WIRELESS NETWORKS AND MOBILE IP
WIRELESS NETWORKS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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HLR
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VLR
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EIR
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AuC
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Detailed explanation-1: -1) What is the name of the database that stores subscriber information under an MSC and his eligible services? Explanation: HLR also stores the location of a customer.
Detailed explanation-2: -In current cellular systems, the network is divided into service areas, each composed of a number of cells managed by a central unit, called Mobile Switching Center (MSC). Each MSC has two databases, called Home Location Register (HLR) and Visitor Location Register (VLR).
Detailed explanation-3: -The HLR contains information regarding users who are registered as subscribers in the area, whereas the VLR contains information regarding users who are registered as subscribers somewhere else but happen to be roaming in the area.
Detailed explanation-4: -Home Location Register (HLR): 1) This database contains all the administrative information about each subscriber along with their last known location. 2) In this way the GSM network is able to route calls to the relevant base station for the MS.