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01/06/12 Acme Packet | www.acmepacket.com 1
Ready for the Evolution: LTE Session delivery requirements
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
SS7
SIPVoIPRCS
VoLTEHosted UC
DiameterAuthentication
QoSChargingMobility
2G/3G & PSTNLTE & IMS
Subscriber profile
Session
Attachment/registration
Authentication & authorization
Mobility/tracking
Authentication & authorization
3
Diameter Applications in LTE & IMS
Data and voice sessions
QoS & charging
Roaming
AAA, charging & QoS
4
Diameter Interfaces in LTE and IMS
S6aS6a
RxRx
S6aS6aGxGx
Gy/GzGy/Gz
GxGx
CxCxRoRo
e2
ShSh
S6dS6d
S9S9
e2e2RfRf
Diameter Pain Points
Scalability and Complexity
Interoperability Challenges
Overload and Congestion
Security
IMS
EPC
Other service
providers
Outages are costly – to top line and to brand
5
6
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
hub
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
8
Two Types of DSCs: Core and Interconnect
• Voice roaming• Data roaming• Services
federationInterconnect
• Aggregation & routing
• OCS proxy• HSS/AAA proxy• PCRF proxy
Core
IPX
MNO
3G/LTE
EPC
IMS
MNO
9
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
10
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
LTE
IPX
LTE
Visited Home
Do you really have to do this???
IMS architecture Web site architecture
DBDB
AS AS AS
LB-LLB-G
WS WS WS WS
IMS cloud architecture Web site architecture
DBDB
AS AS AS
LB-LLB-G
WS WS WS WS
DBDB
AS AS
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
14
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
15
eUTRAN
LTE
FTTxxDSLCable
Enterprise
Fixed Access
EPC
Rx
e2
Rf
Cx
ISC
Gm Gm
Rx/Rq
ENUM/DNS
Service & applications data centers(IMS/NGN)
PSTN
IP peer
Mg, Mj
Ici
SBCSBC
Database ServerLayer
Application ServerLayer
ControlLayer
Load BalancerLayer
Deploying IMS in WEB-like way
16
Data center
PSTN
IP peer
Internet
Acme Packet solutionstransform mobile network
AT&T
RCSRCS-e
FMC IPX
SIP interconnect
VoLTE
Small cells
LTE
LTEroaming
IMS
Diameter routing
18
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