Distributed PON Bonding Engine for Redundancy
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Solution Overview
Problem
In Passive Optical Network (PON) systems, the complexity and single-point-of-failure issues arise when bonding engines are concentrated in a single hardware module, leading to increased latency and reduced redundancy, especially when transceivers for multiple wavelengths are co-located with the bonding engine.
Innovation Solution
Distributing bonding engines across multiple Optical Line Terminals (OLTs) within a network, where each OLT hosts a bonding engine responsible for managing transmission and dynamic bandwidth allocation for its associated wavelengths, eliminating the single-point-of-failure and enabling redundancy by distributing the load across multiple hardware modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If bonding engines are concentrated in a single hardware module, then device complexity is reduced, but reliability deteriorates due to single-point-of-failure
Solution Approach 1:
The bonding engine function is segmented and distributed across multiple OLT hardware modules rather than concentrated in a single module. Each OLT hosts a bonding engine that manages wavelengths for its associated PON, enabling failover capability while distributing system complexity across multiple independent units.
2Device complexity
If transceivers are co-located with bonding engine, then device complexity is reduced, but reliability deteriorates due to single-point-of-failure
Solution Approach 1:
The system segments the bonding engine across multiple OLTs rather than co-locating all transceivers with a single bonding engine. Each OLT maintains local transceivers for its PON while hosting a bonding engine, allowing traffic to be routed through different OLTs depending on wavelength assignment and failover needs.
3Reliability
If bonding engines are distributed to multiple OLTs, then reliability is improved, but device complexity increases
Solution Approach 1:
Each OLT is designed with multi-functionality, capable of hosting a bonding engine, managing multiple PONs, and routing traffic across different wavelengths. This universal design allows the same OLT hardware to serve multiple functions including bonding engine operations, reducing the need for specialized dedicated components.
4Productivity
If multiple wavelengths are used to increase capacity, then productivity is improved, but device complexity increases
Solution Approach 1:
The wavelength management function is segmented and distributed across multiple OLTs, with each OLT responsible for managing wavelengths assigned to its PON. This distribution reduces the complexity burden on any single device while enabling aggregate capacity through multiple wavelengths.
Solution Approach 2:
The system implements dynamic wavelength assignment and bonding engine failover capabilities, allowing flexible reconfiguration of wavelength-to-OLT mappings based on traffic conditions and hardware availability. This dynamic management simplifies the complexity of multi-wavelength operation through adaptive control.
Data Source
AI summary
Methods, systems, and apparatus for hosting an optical line terminal (OLT) bonding engine are disclosed. In one aspect, packet data for transmission over a passive optical (PON) is selected. A transmission wavelength assigned to the packet data is identified. A particular OLT is selected from among the additional OLTs to transmit the packet data over the PON based on the corresponding wavelength of the particular OLT matching the identified transmission wavelength assigned to the packet. The packet data is formatted based on the particular OLT. The formatted packet data is transmitted to the particular OLT for transmission over the communications interface.