261results about How to "Improve communication stability" patented technology

In a wireless communication system for communicating with a plurality of stations at the same point of time with the same frequency using a Space Division Multiple Access (SDMA), wireless resources are allocated by a first decision unit which evaluates performance of each station obtained when the SDMA is used and which determines periods of time to be allocated to groups of stations formed according to the SDMA technique. Using a first evaluation unit and a second evaluation unit to evaluate performance required by each station and each application, the first decision unit allocates the wireless resources to the stations. It is therefore possible that the wireless resources are efficiently allocated to the stations while preventing an event in which the wireless resources are excessive or insufficient for required quality of service.

A communication apparatus exhibiting improved certainty and stability in communication. In a wireless terminal (100) serving as the communication apparatus, a transmission possibility determining part (186) uses an AIFS and a backoff value to control the transmission timing of transport data, and an AIFS managing part (181) adjusts the AIFS value related to the transport data in accordance with an elapsed time from the occurrence of a transmission request of the transport data. In this way, the AIFS value related to any transport data having a long elapsed time from the occurrence of a transmission request of the transport data can be reduced, and a predetermined wait time determined by the AIFS and backoff values also can be reduced. Accordingly, the probability of the transport data being transmitted with a higher priority than the other ones can be raised, whereby the possibility of the transport data being abandoned because of a timeout can be reduced. As a result, the certainty and stability in communication can be improved.

The invention provides a communication method, a communication system, a relay gateway device, an application server and a client side. Data transmission between the application server and the client side is realized by the relay gateway device in the communication method. The method specifically includes that the relay gateway device receives a message from a sender according to communication connection with the sender; the relay gateway device analyzes content of the message, and an acquired analysis result includes a communication protocol of the sender; the relay gateway device assembles the message according to the communication protocol of the sender to acquire a message corresponding to a communication protocol of a receiver; the relay gateway device sends the message corresponding to the communication protocol of the receiver to the receiver according to communication connection with the receiver. By the communication method, the communication system and the relay gateway device, stability and efficiency of communication between the application server and the client side can be improved.

The invention relates to an initiative appointment-making type intelligent elevator dispatching system. The initiative appointment-making type intelligent elevator dispatching system comprises a mobile phone client terminal, a dispatching total server, a local intelligent elevator dispatching server and an elevator controller, wherein the mobile phone client terminal is used for collecting and transmitting user elevator taking information; the dispatching total server is connected with the mobile phone client terminal in a wireless communication mode, receives and distributes the user elevator taking information transmitted by the mobile phone client terminal, and meanwhile transmits feedback information to the mobile phone client terminal; the local intelligent elevator dispatching server is connected with the dispatching total server in a wireless communication mode or a wired internet mode, receives the user elevator taking information distributed through the dispatching total server, obtains an elevator route planning scheme and anticipated waiting time according to the information, and feeds back the elevator route planning scheme and the anticipated waiting time to the dispatching total server; the elevator controller is connected with the local intelligent elevator dispatching server, and controls parking of an elevator according to the elevator route planning scheme transmitted by the local intelligent elevator dispatching server. Compared with the prior art, the initiative appointment-making type intelligent elevator dispatching system has the advantages that congestion of the elevator in concentrated using sections such as morning-evening rush hours is relieved, and the energy consumption of the elevator is saved.

The embodiment of the invention discloses a Bluetooth equipment communication control method, a Bluetooth equipment communication control device, terminal equipment and a storage medium. The method comprises the steps as follows: first Bluetooth equipment receives an information query request sent by second Bluetooth equipment; the first Bluetooth equipment selects a used transmission protocol version according to the information query request, and sends a transmission protocol version model number to the second Bluetooth equipment, for allowing the second Bluetooth equipment to determine a transmission protocol type corresponding to the transmission protocol version model number; and the first Bluetooth equipment and the second Bluetooth equipment build a communication connection based ona transmission protocol type. Therefore, the stability and transmission efficiency of information transmission between the Bluetooth equipment are improved.

The method comprises: when the files in the computer is transmitted to the mobile terminal, in the first, an initialization is executed; selecting a source file to be transmitted to the computer; the communication thread of computer uses signal mechanism to make real-time task communication with the mobile terminal; creating a target file used for writing data in, and opening the target file; the communication thread reads data from source file and packaging it into the writing file signals, and then packages the signals into the data frame in link layer, and sends the data frame to the mobile terminal through serial port; after confirming that the data is successfully written in, the remaining data is transmitted out using same way; after completing the transmission, the computer informs the file system of the mobile terminal to close the target file and to release the serial port and each relevant thread.

