Enabling Roaming in the LTE Era

Wanderlust: Enabling roaming in the LTE era

The future is all IP Internet

IMS

Other IP networks

SS7 over TDM

SS7 over IP (BICC/ SIGTRAN)

Diameter & SIP over IP

PCRF

EPC

EPS

Core

PSTN

NGN

IMS

RAN

2G

3G

LTE

20012010

2011-

P-GW

S-GW 4G LTE/M-WiMAX eUTRAN MME

19902000

eNodeB

LTE All services IMS/SIP services Data services Diameter Mobility tracking

Acme Packet

2 Page

Roaming architecture changes with LTE

Acme Packet

3G

LTE

Switching

Circuit

Packet

Voice bearer

TDM voice

Packet voice

Roaming signaling (policy exchange)

MAP/CAP

Diameter

Subscriber data

HLR

HSS

Session Signaling SS7/ISUP

SIP

QoS element

PCRF

n/a

LTE roaming overview 1. Attachment procedure 2. Authentication procedure 3. Update location procedure 4. Subscriber data retrieval procedure

5. QoS policy exchange

Roaming border Visited network MME 1

Attach

2

Authenticate

Home network PCRF

PCRF 2

Authenticate

3

Update Location

Subscriber Data Policy exchange Acme Packet

5

HSS

4

Diameter-based subscriber profile exchange is IMS and LTE Subscriber authentication

Data centers

Core transport

EPC

Access

Acme Packet

Admission control, QoS, charging

eUTRAN

eUTRAN

Diameter signaling challenges Visited service provider

Interoperability

Security

Scalability

Network complexity & cost Acme Packet

Home service provider

New product emerges: Diameter signaling controllers •

Addresses all Diameter signaling interfaces and applications •

Authentication

•

Location/mobility

•

QoS

•

Charging

•

Clients

Servers

Agents

Routing Request Security

Mediation

Reque st

Congestion control

LTE data & VoLTE roaming

Monitoring & reporting

Response

Load balancing

•

Provides critical signaling controls that reduce costs, accelerate time to market and assure availability •

Security

•

Traffic control

•

Interoperability & mediation

• •

Standards compliant •

RFC 3588 Diameter agent

Routing & aggregation

•

3GPP Diameter Routing Agent (DRA)

Reporting & analysis

•

GSMA Diameter Edge Agent (DEA)

Acme Packet

7

DSCs support broad set of applications OTT/ Web

Edge

• Voice roaming • Data roaming • Services federation

IPX

MNO

MNO

Service provider

Core Acme Packet

• Aggregation & routing • OCS proxy • HSS/AAA proxy • PCRF proxy

HSS, OCS, PCRF nodes

MME, PDN GW, GGSN, CSCF, AS

8

Diameter signaling controllers – key benefits •

Expedites time to market – – – –

•

Secures roaming borders – – –

•

Diameter signaling rate limiting Hides topology from roaming partners Confidentiality of roaming information

Enables new business model: Over the top services with QoE – –

•

Real-time resolution of Diameter interoperability Provides visibility for planning and troubleshooting Select and interoperate best of breed products Simplifies scaling

QoS and transport controls over broadband network New revenue stream

Enables wholesale hubbing of LTE roaming services – –

IPX carriers provide multilateral roaming interconnection Complement SIP and SIP-I interconnects

Acme Packet

Operator session delivery will be IMS

GSMA Leads Mobile Industry Towards a Single Global Solution for Voice over LTE “…a

single, IMS-based voice solution for next-generation Mobile Broadband networks”

February 2010 Acme Packet

VoLTE roaming options • Home routed with data backhaul to home network (existing data model) • Distributed policy control with policy interfaces • Visited P-CSCF with policy control in visited network (selected by GSMA IR.92) • Visited services with IMS core in visited network Home Routed

Distributed Policy Control

Visited P-CSCF

Visited Services

Home network H-PCRF

PCRF

H-PCRF

V-PCRF

Visited network Acme Packet

V-PCRF

PCRF

LTE roaming solution must encompass all services & entire ecosystem SIP & Diameter

MNOs & IPX

Visited

Voice & data Home

IPX

LTE

LTE

SIP RTP

Visited P-CSCF

Data Diameter

DRA

Acme Packet

I-BCF/TrGW 12

12

Net-Net •

Diameter is the key IP signaling roaming protocol Service provider

•

•

Diameter signaling controllers provide security, routing, interoperability functions

HSS, OCS, PCRF nodes

IPX/ roaming hub

MME, PDN GW, GGSN, CSCF, AS

Visited service provider

VoLTE roaming requires additional SIP controls

Acme Packet

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