WCDMA Load Control
Transcript of WCDMA Load Control
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Apr. 2006
Node B Products of Huawei
May 2008
WCDMA Load Control
HUAWEI TECHNOLOGIES CO., LTD.
www.huawei.com
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HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confdential a!e "
Overview
PUC
CAC
IAC
LDR
OLC
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Load Control exists in all !ases
Load Control is used to keep system stable, maximize system capacity w ileensurin! t e co"era!e and #o$.
%i&&erent load control al!orit ms accordin! to di&&erent p ases pro"ided'( )e&ore *+ access' otential *ser Control - *C( %urin! *+ access' Call Admission C eck -CAC and /ntelli!ent Access Control -/AC( A&ter *+ access' Load es u&&lin! -L% , and 1"erload Control -1LC
. A&ter *+ access2. %urin! *+ access3. )e&ore *+ access
4ime
5 LDRCACPUC5OLC
55 IAC
PUC" Potential User Control CAC" Call Ad#ission ControlIAC" Intelli$ent Ad#ission Control LDR" Load Res!ufflin$OLC" Overload Control
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Load control features
PUC 4 e &unction o& *C is to balance tra&&ic load amon! inter(&re uency cells. )y modi&yin!
cell selection and reselection parameters and broadcastin! t em t rou! system
in&ormation, *C leads *+s to cells wit li! t load. 4 e *+s may be in idle mode,
C+LL7 AC9 state, C+LL7 C9 state, or * A7 C9 state.
CAC 4 e &unction o& CAC is to decide on resource re uests &rom *+s, suc as access,
recon&i!uration, and ando"er re uests, accordin! to t e resource status o& t e cell.
IAC 4 e &unction o& /AC is to increase t e access success rate wit t e current #o$ assured
t rou! rate ne!otiation, ueuin!, preemption, and %irect etry %ecision -% % .
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Load control features
LDR 4 e &unction o& L% is to reduce t e load o& a cell w en t e a"ailable resources o& t e
cell reac t e speci&ied alarm t res old. 4 e purpose o& L% is to increase t e accesssuccess rate in t e &ollowin! ways'
Inter-frequency load handover
Code reshufflingBE service rate reduction
AMR voice service rate reductionUncontrolled realtime traffic QoS renegotiationCS inter-RA load handover!S inter-RA load handover
OLC 4 e &unction o& 1LC is to reduce t e cell load rapidly by restrictin! t e 4ransport ormat
-4 o& t e )+ ser"ice or releasin! *+s w en t e cell is o"erloaded. 4 e purpose o& 1LCis to ensure t e stability o& t e system and t e #o$ o& most *+s.
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Load Control for different cell load level
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%!res!olds and actions of t!e load controlal$orit!#s
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RAB inte$rate riorit&If t!e value of t!e ara#eter is set to %raffic Class' t!e inte$rate
riorit& a(ides (& t!e followin$ rules"Classes o& ser"ices' con"ersational (: streamin! (: interacti"e (:
back!round
$er"ices o& t e same class' priority based on Allocation; etention riority
-A "alues
1nly &or t e interacti"e ser"ice o& t e same A "alue' priority based on
49
$er"ices o& t e same class and priority' 9$% A or %C9 ser"ice pre&erred
on t e basis o& t e "alue o& t e /ndicator o& Carrier 4ype riority
parameter
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RAB inte$rate riorit&
If t!e value of t!e ara#eter is set to ARP' t!e inte$rate riorit&a(ides (& t!e followin$ rules"
A 3 (: A 2 (: A < (: A 3=
$ame A "alue' con"ersational (: streamin! (: interacti"e (:
back!round
1nly &or t e interacti"e ser"ice o& t e same A ' priority based on 49
$er"ices o& t e same A , class and 49 -only &or interacti"e ser"ice '
9$% A or %C9 ser"ice pre&erred on t e basis o& t e "alue o& t e
/ndicator o& Carrier 4ype riority parameter
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Priorit& Definition ) *xa# le
A) /% A 4ra&&ic Class 49 )ear 4ype
A 3 /nteracti"e %C9
) 3 /nteracti"e 9$% A
C 2 Con"ersational %C9
% 2 )ack!round %C9
+ 2 )ack!round 9$% A
2 $treamin! %C9
+ervices wit! different ARP,%C,%HP,Bear
A is t e top(priority, and 9$% A o"er %C9
