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132 results about "Unique device identifier" patented technology

The Unique Device Identification (UDI) System is intended to assign a unique identifier to medical devices within the United States. It was signed into law on September 27, 2007, as part of the Food and Drug Administration Amendments Act of 2007. This act includes language related to the establishment of a Unique Device Identification System.

Power and environment data monitoring method based on NB-IOT communication

The invention discloses a power and environment data monitoring method based on NB-IOT communication, and belongs to the technical field of Internet of Things equipment monitoring. The method comprises the following steps: deploying and integrating multiple types of sensors and an NB-IOT module at a monitoring terminal; establishing a connection between the terminal and the management system through NB-IOT, and distributing a unique device identifier and a platform access address; the terminal receives the SFN signal of the base station, converts the SFN signal into a UTC timestamp, collects moving ring data, adds the timestamp and transmits the moving ring data to the platform; the platform aligns the multi-source data with a timestamp, and establishes space-time association in combination with equipment space coordinates; and monitoring the equipment state based on the spatio-temporal data sequence, triggering an offline / online alarm event through a double-threshold strategy, and pushing the event to a management terminal. According to the method, the problems of multi-source data space-time misalignment and high equipment state misjudgment rate in existing dynamic environment monitoring are solved, and the fault positioning precision and the operation and maintenance response efficiency are remarkably improved by adopting a base station time service synchronization and space-time fusion analysis technology.
Owner:JIANGXI YOUDIAN PLANNING & DESIGN INST CO LTD

System for adaptive multi-factor authentication with NFC tags in identity management networks

A system for adaptive multi-factor authentication using NFC tags in identity management networks, consisting of: an NFC-enabled authentication device configured as a passive label embedded in a smart card, a wearable device, or a physical token, the device including a secure element for storing a cryptographic key pair and a unique device identifier; a terminal device comprising an NFC reader module, a cryptographic coprocessor, a biometric capture interface, and a local control processor configured to initiate a cryptographic challenge-response authentication protocol with the NFC-enabled authentication device upon proximity detection within 10 centimeters; a backend identity management server connected to the end device via a secure communications network, the server comprising a context-aware policy engine, a machine learning-based risk assessment module, and an identity federation interface; wherein, upon receiving a response to a cryptographic challenge signed with the private key embedded in the NFC device, the end device transmits this signed response, biometric data, and context-aware metadata including a timestamp, geolocation of the end device, and device trust level to the backend identity management server; and wherein the backend identity management server evaluates a dynamically generated risk assessment based on real-time behavior analysis, authentication history, and context data and applies an adaptive authentication policy that conditionally permits access;denied or escalated to additional authentication factors.
Owner:JASUJA NIMISHA CHAMPAIGN +1

Data structures for intelligently resolving deterministic and probabilistic device identifiers to device profiles and / or groups

An electronic device identifier mapping and resolution system are disclosed which may be used to analyze various device identifiers associated with an online event initiated by a particular device in applying a matching algorithm to determine a unique device identifier and / or device profile for the device. Device identifiers provided from disparate sources (such as web browser cookies, network IP addresses, device-specific identifiers, application-specific identifiers, custom identifiers, probabilistic identifiers, etc.), including both deterministic and / or probabilistic identifiers, may be analyzed according to the matching algorithm to determine a device identifier associated with the device. Matching algorithms may be customized and configured to a high degree of complexity for respective entities, such as to analyze disparate device identifiers according to a variety of identifier comparison functions and matching tiers. Matching algorithms may include conditional requirements that streamline execution of such algorithms, e.g., which may reduce processor load and increase execution time, such as conditional requirements that bypass portions of the matching algorithm based on particular identifiers associated with the online event that are initially analyzed.
Owner:THE 41ST PARAMETER

Digital security detection method and system based on OBU equipment

The embodiment of the invention relates to the technical field of ETC (Electronic Toll Collection), and discloses a digital security detection method based on OBU (On Board Unit) equipment, which comprises the following steps: starting a Bluetooth communication module in the OBU equipment to search all Bluetooth wireless signals in the current environment; and receiving all searched Bluetooth wireless signals, and matching the unique device identifier in the obtained Bluetooth wireless signals with a preset information verification list of the OBU device, if the unique device identifier is matched with the preset information verification list, the verification is passed, and if the unique device identifier is not matched with the preset information verification list, the verification fails. When the verification is passed, the OBU equipment own program sets the transaction function of the OBU to be in an available state; and when the verification is not passed, the OBU own program sets the transaction function of the OBU to be in an unavailable state. According to the method, whether the OBU equipment is in an allowed physical range or not can be quickly judged, so that the transaction function of the OBU can be controlled to be available or unavailable.
Owner:GUANGDONG CTV INFORMATION TECH CO LTD

