CN102378357A - Wireless sensor network terminal registration method, terminals, gateway and service platform - Google Patents
Wireless sensor network terminal registration method, terminals, gateway and service platform Download PDFInfo
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- CN102378357A CN102378357A CN2010102584574A CN201010258457A CN102378357A CN 102378357 A CN102378357 A CN 102378357A CN 2010102584574 A CN2010102584574 A CN 2010102584574A CN 201010258457 A CN201010258457 A CN 201010258457A CN 102378357 A CN102378357 A CN 102378357A
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Abstract
The invention discloses a wireless sensor network terminal registration method, terminals, a gateway and a service platform, and aims to relieve registration pressure of the service platform. The registration method comprises the following steps of: initiating registration to the service platform by a wireless sensor network gateway instead of a wireless sensor network terminal in a group mode; and after finishing key agreement with the service platform, distributing obtained group keys to all wireless sensor network terminals in a corresponding group. By the method and devices, registration is performed by taking a group as a unit, the registration process of the wireless sensor network terminals is simplified, and simultaneously, the processing load of the service platform can be reduced, and network interactions are reduced so as to reduce the network traffic.
Description
Technical field
The present invention relates to the Internet of Things application, be specifically related to a kind of wireless sensor network (WirelessSensor Network is called for short WSN) terminal registration method and terminal, gateway and business platform.
Background technology
Telecommunications service are develop rapidly always, but all expenditures in the economic activity derive from social income, and under certain condition, certain expenditure is stable, now, and for interpersonal communication service moves closer to the peak.Near under the saturated situation, the development again of communication must derive from creationary other industries and the industry of incorporating in income, and realization is nibbled other industries, thereby enlarges the ratio in total expenditure.
Under such overall situation, how to expand communication service, how is new power provided for telecommunication industry? Industry is thought; Traditional telecommunication path service mainly is interpersonal service; Following telecommunication industry will expand to people and thing, and thing and thing are hoped the category through extended communication services; With the power that obtains to further develop, the basic point of departure of Here it is Internet of Things.
Professional and the application of development Internet of Things; Must be able to reach interconnected widely, aspect interconnected widely, wireless sensor network has very big advantage; And wireless sensor network also has its weakness; Be exactly the problem that is difficult to solve long-distance transmissions, and this aspect is the strong point of communication network, so the combination of communication network and wireless sensor network is a very important topic.This combination is carried out through gateway exactly.
Through gateway, connect communication network on the one hand, connect wireless sensor network on the one hand; By the business platform unified management, and through open interface, with the data and the ability at each terminal of the wireless sensor network of being managed; Even the ability of telecommunications network and telecommunication service ability; Offer service application, so that can develop more service, being convenient to operator has bigger income.
Above-mentioned gateway, because its location is different, function also difference is very big, on the whole, can gateway be divided into channel pattern, business platform manages terminal pattern and business platform is managed gateway mode.
The transmission node of the gateway of channel pattern in wireless sensor network and business platform or the service application only is used to provide a data passages.
Business platform is managed the gateway of terminal pattern on behalf of data forwarding; Gateway is mail to packet in terminal in the wireless sensor network; Gateway sends to business platform after packet is encapsulated according to the communication protocol between gateway and the business platform; Or send to service application, and business platform or service application data sent bag are transmitted to the terminal after with the encapsulation of the communications protocol between gateway and the terminal according to after the communication protocol between gateway and the service application encapsulation.
Business platform is managed the gateway unified management of gateway mode and all terminals under the wireless sensor network, and business platform can be managed, and also can directly not manage the terminal in each wireless sensor network.
Under these patterns; Especially manage terminal pattern and business platform is managed under the gateway mode at business platform; If all terminals of wireless sensor network all will be registered to business platform, all to carry out key agreement, the whole system pressure ratio is bigger like this; No matter be to gateway or to business platform, still the terminal to wireless sensor network all is a very big pressure.
Summary of the invention
The technical problem that the present invention will solve provides a kind of wireless sensor network terminal registration method and terminal, gateway and business platform, alleviates the licensed pressure of business platform.
For solving the problems of the technologies described above, the invention provides the register method at terminal in a kind of wireless sensor network, comprising:
Wireless sensor network gateway is initiated registration with the mode of group to business platform for the terminal of wireless sensor network, behind the key agreement of completion and business platform, the group key that obtains is handed down to all the wireless sensor network terminals in the corresponding group.
