admission and congestion control praticas internas
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Capacity ManagementAdmission Control & Congestion Control
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Capacitymanagement
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Capacity >> LIMITED RESOURSES
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Capacity >> LIMITED RESOURSES
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Capacity Management
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ADMISSIONCONTROL
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ADMISSION Control OLICIES
If the resource is:
• Up till the admission level, the request is admitted.
ADMITTED
Between the admission and maximum level, (guaranteed, non-handover or (non-
guaranteed, non-handover!handover requests are not admitted unless "# $oft %ongestion
actions can find the required resources to release.
CONDITIONALLY BLOCKED
BLOCKED
BLOCKED
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Admission Re!"est Attri#"tes
Indication of additional resources required, including additional U&!'&
channeliation codes, U&!'& )$*, and so on
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RA$ ASSI%NMENT REUEST message
IE/Group Name Presence Range IE type anre!erence
"emant#csescr#pt#on
Cr#t#ca$#ty Ass#gneCr#t#ca$#ty
+essage pe + ./.0.0 1*$ re2ect
RABs To Be "etup OrMo#!#e L#st
3 1*$ ignore
%RABs To Be "etupOr Mo#!#e Item IEs
0 to4maxnoof")Bs5
%%&#rst "etup OrMo#!y Item
+ 6roupingreason:samecriticalit
*)%7 re2ect
555")B I' + ./.0./ he same")B I' mustonl 8epresent inone group.
-
555#)$$nchronisationIndicator
3 ./.9.0 -
%%%RABParameters 3 '()(*(+ Includes allnecessarparametersfor ")Bs(8oth for+$% and$6$#including;o$.
-
IE/Group Name
RAB parameters
5raffic %lass
5")B )smmetr Indicator
5+aximum Bit "ate
56uaranteed Bit "ate
5'eliver 3rder
5+aximum $'U $ie
%"D, parameters
5ransfer 'ela
5raffic 7andling <riorit
%A$$ocat#on/Retent#on pr#or#ty
5$ource $tatistics 'escriptor
5"elocation "equirement
5$ignalling Indication
5*xtended +aximum Bit "ate
")B <arameters
")B )ssignment "equest message I*sInformation *lements
96<<
/=.>09 ")#)<
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SO'T CON%ESTION
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SO'T CON%ESTION AL%ORIT(M
"# $oft %ongestion will not target users that have alread ongoing 73
attempts, or that have 8een triggered (8ut not finished to do soft congestion
actions 8 earlier admission requests.
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DO)nlin*c+anneli,ationCodes
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Do-nlin* C+anneli,ation codes
"& *
"& )
"&
"& -
"& *."& +)"& ."& *)-"& )3.
0? 7$'<) codes
9 7$-$%%7
0 user @ "<$A>!9> @ $
/ users @ "
<$A>!0/ @ $ 0A
> users @ "<$A>!A> @ $ 9/
)%7
$ A>
%<I%7
B%7
)I%7
<%7
<I%7
4-"peec5
users 6
"& *)-
"& *
"& )
"&
"& -
"& *."& +)"& ."& *)-"& )3.
"& *
"& )
"&
"& -
"& *."& +)
"& .
/A 7s users @ )-'%7
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Con#t#ona$$y
B$oc7e"o!t Congest#on
Do-nlin* C+anneli,ation
C he admission request can 8e grante if the resource usage p$us t5ea#t#ona$ "& is 8elow the admission level dlCodeAdm.
C )dmission limit (dl%ode)dm is set to ?D (reserving 0?D of the code
tree for new handover legs.
Do0n$#n7 Coe ,sage 8
9 A#t#ona$ Re1uest48
dlCodeAdm
'48
*448
<$ ", 7$,
Eoice,E - "etup
Eoice,E - :O
Grante
GranteGrante
B$oc7e
B$oc7e
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Do-nlin* C+anneli,ation
ADMITTED
CONDITIONALLY BLOCKED
BLOCKED
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DO)nlin* Transmitted carrier
po-er
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%<I%7
%ommon %hannels
0??D (+axransmission<ower F +ax'l<ower%apa8ilit
D (<ower3ffset F 0>
=D (<ower)dm F =
/?D
G 0?D
User raffic
)dmission %ontrol
%ongestion %ontrol
DO)nlin* T. carrier po-er
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DO)nlin* T. carrier po-er
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C he admission request can 8e granted if the resource usage plus the
additional '& transmitted carrier power is 8elow the admission levelp0rAm.
C )dmission limit (p0rAm is currentl set to =D.
