Optical Transmission Device Bit Rate Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current optical network systems face challenges in rapidly changing the bit rate of LO ODUflex (GFP) signals without disrupting data transmission, as existing methods require significant time to adjust the bit rate and number of time slots, which is not sufficient for real-time quality of service (QoS) control.
Innovation Solution
An optical transmission device that dynamically adjusts the bit rate of LO ODUflex signals by adding a time slot with a dummy signal, ensuring data writing and reading speeds and delay times match existing slots, allowing for seamless integration and rapid bit rate changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the bit rate of LO ODUflex signals is adjusted using conventional methods, then the data transmission can be maintained, but the adjustment time is too long (approximately 2 seconds) for real-time QoS control
Solution Approach 1:
The patent segments the time slot structure by introducing a dummy time slot separate from the actual data-carrying time slots. This segmentation allows the bit rate adjustment to be performed by simply changing the number of active time slots without affecting the overall frame structure, enabling rapid adjustment from 2 seconds to 100 microseconds.
Solution Approach 2:
The dummy time slot acts as an intermediary element that facilitates bit rate adjustment. By inserting or removing dummy time slots, the system can dynamically change the number of effective time slots for data transmission, achieving fast bit rate changes while maintaining data integrity and synchronizing with the reference signal.
2Adaptability or versatility
If the number of time slots is changed to adjust bit rate, then the bit rate can be modified, but the data writing and reading speeds and delay times may not match between new and existing slots
Solution Approach 1:
The patent changes the parameter of time slot configuration by dynamically adding or removing dummy time slots based on the required bit rate. This parameter change allows the system to adapt to different bit rate requirements while maintaining consistent data writing and reading speeds across all active time slots through proper synchronization with the reference signal.
Data Source
AI summary
An optical transmission device, which transmits a first frame containing second frames, includes newly adding and allocating, when a bit rate of a specific second frame among the second frames is to be changed, a time slot corresponding to an increase in the bit rate of the specific second frame to time slots previously set for the second frames in time slots of the first frame; and inputting a dummy signal as data to the newly-added time slot while performing such a setting that both of: a data writing speed and a data reading speed; and a delay time between writing and reading of the data for the newly-added time slot are in agreement with both of: a data writing speed and a data reading speed; and a delay time between writing and reading of the data for each time slot of the previously-set time slots.