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DCCP User GuideDCCP User Guide

draft-ietf-dccp-user-guide-01.txtdraft-ietf-dccp-user-guide-01.txt

Tom Phelan – Sonus NetworksTom Phelan – Sonus Networkstphelan@sonusnet.comtphelan@sonusnet.com

4-March-20044-March-2004

http://www.phelan-4.com/dccp/DCCP-UG-Seoul.ppthttp://www.phelan-4.com/dccp/DCCP-UG-Seoul.ppt

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User Guide OverviewUser Guide Overview

Focus on app strategies for using DCCP, not on DCCP API

Intro – candidate apps, choosing a CCID

App stories – streaming media and interactive games

Stupid DCCP tricks – useful features of DCCP

Security Considerations – useful security features

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User Guide IssuesUser Guide Issues

My take on potential controversies in guide:

Fast restart Guide assumes 8 packets/RTT after idle This didn’t make it into CCID3 rev

Training period in strategy 3 Post-dial delay problems? Just doesn’t work?

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User Guide Issues (2)User Guide Issues (2)

Stream switching Not acceptable to users?

Variable rate media 10x frame-to-frame variations just can’t be supported

Stream padding Don’t transmit more than maximum encoding rate When at lower encoding, pad to TFRC rate

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User Guide Issues (3)User Guide Issues (3)

TFRC with self-limiting sources Boy, do we need some simulations

Restart after idle for games Not going to work?

More apps Detail for media and games – do we need

more apps?

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User Guide Issues (4)User Guide Issues (4)

Stupid DCCP tricks: PMTUD with DCCP-Sync packets App-level partial reliability App-level sequencing with DCCP sequence

numbers App-level flow control with Slow Receiver

Option Detecting lost data with NDP