signaling system 7

7/17/2019 Signaling System 7

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© 2007-2008 UVSC CS 479R – Telecommunca!on" an# Voce )

C*S 479R Voce $%er &'

Signaling System 7Gary D. Brown+ Gue"! ,ec!urer

,ec!ure 2



© 2007-2008 UVSC CS 479R – Telecommunca!on" an# Voce 2

S(naln( Sy"!em 7 SS7

/ &n!ro#uc!on/ SS7 *e!wor 1rc!ec!ure

/ SS7 'ro!ocol"

/ SS7 Call S(naln(

/ Vo&' &""ue"




SS7 'ro!ocol"

/ 1rc!ec!ure – Den!on"

/ 5unc!onal D%"on"

– TD6-a"e# Tran"or! 'ro!ocol" – &'-a"e# Tran"or! 'ro!ocol"

– 1lca!on-layer 'ro!ocol"

/ Call Con!rol – 6e""a(e"

– 6e""a(e 5low"




SS7 'ro!ocol"1rc!ec!ure

OSI Model Signaling Point Functions SS7 Model

Layer 7

TCAP

ISUP Level 4

Layer 6

Layer

Layer 4 SCCP

Layer ! MTP! M!UA Level !

Layer " MTP" SCTP Level "

Layer # MTP# $t%ernet Level #



© 2007-2008 UVSC CS 479R – Telecommunca!on" an# Voce :

/ 6T') 6e""a(e Tran"er 'ar! ,ayer )/ 6T'2 6e""a(e Tran"er 'ar! ,ayer 2

/ 6T'3 6e""a(e Tran"er 'ar! ,ayer 3

/ SCT' S!ream Con!rol Tran"m""on 'ro!ocol &'/ 63U1 6T'3 U"er 1#a!a!on ,ayer &'

/ SCC' S(naln( Connec!on Con!rol 'ar!

/ TC1' Tran"ac!on Caal!e" 1lca!on 'ar!/ &SU' &SD* U"er 'ar!

/ TU' Teleone U"er 'ar! no! "owno"ole!e

SS7 'ro!ocol"Den!on"



© 2007-2008 UVSC CS 479R – Telecommunca!on" an# Voce ;

/ TD6-a"e# Tran"or! !ra#!onal – 6T')

– 6T'2

– 6T'3

/ &'-a"e# Tran"or! – <!erne! &' ne!wor

– SCT'

– 63U1

/ 1lca!on 'ro!ocol" – SCC'=TC1'

– &SU'

SS7 'ro!ocol"5unc!onal D%"on"


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/ 6T') 6e""a(e Tran"er 'ar! ,ayer ) – 'y"cal layer

/ DS0 n T) or <) 1-ln+ 5-ln

/ V.3: mo#em

/ Sa!ell!e ln – ;4 >" an#w#!

/ :; >" n ?roe#-!@ T) nra"!ruc!ure

– &TU-T A.702

SS7 'ro!ocol"TD6-a"e# Tran"or!



/ 6T'2 6e""a(e Tran"er 'ar! ,ayer 2 – Da!a ,n Con!rol layer

/ <rror De!ec!on an# Correc!on CRC-);

/ 'ace! Seuencn(

/ ,n S!a!u" &n#ca!or"

– S(nal Un!"/ 5&SU 5ll-n S(nal Un!erm!" mme#a!e #e!ec!on o ln

error

/ ,SSU ,n S!a!u" S(nal Un!ro%#e" ln "!a!u" e!ween

!wo SS7 no#e"/ 6SU 6e""a(e S(nal Un!carre" (er le%el ro!ocolme""a(e"

– &TU-T A.703

SS7 'ro!ocol"TD6-a"e# Tran"or!


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– 6T'2

– 6T'3


– SCT'

– 63U1


– &SU'



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/ SCT' S!ream Con!rol Tran"m""on 'ro!ocol – Relale Tran"or!

