3G Analysis Summary

8/10/2019 3G Analysis Summary

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3G Analysis Summary

Defnitions

Pilot pollution:The presence of more than a pilot with level

dierence within 5-8 dB causing low Ec/No all of

them are strong but no one is strong enough to be

dominant regarding that they are of the same

freuency

Missing Neighbor:The presence of a detected neighbor with high

!"#$ for a period without adding to the %" causing

degradation in Ec/No&t may cause pilot pollution as this high neighbor

neither added to %" nor it is low enough to be

neglected 'from the point of view of interference()

Overshooting&t is a case li*e missing neighbor but the dierence

is that in case of overshooting the mentioned

neighbor is far from the detection position while in

case of missing neighbor the neighbor is near the

detection position)


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Dropped calls

ause !ays to discover "ecommendation

$ilot pollution

+inding %", N . N

with relatively near

!"#$ levels 'within 5-

8dB( all of them are

high

own tilt the

antennas of the

surrounding sites to

decrease the

interference caused

by them to have

dominant cells

0ow !"#$The !"#$ level is too

low'less than -12(

causing low Ec/No

%dd a site in thisarea to improve the

coverageissing

neighbor

+inding a high N but

chec* the cell 3le to

ma*e sure that it is

near the detection

position)

&t can be noticed from

4#% missing

neighbor window but

ma*e sure that it is a

real problem as TE"

report missing

neighbor after a

certain time while this

neighbor may be

added to %" after a

longer time than that

of the TE")

&n 4#% missing

neighbor window we

can notice

%dd this neighbor to

%"


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priorities 6

7stpriority where the

missing neighbor

must be added as the

3rst member in %"and has higher !"#$

and Ec/No than the

strongest %" member)

ndpriority where it

has lower or eual

!"#$ than strongest

%" member)

vershooting

+inding a high N butchec* the cell 3le to

ma*e sure that it is far

from the detection

position) #hec* the

cells by cell &)

own tilt the

antenna to %"

T problemNoticing a mobile

disconnectionNo need to solve

90

interference

&t can be found from

"ystem information

message "&B :

&t can be noticed also

by monitoring the

layer ; messages and

detecting that 0

messages are

successive without 90

messages for a while

%lso we notice that 9E

T< power increases

gradually until it

reaches its ma


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distance between the

9E and Node B and

ma*e sure that the

increasing power is

not due to thedistance)

The !"#$ is a sign to

determine the

distance between 9E

and Node B)

9nidirectional

missing

neighbor

Noticing the T

direction, if the call

dropped in onedirection and

continued in the other

as a result that a

neighbor is de3ned in

a direction and

missing 'N in the

problem direction with

high !"#$( in theother)

e3ne this neighbor

as bidirectional

neighbor)

4rong

parameters

&t can be noticed by

3nding strange %"

updates

#hec* the

parameters of soft

=

TE"

problem

Noticing bloc*ed or

dropped call on the

map without 3nding it

in layer ; messages

No need to solve

0

&nterference

There is no 0 layer ;

messages sent and

noticing successive 90

messages)

The Ec/No is very low

although the !"#$ is

#hec* tra>c

performance on this

cell)

#hec* soft =

parameters)

#hec* &nter-!%T =


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ause!ays to discover

"ecommendatio

n&nterference Noticing 0

successive

#ontinue to

observe this area


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messages without

90 reply or vice

versa)

#ongestion

$resence of call

attempt retries)Notice the call

scenario for the

bloc*ing if the

mobile camped on

this cell in another

time with a good

uality and

performance thenthis cell maybe

congested)

%d?ust soft

handoverparameters to

decrease "= on

this cell)

#hec* the ;@

phase in the

nearest sites in

this area)

%dd a micro in thisarea to handle

tra>c there)

Not !+ problem

$resence of re?ect

or noticing a

failure in any

reuest from !N#

to #N)

#ontinue to

observe %-

interface


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3G Analysis Summary

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