Impact of Carrier ENUM on Intl Traffic Delivery Mikael Schachne Belgacom ICS

Impact of Carrier ENUM on International Traffic DeliveryMobile World Congress - ENUM Seminar18th February 2009, BarcelonaMikaël SchachneHead of Data Product ManagementBelgacom ICS Belgacom ICS Confidential

Agenda • Belgacom ICS at a glance • Carrier Services Overview & Evolution • Routing Options & Challenges • Assessing the ENUM Benefits • What’s Next? Belgacom ICS Confidential

About Belgacom ICS Belgacom ICS Confidential

09-Feb-24 Belgacom ICS Confidential 5

Belgacom ICS Confidential

12% Capacity 18% Mobile Data 43% Voice Outsourcing Voice Hubbing 27%Belgacom ICS Confidential

Carrier Services Overview & Evolution Belgacom ICS Confidential

Carrier Services• 1 agreement with the Hub (AA.7x & AA.8x)• 1 technical connection Multilateral• 1 financial relation• 1 IREG & TADIG tests Hub Provider QoS Voice Roaming SMS & MMS Testing & Transit Hubbing Hubbing Monitoring Rest of World Bilaterals Roaming or Interworking Partners Extend footprint through a single interface Belgacom ICS Confidential

Evolution of technologies Past (TDM) FIX/Mobile PSTN MMS SMS Current Softswitch Internet Evolution GRX VoIP (Hybrid) FIX Mobile TDM IP PSTN Future IPX Proxy 3 GPP All VoIP/DSL VoIP IPv6 IPv6 / IMS09-Feb-24 Belgacom ICS Confidential 10

Why Embracing NGN Technologies? Introduce new services Cost Reduction Routing Flexibility & Scalability Quality (reduce transcoding & SPOF) Convergence SS7 Call Control Processors E1 SIP/IMS Line Card Switching NGN Line Card Matrix IP09-Feb-24 Belgacom ICS Confidential

The IPX Model IP INTERWORKING FABRIC Multilateral & open for MNOs, FNOs and ISPs Enables cascading of payments & E2E SLAs in a secured environment1209-Feb-24 Belgacom ICS Confidential

The IPX Road • 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 services09-Feb-24 Belgacom ICS Confidential

IPX Challenges • 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 Belgacom ICS Confidential

Routing Options & Challenges Belgacom ICS Confidential

Traditional SS7 Interworking SS7 SS7 STP routing STP Control plane STP Control plane MNO A MNO B User plane User plane MG W MSS MSS MG W Voice Switch SMS Hub Roaming Hub 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 Interconnections usually performed via Carriers Belgacom ICS Confidential

Packet Voice Interworking SIP-I TCP/UDP/SCTP IP L2,L1 IPX Control plane Control plane MNO A MNO B User plane User planeMSS MG W PVI Provider MG W MSS Codec RTP UDP OP L2,L1 Problem of SIP-I interworking if no MNP solution is available Belgacom ICS Confidential

MNP Impact • 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 & MNOs09-Feb-24 Belgacom ICS Confidential

SIP-I Interworking with MNP Option a: MNO2 forwards call to MNO3 BG BG MNO1 IPX1 IPX2 MNO2 user plane BGMobile customer +32474xx SS7 control planecalls +393930xxx TDM MNP DB Option b: IPX2MNO1 routes the call towards the terminates call to MNO3“number owning network” MNO2 MNO3 Ported-in MNO C subscriber +397870xxx Direct MNP access, Call Forwarding & HLR Lookup as only options Belgacom ICS Confidential

Routing with ENUM Belgacom ICS Confidential

Interworking with ENUM BG MNO1 IPX1 IPX2 MNO2 user plane control plane BGMobile customer +32474xx MNPcalls +393930xxx SIP Redirect or DNS queryMNO1 routes the call towards the“number owning network” MNO2 MNP DB MNO3 ENUM Tier 0 MNP DB Option a: Redirection to country Option b: MNP level ENUM DB Operators providing DB ENUM Tier 1 Ported Numbers Ported-in MNO C subscriber +397870xxx Routing performed after ENUM lookup Traffic terminated directly by IPX to correct destination network Belgacom ICS Confidential

ENUM Benefits • 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-efficient09-Feb-24 Belgacom ICS Confidential

What’s next ? Belgacom ICS Confidential

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

Thank you! www.belgacom‐ics.com Belgacom ICS Confidential

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Belgacom ICS Confidential

Impact of Carrier ENUM on Intl Traffic Delivery Mikael Schachne Belgacom ICS

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Impact of Carrier ENUM on Intl Traffic Delivery Mikael Schachne Belgacom ICS Presentation Transcript