Introduction to the MAP Interfaces in PS
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lBetween the serving GPRS support node (SGSN) and a home location register (HLR), the Gr interface mainly completes user location updates and user data management. lBetween the SGSN and an SHLR, the Gd interface mainly completes users short message (SM) receiving and sending flows. lBetween the SGSN and an equipment identity register (EIR), the Gf interface mainly checks the international mobile equipment identities (IMEIs) of users. lBetween the SGSN and a gateway mobile location center (GMLC), the Lg interface mainly provides the location services (LCS). |
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