– Da!a(ram an#=or S!ream

– Re#un#ancy

/ 6ul!le Da!a S!ream"/ 6ul!-omn( mul!le &' a##re""e"

/ 1c!%e=S!an#y

– <cency/ *o ?ea# o Aueue@ Blocn(

/ Sor! !meou!"

/ ear!ea!"

– &<T5 R5C" 29;0+ 328;+ 3309

SS7 'ro!ocol"&'-a"e# Tran"or!



/ 63U1 6T'3 U"er 1#a!a!on 'ro!ocol – 1#a!a!on o SS7 ,ayer 4 ro!ocol"=6T'3 n!erace !o

&' ne!wor !ran"or!

/ 1ear" a" 6T'3 n!erace !o ,ayer 4 ro!ocol"

/ 1ear" a" &'-a"e# alca!on !o SCT' – 6a" e!ween

/ SS7 'on! Co#e" $'C=D'C an# &' a##re""e"

/ SS7 'on! Co#e" w! Crcu! &#en!ca!on Co#e"

$'C=D'C=C&C an# &' a##re""e" o!onal

– &<T5 R5C 4;;;

SS7 'ro!ocol"&'-a"e# Tran"or!




– 6T'2

– 6T'3


– SCT'

– 63U1


– &SU'




/ SCC' S(naln( Connec!on Con!rol 'ar! – Tran"or! n!erace e!ween TC1' an# 6T'3

– Suor!" connec!onle""+ ?non-crcu!@ a"e#

me""a(e"

– Trac 6ana(emen!/ 6an!an" S(naln( 'on! S!a!u"

– 1%alal!y o 'on! Co#e" SS7 *o#e"

/ 6an!an" Su"y"!em S!a!u" – SCC' ?u"er@ a%alal!y "ecc alca!on"

/ Rerou!e" me""a(e" aroun# ale# "u"y"!em" re#un#ancy

– &TU-T A.7))-A.7);

SS7 'ro!ocol"1lca!on 'ro!ocol"


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/ TC1' Tran"ac!on Caal!e" 1lca!on 'ar! – *on-crcu! rela!e# !ran"ac!on"

– Common n!erace or !ran"ac!on-!ye alca!on"

/ Gloal T!le Tran"la!on 800+ 900 *umer"

/ ,ne &norma!on Da!aa"e ,&DB Auery/ re-lne=wrele"" ,ocal *umer 'or!al!y Auery

/ Drec!ory 1"""!ance Auery

– 'ro!ocol n!erace or alca!on-oren!e# ro!ocol"

/ &*1' &n!ell(en! *e!wor 1lca!on 'ro!ocol/ &S-4) *or! 1mercan wrele"" call con!rol ro!ocol

/ 61' 6ole 1lca!on 'ro!ocol&TU

– &TU-T A.77)-A.77:



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/ &SU' &SD* U"er 'ar! – Call Con!rol S(naln( call "e!u an# !ear#own

– *a!onal Varan!"/ &TU 88 )4-! 'C=)2-! C&C 1*S& 88 24-! 'C=)4-! C&C

/ &TU 92 )4-! 'C=)2-! C&C 1*S& 92 24-! 'C=)4-! C&C

/ &TU 9; )4-! 'C=)2-! C&C 1*S& 9; 24-! 'C=)4-! C&C

/ <TS& )4-! 'C=)2-! C&C 1*S& 2000 24-! 'C=)4-! C&C

/ BT &SU' )4-! 'C=)2-! C&C Un!e# >n(#om an# ormer colone"

/ Cna 24-! 'C=)4-! C&C1*S& 6T'3=&TU &SU'

/ TeleEnca )4-! 'C=)2-! C&C San+ 'or!u(al+ Sou! 1merca

– &TU-T A.7;)-A.7;9




/ &SU' 6e""a(e"/ &SU' Call Con!rol 6e""a(e 5low"

