Extended RTP Profile for Real-time Transport Control Protocol (RTCP)-Based Feedback: Results of the Timing Rule Simulations
RFC 4586
| Document | Type |
RFC - Informational
(July 2006; Errata)
Was draft-burmeister-avt-rtcp-feedback-sim (individual in tsv area)
|
|
|---|---|---|---|
| Last updated | 2015-10-14 | ||
| Stream | IETF | ||
| Formats | plain text pdf htmlized with errata bibtex | ||
| Stream | WG state | (None) | |
| Document shepherd | No shepherd assigned | ||
| IESG | IESG state | RFC 4586 (Informational) | |
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Allison Mankin | ||
| Send notices to | <csp@csperkins.org>, <magnus.westerlund@ericsson.com> | ||
Network Working Group C. Burmeister
Request for Comments: 4586 R. Hakenberg
Category: Informational A. Miyazaki
Panasonic
J. Ott
Helsinki University of Technology
N. Sato
S. Fukunaga
Oki
July 2006
Extended RTP Profile for
Real-time Transport Control Protocol (RTCP)-Based Feedback:
Results of the Timing Rule Simulations
Status of This Memo
This memo provides information for the Internet community. It does
not specify an Internet standard of any kind. Distribution of this
memo is unlimited.
Copyright Notice
Copyright (C) The Internet Society (2006).
Abstract
This document describes the results achieved when simulating the
timing rules of the Extended RTP Profile for Real-time Transport
Control Protocol (RTCP)-Based Feedback, denoted AVPF. Unicast and
multicast topologies are considered as well as several protocol and
environment configurations. The results show that the timing rules
result in better performance regarding feedback delay and still
preserve the well-accepted RTP rules regarding allowed bit rates for
control traffic.
Burmeister, et al. Informational [Page 1]
RFC 4586 Timing Rules Simulation Results July 2006
Table of Contents
1. Introduction ....................................................3
2. Timing Rules of the Extended RTP Profile for RTCP-Based
Feedback ........................................................4
3. Simulation Environment ..........................................5
3.1. Network Simulator Version 2 ................................5
3.2. RTP Agent ..................................................5
3.3. Scenarios ..................................................5
3.4. Topologies .................................................6
4. RTCP Bit Rate Measurements ......................................6
4.1. Unicast ....................................................7
4.2. Multicast .................................................10
4.3. Summary of the RTCP Bit Rate Measurements .................10
5. Feedback Measurements ..........................................11
5.1. Unicast ...................................................11
5.2. Multicast .................................................12
5.2.1. Shared Losses vs. Distributed Losses ...............13
6. Investigations on "l" ..........................................14
6.1. Feedback Suppression Performance ..........................16
6.2. Loss Report Delay .........................................18
6.3. Summary of "l" Investigations .............................18
7. Applications Using AVPF ........................................19
7.1. NEWPRED Implementation in NS2 .............................19
7.2. Simulation ................................................21
7.2.1. Simulation A - Constant Packet Loss Rate ...........21
7.2.2. Simulation B - Packet Loss Due to Congestion .......23
7.3. Summary of Application Simulations ........................24
8. Summary ........................................................24
9. Security Considerations ........................................25
10. Normative References ..........................................26
11. Informative References ........................................26
Burmeister, et al. Informational [Page 2]
RFC 4586 Timing Rules Simulation Results July 2006
1. Introduction
The Real-time Transport Protocol (RTP) is widely used for the
transmission of real-time or near real-time media data over the
Internet. While it was originally designed to work well for
multicast groups in very large scales, its scope is not limited to
that. More and more applications use RTP for small multicast groups
(e.g., video conferences) or even unicast (e.g., IP telephony and
media streaming applications).
RTP comes together with its companion protocol Real-time Transport
Control Protocol (RTCP), which is used to monitor the transmission of
the media data and provide feedback of the reception quality.
Furthermore, it can be used for loose session control. Having the
scope of large multicast groups in mind, the rules regarding when to
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