I-General Packet Radio Service (GPRS) ubugcisa obuqhelekileyo obwandisa i-GSM (inkqubo yehlabathi yeselula) amanethiwekhi omnxeba kunye nenkxaso yempawu zedatha. Amanethiwekhi asekelwe kwi-GPRS ahlala ebizwa ngokuba ngamanethiwekhi e- 2.5G kwaye ngokukhawuleza aphakanyiswa ukulungiselela ukufakwa kwintsha ye-3G / 4G.
Imbali yeGPRS
I-GPRS ingenye yezobuchwepheshe bokuqala ezenza inethiwekhi yeselube idibanise neNethwekhi ye-Intanethi ye-Intanethi (IP) , ekufezekiseni ukuthotyelwa kwamanye amazwe kuma-2000s (okokuqala kuthiwa yi "GSM-IP"). Ikhono lokukhangela iWeb kwi fowuni nanini ("rhoqo" kwi-networking data), ngelixa lithathwa ngokungenanto kwiindawo ezininzi zehlabathi namhlanje, yayiselungileyo ngoko. Ngamhla, i-GPRS iyaqhubeka isetyenziselwa kwiindawo zehlabathi apho kuye kwaba kubi kakhulu ukuphucula iziseko zesevisi zesekhaneli zeselula kwiindlela ezintsha ezintsha.
Abanikezeli be-intanethi bafumana iiNkonzo ze-GPRS kunye neepakethe zokubhaliselwa ngezwi phambi kobuchwepheshe be- 3G no-4G baba yintando. Abathengi bokuqala bahlawulela inkonzo ye-GPRS ngokungqinelana nendlela amaninzi omthamo wenethiwekhi abasebenzisa ngayo ukuthumela nokufumana idatha kude kube ngabanikezeli banikezela ukuba banikezele iipakethi zokusetyenziswa kwamanani asezantsi njengesiko namhlanje.
I-EDGE (Ixabiso loLwazi loPhuculo lwe-GSM Evolution) (oludla ngokuba ngu-2.75G) lwakhiwe ekuqaleni kwe-2000 ye-GPRS. I-EDGE ngamanye amaxesha ibizwa ngokuba yi-GPRS ephuculweyo okanye i-EGPRS nje.
I-GPRS iteknoloji yayimiselwe yi-European Telecommunications Standard Institute (ETSI). I-GPRS kunye ne-EDGE deployments zombini zilawulwa phantsi kolawulo lweProjekthi yokuBambisana yoBu-3 (3GPP).
Iimpawu zeGPRS
I-GPRS isebenzisa ipakethi yokutshintshwa kwedatha. Isebenza ngokukhawuleza ngokukhawuleza ngokwemilinganiselo yanamhlanje - amaxabiso eenkcukacha zokulandwa zivela kwi-28 Kbps ukuya kwi-171 Kbps, ngokukhawuleza ukulayishwa kwezantsi. (Ngokwahlukileyo, ama-EDGE axhaswa ngamazinga angama-384 Kbps xa athe waziswa kuqala, kamva aphakanyiselwe ukuya kwi-1 Mbps .)
Ezinye izinto ezixhaswe yi-GPRS ziquka:
- Inkonzo Yomfutshane emfutshane (i-SMS) - iiprogram zokunxibelelana ezizodwa ezilungiselelwe ukuthumela imiyalezo
- I-Multimedia Service Messaging (MMS) - izandiso kwiSMS ukuvumela ukuhanjiswa kwamavidiyo ngaphezu kokubhaliweyo
- IProsoft Application Protocol (WAP)
Ukuhambisa i-GPRS kumakhasimende kufuneka kudibaniswe iintlobo ezimbini zezinto eziphathekayo kwii-GSM amanethiwekhi:
- I-Gateway ye-GPRS Inkxaso yeNode (GGSN) idibanisa inethiwekhi yesevisi yomncedisi kwi-intanethi (okanye enye inethiwekhi ye-IP). Ezi zixhobo zilawula ithrafikhi phakathi kwee-intanethi zangaphakathi nangaphandle.
- Ukukhonza iNkqubo yeNkxaso ye-GPRS (SGSN) ihlala phakathi kwenethiwekhi yangaphakathi yomboneleli wesevisi kunye nezixhobo ezijongene nabathengi (ngokukodwa iziseko zesiseko). Ezi zixhobo ziqinisekisa kwaye zilawula iifowuni ezisayinwe kwinethiwekhi (kubandakanywa ukubeka esweni).
Iprotocol ye-GPRS Tunneling Protocol (GTP) isekela ukudluliswa kwedatha ye-GPRS kwiziseko ze-GSM zenethiwekhi. I-GTP ephambili isebenza kwiProtocol yeDatagram Protocol (UDP) .
Ukusebenzisa i-GPRS
Ukusebenzisa i-GPRS, umntu kufuneka abe neselfowuni aze abhalisele kwisicwangciso se data apho umniki-nkonzo exhasa khona.