Ngophuhliso lweenkqubo zonxibelelwano lwe-optical kunye nomgama omde, umthamo omkhulu, kunye nesantya esiphezulu, ngakumbi xa izinga lamaza elinye livela kwi-40g ukuya kwi-100g okanye nakwi-super 100g, ukusasazeka kwe-chromatic, iziphumo ezingabonakaliyo, ukuchithwa kwemodi ye-polarization, kunye nezinye iziphumo zokuhambisa kwi-optical. ifayibha iyakuchaphazela ngokunzulu uphuculo olongezelelweyo lwezinga losulelo kunye nomgama wothumelo. Ngoko ke, iingcali zoshishino ziyaqhubeka nokuphanda kunye nokuphuhlisa iintlobo zekhowudi ze-FEC kunye nokusebenza okungcono ukufumana inzuzo ephezulu yekhowudi (NCG) kunye nokusebenza kakuhle kokulungiswa kwempazamo, ukuhlangabezana neemfuno zophuhliso olukhawulezayo lweenkqubo zonxibelelwano lwe-optical.
I-1, intsingiselo kunye nomgaqo we-FEC
I-FEC (ukulungiswa kwempazamo phambili) yindlela yokwandisa ukuthembeka konxibelelwano lwedatha. Xa isignali ye-optical iphazamisekile ngexesha lothumelo, isiphelo sokufumana sinokujonga kakubi i-"1" isignali njenge "0" yesiginali, okanye ungaqondi kakuhle uphawu "0" njenge "1" uphawu. Ngoko ke, umsebenzi we-FEC wenza ikhowudi yolwazi kwikhowudi enegunya elithile lokulungiswa kwephutha kwi-encoder yesiteshi ekupheleni kokuthumela, kunye ne-decoder yesiteshi ekupheleni kokufumana ikhowudi efunyenweyo. Ukuba inani leempazamo eziveliswe kwi-transmission lingaphakathi koluhlu lwekhono lokulungiswa kwempazamo (iimpazamo ezingapheliyo), i-decoder iya kufumana kwaye ilungise iimpazamo ukuphucula umgangatho wesignali.
I-2, Iindidi ezimbini zeendlela ezifunyenweyo zokucwangcisa umqondiso we-FEC
I-FEC inokohlulwa ibe ziindidi ezimbini: ukucazulula ngesigqibo esinzima kunye nesigqibo esithambileyo. Ukwenziwa kwesigqibo esinzima yindlela yokuguqula ikhowudi esekelwe kwimbono yemveli yekhowudi yokulungisa iimpazamo. I-decoder ithumela umphumo wesigqibo kwi-decoder, kwaye i-decoder isebenzisa i-algebraic structure ye-codeword ukulungisa impazamo ngokwesiphumo sesigqibo. Ukwenziwa kweekhowudi kwezigqibo ezithambileyo kunolwazi oluthe kratya lwetshaneli kunokugqiba ngesigqibo esinzima. Idikhowuda ingalusebenzisa ngokupheleleyo olu lwazi ngokwenziwa kweekhowuwudi ukuze kufumaneke inzuzo enkulu yokukhowudwa kunokwakheka kwezigqibo ezinzima.
3, Imbali yoPhuhliso ye-FEC
I-FEC iye yafumana izizukulwana ezithathu ngokwexesha kunye nokusebenza. Isizukulwana sokuqala se-FEC samkela ikhowudi yebhloko yesigqibo esinzima. Ummeli oqhelekileyo ngu-RS (255239), ebhalwe kwi-ITU-T G.709 kunye ne-ITU-T g.975 imigangatho, kunye ne-codeword overhead yi-6.69%. Xa imveliso i-ber=1e-13, inzuzo yayo yokubhalwa kwekhowudi imalunga ne-6dB. Isizukulwana sesibini i-FEC samkela isigqibo esinzima esidityanisiweyo ikhowudi, kwaye sisebenza ngokubanzi ukuhambelana, ukushiyana, ukuchazwa kwekhowudi, kunye nobunye ubuchwepheshe. I-codeword overhead iseyi-6.69%. Xa imveliso ye-ber = i-1e-15, inzuzo yayo yekhowudi ye-net ingaphezulu kwe-8dB, enokuxhasa iimfuno zokuhambisa umgama omde we-10G kunye ne-40G iinkqubo. Isizukulwana sesithathu se-FEC sithatha isigqibo esithambileyo, kwaye i-codeword overhead yi-15% -20%. Xa imveliso ye-ber = 1e-15, inzuzo yekhowudi yomnatha ifikelela malunga ne-11db, enokuxhasa iimfuno zokuhambisa umgama omde we-100g okanye iinkqubo eziphezulu ze-100g.
4, Ukusetyenziswa kwe-FEC kunye ne-100g imodyuli ye-optical
Umsebenzi we-FEC usetyenziswa kwiimodyuli ze-high-speed optical ezifana ne-100g. Ngokuqhelekileyo, xa lo msebenzi uvuliwe, umgama wokuhanjiswa kwemodyuli ye-high-speed optical iya kuba yinde kunokuba umsebenzi we-FEC ungavulwanga. Umzekelo, iimodyuli ze-100g zamehlo zinokufikelela ngokubanzi kwi-80km. Xa umsebenzi we-FEC uvuliwe, umgama wokudlulisa nge-fiber optical mode enye unokufikelela kwi-90 km. Nangona kunjalo, ngenxa yokulibaziseka okungenakuphepheka kwezinye iipakethi zedatha kwinkqubo yokulungiswa kweempazamo, ayizizo zonke iimodyuli ze-high-speed optical zinconywa ukuba zivumele lo msebenzi.
I-Shenzhen HDV photoelectric Technology Co., Ltd.Imveliso zonxibelelwano eziveliswe yinkampani zigubungela;
Iindidi zeemodyuli:iimodyuli zefiber optical, Iimodyuli ze-Ethernet, iimodyuli ze-fiber optical transceiver, iimodyuli zokufikelela kwifiber optical, Iimodyuli ze-SSFP ezibonakalayo, kwayeI-SFP optical fibers, njl.
I-ONUudidi:EPON ONU, AC ONU, ifayibha optical ONU, CATV ONU, GPON ONU, XPON ONU, njl.
OLTiklasi:Ukutshintsha OLT, GPON OLT, EPON OLT, unxibelelwanoOLT, njl.
Iimveliso zemodyuli ezingentla zinokubonelela ngenkxaso yeemeko ezahlukeneyo zenethiwekhi. Iqela le-R&D elinobuchule kunye nelomeleleyo linokunceda abathengi abanemiba yobugcisa, kwaye iqela leshishini elicingayo nelinobuchule linokunceda abathengi bafumane iinkonzo ezikumgangatho ophezulu ngexesha lokubonisana kwangaphambili kunye nomsebenzi wasemva kokuvelisa. Wamkelekile kuweQhagamshelana nathikulo naluphi na uhlobo lombuzo.
