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WCDMA Direct Retry Decision Algorithm and Parameters(DRD)
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Objectives
Upon completion o this co!rse" yo! #ill be able to$ %no# the principle o DRD %no# the classes o DRD Describe ho# DRD #or&s
%no# the relative parameters o DRD
Page
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Contents
1.Overvie# o DRD
2. RR DRD
3.RA' onPeriodic DRD
4. RA' Periodic DRD
Page!
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Principle o DRD
DRD algorithm is !sed to select a s!itable cell or a U* to access" by this algorithm" the system capacity is ma+imi,ed" a
nd better services are provided
Page"
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Classiication o DRD
Dierent types o DRD can be adopted d!ring dierent phases o service processing
Page#
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Classiication o DRD Cell
-nterre.!ency neighboring cells
Page$
Inter-RAT neighboring cells
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Contents
1.Overvie# o DRD
2. RR DRD
3.RA' onPeriodic DRD
4. RA' Periodic DRD
Page&
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Overvie# o RRC DRD
RRC DRD is perormed #hen a U* ails to access the c!rrent cell d!ring RRC connection set!p0 /he p!rpose is to enabl
e the U* to set !p an RRC connection in a s!itable interre
.!ency neighboring cell
Page10
RRC Connection Setup
RAB Processing
RRC DRD
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/riggering Condition o RRC DRD
1cenario2 $ /he RRC connection set!p ails in the cell that the U* tried to access
1cenario3 $ /he cell that the U* is trying to access does not
s!pport signaling radio bearer (1R') over 41PA #hen it is selected as the bearer scheme
Page11
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Proced!re o RRC DRD
1tep 2 $ /he RC selects same coverage intraband interre.!ency neighboring cells o the c!rrent cell that are s!itabl
e or blind handovers
1tep 3 $ /he RC generates a list o interre.!ency candidate cells that s!pport DRD according to the ollo#ing conditi
on $
(CP-C45*co) RAC4 6 DRD5*cO nbcell
Page12
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Proced!re o RRC DRD(Cont00)
1tep 7 $ /he RC selects a target cell rom the candidate cells or U* access0 - the candidate cell list is empty" the RRC
DRD ails0 /he RC perorms RRC redirection0 - the candid
ate cell list contains more than one cell" the U* tries a cell r
andomly
Page1
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1ignaling 8lo# o RRC DRD
Page1!
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Parameters o RRC DRD
Dr1#itch
Parameter ame $ Direct Retry 1#itch Recommended val!e $
DR5RRC5DRD51W-/C4$O" DR5RA'51-95DRD51W-/C4$O" DR5RA'5COM'5DRD51W-/C4$O88
Page1"
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Parameters o RRC DRD(Cont00)
'l ind4o8lag
Parameter ame $ 'lind 4andover 8lag Recommended val!e $ 8A:1*
DRD*c(;/hreshhold
Parameter ame $ Drd *c
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Contents
1.Overvie# o DRD
2. RR DRD
3.RA' onPeriodic DRD
4. RA' Periodic DRD
Page1$
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Contents
70 RA' onPeriodic DRD
702 onPeriodic DRD Overvie#
703 'lindhandoverbased onPeriodic DRD
707 Meas!rementbased onPeriodic DRD
Page1%
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Overvie# o onPeriodic DRD
onperiodic DRD is !sed to select a s!itable cell or U* access in the ollo#ing RA' phase $ RA' set!p RA' modiication
DCCC channel reconig!ration
onperiodic DRD can be perormed based on $ 'lind handover Meas!rement(M'DR)
Page1&
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Contents
703 'lindhandoverbased onPeriodic DRD
70302 Overvie#
70303 -nter8re.!ency DRD
70307 -nterRA/ DRD
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Overvie# o 'lind4andover'ased onPeriodic DRD
'lindhandoverbased nonperiodic DRD consists o $ interre.!ency DRD interRA/ DRD
When M'DR is disabled" the ollo#ing parameters determi
ne #hether to enable blindhandoverbased nonperiodic D
RD$ 8or a single service" is the DR5RA'51-95DRD51W-/C4 s!b par
ameter o the Dr1#itch parameter
8or combined services" is the DR5RA'5COM'5DRD51W-/C4 s!b parameter o the Dr1#itch parameter
Page21
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8lo# o 'lind4andover'ased onPeriodic DRD
Page22
RAB SetupRequest
Inter-frequency DRD
Admission
Service Request Accept
Any Inter-
freq DRDcandidate
cell?
Inter-RAT
DRD
OterIAC
ProcessSuccess
YES
Success
Fail
Fail
No
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Contents
70303 -nter8re.!ency DRD
7030302 -nter8re.!ency DRD Overvie#
7030303 -nter8re.!ency DRD or Device /ype 1teering
7030307 -nter8re.!ency DRD or /echnological 1atisaction
703030> -nter8re.!ency DRD or 1ervice 1teering
703030? -nter8re.!ency DRD or :oad 'alancing
Page2!
