73results about How to "Avoid no communication" patented technology

The invention discloses a method for switching a terminal between access network elements, and a mobile management network element. A terminal is switched to a second access network element from a first access network element; if the switching causes a change of a service gateway, the terminal is informed to close an ISR mode so as to avoid the problem that the uncorrespondance between an ISR mechanism at the terminal and an ISP mechanism on the network side results in the terminal communication failure after the terminal is spanned over a mobile management network element; and after the ISR mechanism at the terminal is closed and the terminal is switched over the mobile network element, the terminal can be attached to the network again so as to realize the normal communication.

The invention provides a method of preventing media access control address drifting and a network processing device. The method comprises the steps of: receiving a first message by a network access device through a first port thereof; judging whether the first message needs to be discarded or not through the network access device according to a current ACL (access control list) rule; when judgment that the first message does not need not to be discarded is made, forwarding the first message according to a target MAC (media access control) address, and judging whether a first table entry corresponding to a first source MAC address and first VLAN (virtual local area network) information of the first message exists in an MAC address list; and when judgment that no first table entry exists is made, establishing a corresponding table entry in the MAC address list according to the first message, and establishing a first ACL rule of a message for indicating a source MAC address which is lost outside the first port and is received by other ports as a first MAC address and VLAN information as first VLAN information. The function of preventing MAC address drifting can be realized easily.

The invention discloses a network quality monitoring method, device and system, used for performing network quality monitoring in a condition that the network pressure is not increased. The method comprises the steps of: establishing first communication links between a client side and a first proxy server, wherein the first communication links include a data link and a test link; sending a test data packet to the first proxy server at the first frequency through the test link, receiving response information of the test data packet, and obtaining the time difference of the response informationreceiving time and the test data packet sending time as network delay data; detecting the packet loss probability of a communication data packet on the data link; when the packet loss probability of the communication data packet on the data link is greater than a first threshold value, sending the test data packet to the first proxy server at the second frequency through the test link, and detecting the packet loss probability on the test link, wherein the second frequency is greater than the first frequency; and, when the network delay data is greater than a second threshold value or the packet loss probability on the test link is greater than a third threshold value, determining that the first communication links have a problem.

The invention provides a file transmission method and device based on the Internet of things. The method comprises the steps of receiving a login request sent by network access equipment and carrying an equipment account and an equipment password, and establishing a first long connection channel with the network access equipment after the login is authorized; receiving and storing a first file uploaded by a user terminal; generating a first index identifier corresponding to the stored first file and returning the first index identifier to the user terminal; receiving a first file transmission request sent by the user terminal and carrying the equipment account and the first index identifier; sending the first file transmission request to the network access equipment via the first long connection channel corresponding to the equipment account; receiving a download request sent by the network access equipment and carrying the first index identifier; and searching the first file corresponding to the first index identifier and transmitting the first file to the network access equipment. The file transmission method and device based on the Internet of things solve the problem that a file cannot be directly transmitted in the absence of a public network address.

The embodiment of the invention discloses a cell selection method. The user equipment in a cluster private network stores a PCI list comprising all cell PCI in the cluster private network issued by a base station in the cluster private network, the user equipment carries out cell searching, the PCI of a first strongest cell is obtained, when the PCI of a first strongest cell is inquired in the PCI list, the first strongest cell is judged as a residential cell, the reading of the system message of the first strongest cell is continued, and the cell selection is completed. On the contrary, the first strongest cell is judged as a non-residential cell, the cell selection is ended. The embodiment of the invention also discloses an automatic neighbor cell relation (ANR) configuration method, user equipment carries out cell searching, a third strongest cell is obtained, and when the third strongest cell is determined as the neighbor cell of a service cell, the system message of the third strongest cell is read directly and reported to a service base station such that the service base station carries out automatic neighbor cell relation configuration.

The invention provides a ring network configuration detection method and device. The method comprises the following steps that an adjacent node receives an ERPS protocol message sent by a first node, wherein if the first node is a master node, the ERPS protocol message carries master port identification and direct connection receiving identification, and if the first node is not the master node, the ERPS protocol message carries common port or adjacent port identification and forwarding receiving identification; the adjacent node judges whether port role identification carried by the ERPS protocol message is not the master port identification and receiving mode identification carried by the ERPS protocol message is the direct connection receiving identification; if yes, the adjacent node determines that configuration of the port role identification of the adjacent port is wrong. The ring network configuration detection method and device solves the technical problem that a ring network manager cannot know whether configuration of nodes in a ring network is right or not in the prior art, ring network communication failure caused by wrong configuration of the nodes in the ring network is avoided, and the communication quality of the ring network is guaranteed.

