Optical Transmission Bandwidth Allocation for TDM-PON Delay Reduction
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Solution Overview
Problem
In mobile networks, dynamic bandwidth allocation in TDM-PON systems leads to decreased bandwidth utilization efficiency and throughput due to transmission delays, especially when ground stations and higher-level devices are connected, causing inefficiencies in optical network usage.
Innovation Solution
An optical transmission system that includes ground stations, optical-terminating devices, a traffic-monitoring unit, and a bandwidth allocation calculation unit, which estimates and dynamically allocates bandwidth based on traffic amounts and the arrangement of ground stations to avoid delays and maintain efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dynamic bandwidth allocation is implemented in TDM-PON systems, then bandwidth utilization efficiency improves, but transmission delays increase and throughput decreases
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing optimal bandwidth allocation amounts for different traffic conditions before actual transmission occurs. The OLT maintains a bandwidth allocation management table that pre-determines allocation amounts based on predicted traffic patterns, allowing the system to allocate bandwidth without real-time calculation delays, thus improving both efficiency and reducing transmission delays
Solution Approach 2:
The patent implements dynamics by making the bandwidth allocation amount adjustable based on traffic conditions. The system dynamically selects allocation amounts from pre-calculated values based on current traffic demand, creating a flexible allocation mechanism that adapts to changing conditions without requiring complex real-time calculations, thereby maintaining both high utilization efficiency and low transmission delay
2Loss of time
If static bandwidth is allocated to each ground station, then transmission delays are minimized, but bandwidth utilization efficiency decreases
Solution Approach 1:
The patent applies parameter changes by varying the bandwidth allocation amount based on traffic conditions rather than using a fixed static value. The OLT changes the allocation parameter dynamically selected from pre-calculated options, allowing the system to maintain low transmission delays while improving bandwidth utilization efficiency by allocating appropriate bandwidth according to actual traffic demand
3Quantity of substance
If multiple ground stations share an optical network, then construction costs are reduced, but bandwidth allocation complexity increases
Solution Approach 1:
The patent reduces bandwidth allocation complexity through preliminary action by pre-calculating optimal allocation amounts for various traffic scenarios and storing them in a management table. This pre-computation approach simplifies the real-time allocation process, allowing the OLT to quickly select appropriate allocation amounts without complex calculations, thereby enabling multiple ground stations to share the optical network efficiently
Solution Approach 2:
The patent uses copying by creating a bandwidth allocation management table that stores pre-calculated allocation patterns. This table serves as a template or copy of optimal allocation solutions that can be quickly referenced and applied to different ground stations and traffic conditions, simplifying the allocation process while managing complexity across multiple shared stations
Data Source
AI summary
An optical transmission system includes ground stations; optical-terminating devices; a traffic-monitoring unit that detects a traffic amount of the uplink signal transmitted in a time-division multiplexing manner for each of the optical-terminating devices; and a bandwidth allocation calculation unit that estimates one optical-terminating device of the optical-terminating devices connected to one ground station of the ground stations having a cell where the moving object is positioned on the basis of the traffic amount, and calculates a first allocation amount of a bandwidth allocated to the uplink signal of the one optical-terminating device connected to the one ground station having the cell where the moving object is positioned and a second allocation amount of a bandwidth allocated to the uplink signal of another optical-terminating device of the optical-terminating devices connected to another ground station of the ground stations having a cell adjacent to the cell where the moving object is positioned.