ENUM Trial in France Sophie CosteMartinez

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ENUM Trial in France Sophie Coste-Martinez
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Outline

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

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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

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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

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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

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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)

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ENUM administration
e164.arpa
Tier 0 root (ENUM reference)
France
3.3.
Tier 1 CC authority
?
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Functional Model

• Interfaces
• International interface
• Delegation and Management
• Administrative, commercial
• Technical (NAPTR update)
• Administrative (Portability)
• Technical (NAPTR update)

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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
• .

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Services requirements and constraints (2/2)

• Service case

Related constraints
Internet
3
GSM
GW
2
IP
4
6
7
5
message
messag
VoIP service provider
VoIP to GSM Call
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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

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Trial steps

• Current
• DNS infrastructure recommendations for Tier1 and
  Tier2 entities
• Domain Name Servers being setup
• ENUM resolver design
• Enumservices used E2Usip, E2Uh323
• Next steps
• ENUM resolver implementation
• Administrative procedures
• Architecture validation
• DNS simulator

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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/