The disclosed method to let terminals with different bandwidth capacity access wireless communication system comprises: terminal obtains the current bandwidth capacity of wireless system network side management area according to system signaling or the pre-set message, then hereby processes self bandwidth capacity to access the wireless system. This invention ensures the terminal with support capacity to access LTE system for communication.

The invention relates to a power-on and power-off control system of a pure electric heavy truck. The power-on and power-off control system comprises a chassis distribution box, a cab distribution box,a vehicle control unit, a key switch, a main switch, relays, a motor controller, a high-voltage distribution box and a four-in-one controller. In a whole vehicle power-on process, power-on of all high-voltage controllers is managed by the vehicle control unit in a unified mode, time sequence judgment of all the controllers is not needed, and an effect that the vehicle control unit serves as a whole vehicle brain is achieved. In the power-off process of the whole vehicle, a low-voltage power supply is controlled in the mode that the vehicle control unit controls the relays, and normal work before the relays in all the high-voltage controllers are disconnected is guaranteed. A problem that each high-voltage controller has no low-voltage power supply and cannot communicate after a key door is closed is avoided; and when an ON gear of the key door is suddenly powered off, the situation that each high-voltage controller is accidentally powered off is avoided, and a development period of the controller is shortened.

The invention relates to a power-on and power-off control method of a pure electric heavy truck. Related peripheral hardware comprises a chassis distribution box, a cab distribution box, a vehicle control unit, a key switch, a main switch, relays, a motor controller, a high-voltage distribution box and a four-in-one controller. In a whole vehicle power-on process, power-on of all the high-voltagecontrollers is managed by the vehicle control unit in a unified mode, time sequence judgment of all the controllers is not needed, and the effect that the vehicle control unit serves as a whole vehicle brain is achieved. In the power-off process of the whole vehicle, a low-voltage power supply is controlled in the mode that the vehicle control unit controls the relays, and normal work before the relays in all the high-voltage controllers are disconnected is guaranteed. A problem that each high-voltage controller has no low-voltage power supply and cannot communicate after the key door is closed is avoided; and when an ON gear of the key door is suddenly powered off, the situation that each high-voltage controller is accidentally powered off is avoided, and a development period of the controller is shortened.

The embodiment of the invention provides an IP address management method and an edge cluster. Specifically, a virtual IP address allocation function of a main service process is converted into an allocation function for a virtual IP address field; therefore, the edge cluster is bound with the distributed virtual IP address field. And the edge cluster selects the virtual IP address from the bound virtual IP address field through the proxy service process and distributes the virtual IP address to the newly-built virtual equipment in the cluster, so that the problem that the virtual equipment cannot communicate due to conflict of the virtual IP addresses distributed by the virtual equipment in different edge clusters is avoided.

The invention provides a communication equipment control method and device, equipment and a storage medium, and relates to the technical field of communication equipment. The method comprises the following steps: monitoring heartbeat packets of a plurality of gateways after binding with the plurality of gateways; when it is determined that any gateway fails according to the monitoring result, disconnecting the connection with the failed gateway; distributing the equipment information of the communication equipment managed by the faulted gateway to the gateway which normally works in the plurality of gateways; and communicating with the communication equipment managed by the gateway sending the fault through the gateway working normally. In the invention, when one gateway has a fault, another gateway is used to carry out communication. Mutual communication among a plurality of devices can be achieved, and the problem that communication cannot be carried out due to the fact that the gateway breaks down is avoided.

The invention relates to the technical field of Bluetooth communication, in particular to a method and a Bluetooth device for performing pairing service with a mobile terminal. The method comprises: the Bluetooth device established a connection with a mobile terminal; the Bluetooth device receives the request sent by the mobile terminal, and judges the type of the request; if it is a pairing request, the Bluetooth device binds the mobile terminal, and judges whether the binding loss flag bit is set; if yes, the mobile terminal is reconnected after the connection with the mobile terminal is disconnected; otherwise, the Bluetooth device communicates with the mobile terminal normally; if the request is an encryption request, whether the mobile terminal has been bound or not is judged according to the encryption request, if yes, the Bluetooth device communicates with the mobile terminal normally and ending; otherwise, the Bluetooth device sends a request to apply for binding to the mobileterminal, and sets a missing binding flag bit to receive the request sent by the mobile terminal. By the invention, the upper layer can obtain the service again through the Bluetooth device, thus avoiding the doubt that the communication cannot be carried out after the connection, and the user experience is good.

The invention provides a big data cluster expansion method and device. The big data cluster expansion method comprises the following steps: calling an Ambari tool for managing a cluster to be expandedto execute the following steps: modifying the configuration of at least one expansion node; installing an Ambari Agent on at least one expansion node; registering at least one expansion node to a to-be-expanded cluster; installing a component for at least one expansion node according to the to-be-expanded cluster; and calling Ansible Playbook, and completing the expansion operation of the to-be-expanded cluster according to the above steps and the node identifier of the at least one expansion node. According to the scheme, the cluster expansion difficulty can be reduced.

The invention discloses a communication information switching method. The method includes the steps that firstly, communication signals of a current mobile device are detected, and the intensity of the communication signals is obtained; then, the obtained intensity of the communication signals is compared with the preset intensity of the communication signals, and a comparison result is obtained; then, when the obtained intensity of the communication signals is greater than or equal to the preset intensity of the communication signals, the mobile device does not carry out processing; then, when the obtained intensity of the communication signals is smaller than the preset intensity of the communication signals, the mobile device switches the current communication state to the internet communication state. The technical effects that when the communication signals are weak, the communication modes of the communication device are switched, normal communication is ensured, and use is convenient are achieved.

The embodiment of the invention discloses a message transmission method and device, a terminal and a storage medium, and belongs to the technical field of communication. The method comprises: sendingan instant messaging message to a second terminal, wherein the instant messaging message is a message input in a first chat interface, and the first chat interface is an interface of an instant messaging application program operated by a first terminal and the second terminal; when the transmission mode switching condition is met, switching the first chat interface into a second chat interface; obtaining a first communication message input in the second chat interface; and sending the first communication message to a second terminal through connection with the second terminal, wherein the second terminal is used for displaying the first communication message in a second chat interface of the home terminal. In the embodiment of the invention, when the network state is poor, the terminals can be switched to use wireless protocol technologies such as Bluetooth, LoRa or LPWAN for message transmission, so that the problem that communication cannot be performed when the network state is pooris avoided.

The invention belongs to the field of communication, and provides a method and device for configuring IP addresses and port numbers of two systems. The method comprises the steps that first communication connection is built between the first system and the second system through the first IP address and the first port number, wherein the first IP address and the first port number are a default IP address and a default port number; the first system sends negotiation information to the second system through the first communication connection, wherein the negotiation information carries the secondIP address and the second port number; whether or not the second IP address and the second port number can communicate is judged by the second system, and if communication is available, negotiation pass information is sent to the first system by the second system; second communication connection is built between the first system and the second system through the second IP address and the second port number; if the second communication connection is built successfully, communication testing is conducted between the first system and the second system to determine normal communication of the second communication connection.

The invention discloses an information acquisition, calculation and transmission architecture based on fog computing, which is applied to an Internet of Vehicles system. The architecture at least comprises a request terminal, a sending terminal, a fog node and a cloud node, wherein the fog node and the cloud node are used for information calculation and transmission. The method comprises the following steps: 1, vehicle information collection: enabling all vehicles periodically to send own information to surrounding vehicles and fog nodes where the vehicles are located to form a vehicle topological graph; 2, requesting service by the vehicle A: selecting a vehicle B which wants to obtain information by the vehicle A, and sending the request information to the vehicle B under the assistanceof a fog node; 3, after the vehicle B parses the request, if the vehicle B agrees to share the information, enabling the vehicle B to send the information to the vehicle A under the assistance of thefog node; and 4, information transmission routing: enabling the cloud node to assist the fog node to select an optimal transmission path. The invention provides a scheme of cooperative driving betweenvehicles, and a fog node assisted calculation and transmission method is adopted to realize rapid information interaction between vehicles.