– Call Se!u

– Call Tear#own

SS7 'ro!ocol"Call Con!rol



/ Call Con!rol 6e""a(e" mo"! commonly u"e#

– 1C6 1##re"" Comle!e 6e""a(e – 1*6 1n"wer 6e""a(e – CCR Con!nu!y Cec Reue"! – C5* Conu"on – C$* Connec! – C$T Con!nu!y 6e""a(e

– C'G Call 'ro(re"" 6e""a(e – CRG Car(e &norma!on 6e""a(e – &16 &n!al 1##re"" 6e""a(e – &*5 &norma!on 6e""a(e – &*R &norma!on Reue"! 6e""a(e – R<, Relea"e 6e""a(e

– R<S Re"ume 6e""a(e – R,C Relea"e Comle!e 6e""a(e – S16 Su"euen! 1##re"" 6e""a(e – SUS Su"en# 6e""a(e – USR U"er-!o-U"er &norma!on

SS7 'ro!ocol"&SU' 6e""a(e"



/ Crcu! 6ana(emen! mo"! commonly u"e# – B,1 Blocn( 1cnowle#(emen!

– B,$ Blocn( – CGB Crcu! Grou Blocn( – CGB1 Crcu! Grou Blocn( 1cnowle#(emen! – CGU Crcu! Grou Unlocn( – CGU1 Crcu! Grou Unlocn( 1cnowle#(emen! – CA6 Crcu! Grou Auery – CAR Crcu! Grou Auery Re"on"e

– GRS Crcu! Grou Re"e! – GR1 Crcu! Grou Re"e! 1cnowle#(emen! – 511 5acl!y 1cce!e# – 51C 5acl!y – 51R 5acl!y Reue"! – 5$T 5orwar# Tran"er

– 5RF 5acl!y Reec! – &DR &#en!ca!on Reue"! – &RS &#en!ca!on Re"on"e – RSC Re"e! Crcu! – UB, Unlocn( – UB1 Unlocn( 1cnowle#(emen! – UC&C Uneue# Crcu! &#en!ca!on Co#e





/ 6e""a(e ?Drec!on@ Conce! – 5orwar# Drec!on

/ 6e""a(e" a""e# n !e #rec!on rom !e calln(

ar!y !o !e calle# ar!y

/ Some!me" reerre# !o a" ?#own"!ream@

– Bacwar# Drec!on

/ 6e""a(e" a""e# n !e #rec!on rom !e calle#

ar!y !o !e calln( ar!y/ Some!me" reerre# !o a" ?u"!ream@


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/ Common &SU' ea#er – 1ll &SU' me""a(e a%e common me""a(e

ea#er

/ $r(na!n( 'on! Co#e $'C – 'on! co#e o "w!c !ran"m!!n( or(nal me""a(e

/ De"!na!on 'on! Co#e D'C – 'on! co#e o "w!c n!en#e# !o rece%e me""a(e

/ Crcu! &#en!ca!on Co#e C&C – &#en!e" crcu! e!ween !ran"m!!n( "w!c an#

rece%n( "w!cH no! nece""arly !e or(nal an#

n!en#e# "w!ce"I



/ &16 &n!al 1##re"" 6e""a(e – 5orwar# me""a(e n#ca!n( "eJure o an ou!oun# crcu! an# !o

!ran"m! numer an# o!er norma!on

/ S16 Su"euen! 1##re"" 6e""a(e

– 5orwar# me""a(e n#ca!n( a##!onal calle# ar!y numer

norma!on &TU only

/ C$T Con!nu!y 6e""a(e

– 5orwar# me""a(e n#ca!n( crcu! con!nu!y !e"! " "ucce""ul

/ 1C6 1##re"" Comle!e 6e""a(e – Bacwar# me""a(e n#ca!n( all a##re"" "(nal" reure# or

