Muva nje, umngane ubebuza, mangaki amakhamera okuqapha inethiwekhi angashintsha ukushayela?Mangaki ama-switch gigabit angaxhunywa kumakhamera enethiwekhi ayizigidi ezi-2?24 amakhanda enethiwekhi, ngingasebenzisa 24-port 100M switch?inkinga enjalo.Namuhla, ake sibheke ubudlelwano phakathi kwenani lamachweba okushintsha kanye nenani lamakhamera!
1. Khetha ngokuya ngokusakazwa kwekhodi kanye nenani lekhamera
1. Ukusakaza ikhodi yekhamera
Ngaphambi kokukhetha iswishi, qala uthole ukuthi isithombe ngasinye sinomkhawulokudonsa ongakanani.
2. Inani lamakhamera
3. Ukuthola umthamo womkhawulokudonsa weswishi.Amaswishi asetshenziswa kakhulu ama-switch ayi-100M kanye namaswishi e-Gigabit.Umkhawulokudonsa wabo wangempela ngokuvamile ungama-60 ~ 70% kuphela yenani lethiyori, ngakho-ke umkhawulokudonsa otholakalayo wamachweba wabo ucishe ube ngu-60Mbps noma u-600Mbps.
Isibonelo:
Bheka ukusakaza okukodwa ngokohlobo lwekhamera ye-IP oyisebenzisayo, bese ulinganisela ukuthi mangaki amakhamera angaxhunywa kusiwishi.Ngokwesibonelo :
①1.3 million: Ukusakaza okukodwa kwekhamera ye-960p kuvamise ukuba ngu-4M, neswishi engu-100M, ungakwazi ukuxhuma amayunithi angu-15 (15×4=60M);nge-gigabit switch, ungaxhuma i-150 (150×4=600M).
②2 million: Ikhamera engu-1080P enokusakaza okukodwa ngokuvamile engu-8M, ene-switch engu-100M, ungakwazi ukuxhuma amayunithi angu-7 (7×8=56M);nge-gigabit switch, ungakwazi ukuxhuma amayunithi angu-75 (75×8=600M) Lawa ajwayelekile Thatha ikhamera ye-H.264 njengesibonelo sokukuchazela, i-H.265 ingancishiswa ngohhafu.
Ngokwe-topology yenethiwekhi, inethiwekhi yendawo ngokuvamile iyisakhiwo esinezingqimba ezimbili kuya kwezintathu.Isiphetho esixhuma kukhamera isendlalelo sokufinyelela, futhi ukushintshwa kwe-100M ngokuvamile kwanele, ngaphandle uma uxhuma amakhamera amaningi kuswishi eyodwa.
Isendlalelo sokuhlanganisa nesendlalelo esiyinhloko kufanele kubalwe kuye ngokuthi zingaki izithombe ezihlanganisiwe zeswishi.Indlela yokubala imi kanje: uma uxhumeke kukhamera yenethiwekhi ye-960P, ngokuvamile phakathi kwamashaneli angu-15 ezithombe, sebenzisa ukushintshwa kwe-100M;uma iziteshi ezingaphezu kwe-15, sebenzisa i-gigabit switch;uma uxhumeke kukhamera yenethiwekhi ye-1080P, ngokuvamile phakathi kwamashaneli angu-8 ezithombe, sebenzisa ukushintsha okungu-100M, iziteshi ezingaphezu kweziyisi-8 zisebenzisa amaswishi e-Gigabit.
Okwesibili, izidingo zokukhetha zokushintsha
Inethiwekhi yokuqapha inokwakheka kwezendlalelo ezintathu: isendlalelo esiyinhloko, isendlalelo sokuhlanganisa, nesendlalelo sokufinyelela.
1. Ukukhethwa kwamaswishi esendlalelo sokufinyelela
Umbandela 1: Ukusakaza kwekhodi yekhamera: 4Mbps, amakhamera angu-20 ngu-20*4=80Mbps.