4C is t e top(priority, and 9$% A o"er %C9
A>? A 4ra&&ic Class 49 )ear 4ype
) 3 /nteracti"e 9$% A
A 3 /nteracti"e %C9
C 2 Con"ersational %C9
2 $treamin! %C9
+ 2 )ack!round 9$% A
% 2 )ack!round %C9
A>? 4ra&&ic Class A 49 )ear 4ype
C Con"ersational 2 %C9
$treamin! 2 %C9
) /nteracti"e 3 9$% A
A /nteracti"e 3 %C9
+ )ack!round 2 9$% A
% )ack!round 2 %C9
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Priorit& Definition in Huawei I# le#entation
UserPriority
ARP 0 3 2 = @ 6 8 B 30 33 32 3 3=
UserPriorit& + 1 - - - - - . . . . . / / / /
User Integrate Priority "
) 0or #ulti le)RAB users' deter#ined (& t!e service wit! t!e !i$!estRAB Integrate Priority 1
User Priority "2old 3-4
+ilver 3.4 Bron5e 3/4
%& ical Ma in$ of 6ARP7 and 6User Priorit&7
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Overview
PUC
CAC
IAC
LDR
OLC
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Potentioal User Control
%!e PUC al$orit!# controls t!e cell selection of a otential U* and revents an idle U* fro#ca# in$ on a !eav& load cell1
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Potentioal User ControlCell load co#es wit! t!ree levels" !eav&' nor#al' and li$!t1F en cell load is i! er t an t e load le"el di"ision upper t res old plus t e load le"el di"ision
ysteresis, it is decided to be ea"y.F en cell load is lower t an t e load le"el lower t res old plus t e load le"el di"ision ysteresis, it
is decided to be li! t.
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Potentioal User Control
Based on t!e cell load' PUC wor9s as follows"/& t e cell load becomes ea"y, *C modi&ies cell selection and reselection
parameters and broadcasts t em t rou! system in&ormation. /n t is way, *C
leads *+s to nei! borin! cells wit li! t load.
/& t e cell load becomes normal, *C uses t e cell selection and reselection
parameters con&i!ured on t e LM4.
/& t e cell load becomes li! t, *C modi&ies cell selection and reselection
parameters and broadcasts t em t rou! system in&ormation. /n t is way, *C
leads *+s to t is cell.
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HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confdential a!e *'
Overview
PUC
CAC
IAC
LDR
OLC
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Resource Ad#ission C!ec9 Overview
Affected users Users in connected mode
Procedure Make decision whether to admit
new users or service upgrade
according to the available system
resources.
Resources to
check
1. DL Channelization Code
2. adio esource! "ower #
$nter%erence
&. Credit! esource
'. $ub transmission bandwidth
For
HSDPA/HSUPAMa(imum user number per Cell #)ode*
Admission re6uest
Code resource based admissionG
Credit resource based admissionG
/ub resourcebased admissionG
0esource admission passed
,ower resource based admissionG
Hes
Hes
Hes
Hes
Hes
0esource admission denied
>o
>o
>o
>o
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Ad#ission C!ec9 of Radio Resource
UL and DL inde endentl&
On t!e (asis of %CP , R%WP On t!e (asis of e:uivalent user nu#(er
e uest initiation
*plink calladmission desicion
AdmittedG
%ownlink calladmission desicion
AdmittedG
e uest admitted e uest reIected
+nd
>o
>o
Hes
Hes
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Ad#ission Al$orit!# +election
Al$orit!# - " (ased on %CP,R%WP #easure#ent and load incre#ent esti#ation%ownlink'
Load le"el de&inition' 4C -4ransmitted Carrier ower
*plink'
Load le"el de&inition' load &actor
Load increment o& t e new re uest is taken into consideration.
Al$orit!# . " (ased on static *:uivalent Nu#(er of Users calculation
$tandard user' 32.2kbps AM wit acti"e &actor 300J.
Al$orit!# / " (ased on current %CP,R%WP #easure#ent)ased on 4C ; 4F measurementK
Load increment o& t e new re uest is not taken into consideration
RTWP
P N
UL −= 1η
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U lin9 Ad#ission Al$orit!# - ; /
)/( No Ec Fun=∆ η
*plink admission control re uest
Eet measured 4F and calculatet e current uplink load &actor.
Calculate t e increment o& t e
uplink load due to t e re uest.
Eet t e predicted uplink load&actor.
