What is XGPON, XGSPON technology?
XGS-PON is an access network technology that supports symmetrical 10Gbit/s transmission speed. Both XG-PON and XGS-PON belong to the GPON series.
From the technical roadmap, XGS-PON is the technical evolution of XG-PON. This technology was released by the State Administration for Market Regulation and the National Standardization Administration on March 15, 2024, and is scheduled to be implemented on July 1, 2024. XGS-PON uses broadcast for downstream and TDMA (time division multiple access) for upstream. It has the same downstream wavelength and rate as XG-PON, so it can naturally support hybrid access with XG-PON. In addition, XGS-PON also supports sharing ODN (optical distribution network) with GPON, and realizes hybrid access of three types of ONU (optical network unit) through the Combo solution, namely XGS-PON, XG-PON and GPON. The implementation of this technology has greatly enhanced the multi-service access capability of the PON network and is considered to be one of the important technologies for future access technologies to meet the needs of multi-service fiber access networks.
The implementation of XGS-PON technology not only improves data transmission efficiency, but also provides higher bandwidth demand support for home users and enterprises. For example, the world's first XGS-PON terminal device ZXHN F2866S released by ZTE in 2016 integrates cutting-edge technologies such as XGS-PON, 802.11ac WAVE2, 10G Ethernet and USB3.0, and supports 10G Ethernet interfaces at full line speed for both upstream and downstream. While meeting the ultra-fast bandwidth needs of home users in the era of big video, it can also connect to enterprise switches/routers through 10G Ethernet interfaces to meet the application needs of FTTO scenarios.
XG-PON and XGS-PON are both 10G PON. The main difference is that XG-PON is an asymmetric PON with an upstream/downstream rate of 2.5G/10G; XGS-PON is a symmetric PON with an up/down rate of 10G/10G
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The main PON technologies currently used are GPON and XG-PON, both of which are asymmetric PON. Since the user's upstream/downstream data is generally asymmetric, taking a first-tier city as an example, the upstream traffic of the OLT is only 22% of the downstream traffic on average, so the technical characteristics of asymmetric PON basically match the needs of users. More importantly, the upstream rate of asymmetric PON is low, the cost of the laser and other transmission components in the ONU is low, and the equipment price is also correspondingly low.