Sib Txawv ntawm Fiber Latency thiab Copper Latency?
Fiber optic sib txuas lus tau loj hlob sai heev nyob rau hauv xyoo tas los. Thiab nyob rau hauv ntau daim ntawv thov fiber optic cable tau hloov tooj cable rau kev ceev dua thiab ntau dua bandwidth ntawv. Yog li ntawd, tus xov tooj ntawm cov neeg hais tias fiber ntau optic muaj tsawg latency dua tooj sib txuas, tab sis lwm tus tsis xav li ntawd. Ces dab tsi yog qhov latency sib txawv ntawm fiber ntau thiab tooj?
Latency hais txog lub sij hawm qeeb ntawm kev txhawb zog thiab nws cov lus teb. Feem ntau, nws yog tshwm sim los ntawm kev tshaj tawm cov kev txwv hauv lub cev. Muab tso rau hauv cov lus yooj yooj yim, latency yog lub sij hawm uas nws siv rau lub teeb liab mus los ntawm ib qhov chaw mus rau lwm qhov chaw. Thiab muaj ntau hom kev latency: network latency, Internet latency, latency audio, WAN latency, thiab lwm yam. Tsis muaj mater nyob rau hauv lub fibre optic network los yog ib lub tshuab tooj liab, latency yuav piav raws li nrug thiab ceev. Tsis tas li, latency yeej muaj nyob. Nws tsuas yog lo lus nug ntawm kev ceev lossis qeeb. Ib qho tseem ceeb uas cuam tshuam rau latency yog lub teeb liab ntawm kev tshaj tawm hauv xov xwm. Fiber ntau thiab tooj yog ob hom kev tshaj tawm. Hom xov xwm siv hauv kev sib txuas lus nruab nrab yog nyob ntawm qhov bandwidth thiab kis tau nrug ntawm daim ntawv thov.
Raws li peb paub, qhov ceev ntawm lub teeb nyob hauv qhov chaw dawb yog li ntawm 3 × 108 mais ib pliag. Thaum lub sij hawm ceev ceev ntawm cov huab cua yog qeeb tshaj qhov ntawd hauv lub tshuab nqus tsev. Yog li tsis nyob rau hauv lub khob. Vim li no, thaum lub teeb meem kho qhov muag tawm hauv qhov txuas ntawm fiber ntau, muaj tsib latency contributors: ob leeg tsim thaum lub teeb liab txav ntawm hluav taws xob sau rau qhov kho qhov muag; lwm tshab tshwm sim thaum lub teeb liab mus dhau ntawm cov khoom siv fais fab; thiab raws li lub teeb liab raug hloov los ntawm qhov pom kev nkag mus rau hluav taws xob, latency tshwm sim.
Pib ntsais koj teeb nyob rau hauv cov tooj cua tooj yog yooj yim los cuam tshuam los ntawm ib puag ncig ib puag ncig, tshwj xeeb tshaj yog nyob rau hauv kis ntev kis. Cov teeb meem yuav ua rau pom kev nce siab ntxiv, uas yuav ua rau cov ntaub ntawv xa xov quab yuam, nplooj ntawv yuam kev thiab ua rau cov neeg siv qeeb qeeb ceev thaum lub sijhawm. Yeej yog cov xaim tooj liab kis tau sai tsis qeeb qeeb. Dhau li ntawd, neeg txawv tebchaw tseem tuaj yeem ua rau kis tsis zoo thiab latency.
Pib ntsais koj teeb raug xa mus rau ntawm 2/3 ntawm qhov kaj ntawm lub teeb nyob rau hauv fiber ntau optic cables. Hauv tooj nws yuav ua sai dua qhov ntawd. Txawm li cas los xij, qhov no tsis tuaj yeem kaw qhov system latency. Nyob rau hauv ntev deb, latency nyob rau hauv fiber ntau optic system yog tsawg dua vim hais tias tsawg dua yuav tsum tau ua thiab rov qab ntawm cov teeb liab. Thaum lub sij hawm pib ntsig txog tooj liab yog cuam tshuam los ntawm electromagnetic cuam tshuam thiab yog nws cov nqi ntau tshaj kev poob ntev ntev.
Tsis tas li ntawd, tsis muaj moj hauv lub tshuab fais fab lossis ib lub tshuab tooj liab, latency yuav piav tau deb thiab kev khiav ceev. Ntxiv mus, thaum lub sij hawm kev sib kis tag nrho, kev lag luam ncua sijhawm uas qhia tau hais tias sai npaum li cas cov ntaub ntawv ntim tau tawm mus rau lub xaim, muaj kev cuam tshuam ntau dua rau qis dua. Piv txwv, nws yuav siv sij hawm 8ms rau serialize ib pob ntawv 1500-byte rau 1.5Mbps txuas, thaum nws tsuas yuav tsum tau 1.2us ntawm 10Gbps, los yog tsawg dua rau kev ceev dua. Uas qhia tau tias ceev ua qhov txawv txav.
Hauv ib lo lus, qhov latency sib txawv ntawm fiber ntau thiab tooj yog cuam tshuam los ntawm kis nrawm, ceev thiab ib puag ncig. Rau luv nrug, tooj liab cab yuav yog thawj kev xaiv, rau qhov qeeb ntawm nws tsis txhais tau ntau thiab nws cov nqi qis. Kev kis tau ntev dua, fiber ntau cable muaj tsawg latency rau tag nrho lub network thiab tuaj yeem yog qhov kev xaiv tau