RTWP P N
UL −= 1η
LU UL predicted UL η η η ∆+=
,
Compare t e predicted "alue witadmission t res old
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Downlin9 Ad#ission Al$orit!# -;/
)/ _ ,/( No EcCPICH No Ec Fun P =∆
%ownlink admission control re uest
Eet measured current 4C
Calculate t e increment o& t edownlink power due to t e re uest.
Eet t e predicted downlink totalpower
Compare t e predicted power witadmission t res old
TCP
P TCP P ∆+= predicted
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Priorit& Handlin$ of Ad#ission C!ec9
Para#eters Default value
U" #andover access threshold 80
U" threshold of Conv AMR service @
U" threshold of Conv non$AMR service @
U" threshold of other services 60
%!res!old for u lin9 radio resource ad#ission c!ec9
Para#eters Default value
%" #andover access threshold 8@
%" threshold of Conv AMR service 80
%" threshold of Conv non$AMR service 80
%" threshold of other services @
5%!res!old for downlin9 radio resource ad#ission c!ec9
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Code Mana$e#entCode mana!ement is used to mana!e t e code resource between all t ep ysical c annels, includin! common c annel -CC9 e.!. C /C9 and
CC C9, dedicated c annel -% C9 , and s ared c annel -9$% A .
% C9CC9
$ 36$ 8
$=
9$% A
Code &or % C9'- %ynamically allocated
Code &or common c annel'- eser"ed
Code &or 9$% A'- $ ared wit BB - e&er to 9$% A part
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Code Allocation Mec!anis#
eser"e t e codeswit smallest $ toimpro"e utilizationrate o& w ole codetree.
1n t e basis o& maximum &ree sub(tree
Less code&ra!mentsare le&t
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Ad#ission C!ec9 of Iu( Bandwidt!
DPCH +ervice
)andwidt consumption'M) Active factor
H+DPA +ervice)andwidt consumption'
E) Active factor
%raffic ClassActive0actor +co e
Common C annels 3
>ode)
$ ) 0.B
4elep ony -AM NO1/ 0.
BB Con"ersational -O 3
BB $treamin! 3
BB /nteracti"e 0.B
BB )ack!round 0.B
9$% A $treamin! 3
9$% A /nteracti"e 0.B9$% A )ack!round 0.B
Confi$ura(leer service
t& e
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Ad#ission C!ec9 of NodeB Credit
Ad#ission C!ec9"
Credits o& local cellCredits o& local cell !roup
Credits o& >ode)
Credit Consu# tion Law"eported &rom >ode)
/n terms o& $
9$% A is not in"ol"ed
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HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confdential a!e "(
Overview
PUC
CAC
IACLDR
OLC
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Intelli$ent Ad#ission Control Overview
,reemption
#ueuin!
%0%
Ad#issional$orit!#
$ucceeded
8ailed
8ailed or notsupported
8ailed or notsupported
$er"ice re6uestdenied
$er"ice re6uestadmitted
8ailed
$ucc(eeded
$ucc(eeded
$ucc(eeded
8ailed$ucc(eeded
8ailed
$ucceeded $ucceeded
RAB rocessin$
RRC connection rocessin$
/u #os >e!otiational!orit m switc
*+ capability
0A) establis ment0A) modi&ication
/nbound relocation
0aterecon&i!uration
ard ando"er
Cell loadin&ormation list L/4
+cenario
L%M C0M 1t ers
%CCC al!orit m switc
Ratene$otiation
,$ domain'maximum ratene!otiation
,$ and C$domains'initial ratene!otiation
,$ domain )+ser"ice'
tar!et ratene!otiation
Load admission
Code resourceadmission
/ub resourceadmission
Credit resourceadmission
8ailedRRC connectionre:uest
Ad#issional$orit!# DRD Redirection
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Rate Ne$otiation in IAC
5 8=kbps
52@6kbps
5328kbps
56=kbps
5 2kbps
U* ca a(ilities5 P!&sical la&er ca a(ilit&5 %rans ort c!annel ca a(ilit&5 RLC ca a(ilit&
Maxi#u# allowed (it rate
+&ste# load5 C!anneli5ation codes5 Iu( trans#ission resources5 Radio resources
Initial data rate , %ar$et data rate
+cenarios" RAB setu RAB #odif&' reconfi$uration
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Rate Ne$otiation in IAC
Rate ne$otiation includes t!e #axi#u# ex ected rate ne$otiationand initial rate ne$otiation1
Maximum expected rate ne!otiation
/nitial rate ne!otiation
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Pre)e# tion and =ueuin$
=ueuin$
Wei$!t (ased :ueuin$Periodicall& retr&
Pre)e# tion
Low-io-it
Hi!h-io-it
Inte$rate Priorit& considered") %raffic Class) Allocation,Retention Priorit&
) Bear %& e 3R88,H+DPA4) %HP 3%raffic Handlin$ Priorit&4
Priority basedPre-empt
P:ueue > %#ax ? %ela sed) %ela sed " t!e ti#e w!ic! t!e service re:uest !as :ueued1
) %#ax " t!e #axi#u# ti#e w!ic! t!e service re:uest can (e
in t!e :ueue1
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Resource to tri$$er ree# tion
/& cell resource decision &ails and t e >C recei"es a A) A$$/E>M+>4
+#*+$4 messa!e, indicatin! t at preemption is supported, t en t e >C
per&orms t e preemption &unction.