Certificate entitlement licenses for authenticating public key infrastructure certificate enrollment

Systems and methods for authenticating public key infrastructure certificate enrollment using certificate entitlement licenses. One example system includes a device manager including an electronic processor. The electronic processor is configured to receive a request for software for an electronic device including a unique electronic device identifier. The electronic processor is configured to determine, based on the request, whether the electronic device is entitled to participate in a certificate management service. The electronic processor is configured to, responsive to determining that the electronic device is entitled to participate in a certificate management service, transmit a certificate entitlement license request including the unique device identifier to a certificate entitlement license manager. The electronic processor is configured to receive, from the certificate entitlement license manager, a certificate entitlement license for the unique device identifier. The electronic processor is configured to deliver the certificate entitlement license based on the unique device identifier.
Owner:MOTOROLA SOLUTIONS INC

Method of processing payments and issuing electronic receipts over near field communication

Computing devices and methods for issuing an electronic receipt. Transaction information may be received and sent to a transfer rail. A unique transaction identifier can be generated using a hash function applied to the transaction information, and / or using the date information and time information, and / or a unique device identifier. A uniform resource locator (URL) can be generated based on the unique transaction identifier and / or at least some of a plurality of receipt elements. A confirmation of a successful completion of a transfer card transaction may be received from the transfer rail. The URL can be sent to an NFC tag controller.
Owner:PI-XCELS PTE LTD

Asset management system based on industrial internet identification

The invention discloses an asset management system based on industrial internet identification, and relates to the field of equipment management, and the system comprises an identification reading module which is used for collecting parameter attribute information of target equipment in real time through a PLC; the target identification module is used for deploying a sensor at a target device, detecting and identifying a plurality of index data of target areas inside and outside the device, identifying the target areas conforming to an attention threshold value, generating unique device identifiers of the target areas, and marking and storing the unique device identifiers; the data analysis unit is used for evaluating the health state of a target area represented by a certain equipment identifier, performing time period segmentation on a plurality of current task indexes of the equipment to form digital index identifiers, and evaluating association scores between the index identifiers and the equipment identifiers; the health state of the equipment is evaluated in real time, the high efficiency and accuracy of the system are ensured, the intelligent level of equipment management is improved, and a more personalized and accurate management scheme is provided for a user.
Owner:SHENZHEN BAOJIANTOU INTELLIGENT TECH CO LTD

Telecommunications network

This invention provides a method of operating a wireless local area network, the wireless local area network including a user device, a wireless access point and a wireless repeater, wherein the wireless repeater is configured to virtualise a Media Access Control, MAC, address of the user device when the user device is connected to the wireless repeater by changing the Organisationally Unique Identifier, OUI, of the MAC address, the method comprising the steps of: obtaining data including a plurality of records, wherein each record of the plurality of records relates to the user device and includes a MAC address and a device label of the user device, wherein at least one record of the plurality of records includes a MAC address that has been virtualised by the wireless repeater; processing each record of the plurality of records by: determining that the MAC address of the processed record is a local MAC address, and, if so, identifying another record of the plurality of records that is uniquely associated with the user device based on the MAC address of the processed record by determining a Network Interface Controller, NIC, value of the MAC address of the processed record, determining that the determined NIC value is uniquely associated with a device label in the plurality of records, and identifying another record of the plurality of records having the associated device label, and assigning a unique identifier to the processed record based on the MAC address of the identified other record of the plurality of records; analysing the plurality of records having the unique device identifier; and causing a reconfiguration in the wireless local area network based on the analysis.
Owner:BRITISH TELECOM PLC

