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An Extension to the Session Initiation Protocol (SIP) for Request History Information (RFC4244)

IP.com Disclosure Number: IPCOM000131930D
Original Publication Date: 2005-Nov-01
Included in the Prior Art Database: 2005-Nov-22
Document File: 45 page(s) / 99K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

M. Barnes: AUTHOR [+2]

Abstract

This document defines a standard mechanism for capturing the history information associated with a Session Initiation Protocol (SIP) request. This capability enables many enhanced services by providing the information as to how and why a call arrives at a specific application or user. This document defines a new optional SIP header, History-Info, for capturing the history information in requests.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 3% of the total text.

Network Working Group                                     M. Barnes, Ed.
Request for Comments: 4244                                        Nortel
Category: Standards Track                                  November 2005


         An Extension to the Session Initiation Protocol (SIP)
                   for Request History Information

Status of This Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2005).

Abstract

   This document defines a standard mechanism for capturing the history
   information associated with a Session Initiation Protocol (SIP)
   request.  This capability enables many enhanced services by providing
   the information as to how and why a call arrives at a specific
   application or user.  This document defines a new optional SIP
   header, History-Info, for capturing the history information in
   requests.

Table of Contents

   1. Introduction ....................................................2
      1.1. Overview ...................................................2
      1.2. Conventions Used in This Document ..........................3
      1.3. Background:  Why define a Generic "Request History"
           capability? ................................................3
   2. "Request History" Requirements ..................................4
      2.1. Security Requirements ......................................6
      2.2. Privacy Requirements .......................................7
   3. Request History Information Description .........................7
      3.1. Optionality of History-Info ................................8
      3.2. Securing History-Info ......................................8
      3.3. Ensuring the Privacy of History-Info .......................9
   4. Request History Information Protocol Details ....................9
      4.1. Protocol Structure of History-Info ........................10
      4.2. Protocol Examples .........................................11
      4.3. Protocol Usage ............................................12

Barnes                      Standards Track                     [Page 1]
RFC 4244            SIP Request History Information        November 2005


           4.3.1. User Agent Client (UAC) Behavior ...................12
           4.3.2. User Agent Server (UAS) Behavior ...................13
     ...