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49 results about "Connection-oriented communication" patented technology

Connection-oriented communication is a network communication mode in telecommunications and computer networking, where a communication session or a semi-permanent connection is established before any useful data can be transferred, and where a stream of data is delivered in the same order as it was sent. The alternative to connection-oriented transmission is connectionless communication, for example the datagram mode communication used by the IP and UDP protocols, where data may be delivered out of order, since different network packets are routed independently, and may be delivered over different paths.

Rerouting in connection-oriented communication networks and communication systems

A Private Network-Network Interface (PNNI) network including interconnected nodes is defined as a single rerouting domain (“global domain”) and the global domain is further defined by multiple divided domains (“local domains”). Each of the local domains is defined to include multiple nodes that are included in the network. Connection recovery and path optimization in the global domain (the entire PNNI network) are performed in accordance with a global rerouting protocol. The global rerouting protocol is a modification of the standard Domain-Based Rerouting (DBR) protocol, by adding information elements of domain identifier, rerouting for the global domain. The DBR protocol does not support the connection recovery from a link failure between local domains (“inter-domains”) and the global path optimization. The global rerouting method is capable of connection recovery and path optimization outside of any rerouting local domains. The global rerouting provides double fault recovery within the rerouting domain (“intra-domain”) as covered by the DBR and outside of the domains (“inter-domain”) or when the initial fault recovery within the domain has failed. Also, the global rerouting method provides maximum path optimization across all domains and within the rerouting local domain.
Owner:RPX CLEARINGHOUSE

Ultrasound information processing system and ultrasound information exchange protocol therefor

An ultrasound information processing system comprises a plurality of ultrasound devices coupled to a high-speed serial ultrasound information bus, wherein each ultrasound device comprises a program for communicating with other ultrasound devices according to an ultrasound information exchange protocol (UIEP). The UIEP is a lightweight, connection-oriented protocol adapted to efficiently transfer ultrasound information among different devices on the ultrasound information bus. Each ultrasound device comprises an application layer program for performing an ultrasound function, as well as a lower protocol layer program for receiving and sending data across the ultrasound information bus according to a high-speed serial bus standard that provides both isochronous and asynchronous data delivery. The ultrasound information exchange protocol (UIEP) program is adapted to receive a communication request from the application layer, open a connection-oriented communication session with the requested ultrasound device, and transfer ultrasound information through the lower protocol layer and across the ultrasound information bus to the requested device. Advantageously, any ultrasound device manufacturer provided with the UIEP program may readily generate application layer code capable of communicating with other manufacturers' ultrasound devices across the ultrasound information bus, without requiring specific knowledge of the internal structure of the other manufacturers' devices or of the specific frame/packet structure of the UIEP/lower layer protocols themselves.
Owner:U SYST

Connectionless communication system

<heading lvl="0">Abstract of Disclosure< / heading> The object of the present invention is accommodating local connectionless information (data that is immediately transferred without establishing a path to a receive side), such as LAN data in a local area network, by an asynchronous transfer mode (ATM) network using a connection-oriented communication system (which makes data transfers after verifying that a path to the receive side has been established), thereby performing efficient, fast routing of connectionless information. A connectionless communication system of the present invention is equipped with connectionless information cell assembly / disassembly means (30) for bi-directional conversion between variable-length connectionless information and fixed-length connectionless cells, routing control means (31) for analyzing a destination address of information in connectionless cells and controlling the routing of the connectionless cells; and an ATM network (32) for connecting the connectionless information cell assembly / disassembly means (30) and the routing control means (31) by a permanent virtual channel serving as a fixed path and connecting the routing control means together by a virtual channel serving as a semi-fixed path, whereby connectionless information is segmented into connectionless cells and the connectionless information is exchanged within the ATM network in connectionless cell units.
Owner:FUJITSU LTD

Safety intelligent lock system and unlocking and locking control method

The invention discloses a safety intelligent lock system and an unlocking and locking control method. The safety intelligent lock system comprises a lock, a key, a portable electronic device and a remote main station, wherein the portable electronic device is in communication connection with the remote main station, the key is connected with the portable electronic device in a Bluetooth communication manner, the key is in communication connection with the lock, and the portable electronic device is provided with a Bluetooth module. Through the connection communication among the lock, the key, the portable electronic device and the remote main station, the unlocking action and locking action as well as a series of information verification before the unlocking are realized so as to guarantee safe unlocking. The key is small in size, the cost is low, intelligence, convenience in operation, safety and reliability can be achieved, and the unlocking by mistake can be prevented; meanwhile, by adopting the general control and information storage function of a communication network and the main station, the information of unlocking and locking such as an operation target, an operator, a target state, operation time and the like can be effectively recorded and managed, so that the management system in the electric power field can be completed.
Owner:XIAMEN HUASHU ELECTRIC POWER SCI & TECH CO LTD

