Nowadays GPON remains the most prevalent technology for FTTx network construction. However, its current bandwidth capabilities and its asymmetric characteristics do not provide enough capacity to support the the expected growth in bandwidth demand for users. Therefore operators are looking at the latest iterations of the PON standard – 10G PON – for their future network requirements.
In this article, we will explain how the GPON technology evolves and introduce to you the 10G GPON FTTH solutions in details.
GPON technology evolution
As we know, GPON was launched by ITU-T in 2013; EPON by IEEE in 2004. After 2010, with the rapid development of Internet such as video and games, users have a strong demand for network bandwidth, which has further stimulated the maturity of the 10G PON industry chain.
In recent years, increasing demand for faster broadband speeds; the need for a cost-effective converged network; as well as support for future 5G networks and services arevdriving 10G PON deployments. And in the past 2020, China’s three major operators have completed a number of 10G PON central office or terminal equipment collection.
10G PON is coming. Next-generation 10G-PON technologies offers both the capacity for today’s residential and business requirements as well as the ability to support future converged services architectures. Furthermore, the household peak usage can be increased from 5 and 10 Mbps to 50 and 100 Mbps. The biggest reason is that 10G PON provides more benefits than GPON.
(1) Higher bandwidth: Compared with GPON, the downstream bandwidth of 10G PON is increased by 4 times, and the upstream bandwidth is increased by 2 times. It only takes 40 seconds to download a Blu-ray movie!
(2) Higher cost performance: since there is no need to modify the ODN network, the 10G PON upgrade only needs to replace the central office OLT equipment and the terminal ONT equipment. At the same time, after the bandwidth is increased, especially supporting symmetrical bandwidth can expand more application scenarios and increase revenue.
10G GPON Networking
- (1) 10G GPON& GPON Hybrid Networking
With the development of services, the bandwidth requirement of users is gradually increasing. In the short term, only some users need to be upgraded to the 10G GPON network, and some users continue to use the GPON network. By fully utilizing the original ODN network, we can individually provide high speed bandwidth for some users based on the original GPON coverage area. In this way, 10G GPON and GPON network can share the same ODN. Since the 10G GPON and GPON wavelengths are different, here WDM1r Multiplexer can be used for hybrid networking.
GPON and 10G GPON can coexist in the same ODN with WDM mode.
Above picture shows the smooth evolution from the GPON network to the 10G GPON network by adding the WDM1r wavelength division multiplexing (WDM) equipment.
Evolution Solution Procedure:
1, Add 10G GPON service board on GPON OLT;
2, Add a WDM1r wavelength division multiplexing (WDM) device. Connect the backbone fiber of the GPON port and the 10G GPON port to the WDM1r multiplexer. The WDM1r multiplexes the GPON and 10G GPON wavelengths and transmits them to the ODN.
3, Add a 10G GPON ONU or replace a GPON ONU
4, After the GPON ONU is replaced with the 10G GPON ONU, the WDM1r multiplexer is removed, and the evolution is complete.
By this hybrid 10G GPON and GPON networking, GPON can be smoothly evolved to 10G GPON.
- (2) 10G GPON Individual Networking
By adding 10G GPON interface board on OLT side and connecting to 10G GPON ONT, we can achieve 10G GPON FTTx individual networking.
10G GPON Interface Board
10G GPON interface board has two types, one is XG-PON; another is XGS-PON.
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 ).
Table 1 Brief Comparison of 10G GPON Interface Board
|Name||GPON||XGPON||XGSPON||Port and SFP||Combo|
10G GPON ONT is also divided into XGPON and XGSPON ONT likewise. But now XGSPON is not fully commercialized, so XGPON ONT is the mainstream option in the China market, with models such as HN8346V5, HN8546X6, and HN8145V.
Truthfully, for a GPON network that has been deployed on the live network of a carrier, it is costly to directly cut over the GPON network to the 10G GPON network. However, the smooth evolution solution from GPON to 10G GPON can help them save much cost while at the same time meeting the some user’s demand for higher speed bandwidth.
With growing deployments worldwide combined with reduced cost of optics, hope soon will usher in the Year of 10G-PON globally.