Methods and system for secure short messaging service (SMS) communication

A method for securely sending short messaging service (SMS) communications from a source device 302 to a destination device 304. An SMS communication 306 intended for the destination device is transmitted from the source device to a remote server 314. The remote server determines whether the SMS communication is suitable for processing and creates a partial encryption key using a plurality of unique device identifiers 318 obtained from the destination device. The remote server further obtains a public rotating key 316, and combines the partial encryption key with the public rotating key to generate a complete encryption key. The SMS communication is encrypted using the complete encryption key and the encrypted SMS communication 320 is sent from the remote server to the destination device over a conventional SMS delivery network. A remote server app may be installed on the destination device, and the unique device identifiers may be received by the remote server via the app.
Owner:AUGNET LTD

Intelligent credible sensing system applied to commodity traceability

The invention discloses an intelligent trusted sensing system applied to commodity traceability. The system comprises a PUF module which is used for generating a unique device identifier DID and registering the device identifier DID to a block chain network; the sensing and positioning module is used for acquiring related information of the equipment in real time; the microprocessor module is used for processing the information and coordinating operation of other modules; the encryption module is used for encrypting the processed data and carrying out identity authentication on the equipment; the communication module is used for uploading the encrypted data to a cloud server; the block chain evidence storage module is used for storing the data through a block chain network and executing a data processing and evidence storage process through an intelligent contract; the storage module is used for storing data; and the power management module is used for providing power support for the system. According to the system, comprehensive coverage of equipment identifier generation, environment perception, data processing and encrypted transmission in the commodity traceability process is realized, and the accuracy, real-time performance and safety of traceability information are improved.
Owner:ZHOUSHAN DONGHAI MICROCORE OCEAN DIGITAL SCIENCE INSTITUTE

Emergency information management system and method based on mobile internet and two-dimensional code

The invention relates to the technical field of first-aid information management, and discloses a first-aid information management system and method based on a mobile internet and a two-dimensional code, and the method comprises the following steps: obtaining a unique identifier of equipment from a security chip, generating a dynamic encryption UUID through a hybrid encryption algorithm in combination with a precise timestamp and geocoding data, and storing the dynamic encryption UUID in the security chip; a key derivation technology is adopted to ensure that each session key is independent, and finally a standardized encrypted identifier is output; the encrypted UUID, the timestamp and the metadata of the authority level are integrated with the digital signature, and the dynamic two-dimensional code containing the ultraviolet mark is generated through serialized coding, error correction enhancement and physical anti-counterfeiting processing. Through deep fusion of dynamic data anchoring and multi-dimensional security verification, an end-to-end trusted first-aid information channel is constructed, and information lag and security defects of a traditional static management mode are effectively overcome.
Owner:QINGDAO WEIDA SPORT CO LTD

Computing framework for enforcement of data privacy consent through device fingerprints

There are provided systems and methods for a computing framework for enforcement of data privacy consent through device fingerprints. A service provider, including an electronic transaction processor, may provide consent management and enforcement through device fingerprints server-side in place of using device-side cookies or other data. When a device interacts with a service provider and provides or generates user data, the user of the device may opt-in to consenting to share or use that user data for targeted content and / or personalized services. The device may be fingerprinted using unique device parameters and a fingerprinting algorithm to generate a unique device identifier. User segments may then be built for the user based on the user data and to hide or obfuscate the user data. The device fingerprint may then be shared with the user segments so that when the device is further detected, targeted content and personalization may be provided.
Owner:PAYPAL INC

Hotel room management method and system

The invention discloses a hotel room management method and system, and relates to the technical field of Internet of Things and equipment management, and the method comprises the steps: obtaining the room number of a hotel room and the module information in the room, and defining the unique equipment identifier of each piece of equipment in the room; the unique device identifier is bound with a room main control module, and the room main control module communicates with a remote platform; business scene presetting associated with the room type is established and issued on the remote platform, and the room main control module detects and executes equipment control action according to the received business scene presetting. According to the invention, each piece of equipment is ensured to be accurately monitored and managed on the system level, the operation processes of subsequent batch configuration and remote maintenance are simplified, and the hotel operation efficiency is greatly improved. And the room type template can be continuously optimized, scene configuration can be adjusted, personalized linkage control for different guest habits or room types can be realized, and the guest check-in experience can be obviously improved.
Owner:SHANDONG BITTEL INTELLIGENT TECH CO LTD