4 e &ollowin! table describes w ic resource can tri!!er t e preemption
procedure &or di&&erent ser"ices.
Se-/ice 0e1ou-ce That can T-i!!e- -eem2tion
owe- ENU Code Iu3 CE U1e-Num3e-
DCH 4 4 4 4 4 5
HSD A 5 4 5 4
HSU A 4 5 4 5 4
676S 4 4 4 4 5
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RRC Direct Retr& ; Re)direction
- RR C C ONN*C %ION R* =U* +%. R RC CONN* C%ION +* %UP/ RRC CON N*%ION +* %UP CO MPL *%*
RRC ConnectionDirect Retr&
%urin! t e C connection setup, i& t e *+ &ails to access t e cell, t e >C
c ooses a suitable inter(&re uency cell and directs t e *+ to try t is cell.
RRC ConnectionRe)direction
/n t e case o& C % % &ailure, t e >C includes an inter(&re uency or inter(A4 redirection indication in t e C C1>>+C4/1> +P+C4 messa!e. 4 is
messa!e directs t e *+ to initiate an inter(&re uency or inter( A4 C
connection setup a&ter cell selection or resection.
Initi all& ca# in $on cell -
0-
0.
Cell-
Resourcea l&
- .
RRC Direct R et r&suc ce ssfull & on cell ./
- RRC CON N*C% ION R*= U*+ %. RR C CO NN*C %IONR* @*C%3Redi rection inf o 4/ Cel l resel ectio n" In ter)f re: ac cessOr / Cell r eselec tion " Inte r)RA % acc ess
Initi all& ca# in$on c ell -
0-
0.
Cell-
Resourcea l&
- .
RRC R e)Dire ct to In ter )0r e: or in ter )RA% c e ll/
Cell.Inter)RA% Cell-Inter)0re: Cell-
2+M
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RAB Direct Retr&RAB DirectRetr&
A) % % is used w en *+ initiates A) A$$/E>M+>4 procedure but is re&used
by t e ori!inal cell and may retry to ot er cells.
Inter)0re: Cell.
CN
Cell-
-
.
+RNC
/
- RAB Assi$n#ent3fro# CN4. RB +*%UP 30re:-4/ RB +*%UPCOMPL*%*
RAB Assi$n#entRes
4 e >C determines t e admissiono& t e inter(&re uency tar!et cell &orblind ando"er.
/& t e admission is accepted, t e% % procedure is per&ormed &or t einter(&re uency tar!et cell &or blind
ando"er.
4 e >C starts t e L setupprocedure to complete t e inter(&re uency ard ando"er.
4 e >C starts t e ) setupprocedure to complete t e inter(&re uency ard ando"er on t e *uinter&ace and t e ser"ice setup
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Para#eters" Intelli$ent Ad#ission Control
RateNe$otiation
-1P+ #axi#u# rate ne$otiation.1P+ ; C+ initial rate ne$otiation/1P+ tar$et rate ne$otiation
Pre)e# tion -1User riorit& (ased re)e# tion for R88.1RAB riorit& (ased re)e# tion forH+DPA
=ueue -1RAB riorit& (ased :ueuin$1
DRD +witc!
