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68results about How to "Extend communication time" patented technology

Connection method and device for binaural Bluetooth earphone

The invention discloses a connection method for a binaural Bluetooth earphone. The binaural Bluetooth earphone comprises a first Bluetooth earphone and a second Bluetooth earphone. The method comprises the steps of carrying out alternate connection with the first Bluetooth earphone and the second Bluetooth earphone through utilization of a pre-stored first Bluetooth address and a second Bluetooth address; obtaining residual electric quantities of the first Bluetooth earphone and the second Bluetooth earphone; determining a master earphone and a slave earphone according to the residual electric quantity of the first Bluetooth earphone and the residual electric quantity of the second Bluetooth earphone; and establishing Bluetooth connection with the determined master earphone through utilization of a Bluetooth address corresponding to the determined master earphone, and controlling the determined master earphone to be connected with the determined slave earphone. According to the technical scheme provided by the invention, the master earphone and the salve earphone are smartly switched, the power consumption of a system is reduced, a mobile phone can be flexibly connected with the earphone with the relatively high residual electric quantity, the communication time of the binaural wireless earphone is prolonged, and the user experience is improved.
Owner:GEER TECH CO LTD

Multiprocessor real-time simulation platform

The present invention relates to a multi-processor satellite real-time simulation platform which consists of three or more than three ARM processors, and two or more than two DSP processors with an FPGA as an intermediate memory. The ARM1 is used as the computer of the simulation satellite control center; the ARM2 is used in the space environment of the simulation satellite; the ARM3 is used for the kinetic calculation of the satellite; the DSP1 is used for completing the calculation of a sensor model; the DSP2 is used for completing the calculation of an actuating mechanism; the ARM1 sends data to the DSP1 so as to acquire instructions; the DSP1 sends the acquired data instructions to the ARM2 and the ARM3, fetches relevant data from the FPGA, and transmits the data to the ARM1; the ARM1 completes the calculation according to the read data, and acquires the corresponding attitude orbital parameters; if the parameters satisfy the requirements, the satellite enters the normal mode; if the parameters do not satisfy the requirements, the ARM1 sends control instructions to the DSP2 so as to control the actuating mechanism; the DSP2 transmits the corresponding data to the ARM2 and the ARM3 through the FPGA after completing the calculation, until the attitude orbit can satisfy the corresponding requirements. The platform simplifies the complexity of the system, lowers the difficulty of the simulation, and improves the real-time performance of the simulation.
Owner:BEIHANG UNIV

Serial communication interface time sharing multiplex device based on programmable logic controller

The invention relates to a serial communication interface time sharing multiplex device based on a programmable logic controller, which is characterized in that one RS-232C interface of a programmable logic controller (PLC) is simultaneously connected with two or more than two pieces of equipment carrying out communication through the RS-232C interface. ( wherein RS refers to the recommended standard, 232 refers to the identifier and C refers to the last revision) and belongs to the technical field of automatic control equipment. The RS-232C interface on the programmable logic controller in the device is firstly connected with the RS-232C interface of a first RS485/RS232C converter; the RS485 interface of the first RS485/RS232C converter is connected with two RS485/RS232C converters in parallel; the two RS485/RS232C converters are respectively connected with external equipment carrying out communication with different programmable logic controllers through the normally open contact and the normally closed contact of a relay. In the invention, the RS-232C interface of a PLC native is simultaneously connected with two or more than two pieces of equipment carrying out communication through the RS-232C interface, and thereby, the hardware cost of a communication port expansion module is saved.
Owner:AVIC BEIJING CHANGCHENG AVIATION MEASUREMENT & CONTROL TECH INST +1

