HLR vs VLR
Home Location Register (HLR) and Visitors Location Register (VLR) is databases that contain the mobile subscriber information as per GSM architecture. Feem ntau muaj ib lub hauv paus HLR rau ib tus neeg siv xov tooj ntawm tes thiab ib VLR rau txhua qhov Kev Pabcuam Hloov Chaw Hloov Chaw (MSC) tab sis qhov no tuaj yeem sib txawv raws li qhov sib txawv ntawm cov neeg muag khoom siv. Lub peev xwm ntawm HLR thiab VLR tuaj yeem cuam tshuam ncaj qha rau cov neeg siv khoom muaj peev xwm ntawm tus neeg siv xov tooj ntawm tes.
HLR
HLR muaj cov ntawv nkag rau txhua tus thiab txhua tus neeg siv (MSISDN Number) hauv ib lub xov tooj ntawm tes. Feem ntau HLR muaj cov ntaub ntawv zoo li qub thiab ruaj khov ntawm tus neeg siv khoom. Rau qhov piv txwv ntawm cov neeg siv khoom, kev pabcuam kev pabcuam (Suab, Cov Ntaub Ntawv, SMS thiab lwm yam), cov kev pabcuam ntxiv, kev tso cai thiab lwm yam tshaj li cov ntaub ntawv zoo li no, nws muaj cov ntaub ntawv ib ntus xws li tus lej VLR tam sim no thiab tus lej MSC. HLR ua haujlwm raws li qhov chaw nruab nrab rau kev hu xov tooj hauv cov neeg siv xov tooj ntawm tes. Feem ntau ntawm kev tswj hwm kev ua ub no hais txog cov neeg siv khoom yog tswj hwm thiab ua haujlwm nyob ib puag ncig HLR. Nyob rau hauv feem ntau tus neeg muag khoom siv qhov chaw Authentication (lwm yam hauv GSM architecture) yog kev koom ua ke rau HLR los muab kev tsim qauv mobile network zoo dua. Hauv qhov no HLR muaj cov ntaub ntawv pov thawj zoo ib yam.
VLR
VLR yog cov ntaub ntawv khaws cia uas muaj ib feem ntawm cov ntaub ntawv muaj nyob hauv HLR thiab lwm cov ntaub ntawv dynamic hais txog cov chaw nres tsheb txawb 'tam sim no roaming hauv thaj chaw tswj hwm ntawm VLR cuam tshuam. Cov ntaub ntawv hauv VLR yog qhov muaj zog dua li lwm qhov vim tias muaj kev txav mus los ntawm cov chaw nres tsheb mobile. Thaum lub chaw nres tsheb txawb txav los ntawm ib cheeb tsam mus rau lwm qhov lawv cov ntaub ntawv tau hloov kho hauv VLR, txhawm rau nrhiav cov chaw nres tsheb txawb. Thaum tus neeg siv yuav tsiv tawm mus rau thaj tsam VLR tshiab ces HLR qhia rau VLR qub kom tshem tawm cov ntaub ntawv ntsig txog tus neeg muab khoom. Interface ntawm HLR thiab VLR yog hu ua D-Interface raws li tus qauv GSM uas pab qhia cov ntaub ntawv ntawm cov nodes. Cov ntaub ntawv hais txog qhov chaw xws li LAI (Qhov Chaw Qhia Txog Qhov Chaw), cov xwm txheej txuas ntxiv thiab Cov Neeg Siv Khoom Siv Sijhawm Sijhawm Sijhawm Teev Npe (TMSI) tau muab khaws cia rau hauv VLR. Tsis tas li ntawd qee cov ntaub ntawv pov thawj tau dhau los ntawm HLR rau VLR rau qhov yuav tsum tau ua pov thawj.
Qhov txawv ntawm HLR thiab VLR yog dab tsi?
HLR thiab VLR muaj lawv tus kheej ua haujlwm hauv GSM architecture. Kuj tseem muaj kev sib txuas lus ntawm HLR thiab VLR raws li GSM architecture. Tus naj npawb ntawm kev sib txuas lus muaj nyob rau hauv HLR thiab VLR nodes los qhia lawv cov ntaub ntawv. Piv txwv li thaum ib tus neeg siv khoom txav los ntawm ib cheeb tsam VLR mus rau lwm thaj chaw lawv qhov chaw tau hloov kho hauv VLR thiab cov ntaub ntawv VLR tshiab tau hloov kho hauv HLR. Tab sis yog tias tus neeg siv khoom txav mus rau hauv tib cheeb tsam VLR tsis xav tau kev cuam tshuam nrog HLR.
Ob leeg HLR thiab VLR khaws cov ntaub ntawv cov neeg siv khoom raws li GSM architecture los muab kev pabcuam kev sib txuas lus rau cov neeg siv npe hauv lub network. Feem ntau HLR muaj cov ntaub ntawv hais txog txhua tus neeg siv khoom hauv lub network thaum VLR muaj cov ntaub ntawv muaj txiaj ntsig zoo rau cov neeg siv khoom nyob hauv cheeb tsam VLR. Qhov no tuaj yeem sib txawv nyob ntawm tus qauv tsim network vim tias feem ntau HLRs 'ua raws li lub hauv paus ntawm cov nodes thaum VLRs feem ntau yog qhov sib txawv ntawm thaj chaw. HLR ua raws li qhov taw qhia ruaj khov rau lub chaw nres tsheb txawb (tus neeg siv npe) thaum nws VLR tuaj yeem sib txawv nyob ntawm kev txav mus los thiab kev tsim network.
Txawm tias ob qho tib si HLR thiab VLR ua raws li cov ntaub ntawv hauv tib lub xov tooj ntawm tes, hauv feem ntau cov qauv VLRs tau raug txwv thaj chaw thaj chaw los tswj tag nrho cov ntaub ntawv dynamic txog cov neeg siv khoom nyob rau hauv cheeb tsam ntawd thaum HLR ua raws li lub hauv paus tseem ceeb uas muab ntau dua. cov ntaub ntawv zoo li qub hais txog cov neeg siv khoom hauv txhua lub network. HLR ua haujlwm rau kev tswj hwm cov neeg siv khoom hauv lub network thaum VLR txhawb nqa kev txav mus los thiab lwm yam ntaub ntawv dynamic txog cov neeg siv khoom.
