ENUM-based Softswitch Requirement <draft-lim-kim-enum-based-softswitch-01.txt>

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ENUM-based Softswitch Requirementltdraft-lim-kim-
enum-based-softswitch-01.txtgt

• 19 Mar. 200768th IETF Prague, Czech
• JoonHyung Lim(jhlim_at_nida.or.kr)
• National Internet Development Agency of Korea
• (NIDA, former KRNIC)

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This Draft is

• Advisory
• Not defined any standard material
• Providing a experience to help implementers
• Results of KR(82) Infra ENUM trial
• Evaluated the service quality between ENUM and
  Non-ENUM
• Still individual draft

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Changes since ver.00

• Major changes
• Changed status of draft to informational
• Added new sections for KR trial details
• Diagram of trial system in section 3
• Trial Result in section 5
• Added specific implementation for softswitch
  using Rcode and routing method
• Editorial changes
• Re-arranging order and re-naming the title of
  entire sections

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Requirement for ENUM-based softswitch (limited on
KR trial)

• Routing path selection depending on Rcode
• Rcode scenario implemented on trial system
• To route a call based on domain name, it can use
• Fixed routing table embedded on softswitch
• Efficient for limited access among carriers based
  on previous agreement
• External Recursive DNS
• Efficient for unlimited access among carriers

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Trial Results

• Only difference between ENUM and Non-ENUM
  softswitch is the location where call routing
  information stored
• Delay time can be a issue for performance
• Answer Delay Time defined as elapsed time
  between requesting a call('INVITE') and
  receiving a response('200OK)
• There is little difference in time(under a sec)
  between ENUM and Non-ENUM case. Therefore a
  caller of each carrier is hard to recognize the
  difference as aspect of quality when a call
  initiates.

Answer Delay Time (sec)
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Still comments needed

• Can this draft contribute to WG by means
  providing Infra ENUM experience?
• Comments needed what if this draft going to make
  further progress (i.e. WG draft and so on.)
• Isnt there any necessity to work on practical
  Path selection issue can be adopted on device
  widely ?

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Thank you!Q/A