Optical Line Terminal Dynamic Bandwidth Allocation
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Solution Overview
Problem
Existing bandwidth allocation methods in Passive Optical Networks (PONs) face inefficiencies due to the inability to effectively balance bandwidth efficiency and latency, often resulting in over- or under-allocation of bandwidth.
Innovation Solution
An optical line terminal (OLT) is equipped with a processor and memory configured to determine the relationship between bandwidth efficiency and latency for communication between an optical network unit (ONU) and the OLT, and to schedule bursts based on this relationship.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If bandwidth allocation is increased to reduce latency, then latency is improved, but bandwidth efficiency deteriorates
Solution Approach 1:
The patent implements dynamic bandwidth allocation where the OLT continuously monitors queue buffer status and adjusts burst parameters in real-time. The system transitions from static to dynamic allocation, allowing bandwidth to be flexibly adjusted based on actual traffic conditions, thereby optimizing the trade-off between latency and bandwidth efficiency without continuous over-allocation
Solution Approach 2:
The system employs feedback mechanisms where the OLT receives buffer status reports from ONUs and uses this information to adjust subsequent bandwidth allocations. The relationship determination between bandwidth efficiency and latency creates a feedback loop that enables the system to learn from past allocations and optimize future allocations, resolving the contradiction by adapting to actual network conditions
2Loss of energy
If bandwidth allocation is decreased to improve bandwidth efficiency, then bandwidth efficiency is improved, but latency worsens
Solution Approach 1:
The patent changes the parameters of bandwidth allocation by determining optimal burst schedules based on the relationship between bandwidth efficiency and latency. Instead of using fixed allocation parameters, the system dynamically adjusts burst timing, duration, and size parameters to achieve optimal performance, improving bandwidth efficiency while maintaining acceptable latency through precise parameter optimization
Solution Approach 2:
The system applies partial action by allocating bandwidth only when and where needed based on actual queue buffer status. Rather than continuously allocating maximum bandwidth, the system provides just enough bandwidth to maintain performance, reducing waste and improving overall bandwidth efficiency while preventing latency issues through targeted allocation
3Device complexity
If static bandwidth allocation is used, then device complexity is reduced, but network performance deteriorates
Solution Approach 1:
The patent transitions from static to dynamic bandwidth allocation, where the OLT continuously monitors traffic conditions and adjusts burst schedules in real-time. This dynamic approach significantly improves network performance by adapting to changing traffic patterns, while the automation of this process prevents excessive complexity from manual intervention
4Productivity
If dynamic bandwidth allocation is implemented, then network performance is improved, but device complexity increases
Solution Approach 1:
The system implements self-service through automated bandwidth allocation where the OLT autonomously monitors queue buffer status, determines the bandwidth efficiency-latency relationship, and adjusts burst schedules without external intervention. This automation improves network performance while managing complexity by embedding the decision-making logic within the network equipment itself, eliminating the need for complex external control systems
Data Source
AI summary
An optical line terminal is disclosed. The optical line terminal comprises at least one processor; and at least one memory including machine-readable instructions. The at least one memory and the machine-readable instructions are configured to, with the at least one processor, cause the optical line terminal to determine based on one or more variables a relationship between bandwidth efficiency and latency for communication of contents of a queue buffer of an optical network unit with the optical line terminal via an optical distribution network, and determine a burst schedule for the queue buffer based on the determined relationship.