5G Over Coax Node for Symmetric High-Rate HFC Links
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Solution Overview
Problem
Existing hybrid fiber coax (HFC) networks face limitations in data rates and bandwidth due to the use of coaxial cable amplifiers, which introduce asymmetry and hard-wired bandwidth allocation, making it costly and difficult to upgrade to higher data rates and symmetric operation, especially in multi-dwelling units (MDUs).
Innovation Solution
A node apparatus with a Distributed Unit (DU) and Radio Unit (RU) that processes spatial streams and combines them for transmission over coaxial cables, utilizing expanded frequency bands and 802.11ax technology to enable symmetric and flexible bandwidth allocation, reducing the need for extensive infrastructure upgrades.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If traditional HFC network with coaxial cable amplifiers is used, then existing infrastructure can be utilized, but data rates and bandwidth are limited and asymmetric
Solution Approach 1:
The patent implements dynamic bandwidth allocation where the available bandwidth can be flexibly adjusted based on demand. The system transitions from hard-wired asymmetric allocation to dynamic symmetric allocation, allowing the network to adapt bandwidth distribution in real-time according to user needs and service requirements.
Solution Approach 2:
The patent changes the operational parameters of the coaxial cable infrastructure by utilizing expanded frequency bands (e.g., 1.6 GHz to 4 GHz) instead of traditional bands. This parameter change enables higher data rates while maintaining the existing cable infrastructure, avoiding the need for complete system replacement.
2Ease of manufacture
If coaxial cable infrastructure is used for high data rates, then capital expenditure can be reduced, but symmetric operation and flexible bandwidth allocation are difficult to achieve
Solution Approach 1:
The system implements dynamic bandwidth allocation where the available bandwidth can be flexibly adjusted based on demand. The system transitions from hard-wired asymmetric allocation to dynamic symmetric allocation, allowing the network to adapt bandwidth distribution in real-time according to user needs and service requirements.
Solution Approach 2:
The patent makes the existing coaxial cable infrastructure universal by enabling it to support multiple services and functions simultaneously - including high-speed data communication, symmetric bidirectional transmission, and various types of content delivery. This multi-functionality is achieved through expanded frequency band utilization and advanced modulation techniques.
3Area of stationary object
If amplifier stages are added to extend network reach, then coverage area increases, but data rates and bandwidth are further limited
Solution Approach 1:
The patent changes the operational parameters of the coaxial cable infrastructure by utilizing expanded frequency bands (e.g., 1.6 GHz to 4 GHz) instead of traditional bands. This parameter change enables higher data rates while maintaining the existing cable infrastructure, avoiding the need for complete system replacement.
Data Source
AI summary
A node apparatus and methods involving the same. The node including a Distributed Unit (DU); and a Radio Unit (RU) in communication with the DU, wherein the RU comprises: a first port for interfacing with a signal transmitted from the DU, wherein the signal transmitted from the DU comprises at least an 8 layer spatial stream; a Digital Front End (DFE) configured to process the spatial stream by combining a first four streams of the spatial stream in a first Digital to Analog (DAC) converter to form a first signal, and by combining a second four streams of the spatial stream in a second DAC, to form a second signal; and a second port in communication with a coaxial cable, wherein the coaxial cable is configured to transmit a combined signal.