Precise association method and device for network end relationship in XDR

The invention discloses a network end relation accurate association method and device in XDR. The method comprises the following steps: receiving an equipment unique identification request of an EDR terminal and an equipment unique identification request of NDR equipment; corresponding equipment unique identifiers are respectively distributed to the corresponding NDR equipment and the EDR terminal; grouped device identification information is obtained from the NDR device, each group of device identification information comprises a unique device identification of the NDR device and unique device identifications of a plurality of EDR terminals, and the unique device identification of the NDR device is the unique device identification of the NDR device. The equipment unique identifier of the EDR terminal is obtained by monitoring corresponding NDR equipment and analyzing a TLS extension field according to a preset TLS custom handshake extension field, and the TLS extension field is constructed by the EDR management center according to the preset TLS custom handshake extension field and the equipment unique identifier of the EDR terminal. According to the invention, the rapid association and security analysis of the equipment and the host are realized, the detection and response efficiency of security events is improved, and the management and maintenance work in a complex network environment is simplified.
Owner:CHENGDU MANYIN TECHNOLOGY CO LTD

Dynamic allocation method, device, computer equipment and storage medium for algorithm resources

The present application relates to the field of resource allocation technology, and discloses a method, apparatus, computer equipment, and storage medium for the dynamic allocation of algorithm resources, wherein the method includes obtaining and parsing application business applications to obtain resource application information; allocating algorithm service resources from a cloud service management platform, and generating a virtual algorithm service device and a unique device identifier based on the algorithm service resources; applying for authorization from an authorization management module to obtain an authorization patch package issued by the authorization management module, and installing the authorization patch package on the virtual algorithm service device, wherein the authorization information is bound to a unique device identifier; if an application business cancellation application command is received, the algorithm service resources and the corresponding authorization information corresponding to the application business cancellation application command are released. The present application is conducive to improving the allocation efficiency of algorithm resources through the dynamic allocation of algorithm resources, and by binding the algorithm authorization to the unique device identifier, it protects the algorithm authorization from being shared by other devices.
Owner:E SURFING IOT CO LTD

Medical high-value consumable management system, method, device, and medium

The application provides a medical high-value consumable management system, method, electronic equipment and storage medium. The system comprises a high-value consumable management module, which is also used to obtain traceability information of high-value consumables according to the unique device identifier and the globally unique identifier; a table-following surgery module connected to a surgery management system of a hospital and the high-value consumable management module, which is used to record consumption amount, category and use of high-value consumables used in a surgery process, and synchronize the consumption data to the inventory management system; an inventory management and replenishment decision module used to obtain real-time inventory information, storage cost and ordering fixed cost of high-value consumables; a traceability and reporting module used to generate consumable use traceability reports and inventory change trend reports, which can significantly improve the management efficiency of medical high-value consumables, reduce errors and resource waste caused by human intervention, adopt a demand prediction method based on a long short-term memory network (LSTM), and accurately predict the use trend of future consumables, effectively avoiding the situation of inventory accumulation or shortage.
Owner:GUANGZHOU XINHENG SOFTWARE CO LTD

An industrial network-based control system cloud-edge commissioning method

The application discloses a kind of control system cloud edge commissioning methods based on industrial network, comprising: using the large bandwidth of 5G network, low latency and network slice capacity, unified management in cloud multiple control system commissioning tasks;Each physical control system is registered to cloud by the unique device identification that it is independently generated in its built-in lightweight debugging agent module;Planning debugging channel, allow multiple low-priority control system to share channel to improve resource efficiency, high real-time control system then monopolizes channel to guarantee performance;All commissioning data carry device identification transmission, each control system built-in debugging agent module strictly checks device identification, only handles the instruction that matches this system, realizes the on-demand acquisition of multiple control system state information, accurate distribution and collaborative diagnosis, significantly improve the concurrency capability of remote debugging, resource utilization and system reliability.And adapt to the remote maintenance, efficient commissioning and real-time response demand under the multi-device collaborative scenario in industrial automation.
Owner:HANGZHOU DIANZI UNIV

Independent addressing of single-wire and two-wire devices on shared RFFE bus interface

A data communication apparatus coupled to a serial bus has a protocol controller that configures to a first plurality of slave devices a device identifier unique within the first plurality of slave devices, and configures to a second plurality of slave devices a device identifier unique within the second plurality of slave devices. A sequence start condition sent over the serial bus indicates a first communication mode in which a clock signal is provided to the serial bus or a second communication mode in which no clock signal is provided. A device identifier associated with the first plurality of slave devices is used to transmit a first datagram over the serial bus in the first communication mode, and a device identifier associated with the second plurality of slave devices is used to transmit a second datagram over the serial bus in the second communication mode.
Owner:QUALCOMM INC

