Dynamic Bandwidth Allocation for PON Upstream Collision

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Solution Overview

Problem

In passive optical networks (PONs), the existing resource targeted scheduling methods face challenges in efficiently managing upstream bandwidth allocation across ONTs, leading to potential collisions and unequal transmission delays.

Innovation Solution

The implementation of a dynamic bandwidth allocation (DBA) system using OMCI messages and a thread dispatching system that manages OMCI messaging through a multi-threaded execution module, ensuring timely and efficient allocation of upstream bandwidth to ONTs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If dynamic bandwidth allocation is implemented to manage upstream bandwidth, then bandwidth collision is reduced, but system complexity increases

Engineering Contradiction:

Improvebandwidth collision reductionVSAvoidscheduling system complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent segments the bandwidth allocation process into discrete time slots and uses individual scheduling entries for each ONT, allowing the OLT to manage multiple subscribers independently through structured time division rather than complex continuous coordination

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system performs preliminary bandwidth allocation by pre-calculating and assigning time slots before actual data transmission occurs, ensuring that bandwidth is reserved and allocated in advance to prevent collisions during the transmission phase

Inventive Principle:

Principle #10Preliminary action

2Productivity

If upstream bandwidth is allocated to multiple ONTs simultaneously, then network throughput increases, but transmission delay becomes unequal

Engineering Contradiction:

Improvenetwork throughputVSAvoidtransmission delay equality

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The patent implements periodic time slots for each ONT in a cyclic manner, where each subscriber is allocated a specific periodic interval for upstream transmission, ensuring that all ONTs receive equal treatment over time while maintaining high throughput through continuous cycling

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The scheduling system dynamically adjusts time slot assignments based on current network conditions and subscriber requirements, allowing flexible allocation that adapts to changing traffic patterns while maintaining fairness through programmable control of the time slot distribution

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS12328539B2Resource targeted scheduling for a PON network

Publication Date: 2025.06.10 ARRIS ENTERPRISES LLC

AI summary

A system for resource targeted scheduling for a PON network.