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214 results about "Valid time" patented technology

In temporal databases, valid time (VT) is the time period during which a database fact is valid in the modeled reality. As of December 2011, ISO/IEC 9075, Database Language SQL:2011 Part 2: SQL/Foundation included clauses in table definitions to define "application-time period tables" (that is, valid-time tables). Valid time was coined by Richard T. Snodgrass and his doctoral student.

Authentication method for invoking open interface and system

The embodiment of the invention discloses an authentication method for invoking an open interface and a system for executing the method. The method comprises the following steps: a service provision platform receives an interface invoking request of an application program transmitted by a server side or a client side, wherein the interface invoking parameters comprise application identification, a private secret key and valid time allocated by the server side for the interface invoking; the private secret key is allocated by the service provision platform when the server side is registered in the service provision platform; the client side logs in the server side, acquires authentication and acquires the interface invoking parameters from the server side; the service provision platform acquires the private secret key corresponding to the application identification from the pre-assigned parameter records, and authenticates the interface invoking request based on the acquired private secret key; if the authentication is successful, the corresponding interface invoking is permitted; or, the interface invoking request party is refused to invoke the corresponding interface. The authentication method can ensure the interface invoking security, the interface invoking process is simple, and the interface invoking efficiency is high.
Owner:CHINA TELECOM CORP LTD

Band dynamic selecting and time scheduling method in heterogeneous network

The invention provides a band dynamic selecting and time scheduling method in a heterogeneous network, relating to a method and equipment for dynamically selecting usable frequency resources in a plurality of main system bands in a heterogeneous network system based on the cognitive technology, in particular to a method and equipment used for opportunity spectrum access, frequency resource efficient utilization, and combination of heterogeneous network resource amalgamation and user business service quality (QoS) assurance. The invention has the band dynamic selecting method as follows: firstly, aiming to different main system characteristics, an average main system user detection threshold of each main system of a base station CBS accessory is defined and cognized, and the threshold is an average value of the prior detection threshold in a wireless network transmission environment; secondly, according to the average main system user detection threshold and the throughput needs of a secondary system user, scanning efficient time of CBS to each main system is defined; thirdly, the CBS selects the optimal main system band from a usable band list according to a request of a user, the wireless transmission characteristics and a channel state of a band channel are the basis for selecting the optimal band, and interruption of the equipment CPE transmission throughput is preset according to the user.
Owner:NANJING UNIV OF POSTS & TELECOMM

Vehicular Ad hoc network routing method based on autonomously acquired road information

InactiveCN103281742ADensity gainIncrease the probability of successful deliveryTransmissionWireless communicationTime delaysVehicle driving
The invention discloses a vehicular Ad hoc network routing method based on autonomously acquired road information. The method is characterized in that when a packet forwarding direction and a vehicle driving direction are different, on the basis of the valid time of links and the distance from a predicted position of a vehicle to a target intersection, forwarding priority values of nodes are calculated, and therefore the valid time of packet transmission lines is long, and the stability of the links is improved during a routing process, and moreover, a node forwarding packet near a destination node is selected by combining the directions, and therefore the transmission time of the packet and the condition that the packet is transmitted repeatedly on the same road segment are reduced, and the time delay of packet transmission is greatly reduced. According to the method disclosed by the invention, road density information can be acquired more accurately, and moreover, routing nodes which are more efficient are selected by utilizing real-time road information more effectively. As a piecewise autonomous road density estimation method and a packet forwarding scheme of integrating a direction parameter and a position parameter are adopted by the method, the goal that the vehicle autonomously acquires the real-time road density information is achieved.
Owner:NANJING UNIV OF POSTS & TELECOMM +1

Open platform authorization and authentication system and method based on OAuth protocol

ActiveCN106534175AConvenient authorization and authentication operationsAvoid Repeated Authorization and AuthenticationTransmissionAcquisition timeOpen platform
The invention discloses an open platform authorization and authentication system and method based on an OAuth protocol, and mainly aims to solve the problem of misuse of a resource access token since the valid time of the resource access token is not optimized or limited reasonably in the prior art. The system comprises an authorization client and an authorization server, wherein the authorization client is used for transmitting an authorization and authentication request, receiving the resource access token and the valid time of the token through function modules inside the authorization client, and resetting the valid time of the token according to acquisition times and time of user resources; and the authorization server is used for receiving and checking the authorization and authentication request, acquiring an unauthorized access token and the valid of the token through function modules inside the authorization server, generating a resource access token and the valid time of the token, and transmitting the resource access token and the valid time of the token to the authorization client. Through adoption of the open platform authorization and authentication system and method, an authorization and authentication process is simplified, and the resource security is improved. The open platform authorization and authentication system and method can be applied to an authentication and authorization process during acquisition of open platform resources.
Owner:XIDIAN UNIV

Method and apparatus for controlling uplink multicast service

The present invention provides a method and apparatus for controlling the transmission of uplink multicast service data in communication network. According to the invention, a user equipment sends request to a multicast controlling device for the permission of providing uplink multicast data stream; once the uplink multicast controlling device has verified and accepted the request, it will assign multicast address, bandwidth, valid time for it and update the uplink multicast forwarding table at the access device to establish an uplink multicast dedicated VLAN. After that, the access device will forward multicast data from the UE according to the uplink multicast forwarding table configured by the uplink multicast controlling device, to be specific, allowed multicast packets to be forwarded into the uplink multicast dedicated VLAN, and get to the multicast router via the uplink multicast dedicated VLAN. Finally, the multicast router will take the responsibility of multicast distributing of the uplink multicast service data. Based on the present invention, the access of uplink multicast and the data transmission can be well controlled, the multicast routers provide multicast service to the network in a centralized manner. Also, this is compatible with the existing multicast and unicast services.
Owner:ALCATEL-LUCENT USA INC

System and method for judging effective program watching of user for intelligent television

The invention provides a system and method for judging effective program watching of a user for an intelligent television. A terminal data collecting module collects program playing records of an intelligent television side, the program playing records include program attributes, playing durations and practical program durations, and the program playing records are uploaded to a cloud server; a cloud analyzing module calculates whether the playing duration of a certain program is larger than the playing time threshold value based on the program playing record data uploaded by the terminal data collecting module, and if yes, the next step is executed; whether the result obtained by subtracting the playing duration from the practical duration of the program is larger than the fixed time threshold value or not is calculated, and if yes, the next step is executed; the program is pushed to the UI interface of the intelligent television side corresponding to the MAC address. The effective time for watching film and television programs of the user is judged, afterwards, the programs which are not played to the end and series programs are recommended for the user on the launcher page (UI page), the programs which the user wants to watch continuously can be watched by the user through only one step, and the use experience of the user is greatly promoted.
Owner:SICHUAN CHANGHONG ELECTRIC CO LTD
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