45 results about "Local area network" patented technology

In a system and method for handoff using a hybrid network, a wireless local area network (WLAN) terminal determines its own position information through communication with a code division multiple access (CDMA) base station and a global positioning system (GPS) satellite, and a cell mapping server obtains information about a WLAN cell where the WLAN terminal is currently located from the WLAN terminal position information, determines information about a cell to which the terminal is expected to be handed off from the current position of the WLAN terminal, and provides the cell information to the WLAN terminal. This allows handoff to be performed without scanning a destination access point, thereby significantly reducing WLAN handoff time.

According to an embodiment is a system that selectively permits or denies access to a restricted environment. Access can be based at least in part on the status of wireless transmitters of a mobile device, the status is one of active or inactive wireless communication. The system can automatically inactivate or disable a transmitter through a wireless command and thereafter permit access to the restricted environment. The mobile device can communicate wirelessly through one of a wireless local-area networks (WLAN), wireless wide-area network (WWAN), wireless personal-area network (WPAN).

A system wherein a mobile terminal can control the operation of an external communication device using wire/wireless local-area communication. The mobile terminal includes a local-area wireless communication module, and acts to perform the local-area wireless communication using the local-area wireless communication module. The communication device accesses an Internet communication network in response to an Internet access command input thereto to perform wire Internet communication. A wire/wireless data format conversion device is provided to perform the local-area wireless communication with the mobile terminal and wire communication with the communication device, and, in order to enable communication between the mobile terminal and the communication device, convert the format of received data into a format recognizable by a destination device, said destination device being one of the mobile terminal and communication device, and send the resulting data to the destination device over a corresponding transmission channel. The wire/wireless data format conversion device, upon receiving the Internet access command from the mobile terminal, converts the format of the received Internet access command into one recognizable by the communication device and sends the resulting Internet access command to the communication device and, upon receiving Internet access result information from the communication device, converts the format of the received result information into one recognizable by the mobile terminal and transmits the resulting result information to the mobile terminal.

The invention discloses a multicasting stream forwarding method, device and system. Aiming at the condition that a VC (Video Client) and a video EC (encoder) are in the same network segment, a VM (Video Management) server can establish a channel from the EC to the VC through informing the EC of carrying out a dynamic multicasting VLAN (Virtual Local Area Network) declaration and informing the VC of carrying out a dynamic multicasting VLAN declaration, a multicasting stream can be forwarded to the VC from a multicasting source along the channel, thus unnecessary multicasting flood is avoided, and the occupied bandwidth resources are reduced. Aiming at the condition that the VC and the EC are not in the same network segment, the VM server can establish a channel from the EC to a gateway router and then from the gateway router to the VC through informing the EC of carrying out the dynamic multicasting VLAN declaration and informing the gateway router of carrying out the dynamic multicasting VLAN declaration, the multicasting stream can be forwarded to the VC from the multicasting source, thus unnecessary multicasting flood is avoided and the occupied bandwidth resources are reduced.

The invention discloses a telecommunication broadband wireless network access method and wireless network access equipment and aims at providing a shared telecommunication wired access broadband to simultaneously provide a shared broadband access circuit service for wired broadband contracted users and public wireless roaming users. The invention uses the following method to realize the wireless broadband access: the public wireless roaming user can get an access to the wireless network access equipment through a special wireless interface; and after the necessary information processing, the public wireless roaming user can get an access to operator certificate and service devices via a broadband route rented by the wired user to complete the data recovery, security certificate and public network service provision. The wireless network access equipment comprises more than one wireless circuit access modules which can identify internal users and public roaming users through special design; the wireless network access equipment can lead the identified internal users to be linked with an internal local area network firstly; and for identified external roaming users, the wireless network access equipment provides public network broadband services by building up a link which is connected with the certificate and service device of the telecommunication operator via a wired broadband circuit.

A system and method are provided for in-network power management of network-connected devices. A first computing device, having a power management module, is able to access an in-network computing device table stored in a local memory, of network-connected computing devices cross-referenced to computing device processing capabilities. The power management module retrieves processing capabilities from the in-network computing device table for a network-connected second computing device, and sends a Wake-on-Local Area Network (LAN) message to the second computing device. Subsequently, the power management module sends a server-on-cloud power management message (power management packet) to the second computing device, with instructions for enabling capabilities related to processing or memory management.