C +onitored 'l ransmitted carrier power is considered for " traffic ( #o
7$'<) <ower
Do0n$#n7 P0r ,sage 8
9 A#t#ona$ Re1uest48
*448
<$ ", 7$,
Eoice, E- "etup
Eoice, E- :O
Grante
GranteGrante B$oc7e
PwrAdm
-38
Con#t#ona$$y
B$oc7e
"o!t Congest#onB$oc7e
DO)nlin* T. carrier po-er
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DO)nlin* T. carrier po-er
ADMITTED
CONDITIONALLY BLOCKED
BLOCKED
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DL & UL Spreading'Actors
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C #ew "equests with $HH, are denied if num8er of
connections exceed sfHH)dm
C ,L "& :#stogram Am#ss#on Po$#cy
/s!Am,$; s!-Am,$; s!*.Am,$; s!-gAm,$
C DL "& :#stogram Mon#tor Am#ss#on Po$#cy
/s!-Am; s!*.Am; s!+)Am; s!*.gAm
C
DL & UL Spreading 'Actors
Actua$ con!#gurat#on
s!Am,$ < +
s!-Am,$< .
s!*.Am,$ < 34
s!-gAm,$ < .
Actua$ con!#gurat#on
s!-Am < +
s!*.Am < .
s!+)Am < *)
s!*.gAm < .
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Do0n$#n7 %hannel
*lement %onsumption
,p$#n7 %hannel
*lement %onsumption
DL & UL Spreading 'Actors
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UL & DL ()
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C he admission request can 8e granted if the resource usage plus theadditional '&!U& 7ardware is 8elow the admission level dlHwAdm/ulHwAdm.
C )dmission limit dlHwAdm=100% (disabled) and ulHwAdm=90%.
,L := ,sage8 9
A#t#ona$ Re1uest48
*448
<$ ", 7$,Eoice, E- "etup
Eoice, E- :O
Grante
GranteGrante B$oc7e
ulHwAdm
'48
Con#t#ona$$yB$oc7e
"o!t Congest#onB$oc7e
UL & DL ()
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ASE Admision olicyC $ame 8ehavior for 'ownlin and Uplin )$*
C )$*: )ir Interface $peech *quivalents ()$* in uplin and downlinC his monitor accounts for the air interface resources usage in a cell.
C %urrentl 'I$)B&*': ( #o 8locs due to U&!'& )se/ aseDlAdm=500 (MAX A!"#)
/ ase"lAdm=500 (MAX A!"#)
48
<$ ", 7$,
Eoice, E - "etup
Eoice, E - :O
Grante
Grante
aseDlAdm=500
ase"lAdm=500
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"er>#ng an Non?ser>#ng E,L Am#ss#on Po$#cy
"# )dmission %ontrol must re2ect an *U& user, requesting the cell as serving cell if the total
num8er of serving cell *U& users including the requested is a8ove eu$"er>#ngCe$$,sersAm
parameter.
*U& users can 8e in soft!softer handover. It is also possi8le to 8e a8le to limit the *U& usershaving the cell as non-serving cell. his is to 8e a8le to limit the amount of U& hardware
reserved for the non-serving connections.
•eu$"er>#ngCe$$,sersAm; eu$Non"er>#ngCe$$,sersAm(
Ot+er Admission olicies
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CongestionControl
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Congestion Control
C Detects and Reso$>es the following tpes of overload
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CongestionDetection
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UL RT) CELL CON%ESTION
Congest#onCongest#on
so$>eNo congest#on
< . s
< .)*
Actua$$y #sa@$e
#&Cong F A/0F ->. dBm
#&:yst F A??? F A????ms
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DL Cell Congestion
Congest#onCongest#on
so$>eNo congest#on
Actua$ con!#gurat#on
p0rAm < -38
p0rO!!set < *8
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DL CELL CON%ESTION E2AMLE
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DL (SDA Congestion Detection
Congest#on Congest#onso$>e
No congest#on
Actua$ con!#gurat#on
max<ower3verload7stime F 0? s
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CongestionResol3e
(Andling
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DL Cell and DL (SDA Congestion
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DL Cell and DL (SDA CongestionResol3e (andling
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Congestion Control Resol3e Actions
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CON%ESTION CONTROL RESOL4E
< + A"E < * A"E
< + s
< 4(- s< ) s
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racticale.amples
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Spotting #loc*ing in SMART
D'5678 RA$ $loc*ing E2AMLE
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D'5678 RA$ $loc*ing E2AMLEd"e to DL C( Codes & DL T. -r
%" to clear
8locing
J implementation of 7$'<)K
roll8ac to default parameters
#ew %" to reduce 8locing
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I' yo" +a3e a CSSR degradation
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)(AT to loo* 9or:
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RRC $loc*ing
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RA$ $loc*ing
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Congestion
( t l it it+ t i ti :
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(o- to sol3e it -it+ parametri,ation:examples for some common issues
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Additionaldoc"ments
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