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Algorithms o -nter8re.!ency DRD
/he RC perorms these DRDs in se.!ence" as sho#n in th
e above 8ig!re
Page2"
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Proced!re o -nter8re.!ency DRD
Page2#
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1ignaling o -nter8re.!ency DRD
Page2%
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Contents
70303 -nter8re.!ency DRD
7030302 -nter8re.!ency DRD Overvie#
7030303 -nter8re.!ency DRD or Device /ype 1teering
7030307 -nter8re.!ency DRD or /echnological 1atisaction
703030> -nter8re.!ency DRD or 1ervice 1teering
703030? -nter8re.!ency DRD or :oad 'alancing
Page2&
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Contents
7030303 -nter8re.!ency DRD or Device /ype 1teering
703030302 /he Overvie# o -ntelligent -nter arrier :ayered
Management on U*s and Data ards 8eat!re
703030303 /he Process o DRD or Device /ype 1teering
703030307 /he Parameters o DRD or Device /ype 1teering
Page0
O i - t lli t - t C i : d
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Overvie# o -ntelligent -nterCarrier :ayeredManagement on U*s and Data Cards 8eat!re
Page1
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Process o DRD or Device /ype 1teering
Page2
D!ring a RA' set!p or a terminal" the RC perorms DRDsbased on the terminal type and the terminal device type pri
ority o cell$
- the s#itch speciied by DP9DRD1#itch is t!rned on" the
RC perorms DRDs based on the terminal type priority andallo#s the terminal to preerentially access a highpriority cell
- the s#itch speciied by DP9DRD1#itch is t!rned o" theRC perorms DRDs based on other interre.!ency DRD al
gorithms0
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Parameters o DRD or Device /ype 1teering
DP9DRD1#itch
Parameter ame $ Device /ype 1teering DRD 1#itch Recommended val!e $ O88
Page
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Contents
70303 -nter8re.!ency DRD
7030302 -nter8re.!ency DRD Overvie#
7030303 -nter8re.!ency DRD or Device /ype 1teering
7030307 -nter8re.!ency DRD or /echnological 1atisaction
703030> -nter8re.!ency DRD or 1ervice 1teering
703030? -nter8re.!ency DRD or :oad 'alancing
Page!
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Contents
7030307 -nter8re.!ency DRD or /echnological 1atisaction
703030702 Overvie#
703030703 Priority 1e.!ence o 41PA@ /echnologies
703030707 Proced!re or DRD or /echnological 1atisaction
Page"
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Principle o DRD or /echnological 1atisaction
Page#
/echnological satisaction reers to determining #hether acandidate cell satisies the technical speciications or certa
in services" s!ch as 41PA@ services
DRD or technological satisaction is !sed to select a s!itabl
e cell and 41PA@ technologies or a U* based on the 41PA@
technologies s!pported by the U* and the attrib!tes o the
re.!ested service" s!ch as the bearer channel" service type"
and service rate
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Processes o DRD or /echnological 1atisaction
Page$
1.Determines the HSPA+technologies that can beconfgured on the !
". Determines the HSPA+technological satis#action o#each candidate cell
$. Selects a suitable cell #or the !based on the %riorit& se'uence o#HSPA+ technologies
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Priority 1e.!ence o 41PA@ /echnologies
Page&
/he technological satisaction o a cell is determined by the41PA@ technologies that can be both conig!red on the U*
and s!pported by the cell0 - these 41PA@ technologies hav
e a high priority" the cell is considered to have a high techn
ological satisaction
/he 41PA@ technologies comprise DC41DPA" enhanced lay
er 3 (:3)" M-MO" >BAM" D/@DR" *DPCC4 'oosting" U: 2
BAM" and 411CC4 :ess Operation
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Priority 1e.!ence 2 o 41PA@ /echnologies
Page!0
When M-MO>BAMorDC41DPA1#itch is set to DC41DPA and M-MOor>BAM1#itch to M-MO " the priority se.!ence
is $
1. DC41DPA@M-MO
". DC41DPA(#ith do#nlin& >BAM activated in at least one cell)
$. M-MO@>BAM
(. DC41DPA (#ith do#nlin& 2BAM activated in at least one cell)
). M-MO@D: 2BAM
*. D: >BAM
. D: enhanced :3
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Priority 1e.!ence 2 o 41PA@ /echnologies (Cont00)
Page!1
When M-MO>BAMorDC41DPA1#itch is set to DC41DPA and M-MOor>BAM1#itch to M-MO " the priority se.!ence
is $
,. *DPCC4 'oosting
. U: 2BAM1. U: enhanced :3
11. D/@DR
1". 411CC4 :ess Operation
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Priority 1e.!ence 3 o 41PA@ /echnologies (Cont00)
Page!
When M-MO>BAMorDC41DPA1#itch is set to DC41DPA and M-MOor>BAM1#itch to >BAM " the priority se.!ence is
$
,. *DPCC4 'oosting
. U: 2BAM1. U: enhanced :3
11. D/@DR
1". 411CC4 :ess Operation
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Priority 1e.!ence 7 o 41PA@ /echnologies
Page!!
