the static key, wherein if the information before and after the secondary encryption is linearly related, the control information is legal, and otherwise, the control information is illegal.
In the step C, a control center is randomly determined in the intelligent terminals 6 of the Internet of things, and the control center temporarily stores all communication information of the intelligent terminals 6 of the Internet of things.
In the step C, the communication link between the internet of things intelligent terminal 6 and the internet gateway 1 and the communication link between the internet of things intelligent terminal 6 and the internet of things intelligent terminal 6 are independent and physically isolated communication links.
And selecting one intelligent terminal 6 of the internet of things which is in direct communication connection with the control center as a communication information backup unit, randomly replacing another intelligent terminal 6 of the internet of things which is not in direct communication connection with the original control center as a new control center when the control center fails, reading the communication information in the backup unit, and selecting the new backup unit according to the mode.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (2)
1. An Internet of things system and a communication method thereof are characterized in that: the Internet of things system comprises an Internet gateway (1) which is in communication connection with a user terminal (3) through the Internet (2); the local area network gateway (4) is used for realizing the communication connection between the Internet (2) and the local area network (5); the intelligent terminals (6) of the Internet of things are in star-shaped topological connection with the local area network gateway (4), and meanwhile, the intelligent terminals (6) of different Internet of things form mesh-shaped topological connection;
the communication method comprises the following steps:
A. the user terminal (3) sends the control information to the internet gateway (1) through the internet (2); the internet gateway (1) encrypts the control information and then sends the encrypted control information to the local area network gateway (4); the encryption comprises the following steps:
a1, the user terminal (3) generates a random key through a random function;
a2, the internet gateway (1) uses a one-way hash algorithm to combine the random key and the static key obtained by the internet gateway (1) to obtain a final key, and the final key is used to encrypt the control information;
B. the local area network gateway (4) screens the encrypted control information, decrypts the legal information and sends the decrypted legal information to the Internet of things intelligent terminal (6); performing secondary encryption on the encrypted control information by using a static key, wherein if the information before and after the secondary encryption is linearly related, the control information is legal, otherwise, the control information is illegal;
C. when the Internet gateway (1) or the local area network gateway (4) is abnormal, information is directly transmitted between the Internet of things intelligent terminals (6); randomly determining a control center in the intelligent terminals (6) of the Internet of things, and temporarily storing the communication information of all the intelligent terminals (6) of the Internet of things by the control center; the communication link between the intelligent terminal (6) of the Internet of things and the Internet gateway (1) and the communication link between the intelligent terminal (6) of the Internet of things and the intelligent terminal (6) of the Internet of things are mutually independent and have physically isolated communication links.
2. The internet of things system and the communication method thereof according to claim 1, wherein: the static key is obtained in step a2 by,
a21, classifying according to the address range of the history information received by the Internet gateway (1);
a22, inputting the address with the largest number into a static function to obtain a static number sequence;
and A23, fitting the static series by using a least square method, and taking the combination of extreme points in the fitting result as a static key.
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| CN112904734A (en) * | 2020-12-23 | 2021-06-04 | 上海上实龙创智能科技股份有限公司 | Intelligent household appliance control system and method based on Internet of things and block chain double gateways |
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| US20070136592A1 (en) * | 2000-04-12 | 2007-06-14 | Smith Richard A | Wireless internet gateway |
| CN103236153B (en) * | 2013-03-22 | 2016-09-07 | 中感科技有限公司 | Infrared switch system, method of controlling switch |
| CN104125124A (en) * | 2014-07-11 | 2014-10-29 | 京信通信系统（中国）有限公司 | Smart home remote control method, device and system |
| KR101684076B1 (en) * | 2015-03-18 | 2016-12-20 | 문종섭 | A secure Data Communication system between IoT smart devices and a Network gateway under Internet of Thing environment |
| CN106656776A (en) * | 2017-01-20 | 2017-05-10 | 浙江小尤鱼智能技术有限公司 | Home gateway |
| CN109814397A (en) * | 2019-01-10 | 2019-05-28 | 上海全筑新军住宅科技有限公司 | A kind of interactive mode Intelligent household system |
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Application publication date: 20200221 Assignee: Hebei tanmi Technology Co.,Ltd. Assignor: NORTH CHINA University OF SCIENCE AND TECHNOLOGY Contract record no.: X2023980039833 Denomination of invention: A IoT System and Its Communication Method Granted publication date: 20220128 License type: Common License Record date: 20230815 |
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