Handcart type circuit breaker electric operation device and method with two-dimensional code verification function

The invention discloses a handcart type circuit breaker electric operation device and method with a two-dimensional code verification function. The device comprises a man-machine interaction unit, a two-dimensional code identification unit, an electric execution unit and a control unit. Wherein the man-machine interaction unit is used for receiving operation task information input by a user; the two-dimensional code recognition unit is used for scanning a two-dimensional code on the handcart type circuit breaker body and extracting a unique equipment identifier; the control unit is used for comparing the target equipment identifier with the currently extracted unique equipment identifier, and controlling the electric execution unit to start under the condition that the identifiers are matched; and the electric execution unit is used for driving the handcart type circuit breaker matched with the identification to move between a working position and a test position in a starting state. According to the device, misoperation of the handcart type circuit breaker is prevented through two-dimensional code verification, automatic operation is carried out by controlling the electric execution unit, and the accuracy and safety of operating the handcart type circuit breaker are improved.
Owner:SICHUAN HUANENG BAOXINGHE HYDROPOWER CO LTD

Internet of Things equipment management method and system based on MQTT protocol

The invention provides an Internet of Things equipment management method and system based on an MQTT protocol. The method comprises the following steps: sending an equipment discovery request carrying an equipment unique identifier to a cloud platform; receiving an authorization certificate and MQTT server connection information sent by the cloud platform; the authorization certificate and the MQTT server connection information are generated by the cloud platform according to the unique identifier of the equipment; according to the connection information of the MQTT server, establishing encrypted connection with the MQTT server, and performing identity authentication by using the authorization certificate during connection; a downlink management message sent by the cloud platform is received and analyzed, and the downlink management message is in a predefined JSON format and comprises a message type field used for defining behavior operation and an authorization certificate used for session verification; and verifying the authorization voucher in the downlink management message, and executing a corresponding management operation according to the message type field after the verification is passed. Through the technical scheme of the invention, the security of the remote management process can be improved.
Owner:TRANSCEND COMM BEIJING

System and method for deterring theft of package, and device therefor

A system, method, and a package tracking device for tracking the movement of a package to prevent theft of the package are described. According to an embodiment, a package tracking device adapted to be attached with a package is described. The package tracking device having a unique device identification number allows a user, through an application interface running of a wireless communication device, to associate a geographical boundary (geo-fencing) with the delivery address of the package. The package tracking device operates in a passive tracking mode when the package is within the defined geographical boundary, generates a first signal when the package is moved from a drop location, generates a second signal when the package is moved out from the geofencing associated with the delivery address and operates in active tracking mode when the package is moved out from the geofencing associated with the delivery address.
Owner:ZFLO TECH LLC

Method and system for routing an internet protocol data packet between wireless computer devices connected to a cellular network

The invention facilitates private, low latency routing of an Internet Protocol data packet between wireless computer devices connected to a cellular network. A router system stores a device group relationship defining a set of unique device identifiers (UDIs) of devices. The router system receives, via a radio access network (RAN) of the cellular network but without traversing the Internet, the IP data packet including a UDI of a source device that generated the IP data packet. The router system may determine whether the data packet is public so as to be forwarded on the Internet, or private. If private, then the router system forwards, via the RAN but without traversing the Internet, the IP data packet to a destination device. The forwarding is conditional on the set of UDIs including both a UDI of the destination device, and the UDI of the source device included in the IP data packet.
Owner:ARKIDAN SYST INC

Systems and methods for use in securing digital identities for user authentication

Systems and methods are provided for use in provisioning digital identities for users. One example computer-implemented method includes receiving, by a computing device, a request to register a digital identity to the communication device, where the request includes a unique device identifier specific to the communication device and at least one biometric, and determining, by the computing device, whether the unique device identifier is associated with an existing digital identity. The method also includes, in response to determining that the unique device identifier is associated with the existing digital identity, declining, by the computing device, provisioning of a digital identity to the communication device.
Owner:MASTERCARD INT INC

Advertisement delivery data evaluation system based on multi-channel information integration

