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Method for solving problem of PLC channel resource contention of multi-node transmission

A channel resource and multi-node technology, applied in the field of multi-node transmission contention for PLC channel resources, can solve problems such as transmission quality control not considered, improve system throughput and delay, improve system performance, and better ability Effect

Inactive Publication Date: 2017-09-22
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of this invention is that it considers the time-sharing transmission and improves the transmission capacity of the system, but it does not consider the transmission quality control in specific cases

Method used

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  • Method for solving problem of PLC channel resource contention of multi-node transmission
  • Method for solving problem of PLC channel resource contention of multi-node transmission
  • Method for solving problem of PLC channel resource contention of multi-node transmission

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Embodiment Construction

[0031] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0032] The purpose of the present invention is to study a method for solving the contention of PLC channel resources by multi-node transmission, and improve the probability of successful transmission by multiplexing in time domain and frequency domain. Based on the MAC layer theory, a conflict resolution algorithm is designed. Through probability analysis, the optimal transmission vector of each channel is calculated. The filtering protocol is used to select the competition time slot. Finally, the throughput is calculated and the performance index of the method is analyzed.

[0033] It is found through research that using multiple frequency channels can potentially prevent interference through periodic switching between channels and improve the robustness of the system to noise interference. During a time slot, nodes will sense busy channels and fo...

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Abstract

The invention discloses a method for solving the problem of PLC channel resource contention of multi-node transmission. The method for solving the problem of PLC channel resource contention of multi-node transmission improves transmission success probability through a time domain and frequency domain multiplexing mode. The method is characterized by, based on an MAC layer theory, designing a collision resolution algorithm; through probability analysis, calculating an optimal transmission vector of each channel; selecting a contention slot through protocol filtering; and finally, calculating throughput and analyzing performance index of the method. Through a plurality of frequency channels, interference can be prevented potentially through inter-channel periodic switching, thereby improving robustness of the system for noise interference; and in one time slot, nodes sense busy channels, and are forced off from contention, and the nodes sending carrier waves in the same channel are moved to the next time slot. The method is to reduce channel contention possibility through distributed channel selection and conflict resolution.

Description

technical field [0001] The invention relates to the technical field of channel transmission, in particular to a method for solving the contention of multi-node transmission for PLC channel resources. Background technique [0002] Power line communication PLC is a very promising communication mode for power distribution communication network, which can reduce the complexity of network construction. Since power line communication is a communication method that uses power lines to transmit data, the construction cost in the distribution network is extremely low. With the extensive development of power distribution communication network, the management and control of communication becomes more complicated. At the same time, with the increase in the amount of multi-point transmission data, the power grid has stricter requirements on communication reliability and transmission quality. However, the transmission distance of power line communication is limited, the throughput is gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/08H04B3/54
CPCH04W74/0841H04B3/54H04W74/0816
Inventor 王攀
Owner NANJING UNIV OF POSTS & TELECOMM
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