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SDN (Software Defined Network) platform based on router virtualization and implementation method

ActiveCN105681191ARealize traffic interworkingGood data plane performanceData switching networksSoftware simulation/interpretation/emulationData virtualizationSoftware
The invention discloses an SDN (Software Defined Network) platform based on router virtualization and an implementation method, and relates to the field of virtualization technology, SDNs and cloud computation. The SDN platform comprises a virtual router, an Openflow switch and an SDN controller, wherein the SDN controller comprises an eastbound-westbound interface, a northbound interface, a first southbound interface and a second southbound interface; the second southbound interface is used for controlling data packet forwarding of the virtual router, and recording flow entry information of the virtual router; the first southbound interface is used for learning routing topology and a flow table of the second southbound interface in order to control rapid forwarding of the Openflow switch; and an application programming interface (API) layer based on an Openflow protocol is encapsulated on an integrated code layer of the virtual router. Through adoption of the SDN platform based on the router virtualization and the implementation method, high data forwarding performance and routing performance between an SDN network and a conventional network can be realized. The virtual router has the characteristics of high functional extensibility and high flexibility, and can be applied to the cloud computation easily.
Owner:FENGHUO COMM SCI & TECH CO LTD

Method for constructing problem difficulty level based on big data as well as device and service equipment

The embodiments of the invention relate to the technical field of computers, and disclose a method for constructing a problem difficulty level based on big data as well as a device and service equipment. The method comprises the following steps: collecting answer data for multiple student users to answer a certain target exercise; judging a grade identifier indicating the grade of each student in the multiple student users is same as that in attribute information of the target exercise or not; and when the grade identifier indicating the grade of each student in the multiple student users is same as that in the attribute information of the target exercise, calculating the answering accuracy of the target exercise on the basis of the answer data for the multiple student users to answer the target exercise; and determining the problem difficulty level of the target exercise on the basis of the calculated answering accuracy, and updating the determined problem difficulty level into the attribution information of the target exercise. By implementing the embodiments of the invention, the problem difficulty level of an exercise can be objectively defined, and dynamic and flexible management of the defined problem difficulty level can be achieved.
Owner:GUANGDONG XIAOTIANCAI TECH CO LTD

Method and device for identifying access control identity based on ultrasonic waves

The invention provides a method and a device for identifying access control identity based on ultrasonic waves. The method comprises the following steps of enabling each user to install an access control APP (application) at a hand-held mobile terminal, and use the ID (identity) to register as the user of the access control APP; generating an encrypting key and a decrypting key; enabling an access control machine to obtain the information of the users, and storing into a local database; when the distance between the hand-held mobile terminal and the access control machine is controlled within the setting range, using an encrypting algorithm and the encrypting key to encrypt the ID to obtain encrypting information, converting the encrypting information into a data frame, converting the data frame into an ultrasonic signal by an ultrasonic digital encoding type, transiting the ultrasonic signal via a loudspeaker, enabling the access control machine to receive the ultrasonic signal and convert the ultrasonic signal into the data frame, demodulating, and decrypting to obtain a plain text; if the plain text is matched with the information of the local database, automatically opening a door. The method and the device for identifying the access control identify based on the ultrasonic waves have the beneficial effects that the safety is higher, the use cost is reduced, and the reliability is higher.
Owner:SHENZHEN YUDI TECH CO LTD
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