PON Subscriber Device Hardware Signal Processing During CPU Restart
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In Fiber To The Home (FTTH) networks using Passive Optical Networks (PON), software updates often require CPU restarts, disrupting the continuity of main signal frames and operations, administration, and maintenance functions, leading to potential service interruptions.
Innovation Solution
A transmission control system and devices with a subscriber-side and office-side communication system that include processing units capable of continuous signal processing and transmission control information management, allowing for uninterrupted data transmission and OAM information monitoring during CPU restarts by using hardware-based processing for critical functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If software update is performed requiring CPU restart, then functional updates are achieved, but main signal continuity is interrupted
Solution Approach 1:
The patent segments the signal processing functions into two parts: OAM (Operations, Administration, and Maintenance) functions handled by software that can be restarted, and main signal processing functions handled by hardware that continues operating. This segmentation allows the OAM channel to be temporarily stopped during CPU restart without affecting the continuity of main signal frames, thereby resolving the contradiction between software update capability and main signal continuity.
2Adaptability or versatility
If CPU restart is performed for software update, then functional updates are achieved, but OAM information monitoring is disrupted
Solution Approach 1:
The patent separates OAM information processing from main signal processing, allowing the OAM channel to be selectively stopped during CPU restart while maintaining main signal continuity. The hardware-based main signal processing ensures that even when OAM monitoring is temporarily suspended for software updates, the critical main signal frames continue without interruption.
3Reliability
If hardware-based processing is used for critical functions, then service continuity is maintained during CPU restart, but device complexity increases
Solution Approach 1:
The patent introduces a hardware-based processing unit as an intermediary that handles critical main signal processing functions independently from the software-based CPU. This hardware intermediary ensures service continuity during CPU restart while the OAM channel is temporarily stopped, resolving the contradiction between service continuity and device complexity by using hardware acceleration for specific critical functions.
Data Source
AI summary
Provided is a subscriber-side communication device including a subscriber-side processing unit that continuously performs signal processing regardless of computer restart and includes a transmission processing unit that performs a data transmission process according to transmission control information contained in a received signal from the office-side communication device. Also provided is an office-side communication device including an office-side processing unit that continuously performs signal processing regardless of computer restart, and a transmission control information computing unit that computes transmission control information for each subscriber-side communication device, the office-side processing unit including a transmission control information storing unit that stores transmission control information of each subscriber-side communication device computed by the transmission control information computing unit, and a transmission control processing unit that performs a transmission control process with each subscriber-side communication device by using the transmission control information of each subscriber-side communication device stored in the transmission control information storing unit.