Ubuchwepheshe be-2.5G yesikhashana buqalise uhlelo olusebenzayo lwe-packet-switching
Esimweni samafoni, ubuchwepheshe obungenawaya be-2.5G beyinto eyayihamba phambili eyenza ubuchwepheshe obungenazintambo ( 2ndG generation generation generation) ( 3G ) nobuchwepheshe obungenazintambo. Nakuba i-2G ne-3G ichazwa ngokusemthethweni njengamazinga angenantambo, i-2.5G ayikho. Yenzelwe izinjongo zokumaketha.
Njengoba isinyathelo esincane esivela ku-2G kuya ku-3G, 2.5G wabona ezinye zezinhlelo ezihamba phambili ezinamanethiwekhi we-3G kufaka phakathi izinhlelo zokupakisha. Ukuziphendukela kwemvelo kusuka ku-2G kuya ku-3G kuholele ekutheni ukudluliswa kwedatha kwamandla okusheshayo nangaphezulu.
Ukuguquka kwe-2.5G Technology
Ngama-1980, amakholi asetshenziselwa ubuchwepheshe be-analog 1G. Ubuchwepheshe be-Digital 2G buqala ukutholakala ekuqaleni kwawo-1990s ohlelweni lomhlaba jikelele lwezinga eliphezulu lokuxhumana (GSM). Ubuchwepheshe bukhona ngesikhathi sokuhlukanisa ukufinyelela okuningi (TDMA) noma ukuhlukaniswa kwekhodi ikhodi yokufinyelela amaningi (CDMA). Nakuba ubuchwepheshe be-2G buxhaswe ubuchwepheshe bamuva, kusekhona emhlabeni jikelele.
Ubuchwepheshe be-2.5G yesikhashana bufaka isu lokupakisha kwepakethe eliphumelela kakhulu kunalesi sandulela. Ingqalasizinda yayo ingasetshenziswa ngesisekelo esidingekayo kunokuba isetshenziswe ngomzuzu owodwa, okwenze kube ngempumelelo ngaphezu kobuchwepheshe be-2G. Ubuchwepheshe be-2.5 bulandelwa ngu-2.75G, okuyizintathu zobuchwephesha, kanye nobuchwepheshe be-3G ngasekupheleni kwawo-1990. Ekugcineni, i-4G ne-5G ilandelwe.
2.5G no-GPRS
Igama elithi 2.5G ngezinye izikhathi lisetshenziselwa ukubhekisela ku-General Packet Radio Service ( GPRS ), okuyizinga elingenasidingo lwedatha elisetshenziselwa amanethiwekhi weGMM futhi kwaba yisinyathelo sokuqala ekuziphendukeni kobuchwepheshe be-3G. Amanethiwekhi we-GPRS ekugcineni agxilile kumazinga weDatha okuThuthukisiwe we-GSM Evolution ( EDGE ), okuyinto eyinhloko yekhono lobuchwepheshe be-2.75G, enye intuthuko eyengeziwe engesiyo insimu engenantambo.