This paper presents a comprehensive review of methods aimed at improving the energy efficiency (EE) of wired access passive optical networks (PONs) and active optical networks (AONs). Traditional active networks (such as DSL and HFC) rely on a large number of active electronic devices for signal amplification and switching, resulting in high operating costs and carbon emissions. Passive Optical Network (PON), with its “ passive ” feature, has become one of the key technologies. GPON is a type of Access Network, similar to Gigabit Ethernet Passive Optical Network (GEPON), which provides various services to end users through a local network. We propose a multi-user low-upstream-loss. This article introduces the technologies that con-tribute to low latency and power saving of optical access networks being researched and developed by the Optical Access System Project at NTT Access Network Service Systems Laboratories. The low-power-consumption intelligent ODN system comprises an intelligent management terminal, a master control management disk and a plurality of.
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