2022-10-09 0

XG(S)-PON Knowledge Sorting

Hello, everyone!

Today, I’d like to briefly introduce XG(S)-PON.

GPON Evolution

1. The following figure shows the evolution of GPON technology.

XG(S)-PON Knowledge Sorting-1

XG-PON, 10-Gigabit-capable passive optical network, provides asymmetric 10G transmission (Maximum downstream line rate: 9.953 Gbit/s, Maximum upstream line rate: 2.488 Gbit/s ).

XGS-PON, 10-Gigabit-capable symmetric passive optical network, provides symmetric 10G transmission (Maximum downstream line rate: 9.953 Gbit/s, Maximum upstream line rate: 9.953 Gbit/s ).

2. The following figure shows the progress of the XG(S)-PON standard.

XG(S)-PON Knowledge Sorting-2

In June 2016, released the 10-Gigabit-capable symmetric passive optical network (XGS-PON) standard (G.9807.1).

XG(S)-PON Network Architecture

The XG(S)-PON network structure is the same as the GPON network structure. The XG(S)-PON network complies with the P2MP architecture of the standard PON network.

XG(S)-PON Knowledge Sorting-3

The XG(S)-PON network contains an optical line terminal (OLT), like MA5800 X2/MA5800 X15/MA5800 X17 support XGS-PON technology,  optical network units (ONUs), and an optical distribution network (ODN).

The optical line terminal (OLT) is an aggregation device located at the central office (CO) for terminating the PON protocol.

Optical network units (ONUs) are located on the user side, providing various types of ports for connecting to user terminals.

The optical distribution network (ODN) is composed of passive optical components (POS) such as optical fibers, and one or more passive optical splitters. It interconnects the OLT and ONUs.

Specification Differences Between GPON, XG-PON, and XGS-PON

Item GPON XG(S)-PON
XG-PON XGS-PON
Wavelength range Downstream: 1480 nm-1500 nm

Upstream: 1290 nm-1330 nm

 Downstream: 1575 nm – 1580 nm

Upstream: 1260 nm – 1280 nm

 Downstream: 1575 nm – 1580 nm

Upstream: 1260 nm – 1280 nm
Center wavelength Downstream: 1490nm

Upstream: 1310nm

 Downstream: 1577nm

Upstream: 1270nm

 Downstream: 1577nm

Upstream: 1270nm
Maximum Line Rate Downstream: 2.488Gbit/s

Upstream: 1.244Gbit/s

 Downstream: 9.953Gbit/s

Upstream: 2.488Gbit/s

 Downstream: 9.953Gbit/s

Upstream: 9.953Gbit/s
Frame Structure GEM XGEM XGEM

Why XG(S)-PON?

XG(S)-PON is evolved from the existing GPON technology, the factors promoting the technology evolution to XG(S)-PON are as follows:

1. Developing services require higher bandwidths and the GPON technology cannot meet bandwidth requirements.

2. Innovative access technologies on the user side require higher bandwidths and the GPON technology will face bandwidth bottlenecks.

3. A greater split ratio and a longer transmission distance increase network construction investments.

I hope that today’s content will help you understand the basic contents of XG(S)-PON.

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