DRD -1RRC connection direct retr&.1RRC connection redirection/1RAB direct retr&
Ma !ueuing "i#e $engt%
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Overview
PUC
CAC
IACLDR
OLC
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Load Res!ufflin$
PowerResources
Iu( %rans#issionResources
NodeB CreditResources
Handover Downsi5in$ RAN)CNRene$otiation
IRA%HO
I0HO
DCCC
AMRC
0or P+ +trea#in$
+ervice =ualit&Unc!an$e +ervice =ualit&Down$rade
C+
P+
Load Res!ufflin$ 3LDR4
Monitorin$ load' tri$$ert!e actions
corres ondin$ to (asiccon$estion
Code Resources
CodeRes!ufflin$
MBM+Power Down$radin$
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Availa(le Res!ufflin$ Actions And O( ects
Resource UL,DL
LDR Actions
Inter)0re: HO
B* RateReduction
Inter)RA%
C+ HO
Inter)RA% P+
HOAMR
ReductionIu =o+
Rene$otiationCode
Res!ufflin$MBM+ PowerDown$radin$
PowerResource
ULDL
CodeResource
UL 1
DL
NodeB CreditUL √
DL
Iu( %rans ortResource
UL DL
O( ect
LDR Actions
Inter)0re: HO
B* RateReduction
Inter)RA% C+HO
Inter)RA% P+HO
AMRReduction
Iu =o+Rene$otiation
CodeRes!ufflin$
MBM+ PowerDown$radin$
DCH
H+DPA
H+UPA
MBM+
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Load Res!ufflin$ Due %o Power Li#itation
trig ldr N Thr
RTWP P RTWP
_ >−
=η
U lin9
Downlin9
sup _ max max( min( , ))non hspa GBR h a res hspa total ldr P GBP P P P Thr − − −+ + > ×
eser"ed power &or 9$* Arelated %L c annels -4 epower o& downlink control
c annels -+(AEC9;+(EC9;+(9/C9
%l #SU!A reserved factorADD C*LLCAC
E R%WP (ased UL LDR
E Power (ased DL LDR
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Load Res!ufflin$ Due %o Code Li#itation
%ri$$er condition
Cell S& reserve threshold
Ma' user num(er of code ad)ust
ADD C*LLLDR
Actions
Minimum a"ailable $ : reser"ed $ 74 d
E Code res!ufflin$
E B* rate reduction
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Load Res!ufflin$ Due %o NodeB Credit Li#itation
%ri$$er condition
Actions
, , , _ NodeB UL NodeB current UL Ldr ULC C Thr − ≤
, , , _ NodeB DL NodeB current DL Ldr DLC C Thr − ≤
E UL,DL se arate
E Inter)RA% P+,C+ HO
E B* rate reduction
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HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confdential a!e $#
Load Res!ufflin$ Due %o *NU Li#itation
resCCH DCH DL N N N _ +=
trig ldr
Ma
UL
Thr ! !
_ >=η
UL
CCH
UL
DCH
UL
"trea# H
UL
BE H
UL
H"UP$
UL ! ! ! ! ! ! ++++= −−
U lin9
Downlin9E 0or R88 cell
ldr dchresCCH DCH Thr N N N −⋅>+ max _
E 0or H+DPA cellIf *NU (ased DL LDR is ena(led' H+DPA users s!all not (e
selected to erfor# load res!ufflin$ actions1
E *NU (ased UL LDR
% i$$ f LDR
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HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confdential a!e $$
%ri$$ers of LDRPower Resource"
Load le"el : L% tri!!er t res old
Iu( Bandwidt!" A"ailable /ub bandwidt Q prede&ined t res old
MML co##and Para#eter na#e Para#eter ID Default value A%%;M1% C+LLL%M *L;%L L% tri!!er t res old *LL% 4 /E49%
%LL% 4 /E49%@@J
0J
A%%;M1%
AAL2A%P>1%+
4 orward con!estion control t res old4 )ackward con!estion control t res old
> 4 orward con!estion control t res old> 4 )ackward con!estion control t res old
9s 4 orward con!estion control t res old9s 4 )ackward con!estion control t res old9s>rt orward con!estion control t res old9s>rt )ackward con!estion controlt res old
4 FC1>E49%4)FC1>E49%
> 4 FC1>E49%> 4)FC1>E49%9$ 4 FC1>E49%9$ 4)FC1>E49%9$> 4 FC1>E49%9$> 4)FC1>E49%
B@JB@JB@JB@JB@JB@JB@JB@J
>o
C eck t e load o& t eser"in! periodically
/s t e load i! er t anbasic con!estion tri!!er
t res old
4ake con!estionrelease measures
Hes
>o
+nd load adIustment
Hes
/s t e load lower t anbasic con!estion release
t res old
I t )0 & H d i LDR
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HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confdential a!e $%
Inter)0re:uenc& Handover in LDRCandidate tar!et cell'
RL% tri!!er t res old in tar!et cell D current load le"el in tar!et cellS :
rede&ined t!res!old in tar!et cell
Candidate users'*sers wit t e lowest Inte$rated Priorit&)it rate smaller t an t e prede&ined #axi#u# (andwidt!