The invention relates to a low-voltage electrical appliance communication protocol adapter which comprises double single chips, double Modbus-RTU protocol converting circuits, a Profibus-DP, a DeviceNet protocol converting circuit, an off chip data memory, an LCD (liquid crystal display) screen and a keyboard, wherein on chip universal asynchronous receiver-transmitters of the double single chips are respectively connected with the Modbus-RTU and an RS485 level converting transceiver circuit; an on chip control local area network is respectively connected with double DeviceNet converting transceiver circuits to finish acquiring low-voltage electrical appliance data and responding to bus commands and events; meanwhile, I2C communication modules of the single chips are connected with the off chip data memory based on I2C to finish storing the data and extracting processed low-voltage electrical appliance parameters. Due to the adoption of double processor operations and a caching technology, technical schemes such as response time, and the like when other adapters are operated are reduced so as to ensure that the low-voltage electrical appliance communication protocol adapter becomes a centralized controller, a small network server and an adapter. The adapter can hang at most three buses, thereby increasing the adaptability of low-voltage electrical appliances during networking and facilitating users mounting.

The invention provides a mobile terminal network connection processing method and a mobile terminal. The method includes in the process of starting an application program, determining whether the security level of the application program is higher than the security level of a first wireless local area network currently connected with the mobile terminal; and if yes, switching the network connection manner of the mobile terminal to the network connection manner of mobile data business. The method can determine that the currently connected wireless local area network is safe for the application program, furthermore, if the currently connected wireless local area network is unsafe, the mobile terminal is switched to access the network via mobile data business, so that the security of the application program in the data interaction with the external Internet can be guaranteed, and the use security of the mobile terminal can be guaranteed.

The invention discloses a software program upgrading method, device and system. Wherein, the method includes: the client device downloads an upgrade file for updating the target object from the server; the client device sends the upgrade file to at least one device to be upgraded through a local area network, wherein at least one device to be upgraded is connected to the client device into the same LAN. The invention solves the technical problems in the prior art that the WiFi module of the smart home appliance directly downloads the software upgrade program from the server, resulting in low security and slow download rate.

The invention provides a method for moving seamlessly among different networks by a terminal user, a wireless local area network optimization gateway (WOG), a terminal, and a wireless local area network (WLAN) and cellular mobile network tight coupled system. The method comprises: a WOG receiving an access session notification message sent by a terminal, according to the access session notification message, obtaining the attribute information of a current session; and when the attribute information of the current session is cross-network switching access, the WOG selecting the same gateway general packet radio service (GPRS) support node (GGSN) for the current session. By adopting the method provided by the embodiments of the invention, the terminal can seamlessly move among multiple WLAN hot spots and 2/3G cellular internetworks conveniently, on-line data sessions are maintained uninterrupted, and the service experience of users is improved.

The invention relates to an antenna switching method and a mobile terminal. The switching method comprises the steps of controlling an antenna switching unit to switch each WLAN (Wireless Local Area Networks) antenna to be connected with a radio frequency circuit in sequence within a preset period, thereby forming at least two communication links; obtaining the communication link with the fastestsignal transmission rate in the at least two communication links; and controlling the antenna switching unit to connect the radio frequency circuit with the WLAN antenna corresponding to the communication link with the fastest signal transmission rate. Through application of the antenna switching method, after a hand of a user holds partial antennas, the switching to the other antennas can be carried out successfully, so an antenna signal is not influenced, the network speed fluency is ensured, and the user experience is improved.

A middle/high voltage switch cabinet temperature monitoring system based on electronic nose technology is disclosed. Gas storing and releasing devices are arranged at points where overtemperatures are easy to happen in a middle/high voltage switch cabinet; and a field detection terminal is arranged at the bottom of the middle/high voltage switch cabinet, and connected to a background server through a wireless local area network. The middle/high voltage switch cabinet temperature monitoring system is simple in structure and convenient for mounting because only the gas storing and releasing devices are needed to be arranged at the points where overtemperatures are easy to happen in the switch cabinet; and overtemperature signals are transmitted through CO2 gas so that determination is accurate and quick without causing new fault point to the switch cabinet. The system solves the problem that a contactless system is incapable of accurate positioning. Besides, the system is capable of detecting and pre-warning the overtemperature state of the contact of the switch cabinet accurately and quickly; and the system is low in cost and capable of effectively avoiding the burnout accident of the switch cabinet.

The invention relates to the technical field of public security video identification and prevention management, and discloses a video intelligent identification and information push prevention management system, which comprises an IP camera, a mobile camera, a video edge calculation intelligent identification terminal, a cloud server and an information receiving terminal. The video edge calculation intelligent identification terminal acquires video stream data of an IP camera (mobile camera) through a local area network, the video edge calculation intelligent identification terminal is connected with the cloud server through the local area network, and an information pushing engine module pushes the video stream data to the information receiving terminal of a pushed object in a WeChat, short message and APP transmission mode. Through identity recognition technologies such as video intelligent recognition and the like, classification, real-time early warning and linkage of public safetyhazards are realized through classification confirmation, classification early warning, intelligent propaganda and department linkage (such as police-people linkage) and the like of identities, actions, emotions and the like in a certain area, and a new direction is provided for exploring a grass-roots governance mode of co-construction and co-governance sharing.

