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Definition of Call Drop

Type of Call Drop Definition

• Call termination not through the normal hang up process, that is dropped calls.

• Tow types of call drop definition:

o Definition of drive test indicators

o Definition of network management indicators

Definition of Drive Test Indicators

• The definition of drive test:

o Call drop rate= Numer of call drop times!Numer of call setup success

times

o Numer of call setup success times"#:$fter the $lerting message is

received

• Numer of call drop times"#:%$ir interface signaling at the &' side(

o The Connect $C) message is not received ut the *ystem Informationmessage is received.

o  $fter the Connect $C) message is received, ++C +elease message

received and the reasons is Not Normal.

o  $fter the Connect $C) message is received, any of the CC Disconnect,

CC +elease, CC +elease Complete message received and the reasons isNot Normal.

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&' oluntarily Initiated *ignaling +elease

Definitions of Network -anagement Indicators

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Definitions of Network -anagement Indicators

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Reasons of Call Drop

Call Drop +easons

•

oor Coverage

• &n/configured Neighor Cell

• 0andover

• Interference

• *C Confliction

• 'ngineering 'rror 

oor Coverage