GPON ni iki?
Ikoranabuhanga rya GPON (Gigabit-Capable PON) nigisekuru gishya cyumuyoboro mugari wa pasiporo optique ihuriweho hamwe hashingiwe kuri ITU-TG.984.x. Ifite ibyiza byinshi nkumuyoboro mwinshi, gukora neza, gukwirakwiza cyane, hamwe nabakoresha interineti. Abakoresha benshi babifata nkikoranabuhanga ryiza ryo kumenya umurongo mugari no guhindura byimazeyo serivisi zurusobe.
GPON yasabwe bwa mbere n’umuryango FSAN muri Nzeri 2002. Hashingiwe kuri ibyo, ITU-T yarangije gushyiraho ITU-T G.984.1 na G.984.2 muri Werurwe 2003, irangiza G.984.1 na G.984.2 muri Gashyantare na Kamena. 2004. 984.3. Rero amaherezo yashizeho umuryango usanzwe wa GPON.
Imiterere shingiro yibikoresho bishingiye ku ikoranabuhanga rya GPON isa n'iya PON iriho. Igizwe kandiOLT(optique y'umurongo wa terefone) ku biro bikuru na ONT /ONU. ODN (Optical Distribution Network) igizwe na fibre ya SM hamwe na pasiporo itandukanya (Splitter) hamwe na sisitemu yo gucunga urusobe.
Kubindi bipimo bya PON, igipimo cya GPON gitanga umurongo mwinshi utigeze ubaho, hamwe nigipimo cyo hasi kigera kuri 2.5Gbit / s, kandi ibiranga asimmetrike birashobora guhuza neza nisoko rya serivise ya data. Itanga serivisi yuzuye ya QoS, kandi itwara ATM selile na (cyangwa) ama frame ya GEM icyarimwe. Ifite ubushobozi bwiza bwo gutanga urwego rwa serivisi, gushyigikira QoS garanti no kubona serivisi zuzuye. Iyo utwaye amakadiri ya GEM, serivisi za TDM zirashobora gushushanyirizwa kumurongo wa GEM, kandi ama frame 8kHz (125μs) arashobora gushyigikira serivisi za TDM. Nkurwego rwitumanaho urwego rwitumanaho, GPON irerekana kandi uburyo bwo kurinda no kuzuza imikorere ya OAM kurwego rwo kugera kumurongo.
Mubipimo bya GPON, ubwoko bwa serivisi zigomba gushyigikirwa zirimo serivisi zamakuru (serivisi za Ethernet, zirimo serivisi za IP na MPEG yerekana amashusho), serivisi za PSTN (POTS, serivisi za ISDN), imirongo yabugenewe (T1, E1, DS3, E3, serivisi za ATM). ) Na serivisi za videwo (videwo yububiko). Serivisi nyinshi muri GPON zashizwe kuri ATM selile cyangwa GEM kumurongo wohereza, zishobora gutanga QoS ingwate ijyanye nubwoko butandukanye bwa serivisi.