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Requirements, Terminology and Framework for Exigent Communications

Document type: Expired Internet-Draft (atoca WG)
Document stream: IETF
Last updated: 2012-09-13 (latest revision 2012-03-12)
Intended RFC status: Unknown
Other versions: (expired, archived): plain text, pdf, html

IETF State: WG Document
Document shepherd: No shepherd assigned

IESG State: Expired
Responsible AD: (None)
Send notices to: No addresses provided

This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found here:


Before, during and after emergency situations various agencies need to provide information to a group of persons or to the public within a geographical area. While many aspects of such systems are specific to national or local jurisdictions, emergencies span such boundaries and notifications need to reach visitors from other jurisdictions. This document provides terminology, requirements and an architectural description for protocols exchanging alerts between IP-based end points.


Henning Schulzrinne <>
Steve Norreys <>
Brian Rosen <>
Hannes Tschofenig <>

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid)