PON Upstream Wavelength Path Signaling for Better Bandwidth Use
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Solution Overview
Problem
Conventional passive optical network (PON) technologies face challenges in flexibly indicating upstream wavelength paths, leading to inefficient bandwidth utilization and increased costs due to the need for pre-stored binding relationships between downstream and upstream wavelength paths.
Innovation Solution
A communication method that allows flexible indication of upstream wavelength paths in a PON system by using path identifiers in downstream frames, enabling separate transmission of upstream service data and registration requests without pre-stored bindings, thus improving bandwidth utilization and reducing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If optical modules are connected via cables in traditional communication systems, then connection stability is maintained, but device complexity and deployment difficulty increase due to manual cable installation and alignment
Solution Approach 1:
The patent merges the optical module with the transceiver by integrating the optical interface directly into the transceiver housing, eliminating the need for separate cable connections. The optical module includes a lens assembly that directly couples light between transceivers, combining what were previously separate components into a unified structure that simplifies deployment.
Solution Approach 2:
The patent introduces an optical interface as an intermediary between transceivers, replacing physical cable connections with optical coupling. This intermediary enables wireless-like optical communication while maintaining the stability of structured connections, eliminating manual cable installation and alignment requirements.
2Area of stationary object
If passive optical network is used to extend coverage, then service area is expanded, but signal loss increases over distance affecting transmission quality
Solution Approach 1:
The patent applies preliminary signal boosting at the OLT (Optical Line Terminal) end through optical signal amplification before transmission. This preliminary action compensates for anticipated signal loss over extended distances, enabling coverage expansion without quality degradation. The system pre-amplifies signals to ensure they maintain sufficient strength throughout the extended service area.
3Ease of manufacture
If existing communication infrastructure is utilized, then deployment cost is reduced, but network capacity and service quality remain limited
Solution Approach 1:
The patent changes the optical parameters of existing infrastructure by implementing wavelength division multiplexing (WDM) and optical signal amplification. These parameter changes enable existing fiber infrastructure to carry multiple wavelengths simultaneously, dramatically increasing network capacity without requiring new physical infrastructure deployment.
Solution Approach 2:
The patent makes existing optical infrastructure multi-functional by enabling it to support both traditional single-wavelength communication and new multi-wavelength high-capacity services. The same fiber infrastructure can simultaneously provide basic connectivity and enhanced bandwidth services, maximizing utilization of deployed assets.
Data Source
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AI summary
Embodiments of this application disclose a communication method based on a passive optical network, a related device, and a system. In a scenario in which the PON supports a plurality of wavelength paths, an OLT can flexibly indicate, to an ONU, an upstream wavelength path used to transmit upstream service data, to improve bandwidth utilization of the PON. The method includes: An OLT sends a first downstream frame to an activated ONU by using at least one downstream wavelength path, where the first downstream frame includes a first path identifier used to identify a first upstream wavelength path; and the OLT receives upstream service data from the activated ONU by using the first upstream wavelength path.