Table of Contents
What is difference between HLR and VLR?
In general, HLR contains information about all subscribers within a network, while VLR contains more dynamic information relevant to subscribers roaming within the VLR area. HLR acts as a fixed reference point for a particular mobile station (subscriber), while its VLR can vary depending on mobility and network design.
What is stored in VLR?
The VLR is a functional unit that stores subscriber information, such as location area, when the subscriber is located in the area covered by the VLR.
How many VLR serve a base station at a time?
one VLR
Visitor location register (VLR) Each main base transceiver station in the network is served by exactly one VLR (one BTS may be served by many MSCs in case of MSC in pool), hence a subscriber cannot be present in more than one VLR at a time.
What is the role of HLR VLR and EIR in a GSM network?
Visitor Location Register (VLR) The VLR is always integrated with the MSC. Later, if the mobile station makes a call, the VLR will have the information needed for call setup without having to interrogate the HLR each time.
Which stores Mobile Subscriber ISDN number Msisdn?
(Mobile Subscriber ISDN) The telephone number of a GSM cellphone. The MSISDN is stored in the SIM card inside the phone.
Why is VLR important?
The VLR database helps reduce the number of queries sent to the home location register (HLR) which contains the permanent records of mobile subscribers. A VLR database contains fields similar to the HLR. The information stored in the VLR is gotten from the HLR or collected by the MSC.
What is the use of VLR in the cellular networks?
A visitor location register (VLR) is a server in a cellular network that supports roaming functions for users outside the coverage area of their own HLR.
What is MSC and Lai number?
A Location Area Identity (LAI) is a globally unique number. A Location Area Code (LAC) is only unique in a particular network. MSC to the new MSC. Using this IMSI, the new MSC requests the subscriber data from the HLR and then updates the VLR and HLR after successful authentication.
What does barred MSISDN mean?
MSISDN is barred. The end user should contact their network operator, to either remove the restrictions in place. The MSISDN may be blacklisted or not permit certain SMS based transactions.