wcdma handover
TRANSCRIPT
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WCDMA
Handover Management
IN
S.K. GAUR
DE (GSM & 3G)
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2
Points to be discussed
1. Explain the purpose and function of intra-frequency handovers, Inter-Radio-
Access Technoloies !inter-RAT" handovers and Inter-RAT #ell #hane
$. %istinuish bet&een soft, softer and hard handover
'. Explain &hy soft handover is necessary in a (#%)A syste*
+. Explain Inter-RAT handover
. Explain Inter-RAT #ell #hane
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3
!"ES #$ HAND#%ERS
Inter ' Rado Ae** e+no,og- Handover
Inter ' $re/en- Handover
Intra ' $re/en- Handover
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0
!"ES #$ HAND#%ERS
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1
$/nton #verve
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WCDMA Handover (So4ter Handover)
ode-
Inter ' $re/en- Handover
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WCDMA Handover (So4t Handover)
ode-1
R#
ode-$
Inter ' $re/en- Handover
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"R#CESS #$ HAND#%ER
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Reeved "oer Wt+o/t So4t Handover
ti*e
Trouble zone: Prior to Hard Handover,
the UE causes excessive interference to BS2
BS2 Receive Power Target
/E respondin to 01
po&er control bits
/E respondin to 0$
po&er control bits
ti*e
BS1 Receive Power Target
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So4t Handover Dver*t- Gan n t+e U:,n;
SRNC CNGood
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So4t Handover Dver*t- Gan n t+eDon,n;
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0' Ne R>
3' Add8' C"ICH
SRNC
2' Re:ort
"rn:,e* o4 Addng a Ne Ce,, to t+e
Atve Set? .e. So4t Handover
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Sgna,ng $,o W+en C+angng t+e Atve Set
R#R# /E/E
"er4orm
Mea*/rement
"er4orm
Mea*/rement
RNC Eva,/atonRNC Eva,/aton
UE Eva,/atonUE Eva,/aton
Rado >n; AddtonRado >n; Addton
MEASUREMEN C#NR#> me**age
(DCCH)
MEASUREMEN RE"#R me**age
(DCCH)
Rado >n;
Add@Remove@Re:,ae
Rado >n;
Add@Remove@Re:,ae
Rado >n; Remova,Rado >n; Remova,
RNC Eva,/atonRNC Eva,/atonMEASUREMEN C#NR#> me**age
(DCCH)
ACI%E SE U"DAE
(DCCH)
ACI%E SE
U"DAE C#M">EE
Ee/ton
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+e MEASUREMEN C#NR#> Me**age
#ontent %escription
)easure*ent type Intra'4re/en-? Inter'4re/en- or Inter'RA
)easure*ent identity
nu*ber
A re4erene n/m
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HAND#%ER E%ENS
8a ' o Add a ne Ce,, to t+e Atve Set
8< ' o De,ete a ne Ce,, 4rom t+e Atve Set
8 ' o Re:,ae a Ce,, n t+e Atve Set
8d ' o C+ange t+e
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+e =a** 4or Event 8a
)easure*ent Para*eters Involved in Event 1a
)ne&' +e mea*/rement re*/,t o4 t+e e,, enterng t+e re:ortng range
)i' Mea*/rement re*/,t o4 a e,, n t+e Atve Set
A' N/m
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+e =a** 4or Event 8