XFP Transceiver with Integrated FEC for Extended Reach
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Solution Overview
Problem
Current optical transceivers, particularly those defined by multi-source agreements (MSAs), have limitations in reach and functionality, as they only support distances up to 80 km and lack integration of forward error correction (FEC) and advanced operations, administration, maintenance, and provisioning (OAM&P) features, necessitating external equipment for enhanced performance.
Innovation Solution
The integration of FEC and G.709 framing within the optical transceiver, along with OAM&P capabilities, while maintaining compatibility with existing MSA specifications, allows for extended reach and enhanced performance without the need for external amplifiers or dispersion compensation, enabling seamless operation in metro, regional, and core network applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If MSA specifications are followed to maximize density and minimize cost, then manufacturing cost and device density are improved, but transmission reach and advanced functionality deteriorate (limited to 80 km without FEC)
Solution Approach 1:
The patent integrates FEC encoding/decoding functionality directly into the optical transceiver module, merging previously separate FEC equipment with the transceiver. This allows the transceiver to extend transmission reach beyond 80 km while maintaining MSA compliance and avoiding the need for external FEC equipment, thus resolving the contradiction between manufacturing simplicity and extended reach capability
Solution Approach 2:
The optical transceiver is enhanced with multi-functionality by incorporating FEC, G.709 framing, and OAM&P capabilities within a single MSA-compliant device. This universal design allows the same transceiver form factor to provide both cost-effective manufacturing benefits and advanced transmission functions including extended reach, eliminating the need for multiple specialized devices
2Device complexity
If MSA specifications are followed to maximize density and minimize cost, then device density and manufacturing simplicity are improved, but functionality and performance deteriorate (lack of integrated FEC and OAM&P)
Solution Approach 1:
The patent combines FEC encoding/decoding, G.709 framing, and OAM&P functions into the optical transceiver module, merging previously separate functionalities into a single integrated device. This resolves the contradiction by maintaining the simple MSA-compliant form factor while adding advanced functionality, allowing the device to adapt to diverse network applications without increasing structural complexity
Solution Approach 2:
The enhanced optical transceiver achieves multi-functionality by incorporating FEC, framing, and OAM&P capabilities within the MSA specification framework. This universal design enables a single device type to provide multiple functions (transmission, error correction, framing, monitoring) without requiring different device structures, thus maintaining simplicity while expanding adaptability
3Reliability
If external equipment is used for FEC and dispersion compensation, then transmission performance is improved, but device complexity and cost increase
Solution Approach 1:
The patent merges FEC encoding/decoding and dispersion compensation capabilities directly into the optical transceiver module, eliminating the need for external FEC equipment and dispersion compensation devices. This integration maintains high transmission performance and reliability while reducing system complexity to a single MSA-compliant transceiver unit
Solution Approach 2:
The patent extracts the FEC and dispersion compensation functions from external equipment and relocates them within the optical transceiver module. This extraction resolves the contradiction by removing the need for complex external system configurations while preserving the transmission performance benefits of FEC and dispersion compensation
Data Source
AI summary
Integrated performance monitoring (PM); optical layer operations, administration, maintenance, and provisioning (OAM&P); alarming; amplification, or the like is described in optical transceivers, such as multi-source agreement (MSA)-defined modules. An optical transceiver defined by an MSA agreement can include advanced integrated functions for carrier-grade operation which preserves the existing MSA specifications allowing the optical transceiver to operate with any compliant MSA host device with advanced features and functionality. An XFP module can include integrated circuitry configured to provide forward error correction encoding and decoding; a transmitter communicatively coupled to the integrated circuit; a receiver communicatively coupled to the integrated circuit; and a module housing in which the integrated circuitry, the transmitter, and the receiver are disposed, wherein the module housing is pluggable in a host device configured to operate the pluggable optical transceiver, and wherein the forward error correction encoding and decoding is performed transparently to the host device.