Gpon

In the context of the data-processing networks of data transmission, GPON is the acronym of Gigabit Passive Optical Network .

GPON is an architecture of network (metropolitan) passive optical and a Pile of protocols of low level (OSI 1 and 2) standardized by ITU-T under the G.984.x reference. The flow can be symmetrical going up to 2.5 Gbps. Or asymmetrical with a channel going up (house towards exchange) minimum of 155 Mbps. The GPON finds its interest as soon as the diffusion is with the request such as for the video (VoD) on IP (IPTV).

Standard GPON succeeds the BPON (Broadband PON), but for reasons of performances, the committee in load of the development of the standard decided not to ensure complete compatibility between the two standards.

A network GPON usually transports screen S Ethernet. But it is also able to transport “nativement” of the loads ATM.

A screen GPON has interesting mechanisms intrinsically, such as:

Management of quality of service (QoS) as of the low layers levels.
Coding of the data using the algorithm AES (in meter mode), allowing a confidentiality point-with-point in the downward direction (central towards house) without having to resort to protocols of the roadbases. In the direction assembling this confidentiality is intrinsic with the architecture of a network PON.

In the direction going down, the transmission is done by diffusion: all the stations receive the data (what justifies coding). In the direction going up, all the stations must divide the band-width, which can impose the use of algorithms of dynamic allocation of band-width.

See too

FTTH
Internet
High banc
International union of Telecommunications: Flyer - G-PON

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