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A communication training method

A training method and a technology of training signals, which are applied in the field of communication training, can solve problems such as reducing communication efficiency, inconsistent operating frequencies of equipment, and reducing the quality of carrier signal transmission, so as to achieve the effect of improving transmission quality

Active Publication Date: 2018-04-24
DALIAN POWER SUPPLY COMPANY STATE GRID LIAONING ELECTRIC POWER +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since each carrier device is independent of each other, the operating frequency of each device is usually inconsistent, which will reduce the transmission quality of the carrier signal and reduce the communication efficiency.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] This embodiment provides a communication training system, including: a head-end device 12, a relay device 13 and a terminal device 14, the head-end device 12 is connected to the relay device 13 through a cable, and the relay device 13 is connected to the terminal device 14 through a cable ; The head-end device 12, the relay device 13 and the terminal device 14 may be devices provided with a carrier modulation chip, such as a power modem.

[0018] There are many modulation methods of the carrier signal. The head-end equipment 12, the terminal equipment 14 and the relay equipment 13 in this embodiment can generate the carrier signal by means of OFDM modulation, and determine the operation of the carrier signal according to the transmission quality of the carrier signal. frequency. The OFDM modulation method is a multi-carrier modulation method. This method can divide a carrier into many sub-carriers with narrow bandwidth within a certain frequency range. The signal is en...

Embodiment 2

[0034] This embodiment provides a communication training method, such as image 3 The method shown includes:

[0035] S1, the head-end device sends a carrier training signal according to a preset frequency;

[0036] S2. The relay device and the terminal device determine their own signal sending frequency according to the frequency of the carrier training signal. The head-end device, the relay device and the terminal device may be devices provided with a carrier modulation chip, such as a power modem.

[0037] There are many modulation modes of the carrier signal. In this embodiment, the head-end device, the terminal device and the relay device can generate the carrier signal by using the OFDM modulation mode, and determine the operating frequency of the carrier signal according to the transmission quality of the carrier signal. The OFDM modulation method is a multi-carrier modulation method. This method can divide a carrier into many sub-carriers with narrow bandwidth within...

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Abstract

The invention provide a communication training method. The method comprises the following steps that head end equipment sends a carrier wave training signal according to a preset frequency; relay equipment and terminal equipment determine a self-signal sending frequency according to a frequency of the carrier wave training signal. By using the communication training method provided in the invention, when a communication system processes uplink data and downlink data, the head end equipment, the relay equipment and the terminal equipment use a same working frequency so that transmission quality of the uplink data and the downlink data is increased.

Description

technical field [0001] The invention relates to the field of data communication, in particular to a communication training method. Background technique [0002] Power line carrier communication is a unique communication method of power system and belongs to private network communication. Carrier communication is divided into narrowband carrier communication and broadband carrier communication. Narrowband carrier communications have poor networking capabilities, and the data communication bandwidth provided by narrowband carriers cannot meet the information transmission bandwidth requirements of the "Technical Guidelines for Distribution Network Planning and Design". The operating frequency of broadband carrier communication is from 2MHz to 34MHz, the bandwidth of the physical layer is 200Mbps, and the bandwidth of the application layer is 90Mbps. It can be received reliably, even when the distribution network is severely disturbed, it can provide high bandwidth and ensure ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B3/54
CPCH04B3/54
Inventor 杨万清宋文峰郭兆成李春平姜学朴李君秋王新宁宫子明田晓明董柏辰
Owner DALIAN POWER SUPPLY COMPANY STATE GRID LIAONING ELECTRIC POWER