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400 gigabit Ethernet (400GbE)

400 Gigabit Ethernet (400GbE) is a project initiated by IEEE 802.3 for a 400 Gbit/s Ethernet variant. Ethernet with data rates above 100 Gbit/s are referred to as Terabit Ethernet( TbE). This project is being dealt with in the IEEE working group 802.3bs. The high data rate of 400 Gbit/s is aimed at applications in data centers and at the transmission of video and ultra HDTV, which are increasingly being transmitted via the Internet and less frequently via satellite, broadband cable networks or radio. It represents the intermediate step for later terabit data rates.

Service providers have already picked up on this trend, offering high-speed Internet for video channels. They have also defined an optical transport network to cope with these data rates. As far as the required HD quality is concerned, many customers can access 60 Mbit/s in the connection area. The high data rates must be realized all the way into the data centers. Hence the 400 Gbps and, as far as the data centers themselves are concerned, the Next Generation Base-T( NGBASE-T).

GbE constellations depending on the number of lanes

GbE constellations depending on the number of lanes

The realization of the high data rate of 400 Gbit/s can be based on the transmission of 25 Gbit/s over 16 duplex multimode fibers, or with 50 Gbit/s over 8 lanes or with 100 Gbit/s over 4 lanes. Alternatively, transmission can be based on Short Wave Division Multiplexing( SWDM) in combination with Wideband Multimode Fiber(WBMMF). With this technique, the 400 Gbps can be transmitted with four multiplexed 100 Gbps.

Several interfaces with multimode fibers and monomode fibers are available as physical 400GbE interfaces for 400 Gigabit Ethernet: With multimode fibers, distances of over 100 m can be bridged. With single mode fibers 500 m, 2 km and 10 km.

Englisch: 400 gigabit Ethernet - 400GbE
Updated at: 21.07.2017
#Words: 278
Links: Gigabit Ethernet (GbE), project, IEEE 802.3, data, terabit Ethernet (TbE)
Translations: DE

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