Ready for the Evolution: LTE Session delivery requirements

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01/06/12 Acme Packet | www.acmepacket.com 1

Juan Luis Esteban Vice President, Solutions Architecture EMEA

All-IP networks are built differently SIP to establish communication

sessions

Diameter to manage subscriber mobility and profile data

Exploding signaling traffic Moving beyond voice - UC, RCS

messaging, collaboration

Extreme mobile data usage

Mobile device proliferation – smartphones, tablets, M2M

Increased mobility and roaming

Cost effective scaling solutions required to deal with growing signaling demands

SIPVoIPRCS

VoLTEHosted UC

DiameterAuthentication

QoSChargingMobility

2G/3G & PSTNLTE & IMS

Subscriber profile

Session

Attachment/registration

Authentication & authorization

Mobility/tracking

Authentication & authorization

Diameter Applications in LTE & IMS

Data and voice sessions

QoS & charging

Roaming

AAA, charging & QoS

Diameter Interfaces in LTE and IMS

S6aS6a

S6aS6aGxGx

Gy/GzGy/Gz

CxCxRoRo

S6dS6d

e2e2RfRf

Diameter Pain Points

Scalability and Complexity

Interoperability Challenges

Overload and Congestion

Security

Other service

providers

Outages are costly – to top line and to brand

Addresses all Diameter signaling interfaces and applications• AAA

• QoS

• Charging

Provides critical controls • Security

• Overload control

• Interoperability

• Routing & aggregation

• Reporting & analysis

Introducing Diameter Signaling Controllers

Standards compliant• RFC 3588 Diameter agent

• 3GPP Diameter Routing Agent (DRA)

• GSMA Diameter Edge Agent (DEA)

IPX/roaming

Service provider

Visited service provider

HSS, OCS, PCRF nodes

MME, PDN GW, GGSN, CSCF, AS

Diameter lacks congestion management and resource allocation provided by SS7

– Similar to the ISUP to SIP paradigm shift

– Same challenges in Signaling Control for Diameter and SIP

– Routing logic MUST be based on flexible criteria Security for Diameter signaling is key

– Hardware based encryption and Access Control

– DoS protection

– rate limiting and Overload Control Diameter Signaling Adaptations will be required

– Diameter AVP manipulations to normalize vendor implementations

– IP and transport layer interworking

Diameter Signaling Controllers are different from STPs

7Acme Packet confidential

Diameter is an IP Signaling Protocol

Two Types of DSCs: Core and Interconnect

• Voice roaming• Data roaming• Services

federationInterconnect

• Aggregation & routing

• OCS proxy• HSS/AAA proxy• PCRF proxy

3G/LTE

Core DSCs address all Diameter interfaces Online charging (OCS) – Gy, Rf, Ro QoS / policy (PCRF) – Gx, Rx Subscriber profile/AAA (HSS) – S6a, S6b,

S6d, Swm DRA 3GPP function SLF 3GPP functions Connection aggregation, routing &

load balancing Overload control Comprehensive L3-L5 interworking Reporting and analysis

Benefits Streamlined and scalable network Improved network resiliency Lower total cost of ownership Faster time to market Enhanced visibility and manageability

Core Diameter Routing Solution

Clients

Servers

Comprehensive SIP and Diameter control across roaming ecosystem I-DSC – DRA and GSMA DEA functions: S6a & S9 interfaces A-SBC – V-P-CSCF I-SBC – I-BCF/TrGW and IPX Proxy

Net-SAFE protects Diameter and SIP borders – service availability Maximize service reach – end-to-end interworking Cost effective scalability – lower TCO

VoLTE and Data Roaming Solution

SIPRTP

DataDiameter

Visited Home

Do you really have to do this???

IMS architecture Web site architecture

AS AS AS

LB-LLB-G

WS WS WS WS

IMS cloud architecture Web site architecture

AS AS AS

LB-LLB-G

WS WS WS WS

SLB-LSLB-G

SMX SMX SMXDSC

EPC IC

Integrated session delivery platform

Provides IMS access, call session control, routing and interconnect functions in single platform

Eliminates signaling complexity

Lowers total cost of ownership– CAPEX - fewer systems to

deploy– OPEX savings - easier to

certify, maintain & troubleshoot

Net-Net SIP Multimedia-Xpress simplifying IMS

versus

Integrated session delivery core based on Net-Net SBC Standard x-CSCF 3GPP IMS interfaces

IMS solution for voice, RCS(-e), FMC& multimedia services– Subscriber populations of thousands to

millions– Initial service roll-outs evolving to large

scale subscriber deployments Scaling & evolution

– Scalable Net-Net SMX – Session-aware Load Balancers

– Purpose built platforms and VM on COTS hardware

Lower total cost of ownership– CAPEX & OPEX savings - easier to

certify, maintain & troubleshoot

Acme Packet Confidential

Net-Net SMX – comprehensive VoLTE/RCSe solution

eUTRAN

FTTxxDSLCable

Enterprise

Fixed Access

ENUM/DNS

Service & applications data centers(IMS/NGN)

IP peer

Mg, Mj

SBCSBC

Database ServerLayer

Application ServerLayer

ControlLayer

Load BalancerLayer

Deploying IMS in WEB-like way

Data center

IP peer

Internet

Acme Packet solutionstransform mobile network

RCSRCS-e

FMC IPX

SIP interconnect

Small cells

LTEroaming

Diameter routing

Additional Resources

• Blog Post: IMS World Forum 2012 Clouds in the IMS Fields

• Blog Post: The Next Generation Signaling Core for LTE and IMS

• White Paper: Scaling Diameter in LTE and IMS

Ready for the Evolution: LTE Session delivery requirements

Technology