PON Bandwidth Steering Using Temporal Usage Prediction
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Solution Overview
Problem
Existing passive optical networks (PONs) face inefficiencies in bandwidth allocation, leading to wasted bandwidth due to static allocation techniques that do not adapt to varying subscriber needs, resulting in oversubscription and inefficient use of available resources.
Innovation Solution
Implementing dynamic bandwidth allocation (DBA) and wavelength multiplexing, utilizing tunable filters and transmitters in ONTs and OLTs, managed by a monitoring system that predicts and adjusts bandwidth allocation based on temporal usage patterns and service level agreements to optimize bandwidth distribution among subscribers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If static bandwidth allocation is used, then device complexity is reduced, but bandwidth utilization efficiency deteriorates due to wasted unused bandwidth
Solution Approach 1:
The patent implements dynamic bandwidth allocation where the OLT monitors bandwidth usage patterns of multiple ONTs and adjusts bandwidth allocation in real-time based on actual demand. The system transitions from static to dynamic allocation by implementing a monitoring mechanism that tracks usage over time and reallocates bandwidth dynamically, ensuring that bandwidth is assigned to ONTs that need it while preventing waste from unused allocated bandwidth.
2Loss of energy
If dynamic bandwidth allocation is implemented, then bandwidth utilization efficiency is improved, but device complexity increases due to monitoring and adjustment mechanisms
Solution Approach 1:
The system performs preliminary monitoring of bandwidth usage patterns over time before making allocation decisions. The OLT collects usage data from multiple ONTs during a monitoring period, analyzes the patterns, and then proactively adjusts bandwidth allocation based on predicted needs. This preliminary action phase separates data collection from decision-making, organizing the complexity into manageable stages rather than requiring simultaneous complex processing.
Solution Approach 2:
The patent implements a feedback mechanism where the OLT continuously monitors bandwidth usage by ONTs and uses this information to adjust future allocations. The system measures actual bandwidth consumption, compares it with allocated bandwidth, and feeds this information back into the allocation algorithm to optimize future assignments. This closed-loop feedback system improves efficiency while keeping the control mechanism manageable through iterative adjustment.
3Reliability
If bandwidth is allocated based on peak demand, then reliability is improved for high-usage periods, but loss of substance increases due to wasted bandwidth during low-usage periods
Solution Approach 1:
The patent changes the allocation parameter from fixed peak-demand bandwidth to dynamic bandwidth based on temporal usage patterns. Instead of allocating bandwidth based on maximum possible demand, the system monitors actual usage over time and adjusts allocation parameters dynamically. This allows the system to provide reliable bandwidth during high-usage periods while reducing allocation during low-usage periods, eliminating waste while maintaining service reliability when needed.
Data Source
AI summary
A system that steers the bandwidth allocation for ONTs based upon temporal usage of bandwidth.