Further; The step that wireless sensor network gateway is initiated registration with the mode of group to business platform for the terminal of wireless sensor network comprises: wireless sensor network gateway is initiated the group registration request to business platform, and in this group registration request, carries group identification; After said business platform is received the group registration request, after judging that said wireless sensor network gateway possesses the group registration ability, carry out key agreement with said wireless sensor network gateway.
Further; Said group is accomplished by said wireless sensor network gateway and business platform and sets up; Comprise: said wireless sensor network gateway sends group to business platform and sets up request, and in this request, carries the identification information at the wireless sensor network terminal that belongs to same group, and said business platform is this group allocation group identification; Accomplish group and set up, return to said wireless sensor network gateway and set up the result; Perhaps said wireless sensor network gateway generated group group id; It sends the identification information of carrying the wireless sensor network terminal that belongs to same group when group sets up request to business platform; And said group identification; After said business platform is received described request, accomplish group and set up, return to said wireless sensor network gateway and set up the result.
Further, said wireless sensor network gateway is before business platform sends group's foundation request, and all wireless sensor network terminals issue request in this group, require the identification information of said wireless sensor network terminal to report oneself.
Further; When new terminal adds the registered wireless sensor network of wireless sensor network gateway administration; The said wireless sensor network gateway new terminal that adds of generation is upgraded to business platform initiation state, and will be somebody's turn to do the new group key that adds the affiliated group in terminal and send to this new adding terminal.
Further, after said group key is received at the wireless sensor network terminal in the group, use said group key to communicate by letter with business platform or communicate by letter with service application.
For solving the problems of the technologies described above, the present invention also provides the register method at terminal in a kind of wireless sensor network, comprising:
When new terminal adds the registered wireless sensor network of wireless sensor network gateway administration; Said wireless sensor network gateway said new adding of generation terminal is upgraded to business platform initiation state, and the group key of group under this terminal is sent to this new adding terminal.
Further, after said group key is received at said terminal, use said group key to communicate by letter with business platform or communicate by letter with service application.
For solving the problems of the technologies described above, the present invention also provides a kind of gateway of realizing the wireless sensor network endpoint registration, comprising: registration initiation module, key negotiation module and group key issue module, wherein:
Said registration initiation module is used for initiating registration with the mode of group to business platform for the terminal of wireless sensor network;
Said key negotiation module is used for carrying out key agreement with business platform, obtains group key;
Said group key issues module, is used for behind the key agreement of said key negotiation module completion and business platform, the group key that obtains being handed down to all the wireless sensor network terminals in the corresponding group.
Further, said registration initiation module is further used for initiating the group registration request to business platform, and in this group registration request, carries group identification.
Further, said gateway comprises that also group sets up module, and it is used for sending group to business platform and sets up request, and sets up the identification information of carrying the wireless sensor network terminal that belongs to same group in the request in group.
Further; Said gateway also comprises the state update module; It is used for when having new terminal to add the wireless sensor network of this gateway administration; In generation,, said new adding terminal upgraded to business platform initiation state, receiving after state that said business platform sends upgrades successful result, and the group key of group under this new adding terminal is sent to this new adding terminal.
For solving the problems of the technologies described above, the present invention also provides a kind of business platform of realizing the wireless sensor network endpoint registration, comprises gateway ability judge module and Registering modules, wherein:
Said gateway ability judge module, be used to receive the group registration request after, after the wireless sensor network gateway that judge to send described request possesses the group registration ability, trigger key negotiation module;
Said Registering modules is used for carrying out key agreement with said wireless sensor network gateway, accomplishes the registration of this group.
Further; Said business platform comprises that also group sets up module, and it is used for after the group that receives the wireless sensor network gateway transmission sets up request, being this group allocation group identification; Accomplish group and set up, return to said wireless sensor network gateway and set up the result; Perhaps, it is used for after the group that receives the wireless sensor network gateway transmission sets up request, accomplishing group and setting up, and returns to said wireless sensor network gateway and sets up the result.
Further, said Registering modules also is used for after receiving the state renewal of initiating at wireless sensor network gateway new adding of generation terminal, revising the login state at this new adding terminal.