The invention discloses an Ethernet-based unmanned aerial vehicle formation flight control data link system and belonging to the technical field of unmanned aerial vehicle formation control. The Ethernet-based unmanned aerial vehicle formation flight control data link system includes a ground station computer, a wireless data transmission ground terminal and a wireless data transmission airborne terminal. The wireless data transmission airborne terminal is mounted on an unmanned aerial vehicle and connected to a serial port of the airborne computer of the unmanned aerial vehicle. The wirelessdata transmission ground terminal and the wireless data transmission airborne terminal form a one-to-one communication link, and the wireless data transmission ground terminal is connected to an Ethernet serial port server through a serial port level conversion module, and the Ethernet serial port server and the ground station computer are respectively connected to an Ethernet switch through a network cable to form an Ethernet local area network. According to the Ethernet-based unmanned aerial vehicle formation flight control data link system, mature hardware, such as wireless data transmission, the serial port server and the Ethernet switch, is selected for construction to provide a data chain solution with reliable work, strong performance and controllable cost for an unmanned aerial vehicle formation operation control system.

The invention discloses an advertisement charging pile. The advertisement charging pile is characterized in that the advertisement charging pile comprises a charging pile body fixed on the ground; theinterior of the charging pile body is equipped with a PCB mainboard power management module; the upper end of the charging pile body is provided with an oblique plane, on which an advertisement module is arranged; the advertisement module is a liquid crystal display screen; the liquid crystal display screen is connected with the power management module through a data management module; the liquidcrystal display screen is used for touch-control operation and serves as a play carrier for advertisement media content; the power management module is connected with a switch power module; the switch power module is composed of a driving circuit and an AC-DC switching circuit; current of a power supply connected with the power management module is converted from 110V-220V alternating current todirect current; the power management module is connected with a network module composed of a WIFI module, a GPS location module and a 3G module, a storage hard disk and a local area network; the localarea network is connected with a background server; and then, advertisements are pushed through the background server; and a two-dimensional code payment interface of Wechat or Alipay is displayed through the liquid crystal display screen.

Systems and methods of call setup and information delivery are provided. Calls can be setup between communication units supported by a local area network and those supported by a wide area network using presence information of either or both of the wide area and local area networks.

The invention provides access processing, an access method and a device of a WLAN (Wireless Local Area Network). The access processing method comprises the following steps: an ANDSF (Access Network Discovery and Selection Function) entity receives position information reported by UE (User Equipment); the ANDSF entity transmits access information of the WLAN (Wireless Local Area Network) to the UE according to the received information, wherein the access information of the WLAN is used for indicating an access policy of the UE to the WLAN. According to the technical scheme provided by the invention, the technical problems that the user cannot select proper WLAN to access according to the own actual demands and the like in the related technologies are solved, so that the user experience is improved.

The invention relates to the field of wireless communication, in particular to an STR capability indication method and a related device, for example, the STR capability indication method and the related device are applied to a wireless local area network supporting an 802.11 be standard. The method comprises the steps that a first MLD generates and sends STR capability information used for indicating interference parameter information between a first link adopting a first bandwidth and a second link adopting a second bandwidth; a second device receives the STR capability information and obtains an interference parameter threshold value, and then according to the interference parameter threshold value and the interference parameter information, determines whether the first MLD supports a simultaneous transmit-receive operation on the first link and the second link. According to the invention, whether the multi-link equipment supports simultaneous transceiving operation on one link pair (namely two links) can be indicated, and a communication foundation is laid for subsequent data communication.

The invention relates to a system and method for achieving communication with multiple identical MAC network terminals in a local area network. The system comprises a plurality of target network terminals with identical MAC addresses, request network terminals with different MAC addresses, a network converter and a VLAN switch. The request network terminals are used for sending communication requests to the target network terminals specified to be in communication, the network converter is used for converting initial target MAC addresses into the MAC addresses corresponding to the target network terminals specified to be in the communication and adding VLAN information according to the number of the target network terminals specified to be in the communication, and the VLAN switch is used for stripping the adding VLAN information from communication request message data after the conversion of the network converter and for sending the communication request to the target network terminals specified to be in the communication. The system and method for achieving the communication with the identical MAC network terminals in the local area network of the structure are adopted, the technical problem of the communication with the network terminals with the identical MAC addresses in the local area network can be solved, conflict caused by the identical MAC addresses cannot occur, and the system and method have a wider application range.

