IANA Registering a SIP Resource Priority Header Field Namespace for Local Emergency Communications
draft-polk-local-emergency-rph-namespace-03

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Document Type Active Internet-Draft (individual in rai area)
Last updated 2013-02-11
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Send notices to jmpolk@cisco.com, draft-polk-local-emergency-rph-namespace@tools.ietf.org, Brian.Rosen@neustar.biz
Network Working Group                                        James Polk
Internet-Draft                                            Cisco Systems
Expires: August 8, 2013                                 February 8,2013
Intended Status: Informational 

          IANA Registering a SIP Resource Priority Header Field
              Namespace for Local Emergency Communications
               draft-polk-local-emergency-rph-namespace-03

Abstract

   This document creates the new Session Initiation Protocol (SIP) 
   Resource Priority header field namespace "esnet" for local emergency
   usage to a public safety answering point (PSAP), between PSAPs, and 
   between a PSAP and first responders and their organizations, and 
   places this namespace in the IANA registry.

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Polk                       Expires Aug 8, 2013                 [Page 1]
Internet-Draft SIP Resource-Priority for Local Emergencies January 2013

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .  2
   2.  Rules of Usage of the Resource Priority Header  . . . . . . .  3
   3.  "esnet" Namespace Definition  . . . . . . . . . . . . . . . .  5
     3.1   Namespace Definition Rules and Guidelines . . . . . . . .  5
     3.2   The "esnet" Namespace . . . . . . . . . . . . . . . . . .  5
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  6
     4.1   IANA Resource-Priority Namespace Registration . . . . . .  6
     4.2   IANA Priority-Value Registrations . . . . . . . . . . . .  6
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .  6
   6.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  7
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  7
     7.1   Normative References  . . . . . . . . . . . . . . . . . .  7
     7.2   Informative References  . . . . . . . . . . . . . . . . .  7
       Author's Address  . . . . . . . . . . . . . . . . . . . . . .  8

1.  Introduction

   This document creates the new Session Initiation Protocol (SIP) 
   Resource Priority header (RPH) field namespace "esnet" for local 
   emergency usage and places this namespace in the IANA registry.  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 a RPH with the "esnet" namespace can be differentiated from 
   the marking of an emergency call using a service urn as defined in 
   RFC 5031 in that the RPH specifically requests preferential 
   treatment in networks which 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 IMS infrastructure or Emergency Services network (ESInet) where 
   misuse can be reduced to a minimum because these types of networks 
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