The invention relates to a method for realizing self-adaptive load balancing through multi-channel connection of an intelligent management unit. The method comprises the following steps of: importingan in-situ protection device model into a system, and enabling a balance factor N to be equal to 0; initializing a self-adaptive load balancing mode; taking an unconnected in-situ protection device, and newly starting a communication service by the general control program; obtaining remote signaling and remote measuring points of the device, and summing the remote signaling and remote measuring points with remote signaling and remote measuring points managed by the current communication service; the master control program judges whether the total telemetry and telesignalling point number of the current communication service management exceeds a threshold value or not; the current communication service is connected with the localized protection device, and remote signaling and remote measuring points managed by the current communication service are updated; and monitoring the operation of all communication services until the end. Load balance of the on-site protection intelligent management unit is achieved, the device can be upgraded independently, configuration is simple, manual intervention is not needed, and the single-point fault risk of communication service of a centralized architecture is avoided.

The invention discloses a flow control method and a related device. When a server receives a published message sent by a client, the server queries a window value of a flow control window of the client and compares the window value with a preset window threshold; when the window value is equal to the window threshold, the published message is refused to receive; and when the window value is greater than the window threshold, the window value is decreased by a preset value, and the published message is processed. When the client needs to send a published message to the server, the client queries a window value of a flow control window of the client and compares the window value with a preset window threshold; when the window value is equal to the window threshold, the published message is paused to send to the server; and when the window value is greater than the window threshold, the window value is decreased by a preset value, and a published message is sent to the server. According to the application, the problem that the server cannot process the message sent by the client in time and cannot communicate normally due to the fact that the message sending speed of the client is toohigh when the message is transmitted between the client and the server can be avoided.

The invention provides a bus network, a control system and a crane. The bus network comprises a bus, a main controller, a super-lift controller, a first terminal resistor, a second terminal resistor, a control switch and a third terminal resistor, wherein the main controller and the first terminal resistor are fixedly connected with the bus; the super-lift controller and the second terminal resistor are detachably connected with the bus; the control switch and the third terminal resistor are connected with each other in series and then connected with the bus, and are located between the main controller and the super-lift controller; when the super-lift controller is connected with the bus, the control switch automatically switches off; and when the super-lift controller and the second terminal resistor are disconnected with the bus, the control switch automatically switches on. According to the technical scheme provided by the invention, a communication protocol is simplified, the working amount of programming is reduced, and the problem that the communication of a network is cut off after a super-lift is detached can be solved.

The invention discloses an initialization configuration method for an electronic device and the electronic device. The initialization configuration method for the electronic device comprises the following steps of inputting a system voltage in a main control unit and a plurality of first functional units to supply power; performing initial program configuration on the main control unit; supplying power to a second functional unit through control of the main control unit subjected to the initial program configuration; and configuring communication functions meeting a communication protocol of a first bus for the powered first functional unit and second functional unit through the main control unit. With the adoption of the method and the device, the problem that certain functional units in the electronic device cannot communicate because the functional units are configured with the communication functions when being not powered can be avoided.

The invention provides a vehicle office system. The vehicle office system comprises a mobile phone, a vehicle-mounted system, a mobile phone storing seat and a seat body mounting assembly, wherein thevehicle-mounted system comprises a shell body, a vehicle-mounted controller, switching switches and a display information communication module, the shell body is internally provided with the vehicle-mounted controller, the first switching switch, the second switching switch and the display information communication module, the surface of the shell body is provided with a display screen in an embedded mode, and the input end of the display screen is electrically connected with the movable end of the first switching switch; and the seat body mounting assembly comprises a mounting box, the surface of the mounting box is provided with a sliding rail, the mounting box is internally provided with an elastic pulling mechanism located at one end of the sliding rail, the mounting box is internallyprovided with an automatic pulling mechanism located at the other end of the sliding rail, and the elastic pulling mechanism includes a central pillar, a coil spring, an isolating cylinder, a rotating cylinder and a first pulling rope. The vehicle office system solves the problem that the displaying speed of contents of a mobile phone is slow on a display screen of a vehicle-mounted system due tothe fact that the mobile phone must be in Bluetooth communication and data exchange with the vehicle-mounted controller in the prior art.