The invention relates to the technical field of data backup, in particular to a snapshot technology combined continuous data protection system. The system includes a client, the client is in network connection with the remote mirror image system; the data transmission module is used for transmitting data in a database. the remote mirror image system is in network connection with the backup storagesystem through a local area network; data in the database can be backed up and stored; wherein the backup storage system is sequentially connected with the snapshot technology system and the server host through a network; the snapshot technology system and the remote mirror image system are combined to realize remote backup; according to the invention, data can be arranged through the control system; according to the data backup method and device, the data can be distinguished according to the importance priority and preferentially transmitted according to the importance level through analysis and classification, the phenomenon that important data are lost due to the fact that the data are very disordered during backup is avoided, important data transmission is guaranteed, the backed-up data can be stored in order, and the use requirement can be met.

The invention provides wireless network service access equipment for an airplane passenger cabin. The equipment comprises a server, a detection module, a power supply module and a control module, wherein the server is connected with a wireless network module and a storage module; the wireless network module is used for communication between the server and an external mobile terminal; the storage module is used for storing data; the server reads the corresponding data from the storage module according to requests of an external mobile terminal so as to feed back the data to the external mobileterminal; the detection module is used for detecting and obtaining the flight state information of the airplane; the power supply module is respectively connected with the server, the wireless networkmodule and the detection module group and is used for providing the work power supply; the control module is respectively connected with the power supply module and the detection module, and controlsthe power supply on-off state of the wireless network module according to the flight state information obtained by the detection module. The invention provides a wireless local area network; the external mobile terminal is connected with the wireless local area network and can be used for obtaining prestored data such as video, video, images and characters; the requirements are met; the on-off state of the wireless network module can be controlled according to the flight state information; the flight interference is avoided.

The invention relates to an optical fiber amplifier; especially to an S wave range detached Raman optical fiber amplifier, which is formed by a pump module and a yield module in the field of optical fiber communication. The S wave range detached Raman optical fiber amplifier comprises: an optical isolator, a wavelength-division multiplex device, and a semi-conductor laser. It is characterized in that the signal light in turn through the S wave range optical isolator 1, the wavelength-division multiplex device WDM, the color bias compensation optical fiber module DCF and the wavelength-division multiplex device WDM4; the laser of the pump wave-combining device 6 through the S wave range optical isolator 5 and enters into the wavelength-division multiplex device WDM4 which outputs the signal light.

The invention discloses a vehicle function test method, device and equipment and a computer readable storage medium, and belongs to the technical field of Internet of Vehicles. The method comprises the following steps: acquiring a first analog signal for testing a target function of a vehicle; converting the first analog signal into a first CAN signal under a controller area network CAN protocol used by the vehicle; sending the first CAN signal to a controller corresponding to the target function in the vehicle, wherein the first CAN signal is used for indicating the controller to perform a corresponding action; and receiving a second CAN signal fed back by the controller after executing a corresponding action based on the first CAN signal, and converting the second CAN signal into a second analog signal which is used for determining a test result of the target function. According to the mode, when the vehicle using different CAN protocols is tested, the test of the vehicle function and the determination of the test result can be completed according to the analog signal, and the efficiency of testing the vehicle function is improved.

The invention belongs to the technical field of computers, and particularly relates to a key generation method and device, a computer readable storage medium and terminal equipment. The method is applied to a first node in a preset controller local area network, the first node is any node in the controller local area network, and the method comprises the following steps: generating a first bit sequence; sending the first bit sequence in a bus of the controller area network; receiving a superimposed bit sequence in a bus of the controller area network, wherein the superposed bit sequence is a bit sequence formed by superposing the first bit sequence and the second bit sequence, the second bit sequence is a bit sequence generated by a second node, the length of the second bit sequence is equal to that of the second bit sequence, and the second bit sequence and the first bit sequence are sent in a bus of the controller local area network at the same time; and generating a key according tothe superposed bit sequence.

The invention discloses a Wifi processing method and display equipment, which are used for avoiding the problem that Wifi is not connected back after the display equipment is abnormally restarted, andimproving the user experience and satisfaction. The method comprises the following steps: when a Wifi hourly scanning function is closed and display equipment is abnormally restarted and started, starting a communication process of a wireless local area network driver; and when the communication process of the wireless local area network driver is started, if a Wifi network security access daemonprocess exists, closing the Wifi network security access daemon process.