For solving the problems of the technologies described above, the present invention also provides a kind of wireless sensor network terminal, comprises group key receiver module and communication module, wherein:
Said group key receiver module is used to receive the group key that wireless sensor network gateway sends;
Said communication module is used to use the group key of group under it, communicates with business platform or service application.
Through the method for the invention and device, be that unit registers with the group, simplified the location registration process at wireless sensor network terminal, can reduce the processing load of business platform simultaneously, reduce network traffics thereby reduce network interaction.
Description of drawings
Fig. 1 is wireless sensor network and communication network configuration diagram;
Fig. 2 is the structural representation of business platform of the present invention and gateway;
Fig. 3 is the flow chart that gateway is set up group in the embodiment of the invention at business platform;
Fig. 4 is the flow chart that gateway is accomplished group registration in the embodiment of the invention at business platform for the terminal;
Fig. 5 is the register flow path figure at the newly-increased terminal of the embodiment of the invention.
Embodiment
Inventive concept of the present invention is: wireless sensor network gateway is initiated registration with the mode of group to business platform for the terminal of wireless sensor network; Behind the key agreement of completion and business platform, the group key that obtains is handed down to all the wireless sensor network terminals in the corresponding group.
The step that wireless sensor network gateway is initiated registration with the mode of group to business platform for the terminal of wireless sensor network comprises: said wireless sensor network gateway is initiated the group registration request to business platform, and in this group registration request, carries group identification; After said business platform is received the group registration request, after judging that said gateway possesses the group registration ability, carry out key agreement with said gateway.
When a wireless sensor network gateway is managed a plurality of group, each group is initiated registration respectively, behind the key agreement of accomplishing with business platform, the group key of this group that obtains is handed down to all the wireless sensor network terminals in this group.
When new terminal adds the registered wireless sensor network of wireless sensor network gateway administration; The said wireless sensor network gateway new terminal that adds of generation is upgraded to business platform initiation state, and the group key of group under this terminal is sent to this new adding terminal.
Communicating by letter with business platform or when communicating by letter with service application, using the group key of its affiliated group, to carry out secure communication with business platform or service application in wireless sensor network terminal in the group.
The foundation of group can be to accomplish when disposing at the wireless sensor network terminal, also can be accomplished by gateway and business platform.When gateway and business platform are set up group; Gateway sends group to business platform and sets up request; And in this request, carry the identification information at the wireless sensor network terminal that belongs to same group; Business platform is this group allocation group identification, accomplishes group and sets up, and returns to gateway and sets up the result; Perhaps by gateway generated group group id, set up in the request in the group that sends to business platform, except the identification information of carrying the wireless sensor network terminal, also carry this group identification, business platform completion group returns to gateway the foundation back and sets up the result.
Describe below in conjunction with accompanying drawing 1 and 2 pairs of whole systems of accompanying drawing.Service application among Fig. 1 is meant: according to the open interface of business platform, and open various application and service.
Business platform is used for each terminal to gateway and wireless sensor network, controls and manages, can the receiving terminal data, and these data are handled, offer concrete Internet of Things and use.Among the present invention, business platform is mainly used in the foundation request of handling group, the request of group registration, and the negotiation of group key.In the communication security of terminal and business platform, business platform can discern group and according to group key, perhaps the key of group key regeneration (according to the key of group key according to certain algorithm generation) carries out secure communication.
Particularly, business platform comprises gateway ability judge module and Registering modules, wherein:
Said gateway ability judge module, be used to receive the group registration request after, after the wireless sensor network gateway that judge to send described request possesses the group registration ability, trigger key negotiation module;
Said Registering modules is used for carrying out key agreement with said wireless sensor network gateway, accomplishes the registration of this group.
Preferably; Said business platform comprises that also group sets up module, and it is used for after the group that receives the wireless sensor network gateway transmission sets up request, being this group allocation group identification; Accomplish group and set up, return to said wireless sensor network gateway and set up the result; Perhaps, it is used for after the group that receives the wireless sensor network gateway transmission sets up request, accomplishing group and setting up, and returns to said wireless sensor network gateway and sets up the result.
Preferably, said Registering modules also is used for after receiving the state renewal of initiating at wireless sensor network gateway new adding of generation terminal, revising the login state at this new adding terminal.
