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©Tieto Corporation 2
CONNECTIVITY EXPERIENCE IN ALL DIMENSIONS
#1 Telecom R&D
In Europe
>25 years
of Signaling
experience
World-wide
customer base
>500 Signaling
experts
©Tieto Corporation 3
TIETO ARE LONG TERM EXPERTS IN SIGNALING
World class
signaling
products for all
connectivity
needs
Full Range
of Professional
Services
Deep
signaling
expertise
Long term
commitment
and
partnership
©Tieto Corporation 5
4G/LTE Network Signaling
Diameter Signaling Controller
LTE ROAMING
V-PCRF
MME
DEA
Diameter Edge Agent GSMA IR-88
DRA Diameter
Routing Agent 3GPP TS 29.213
SGW
MME
PCRF
PGW
(PCEF)
GGSN
EIR
Diameter Load
Balancer
DA Diameter Agent
RFC 3588
SGSN
HSS
HOME MOBILE NETWORK
OCS
OFCS
©Tieto Corporation 6
LTE traffic complexity and traffic explosion
Number of
devices
growth
Mobile traffic
growth
Number of
users
growth
Tieto
Virtualized Diameter Signaling Controller
Services
and legacy
integration
©Tieto Corporation 7
Impact of NFV cloud on Diameter signaling.
Challenges for scalable Diameter routing in the cloud.
Diameter in NFV cloud
©Tieto Corporation 8
• EPC/IMS functions (nodes) are considered to be Virtual Network Functions in the ETSI NFV architecture
• Dynamic use of resources and the ability to upscale/downscale VNF resources and resize ”clusters” of VNFs must be transparent
• Multi vendor environment should be supported by the infrastructure
• Load balancers are components for building a cloud solution
• Lower level of load balancers are part of the NFV infrastructure
EPC/IMS in NFV
VNF
(E.g. PCRF)
VNFC
VNFC VNFC
VNFC
©Tieto Corporation 9
• 3GPP defined control signaling protocols used in EPC/IMS (e.g. Diameter and SIP) are:
• Point to point protocols
• Multiple users share the same peer to peer connection.
• Users are identified by logical information within the protocols
• EPC/IMS protocol aware load balancers are essential for building and cloud solution
Handling control plane traffic in NFV
Session 1
Session n
…
Common peer connection
©Tieto Corporation 10
• Diameter enabled VNFs require Diameter aware load balancers:
• Re-distribute load in a controlled way to support VNF’s dynamic behaviour
• Dynamically adding/removing peers to a VNF pool
• Perform topology hiding
• Session aware
• Provide essential security
Diameter Load Balancers in NFV
VNF
(PCEF)
VNF
(Diameter LB)
VNF
(OCS)
Orchestrator
VNF
(PCEF)
VNF
(Diameter LB)
VNF
(OCS)
©Tieto Corporation 11
• Controllable from a Cloud Orchestrator
• Performs load distribution
• Provides input and statistics to orchestrator
• Protect peers from overload
• Provide an overview of network status
Diameter Signaling Controller in NFV
©Tieto Corporation 12
• Have the future architecture in mind when designing your network today
• Many of the Diameter load balancing and routing features are very useful, regardless if NFV is used or not
• Early introduction gives you an opportunity to learn and provide feedback to suppliers that will benefit when moving into the cloud
Be prepared!
©Tieto Corporation 14
• Ensure monetization of existing network equipment
• Ability to adapt to any type of Diameter flavor
• Provide service continuity over network borders
• Enable roaming between operators/networks
Importance of Mediation & Interworking
Diameter Mediation
GW
SS7
MAP/CAP SS7
LEGACY
OPERATOR
HLR
EIR
SSF
WIFI
PROVIDER
RADIUS
LDAP
SOAP
HSS
3G/4G
OPERATOR
MME
OCS
PCRF
DIAMETER
©Tieto Corporation 15
• 2G/3G subscriber with LTE device visiting an LTE network
• MAP-Diameter Interworking according to 3GPP TS 29.305
Case 1: Connection to 2G/3G HLR and EIR
MME
HLR
IWF MAP-Diameter Gateway
S6a+S13
Gr
EIR
Gf
SGSN
S6d+S13’
Diameter MAP/SS7
©Tieto Corporation 16
• Provide WiFi access for 3G/4G subscribers
Case 2: Service continuity across networks
WLAN
Access
Diameter
Gateway RADIUS
HSS
Diameter
S6
Support
Server
SOAP
HLR MAP
Gr
©Tieto Corporation 17
• Diameter is by nature extensible and causes issues
• Diameter Mediation solves this problem
Case 3: Diameter translation & mediation
DPI Diameter
Mediator
Diameter
Gx’
Diameter
Gx PCRF
©Tieto Corporation 18
• Common prepaid charging system for 4G, 3G and 2G • One single instance for prepaid charging
• Reduce charging traffic
• Less maintenance cost and complexity
• Simplified maintenance
Case 4: Multi-network charging
MSC
CAP-Diameter
Interworking
Diameter
Gy OCS
SGSN
CAP/SS7
©Tieto Corporation 19
• Support for multiple interfaces/protocols
• Ability to map and modify parameters between protocols
• Possibility to “chain” operations
• Easily and live configurable
• Easily adaptable to new situations/scenarios
• Carrier Grade solution
• Virtualization support (NFV)
Requirements for Diameter Mediation
©Tieto Corporation 20
• ANY TO ANY protocol interworking
• Integration enablement WITHIN HOURS OR DAYS
• ADVANCED service logic
• WIDE RANGE OF IT, LEGACY AND DIAMETER PROTOCOLS
• POWERFUL flow creation environment
• Fully CONFIGURABLE INTERWORKING
• ON-THE-FLY updates
• NFV ready – running on COTS servers
Tieto Diameter Mediation Gateway
Diameter Mediation Gateway
Changing perspectives
Jörgen Tränk
Strategic Product Manager
Tieto, Signaling Products