3GPP%20ad-hoc%20report

1
3GPP ad-hoc report

• IETF 53, March 2002
• Miguel A. Garcia
• mailtomiguel.a.garcia_at_ericsson.com

2
Path header

• Actually, two problems, one general, the other
  not so much.
• Currently split into two proposals
• http//www.softarmor.com/sipwg/drafts/draft-willis
  -sip-path-02.html
• http//www.softarmor.com/sipwg/drafts/draft-willis
  -sip-svcrtdisco-00.html

3
Privacy

• Several aspects mixed
• Network requested privacy
• User requested privacy
• Desire to not involve a B2BUA for every session
• Desire to not use anonymous in From and To for
  all sessions
• Not a clear resolution yet

4
Dialled URL

• Requirement is proxy sends the UAS the users
  own SIP URL
• Maybe a small piece of a more generic problem
  (history)
• A solution via P- header seems feasible in the
  short term

5
3GPP XML body to P- headers

• P-Cell-ID
• P-3GPP-Charging
• P-Access-Type
• P-Visited-Network-ID
• P-Called-Party-ID

6
Security

• AKA in HTTP-Digest,
• draft-niemi-sipping-digest-aka-00.txt
• Integrity Protection. Two options
• HTTP-Digest extension
• IPSec
• SIP security agreement,
• draft-arkko-sip-sec-agree-01.txt