The invention provides a method of preventing media access control address drifting and a network processing device. The method comprises the steps of: receiving a first message by a network access device through a first port thereof; judging whether the first message needs to be discarded or not through the network access device according to a current ACL (access control list) rule; when judgment that the first message does not need not to be discarded is made, forwarding the first message according to a target MAC (media access control) address, and judging whether a first table entry corresponding to a first source MAC address and first VLAN (virtual local area network) information of the first message exists in an MAC address list; and when judgment that no first table entry exists is made, establishing a corresponding table entry in the MAC address list according to the first message, and establishing a first ACL rule of a message for indicating a source MAC address which is lost outside the first port and is received by other ports as a first MAC address and VLAN information as first VLAN information. The function of preventing MAC address drifting can be realized easily.

The embodiment of the invention provides a controller board card for a reactor protection system of a nuclear power plant and a control method. The controller board card comprises a memory and a processor. The memory is used for storing application information including a unique address of a current controller board card, information of a controllable device of the current controller board card, and information of a function set for a port of the controllable device by the current controller board card. The processor is used for setting an address for the port of the controllable device according to the unique address of the current controller board card after the current controller board card is inserted into the controllable device and setting the function for the port of the controllable device based on the information of the function set for the port of the controllable device. Therefore, the types and the number of the controller board card as well as the spare part number of the controller board card can be reduced; and management and maintenance of the reactor protection system of the nuclear power plant can be simplified.

The invention provides a communication method between an electric energy meter and a communication module. The method includes following steps: S1, a type information set of the communication module and a communication protocol set of the communication module are arranged in the electric energy meter, and the electric energy meter sends a data-reading command to the communication module; S2, if the communication module does not respond to the data-reading command, S7 is entered; and if the communication module responds, a next step is entered; S3, whether a universal data frame format responded by the communication module is legal is determined; if not, S7 is entered; and if yes, a next step is entered; S4, whether the type of the communication module is legal is determined; if not, S7 isentered; and if yes, a next step is entered; S5, whether a communication protocol of the communication module is legal is determined; if not, S7 is entered; and if yes, a next step is entered; S6, ifthe communication module is matched with the electric energy meter, S8 is entered; S7, if the communication module is not matched with the electric energy meter, the process is ended; and S8, the process is ended. According to the method, the adaptability and the universality between the communication module and the electric energy meter are improved.

The invention discloses an information source connection display method, device and equipment and a computer readable storage medium, and the method comprises the steps: determining a local interfacewhich exists in an intelligent terminal and is matched with an equipment interface of to-be-connected equipment so that the connection matching between equipment can be automatically carried out; using the successfully matched equipment interface of the to-be-connected equipment as a target equipment interface and connecting the target equipment interface with the intelligent terminal when the target equipment interface in the working mode, so that the problem that the intelligent terminal cannot communicate normally after being connected with the interface in a non-working mode is solved. Byadding the interface information which is successfully matched and connected this time to the local information source configuration menu to be displayed, the intelligent terminal can automatically present the currently connected signal source.

The invention relates to the technical field of communication, in particular to a multi-terminal audio and video instant messaging method and system, and the system comprises a server and terminals. The server is used for receiving the connection establishment request sent by the terminal, after the connection establishment request is responded, a communication protocol is upgraded to a WebSocket protocol from an HTTP protocol, and the server communicates with the terminal in real time; the server is also used for gathering a plurality of terminals for real-time communication, creating a room for unified management, and sending a socket Id of a new terminal to other terminals in the room when the new terminal is added into the room; the terminal is used for sending a connection establishment request to the server; the server is also used for receiving socket Id of other terminals and sending an offer to the other terminals to request to establish connection; receiving the offer sent by the other terminal, and replying to the answer to establish connection with the other terminal; the terminals and the server and the terminals are interacted through signaling. According to the scheme, the communication quality can be effectively ensured, and the cost is reduced.

The invention discloses a turnout control system based on an aerospace train-ground integrated network, and the system comprises turnout equipment, a train and a control center, and achieves the purpose of automatically controlling the state of a turnout through the real-time data interaction among the turnout equipment, the train and the control center. On one hand, data can be transmitted in real time in the turnout control process, so that sections do not need to be arranged, and equipment investment cost is saved; and on the other hand, the problem that normal communication cannot be carried out in remote areas can be effectively avoided based on the air-air-vehicle-ground integrated communication network, and the reliability of the turnout control process is improved. In addition, theinvention further provides turnout equipment having the same technical effect of the system.