Okusho ukuthi, imbobo yokulayisha yokushintsha isendlalelo sokufinyelela kufanele ihlangabezane nemfuneko yezinga lokudlulisela elingu-80Mbps/s.Uma kucatshangelwa izinga langempela lokudlulisela leswishi (ngokuvamile u-50% yenani elivamile, i-100M icishe ibe ngu-50M), ngakho isendlalelo sokufinyelela Iswishi kufanele ikhethe iswishi enembobo yokulayisha engu-1000M.
Isimo sesi-2: Umkhawulokudonsa ongemuva weswishi, uma ukhetha iswishi yembobo engama-24 enezimbobo ezimbili eziyi-1000M, isamba samachweba angama-26, khona-ke izidingo zomkhawulokudonsa ongemuva weswishi kusendlalelo sokufinyelela yilezi: (24*100M*2+) 1000*2*2 )/1000=8.8Gbps umkhawulokudonsa wendiza engemuva.
Umbandela 3: Izinga lokudlulisela iphakethe: Izinga lokudlulisela iphakethe lembobo engu-1000M ngu-1.488Mpps/s, bese izinga lokushintsha leswishi kusendlalelo sokufinyelela lithi: (24*100M/1000M+2)*1.488=6.55Mpps.
Ngokwemibandela engenhla, lapho amakhamera angu-20 720P exhunywe kuswishi, iswishi kufanele okungenani ibe nembobo yokulayisha engu-1000M eyodwa nezimbobo zokufinyelela ezingaphezu kuka-20 100M ukuze kuhlangatshezwane nezidingo.
2. Ukukhethwa kwamaswishi esendlalelo sokuhlanganisa
Uma isamba sokushintsha okungu-5 kuxhunyiwe, iswishi ngayinye inamakhamera angu-20, futhi ukusakaza kwekhodi kungu-4M, khona-ke ithrafikhi yesendlalelo sokuhlanganisa ithi: 4Mbps*20*5=400Mbps, bese imbobo yokulayisha yesendlalelo sokuhlanganisa kufanele ibe ngenhla. 1000M.
Uma ama-IPC angu-5 exhunywe kuswishi, ngokuvamile ukushintsha kwembobo engu-8 kuyadingeka, bese lokhu
Ingabe iswishi yembobo engu-8 iyahlangabezana nezimfuneko?Kungabonakala ezicini ezintathu ezilandelayo:
Umkhawulokudonsa wendiza engemuva: inombolo yezimbobo*isivinini sembobo*2=umkhawulokudonsa ongemuva, okungukuthi 8*100*2=1.6Gbps.
Izinga lokushintshana kwephakethe: inani lamachweba*isivinini sembobo/1000*1.488Mpps=isilinganiso sokushintshana kwephakethe, okungukuthi, 8*100/1000*1.488=1.20Mpps.
Izinga lokushintsha kwephakethe lamanye amaswishi ngezinye izikhathi libalwa njengokungakwazi ukuhlangabezana nale mfuneko, ngakho-ke liwukushintsha okungeyona isivinini socingo, okulula ukubangela ukubambezeleka lapho uphatha amanani amakhulu.
I-Cascade port bandwidth: I-IPC stream * quantity = ubuncane bomkhawulokudonsa bembobo yokulayisha, okungukuthi 4.*5=20Mbps.Ngokuvamile, lapho umkhawulokudonsa we-IPC udlula u-45Mbps, kuyanconywa ukuthi usebenzise imbobo ye-cascade engu-1000M.
3. Indlela yokukhetha iswishi
Isibonelo, kunenethiwekhi yekhampasi enamakhamera anencazelo ephezulu engaphezu kuka-500 kanye nokusakaza kwekhodi kwamamegabhayithi angu-3 kuya kwangu-4.Isakhiwo senethiwekhi sihlukaniswe ngesendlalelo sokuhlanganisa isendlalelo somgogodla wokufinyelela.Igcinwe kungqimba yokuhlanganisa, isendlalelo ngasinye sokuhlanganisa sihambisana namakhamera angu-170.