When M-MO>BAMorDC41DPA1#itch is set to M-MO5>BAM and M-MOor>BAM1#itch to M-MO " the priority se.!enc
e is $
1. DC41DPA@M-MO
". M-MO@>BAM$. DC41DPA (#ith do#nlin& >BAM activated in at least one cell)
(. M-MO@D: 2BAM
). D: >BAM
*. DC41DPA (#ith do#nlin& 2BAM activated in at least one cell). D: enhanced :3
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Priority 1e.!ence 7 o 41PA@ /echnologies (Cont00)
Page!"
When M-MO>BAMorDC41DPA1#itch is set to M-MO5>BAM and M-MOor>BAM1#itch to M-MO " the priority se.!enc
e is $
,. *DPCC4 'oosting
. U: 2BAM1. U: enhanced :3
11. D/@DR
1". 411CC4 :ess Operation
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Priority 1e.!ence > o 41PA@ /echnologies
Page!#
When M-MO>BAMorDC41DPA1#itch is set to M-MO5>BAM and M-MOor>BAM1#itch to >BAM " the priority se.!en
ce is $
1. DC41DPA@M-MO
". M-MO@>BAM$. DC41DPA (#ith do#nlin& >BAM activated in at least one cell)
(. D: >BAM
). M-MO@D: 2BAM
*. DC41DPA (#ith do#nlin& 2BAM activated in at least one cell). D: enhanced :3
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Priority 1e.!ence > o 41PA@ /echnologies (Cont00)
Page!$
When M-MO>BAMorDC41DPA1#itch is set to M-MO5>BAM and M-MOor>BAM1#itch to >BAM " the priority se.!en
ce is $
,. *DPCC4 'oosting
. U: 2BAM1. U: enhanced :3
11. D/@DR
1". 411CC4 :ess Operation
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Parameters o the Priority o 41PA@ /echnologies
M-MO>BAMorDC41DPA1#itch
Parameter ame $ Preered M-MO5>BAM or DC541DPA character
Recommended val!e $ DC541DPA
M-MOor>BAM1#itch
Parameter ame $ Preered M-MO or >BAM character Recommended val!e $ M-MO
Page!%
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Contents
7030307 -nter8re.!ency DRD or /echnological 1atisaction
703030702 Overvie#
703030703 Priority 1e.!ence o 41PA@ /echnologies
703030707 Proced!re or DRD or /echnological 1atisaction
Page!&
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Proced!re or DRD or /echnological 1atisaction
Page"0
/he Proced!re is same #ith the proced!re o interre.!ency DRD" only the description o step 3 is more detailed $
". /he RC selects a cell #ith the highest technological satisaction as the target cell0 - m!ltiple cells have the highest technological satisaction" the RC selects a s!itable cell based o
n DRD or service steering0 - m!ltiple cells have the highestservice priority" the RC selects a s!itable cell based on DRD or load balancing
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Contents
703030> -nter8re.!ency DRD or 1ervice 1teering
703030>02 Overvie#
703030>03 ell 1ervice Priorities
703030>07 Proced!re o DRD or 1ervice 1teering
703030>0> Parameters o DRD or 1ervice 1teering
Page"2
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/he Overvie# or DRD or 1ervice 1teering
Page"
- the U* re.!ests a service in an area covered by m!ltiplere.!encies" the RC selects the cell #ith the highest servi
ce priority or U* access" based on the RA' service type an
d the service priorities in the cells
/he availability o DRD or service steering is speciied by t
he 1erviceDiDrd1#itch parameter thro!gh MM: comm
and 1*/ UDRD (RC level s#itch) or ADD UC*::DRD (cell le
vel s#itch)
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Contents
703030> -nter8re.!ency DRD or 1ervice 1teering
703030>02 Overvie#
703030>03 ell 1ervice Priorities
703030>07 Proced!re o DRD or 1ervice 1teering
703030>0> Parameters o DRD or 1ervice 1teering
Page"!
