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Method for network congestion control of power line carrier communication

A technology of power line carrier and communication network, applied in the direction of data exchange network, distribution line transmission system, electrical components, etc., can solve problems other than communication lines, and achieve the effect of ensuring safety and reliability

Inactive Publication Date: 2017-06-09
JIANGSU LINYANG ENERGY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Since the main function of the power line carrier communication channel is to transmit power, it is not designed for communication, so it is not an ideal communication line

Method used

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  • Method for network congestion control of power line carrier communication
  • Method for network congestion control of power line carrier communication
  • Method for network congestion control of power line carrier communication

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Embodiment Construction

[0020] Describe the present invention in detail below in conjunction with accompanying drawing:

[0021] combine Figure 4 As shown, before sending data, initialize the NB (backoff times) and BE (binary exponent) variables in CSMA / CA, set NB to 0, set BE to MinBE (minimum value of binary exponent), and prioritize the data judge. If it is judged that the data is high-priority data, enter the high-priority contention window, then start the conflict avoidance mechanism, wait for an avoidance time, the avoidance time is random (CW) (random number generated according to the contention window CW), and perform physical layer monitoring PCS (physical carrier sense). When the channel is confirmed to be idle, it will enter the data sending state. If the channel is found to be busy, then add 1 to the variables of NB and BE, and re-determine the size of CW (competition window) according to the value of BE. And judge whether the value of NB is greater than maxCSMABackoffs (maximum numb...

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Abstract

The invention discloses a method for network congestion control of power line carrier communication. Considering the security of important data, an original CSMA / CA protocol applied to power line carrier communication is improved, data is divided into high-priority data and ordinary-priority data, and the important data is set to be at high priority. In order to ensure the security and reliability of the high-priority data, a special high-priority competition channel is opened, so as to ensure the priority in transmission of the high-priority data. The ordinary-priority data can only be transmitted after the transmission of the high-priority data is completed, thereby preventing the important data from being discarded due to competition failure. In addition, in order to ensure data security, an RF / AF handshaking signal is added before transmission of the high-priority data, and a data packet is transmitted after successful transmission and reception of the handshaking signal. An RF frame has a channel reservation function, the transmission of the original ordinary-priority data is interrupted when high-priority data to be transmitted is found, and the high-priority data is transmitted preferentially.

Description

technical field [0001] This design involves the field of smart grid power line communication, mainly to improve the common CSMA / CA (Carrier Sense Multiple Access with Collision Avoidance) mechanism used in the existing power line carrier communication, to realize Control of congestion in power line carrier communication networks. Background technique [0002] With the popularity of smart meters, power supply companies have bid farewell to the way of manually reading electricity, and can obtain electricity in a variety of ways, the most common of which is power line carrier communication. It is the first choice for meter data communication due to its low design and operating costs. Early power line carrier communication has a master node and multiple slave nodes in a network. Only the master node can initiate communication, and the slave node can only enter the communication sending state after receiving access information. Therefore, there is no conflict of power line chan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B3/54H04L12/803H04L12/807H04L12/851H04L47/27
CPCH04B3/54H04L47/125H04L47/2441H04L47/27
Inventor 尹建丰徐海林魏华义季海涛陈健龙
Owner JIANGSU LINYANG ENERGY CO LTD
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