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

When a plurality of user stations (STAs) simultaneously communicate with an access point (AP) through an SDMA (Space Division Multiple Access) channel in a MIMO wireless communication system, these STAs control their respective transmission signals such that each signal is received by only a different one of the plurality of antennas at the AP. (It should be noted that the number of these STAs is equal to or smaller than the number of antennas at the AP.) This eliminates the need for the AP to perform MIMO processing, thereby allowing the AP to properly receive and demodulate the signals even if they differ in carrier frequency and transmission timing, which would otherwise result in communication degradation or failure.

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 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 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 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 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.