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Principle o Cell 1ervice Priorities
Page""
A cell service priority is a servicespeciic priority or a cellamong cells in the same coverage area0 Cell service prioriti
es help achieve traic absorption in a hierarchical #ay
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Conig!ration o Cell 1ervice Priorities
Page"#
R!n the ADD U1P9 command to add a service priority gro!p" #hi
ch is identiied by the parameter 1pg-d
R!n the ADD UC*::1*/UP" MOD UC*::1*/UP" or ADD UC*::BU-C
%1*/UP command to assign the 1P9 identity to the cell
Cell
SPGIdenti
ty
ServicePriorityof R99
RTService
ServicePriorityof R99
NRTService
ServicePriority
ofHSDPAService
ServicePriority
ofHSUPAService
ServicePriorityof oterService
A 1 " 1 1 1 / " 1 "
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*+ample o DRD or service steering
Page"$
When selecting a target cell or RA' processing" the RC selects a
cell #ith a high priority" that is" a cell that has a lo# service priorit
y val!e
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Contents
703030> -nter8re.!ency DRD or 1ervice 1teering
703030>02 Overvie#
703030>03 ell 1ervice Priorities
703030>07 Proced!re o DRD or 1ervice 1teering
703030>0> Parameters o DRD or 1ervice 1teering
Page"%
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Proced!re o DRD or 1ervice 1teering
Page"&
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Contents
703030> -nter8re.!ency DRD or 1ervice 1teering
703030>02 Overvie#
703030>03 ell 1ervice Priorities
703030>07 Proced!re o DRD or 1ervice 1teering
703030>0> Parameters o DRD or 1ervice 1teering
Page#1
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Parameters o DRD or 1ervice 1teering
1erviceDiDrd1#itch
Parameter ame $ 1ervice 1teering DRD 1#itch character Recommended val!e $ O88
1pg-d
Parameter ame $ 1ervice priority gro!p -dentity Recommended val!e $ one
Page#2
Parameters o DRD or 1ervice 1teering (C
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Parameters o DRD or 1ervice 1teering (C ont00)
Page#
P!r!"eter P!r!"eter n!"e Reco""ended v!l#e
PriorityServiceForR99RT
Ser0ice %riorit& o# RRT ser0ice
1
PriorityServiceForR9
9NRT
Ser0ice %riorit& o# R
RT ser0ice
1
PriorityServiceForHSDPA
Ser0ice %riorit& o#HSDPA ser0ice
1
PriorityServiceForHSUPA
Ser0ice %riorit& o#HSPA ser0ice
1
PriorityServiceForExt Rab Ser0ice %riorit& o#2ther ser0ice 1
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Contents
70303 -nter8re.!ency DRD
7030302 -nter8re.!ency DRD Overvie#
7030303 -nter8re.!ency DRD or Device /ype 1teering
7030307 -nter8re.!ency DRD or /echnological 1atisaction
703030> -nter8re.!ency DRD or 1ervice 1teering
703030? -nter8re.!ency DRD or :oad 'alancing
Page#!
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Contents
703030? -nter8re.!ency DRD or :oad 'alancing
703030?02 Overvie#
703030?03 Po#er'ased DRD or :oad 'alancing
703030?07 ode'ased DRD or :oad 'alancing
Page#"
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Principle o DRD or :oad 'alancing
Page##
- the U* re.!ests a service set!p or channel reconig!ration in an area covered by m!ltiple re.!encies" the RC sets
!p the service on a carrier #ith a light load to balance o!t t
he load among the cells on the dierent re.!encies0
-nterre.!ency DRD or load balancing also can be called i
nterre.!ency DRD or load sharing
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/ypes o DRD or :oad 'alancing
Page#$
DRD #or load balancing concerns two resources3
%ower and code 4ode-based DRD #or load balancing is a%%licable to
onl& R ser0ices because HSDPA ser0ices use
reser0ed codes
!oad Balancing
Power-based
DCH
HSDPA
Code-based
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Parameters o DRD or :oad 'alancing
Page#%
P!r!"eter P!r!"eter n!"e Reco""ended v!l#e
LdbDRDSwitchDCH 5oad balance DRDswitch #or D4H
266
LdbDRDSwitchHSDP A
5oad balance DRDswitch #or HSDPA
266
CodeBalancinDrdSwitch
4ode /alancing DRDSwitch
266
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Contents
703030? -nter8re.!ency DRD or :oad 'alancing
703030?02 Overvie#
703030?03 Po#er'ased DRD or :oad 'alancing
8or onD 41DPA 1ervices
8or D 41DPA 1ervices
703030?07 ode'ased DRD or :oad 'alancing
Page#&
Algorithms o Po#er 'ased DRD or :oad
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Algorithms o Po#er'ased DRD or :oad'alancing
Page$0
Algorithm2 $ DRD or load balancing is perormed according to the cell meas!rement val!es or the D: non41DPA po
#er and D: 41D1C4 9'P(Po#er Re.!irement or 9'R)
Algorithm3 $ DRD or load balancing is perormed accordin
g to the DC4 e.!ivalent n!mber o !sers (*U) and 41DPA
!ser n!mber
Algorithm2 Case o Po#er 'ased DRD or
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Algorithm2 Case o Po#er'ased DRD or:oad 'alancing
Page$1
Cell ' has a lighter load o non41DPA po#er than cell A
Cell A has a lighter load o 41D1C4 9'P than cell '
Parameters o Po#er 'ased DRD or :oad
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Parameters o Po#er'ased DRD or :oad'alancing
Page$2
:dbDRDchoice
Parameter ame $ :oad 'alancing DRD Choice Recommended val!e $ User!mber
Proced!re o Po#er 'ased DRD or :oad
