Adaptive Header ComprEssion (ACE) for Real-Time Multimedia
draft-ietf-rohc-rtp-ace-00
| Document | Type |
Replaced Internet-Draft
(rohc WG)
Expired & archived
|
|
|---|---|---|---|
| Authors | Christopher Clanton , Haihong Zheng , Khiem Le , Zhigang Liu | ||
| Last updated | 2000-05-25 | ||
| Replaced by | draft-ietf-rohc-rtp | ||
| RFC stream | Internet Engineering Task Force (IETF) | ||
| Intended RFC status | (None) | ||
| Formats | |||
| Additional resources | Mailing list discussion | ||
| Stream | WG state | WG Document | |
| Document shepherd | (None) | ||
| IESG | IESG state | Replaced by draft-ietf-rohc-rtp | |
| Consensus boilerplate | Unknown | ||
| Telechat date | (None) | ||
| Responsible AD | (None) | ||
| Send notices to | (None) |
This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:
Abstract
When Real-Time Multimedia over IP is applied to cellular systems, it is critical to minimize the overhead of the IP/UDP/RTP header, as spectral efficiency is a top requirement. Robustness to errors and error bursts is also a must. Existing IP/UDP/RTP header compression schemes such as that presented in IETF RFC 2508 [CRTP], do not provide sufficient performance in such environments. This report describes a new scheme (ACE, or Adaptive header ComprEssion) , which like RFC 2508, is based on the idea that most of the time IP/UDP/RTP fields are either constant or can be extrapolated in a linear fashion. However, ACE incorporates several additional concepts which enable it to provide excellent compression efficiency (exceeds the performance of [CRTP]) along with a high degree of error-resiliency. Some of the concepts employed, such as Variable Length Encoding (VLE), enable ACE to adapt to changing behavior in the IP/UDP/RTP header fields, such that good efficiency and robustness characteristics are maintained over a wide range of operating conditions. ACE is a general framework that can be parameterized to account for the existence/non-existence and performance characteristics of the feedback channel. Thus, ACE is applicable over both bi-directional and unidirectional links. ACE is also able to perform a seamless handoff, i.e. the scheme can resume efficient compression operation immediately after handoff.
Authors
Christopher Clanton
Haihong Zheng
Khiem Le
Zhigang Liu
(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)