GPON ke eng?
Theknoloji ea GPON (Gigabit-Capable PON) ke moloko oa morao-rao oa broadband passive optical integrated access standard e thehiloeng ho ITU-TG.984.x standard.E na le melemo e mengata joalo ka bandwidth e phahameng, ts'ebetso e phahameng, tšireletso e kholo, le lihokelo tse ruileng tsa basebelisi.Basebelisi ba bangata ba e nka e le thekenoloji e nepahetseng ea ho fumana li-broadband le phetoho e felletseng ea lits'ebeletso tsa marang-rang.
GPON e ile ea qalisoa ka lekhetlo la pele ke mokhatlo oa FSAN ka September 2002. Motheong ona, ITU-T e phethile tlhahiso ea ITU-T G.984.1 le G.984.2 ka March 2003, 'me e qetile G.984.1 le G.984.2 ka February le June. 2004. 984.3 maemo.Kahoo qetellong ho thehile lelapa le tloaelehileng la GPON.
Sebopeho sa motheo sa thepa e thehiloeng theknoloji ea GPON e tšoana le ea PON e teng.E boetse e entsoe ka OLT (optical line terminal) ofising e bohareng le ONT/ONU (terminal ea optical network kapa e bitsoang optical network unit) lehlakoreng la mosebelisi.ODN (Optical Distribution Network) e entsoeng ka SM fiber le passive splitter (Splitter) le tsamaiso ea tsamaiso ea marang-rang.
Bakeng sa litekanyetso tse ling tsa PON, tekanyo ea GPON e fana ka li-bandwidth tse phahameng tse e-s'o ka tsa e-ba teng, tse nang le tekanyo e tlaase ea ho fihla ho 2.5Gbit / s, 'me litšoaneleho tsa eona tsa asymmetric li ka ikamahanya hantle le' maraka oa tšebeletso ea data ea broadband.E fana ka tiiso ea tšebeletso e feletseng ea QoS, 'me e jara lisele tsa ATM le (kapa) liforeimi tsa GEM ka nako e le' ngoe.E na le bokhoni bo botle ba ho fana ka maemo a lits'ebeletso, ts'ehetso ea netefatso ea QoS le phihlello ea litšebeletso tse felletseng.Ha u nkile liforeimi tsa GEM, litšebeletso tsa TDM li ka etsoa 'mapa ho liforeimi tsa GEM, 'me liforeimi tse tloaelehileng tsa 8kHz (125μs) li ka tšehetsa litšebeletso tsa TDM ka kotloloho.Joalo ka tekanyetso ea tekheniki ea boemo ba mehala, GPON e boetse e totobatsa mokhoa oa ts'ireletso le mesebetsi e felletseng ea OAM maemong a marang-rang a phihlello.
Boemong ba GPON, mefuta ea litšebeletso tse hlokang ho tšehetsoa li kenyelletsa lits'ebeletso tsa data (litšebeletso tsa Ethernet, ho kenyeletsoa lits'ebeletso tsa IP le melapo ea video ea MPEG), lits'ebeletso tsa PSTN (POTS, lits'ebeletso tsa ISDN), mela e inehetseng (T1, E1, DS3, E3, le litšebeletso tsa ATM).) Le lits'ebeletso tsa video (video ea digital).Litšebeletso tse ngata ho GPON li entsoe ka 'mapa ho lisele tsa ATM kapa liforeimi tsa GEM bakeng sa phetisetso, tse ka fanang ka litiiso tse tsamaellanang tsa QoS bakeng sa mefuta e fapaneng ea litšebeletso.