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ENUM Trial in France Sophie Coste-Martinez

ENUM Trial in France Sophie Coste-Martinez. Outline. ENUM in France Expectations Numerobis ENUM administration Functional model Service requirements and constraints DNS analysis Trial steps Conclusion. ENUM in France.

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ENUM Trial in France Sophie Coste-Martinez

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  1. ENUM Trial in FranceSophie Coste-Martinez

  2. Outline • ENUM in France • Expectations • Numerobis • ENUM administration • Functional model • Service requirements and constraints • DNS analysis • Trial steps • Conclusion

  3. ENUM in France • May 2001: public consultation initiated by the the National Regulation Authority • June 2001: creation of a national working group on ENUM • February 2002: call for a trial project • March 2002: project proposal • May 2002: proposal accepted ￫ Numerobis • February 2003: start of Numerobis project • Numerobis project is running until September 2004

  4. Expectations • Numerobis main objectives: • To develop an administration model for ENUM in France • To open the model for services provision by ASPs • To identify services requirements and constraints • To take into account Number Portability • To explore different choices of DNS-related techniques • To implement an ENUM platform in order to validate the defined model

  5. Numerobis (characteristics) • A RNRT project (French National Network for Research in Telecommunications) • Different categories of partners: • University (INT) • TSPs (fixed: FT and mobile: SFR, Orange) • ccTLD Registry: AFNIC (.fr) • ENUM technology oriented • Experimentation but no commercial offer • Advanced analysis on DNS-related techniques • Keeping a close eye on the trends of standardization • Trial uses 3.3.e164.arpa and reserved numbering blocks

  6. ENUM administration (issues) • Common agreement (ENUM national WG) • ENUM domain names administration should be mapped on E.164 numbers administration • No ENUM Domain names commercialization • Competition regards services provision • Tier2 is the entity who has contracted with the end user for the telephone subscription • TSPs or mandated third entities handle the ENUM domain names database • Guaranties • Consistency with the numbering plan • No need for a validation entity (validation is internal and simple)

  7. Technical Manager Technical Manager Tier 2: Complete number 0 TSP … Profiles Profiles Profiles Profiles Profiles Service Provider B Service Provider A ASPs … End users ENUM administration e164.arpa Tier 0: root (ENUM reference) France 3.3. Tier 1: CC authority ?

  8. e164.arpa. Tier0 Administrative Manager Tier0 Technical Manager 3.3. Tier1 Administrative Manager Tier1 Technical Manager ...B.A.Z. Database : national numbering plan allocation Tier2 Administrative Manager Tier2 Technical Manager U.D.C.M.Q.P.B.A.Z. Case of portability Case of portability New Tier2 Technical Manager New Tier2 Administrative Manager ...B.A.Z. New Tier2 Technical Manager New Tier2 Administrative Manager Tier2 Administrative Manager Tier2 Technical Manager U.D.C.M.Q.P.B.A.Z. ASP End user Functional Model Interfaces : International interface Delegation and Management Administrative, commercial Technical (NAPTR update) Administrative (Portability) Technical (NAPTR update)

  9. Services: requirements and constraints (1/2) • Objective  • To identify a representative services panel • To derive these services' requirements • Benchmark services • Conversational services • Messaging: email, SMS, MMS • Web • Streaming • Directory services • Constraints • Load supported by DNS servers • Delay caused by DNS interrogation • Zone updates • Availability • ….

  10. DNS ENUM MSC Resolver 1 HLR VLR Services: requirements and constraints (2/2) Related constraints • Service case Internet 3 GSM GW 2 IP 4 6 7 5 message messag VoIP service provider VoIP to GSM Call

  11. DNS analysis • User ENUM = public DNS on the Internet • Issues regarding privacy: no confidentiality, spam,… • Serious concerns for different constraints • Solutions may reside in services • DNSsec : • A solution for authentication and data integrity, but not for confidentiality • Increase time for data updating, responses • Impact on data organization • Implementations are still non mature • Still thinking about its potential use in ENUM

  12. Trial steps • Current • DNS infrastructure recommendations for Tier1 and Tier2 entities • Domain Name Servers being setup • ENUM resolver design • Enumservices used: E2U+sip, E2U+h323… • Next steps • ENUM resolver implementation • Administrative procedures • Architecture validation • DNS simulator

  13. Conclusion • Numerobis project added values: • An experience on ENUM technology • Guidelines for future ENUM administration and implementation in France • Contribution to standards • More info : http://www.numerobis.prd.fr/

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