Wireless sensor network gateway provides network channel for the wireless sensor network terminal on the one hand, and management function is provided on the other hand.Gateway described in the present invention is meant that mainly business platform manages the gateway of gateway mode, and group creating, group registration, group key agreement mainly are provided, and function such as group key distribution.
Particularly, wireless sensor network gateway comprises: registration initiation module, key negotiation module and group key issue module, wherein:
Said registration initiation module is used for initiating registration with the mode of group to business platform for the terminal of wireless sensor network;
Said key negotiation module is used for carrying out key agreement with business platform, obtains group key;
Said group key issues module, is used for behind the key agreement of said key negotiation module completion and business platform, the group key that obtains being handed down to all the wireless sensor network terminals in the corresponding group.
Preferably, said registration initiation module is further used for initiating the group registration request to business platform, and in this group registration request, carries group identification.
Preferably, said gateway comprises that also group sets up module, and it is used for sending group to business platform and sets up request, and sets up the identification information of carrying the wireless sensor network terminal that belongs to same group in the request in group.
Preferably; Said gateway also comprises: the state update module; It is used for when having new terminal to add the wireless sensor network of this gateway administration; In generation,, said new adding terminal upgraded to business platform initiation state, receiving after state that said business platform sends upgrades successful result, and the group key of group under this new adding terminal is sent to this new adding terminal.
Wireless sensor network terminal among Fig. 1 is arranged in wireless sensor network; By the terminal of business platform management; Be the picker of various sensing datas, among the present invention, be mainly used in to gateway nodal information is provided; Receive group key, and carry out secure communication according to group key and business platform or service application.
Particularly, the wireless sensor network terminal comprises group key receiver module and communication module, wherein:
Said group key receiver module is used to receive the group key that wireless sensor network gateway sends;
Said communication module is used to use the group key of group under it, communicates with business platform or service application.
Below in conjunction with accompanying drawing and specific embodiment the present invention is described further.
Before gateway was initiated group registration, business platform possibly have all interconnected wireless sensor network terminal information of this gateway, and for having divided group in these terminals, in this case, did not just need to have set up group again.Only explain that below gateway sets up the flow process of group, as shown in Figure 3, may further comprise the steps:
Step 301: gateway all wireless sensor network terminals in certain group issue request, require each terminal to report identification information separately;
If wireless sensor network is supported broadcast mode, gateway can issue request through broadcast mode.
Step 302: the own identification information of wireless sensor network terminal to report is given gateway, and gateway is accomplished collection work;
, the wireless sensor network terminal divided group when disposing, the then no longer collection operation of execution in step 301 and step 302 of gateway.Even if but divided group in advance, gateway is acquisition of information again also, can prevent that the wireless sensor network terminal from changing after deployment.
Step 303: gateway is initiated group and is set up request, carries all terminal identity identification informations in the group in the request;
Gateway can oneself generate a unique group identification and send to business platform through group's request of setting up, and also can receive that group sets up the request back and distributes by business platform.
Step 304: business platform is set up group, returns group and sets up result's (like success or failure).
Fig. 4 is the process of gateway completion group registration, may further comprise the steps:
Step 401: gateway is initiated the group registration request to business platform, carries group identification in the register requirement;
Step 402: business platform inspection gateway association attributes, as check whether this gateway has the group registration ability, to judge whether carrying out group registration, if inspection is passed through, then execution in step 403, otherwise, return the result of registration failure to gateway;
Step 403: business platform is registered the terminal in this group, issues the group key of this group to gateway, after gateway is known the group key of this group, accomplishes this group registration;
Business platform issues group key to gateway can adopt one of following mode: business platform and gateway arranging key, and gateway is known the key of this group after consulting to accomplish; Business platform directly issues key to gateway.
Specifically how to generate key, and select what AES, not within limit of consideration of the present invention.
The registration that business platform carries out terminal in this group comprises the authentication at terminal in the group etc.
Step 404: business platform is designated the login state at the wireless sensor network terminal in this group registered after the registration of accomplishing this group;
Step 405: gateway sends the message that succeeds in registration to the wireless sensor network terminal, wherein carries key information;
Step 404 and step 405 execution sequence are not limit.
