Optical Line Terminal With Slice-Aware Bandwidth Allocation
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Solution Overview
Problem
Existing PON systems face inefficiencies in bandwidth allocation due to fixed allocation of maximum bandwidths across optical line termination units, leading to suboptimal utilization when actual requirements vary, especially in virtual PON systems accommodating diverse communication services.
Innovation Solution
An optical line terminal with a slice management unit and bandwidth allocation unit that dynamically adjusts bandwidth allocation based on requested bandwidths, slice configuration information, and available resources, ensuring efficient utilization across multiple optical line termination units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If maximum bandwidth is fixedly allocated to each optical line termination unit, then bandwidth allocation is simple and stable, but bandwidth utilization efficiency deteriorates when actual requirements vary
Solution Approach 1:
The patent implements dynamic bandwidth allocation where the OLT adjusts bandwidth allocations in real-time based on actual traffic demands from ONUs. The system transitions from fixed static allocation to dynamic allocation that adapts to changing network conditions, thereby improving bandwidth utilization efficiency without requiring complex manual configuration
Solution Approach 2:
The system employs feedback mechanisms where ONUs report their bandwidth requirements to the OLT, and the OLT uses this information to adjust allocations in subsequent cycles. This closed-loop control enables the system to automatically adapt to varying traffic patterns while maintaining manageable complexity through automated decision-making algorithms
2Productivity
If bandwidth is dynamically allocated based on real-time demands, then bandwidth utilization efficiency improves, but system complexity and control difficulty increase
Solution Approach 1:
The patent implements a feedback-based dynamic bandwidth allocation mechanism where optical network units (ONUs) report their bandwidth requirements to the optical line terminal (OLT), which then adjusts allocations in real-time. This feedback loop enables automated adaptation to varying traffic demands without requiring complex manual control, thereby improving bandwidth utilization while keeping system management tractable through algorithmic decision-making
Solution Approach 2:
The system enables ONUs to self-report their bandwidth needs and allows the OLT to automatically make allocation decisions based on aggregated requests and network capacity. This self-service approach eliminates the need for manual bandwidth management and reduces control difficulty by delegating measurement and reporting functions to the network elements themselves
3Adaptability or versatility
If fixed bandwidth allocation is used across multiple optical line termination units, then system stability is maintained, but adaptability to varying service requirements deteriorates
Solution Approach 1:
The patent implements dynamic bandwidth allocation that allows the system to adapt to varying service requirements across multiple optical line termination units. The allocation mechanism adjusts bandwidth distribution in real-time based on actual traffic demands, enabling the system to accommodate diverse services (e.g., high-definition video, voice over IP, data services) with different bandwidth requirements while maintaining operational stability through controlled adjustment processes
Solution Approach 2:
The system changes bandwidth allocation parameters dynamically based on service requirements and network conditions. By adjusting allocation parameters such as bandwidth quantities, allocation time slots, and priority levels, the system adapts to different service types and traffic patterns while maintaining overall system stability through structured parameter management and gradual adjustment
Data Source
AI summary
An optical line terminal includes: one or more optical line termination units to which an optical network unit of an optical communication system is connected, the one or more optical line termination units acquiring an allocation requested bandwidth from the optical network unit connected; a slice management unit that manages slice configuration information indicating which slice each of the optical network unit connected to the optical line termination unit is included in, and manages a limitation on allocation of bandwidth for the optical network unit as a parameter for allocating bandwidth; and a bandwidth allocation unit that determines, for each of the slice, an allocated bandwidth for each of the optical network unit connected to the optical line termination unit on the basis of the allocation requested bandwidth, the slice configuration information, and the parameter for allocating bandwidth.