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MOBILE MAXIMUM RANGĘ

Timing advance X bit period X velocity

Rangę =

Rangę =Di stance between Mobile to MS

Timing advance =Delay of Bits (0-63)

Bit period =577/156.25 = 3.693 psecs

= 3.693 X 10e-6

Yelocity = 3X 10e5

RANGĘ=

RANGĘ = 34.9 Kms.

(63) X (3.693 X 10e-6) X (3 X 10e5) 2

LOCATION UPDATE

The process of mobile informing the MSC about its current Location area is Location update.

There exist three different causes for the MS to start the Location Updating Procedurę.

There are,

1)    Types of normal location update.

2)    IMSI Attach.

3)    Periodic Location update.

Types of normal Location update:

•    Mobile tums on power

•    Reads the new LAI

•    If different, does a location update.

IMSI Attach:

•    Mobile turns off and sends an IMSI detach to MSC

•    Mobile turns on again and compares LAI

•    If same, sends an IMSI Attach to MSC.