Data Roaming vs Cellular Data
Cellular cov ntaub ntawv yog lub peev xwm los siv cov ntaub ntawv kev pabcuam ntawm cov xovtooj ntawm tes, thaum Cov Ntaub Ntawv roaming yog lub peev xwm los siv cov kev pabcuam no thaum roaming sab nraum thaj chaw thaj chaw ntawm cov chaw muab kev pabcuam. Cov ntaub ntawv roaming yog nyob ntawm qhov kev pom zoo ntawm cov chaw muab kev pabcuam thiab GRX (GPRS Roaming Txauv) hubs uas ua rau muaj ntau yam nyuaj, nrog rau, kev cog lus.
Data Roaming
Data Roaming yog lub peev xwm ntawm cov neeg siv khoom siv cov ntaub ntawv kev pabcuam sab nraud ntawm lub tsev network ntawm tus muab kev pabcuam. Nyob rau hauv cov ntaub ntawv roaming, cov neeg siv tuaj yeem txuas mus rau txawv teb chaws cov chaw muab kev pabcuam mobile network yog tias tsis muaj kev pabcuam hauv tsev thiab siv cov ntaub ntawv pabcuam. Kev siv cov neeg muab kev pabcuam txawv teb chaws lub network nyob ntawm qhov kev pom zoo ntawm cov chaw muab kev pabcuam txawb. Piv txwv li, cov ntaub ntawv roaming yog qhov uas tus neeg siv hauv Australia tuaj yeem mus rau Askiv thiab siv tib SIM (Subscriber Identification Module) uas tau siv hauv lub tebchaws los nkag mus rau cov ntaub ntawv kev pabcuam thaum nyob hauv tebchaws Askiv. Cov neeg siv tuaj yeem nkag mus rau cov ntaub ntawv roaming kev pabcuam siv cov khoom siv sib txawv xws li xov tooj ntawm tes, laptops (ntawm modems), ntsiav tshuaj thiab lwm yam, uas txhawb kev siv SIM. Hauv cov ntaub ntawv roaming, raws li kev pom zoo ntawm cov chaw muab kev pabcuam, SGSNs (Kev Pabcuam GPRS Kev Pabcuam Node) tau muab rau xa mus rau txawv tebchaws IMSI (International Mobile Subscriber Identity) qhov chaw hloov tshiab thov rau GRX. GRX cov chaw muab kev pab nrhiav lub tsev network ntawm IMSI thiab xa mus rau lub tsev HLR (Tsev Chaw Sau Npe) thiab xa rov qab cov lus teb nrog cov neeg siv nkag mus rau qhov profile rau txawv teb chaws HLR. Tom qab ua tiav qhov chaw hloov tshiab, cov neeg siv tuaj yeem siv cov ntaub ntawv roaming hauv lub network txawv teb chaws. Cov ntaub ntawv kev khiav tsheb ntawm cov neeg siv roaming raug xa ncaj qha mus rau SGSN hauv tsev ntawm SGSN txawv teb chaws raws li 3GPP architecture los ntawm qhov chaw lawv txuas rau hauv internet.
Cellular Data
Cellular cov ntaub ntawv yog lub peev xwm ntawm cov xov tooj ntawm tes los pab txhawb cov ntaub ntawv kev pabcuam rau cov neeg siv kawg. Lub tswv yim ntawm cov ntaub ntawv xov tooj ntawm tes tau ua qauv nrog kev pib ntawm GSM. Vim hais tias, raws li tus qauv GSM lub peev xwm los muab cov ntaub ntawv xov tooj ntawm tes yog qhov tseem ceeb uas yuav tsum tau poob rau hauv cov kev pabcuam. GSM bearer cov kev pabcuam muaj peev xwm thauj cov ntaub ntawv synchronous lossis asynchronous nrog kev hloov pauv lossis pob ntawv hloov cov ntaub ntawv tus nqi ntawm 300 txog 9600bps. Tam sim no cov xov tooj ntawm tes txhawb nqa mus txog ntau pua Mbps cov ntaub ntawv nrawm nrog 4G thev naus laus zis vim qhov kev thov loj rau cov ntaub ntawv ntawm cov khoom siv txawb. Yuav luag tag nrho cov tshiab mobile pab kiag li lawm tau optimized siv cov ntaub ntawv kev pab cuam ntawm tes hauj lwm. Kev hloov pauv ntawm cov xov tooj ntawm tes (xws li 4G) qhia tau hais tias pib lub suab hloov pauv lub suab kuj tau hloov mus rau hauv pob ntawv hloov suab cov kev pabcuam, uas ua rau muaj kev ua haujlwm yooj yim ntawm cov xov tooj ntawm tes los muab cov ntaub ntawv xov tooj ntawm tes rau cov neeg siv kawg.
Dab tsi yog qhov txawv ntawm Cov Ntaub Ntawv Roaming thiab Cov Ntaub Ntawv Cellular?
Kev siv cov ntaub ntawv xov tooj ntawm tes tau nrov zuj zus vim muaj qhov nrawm nrawm thiab vim muaj kev txav mus los. Tag nrho cov tshiab 3GPP architectures tau hloov zuj zus los ua kom tau raws li qhov xav tau ntawm kev lag luam no, thaum pab txhawb cov ntaub ntawv roaming qhov twg cov neeg siv tuaj yeem siv cov ntaub ntawv kev pabcuam sab nraud hauv tsev. Tam sim no cov ntaub ntawv xov tooj ntawm tes yog ib yam khoom tseem ceeb rau cov neeg siv txawm tias lawv muaj kev pabcuam hauv tsev lossis tsis yog. Qhov no yog qhov chaw cov ntaub ntawv roaming tuaj rau hauv kev ua si. Tam sim no cov ntaub ntawv roaming tsub nqi tseem ceeb heev thaum piv nrog cov ntaub ntawv xov tooj ntawm tes hauv lub tebchaws vim tias muaj kev nyuaj ntawm kev sib koom ua ke ntawm cov tes hauj lwm, thiab vim muaj teeb meem kev cog lus. Txij li thaum cov ntaub ntawv xov tooj ntawm tes tau nrov zuj zus hauv ntiaj teb, cov phiaj xwm them nyiaj kuj dhau los ua nyuaj. Tsis zoo li hauv 2G thiab 3G thaum ntxov, cov ntaub ntawv xov tooj ntawm tes them raws li cov txheej txheem kev pabcuam tau dhau los ua qhov tseem ceeb tam sim no siv cov yam ntxwv zoo li Kev Tshawb Fawb Txog Pob Zeb Sib Nrauj (DPI). Qhov nyuaj no tsis muaj nrog Data Roaming tsub vim qhov tsawg kawg nkaus muaj koob meej thaum piv nrog cov ntaub ntawv xov tooj ntawm tes.
Hauv kev nkag siab dav dav, cov ntaub ntawv roaming yog ib qho ntawm cov ntaub ntawv xov tooj ntawm tes, uas yog ib qho tseem ceeb raws li lub neej tam sim no ntawm tib neeg thoob plaws ntiaj teb. Cov thev naus laus zis tshiab tam sim no tau hloov zuj zus los ua kom muaj cov ntaub ntawv ntau dua rau cov neeg siv kawg, qhov twg cov ntaub ntawv xov tooj ntawm tes tau dhau los ua cov lag luam tseem ceeb rau cov chaw muab kev pabcuam txawb.
