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Other cellular components actively working with the HLR include the gateway mobile switching center (G-MSC), visitor location register (VLR) and the. The HLR interacts with the Mobile Switching Center (MSC), which is a switch used for The third integral element is the Visiting Location Register (VLR), which. The HLR connects to the following elements: The G-MSC for handling incoming calls; The VLR for handling requests from mobile phones to attach to the.

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If the authentication fails, then no services are possible from that particular combination of SIM card and mobile phone operator attempted. Why do they decide that the coverage area cell in GSM network has a hexagon shape? The original shape of any cell is circle, but these circles when arranged in compuing way the coverage boundarie What is the difference between cloud computing and mobile computing?

The HLR is a database used for storage and computinng of subscriptions.

GSM – The Network Switching Subsystem (NSS)

There are various different names for MSCs in different contexts which reflects their complex role in the network, all of these terms though could refer to the same MSC, but doing different things at different times.

It is used to authenticate the customer and generate a key for encrypting voice and data traffic, as defined in 3GPP TS The AUC protects network operators from different types of fraud found in today’s cellular world. It also performs such functions as toll ticketing, network interfacing, common channel signaling, and others.

Development of A3 and A8 algorithms is considered a matter for individual GSM network operators, although example implementations are available. By Mohamed Abaker Ezeldin at Oct You can’t add content on Bayt. Planning a Complete Security Strategy: The Human Element of Digital Transformation: What is the generation of each of the following mobile communication system: Generally, lawful Interception implementation is similar to the implementation of conference call.


It is owned and deployed by mobile phone operators and allows mobile devices to communicate with each other and telephones in the wider public switched telephone network PSTN. Question already answered Please make sure that your answer is written in the same language as the question.

The MSC performs the switching of calls between the mobile and other fixed or mobile network users, as well as the management of mobile services such as registration, authentication, location updating, handovers, and call routing to a roaming subscriber.

Other information stored in the HLR includes services requested by or rendered com;uting the corresponding subscriber, the general packet radio service settings of the subscriber, the current location of the subscriber and call divert settings. It is also responsible for generating billing data of roaming subscriber.

The home location register HLR is a central database that contains details of each mobile phone subscriber that is authorized to use the GSM core network. Upvote 1 Downvote Reply 0 Report. Systems Monitoring for Dummies: An IMEI is marked as invalid if it has been reported stolen or is not type approved.

The billing center is responsible for processing the toll tickets generated by the VLRs and HLRs and generating a bill for each subscriber.

Mobile switching centre server.

The TMSI will be updated frequently, this makes it very difficult for the call to be traced and therefore provides a high degree of security for the subscriber. Because cell phones, and their respective SIMs, are mostly mobile, compkting HLR serves as the main source of recent location information.


The term Circuit switching CS used here originates from traditional telecommunications systems. Anx is basically Home location Register is a database used for permanent storage of customer information.

What is HLR and VLR and its function in GSM? – Specialties

Before the SMS company forwards the message to the intended recipient, it scans through the HLR to find which mobile switching center MSC the recipient has recently used. The term is only valid in the context of one call, since any MSC may provide both the moile function and the visited MSC function.

moble The voicemail system records and stores voicemail. While A and B are talking with each other, C can join the call and listen silently. This is designed to allow tracking of stolen mobile phones. Compliance is Not Enough: The AuC does not engage directly in the authentication process, but instead generates data known as triplets for the MSC to ylr during the procedure. Unfortunately, the answer movile are trying to submit has already been added.

Therefore, a new set of security methods was designed for 3G phones. Actually HLR Having all the detail like customer ID, customer number, billing detail and for prepaid with IN intelligent network its has detail of current recharge of prepaid user so far its is very complex but i just make it in simple word for you.

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