Hello, everyone!
Today, I will continue on the topic of GSM in wireless communications.
Assume there are three mobile stations attached to the tower, and the tower is connected to the BTS through TRX, then to the BSC and MSC. Let's take a look at how different components work.
1. MS :
MS is the abbreviation for Mobile Station. MS refers to the hardware and software that users require to communicate with a mobile network. Mobile Station (MS) = Subscriber Identity Module + Mobile Equipment (ME) (SIM). These mobile stations are now connected to a tower, which is connected to the BTS via TRX. TRX stands for transmitter and receiver in a transceiver. Transceivers can send and receive data in two ways.
2. BTS :
The BTS (Base Transceiver Station) is a wireless communication device that connects user equipment to a network. Every tower has a BTS system.
3. BSC :
BSC is the abbreviation for Base Station Controller. BSC has a number of BTS. You can think of the BSC as a local exchange in your area with many towers, each of which has BTS.
4. MSC :
MSC is the abbreviation for Mobile Switching Center. Communication switching operations such as call establishment, call release, and routing are all related with MSC. At the MSC level, call tracing, call forwarding, and other services are performed. VLR, HLR, AUC, EIR, and PSTN are some of the other components of MSC.
VLR : It is the abbreviation for Visitor Location Register. VLR is a database that contains the actual location of all mobile customers in MSC's service area at any given time. When you go from one state to another, your entry is recorded in the VLR database.
HLR : The abbreviation HLR stands for Home Location Register. HLR is a database that contains information on subscribers who are authorized to utilize a GSM network. If you buy a SIM card from a vendor in the HLR. HLR is similar to a house in that it stores all of your information, such as your ID evidence, the plan you're on, the caller tune you're using, and so on.
OMC : It is an acronym for Operation Maintenance Center. The performance of each MS, BSC, and MSC within a GSM system is monitored and maintained by OMC.
AUC : The Authentication Center is abbreviated as AUC. AUC verifies the identity of a mobile subscriber who wishes to connect to the network.
EIR : It is the abbreviation for Equipment Identity Register. EIR is a database that maintains track of who is authorized and who is not in the network. If you've been banned from the network, you won't be able to use it or make calls.
PSTN : PSTN is an acronym for Public Switched Telephone Network. The PSTN is linked to the MSC. PSTN was originally a network of analog telephone networks with fixed lines. Its primary network is now almost totally digital, and it covers mobile and other networks, as well as fixed telephones. PSTN is the same as the old landline phones that we used to have at home.
BSS, NSS, and OSS are three subsystems that are coupled via interfaces. There are three interfaces in total:
Air Interface : UM interface is another name for air interface. Because it is a mobile analog to the U interface of ISDN, the interface between MS and BTS is known as the UM interface.
Abis Interface : It's an internal BSS interface that connects to BTS and BSC.
A interface : It allows BSS and MSC to communicate with one another.
As a result, the architecture and functionalities of GSM components are complete.
You are welcome to like and exchange in the comment area. Stay safe and Thank you!
