PON Interface Redundancy via Centralized Control Memory
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Solution Overview
Problem
In point-to-multipoint optical communication systems with multiple active PON interfaces, existing technologies face challenges in efficiently switching to a standby interface without disrupting service when one interface fails, due to differences in control information across interfaces.
Innovation Solution
An optical communication system with a memory to store control information for all interfaces, a standby interface functionally equivalent to active interfaces, and a switching apparatus that seamlessly transfers data paths and control information upon fault detection, allowing the standby interface to replace a faulty active interface with minimal service interruption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate standby PON interface is provided for each active PON interface, then reliability is improved, but device complexity and cost increase significantly
Solution Approach 1:
The standby PON interface card is designed to be universal and can replace any of the multiple active PON interface cards. It stores control information for all active interfaces and can assume the function of whichever interface fails, eliminating the need for dedicated standby cards for each active interface.
Solution Approach 2:
Multiple standby capabilities are merged into a single standby PON interface card. Instead of having separate standby cards for each active interface, the invention combines all standby functions into one card that can serve any failed active interface through control information switching.
2Stability of the object's composition
If control information is stored separately in each PON interface, then interface independence is maintained, but switching capability to standby interface is compromised
Solution Approach 1:
A control information storage area is introduced as an intermediary between the PON interface cards and the control system. This storage area maintains control information for all interfaces and enables the standby card to acquire necessary control data when replacing an active interface, bridging the gap between interface independence and switching capability.
3Productivity
If multiple active PON interfaces are used to connect more ONUs, then system capacity increases, but the risk of interface failure and service interruption increases
Solution Approach 1:
The standby PON interface card is prepared in advance with the capability to store and access control information for all active interfaces. This preliminary preparation ensures that when any active interface fails, the standby card can immediately take over without service interruption, even as the number of active interfaces increases.
Data Source
AI summary
An optical communication system has two or more active interfaces, each controlling the transmission and reception of optical signals between a communication network and one or more subscriber terminals according to control information pertaining to the individual subscriber terminals. The control information used by all the active interfaces is stored in a memory. The optical communication system also has a standby interface that is functionally equivalent to the active interfaces, and an optical switching apparatus that switches data transmission paths among the network, the active and standby interfaces, and the subscriber terminals. If a fault is detected in an active interface, the standby interface extracts the control information of the faulty interface from the memory, and the optical switching apparatus switches the data transmission paths so that the standby interface replaces the faulty interface.