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Happy learning...

GSM Core Network: Network Management Subsystem

So after BSS and NMS, its turn of Network Management Subsystem (NMS).

The purpose of the NMS is to monitor various functions and elements of the network. The functions of the NMS can be divided into three categories: Fault management, configuration management and performance management

These functions cover the whole of the GSM network elements from the level of individual BTSs, up to MSCs and HLRs.

Network Management Subsystem (NMS) includes various entities and the purpose of the NMS is to monitor various functions and elements of the network. These functions can be divided into 3 categories:
Fault Management
Configuration Management
Performance management

All the above mentioned functions cover the whole of the GSM network elements from BTSs to MSCs. Lets have a look at all the functions one by one:

Fault Management: The purpose of fault management is to ensure the smooth operation of the network and quick correction of any sort of problem. It also provides the information on the current status of alarm events and maintains a history database of alarms.
Configuration Management:
The function of configuration management is to maintain the information about the operation and configuration status of all the network elements.
Performance management: In performance management, the NMS collects data from individual network elements and stores it in a database. This data helps the operator to evaluate the actual performance of the network and to spot the good and bad performance areas as well.

Below are the different entities of this subsystem:
Operation and Support System (OSS)
OSS monitors every aspect of a cellular system. It monitors several carrier's systems and do a variety of operation and maintenance works such as software upgrade, collecting network performance statistics, reconfiguring network elements frequency planning etc
Every OMC is staffed twenty four hours a day.
Mobile Intelligent Service Node
All the advanced intelligent network services are managed by mobile intelligent services node (MISN)
Message Center (MXE)
The MXE handles short message service, cell broadcast or cell info messages, voice mails, e-mails, fax and other kind of notifications


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