Izinkinga ezibhekene nazo: indlela yokukhetha imikhiqizo, umehluko phakathi kwe-100M ne-1000M, yiziphi izizathu ezithinta ukudluliswa kwezithombe kunethiwekhi, futhi yiziphi izici ezihlobene nokushintsha...
1. I-Backplane bandwidth
Izikhathi ezingu-2 zesamba somthamo wazo zonke izimbobo x inombolo yezimbobo kufanele ibe ngaphansi komkhawulokudonsa wendiza yangemuva, okuvumela ukushintsha kwesivinini sentambo okungavimbeli okuphindwe kabili, okufakazela ukuthi iswishi inezimo zokukhulisa ukusebenza kokushintsha idatha.
Isibonelo: iswishi engahlinzeka ngezimbobo ze-Gigabit ezingafika ku-48, umthamo wayo ogcwele wokumisa kufanele ufinyelele ku-48 × 1G × 2 = 96Gbps, ukuze kuqinisekiswe ukuthi uma zonke izimbobo ziku-duplex egcwele, ingahlinzeka ngokushintsha kwephakethe lejubane lentambo elingavimbeli. .
2. Izinga lokudlulisela iphakethe
Izinga lokudlulisela iphakethe lokucushwa eligcwele (Mbps) = inombolo yezimbobo ze-GE ezimiswe ngokugcwele × 1.488Mpps + inombolo yezimbobo ezilungiselelwe ngokugcwele ezingu-100M × 0.1488Mpps, kanye nokuphuma kwethiyori kwembobo eyodwa yegigabhithi lapho ubude bephakethe bungu-6488 bytes ingu-1.4.
Isibonelo, uma iswishi ingahlinzeka ngezimbobo zegigabit ezingafika kwezi-24 futhi izinga lokudlulisela iphakethe elifunwayo lingaphansi kuka-35.71 Mpps (24 x 1.488Mpps = 35.71), khona-ke kunengqondo ukucabanga ukuthi iswishi yakhelwe ngendwangu evimbelayo.
Ngokuvamile, ukushintsha okunomkhawulokudonsa ongemuva owanele kanye nezinga lokudlulisela iphakethe liwushintsho olufanele.
Iswishi enendiza yangemuva enkulu uma kuqhathaniswa kanye ne-throughput encane uma kuqhathaniswa, ngaphezu kokugcina ikhono lokuthuthukisa nokwandisa, inezinkinga ngokusebenza kahle kwesofthiwe/umklamo wesekethe ye-chip ozinikele;iswishi enendiza yangemuva encane uma kuqhathaniswa kanye nokuphumayo okukhulu kunokusebenza okuphelele uma kuqhathaniswa.
Ukusakazwa kwekhodi yekhamera kuthinta ukucaca, okuvamise ukuba ukuhlelwa kokusakaza kwekhodi kokudluliswa kwevidiyo (okuhlanganisa namakhono okubhala ngekhodi nawokukhipha amakhodi okokusebenza kokuthumela nokwamukela, njll.), okuwukusebenza kwekhamera engaphambili futhi enomsebenzi wokufaka ikhodi. lutho nenethiwekhi.
Ngokuvamile abasebenzisi bacabanga ukuthi ukucaca akuphakeme, futhi umqondo wokuthi kubangelwa inethiwekhi empeleni kuwukungaqondi.
