Cable TV Broadband Access System with Distributed Deployment
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Solution Overview
Problem
Existing broadband access technologies for cable TV networks, such as CMTS and EoC, face challenges in cost efficiency, noise management, interoperability, bandwidth, QoS assurance, and manageability, particularly in large-scale deployments and complex network environments.
Innovation Solution
A cable TV network broadband access system with a three-stage distributed deployment and centralized control architecture, comprising system terminal ends, access ends, and head ends, that enables end-to-end control management, data format transformation, and QoS priority assurance, along with low comprehensive costs and high management efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If CMTS devices are deployed for large user units (thousands of users), then broadband data transmission capability is improved, but device cost and average bandwidth cost per user become excessively high for smaller user units (tens or hundreds of users)
Solution Approach 1:
The system segments the network into multiple access ends, each serving a specific user unit (tens or hundreds of users), rather than using a single centralized CMTS for all users. This segmentation allows cost-effective deployment for smaller user units while maintaining broadband capability.
Solution Approach 2:
The invention transitions from a two-stage architecture (head end and terminal end) to a three-stage architecture by introducing access ends as an intermediate layer. This dimensional change enables distributed deployment where access ends are placed closer to user units, reducing the need for expensive centralized CMTS devices.
2Ease of operation
If CMTS devices are located in center computer rooms or sub-center computer rooms, then network management is simplified, but mass noise is generated that obstructs high quality service provision
Solution Approach 1:
The invention extracts the data transmission function from the centralized head end and places it at distributed access ends located near user units. This separation removes the noise-generating equipment from the center computer room while maintaining centralized management capabilities through the head end.
Solution Approach 2:
The access end acts as an intermediary between the head end and terminal ends. It handles local data transmission and processing, reducing the need for noisy equipment in centralized locations while maintaining network management through the head end.
3Adaptability or versatility
If multiple EoC standards (HomePlugAV, HomePlugBPL, HomePNA, MoCA, WIFI frequency reduction) are used in the radio and TV network, then technology diversity and specific application advantages are achieved, but interoperability, upgrade, and maintenance become difficult
Solution Approach 1:
The access end is designed with multi-functional capability to support multiple EoC standards and protocols. This universal design allows the same access end infrastructure to handle different standards (HomePlugAV, HomePlugBPL, HomePNA, MoCA, WIFI frequency reduction) without requiring separate specialized equipment for each standard, thereby ensuring interoperability while maintaining technology diversity.
4Productivity
If EoC technology is deployed, then broadband access is achieved, but bandwidth capacity, QoS assurance, manageability, and supported number of users are insufficient
Solution Approach 1:
The system segments the network into head end, access ends, and terminal ends, with each access end serving a specific user unit. This segmentation allows for better resource allocation and QoS management at each access end level, improving overall bandwidth capacity and user support compared to centralized EoC deployment.
Solution Approach 2:
Each access end is configured with local QoS assurance capabilities tailored to its specific user unit requirements. This local quality approach allows differentiated service quality and bandwidth allocation at each access end, improving overall QoS assurance and manageability compared to uniform EoC technology deployment.
Data Source
AI summary
The present invention provides a cable TV broadband access system with distributed deployment and centralized control, which comprises: a system terminal end, configured to receive and transmit uplink and downlink service data, and receive and respond to access control data and management control data; a system access end, configured to implement data format transformation and data forwarding or processing for said uplink and downlink service data, said access control data and said management control data of said system terminal end, and transmit, receive and respond to management control data of said system access end; a system head end, configured to implement management control and access control for said system access end and said system terminal end, and process, converge and forward said uplink and downlink service data. Said system uses a system architecture with three-stage distributed deployment and centralized control comprising a system terminal end, a system access end and a system head end, and it can not only realize the end-to-end control management and QoS priority assurance of the broadband data service, but can also realize easy network deployment, low comprehensive cost and high management efficiency.