IPDV Draft ietfippmipdv03'txt

1
IPDV Draft ltietf-ippm-ipdv-03.txtgt

• Phil Chimento
• Centre for Telematics and Information Technology
• University of Twente
• Enschede, The Netherlands

2
Changes in the new draft

• Discontinuous Sample definition deleted
• Old discussion of IPDV mean value deleted
• New section added to try to clarify
• New section on relationship with other standards
  added
• Short section on security added

3
Some discussion points

• Components of Delay (and variation)
• Access delay
• Transmission delay
• Propagation delay
• Nodal delay
• Queueing delay
• What does delay variation really measure ?

4
Some Discussion Points (cont)

• Pair-wise delay variation
• vs.
• Change in delay
• Note
• pairwise delay variation is small
• total variation can be large

5
Some questions

• Key question
• What do you want to use IPDV for ?
• Jitter estimation ?
• Jitter in the EE sense
• Jitter in the Comp Sci sense
• Sizing buffers ?
• Traffic characterization ?
• Estimation of queueing delay ?