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Proced!re o Po#er'ased DRD or :oad'alancing
Page$
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Parameters o Po#er'ased DRD or :oad
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Parameters o Po#er'ased DRD or :oad'alancing
Page$#
P!r!"eter P!r!"eter n!"e Reco""ended v!l#e
DlConvA!RThdD5 threshold o# 4on0 A7Rser0ice
,8
LdbDRDLoadRe#a
inThdDCH
Dl load balance DRD %ower
remain threshold #or D4H$)8
DlCellTotalThd D5 total %ower threshold 8
LdbDRDLoadRe#ainThdHSDPA
Dl load balance DRD %owerremain threshold #orHSDPA
18
DlTotalE$U%erN&#
D5 total e'ui0alent usernumber
,
!axH%d'aU%erN&#
7a9imum HSDPA usernumber
*(
Condition 3 o Po#er'ased DRD or :oad
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Condition 3 o Po#er'ased DRD or :oad'alancing
Page$%
8or algorithm 2 DC4 1ervice$(/hdAMR"nbcell Pnon4"nbcell) (/hdAMR"c!tcell Pnon4"c!tcell) 6 /hdD"loadoset
(/hdtotal"c!tcell Pload"c!tcell) (/hdtotal"nbcell Pload"nbcell) E /hdtotal"loadoset
8or algorithm 2 41DPA 1ervice
(/hd total"nbcell P 9'P"nbcell ) (/hd total"c!tcell P 9'P"c!tcell ) 6 /hd 4"loadoset
(/hd total"c!tcell P load"c!tcell ) (/hd total"nbcell P load"nbcell ) E /hd total"loadoset
Condition 3 o Po#er'ased DRD or :oad
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Condition 3 o Po#er'ased DRD or :oad'alancing(Cont00)
Page$&
8or algorithm 3 DC4 1ervice$(/hdAMR"nbcell F PDen!"nbcell) (/hdAMR"c!tcell F PDen!"c!tcell) 6 /hdD"loadoset
8or algorithm 3 41DPA 1ervice
(/hd4!e"nbcell F P4!e"nbcell) < /hd4!e"nbcell (/hd4!e"c!tcell F P4!e"c!tcell) < /
hd4!e"c!tcell 6 /hd4"loadoset
Parameters o Po#er'ased DRD or :oad
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Parameters o Po#er 'ased DRD or :oad'alancing
Page%0
P!r!"eter P!r!"eter n!"eReco""end
ed v!l#e
LdbDRD()%etDCH5oad balance DRD o:set#or D4H
18
LdbDRD()%etHSDPA 5oad balance DRD o:set#or HSDPA 18
LdbDRDTotalPwrProT hd
5oad balance DRD total%ower %rotect threshold
$8
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Contents
703030? -nter8re.!ency DRD or :oad 'alancing
703030?02 Overvie#
703030?03 Po#er'ased DRD or :oad 'alancing
8or onD 41DPA 1ervices
8or D 41DPA 1ervices
703030?07 ode'ased DRD or :oad 'alancing
Page%2
Po#er'ased DRD or :oad 'alancing
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Po#er 'ased DRD or :oad 'alancing(DC41DPA)
Page%
1tep 2 $ /he D 9ro!p #ill be decided by comparing the D: :o
ad bet#een the D 9ro!ps
1tep 3 $ And the Anchor arrier #ill be selected based on the
U: :oad o the 3 carriers belonging to the D 9ro!p
Parameters o Po#er'ased DRD or :oad
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Parameters o Po#er 'ased DRD or :oad'alancing(DC41DPA)
Page%!
P!r!"eter P!r!"eter n!"e Reco""ended v!l#e
UlLdbDRDSwitchDcHSD
PA
%lin; load balanceDRD Switch #or D4-HSDPA
2
UlLdbDRDLoadRe#ainT hdDcHSDPA
%lin; load balanceDRD remainthreshold #or D4-HSDPA
")8
UlLdbDRD()%etDcHSD
PA
%lin; load balanceDRD 2:set #or D4-
HSDPA
18
C
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Contents
703030? -nter8re.!ency DRD or :oad 'alancing
703030?02 Overvie#
703030?03 Po#er'ased DRD or :oad 'alancing
703030?07 ode'ased DRD or :oad 'alancing
Page%"
C d ' d DRD : d ' l i
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Code'ased DRD or :oad 'alancing
Page%#
Parameters o Code'ased DRD or :oad
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Parameters o Code 'ased DRD or :oad'alancing
Page%$
P!r!"eter P!r!"eter n!"e Reco""ended v!l#e
CodeBalancinDrd!inSFThd
7inimum S6 Threshold #or 4ode/alancing DRD
S6,
CodeBalancinDrdCodeRateThd
4ode 2ccu%anc& Thres #or 4ode/alancing DRD
1$8
DeltaCode(cc&'iedRat e
Delta o# 4ode2ccu%anc&
8
C t t
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Contents
703 'lindhandoverbased onPeriodic DRD
70302 Overvie#
70303 -nter8re.!ency DRD
70307 -nterRA/ DRD
Page%%
- t RA/ DRD
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-nterRA/ DRD
Page%&
P t - t RA/ DRD
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Parameters o -nterRA/ DRD
Page&0
'l ind4OPrio
Parameter ame $ 'lind 4andover Priority Recommended val!e $ one
DRMa+91M(!m
Parameter ame $ Ma+im!m /imes o -nterRA/ Direct Retry Recommended val!e $ 3
C t t
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Contents
70 RA' onPeriodic DRD
702 onPeriodic DRD Overvie#
703 'lindhandoverbased onPeriodic DRD
707 Meas!rementbased onPeriodic DRD
Page&1
C t t
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Contents
707 Meas!rementbased onPeriodic DRD
70702 Overvie#
70703 M'DR Algorithm 1#itches
70707 M'DR Proced!re
Page&2
P i i l M'DR
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Principle o M'DR
Page&
With implementing M'DR(Meas!rementbased nonperiodi
c DRD )" interre.!ency or interRA/ meas!rement is pero
rmed
/he s!ccess rate o interre.!ency or interRA/ DRD can b
e ens!red even i the c!rrent cell and the DRD target cell co
ver dierent areas
M'DR algorithm cannot be !sed #ith blindhandoverbase
d periodic DRD sim!ltaneo!sly
1ignaling o -nter 8re.!ency M'DR
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1ignaling o -nter8re.!ency M'DR
Page&!
