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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What is Home Location Register (HLR)? – Definition from Techopedia

Why hexagon not circle or Pentagon or square? What are the functions defined in MS Excel but not listed in function’s guide? The equipment identity register is often integrated to the HLR. Home Dictionary Tags Data Management. What is the difference between mobile communication and mobile computing?

GSM – The Network Switching Subsystem (NSS)

Retrieved from ” https: The authentication center AuC is a function to authenticate each SIM card that attempts to connect to the gsm core network typically when the phone is powered on. Views Read Edit View history. There are various different names for MSCs in different contexts which reflects their complex role conputing the network, all of these terms though could refer to the same MSC, but doing different things at different times.

Proper implementation of security in and around the AuC is a key part of an operator’s strategy to avoid SIM cloning. Later, if the mobile kobile makes a call, clmputing VLR will have the information needed for call setup without having to interrogate the HLR each time. By Mohamed Abaker Ezeldin at Oct Development of A3 and A8 algorithms is considered a matter for individual GSM network operators, although example implementations are available.


The billing center is responsible for processing the toll tickets generated by the VLRs and HLRs and generating a bill for each subscriber. If the authentication fails, then no services are possible from that particular combination of SIM card and mobile phone operator attempted. Follow Aand Report Question Comments 0. This is designed to allow tracking of stolen mobile phones.

GSM – The Network Switching Subsystem (NSS)

The owner has blocked you Answer should contain a minimum of 25 characters. What are the key po Why do they decide that the coverage area cell in GSM network has a hexagon shape?

The term is only valid in the context of one call, since any MSC may provide both the gateway function and the visited MSC function. The HLR wnd a system which directly receives and processes MAP transactions and messages from elements in the GSM mobille, for example, the location update messages received as mobile phones roam around. Some EIR also have the capability to log Handset attempts and store it in a log file.

The AuC does not engage directly in the authentication process, but instead generates data known as triplets for the MSC to use during the procedure. You can’t add content on Bayt. Other information stored in the HLR includes services requested by or rendered to the corresponding subscriber, the general packet radio service settings of the subscriber, the current location of the subscriber and call compyting settings. While A and B are talking with each other, C can join the call and listen silently.

An encryption key is also generated that is subsequently used to encrypt all wireless communications voice, SMS, etc. A home location register HLR is a database containing pertinent data regarding subscribers authorized to use a global system for mobile communications GSM network. The Human Element of Digital Transformation: The multimedia messaging service center supports the sending of multimedia messages e.


What is HLR and VLR and its function in GSM?

There is an additional form of identification check performed on the serial number of the mobile phone described in the EIR section below, but this is not relevant to the AuC processing. Do you need help in adding the right keywords to your CV? March Learn how and when to remove this template message.

Systems Monitoring for Dummies: The original shape of any cell is circle, but these circles when arranged in a way the coverage boundarie The VLR database will therefore contain some duplicate data as well as more precise data relevant to the subscriber remaining within the VLR coverage here coverage means status of customer of last lac location area code updation.

Upvote 1 Downvote Reply 0 Report. Because cell phones, and their respective SIMs, are mostly mobile, the HLR serves as the main source of recent location information. It was extended with an overlay architecture to provide packet-switched data services known as the GPRS core network. It is also responsible for generating billing data of roaming subscriber.

It also performs such functions as toll ticketing, network interfacing, common mkbile signaling, and others. Therefore, a new set of security methods was designed for 3G phones.