I-CDMA, ejongene neCandelo leeNkcukacha zoLwazi lokuFikelela kwiNkcazo , iyinkqubo yekhnoloji yeenkonzo ze-cell phone ekhuphisanayo kwi- GSM , umgangatho osetyenziswayo kwi- cell phone .
Mhlawumbi uye wakuva ngalezi ziqendu xa uxelelwa ukuba awukwazi ukusebenzisa ifowuni kwintanethi yakho yeselula kuba usebenzisa ubuchwepheshe obuhlukeneyo obungahambelani. Umzekelo, unokuba nefowuni ye-AT & T engasetyenziswanga kwinethiwekhi yeVerizon kwesi sizathu.
Umgangatho we-CDMA owenziwe yiQualcomm e-US kwaye ngokuyinhloko kusetyenziswa kwi-US kunye neengxenye ze-Asia ngabanye abathwali.
Ziziphi iiNethiwekhi eziyiCDMA?
Kwezona zixhobo ezininzi ezithandwa kakhulu, nantsi ukuphazamiseka kwe-CDMA ne-GSM:
CDMA:
- Sprint
- Verizon Wireless
- Intombi yeselula
GSM:
- T-Mobile
- AT & T
Ulwazi olungakumbi kwi-CDMA
I-CDMA isebenzisa "ubuchule bokusabalalisa" apho i-electromagnetic energy isasazeka ukuvumela isignali ngokubanzi. Oku kuvumela abantu abaninzi kwiifowuni ezininzi ukuba babe "multiplexed" phezu kwekharityhulam elifanayo ukwabelana ngokukhawuleza kwamanqanaba.
Ngekhompyutheni ye-CDMA, idatha kunye neepakethe zezwi zihlukaniswe ngokusebenzisa iikhowudi kwaye zithunyelwa ngokusetyenziswa kwebala elibanzi. Ekubeni isithuba esithile sisoloko sinikwe idatha kunye neCDMA, lo mgangatho waba mnandi kwi-intanethi ye-intanethi ye- 3G ephezulu.
CDMA vs GSM
Uninzi lwabasebenzisi mhlawumbi aludingeki ukuba bakhathazeke malunga nesekhnolokhi yefowuni abayikhethayo ngokweteknoloji engcono. Nangona kunjalo, kukho iimeko ezahlukeneyo eziza kubonakala apha.
Umyinge
Ngelixa i-CDMA ne-GSM bekhuphisana ngentloko ngokukhawuleza kwinqanaba le-bandwidth, i-GSM ine-coverage epheleleyo yehlabathi jikelele ngenxa yokuzulazula kunye nezivumelwano zokuzulazula zamazwe ngamazwe.
I-teknoloji ye-GSM ilindele ukufihla imimandla yasemaphandleni e-US ngakumbi ngokupheleleyo kwi-CDMA. Ngethuba lexesha, i-CDMA yaphumelela kwiTDMA ( iTrans Division Multiple Access ) iteknoloji, eyabandakanywa kwi-GSM ephezulu.
Ukuhambelana kweDivaysi kunye neeSadi zeSIM
Kulula kakhulu ukutshintshisa ii-fowuni kwinethiwekhi ye-GSM kunye neCDMA. Kungenxa yokuba iifowuni ze-GSM zisebenzisa i-SIM ekhutshweyo yamakhadi ukugcina ulwazi malunga nomsebenzisi kwi-network ye-GSM, ngelixa iifowuni ze-CDMA zingenzi. Kunoko, iinqununu ze-CDMA zisebenzisa ulwazi kumgca wecandelo lomncedisi ukuqinisekisa uhlobo olufanayo lweedatha zefowuni ze-GSM zigcinwe kwiSIM khadi zazo.
Oku kuthetha ukuba i-SIM amakhadi kwi-GSM amanethiwekhi ayatshintshana. Ngokomzekelo, ukuba ungowomnatha we-AT & T, ngoko ke unayo ikhadi le-AT & T kwifowuni yakho, ungayisusa kwaye uyibeke kwifowuni ye-GSM eyahlukeneyo, njengefowuni ye-T, ukuhambisa yonke imininingwane yakho yokubhalisa ngaphezulu , kubandakanywa nenombolo yakho yefowuni.
Oko oku kwenziwa ngempumelelo kukuvumela ukuba usebenzise i-T-Mobile kwifowuni ye-AT & T.
Ukutshintshwa okunjalo kulula kakhulu akunakwenzeka kunye neefowuni ezininzi zeCDMA, nokuba ngaba zinamaSIM akhutshwayo. Endaweni yoko, ufuna kakhulu imvume yakho yokuphatha ukuba wenze utshintsho olunjalo.
Ekubeni i-GSM ne-CDMA azihambelani kunye, awukwazi ukusebenzisa ifowuni yeSprint kwi-T-Mobile inethiwekhi, okanye i-Verizon Wireless ifowuni nge-AT & T. Kuyafana nawuphi na umxube wefowuni kunye nomqhubi onokuyenza kwi-CDMA kunye ne-GSM uluhlu oluvela phezulu.
Iphulo: Ii-CDMA zefowuni ezisebenzisa ii-SIM khadi zenza njalo nokuba i-LTE standard iyayifuna okanye ngokuba ifowuni ineSlot slot ukwamukela amanethiwekhi e-GSM angaphandle. Kodwa abo bathuthayo, basebenzisa i-teknoloji ye-CDMA ukugcina ulwazi lombhalisi.
Ukusetyenziswa kwezwi kunye nokusetyenziswa kwedatha
Uninzi lwamaxwebhu e-CDMA aluvumeli ukuhanjiswa kwezwi kunye nedatha ngexesha elifanayo. Yingakho unokubhobhozwa nge-imeyile nakwezinye izaziso ze-intanethi xa ugqiba umnxeba ukusuka kwinethiwekhi ye-CDMA njengeVerizon. Idata ngokukodwa ikhefu ngelixa ufowuni.
Nangona kunjalo, uya kuphawula ukuba imeko enjalo isebenza kakuhle xa ufownele ngaphakathi kwinqanaba lenethiwekhi ye-wifi kuba i-wifi, ngentcazo, ayisebenzisi inethiwekhi yomthutha.