Contents
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Contents
707 Meas!rementbased onPeriodic DRD
70702 Overvie#
70703 M'DR Algorithm 1#itches
70707 M'DR Proced!re
Page&"
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Parameters o M'DR Algorithm 1#itches
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Parameters o M'DR Algorithm 1#itches
Page&$
P!r!"eter P!r!"eter n!"e Reco""ended v!l#e
*nterFre$ActiveT y'e
Inter-#re'uenc&7/DR Switch
4SA7R4S2A7RPSRPSHSPA
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Proced!re o -nter 8re.!ency M'DR
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Proced!re o -nter8re.!ency M'DR
Page&&
1tep 2 $ ater an RRC connection set!p" the M'DR algorith
m can trigger the meas!rement o interre.!ency M'DR
1tep 3 $ the RC sends the U* an interre.!ency meas!re
ment control message" instr!cting the U* to meas!re the si
gnal .!ality o the interre.!ency M'DR neighboring cells
1tep 7 $ - the signal .!ality o the interre.!ency M'DR ce
lls meet the re.!irements" the RC prioriti,es these cells a
nd establishes service in the cell #ith the highest priority
Proced!re o -nter RA/ M'DR
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Proced!re o -nterRA/ M'DR
Page100
/he proced!re or the interRA/ M'DR algorithm is similar
to that or the interre.!ency M'DR algorithm
- the service type is C1 AMR" #hen the interre.!ency M'
DR algorithm s#itch and interRA/ M'DR algorithm s#itch
are enabled sim!ltaneo!sly" the U* selects the neighboring
cell #hose meas!rement report is received irst
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Contents
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Contents
707 Meas!rementbased onPeriodic DRD
70702 Overvie#
70703 M'DR Algorithm 1#itches
70707 M'DR Proced!re
Overvie#
/rigger ondition o M'DR
M'DR /arget ell 1election
M'DR Meas!rement ontrol -tems
Page102
/rigger Conditions o M'DR
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/rigger Conditions o M'DR
Page10
i the M'DR algorithm is enabled or the service type to #hi
ch this RA' belongs" the RC triggers M'DR #hen either o
the ollo#ing conditions is met $ Uplin& admission threshold I M'DR congestion decision thres
hold J C!rrent cell load actor J Uplin& admission threshold
Do#nlin& admission threshold I M'DR congestion decision threshold J C!rrent cell load actor J Do#nlin& admission threshold
Parameters o /rigger Conditions o M'D
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R
Page10!