Ngokwesimo esingenhla, bala:
Ukusakaza: 4Mbps
Ukufinyelela: 24*4=96Mbps<1000Mbps<4435.2Mbps
Ukuhlanganisa: 170*4=680Mbps<1000Mbps<4435.2Mbps
3. Iswishi yokufinyelela
Ukucatshangelwa okuyinhloko umkhawulokudonsa wesixhumanisi phakathi kokufinyelela nokuhlanganisa, okungukuthi, umthamo we-uplink weswishi udinga ukuba mkhulu kunenombolo yamakhamera angahlaliswa ngesikhathi esifanayo * izinga lekhodi.Ngale ndlela, ayikho inkinga ngokurekhoda kwevidiyo ngesikhathi sangempela, kodwa uma umsebenzisi ebuka ividiyo ngesikhathi sangempela, lo mkhawulokudonsa udinga ukucatshangelwa.Umkhawulokudonsa osetshenziswa umsebenzisi ngamunye ukubuka ividiyo ngu-4M.Uma umuntu oyedwa ebukele, umkhawulokudonsa wenani lamakhamera * bit rate * (1+N) liyadingeka, okungukuthi, 24*4*(1+1)=128M.
4. Iswishi yokuhlanganisa
Isendlalelo sokuhlanganisa sidinga ukucubungula ukusakaza okungu-3-4M (170*4M=680M) kwamakhamera angu-170 ngesikhathi esifanayo, okusho ukuthi iswishi yesendlalelo sokuhlanganisa sidinga ukusekela ukudluliselwa phambili ngesikhathi esisodwa kokungaphezu kuka-680M womthamo wokushintsha.Ngokuvamile, isitoreji sixhunywe ekuhlanganisweni, ngakho-ke ukuqoshwa kwevidiyo kudluliselwa ngesivinini socingo.Kodwa-ke, uma kucatshangelwa umkhawulokudonsa wokubuka nokuqapha kwesikhathi sangempela, uxhumano ngalunye luthatha i-4M, futhi isixhumanisi se-1000M singasekela amakhamera angu-250 ukuze asuswe iphutha futhi abizwe.Ukushintsha kokufinyelela ngakunye kuxhunywe kumakhamera angu-24, 250/24, okusho ukuthi inethiwekhi ingakwazi ukumelana nokucindezela kwabasebenzisi abangu-10 ababuka ikhamera ngayinye ngesikhathi sangempela ngesikhathi esifanayo.
5. I-Core switch
Iswishi eyinhloko idinga ukucabangela amandla okushintsha kanye nomkhawulokudonsa wesixhumanisi ekuhlanganisweni.Ngenxa yokuthi isitoreji sibekwe kungqimba lokuhlanganisa, ukushintshwa okuyinhloko akunayo ingcindezi yokuqoshwa kwevidiyo, okungukuthi, kudinga kuphela ukucabangela ukuthi bangaki abantu ababuka ukuthi bangaki iziteshi zevidiyo ngesikhathi esisodwa.
Uma sicabanga ukuthi kuleli cala, kukhona abantu abangu-10 abaqapha ngesikhathi esisodwa, umuntu ngamunye ubuka iziteshi ze-16 zevidiyo, okungukuthi, umthamo wokushintshanisa udinga ukuba mkhulu
10*16*4=640M.
6. Shintsha ukugxila kokukhetha
Lapho ukhetha amaswishi okuqapha kwevidiyo kunethiwekhi yendawo, ukukhethwa kwesendlalelo sokufinyelela kanye nokushintsha kwesendlalelo sokuhlanganisa ngokuvamile kudinga kuphela ukucabangela isici sokushintsha umthamo, ngoba abasebenzisi ngokuvamile baxhuma futhi bathole ividiyo ngokushintsha okuyinhloko.Ngaphezu kwalokho, njengoba ingcindezi eyinhloko isezishintsheni kungqimba lokuhlanganisa, akulona nje umthwalo wemfanelo wokuqapha ithrafikhi egciniwe, kodwa futhi nokucindezela kokubuka nokuqapha ucingo ngesikhathi sangempela, ngakho-ke kubaluleke kakhulu ukukhetha ukuhlanganisa okufanele. amaswishi.
Isikhathi sokuthumela: Mar-17-2022