General Packet Radio Service (GPRS) ndi luso lamakono lomwe limapanga GSM (mawonekedwe onse a mafoni) makina a mawu ndi chithandizo cha ma data. Maofesi a GPRS amawatcha ma intaneti 2.5G ndipo amachotsedwa pang'onopang'ono kuti atsatire ma installations atsopano a 3G / 4G.
Mbiri ya GPRS
GPRS inali imodzi mwa matekinoloje oyambirira omwe anathandiza kuti maselo a selo agwirizane ndi intaneti (Internet Protocol) (IP) , kukwaniritsa kufalitsidwa kwa ana ambiri kumayambiriro kwa zaka za 2000 (nthawi zina kutchedwa "GSM-IP"). Kukwanitsa kufufuza Webusaiti kuchokera pa foni nthawi iliyonse ("nthawizonse pa" kutumizirana deta), pamene kumatengedwa mopepuka m'mayiko ambiri lerolino, inali yatsopano tsopano. Ngakhale lero, GPRS ikupitirizabe kugwiritsidwa ntchito m'madera ena padziko lapansi kumene kwakhala kosavuta kwambiri kukonzanso njira zatsopano zamagetsi zamakono ndi njira zatsopano.
Othandizira a pa intaneti a pa intaneti anapereka ma DTMS ma data pamodzi ndi mapepala olembetsa mauthenga pamaso pa mateknoloji a 3G ndi 4G adatchuka. Ambiri amalipiritsa ntchito ya GPRS molingana ndi kuchuluka kwa bandwidth omwe amagwiritsa ntchito potumiza ndi kulandira deta mpaka opereka atasintha kuti apereke mapepala ogwiritsira ntchito apamwamba monga mwambo lero.
Mapulogalamu a EDGE (Mapulogalamu Owonjezeka a Dongosolo la GSM Evolution) (omwe nthawi zambiri amatchedwa 2.75G) adapangidwa kumayambiriro kwa zaka za 2000 za GPRS. ZOKHUDZA nthawi zina zimatchedwanso Kulimbitsa GPRS kapena EGPRS yokha.
Teknoloji ya GPRS inali yofanana ndi European Telecommunications Standard Institute (ETSI). GPRS ndi EDGE deployments zonse zimayang'aniridwa moyang'aniridwa ndi 3rd Generation Partnership Project (3GPP).
Makhalidwe a GPRS
GPRS ikugwiritsa ntchito paketi yosinthasintha kwa deta. Ikugwira ntchito pang'onopang'ono mofulumira ndi miyezo ya lero - miyeso ya deta ya zojambulidwa imachokera pa 28 Kbps kufika 171 Kbps, pang'onopang'ono kuperekera kuchepa. (Mosiyana, ma EDGE amawunikira maulendo 384 Kbps atayambitsidwa, kenako amakula mpaka 1 Mbps .)
Zina zomwe zimathandizidwa ndi GPRS ndizo:
- Utumiki wafupipafupi (SMS) - ndondomeko yapadera yolumikizana yolumikizira mauthenga
- Multimedia Messaging Service (MMS) - zowonjezeredwa ku SMS kuti athe kupititsa mavidiyo kuphatikiza pa malemba
- Wopanda Mauthenga Opanda Mauthenga (WAP) - njira yapadera yolankhulirana yoyendetsera mafoni, tsopano yatha
Kutumizira GPRS kwa makasitomala akufunika kuwonjezera mitundu iwiri ya hardware ku ma GSM omwe alipo:
- GPRS GothS Support Code (GGSN) imagwirizanitsa maselo ogwiritsira ntchito othandizira pa intaneti (kapena intaneti ina). Zida zimenezi zimayendetsa magalimoto pakati pa intaneti ndi kunja.
- Gervic Support Gode (SGSN) ikukhazikika pakati pa makina opatsirana ndi othandizira makasitomala (makamaka magalimoto). Zida zimenezi zimatsimikizira komanso kuyendetsa mafoni omwe amalembedwa pa intaneti (kuphatikizapo kugwiritsa ntchito ntchito).
GPRS Tunneling Protocol (GTP) imathandizira kusamutsidwa kwa deta ya GPRS kudzera mu chitukuko cha Networks cha GSM. GTP imayendera kwambiri Datagram Protocol (UDP) .
Kugwiritsa ntchito GPRS
Kuti agwiritse ntchito GPRS, munthu ayenera kukhala ndi foni ndikulembetsa ku ndondomeko ya deta komwe wothandizira amachirikiza.