('MUlCacAlgo1el1#itch Parameter ame $ Uplin& CAC algorithm s#itch Recommended val!e $ one
('MDlCacAlgo1el1#itch
Parameter ame $ M'DR Cell Periority Recommended val!e $ ;
UserPercentage Parameter ame $ UserPercentage
Recommended val!e $ A::5U1*R
Parameters o /rigger Conditions o M'D
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R (Cont00)
Page10"
P!r!"eterP!r!"eter
n!"eReco""ended
v!l#e
UlNonCtrlThdForA!R5 threshold o#4on0 A7R ser0ice
)8
UlNonCtrlThdForNon
A!R
5 threshold o#4on0 non
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R (Cont00)
Page10#
P!r!"eter P!r!"eter n!"eReco""ended
v!l#e
*nterFre$Ul!bdr TriThre%hold
5 Theshold ,8
*nterFre$Dl!bdr TriThre%hold
D5 Theshold,8
*nterRatUl!bdrT riThre%hold
5 Theshold ,8
*nterRatDl!bdrT riThre%hold
D5 Theshold ,8
Contents
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Contents
707 Meas!rementbased onPeriodic DRD
70702 Overvie#
70703 M'DR Algorithm 1#itches
70707 M'DR Proced!re
Overvie#
/rigger ondition o M'DR
M'DR /arget ell 1election
M'DR Meas!rement ontrol -tems
Page10$
M'DR /arget Cell 1election
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M'DR /arget Cell 1election
Page10%
Ater M'DR is triggered" the RC starts target cell selection
/here are t#o conditions or target cell selection $ - the c!rrent cell has only one M'DR neighboring cell" the R
C instr!cts U* to meas!re the neighboring cell" and establishes services in the cell #hen it meets the re.!irements0
- the c!rrent cell has more than one M'DR neighboring cell" the RC instr!cts U* to meas!re the neighboring cells" the RC prioriti,es these cells and establishes service in the cell #iththe highest priority
Parameters o M'DR /arget Cell 1election
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Parameters o M'DR /arget Cell 1election
Page10&
Ma+Att(!m
Parameter ame $ -nter8re. DRD Ma+ Attempt /imes < -nterRA/ DRD Ma+ Attempt /imes
Recommended val!e $ 2
Contents
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Contents
707 Meas!rementbased onPeriodic DRD
70702 Overvie#
70703 M'DR Algorithm 1#itches
70707 M'DR Proced!re
Overvie#
/rigger ondition o M'DR
M'DR /arget ell 1election
M'DR Meas!rement ontrol -tems
Page110
-nter8re.!ency Meas!rement Control -tem
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s
Page111
1et the -nter8re.ReportMode parameter to $ P*R-OD-CA:5R*POR/-9 $ the U* reports meas!rement res!lt
s to the RC at an interval speciied by PrdReport-nterval 0 /hen" the RC determines #hether the signal .!ality o this interre.!ency cell meets the re.!irements according to the meas!rement res!lts and the trigger conditions
*K*/5/R-99*R $ the U* sends the RC a meas!rement report (3C) #hen the signal .!ality o the interre.!ency cell is higher than the trigger threshold or the period speciied by /rig/ime3C
-nter8re.!ency Meas!rement Control -tem
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s (Cont00)
Page112
1et the -nter8re.MeasB!anti ty parameter to$ *c
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-nter RA/ Meas!rement Control -tems
Page11
1et the -nterRatReportMode parameter to $ P*R-OD-CA:5R*POR/-9 $ the U* reports meas!rement res!lts
to the RC at an interval speciied by -nterRA/PeriodReport-nterval 0 /hen" the RC compares the meas!rement res!lts #ith-nterRA/4O/hd to determine #hether the signal .!ality o thisinterRA/ cell meets the re.!irements
*K*/5/R-99*R $ the U* sends the RC a meas!rement report(7C) #hen the signal .!ality o the interRA/ cell is higher than the trigger threshold(speciied by the -nterRA/4O/hd parameter) or the period speciied by /rig/ime7C
Parameters o -nter8re.!ency M'DR
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Parameters o -nter 8re.!ency M'DR
Page11!
P!r!"eter P!r!"eter n!"eReco""ended
v!l#e
*nterFre$Re'ort!ode
Inter-#re'uenc&7easure Re%ort 7ode
!?!T
Parameters o -nter8re.!ency M'DR
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Parameters o -nter 8re.!ency M'DR
Page11#
P!r!"eter P!r!"eter n!"eReco""ended
v!l#e
*nterRatRe'ort!ode
Inter-RAT Re%ort 7ode !?!T
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Contents
1. Overvie# o DRD
2. RR DRD
3.RA' onPeriodic DRD
4. RA' Periodic DRD
Page11%
Contents
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Contents
4. RA' Periodic DRD
>02 Overvie#
>03 1#itches or Periodic DRD
>07 /riggering Periodic DRD
>0> Periodic DRD Proced!re
Page11&
Principle o RA' Periodic DRD
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Principle o RA' Periodic DRD
Page120
Periodic DRD co!ld be perormed ater RA' set!p or ater th
e bearer scheme is changed
-t can be perormed to select a s!itable cell #hen the RC de
termines that the U* can be served by a better 41PA
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Contents
4. RA' Periodic DRD
>02 Overvie#
>03 1#itches or Periodic DRD
>07 /riggering Periodic DRD
>0> Periodic DRD Proced!re
Page121
1#itches o RA' Periodic DRD
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RA' DRD or a single service or a combined service is enable
d only #hen the associated s!b parameter o Dr1#itch is sel
ected DR5RA'51-95DRD51W-/C4
DR5RA'5COM'5DRD51W-/C4 /he 'asedOnMeas4RetryDRD1#itch parameter !rther de
termines #hether to enable blindhandoverbased nonperio
dic DRD" blindhandoverbased periodic DRD" or meas!reme
ntbased periodic DRD
1#itches o RA' Periodic DRD(Cont00)
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( )
Page12
When the 'asedOnMeas4RetryDRD1#itch parameter is set to O
DRD T&%es BlindDrdExce'tHRetrySwitch B OFF
/lind-Hando0er-
/ased
7easurement-
/asedPeriodic DRD Disable $n!%le
on-%eriodic
DRD
Disable $n!%le
DRD T&%es BlindDrdExce'tHRetrySwitch B ON
/lind-Hando0er-
/ased
7easurement-
/ased
Periodic DRD Disable $n!%le
on-%eriodic
DRD
$n!%le Disable
1#itches o RA' Periodic DRD(Cont00)
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( )
Page12!
