SCCP%20User%20Adaptation%20Layer

1
SCCP User Adaptation Layer

• 49th IETF Meeting San Diego, CA
• draft-ietf-sigtran-sua-04.txt
• John A. Loughney
• john.loughney_at_nokia.com

2
What's New?

• Current version is draft-ietf-sigtran-sua-04.txt
• Added back the SCON message.
• Cleaned-up TLV format
• IANA Extensibility added
• Added suggestion for Source/Destination
  address(still need to resolve the exact format
  for this).
• Added section on Message Routing Scenarios
• Editorial Concerns

3
Issues to Discuss

• Segmenting/Reassembly within SUA
• SG manditory to do this
• Inactivity Test (connection-oriented procedure)
• Add
• SUA Message Routing Issues
• Routing Keys for SUA only SSN and network
  appearance?
• Use of Network Appearance is incomplete. May
  have some problems in a multi-network
  environment.
• Clean-up appendicies. Are the needed?

4
Nature of the Networks (IP vs. SS7)

• The role of the SG and the different addressing
  mechanisms available to SUA is an issue.
• Two options
• Make SCCP management SS7 addressing transparent
  to SUA. Only the SG processes Point Codes and
  handles SCCP Management messages.
• Some applications/implemenations may wish to
  allow SCCP management messages and SS7-like
  provisioning.
• Resolution allow point two, but allow them to be
  MAY or SHOULD rather than MUST. (If the SG
  "knows" the provisioning of the IPSPs, then it is
  optional to send the SCCP Management messages).

5
Source / Destination Address

• Source / Destination Address Header
• 0 1 2
  3
• 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2
  3 4 5 6 7 8 9 0 1
• -----------------------
  ---------
• Tag 0x0103
  Parameter Length
• -----------------------
  ---------
• Routing Indicator Address
  Indicator
• -----------------------
  ---------
• /
  /
• \ address parameters
  \
• -----------------------
  ---------
• TLV structures for the address
• Global Title
• PC
• SSN
• IPv4 Address
• IPv6 Address
• Host Name

6
Wrap Up

• Next Draft to cover major issues
• (attempt to get it out next week)
• One more draft to cover editorial issues and
  clean-up text.
• Ready for Last Call?
• Interest in an SUA Bakeoff (April 2001)?