rou!n( call !o calle# ar!y a%e een rece%e#




/ C'G Call 'ro(re"" 6e""a(e – Bacwar# me""a(e n#ca!n( "(ncan! e%en! a" occurre#

/ 1*6 1n"wer 6e""a(e

– Bacwar# me""a(e n#ca!n( !e calle# ar!y a" an"were#

/ R<, Relea"e 6e""a(e – 5orwar# or acwar# me""a(e n#ca!n( !e crcu! " en(

relea"e# #ue !o "ome rea"on

/ R,C Relea"e Comle!e 6e""a(e

– 5orwar# or acwar# me""a(e+ "en! n re"on"e !o a Relea"eme""a(e+ n#ca!n( !e crcu! a" een u! n!o an ?#le@

con#!on




/ SUS Su"en# 6e""a(e – 6e""a(e n#ca!n( "u"crer a" #"connec!e# an# !e call a"

een "u"en#e#

/ R<S Re"ume 6e""a(e

– 6e""a(e n#ca!n( "u"crer a" reconnec!e# an# !e call a"

een re"ume#

/ RSC Re"e! Crcu! 6e""a(e

– 6e""a(e orce" crcu! n!o ?#le@ "!a!eH cau"e" any call or crcu!

"eJure !o e !ermna!e#

/ C5* Conu"on 6e""a(e

– 6e""a(e n#ca!e" conu"on aou! me""a(e u"! rece%e#H

u"ually aen" #urn( con(e"!on or ecau"e o "o!ware u(




© 2007-2008 UVSC CS 479R – Telecommunca!on" an# Voce 2:

/ &SU' 6e""a(e"/ &SU' Call Con!rol 6e""a(e 5low"

– Call Se!u

– Call Tear#own

SS7 'ro!ocol"Call Con!rol




SS7 'ro!ocol"&16 6e""a(e 5low

CO

S&itc%

Tandem

S&itc%

CO

S&itc%

STP

Calln( C$ "w!c "en#" Initial Address Message 'IAM(

n orwar# #rec!on !o calle# C$ "w!c %a !an#em "w!ce"+ an#

eac "w!c "eJe" an ou!oun# crcu! an# connec!" !e acwar# !al a!.

Tandem

S&itc%

STP

IAM

IAM

IAM

IAM

IAM

IAM

IAM

SS C




SS7 'ro!ocol"1C6 6e""a(e 5low

CO

S&itc%

Tandem

S&itc%

CO

S&itc%

STP

Calle# C$ "w!c aler!" calle# ar!y rn(+

"en#" Address Com)lete Message 'ACM( n acwar# #rec!on !o

calln( C$ "w!c %a !an#em "w!ce"+ an# calln( C$ "w!c lay" rn(n(.

Tandem

S&itc%

STP

ACM

ACM

ACM

ACM

ACM

ACM

ACM

SS7 ' l 1*6 6 5l




SS7 'ro!ocol"1*6 6e""a(e 5low

CO

S&itc%

Tandem

S&itc%

CO

S&itc%

STP

Calle# ar!y an"wer"+ calle# C$ "w!c "en#" Ans&er Message 'ACM(

n acwar# #rec!on !o calln( C$ "w!c %a !an#em "w!ce"+

an# all "w!ce" connec! orwar# !al a!".

Tandem

S&itc%

STP

A*M

A*M

A*M

A*M

A*M

A*M

A*M




SS7 'ro!ocol"Call Tear#own 6e""a(e 5low

SS7 ' ! l R<, 6 5l



UVSC CS 479R T l ! # V 3)

SS7 'ro!ocol"R<, 6e""a(e 5low

CO

S&itc%

Tandem

S&itc%

CO

S&itc%

STP

Caller an(" u+ calln( C$ "w!c "en#" +elease Message '+$L( n orwar# #rec!on

!o calle# C$ "w!c %a !an#em "w!ce"+ an# eac "w!c "en#" +elease Com)lete

Message '+LC( n acwar# #rec!on+ #"connec!" !e !al a! an# #le" !e crcu!.

Tandem

S&itc%

STP

+$L

+$L

+$L

+$L

+$L

+$L

+$L

+LC

+LC

+LC

+LC

+LC

+LC

+LC

signaling system 7

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