Demarcation Point Unit for Coaxial Home Network Signal Separation
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Solution Overview
Problem
Existing communication network standards require rewiring of homes to accommodate evolving protocols, which is not feasible with existing coaxial cable infrastructure, and they do not efficiently utilize the installed base of coaxial cables, leading to lower bit rates compared to other media like power lines or wireless links.
Innovation Solution
A demarcation point unit connected between a home network backbone and an external network, utilizing a blocking filter or diplexer with a signal reflector, allows for the separation and reflection of home network signals without the need for rewiring, using existing coaxial cables to maintain interconnectivity and support higher bit rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If evolving communication network standards are implemented, then interconnectivity among electronic devices is improved, but rewiring of homes is required which increases device complexity and installation difficulty
Solution Approach 1:
A demarcation point unit is introduced as an intermediary device between the home network backbone and external networks. This unit includes a blocking filter that separates home network signals from external signals, and a splitter that distributes combined signals to multiple outlets. The intermediary device enables protocol compatibility without requiring physical rewiring of the home's coaxial cable infrastructure.
2Ease of manufacture
If existing coaxial cable infrastructure is utilized, then installation complexity is reduced, but bit rate is limited compared to other media like power lines or wireless links
Solution Approach 1:
The demarcation point unit is designed to handle multiple signal types and protocols simultaneously. It processes both traditional cable TV signals and modern high-speed data signals through the same coaxial cable infrastructure. The blocking filter and splitter enable the system to support multiple functions including legacy cable service, broadband internet, and interdevice communication without requiring separate wiring systems.
3Productivity
If home network signals and external signals are combined on the same coaxial cable, then signal interference occurs, but separating signals requires additional filtering components
Solution Approach 1:
The demarcation point unit segments the signal processing function into distinct components: a blocking filter that separates home network signals from external signals based on frequency, and a splitter that distributes the combined signals to multiple outlets. This segmentation allows simultaneous transmission of different signal types on the same coaxial cable infrastructure without interference, while keeping each component's function simple and well-defined.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables interconnectivity among electronic devices in a home network without rewiring, using existing coaxial cables to maintain legacy cable TV signals and provide broadband access, while supporting higher bit rates and coexistence with cable TV services.
Implementation Method 1
The blocking filter separates the home network signal from the external signal
Implementation Method 2
The signal reflector unit receives the home network signal from the diplexer and returns the home network signal back to the home network backbone
Implementation Method 3
The diplexer receives a home network signal from the home network backbone and an external signal from the external network. The diplexer separates the home network signal from the external signal.
Implementation Method 4
the signal reflector unit includes a RF converter that changes a frequency of the home network signal before the home network signal returns to the home network backbone
Data Source
AI summary
A demarcation point unit connected between a home network backbone and an external network. The demarcation point unit includes a blocking filter and splitter. The blocking filter receives a home network signal from the home network backbone and an external signal from the external network. The blocking filter separates the home network signal from the external signal, and returns the home network signal back to the home network backbone. The splitter has an input and at least two outputs. The input of the splitter receives the home network signal from the blocking filter.