Pairing method and device for user equipment and server

The invention relates to a pairing method and device for user equipment and a server. The method comprises the following steps: detecting the type of main machine equipment paired with the user equipment at present and detecting whether main machine equipment communicated with the user equipment in type of a gateway around the user equipment is available or not; when the type of the main machine equipment paired with the user equipment at present is an intelligent terminal and at least one main machine equipment communicated with the user equipment in type of the gateway around the user equipment is available, determining the main machine equipment in type of the gateway paired with the user equipment in the at least one main machine equipment in type of the gateway; sending a pairing command to the main machine equipment in type of the gateway paired with the user equipment, wherein the main machine equipment in type of the gateway is paired with the user equipment according to the pairing command. According to the technical scheme, over-long communication time of the user equipment and the intelligent terminal can be avoided, the power consumption of the intelligent terminal is reduced, and the standby duration of the intelligent terminal is prolonged as much as possible.
Owner:XIAOMI INC

Spectrum sensing and distributing method and system based on ground digital video broadcasting frequency band

InactiveCN104104457ASolve the problem of image interferenceLow costTransmission monitoringNetwork planningCognitive userFrequency spectrum
The invention discloses a spectrum sensing and distributing method and system based on the ground digital video broadcasting frequency band. An energy detection algorithm and a cyclic prefix algorithm are loaded in a base band processing module. The frequency band can be detected by setting the energy threshold value according to the energy detection algorithm. The energy detection algorithm is used for detecting the frequency band which is not occupied by cognitive users. The cyclic prefix algorithm is specially used for detecting a DVB-T signal. In the frequency band occupied by the cognitive users, whether the frequency band is reoccupied by an authorized user or not can be detected according to the cyclic premix algorithm, and if the authorized user is detected, the cognitive users stop occupying the frequency band at once, and interference with the authorized user is avoided. By means of the spectrum sensing and distributing method and system, full-band detection can be conducted on the DVB-T frequency band, self-adaptive frequency band switching can be achieved, and the idle frequency band can be accurately found in real time and can be distributed to all the cognitive users for use. On this basis, the authorized user can be detected, and the cognitive users can exit in time and switch to other idle frequency bands.
Owner:ZHEJIANG UNIVIEW TECH CO LTD

Traveling vehicle communication method and device based on clustering routing protocol and medium

The invention discloses a traveling vehicle communication method based on a clustering routing protocol. The traveling vehicle communication method comprises the steps of acquiring the traveling direction of each traveling vehicle in a target road; clustering the traveling vehicles traveling in the same direction according to a preset range; determining a target vehicle serving as a cluster head according to the clustering condition; and enabling the target vehicle to be in communication connection with each driving vehicle according to the communication rule. Due to the fact that the traveling vehicles traveling in the same direction can be kept within the preset range for a longer time, the communication time between the traveling vehicles in the clusters is prolonged, the stability of the communication state between the traveling vehicles can be improved, the communication success rate is improved, and the communication quality of the whole Internet of Vehicles is improved. The invention further discloses a traveling vehicle communication device based on the clustering routing protocol and a computer readable storage medium which have the above beneficial effects.
Owner:GUANGDONG UNIV OF TECH

Method and system for adding video friend-making connection duration, storage medium and electronic device

The invention discloses a method and a system for adding video friend-making connection duration, a storage medium and an electronic device, and relates to the field of video friend-making of webcasts. The method comprises the steps of, by a server-side, grouping users based on user information of all the users who initiate video friend-making requests and building a display image for each user group; showing the user group display image of each user group to users by the server-side, and displaying all the user IDs and all the user head portraits of the user group corresponding to the user group display image when a user clicks the user group display image; after the server-side monitors that a user clicks a user ID or a user head portrait, building video communication connection betweenthe users; and if the server-side judges that the user gives a virtual present to the opposite side within an appointed duration, adding the video friend-making duration based on the amount required by the virtual present. The method for adding the video friend-making connection duration can prolong the video communication time of the video friend-making on the basis of guaranteeing the operational cost of the server-side, and further improves the user experience obviously.
Owner:WUHAN DOUYU NETWORK TECH CO LTD
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