The invention relates to the technical field of evaluation optimization, and discloses an advertisement delivery data evaluation system based on multi-channel information integration, and the system comprises a data standardization and fusion module which is responsible for receiving multi-source heterogeneous original data, carrying out the cleaning through a built-in data connector and an analysis engine, and carrying out the analysis of the multi-source heterogeneous original data; and forcibly converting all data into a unified atomic event model containing a unique device identifier, a standard timestamp and standard latitude and longitude coordinates. The technical effects of scientifically stripping interference factors and quantifying an online conversion net contribution value brought by offline advertisement putting in a causal inference mode are achieved by constructing an exposure group, generating a scientific control group by applying a tendency score matching algorithm and finally calculating a conversion improvement rate; the defect that the actual contribution of offline advertisements to online conversion cannot be accurately attributed and quantified due to the lack of reliable cross-screen tracking and scientific attribution methods is overcome.
Owner:BEIJING SHIYI TECHNOLOGY CO LTD

Method for processing payments and issuing electronic receipts via near field communication

Computing devices, computer-implemented methods, and non-transitory computer-readable media are provided for issuing an electronic receipt at a point of sale and using near field communication (NFC) technology.SOLUTION: The method receives 1110 transaction information, transmits 1120 the transaction information to a transfer rail of transaction information, generates 1130 a unique transaction identifier using date and time information and / or a unique device identifier using a hash function applied to the transaction information, generates 1140 a uniform resource locator (URL) based on at least a portion of the unique transaction identifier and / or a plurality of receipt elements, receives 1150 a confirmation of successful completion of the transfer card transaction from said transfer rail, and transmits 1160 the URL to an NFC tag controller.SELECTED DRAWING: Figure 11
Owner:PI-XCELS PTE LTD

Needle shields with unique identifying information

A syringe assembly and a needle shield are disclosed herein. The needle shield includes an outer casing defining a cavity therein, an inner casing positioned at least partially within the cavity, with the inner casing configured to receive at least a portion of a needle therein. A label is positioned within the cavity and external to the inner casing, wherein the label includes at least one unique device identifier.
Owner:BECTON DICKINSON FRANCE SAS

An advertisement delivery data evaluation system based on multi-channel information integration

The application relates to the field of evaluation optimization, and discloses an advertisement putting data evaluation system based on multi-channel information integration, which comprises a data standardization and fusion module, which is responsible for receiving multi-source heterogeneous original data, cleaning through an embedded data connector and an analysis engine, and forcibly converting all the data into a unified atomic event model containing a unique device identifier, a standard time stamp and a standard latitude and longitude coordinate. A scientific control group is generated by constructing an exposure group and using a propensity score matching algorithm, and finally, a conversion promotion rate is calculated, so that the technical effect of scientifically stripping interference factors and quantifying the online conversion net contribution value brought by offline advertisement putting in a cause-effect inference manner is achieved, and the problem that offline advertisement actual contribution to online conversion cannot be accurately attributed and quantified due to the lack of reliable cross-screen tracking and scientific attribution methods is solved.
Owner:BEIJING SHIYI TECHNOLOGY CO LTD

Method for preventing false subscription of value added service of IPTV (Internet Protocol Television)

The invention relates to the technical field of IPTV (Internet Protocol Television) value-added services, in particular to a method for preventing false ordering of an IPTV value-added service, which comprises an operator, an SP (Service Provider), a cashier desk, a payment plug-in, a user data interface and the IPTV, a user browses the value-added service provided by the SP through an IPTV set top box and initiatively initiates an ordering request based on the own demand, and when the SP receives the ordering request of the user, the SP sends the ordering request to the IPTV. A payment plug-in is called, the payment plug-in is a unique cashier entrance, real equipment of a user is recognized through technologies such as equipment fingerprints, the authenticity of a request source is ensured, the payment plug-in carries a cached unique equipment identifier, a background interface of a cashier is accessed, and the background of the cashier executes multiple verifications; according to the method, false violation ordering behaviors are accurately recognized and intercepted in time, violation ordering is blocked before ordering is completed, economic losses of users are avoided, bad debt losses of operators are reduced, the operators can intercept malicious violation ordering in advance, trust of the users to the operators can be increased, and user stickiness can be increased.
Owner:NANJING YAXIN INTELLIGENT NETWORK TECH CO LTD