Action')lind ando"er
Cell 3
Cell 2
Load' i!
Load' low
MML co##and Para#eter na#e Para#eter ID Defaultvalue
A%%;L$4;M1%
C+LLL%*L;%L /nter(&re cell load
ando"er load space t res old
*L/>4+ +#91C+LLL1A%
$ AC+49%
%L/>4+ +#91C+LLL1A%
$ AC+49%
20 -J
*L;%L /nter(&re cell load
ando"er maximum bandwidt
*L/>4+ +#91)F49%;%L
/>4+ +#91)F49%
=00 -kbps
B* R R d i i LDR
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HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confdential a!e $&
B* Rate Reduction in LDR
Candidate *sers'
*sers wit t e lowest inte$rated riorit&1nly B* services are in"ol"ed.
Action'
econ&i!uration
Hi!he1t Hi!h Lowe1t
Bit rate
G70
Priorit&
#($8321*"(8321
&$8 &$8 &$8
MML co##and Para#eter na#e Para#eter ID Defaultvalue
A%%;L$4;M1%C+LLL%
*L;%L L% ()+ ratereduction A) number
*LL% )+ A4+ +%*C4/1> A)>*M
%LL% )+ A4+ +%*C4/1>
A)>*M
3
AMR R t R d ti i LDR
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HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confdential a!e $'
AMR Rate Reduction in LDR
Candidate ser"ice'
AM ser"ice wit t e lowest inte$rated riorit& Action'
%ownlink' ate control o"er /u inter&ace
*plink' 4 C control o"er *u inter&ace.
MML co##and Para#eter na#e Para#eter ID Defaultvalue
A%%;L$4;M1%
C+LLL%*L;%L L% (AM rate
reduction A) number
*LL% AM A4+ +%*C4/1> A
)>*M
%LL% AM A4+ +%*C4/1> A
)>*M
R% + i + R $ ti ti i LDR
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HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confdential a!e $(
R% +ervice =o+ Rene$otiation in LDR
Candidate ser"ice'$ streamin!
Action'#o$ rene!otiation o"er /u
3 >C' A) modi&ication re uest -/u
2 C>' A) assi!nment -/u
>C' recon&i!uration -/ub;*u
MML co##and Para#eter na#e Para#eter ID Defaultvalue
A%%;L$4;M1%
C+LLL%*L;%L L% un(ctrl 4
#os re(ne!o A) num
*LL% $ 4#1$ +>+E A)
>*M
%LL% $ 4#1$ +>+E A)
>*M
3
Inter)RA% Handover of LDR
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HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confdential a!e $)
Inter)RA% Handover of LDR
Candidate tar!et cell'
2E cells wit same;bi!!er co"era!e as ser"in! E cell
Candidate users'*ser wit lowest /nte!rated riority
Actions'
P+ service inter( A4 ando"er C+ service inter( A4 ando"er
WCD6A
GS6 CELL
Load9 hi!h
MML co##and Para#eter na#e Para#eter ID Defaultvalue
A%%;L$4;M1%
C+LLL%*L;%L L% $ inter(
rat o user number
*LL% $/>4+ A491*$+ >*M
%LL% $/>4+ A491*$+ >*M
3
*L;%L L% C$ inter(
rat o user number
*LL% C$/>4+ A491*$+ >*M
%LL% C$/>4+ A491*$+ >*M
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HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confdential a!e %+
Overview
PUC
CAC
IACLDR
OLC
Overload Control 3OLC4
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HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confdential a!e %*
Overload Control 3OLC4
Actions supported'
4 C Control o& BB )+ ser"ice
%rop o& low priority *+s$e uence o& 1LC actions'
ast 4 C control (: Call drop o& *+s
C eck t e load o& t e
ser"in! periodically
/s t e load i! er t ano"erload con!estion tri!!er
t res old
Hes
>o
Hes
>o
4ake actions to releasecon!estion
+nd load adIustment
/s t e load lower t ano"erload con!estion release
