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Tunneling Multiplexed Compressed RTP (TCRTP) (RFC4170)

IP.com Disclosure Number: IPCOM000131723D
Original Publication Date: 2005-Nov-01
Included in the Prior Art Database: 2005-Nov-17
Document File: 25 page(s) / 49K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

B. Thompson: AUTHOR [+3]

Abstract

This document describes a method to improve the bandwidth utilization of RTP streams over network paths that carry multiple Real-time Transport Protocol (RTP) streams in parallel between two endpoints, as in voice trunking. The method combines standard protocols that provide compression, multiplexing, and tunneling over a network path for the purpose of reducing the bandwidth used when multiple RTP streams are carried over that path.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 6% of the total text.

Network Working Group                                        B. Thompson
Request for Comments: 4170                                      T. Koren
BCP: 110                                                         D. Wing
Category: Best Current Practice                            Cisco Systems
                                                           November 2005


             Tunneling Multiplexed Compressed RTP (TCRTP)

Status of This Memo

   This document specifies an Internet Best Current Practices for the
   Internet Community, and requests discussion and suggestions for
   improvements.  Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2005).

Abstract

   This document describes a method to improve the bandwidth utilization
   of RTP streams over network paths that carry multiple Real-time
   Transport Protocol (RTP) streams in parallel between two endpoints,
   as in voice trunking.  The method combines standard protocols that
   provide compression, multiplexing, and tunneling over a network path
   for the purpose of reducing the bandwidth used when multiple RTP
   streams are carried over that path.

Thompson, et al.         Best Current Practice                  [Page 1]
RFC 4170          Tunneling Multiplexed Compressed RTP     November 2005


Table of Contents

   1. Introduction ....................................................3
      1.1. Is Bandwidth Costly? .......................................3
      1.2. Overview of Protocols ......................................3
      1.3. Document Focus .............................................4
      1.4. Choice of Enhanced CRTP ....................................4
      1.5. Reducing TCRTP Overhead ....................................4
   2. Protocol Operation and Recommended Extensions ...................4
      2.1. Models .....................................................5
      2.2. Header Compression: ECRTP ..................................5
           2.2.1. Synchronizing ECRTP States ..........................5
           2.2.2. Out-of-Order Packets ................................6
      2.3. Multiplexing: PPP Multiplexing .............................6
           2.3.1. PPP Multiplex Transmitter Modifications for
                  Tunneling ...........................................7
           2.3.2. Tunneling Inefficiencies ............................8
      2.4. Tunneling: L2TP ............................................8
           2.4.1. Tunneling and DiffServ ..............................9
      2.5. Encapsula...