2_001 lte_epc overview (technical part) - interconnectivity.ppt

7/27/2019 2_001 LTE_EPC Overview (Technical part) - Interconnectivity.ppt

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LTE/EPC Technical overview

Interconnectivity


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Introduction


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Why learn about epcInterconnectivity

EPS = LTE + EPC.EPS standart: 3GPP release 8

Reuse existing equipment !requen"ies and sites.

Core Network

Non-3GPP

CS net#$r%s

&'P net#$r%s&

3G

(G

Circuit Core

IMS domain

EPCeUTRAN

User mgmt


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Scope and objectives

)es"ri*e te LTE,EPC

ar"ite"ture

)es"ri*e te 'ntera"ti$n #it

"urrent net#$r%

'denti!- te EPC n$des and

des"ri*e teir !un"ti$ns

List all te EPC inter!a"es and

des"ri*e in detail teir pr$t$"$lsta"%.

$ll$# EPC atta"ment and

sessi$n a"ti/ati$n step *- step

Objecties

0/er/ie#

Eri"ss$n inter!a"es

'nitial 1tta"Sessi$n 1"ti/ati$n

Sco!e


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> Overview


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LTE/epc architecture

P"N G#

Ser G#

PCR$

%TE

S1-MME S1-U

S11

S5/S8

SGi

Gx

E&terna'IP net(or)s Rx

X2

*SS

IMS

MME

eN+

SASN

P)2 G

Ser/ G

PCR

%TE

S1-MME S1-U

S10

S11

S5/S8

SGi

X2

S6a

44E

eN+

S1S2

5SS

SGi

Gx

Rx

eNode+6 Ce'' resource management6 +roadcast in,ormation6 MME se'ection6 Trans,er o, trans!arent NAS signa''ing6 Routing o, user data to(ards te S-G#6 Intra-%TE andoer. inter-MME !oo' andoer

initiation. inter-RAT andoer initiation6 /oS rea'i0ation

6 Securit1

*SS6Maintain and !roide subscri!tion

data6User Identi,ication and'ing6Access Autorisation6Proide 2e1s ,or Autentication6and Encr1!tion6User Registration management6Maintain )no('edge o, used P"N G#

MME

6Autentication6NAS signa''ing6G# se'ection6Roaming S4a to ome *SS56+earer management6Id'e mode trac)ing6Paging6Inter-MME and IRAT mobi'it16NAS Ci!ering and Integrit1

!rotection

S G# !art6In isited net(or) in case o, roaming6Intra-%TE mobi'it1 ancor6Pac)et routing 6 ,or(arding6%a(,u' interce!t6%TE id'e mode "% bu,,ering6Carging !er UE. P"N and /CI6+earer bindings ,or PMIP S78S9

PCR$

6 Proides Serice "ata$'o( gating6 Set /oS ,or eac Serice

"ata $'o(6 "e,ine Carging ,or eac Serice

"ata $'o(6 Enab'es +earer /oS Contro'6 Corre'ation bet(een A!!'ication

and +earer carging6 Noti,ication o, bearer eents to

a!!'ication ,unction

6 +earer bindings to(ards Ser-G#,or PMIP based S7

P"N G# !art6E&terna' IP !oint o, interconnect6IP address a''ocation6Pac)et routing 6 ,or(arding6%a(,u' iterce!t6Po'ic1 en,orcement

6In ome or isited net(or)

SASN6Pac)et Ins!ection and

Serice C'assi,ication6Credit contro'6/ua'it1 o, Serice contro'6Content ,i'tering6Access contro'6Po'ic1 contro'6Content enricment6Tra,,ic redirection6Usage records6Securit1


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Ericsson interaces


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LTE/EPC interaces

P"N G#

Ser G#

PCR$

S1-MME S1-U

S11

S5/S8

SGi

Gx


*SS

IMS

MME

S1-MME S1-U

S11

S5/S8

SGi

X2X2%TE

eN+

%TE

SGi

Gx

S10

SASN

PCR$

*SS

SASN

PCR$

*SS

SASN

PCR$

*SS

Ser G#

SASN

PCR$

*SS

MME Ser G#

SASN

PCR$

*SS


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LTE/epc interaces

P"N G#

Ser G#

PCR$

S1-MME S1-U

S10

S11

S5/S8

SGi

Gx

E&terna'IP net(or)s

Rx

*SS

IMS

S6a

MME

S1-MME S1-U

S10

S11

S5/S8

SGiS6a

X2X2%TE

eN+

%TE

eN+

SGi

Gx

S6aS6a

S10

S6aS6a

S10S10

S11

SASNSASN

Ser G#

SASN

PCR$

SASN

Ser G#


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LTE/epc interaces

P"N G#

Ser G#

PCR$

S1-MME S1-U

S10

S11

S5/S8

SGi

Gx


*SS

IMS

S6a

MME

S1-MME S1-U

S10

S11

SGiS6a

X2X2%TE

eN+

%TE

eN+

SGi

Gx

Rx

S6aS6a

S10

:; Inter,ace

Connects

neigboring

eNode+s

'P

L(

L7

)PSCTP

GTP9(91P

S6aS6a

S10S10

S11

SASN

PCR$

*SS

SASN

PCR$

*SS

P"N G#

SASN

PCR$

*SS


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Initial attach


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Initial attach

P"N G#

Ser G#

PCR$

%TE

S1-MME S1-U

S10

S11

S5/S8

SGi

Gx


X2

*SS

IMS

S6a

MME

eN+

SASN

P)2 G

Ser/ G

PCR

%TE

S1-MME S1-U

S10

S11

S5/S8

SGi

X2

S6a

44E

eN+

S1S2

5SS

SGi

Gx

Rx


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Session activation


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Session activation

P"N G#

Ser G#

PCR$

%TE

S1-U

S10

S11

S5/S8

SGi

Gx


X2

*SS

IMS

S6a

MME

eN+

SASN

P)2 G

Ser/ G

PCR

%TE

S1-MME S1-U

S10

S11

S5/S8

SGi

X2

S6a

44E

eN+

S1S2

5SS

SGi

Gx

Rx


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!Su""ary


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$%I&


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$ui'

7; e2$de"$rre"t;

(; Te S77 inter!a"e is used !$r:

a; C$ntr$l plan signalling "reate and delete EPS *earers >"$rre"t;

*; C$nne"t SG# t$ P)2 G#

"; Trans!erring rel$"ati$n in!$rmati$n *et#een 44Es

d; ?$S "$ntr$l


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$ui'

3; at is te !un"ti$n $! te P)2 Gate#a-:a; Pr$/ide user plane tunneling

*; 5andle "$ntr$l plane signalling *et#een E9TR12 and 44E

"; Send 21S messages t$ 44E

d; 5andle pa"%et r$uting and 'P address all$"ati$n >"$rre"t;

@; GTP/(9C messages are "arried $/er #i" inter!a"e

a; S7944E

*; S77

"; S7A >"$rre"t;

d; SGi


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$ui'

B; Te 1tta" pr$"edure is initiated *-:a; E >"$rre"t;

*; e2$de$r gl$*all- unique temp$rar- identit-

EPC EPC S7 44E S744E

44E 44E TE') TE') >$r >tunnel end9p$int identi!ier;

5SS 5SS C)41 #ide*and C)41

SRF SRF 1P2 1P2

E9TR12 Eutran S1CC sa"C

P)2 G P)2 gate#a- ?$S qualit- $! ser/i"e

PCR PCR P)P P)P

'PS 'PS LTE,EPC LTEEPC

21S 21S GS4 GS4SGS2 SGS2 Rx R

S7 1P S71P SGi SG'

GGS2 GGS2 'P/@ 'P /ersi$n @

GPRS GPRS '4S' imsi

SGS2944E SGS244E )2S )2S

GTP GTP E9R1< ER1$r S1PC; TSP TSP

S1S2 sas2 >$r S1S2; E user equipment >$r >E;

S1E G S1E gate#a- 4SER multi9ser/i"e edge r$uter >$r 4SER;

Gx G S921PTR S21TPR

'P 'P S9G ser/ing gate#a-

P4'P P4'P 'PS 'PS

G gate#a- 'R1T irat

)L )L ?C' ?C'

S7A sten 1 1

S79 S7 ?)2 ?)2

2_001 lte_epc overview (technical part) - interconnectivity.ppt

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