Ihe dị iche n'etiti DWDM na OTN

DWDM na OTN bụ sistemụ teknụzụ abụọ nke teknụzụ nnyefe nkewa ogologo oge mepụtara n'afọ ndị na-adịbeghị anya: Enwere ike iwere DWDM dị ka PDH gara aga (nzipu isi-site-point), a na-emechakwa ọrụ ịntanetị na nke na-anọghị n'ịntanetị na ODF site na jumpers siri ike; OTN dị ka SDH (ụdị netwọk dị iche iche), yana ọrụ nke njikọ obe (ma ọ bụ njikọ obe nke oyi akwa eletriki ma ọ bụ oyi akwa anya).

 Site na usoro IP niile na-aga n'ihu, ugbu a, n'agbanyeghị usoro ntọala mba, usoro ntọala mpaghara ma ọ bụ usoro WDM netwọk mpaghara, OTN bụ isi ihe a na-ahụkarị mgbe a na-ahọrọ akụrụngwa na ọkwa mbụ nke owuwu netwọk. Ngwa OTN ejirila nwayọọ nwayọọ dochie ngwa DWDM na uru pụrụ iche ya (Dị ka ngwa SDH na-anọchi ngwa PDH). Dịka teknụzụ ọhụrụ na ụdị ngwaahịa ọhụrụ, OTN aghọwo isi ihe ụlọ ọrụ dị ugbu a. Isiokwu a ga-enyocha ma tụnyere ngwa DWDM, ngwa OTN na teknụzụ.

1 Echiche ndị bụ isi nke DWDM na OTN

Site na mgbanwe nke ihe achọrọ maka ọrụ na nhazi, ọ dị mkpa ka e jiri eriri anya (otu eriri ma ọ bụ eriri abụọ) mee ọtụtụ ọrụ granularity dị iche iche wee kewaa ha n'ime ogologo ebili mmiri dị iche iche maka nnyefe ogologo oge. Teknụzụ multiplexing nkewa ebili mmiri na-apụta dịka oge si dị.

DWDM bụ multiplexing nkewa wavelength (Multiplexing nkewa Wavelength), nke na-eme ka ihe nrịbama anya nke wavelength dị iche iche banye n'otu eriri maka nnyefe. Teknụzụ WDM bụ teknụzụ nkewa wavelength ọdịnala tozuru oke ruo ihe karịrị afọ iri. Enwere ike kewaa ya n'ime nkọwapụta abụọ: sparse wavelength division multiplexing (CWDM), nwere nnukwu wavelength distance (20nm); dense wavelength division multiplexing (DWDM), nwere obere wavelength distance (erughị ma ọ bụ hà nhata 0.8nm). N'ihi obere anya nnyefe nke CWDM, a na-etinye ọtụtụ ngwaọrụ DWDM na netwọk nnyefe dị ugbu a nke ndị ọrụ dị iche iche.

Sistemụ DWDM mepere emepe nwere akụkụ ndị a: OTM na-arụcha ọrụ na ibuga na ibuga maka ọdụ ọdụ ahịrị optical, OA na-arụcha nhazi mmụba relay optical dị ọcha nke mgbaàmà multiplexed maka ọdụ mmụba ahịrị optical, OTU na-arụchakwa ìhè mgbaama ebili mmiri na-abụghị ọkọlọtọ iji zute ọrụ mgbanwe ebili mmiri G .694.1(2) nke ìhè mgbaama ebili mmiri ọkọlọtọ, OMU/ODU: na-eme ka multiplexing/demultiplexing nke ọkụ mgbaama ebili mmiri edobere G.694.1(2), OBA (ike amplifier) ​​na-eme ka ike nke mgbaama anya jikọtara ọnụ dịkwuo elu, si otú a na-eme ka ike optical mmepụta nke ebili mmiri ọ bụla dịkwuo elu, OPA (pre-amplifying) na-eme ka mmetụta nnata nke ebili mmiri ọ bụla dịkwuo mma site na ịbawanye ike optical nke mgbaama multiplexed input.

OTN bụ Network Transport Network (Optical Transport Network), nke a makwaara dịka OTH (Optical Transport Heerarchy) na ITU-T. E mepụtara ya dabere na nkewa ogologo oge ọdịnala ma jikọta uru nke DWDM na SDH. Ọ na-ejikọta uru nke nhazi mpaghara optical na nhazi mpaghara eletriki, na-enye nnukwu ikike nnyefe, njikọ ogologo oge/obere-wavelength doro anya kpamkpam na nchekwa ọkwa ụgbọelu, ọ bụkwa teknụzụ dị mma maka izipu ọrụ nnukwu-ngwugwu broadband. N'ime afọ ise gara aga, ndị ọrụ etinyela akụrụngwa OTN n'ọtụtụ buru ibu na netwọk nnyefe dị iche iche.

2 Ntụnyere nke njirimara teknụzụ nke DWDM na OTN

Ọ bụ ezie na sistemụ DWDM na-eme ka arụmọrụ nnyefe nke eriri anya dịkwuo mma nke ukwuu ma na-akwado nnyefe nke ọrụ nnukwu-granularity, n'ihi mmachi nke teknụzụ nkewa ogologo ebili mmiri, a na-ahazi ogologo ebili mmiri n'ụdị isi-ruo-isi ma enweghị ike ịgbanwe ya n'ụzọ dị iche iche. Ọnụego ojiji akụrụngwa adịghị elu, mgbanwe nke mgbanwe ọrụ ezughịkwa. Usoro azụmaahịa agbanweela, ọ dịkwa oke mgbagwoju anya ịgbanwe. Nhazi oge n'etiti ọrụ DWDM bụkarị nhazi oge anụ ahụ na ODF. Njikwa netwọk na-enyocha naanị arụmọrụ nke oyi akwa anya (byte njikwa netwọkụ dị ole na ole na ozi njikwa netwọkụ dị mfe), enwerekwa obere ụzọ nchọpụta nsogbu na nsogbu mmezi dị elu.

