PON Aggregation Node Using Cascaded OLT and ONU Layers

The patent segments the aggregation network into multiple PON layers (first PON layer with OLT1/ONU1, second PON layer with OLT2/ONU2), allowing each layer to operate with connection-oriented PON protocols that provide both flexibility and QoS guarantees. This multi-layer segmentation enables the system to maintain adaptability while ensuring reliable service quality through hierarchical connection management.

The patent introduces an intermediary aggregation node (ONU1/OLT2) that bridges the user side and network side. This intermediary performs service data aggregation and implements QoS policies, acting as a mediator that provides connection management and QoS mechanisms while maintaining network flexibility. The intermediary translates between different protocol requirements and ensures service quality.

The patent replaces the traditional active ETH-based aggregation network with a passive PON-based aggregation network. By using passive optical components (optical fibers, optical splitters, optical couplers) instead of active electronic equipment, the system eliminates the need for powered devices at aggregation points, reducing construction costs and operational expenses while maintaining connection management capabilities through protocol-level implementation.

The passive PON network enables self-service operation where the optical infrastructure automatically routes and aggregates traffic without requiring powered equipment or complex active management at intermediate points. The system uses upstream and downstream optical signals to automatically establish connections and manage services, eliminating the need for powered aggregation devices and reducing operational complexity.

The patent merges multiple service data streams from different users and services into aggregated data flows at the PON layers. By combining traffic aggregation, service delivery, and connection management into the PON architecture, the system improves scalability and efficiency while maintaining strong service delivery capabilities. The merging of functions at optical layers reduces the need for separate dedicated infrastructure.

The patent introduces a hierarchical dimension to the network architecture with multiple PON layers. This vertical dimensionality allows services to be delivered through layered aggregation points, improving scalability by enabling incremental network expansion. The multi-layer structure provides new dimensions for service routing and aggregation that enhance both scalability and delivery efficiency.