Dynamic Spectrum Allocation for Cable Network Capacity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Cable networks experience issues such as congestion, speed losses, and service interruptions due to limitations in upstream and downstream capacity, leading to a degraded user experience.
Innovation Solution
The implementation of dynamic spectrum management in FDX-enabled cable networks, allowing for the conversion of a full-duplex spectrum to either an upstream or downstream mode of communication, thereby increasing capacity by disabling sounding and resource block allocation, and enabling half-duplex operation in specific frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full-duplex spectrum allocation is used to enable simultaneous upstream and downstream communication, then communication efficiency is improved, but spectrum flexibility and capacity adaptability deteriorate
Solution Approach 1:
The patent implements dynamic spectrum allocation that allows frequency bands to switch between full-duplex and half-duplex modes based on real-time network conditions. The CMTS can dynamically convert between communication modes and allocate spectrum resources flexibly, transforming the static spectrum allocation into a dynamic system that adapts to varying traffic demands.
2Reliability
If traditional spectrum management is used to maintain stable communication, then communication reliability is improved, but network capacity and throughput deteriorate
Solution Approach 1:
The patent changes the operational parameters of spectrum bands by enabling conversion between full-duplex and half-duplex modes. This parameter change allows the system to optimize for either reliability or capacity depending on network conditions, breaking the fixed trade-off between communication stability and network throughput.
Solution Approach 2:
The patent makes spectrum bands multi-functional by enabling them to serve different communication modes (full-duplex and half-duplex) based on demand. The same frequency bands can be universally used for various communication scenarios, increasing overall network capacity while maintaining reliable communication through adaptive mode selection.
3Adaptability or versatility
If full-duplex mode is maintained to support bidirectional communication, then communication versatility is improved, but spectrum resource utilization deteriorate
Solution Approach 1:
The patent implements periodic switching between full-duplex and half-duplex modes based on traffic patterns and network conditions. By alternating between communication modes periodically or dynamically, the system maximizes spectrum resource utilization while maintaining the ability to support bidirectional communication when needed.
Data Source
AI summary
Embodiments of the disclosure are generally directed to disabling sounding, resource-block allocation, and various full-duplex (FDX) capabilities in a portion of a spectrum used in FDX-enabled cable networks. The disclosure further describes dynamically using an upstream mode or a downstream mode of communication for half-duplex communication in the portion of the spectrum originally designated for FDX communication, for a given time interval. In another embodiment, the disclosure can thereby facilitate an increase in upstream or downstream capacity on the cable network, for example, a fifteen-fold increase in the upstream capacity or downstream capacity. In some embodiments, control messages can be transmitted from a controller node to devices on the network periodically, describing the usage of the FDX portion of the spectrum for upstream or downstream transmission. The control messages can include medium access control (MAC) management messages and/or tag-length-value (TLV) messages.