Access Network Technical Requirements 50Gbit/s Passive Optical Network Part 1: General Requirements
1Key Takeaways
This document specifies the overall requirements for 50Gbit/s Passive Optical Network (50G PON) in terms of business, physical layer, system level, management and maintenance and environment, power supply, and electrical safety. This document is applicable to the development and application of 50G PON equipment for pub…
2Expert Interpretation
An in-depth interpretation of the YD/T XXXX.1-202X "50G PON General Requirements" standard, covering core technical specifications such as system architecture, wavelength planning, coexistence solutions, physical layer parameters and management requirements, and providing a next-generation optical access network deployment guide for 5G bearer and industrial Internet.
Analysis of 50G PON Standard Technical Framework
As the evolution technology of 10G PON, the 50G PON standard defines the system-level technical requirements between OLT and ONU, mainly including:
| Technical Dimensions | 10G PON | 50G PON | Evolution Differences |
|---|---|---|---|
| Operating Wavelength | 1577nm/1270nm | 1340-1344nm/1290-1310nm | New C-band Extension |
| Rate Configuration | 10G/2.5G | 50G/12.5G/25G | 5x Bandwidth Improvement |
| Split Ratio | 1:64 | 1:256 (Logical) | 4x Access Density |
Detailed Explanation of Key Technical Features
Wavelength Planning and Coexistence Solution
The standard stipulates a downstream wavelength range of 1340-1344nm, and uses MPM modules or independent CEx devices to achieve coexistence with XG(S)-PON:
- MPM solution: integrated WDM function, optical power budget 32dB
- Independent CEx solution: requires external filter, supports 35dB budget
Core parameters of the physical layer
An operator piloted the use of N1 (29dB) power level, and actual measurements showed that:
| Transmission distance when splitting ratio | 1:64 | Transmission distance when 1:32 |
| 20km | BER≤1E-3 | BER≤1E-4 |
Implementation suggestions for typical application scenarios
5G fronthaul scenarios
Key points to pay attention to:
- Time-sensitive service guarantee (<1.5ms)
- IEEE 1588v2 clock synchronization
- Network slice isolation
Industrial Internet scenario
Recommended configuration:
- SP+WRR hybrid scheduling strategy
- 8 levels of QoS priority
- 2048kbit/s circuit emulation