When the 'asedOnMeas4RetryDRD1#itch parameter is set to O
88
Remar&$ 'lindhandoverbased periodic DRD is *nable i the Cha
nnelRetry/imer:en
parameter is not set to ;
DRD T&%es /lind-Hando0er-/ased 7easurement-/ased
Periodic DRD $n!%le&Re"!r'( Disable
on-%eriodic
DRD
$n!%le Disable
Contents
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4. RA' Periodic DRD
>02 Overvie#
>03 1#itches or Periodic DRD
>07 /riggering Periodic DRD
>0> Periodic DRD Proced!re
Page12"
/rigger Conditions o Periodic DRD
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gg
Page12#
41PA
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gg ( )
Page12$
/he conditions !nder #hich an 41PA
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gg g
Page12%
RetryCapabil i ty
Parameter ame $ 41PA /echnologies Retried by U*s Recommended val!e $ 1R'5OK*R541DPA$O" 1R'5OK*R541U
PA$O" //-53M1$O" M-MO$O" >BAM$O" :35*4AC*$O"D/5DR$O" 411CC45:*115OP*RA/-O$O" M-MO5>BAM$O88" DC541DPA$O88" U:5:35*4AC*$O88" U:52BAM$O88" *DPCC45'OO1/-9$O88" DCM-MO541DPA$O88
Contents
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4. RA' Periodic DRD
>02 Overvie#
>03 1#itches or Periodic DRD
>07 /riggering Periodic DRD
>0> Periodic DRD Proced!re
>0>02 'lind4andover'ased Periodic DRD
>0>03 Meas!rement'ased Periodic DRD
Page12&
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Proced!re o 'lind4andover'ased Periodic DRD
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c DRD
Page11
Contents
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4. RA' Periodic DRD
>02 Overvie#
>03 1#itches or Periodic DRD
>07 /riggering Periodic DRD
>0> Periodic DRD Proced!re
>0>02 'lind4andover'ased Periodic DRD
>0>03 Meas!rement'ased Periodic DRD
Page1
Application 1cenario o Meas!rement'ased Periodic DRD
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d Periodic DRD
Page1!
Meas!rementbased periodic DRD applies to the ollo#ing sc
enarios" -t selects the target cell according to the signal meas
!rement res!lts to increase the DRD s!ccess rate $ -nterre.!ency samecoverage scenario
-nterre.!ency dierentcoverage scenario Precondition o Meas!rement'ased Periodic DRD $
DR5RA'51-(95DRD51 -/C4 or DR5RA'5COM'5DRD51 -/C4 s!b parameter o Dr1#itch is set to O
'asedOnMeas4RetryDRD1#itch parameter is set to O
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Parameters o Meas!rement'ased Periodic DRD
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dic DRD
Page1$
P!r!"eter P!r!"eter n!"e
Reco""ended
v!l#e
Drd(rLdrFla Drd2r5dr6lag 6A5S!
HRetryTi#erLenth
DRD 7easurementPeriod Retr& Timer5ength
1s
PrdRe'ort*nterval Inter-6re'uenc& Periodic7easurement Re%ortInter0al
D$
TaretFre$ThdR%c '
Target 6re'uenc& RS4P Trigger Threshold
-" d/m
TaretFre$ThdEcN-
Target 6re'uenc& !co Trigger Threshold
-1" d/
DrdFaiPenaltyPeri odN
DRD 7easurement6ailure Punish Periods
1
1!mmary
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DRD RRC Phase
RRC DRD
– 'lindhandoverbased
Page1&
SET UCORRMALGOSWITCH
SET UDRD
ADD/MOD UINTERFREQNCELL
ADD/MOD U2GNCELL
1!mmary(Cont00)
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RA' Phase D!ring RA' *stablishment
(onPeriodic DRD)
– 'lind4andoverbased
– Meas!rementbased
Ater RA' *stablishment
(Periodic DRD)
– 'lind4andoverbased
– Meas!rementbased
Page1!0
SET UCORRMALGOSWITCH
SET UDRD
ADD/MOD UCELLDRD
ADD UINTERFREQNCELL
ADD U2GNCELL
ADD UCELLMBDRINTERFREQ
ADD UCELLMBDRINTERRAT
SET UCORRMALGOSWITCH
SET UDRD
ADD/MOD UCELLDRD
ADD UINTERFREQNCELLADD/ MOD UCELLMCDRD
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