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Hierarchical model of GPON

GPON technical characteristics are mainly reflected in the transmission convergence layer. GPON protocol, in which the transport convergence layer is divided into PON framing sublayer and adaptive sublayer.


The framing sublayer of GTC (GPON Transmission Convergence) completes the encapsulation of the GTC frame, terminates the required ODN transmission function, and the specific functions of the PON (such as ranging, bandwidth allocation, etc.) are also terminated at the framing sublayer of PON. Gametes can not be seen.


The adaptation sub layer of the GTC provides the interface between the PDU and the upper layer entity. ATM and GEM information complete the business data unit (SDU) and protocol data unit PDU conversion in the respective sub-sub-layer. The OMCI adaptation sublayer is higher than the ATM and GEM adaptation sublayer, it recognizes VPI / VCI and Port - ID and completes the exchange of OMCI channel data with high - level entities.


GPON in the network applications

GPON can be applied to the fiber to the home, fiber to the floor / roadside and fiber to the transfer box in the access network.


1. FTTB for Business 

Symmetric broadband services (such as Group Software, Content Broadcast, E-mail, file interaction, etc.) POTS and ISDN private lines (GPON must be able to flexibly provide dedicated line services at different rates)


2 . FTTC and FTTCab

Asymmetric broadband services( such as digital Broadcast service, VOD,IPtv, file download, online games etc) 

Symmetric broadband services (such as Content Broadcast, E-mail, file interaction, remote education, remote diagnostics, etc.) POTS and ISDNxDSL extensions



3 . FTTH

 Asymmetric broadband services (such as digital broadcasting services, VOD, IPTV, file downloads, etc.)

 Symmetric broadband services (such as Content Broadcast, E-mail, file interaction, remote education, remote diagnostics, online games, etc.) POTS and ISDN


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