33results about How to "High data transmission stability" patented technology

Disclosed herein are a method for balancing the quality of a wireless communication channel wherein the quality of the wireless communication channel can be more accurately estimated and adjusted on the basis of the combination of observation results of the number of data frames failed to be transmitted in the past and a received signal strength (RSS), and reliability of data transmission over the channel can thus be increased, and a wireless communication apparatus using the same. The method includes collecting information about whether data frames have been successfully transmitted and information about RSSs of the wireless communication channel, acquiring the number of data frames failed to be transmitted and an average RSS in a predetermined observation period using the collected information, comparing the acquired transmission-failed data frame number with a predetermined threshold value and the acquired average RSS with a predetermined reference RSS, respectively, and estimating the quality of the wireless communication channel and quality degradation factors in detail by performing an AND operation with respect to the comparison results. Therefore, it is possible to stably adjust the channel quality.

A data transmission system and a data transmission method for a Bluetooth interface are provided. The data transmission system includes a central electronic apparatus and a peripheral electronic apparatus. The central electronic apparatus has a central Bluetooth module, and the peripheral electronic apparatus has a peripheral Bluetooth module. Some Bluetooth characteristic information are transmitted between the central Bluetooth module and the peripheral Bluetooth module, wherein the characteristic information indicates a plurality of pieces of buffer size information in the central and peripheral Bluetooth modules. The central and peripheral Bluetooth modules perform a data transmission operation therebetween based on the characteristic information through a central enable flag and a peripheral Bluetooth module enable flag respectively.

The invention discloses a notch antenna with a slot structure and a gateway device with the antenna, which includes a dielectric substrate, an antenna radiation unit is arranged on the upper surface of the dielectric substrate, and the antenna radiation unit includes a radiation patch and is connected with the radiation patch. The microstrip feeder connected to the open end of the bottom of the patch, the surface of the radiation patch is provided with two "L" shaped slits; the lower surface of the dielectric substrate is used for grounding, and the lower surface of the dielectric substrate is provided with special-shaped openings Slot, the irregular slot includes a plurality of rectangular slots, one or both ends of the plurality of rectangular slots are connected to each other according to rules, the relative position of the irregular slot and the antenna radiation unit on the upper surface of the dielectric substrate overlap at least partially. Based on this solution, the filtering performance of the antenna can be improved, the filtering pressure of the gateway device can be reduced, the cost can be reduced, and the stability of data transmission can be improved.

The invention relates to a power grid pollution data collection technology, in particular to a grid pollution data collection system based on the PQDIF standard. The invention solves the problems of poor real-time data collection, poor data transmission stability, slow data transmission speed and poor data sharing in the existing grid pollution data collection system. Grid pollution data network acquisition system based on PQDIF standard, including power quality monitor, carbon footprint power monitor, monitoring master station, database server, client, switch, gateway, coaxial cable; among them, each power quality monitor and The first switch is connected to each other in pairs through coaxial cables to form a mesh topology; each carbon footprint power monitor is connected to the second switch in pairs to form a mesh topology; each client is connected to the fourth Switches are connected to each other in pairs by coaxial cables to form a mesh topology. The invention is applicable to the collection of grid pollution data.

The present disclosure discloses methods and devices for an optical signal encoding and decoding. The optical signal encoding method includes: reading N-ary data bit by bit, and encoding the data into electric signal units: encoding each different digit in the N-ary data into a different electric signal unit, where high level duration and low level duration in the electric signal unit are Ti1, Ti2, . . . , and Tij respectively, i, j, and N are natural numbers, and the different electric signal units are separated by delimiters; and combining the electric signal units corresponding to the N-ary data into a drive signal, where the drive signal is used for being output in a light form. Instable flashing of emitted light of a terminal device is overcome effectively, and information transmission reliability is further improved.

The invention relates to a power grid pollution data collection technology, in particular to a power grid pollution data ring collection system based on the PQDIF standard. The invention solves the problems of poor real-time data collection, poor data transmission stability, slow data transmission speed and poor data sharing in the existing grid pollution data collection system. The grid pollution data ring collection system based on the PQDIF standard includes a power quality monitor, a carbon footprint power monitor, a monitoring master station, a database server, a client, a switch, a gateway, and an optical fiber; among them, each power quality monitor and the first Each switch is connected end-to-end through optical fibers to form a ring topology; each carbon footprint power monitor is connected to the second switch through an end-to-end optical fiber to form a ring topology; each client is connected to the fourth switch through an end-to-end optical fiber to form a ring topology . The invention is applicable to the collection of grid pollution data.

The invention discloses an application of an ERPS protocol on an MPLS network, and relates to the technical field of Ethernet communication. The invention adds an AC main interface to an ERPS main ring, and at the same time uses a VLAN of a sub-interface under the AC main interface as a protocol message The channel controls the ERPS state machine, calculates whether the AC sub-interface in the ERPS ring is blocked / unblocked through the ERPS protocol state machine, and overcomes the VLAN of the data flow to be blocked in the ERPS ring where a sub-interface is added each time Distributed on different sub-interfaces, resulting in too many ERPS rings and wasting system resources, the ERPS protocol is applied to the MPLS network, and the data transmission stability is higher.

The invention discloses a near-field communication modulation depth adaptive method and device and relates to the field of communication. The device comprises a master control chip, a non-contact chip and a first storage zone. The master control chip can control the non-contact chip to output the modulation-free amplitude according to a value of a first register; a numerical value is acquired from a data table or through calculation and written in a second register according to the data table stored in the first storage zone in advance and the measured value of the modulation-free amplitude, the non-contact chip is controlled to output the modulated amplitude according to the value of the second register, and the modulation depth is adaptively adjusted through control over the modulated amplitude. By the adoption of the technical scheme, the modulation depth can be kept within a reasonable range and the stability of data transmission in non-contact communication is improved.

The invention relates to a power grid pollution data analysis technology, in particular to a power grid pollution data tree analysis system based on the PQDIF standard. The invention solves the problems of poor real-time data analysis, poor data transmission stability, slow data transmission speed and poor data sharing in the existing grid pollution data analysis system. Power grid pollution data tree analysis system based on PQDIF standard, including power quality monitor, carbon footprint power monitor, monitoring master station, GIS server, Web server, simulation server, evaluation server, wireless AP, wireless gateway, optical fiber, radio wave channel; among them, each power quality monitor together constitutes a branch of the tree topology, and the first wireless AP and the second wireless AP together constitute the backbone of the tree topology; each carbon footprint power monitor together constitutes a tree topology branches, the third wireless AP and the fourth wireless AP together constitute the backbone of the tree topology. The invention is applicable to the analysis of grid pollution data.