Registering a SIP Resource Priority Header Field Namespace for Local Emergency Communications
RFC 7135
Document | Type |
RFC - Informational
(May 2014; No errata)
Was draft-polk-local-emergency-rph-namespace (individual in rai area)
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Author | James Polk | ||
Last updated | 2015-10-14 | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Reviews | |||
Stream | WG state | (None) | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 7135 (Informational) | |
Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Robert Sparks | ||
Send notices to | Brian.Rosen@neustar.biz |
Internet Engineering Task Force (IETF) J. Polk Request for Comments: 7135 Cisco Systems Category: Informational May 2014 ISSN: 2070-1721 Registering a SIP Resource Priority Header Field Namespace for Local Emergency Communications Abstract This document creates the new Session Initiation Protocol (SIP) Resource Priority header field namespace 'esnet' and registers this namespace with IANA. The new header field namespace allows for local emergency session establishment to a public safety answering point (PSAP), between PSAPs, and between a PSAP and first responders and their organizations. Status of This Memo This document is not an Internet Standards Track specification; it is published for informational purposes. This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Not all documents approved by the IESG are a candidate for any level of Internet Standard; see Section 2 of RFC 5741. Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc7135. Copyright Notice Copyright (c) 2014 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Polk Informational [Page 1] RFC 7135 Emergency RPH Namespace May 2014 Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 2 2. Rules of Usage of the Resource Priority Header Field . . . . . 4 3. "esnet" Namespace Definition . . . . . . . . . . . . . . . . . 6 3.1. Namespace Definition Rules and Guidelines . . . . . . . . 6 3.2. The 'esnet' Namespace . . . . . . . . . . . . . . . . . . 6 4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 7 4.1. IANA Resource-Priority Namespace Registration . . . . . . 7 4.2. IANA Priority-Value Registrations . . . . . . . . . . . . 7 5. Security Considerations . . . . . . . . . . . . . . . . . . . 8 6. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 8 7. Normative References . . . . . . . . . . . . . . . . . . . . . 9 1. Introduction This document creates the new Session Initiation Protocol (SIP) Resource Priority header (RPH) field namespace 'esnet' for local emergency usage and registers this namespace with IANA. The SIP Resource-Priority header field is defined in RFC 4412 [RFC4412]. The new 'esnet' namespace is to be used for inbound calls towards a public safety answering point (PSAP), between PSAPs, and between a PSAP and first responders or their organizations within managed IP networks. This namespace is not for use on the open public Internet because it can be trivially forged. Adding an RPH with the 'esnet' namespace can be differentiated from the marking of an emergency call using a service URN as defined in [RFC5031] in that the RPH specifically requests preferential treatment in networks that honor it, while the marking merely identifies an emergency call without necessarily affecting resources allocated to it. It is appropriate to use both where applicable. RPH with 'esnet' may also be used within public safety networks for SIP sessions that are not emergency calls and thus not marked per RFC 5031. This new namespace is included in SIP requests to provide an explicit priority indication within controlled environments, such as an IP Multimedia Subsystem (IMS) infrastructure or Emergency Services network (ESInet) where misuse can be reduced to an acceptable level because these types of networks have controls in place. The function facilitates differing treatment of emergency SIP requests according to local policy, or more likely, a contractual agreement between the network organizations. This indication is used solely to differentiate certain SIP requests, transactions, or dialogs from other SIP requests, transactions, or dialogs that do not have the need for priority treatment. If there are differing, yet stillShow full document text