4541-role of diameter in lte roaming interoperability

8/11/2019 4541-Role of Diameter in LTE Roaming Interoperability

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GSMA 2013

Role of Diameter in LTE Roaming & Interoperability

Authentication, Mobility Management & Session Control


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GSMA 2013

LTE Roaming is Coming.


3/18

GSMA 2013

Reference Example

Operator A(HomeNetwork)Operator B(VisitedNetwork)

4G Coverage Area4G Coverage Area


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GSMA 2013

Roaming Architecture 1

AF is in the IMS Network (PDN)

SIP (Mw) communication occurs through a GRE tunnel over the S8 interface (not shown in the

diagram for simplicity)

Mobility

ServiceSubscriber

Data

Policy Control Service

Local

Anchor

PointExternal

Network

Gateway

Border

Gatew

ay

Diameter

Edge

Device


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GSMA 2013

Roaming Architecture 2

AF is in the respective IMS Network (PDN)

SIP (Mw) communication occurs through a GRE tunnel over the S8 interface (not shown in the

diagram for simplicity)


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GSMA 2013

Prevalence of Diameter in EPS What We Have Seen

So Far

S6a S6d S13

Gx Rx S9

Authentication & Mobility Management

Session Management

S1-U S8

Interfaces using Diameter

Interfaces using GTP

S1-MME

SGi

Interface to the External World

S13


7/18 GSMA 2013

Routing & Edge Functions in a Network (PLMN/IPX)


8/18 GSMA 2013

Core v/s Edge Functions

Core Edge

Charging

System


9/18 GSMA 2013

Roaming Deployment Modes

Mobile Operator 2

IPX-DRA

IPX Provider

Mobile Operator 1Mobile Operator 3

Mobile Operator 4

In this example Mobile Operator 1 and 2 have a direct roaming agreement

Mobile Operator 3 and 4 have a direct roaming agreement

All other signaling for roaming is enabled by the IPX Provider

Connectivity

Interoperability Routing & Load Balancing


10/18 GSMA 2013

Reference Example Revisited: Introducing Legacy

Interworking


3GCoverage Area4GCoverage Area


4GCoverage Area3GCoverage Area


11/18 GSMA 2013

3G Subscriber Moving into 4G Coverage Area

PCEF PCEF

S6a, S13 S6d, S13 Gy

SGSN SGSN MME MME

HPLMN

(3G)

VPLMN(4G)

Gf

EIR EIR

Ge

Prepaid

SCP

Prepaid

SCP

Gr

HLR HLR

TCAP (SS7)

Diameter

IWF


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GSMA 2013

4G Subscriber Moving into 3G Coverage Area

Gr ,Gf, Ge

SGSN SGSN

HPLMN

(4G)

VPLMN(3G)

Gy

OCS OCS

S6d, S13

HSS HSS

Diameter

IWF

TCAP (SS7)


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GSMA 2013

Voice Roaming: PS/CS Voice Interworking 1

Reference: GSMA IR.65: IMS Roaming & Interworking Guidelines

No IPX Provider

Role of Diameter:PCC for Voice Call in

SP As network

Diameter Interfaces:Rx, Gx, Gz

IWFrequired


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GSMA 2013

Voice Roaming: PS/CS Voice Interworking 2

Role of Diameter:Same as in previous slide

Reference: GSMA IR.65: IMS Roaming & Interworking Guidelines


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GSMA 2013

Non-3GPP Access Roaming Architecture 1

Reference: 3GPP TS 23.402: Architecture enhancements for non-3GPP accesses

hPCRF

HSS

TrustedNon-3GPP IP

Access

PDNGateway

HPLMN

SWd

Non-3GPPNetworks

VPLMN

vPCRF

3GPP AAAProxy

STa

3GPP AAAServer

S2a

Gxa

S9

SGi

Gx

S6b

Operator's IPServices

(e.g. IMS, PSS

RxSWx

SWn

ePDG

SWa

UntrustedNon-3GPP IP

Access

SWm

S2b

GxbGxc

S8

S6a

3GPPAccess

ServingGateway

Home Routed


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GSMA 2013

Non-3GPP Access Roaming Architecture 2

Reference: 3GPP TS 23.402: Architecture enhancements for non-3GPP accesses

Local Breakout

hPCRF

HSS

TrustedNon-3GPP IP

Access

HPLMN

SWd

Non-3GPPNetworks

S6b

VPLMN

vPCRF

PDNGateway

3GPP AAAProxy

3GPP AAAServer

Gxa

S9

S2a

Gx

Rx

SGi

SWx

STa

Visited network IPservices or proxiesto home networkservices or PDN

Rx

Gxb

ePDGS2b

SWn

SWm

UntrustedNon-3GPP IP

Access SWa

S5

Gxc

S6aOperator's IP

Services(e.g. IMS, PSS

3GPPAccess

ServingGateway


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GSMA 2013

Prevalence of Diameter in EPS A Holistic Picture

Some Non -3GPP Ac cess Roamin g Scenar ios Have Not B een Represented

S6a S6d S13

Gx Rx S9

Authentication & Mobility Management

Session Management

S1-U S8Interfaces using Diameter

Interfaces using GTP

S1-MME

SGi

Interface to the External World

S13

Swx

STaSWa

SWm S6b

SWd

Gxb Gxc

S2a S2b

Interfaces using PMIP

Gy Gz


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GSMA 2013

Diametriq, LLC

Thank You

4541-role of diameter in lte roaming interoperability

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