2949775390
2 System introduction
Objectives
After this chapter the student will:
• be able to describe the different nodes in a GSM network.
• be able to describe geographical subdivision of a GSM network.
• be able to describe the most common identity numbers.
• be able to describe some basie traffic cases.
2.2 Nodes and functions..........................................................................2
Mobile Station (MS)..................................................................................2
Base Station System..................................................................................3
Switching System.......................................................................................3
Operation and Maintenance Centre (OMC).............................................4
GSM PLMN(Public Land Mobile Network)..............................................5
MSC/VLR(Service Area)...........................................................................5
Location area............................................................................................6
Celi............................................................................................................6
Mobile Station ISDN Number (MSISDN).................................................6
International Mobile Subscriber Identity (IMSI)......................................6
Temporary Mobile Subscriber Identity (TMSI).........................................7
International Mobile Eąuipment Identity (IMEI)......................................7
2.5 SlMPLIFIED TRAFFIC CASES.....................................................................7
Cali from a Mobile Station........................................................................7
Cali to a Mobile Station............................................................................8
Location Updating....................................................................................9
Michael Quek
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