Kule mihla, ishishini lonxibelelwano laseTshayina likhula ngokukhawuleza, kwaye iimodyuli zefiber optic zihlala ziphuculwa kwaye ziphuculwa.Ukuvela kweemodyuli ze-PON eziphezulu ze-optical ziye zatshintsha ngokuthe ngcembe iifayili ze-optical zendabuko eziphantsi kwaye zisetyenziswa ngokubanzi.I-PON yohlulwe kwi-GPON kunye ne-EPON.I-GPON ingasetyenziswa.Ithi yinguqulelo ephuculweyo ye-EPON.
Kutheni ufuna ukwenza isindululo ngeGPON?
I-GPON inezinga eliphezulu le-Gigabit, i-92% yokusetyenziswa kwe-bandwidth kunye nokukwazi ukuxhasa ukuhanjiswa okucacileyo kweenkonzo ezininzi, ngelixa uqinisekisa umgangatho wenkonzo kunye nenqanaba, ukubonelela nge-carrier-class network monitoring and service management.
Xa kuthelekiswa nokusetyenziswa kwe-bandwidth, ixabiso, inkxaso yeenkonzo ezininzi, kunye nemisebenzi ye-OAM, i-GPON ingcono kune-EPON:
Ukusetyenziswa kwe-1.Bandwidth: Ngakolunye uhlangothi, i-EPON isebenzisa i-encoding ye-8B / 10B, yona ngokwayo ingenisa ilahleko ye-20%.Umyinge wothumelo lwe-1.25 Gbit/s eneneni kuphela yi-1 Gbit/s phambi kweprotocol yokucubungula.
2.Iindleko: Ngokwexabiso le-bit enye, ixabiso le-GPON liphantsi kune-EPON.
I-3.Inkxaso yeenkonzo ezininzi: Ukuhanjiswa kwe-EPON yeenkonzo ze-TDM zendabuko kuxhomekeke kwiingxaki ze-QoS.Ifomu yephakheji ekhethekileyo ye-GPON yenza ukuba ikwazi ukuxhasa iinkonzo ze-ATM kunye neenkonzo ze-IP, ukufezekisa inkonzo epheleleyo yokwenene.
Umsebenzi we-4.OAM: I-EPON ilawula kuphela imisebenzi eyisiseko efana ne-remote fault indicator, i-remote loopback control, kunye nokubeka iliso kwikhonkco, ngelixa eminye imisebenzi ye-OAM ehamba phambili inyuswa ngokuzimeleyo ngumenzi kwisixhobo.Imisebenzi ye-GPON OAM ibandakanya ulwabiwo lwe-bandwidth, ulwabiwo lwebhanwidth (DBA), ukujonga ikhonkco, ukutshintshwa kokukhusela, ukutshintshiselana okubalulekileyo, kunye nemisebenzi eyahlukeneyo ye-alamu.Ukusuka kwinqanaba lokujonga, ulwazi lweGPON OAM luninzi kakhulu kune-EPON.
Zeziphi iindlela ezimbini zothumelo lweGPON:
Enye yimowudi ye-ATM kwaye enye yimowudi ye-GPON yephakheji (GEM).Kwinkqubo yokudlulisa, i-GPON inokusebenzisa imo ye-ATM okanye i-GEM mode, okanye zombini iindlela zingasetyenziswa kunye.Yeyiphi indlela yokuyisebenzisa, khetha xa i-GPON iqalwa.Ifiber ye-Optical ineenzuzo zokulahlekelwa okuphantsi kunye nokugcinwa kwezixhobo.Ukuqwalasela izicelo ezininzi zebroadband kwixesha elizayo, amazwe amaninzi nangakumbi asebenzisa i-optical fiber njengendlela yothumelo.