Channel Selection for DOCSIS-MoCA Shared Spectrum Interference
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Solution Overview
Problem
Coexistence of DOCSIS® and MoCA® communications channels in a shared spectrum leads to interferences and bit errors due to overlapping frequency ranges, necessitating a solution for optimized bandwidth allocation and interference-free transmission.
Innovation Solution
An automated communication channel selector (ACCS) system that determines an optimized channel configuration by performing network discovery, spectrum analysis, and applying business rules to allocate channels without interference, using a gateway device with a reconfigurable filter to manage DOCSIS® and MoCA® networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If DOCSIS® and MoCA® channels transmit concurrently in overlapping frequency ranges, then bandwidth utilization increases, but interference and bit errors occur
Solution Approach 1:
The system dynamically adjusts filter configurations based on real-time spectrum analysis and network conditions. The gateway device can reconfigure filters between all-pass, low-pass, and band-pass modes to optimize bandwidth utilization while preventing interference between DOCSIS® and MoCA® channels during concurrent transmission.
Solution Approach 2:
The system changes operational parameters by analyzing spectrum usage and automatically selecting optimal channel configurations. It modifies filter cutoff frequencies and channel allocations to separate overlapping DOCSIS® and MoCA® transmissions, thereby maintaining high bandwidth utilization while eliminating interference and bit errors.
2Reliability
If automated channel selection is implemented, then interference is prevented, but system complexity increases
Solution Approach 1:
The gateway device performs self-configuration through automated spectrum analysis and channel selection. The system autonomously discovers network topology, analyzes frequency spectrum usage, and determines optimal channel allocations without manual intervention, thereby preventing interference while minimizing the need for complex external configuration systems.
Solution Approach 2:
The system performs preliminary spectrum analysis and network discovery before establishing concurrent DOCSIS® and MoCA® transmissions. By pre-configuring filters and channel allocations based on initial spectrum measurements, the system prevents interference from occurring in the first place, rather than requiring complex real-time intervention mechanisms.
Data Source
AI summary
Automated communication channel selection is provided. A method, system, and computer readable storage device automatically perform a discovery process of a MoCA® network, to determine a topology of the network, perform a spectrum analysis of a DOCSIS® network of which a portion of the frequency range may be shared, apply one or more business rules to the collected network and spectrum usage data, and determine an optimized channel configuration for transmitting data to end devices in a local network. For example, the channel configuration may be configured for optimal bandwidth allocation, transmission speeds, signal quality, etc., without interferences within the shared frequency spectrum range. A gateway device may include a filter that can be reconfigured as an all-pass filter or as a variable low-pass filter based on the channel configuration determination. The MoCA® network may be reconfigured to operate within a defined frequency range based on the determined channel configuration.