{"draft":"draft-ietf-sipping-reason-header-for-preemption-04","doc_id":"RFC4411","title":"Extending the Session Initiation Protocol (SIP) Reason Header for Preemption Events","authors":["J. Polk"],"format":["ASCII","HTML"],"page_count":"22","pub_status":"PROPOSED STANDARD","status":"PROPOSED STANDARD","source":"Session Initiation Proposal Investigation","abstract":"This document proposes an IANA Registration extension to the Session\r\nInitiation Protocol (SIP) Reason Header to be included in a BYE Method\r\nRequest as a result of a session preemption event, either at a user\r\nagent (UA), or somewhere in the network involving a reservation-based\r\nprotocol such as the Resource ReSerVation Protocol (RSVP) or Next\r\nSteps in Signaling (NSIS).  This document does not attempt to address\r\nrouters failing in the packet path; instead, it addresses a deliberate\r\ntear down of a flow between UAs, and informs the terminated UA(s) with\r\nan indication of what occurred.  [STANDARDS-TRACK]","pub_date":"January 2006","keywords":["Resource-Priority","preempt","preempted","Q.850","preconditions"],"obsoletes":[],"obsoleted_by":[],"updates":[],"updated_by":[],"see_also":[],"doi":"10.17487\/RFC4411","errata_url":null}