Belgacom ICS Confidential
Impact of Carrier ENUM on International Traffic Delivery
Mobile World Congress - ENUM Seminar18th February 2009, BarcelonaMikaël SchachneHead of Data Product Management Belgacom ICS
Belgacom ICS Confidential
• Belgacom ICS at a glance
• Carrier Services Overview & Evolution
• Routing Options & Challenges
• Assessing the ENUM Benefits
• What’s Next?
Agenda
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About Belgacom ICSAbout Belgacom ICS
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Belgacom ICS Confidential
Belgacom ICS Confidential
27%
18%
12%
43%CapacityMobile DataVoice OutsourcingVoice Hubbing
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Carrier Services Overview & EvolutionCarrier Services Overview & Evolution
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Roaming or Roaming or Interworking Interworking
PartnersPartners
• 1 agreement with the Hub (AA.7x & AA.8x)
• 1 technical connection
• 1 financial relation
• 1 IREG & TADIG tests
Multilateral
Bilaterals
Rest of WorldRest of World
Extend footprint through a single interfaceExtend footprint through a single interfaceExtend footprint through a single interface
Roaming Hubbing
QoS Testing &
Monitoring
SMS & MMS Hubbing
Carrier Services
Voice Transit
Hub Provider
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GRX
Past(TDM)
Future IPX Proxy3 GPP
VoIP/DSL IPv6 IPv6
SMSMMS
InternetCurrentEvolution(Hybrid)
IP
Softswitch
FIX/Mobile PSTN
VoIP
PSTN
FIXMobileTDM
All VoIP / IMS
Evolution of technologies
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Introduce new services
Cost Reduction
Routing Flexibility & Scalability
Quality (reduce transcoding & SPOF)
Convergence
Line
Car
d
Line
Car
dSwitchingMatrix
Call Control ProcessorsSS7
E1
IP
NGNSIP/IMS
Why Embracing NGN Technologies?
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IP INTERWORKING FABRICIP INTERWORKING FABRIC
The IPX Model
Multilateral & open for MNOs, FNOs and ISPsMultilateral & open for MNOs, FNOs and ISPs Enables cascading of payments & E2E SLAs in a secured environmenEnables cascading of payments & E2E SLAs in a secured environmentt
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• Commercial IPX will start mid 2009
• PVI (Packet Voice Interworking) is the main driver for 2009. SIP-I driven.
• GRX & MMS will be integrated into IPX• Market evolving towards IP and new IMS services
• Existing services (Voice)• New services (IM, Video/Image Sharing, PoC, Gaming)
• Create new Revenues via new services and new type of SPs
• Opportunity to develop new Hubbing services
The IPX Road
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• IPX is new : prove the telecom world that it can work
• SIP URI Routing & MNP
• Introduce E2E & IP Quality of Service
• Setup monitoring architecture (KPI/SLA)
• Vendors SIP-I support & interoperability in general. Devil is in the details.
• Charging validation
IPX Challenges
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Routing Options & ChallengesRouting Options & Challenges
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User plane
Control plane
TDM TDM• Interconnection still based on SS7 for user and control plane• Release 4 architecture not relevant for IP interconnection• Relying on HLR Interrogation & MSISDN Routing Tables
MNO A MNO B
Interconnections usually performed via CarriersInterconnections usually performed via Carriers
SS7 SS7
MGW MGW MSSMSS
Traditional SS7 Interworking
User plane
Control planeSTP
Voice Switch SMS HubRoaming Hub
routingSTP STP
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User plane
Control plane
MNO A MNO B
Problem of SIPProblem of SIP--I interworking if no MNP solution is availableI interworking if no MNP solution is available
MGW MGW MSSMSS
Packet Voice InterworkingSIP-I
TCP/UDP/SCTPIP
L2,L1
Codec RTPUDPOP
L2,L1
PVI Provider
IPX
User plane
Control plane
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• Wrong route selection • Operator might not be able to send traffic• Hub could terminate traffic to wrong destination• Risk of undelivered traffic if no solution available on
terminating party• Could lead to asymmetrical routing• Troubleshooting complexity• Increase loop risk• Billing issues between hubs & MNOs
MNP Impact
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SIP-I Interworking with MNP
user planecontrol plane
IPX2MNO1 MNO2IPX1
MNO3
SS7TDM
BG
BGBG
Option a: MNO2 forwards call to MNO3
Option b: IPX2 terminates call to MNO3
Mobile customer +32474xxcalls +393930xxx
Ported-in MNO C subscriber +397870xxx
MNO1 routes the call towards the “number owning network” MNO2
Direct MNP access, Call Forwarding & HLR Lookup as only optionsDirect MNP access, Call Forwarding & HLR Lookup as only options
MNPDB
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Routing with ENUMRouting with ENUM
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Interworking with ENUM
user planecontrol plane
IPX2MNO1 MNO2IPX1
MNO3
MNPBG
BG
Mobile customer +32474xxcalls +393930xxx
Ported-in MNO C subscriber +397870xxx
MNO1 routes the call towards the “number owning network” MNO2
Routing performed after ENUM lookup Routing performed after ENUM lookup Traffic terminated directly by IPX to correct destination networTraffic terminated directly by IPX to correct destination networkk
MNPDB
ENUM Tier 0 MNPDB
MNPDB
SIP Redirect or DNS query
Option b: Operators providing Ported NumbersENUM Tier 1
Option a: Redirection to countrylevel ENUM DB
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• Standardized solution for MNP
• Direct routing
• Transparency• Facilitate symmetrical routing• Security thanks to policy-based ENUM access• Accurate Billing & Reporting
• Open to IPX, MNOs, FNOs and xSPs
• Cost-efficient
ENUM Benefits
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WhatWhat’’s next ?s next ?
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Going Forward
• IPX is taking shape and should embrace any carrier services
• MNP solution is required for any services
• ENUM as ideal but solution also required for countries without centralized MNP DB
• Assessment of all available options within relevant WG/bodies
• Migration to ENUM under reasonable timeline
• Solution required in hybrid environment
• Consensus required to define architecture and business models in all scenarios
• Connect to ALL MNP DBs
Belgacom ICS Confidential