OTN ketara ọrụ nnyefe ikike dị ukwuu nke DWDM ma nwee ike ịhazi oge na nchekwa njikọ optoelectronic na-agbanwe agbanwe. Site na iwebata teknụzụ ROADM, teknụzụ OTH, nchekwa na njikwa G.709, ọ na-edozi nsogbu nke netwọk WDM ọdịnala na-enweghị ikike nhazi oge/obere wavelength. , Ike netwọk adịghị ike, ikike nchekwa adịghị ike na nsogbu ndị ọzọ. Okpokoro eletriki na-eme atụmatụ oge dabere na obere wavelengths (dịka GE, 2.5G, 10G, 40G, 100G particles), nhazi oge oyi na-adaberekarị na ogologo wavelengths 10G, 40G ma ọ bụ 100G, yana ojiji bandwidth dị elu; o nwere ọtụtụ bytes overhead, ọrụ OAM /P ya siri ike karịa WDM.

Tinyere nke a, enwere ike iji OTN na DWDM mee ihe n'otu n'ime oyi akwa anya, ihe dị iche bụ na OTN nwere obere oyi akwa eletriki. Ya mere, a na-agbakwunye ụfọdụ ngwaọrụ DWDM na netwọk dị ugbu a na obere fremu njikọ eletrọniki ma kwalite ya na OTN.

3 Ntụnyere netwọk DWDM na OTN

Njikọta OTN na DWDM ga-efunahụ uru nke OTN (usoro etiti ahụ dị iche na WDM ọdịnala, njikọ ahụ ga-enwekwa mmetụta).

Ebe ọ bụ na modulu ROADM (nke nwere mgba ọkụ WSS) na-arụ ọrụ nke ọma na njikọ OTN optical cross-connect, ebe ọ bụ na a na-atụle ọnụ ahịa dị elu nke ROADM, a na-eji OM/OD na OADM emepụta netwọk mgbanaka na netwọk yinye na netwọk OTN.

Maka netwọk ndị agbụkọtara agbụ (dịka ahịrị ogwe osisi dị anya), uru nke OTN apụtaghị ìhè nke ọma n'ihi ọrụ etiti na ụzọ nchekwa a kapịrị ọnụ, mana enwere uru n'akụkụ ụfọdụ (arụmọrụ ọwa dị elu na-eduga na ọnụ ahịa dị ala karịa WDM ọdịnala), netwọk ogwe osisi dị ugbu a na-ejikarị DWDM na OTN maka netwọk ndị a na-etinye n'elu.

Maka netwọk mpaghara, ebe ọ bụ na a na-ejikọ ọrụ ugboro ugboro, a na-agbanwe usoro netwọk ahụ ugboro ugboro ma hazie ya, a na-agbanwekwa usoro nchekwa ahụ n'ụzọ na-agbanwe agbanwe, WDM ọdịnala agaghị enwe ike ime nke ahụ. Uru nke iji netwọk OTN doro anya.

OTN na-enye ikike ijikwa ogologo ebili mmiri ọ bụla na eriri ọ bụla, OTN nwekwara ike imeghari nke ọma na mmepe netwọkụ n'ọdịnihu.

4 Ntụnyere nke Ọrụ DWDM na OTN Bearer

Ọchịchọ maka crossover eletriki OTN sitere na mpụta nke ọnụego 10G otu-ebili. Mgbe ọwa ruru 10G, OTU ya nwere ike ibu 4*2.5G ma ọ bụ 8 ruo 9 GE; DWDM na-eji usoro isi-ruo-isi. Ọ bụrụ na ọchịchọ ọrụ dị obere, itinye ego OTU yiri ka ọ bụ ihe efu. Iji mezuo nke a, ọ dị mkpa iwebata ọrụ cross-connect yiri SDH na DWDM, ka e wee nwee ike ịmepụta ọrụ cross-connect eletriki nke OTN.

OTN nwere ikike crossover eletriki, ya bụ, ikike crossover dị ala kwa ọwa (dịka SDH). N'otu oge ahụ, njikọ cross-optic na njikọ cross-optic na-adabereghị na ibe ha. Ọ bụrụ na enwere ikike njikọ cross-optic mana enweghị njikọ cross-optic, ma ọ bụ njikọ cross-optic na-enweghị njikọ cross-optic, a pụrụ ịkpọ ya OTN.

N'ihi ọdịiche dị n'ụdị owuwu netwọk (ọnụ ahịa, ihe ndị na-arụ ọrụ na ntụziaka mmiri), a na-ejikarị usoro crossover eletriki eme ihe na China, a na-ejikwa usoro crossover anya eme ihe na mba ofesi.

Mmechi 5

Site na nyocha na ntụnyere dị n'elu, a pụrụ ịhụ na OTN na DWDM dị iche nke ukwuu n'ihe gbasara teknụzụ na ojiji. Site n'echiche nke ikike njikọ, nhazi ọrụ na mgbanwe netwọk, OTN dị ike nke ukwuu ma nwee ike igbo mkpa nke njikọ netwọk n'ọdịnihu nke ọma.

N'ihi nghọta nke nnyefe ọrụ sistemụ OTN, ikike idozi njehie siri ike, ikike nhazi oyi akwa anya/ọkụ eletrik na-agbanwe agbanwe, ikike njikwa mmezi na oke ikike akụrụngwa (a na-ere ngwa 80*100G ugbu a), netwọk nnyefe dị iche iche Mwebata akụrụngwa OTN aghọwo ihe a na-apụghị izere ezere.