The invention discloses a differential GPS based tracked autonomous navigation robot and navigation method thereof. The robot includes a left DC brushless motor, a right DC brushless motor, a left rotary encoder, a right rotary encoder, a dual DC brushless motor driver, a vehicle-mounted antenna, a vehicle-mounted board card, an industrial control computer, a lithium battery pack, a network camera, a front GNSS receiver, a rear GNSS receiver, an image and data transmission radio station, and a 3D laser radar. The navigation method includes: manually and remotely control the robot to move firstly, reading and recording differential GPS data and encoder data in real time, and establishing original trajectory information and saving the original trajectory information as a standard file; correcting and optimizing an original trajectory to obtain a planned trajectory; and finally allowing the industrial control computer to read the differential GPS data, obtaining a pose of the current robot, comparing the pose and the pre-stored trajectory information to obtain a pose error, inputting the pose error into a feedback control law, obtaining a control output, and realizing trajectory tracking. The differential GPS based tracked autonomous navigation robot and navigation method has advantages of accurate positioning, accurate control and high stability.

The invention relates to an electric propulsion redundancy control method for a ship. The method is characterized in that two electric propulsion control systems are arranged, wherein each electric propulsion control system has two control programs. During normal operation, each electric propulsion control system uses one control program to independently work, and at the same time, two programmable logic controllers mutually and regularly receive the operational data of the other control program. When a control failure occurs, normally one programmable logic controller undertakes the control operation of the other programmable logic controller so as to simultaneously operate the two control programs. When the control failure recovers, the programmable logic controller with failure recovery sends a signal to the control system operating normally, the programmable logic controller operating normally sends operational data to the recovered programmable logic controller, and the recovered programmable logic controller takes over the system control. When a control core of any one electric propulsion control system fails, the normal propulsion operation of the ship is not influenced, and the safety and the stability of the ship are improved.

This disclosure discloses a tag label producing apparatus comprising: at least one feeding roller; a printing device; and an apparatus antenna; and a coordination control portion that controls in coordination the feeding roller, the printing device, and the apparatus antenna, such that information transmission/reception is performed between an RFID circuit element and the apparatus antenna when an IC circuit part of the RFID circuit element provided to a tag medium is fed downstream in a transport direction from a segment from a nearest roller to the apparatus antenna along a feeding path.

The embodiment of the invention provides a method and a device for switching antennas, a storage medium and electronic equipment. The method for switching the antennas comprises the following steps ofobtaining historical geographical locations of the electronic equipment at multiple historical times, and property parameters of each antenna at each historical geographical location; establishing the corresponding relationship between each historical geographical location and the property parameter of each antenna; according to the current geographical location of the electronic equipment and the corresponding relationship, determining the first antenna from the multiple antennas; switching the first antenna as a main collection antenna of the electronic equipment. The method for switching the antennas has the advantages that the electronic equipment can select the first antenna from the multiple antennas according to the current geographical location of the electronic equipment and thehistorical data, and the first antenna is switched as the main collection antenna, so that the antenna with better property can be selected as the main collection antenna, and the stability of the electronic equipment in communication is improved.

Information processing method and device applied to a first electronic device are disclosed. The first electronic device can establish a communication connection with a second electronic device, and the method includes: judging whether a communication between the first electronic device and the second electronic device meets a preset condition to obtain a first judgment result; and in a case where the first judgment result indicates that the communication between the first electronic device and the second electronic device does not meet the preset condition, obtaining a second communication address of the second electronic device and obtaining a third communication address of a third electronic device, where the third electronic device can establish a communication connection with the second electronic device such that a communication connection can be established between the second electronic device and the third electronic device based on the second communication address and/or the third communication address.

The embodiment of the invention provides a method and a device for Ethernet redundancy control. The method comprises the following steps: a master station acquires all slave stations not sending a feedback data packet; the master station determines the slave station nearest to a port of the master station in transmission distance from all the slave stations not sending a feedback data packet as an offline slave station; and the master station sends a service data packet via the port nearest to the offline slave station in transmission distance to the slave stations between the offline slave station and the port, and sends a service data packet via the other port to the offline slave station and the slave stations between the offline slave station and the other port. Thus, when one slave station fails or is offline, the master station adjusts the sending sequence of data packets in time, so that a system can effectively avoid the offline slave station when issuing data packets, rapid recovery of the system is achieved, and the communication efficiency and stability of the system are enhanced.

The invention relates to the unmanned aerial vehicle battery technology field, and discloses an intelligent battery used for an unmanned aerial vehicle. The intelligent battery comprises a housing, a battery management board detachably disposed in the housing, and an electric core group capable of realizing rapid charging. The battery management board is provided with a battery management unit used for the management of the battery, is connected with the MOS tube of the battery management unit, is connected with the power supply input/output interface of the MOS tube, and is connected with the CAN bus interface of the battery management unit. The CAN bus interface is connected with the main control system of the unmanned aerial vehicle for CAN bus communication. The electric core group is electrically connected with the MOS tube. The intelligent battery used for the unmanned aerial vehicle is advantageous in that by arranging the CAN bus interface, the CAN bus communication with the main control system of the unmanned aerial vehicle is realized, and a problem of instable data transmission between the intelligent battery and the main control system of the unmanned aerial vehicle is prevented, the stability of the communication is improved, and the safety and the reliability of the flight of the unmanned aerial vehicle are guaranteed.