Step 406: after the wireless sensor network terminal receives said message, preserve key information wherein, and oneself state is revised as accomplishes registration.
The wireless sensor network terminal uses the group identification of its affiliated group and group key to communicate by letter with business platform or communicate by letter with service application, to realize secure communication after obtaining key.
Add a certain set up and when registering the wireless sensor network of completion, register flow path is as shown in Figure 5, may further comprise the steps as new wireless sensor network terminal:
Step 501: new terminal adds the wireless sensor network of this wireless sensor network gateway administration;
Step 502: gateway upgrades to business platform initiation state, carries group identification in the request;
When the terminal under the gateway belonged to a plurality of group, gateway can be confirmed the group under it according to information such as the classification at this new adding terminal or attributes, and in state upgrades, carries the group identification of this group.
Step 503: the group under this new adding terminal of business platform record, and revise the login state (is registered with the status modifier at this terminal) at this terminal, upgrade the result to the gateway return state;
Step 504: gateway sends to this initiate terminal with key information;
Step 505: after key information is received at this terminal, preserve key information.
The group key of group under it is used, to realize secure communication in this terminal when communicating by letter with business platform or communicating by letter with service application.
One of ordinary skill in the art will appreciate that all or part of step in the said method can instruct related hardware to accomplish through program, said program can be stored in the computer-readable recording medium, like read-only memory, disk or CD etc.Alternatively, all or part of step of the foregoing description also can use one or more integrated circuits to realize.Correspondingly, each module in the foregoing description can adopt the form of hardware to realize, also can adopt the form of software function module to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.
Certainly; The present invention also can have other various embodiments; Under the situation that does not deviate from spirit of the present invention and essence thereof; Those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (16)
1. the register method at terminal in the wireless sensor network comprises:
Wireless sensor network gateway is initiated registration with the mode of group to business platform for the terminal of wireless sensor network, behind the key agreement of completion and business platform, the group key that obtains is handed down to all the wireless sensor network terminals in the corresponding group.
2. the method for claim 1 is characterized in that:
The step that wireless sensor network gateway is initiated registration with the mode of group to business platform for the terminal of wireless sensor network comprises: wireless sensor network gateway is initiated the group registration request to business platform, and in this group registration request, carries group identification;
After said business platform is received the group registration request, after judging that said wireless sensor network gateway possesses the group registration ability, carry out key agreement with said wireless sensor network gateway.
3. according to claim 1 or claim 2 method is characterized in that:
Said group is accomplished by said wireless sensor network gateway and business platform and sets up, and comprising:
Said wireless sensor network gateway sends group to business platform and sets up request; And in this request, carry the identification information at the wireless sensor network terminal that belongs to same group; Said business platform is this group allocation group identification; Accomplish group and set up, return to said wireless sensor network gateway and set up the result; Perhaps
Said wireless sensor network gateway generated group group id; It sends the identification information of carrying the wireless sensor network terminal that belongs to same group when group sets up request to business platform; And said group identification; After said business platform is received described request, accomplish group and set up, return to said wireless sensor network gateway and set up the result.
4. method as claimed in claim 3 is characterized in that:
Said wireless sensor network gateway is before business platform sends group's foundation request, and all wireless sensor network terminals issue request in this group, require the identification information of said wireless sensor network terminal to report oneself.
5. the method for claim 1 is characterized in that:
When new terminal adds the registered wireless sensor network of wireless sensor network gateway administration; The said wireless sensor network gateway new terminal that adds of generation is upgraded to business platform initiation state, and will be somebody's turn to do the new group key that adds the affiliated group in terminal and send to this new adding terminal.
6. like claim 1 or 5 described methods, it is characterized in that:
After said group key is received at wireless sensor network terminal in the group, use said group key to communicate by letter with business platform or communicate by letter with service application.
7. the register method at terminal in the wireless sensor network comprises:
When new terminal adds the registered wireless sensor network of wireless sensor network gateway administration; Said wireless sensor network gateway said new adding of generation terminal is upgraded to business platform initiation state, and the group key of group under this terminal is sent to this new adding terminal.
8. method as claimed in claim 7 is characterized in that:
After said group key is received at said terminal, use said group key to communicate by letter with business platform or communicate by letter with service application.
