Power Line Communication Channels for Priority Data Isolation
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Solution Overview
Problem
The challenge in power line carrier (PLC) communication is to ensure rapid transmission of information while minimizing transmission loss and interference, particularly when the available spectrum is limited, which affects the communication rate.
Innovation Solution
Implementing multiple physical channels on nodes for carrying information of different priorities, using power lines to isolate and orthogonal or common preambles to reduce interference, and prioritizing high-priority information transmission to enhance reliability and rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a low communication frequency band is used to reduce transmission loss, then signal transmission loss is reduced, but communication rate decreases
Solution Approach 1:
The communication system segments the available frequency spectrum into multiple channels with different frequency ranges. Each channel can be independently selected based on the priority and requirements of the information being transmitted, allowing simultaneous transmission of high-rate data on higher frequency channels and low-loss signals on lower frequency channels.
Solution Approach 2:
The system dynamically changes the carrier frequency parameter based on the type and priority of information being transmitted. For high-priority control information, lower frequencies are selected to minimize loss, while for standard data transmission, higher frequencies are used to maximize communication rate.
2Productivity
If multiple channels are used to transmit different priority information simultaneously, then transmission rate is increased, but channel interference increases
Solution Approach 1:
The system uses preambles as intermediary signals that mediate between multiple simultaneous channels. These preambles enable receivers to distinguish and separate signals from different channels, reducing mutual interference while allowing multiple channels to operate simultaneously at high transmission rates.
Solution Approach 2:
The system introduces the dimension of signal structure (preamble sequences) to differentiate channels. By assigning unique preambles to different channels, the system enables receivers to identify and process signals from multiple channels simultaneously without confusion, effectively managing channel separation in the signal domain.
3Reliability
If high-priority information is transmitted with priority over low-priority information, then reliability of high-priority transmission is improved, but transmission of low-priority information is delayed
Solution Approach 1:
The system segments information into different priority levels and assigns them to different channels or time slots within the communication protocol. High-priority control information is transmitted on dedicated channels or with higher transmission precedence, ensuring reliable and timely delivery, while low-priority data can utilize remaining capacity without blocking critical communications.
Data Source
AI summary
A communication method and apparatus. The method is applied to a first node, a plurality of channels are disposed on the first node, different channels in the plurality of channels respectively carry information of different priorities, and the channel is a physical channel established by using a power line. The method includes: the first node generates a first packet including first information, and sends the first packet to a second node through a first channel, where the first channel is a channel that carries information of a first priority in the plurality of channels, the first priority is a priority of the first information, and the second node establishes a connection to the first node through a power line. Accordingly, information of different priorities may be sent through different channels.