Intelligent door lock system based on pattern code and Internet

InactiveCN107301702ASolve loose managementSolve problems that are difficult to account for after the factKey distribution for secure communicationTransmission systemsBusiness managementThe Internet
The invention discloses an intelligent door lock system based on a pattern code and an Internet. The intelligent door lock system comprises a door lock control module, a controller, a consumption intelligent handheld terminal and a cloud management platform, wherein the door lock control module is arranged in a house door lock and is in communication connection with the controller via a ZIGBEE communication way; the controller is arranged near the door lock control module, and is in connection communication with a cloud business management platform rand a cloud equipment management control platform via Internet of Things; the consumption intelligent handheld terminal is in communication connection with the cloud management platform; the cloud management platform is respectively in communication connection with the consumption intelligent handheld terminal and the controller. The intelligent door lock system has the advantages that the unique pattern code is produced, a key which can be used as the self key to complete entry and can also be authorized to other persons to be used as the key of the door lock for entry can be produced, the communication route is shortened, the cost is reduced, and the door lock is conveniently and remotely operated and controlled.
Owner:杭州明览智能科技有限公司

Method for direct-connect communication between terminals in wireless network communication system

The invention provides a method for direct-connect communication between terminals in a wireless network communication system. The method comprises the steps that a server assigns direct-connect communication resources to the authorized terminals in a direct-connect communication scenario; direct-connect communication is performed between terminals and terminals by the terminals in a terminal group according to the assigned direct-connect communication resources; partial terminals with capacity of establishing a bidirectional link with a base station in the terminal group can feed back measurement statistical information to the server; and resource assignment is adjusted by the server according to the back-fed direct-connect communication measurement statistical information and the current system state. According to the method for direct-connect communication between the terminals in the wireless network communication system, power consumption of connection-oriented communication process is avoided; a time division multiplexing mode is adopted and the method is compatible with existing wireless communication systems; meanwhile, system time slot resources used by direct-connect communication between the terminals are configured by the set server, and time slot resource allocation can be adjusted by the server according to the measurement statistical information so that utilization rate of the system resources is enhanced.
Owner:SHANGHAI ENG RES CENT FOR BROADBAND TECH & APPL

Near field communication method of non-contact radio frequency identification devices

The invention discloses a near field communication method of non-contact radio frequency identification devices for solving the technical problem of convenience of communication of a plurality of hand-held non-contact radio frequency identification devices. The method comprises the following steps of: making one to one connection-oriented communication by the hand-held non-contact radio frequency identification device A according to a communication ID index table of other non-contact radio frequency identification devices, or utilizing a non-connection-oriented communication mode for sending device settings command subsets, tag read and write command subsets or device status query command subsets; and waiting for serial commands thereof and data sent by other non-contact radio frequency identification devices by the hand-held non-contact radio frequency identification device A when the communication is completed. Compared with the prior art, when the hand-held non-contact radio frequency identification device carries out point to point data exchange with another similar device and carries out data broadcasting with a plurality of devices, the invention has high efficiency, is safe, and expands application flexibility of near field communication of the non-contact radio frequency identification devices.
Owner:INVENGO INFORMATION TECH

Method for precisely synchronizing wireless data of electroencephalogram device

InactiveCN106332268AAchieve wireless synchronizationStimulus synchronizationSynchronisation arrangementWireless network protocolsConnectionless communicationTimestamp
The invention provides a method for precisely synchronizing wireless data of electroencephalogram device. The electroencephalogram device comprises a central processing system and at least one acquisition subsystem. A principal clock of the central processing system completes synchronous timing among secondary clocks of the acquisition subsystems through a method of performing multiple times of time synchronization. Each time of time synchronization comprises the steps that the central processing system sends synchronization data wirelessly to the secondary clocks of all acquisition subsystems through a first communication protocol; the acquisition subsystem resets a timestamp of the corresponding acquisition secondary clocks after receiving the synchronization data; the synchronized secondary clocks add the timestamp to each data packet and send the timestamp to the central processing system through a second communication protocol along with data information; and the central processing system performs data alignment and processing by combining the received data information according to actual requirements. The first communication protocol is a connectionless communication protocol, and the second communication protocol is a connection-oriented communication protocol.
Owner:NEURACLE TECH CHANGZHOU CO LTD
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