9. gateway of realizing the wireless sensor network endpoint registration comprises: registration initiation module, key negotiation module and group key issue module, wherein:
Said registration initiation module is used for initiating registration with the mode of group to business platform for the terminal of wireless sensor network;
Said key negotiation module is used for carrying out key agreement with business platform, obtains group key;
Said group key issues module, is used for behind the key agreement of said key negotiation module completion and business platform, the group key that obtains being handed down to all the wireless sensor network terminals in the corresponding group.
10. gateway as claimed in claim 9 is characterized in that:
Said registration initiation module is further used for initiating the group registration request to business platform, and in this group registration request, carries group identification.
11. gateway as claimed in claim 9 is characterized in that:
Said gateway comprises that also group sets up module, and it is used for sending group to business platform and sets up request, and sets up the identification information of carrying the wireless sensor network terminal that belongs to same group in the request in group.
12. gateway as claimed in claim 9 is characterized in that:
Said gateway also comprises the state update module; It is used for when having new terminal to add the wireless sensor network of this gateway administration; Upgrade to business platform initiation state for said new adding terminal; Receiving after state that said business platform sends upgrades successful result, the group key of group under this new adding terminal is being sent to this new adding terminal.
13. a business platform of realizing the wireless sensor network endpoint registration comprises gateway ability judge module and Registering modules, wherein:
Said gateway ability judge module, be used to receive the group registration request after, after the wireless sensor network gateway that judge to send described request possesses the group registration ability, trigger key negotiation module;
Said Registering modules is used for carrying out key agreement with said wireless sensor network gateway, accomplishes the registration of this group.
14. business platform as claimed in claim 13 is characterized in that:
Said business platform comprises that also group sets up module, and it is used for after the group that receives the wireless sensor network gateway transmission sets up request, being this group allocation group identification, accomplishes group and sets up, and returns to said wireless sensor network gateway and sets up the result; Perhaps, it is used for after the group that receives the wireless sensor network gateway transmission sets up request, accomplishing group and setting up, and returns to said wireless sensor network gateway and sets up the result.
15. business platform as claimed in claim 13 is characterized in that:
Said Registering modules also is used for after receiving the state renewal of initiating at wireless sensor network gateway new adding of generation terminal, revising the login state at this new adding terminal.
16. a wireless sensor network terminal comprises group key receiver module and communication module, wherein:
Said group key receiver module is used to receive the group key that wireless sensor network gateway sends;
Said communication module is used to use the group key of group under it, communicates with business platform or service application.
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| CN2010102584574A CN102378357A (en) | 2010-08-17 | 2010-08-17 | Wireless sensor network terminal registration method, terminals, gateway and service platform |
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| CN2010102584574A CN102378357A (en) | 2010-08-17 | 2010-08-17 | Wireless sensor network terminal registration method, terminals, gateway and service platform |
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| CN108512679A (en) * | 2017-02-27 | 2018-09-07 | 华为技术有限公司 | A kind of management method and device of gateway device |
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| CN110351727A (en) * | 2019-07-05 | 2019-10-18 | 北京邮电大学 | A kind of certifiede-mail protocol method suitable for wireless sensor network |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103517402A (en) * | 2012-06-25 | 2014-01-15 | 北京大学深圳研究生院 | Method of registering and controlling wireless sensor network terminal through formal description of object |
| CN103517402B (en) * | 2012-06-25 | 2018-04-13 | 北京大学深圳研究生院 | A kind of wireless sensing network terminal registration of object-oriented formalized description and control method |
| CN108512679A (en) * | 2017-02-27 | 2018-09-07 | 华为技术有限公司 | A kind of management method and device of gateway device |
| CN108512679B (en) * | 2017-02-27 | 2020-09-08 | 华为技术有限公司 | Gateway equipment management method and device |
| CN110139273A (en) * | 2019-05-31 | 2019-08-16 | 无锡东源工业自动化有限公司 | A kind of safety encryption and system for Internet of Things wireless transmission |
| CN110351727A (en) * | 2019-07-05 | 2019-10-18 | 北京邮电大学 | A kind of certifiede-mail protocol method suitable for wireless sensor network |
| CN110351727B (en) * | 2019-07-05 | 2020-06-02 | 北京邮电大学 | Authentication and key agreement method suitable for wireless sensor network |
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Application publication date: 20120314 |