t res old
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HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confdential a!e %"
0ast %0C Control in OLC
Monitor Cell Load
/& Cell load :Con!estion t res old
Con!estion %etected
and in&orm MAC
Con!estion elie"edand in&rom MAC
MAC decrease t emax 4 number
$tart a AdIust 4imer
expires
?ill t e AdIust 4imer
MAC increase t e
max 4 number
$tart a eco"er 4imer
expires
%ownlink 4 C Control
er&ormed wit in MAC(d; >C
*plink 4 C Control
>C (: *+' 4 C control
P # t f O l d C t l
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HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confdential a!e %#
Para#eters of Overload Control
MML co##and Para#eter na#e Para#eter ID Default value A%%;L$4;M1%
C+LLL%M
*L;%L 1LC tri!!er t res old *L1LC4 /E49%
%L1LC4 /E49%
B@J
*L;%L 1LC elease t res old *L1LC +L49% %L1LC +L49% B0J
A%%;L$4;M1%
C+LL1LC
*L;%L 1LC &ast 4 restrict A) number *L1LC 4 $4 C4 A)>*M
%L1LC 4 $4 C4 A)>*M
%ata rate restrict coe&&icient A4+ $4 C4C1+ 68J
%L 1LC &ast 4 restrict data rate restrict
timer len!t
A4+ $4 C44/M+ L+> $
%L 1LC &ast 4 restrict data rate reco"er
timer len!t
A4+ +C1O+ 4/M+ L+> @$
*L;%L 1LC tra&& release A) number *L1LC4 A +L A)>*M%L1LC4 A +L A)>*M
0
+u##ar&" Load Control Para#eter Classification
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HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confdential a!e %$
+u##ar& Load Control Para#eter Classification>C
adioClass
Elobal araClass CellClass
L%M.Class
C+LL *C.Class*$+ /1 /4H.Class
C1 MALE1$F/4C9 .Class
C.Class
#*+*+ ++M 4.Class
C+LLL%M.Class
C+LLL% .Class
C+LL1LC.Class
C+LLCAC.Class
U$&D$ 'asic #eas rprt cycle( Unit)*+#s
U$&D$ 'asic #eas rprt cycle( Unit)#in
L%M.Class
Integrate Priority ,onfigure- Reference
In-icator of ,arrier "ype Priority
*$+ /1 /4H.Class
RAB Downsi.ing /witc%
/witc%er for IU !o/ 0egotiation
C1 MALE1$F/4C9 .Class
Uplink initial access rates
Downlink initial access rates
C .Class
C+LLL% .Class
U$&D$ Inter1fre2 cell loa- %an-over loa- space t%res%ol-
U$&D$ Inter1fre2 cell loa- %an-over #a i#u# 'oun- wi-t%
U$&D$ $DR1BE rate re-uction RAB nu#'er
U$&D$ $DR un1ctrl R" !os re1nego RAB nu#
U$&D$ $DR ,/ inter1rat %o user nu#'er
U$&D$ $DR P/ i nter1rat %o user nu#'er
U$&D$ $DR1AMR rate re-uction RAB nu#'er
$oa- level -ivision t%res%ol- *
$oa- level -ivision t%res%ol- 3
$oa- level -ivision %ysteresis
C+LL *C.Class
Pree#pt algorit%# switc%
!ueue algorit%# switc%
Poll ti#er lengt%
#*+*+ ++M 4.Class
U$ t%res%ol- of ,onv AMR service
U$ t%res%ol- of ,onv non4AMR service
U$ t%res%ol- of ot%er services
U$ 5an-over access t%res%ol-
D$ t%res%ol- of ,onv AMR service
D$ t%res%ol- of ,onv non4AMR service
D$ t%res%ol- of ot%er services
D$ 5an-over access t%res%ol-
D$ total non%s-pa e2uivalent user nu#'er
Ma i#u# 5/DPA user nu#'er
C+LLCAC.Class
U$&D$ O$, fast "6 restrict ti#es
U$&D$ O$, fast "6 restrict RAB nu#'er
Data rate restrict coefficient
U$&D$ O$, traff release RAB nu#'er
C+LL1LC.Class
U$&D$ $DR trigger t%res%ol-
U$&D$ $DR release t%res%ol-
U$&D$ O$, "rigger t%res%ol-
U$&D$ O$, Release t%res%ol-
C+LLL%M.Class
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%!an9 Fou