Framework for Supporting Emergency Telecommunications Service (ETS) in IP Telephony
RFC 4190
|
| Document |
Type |
|
RFC - Informational
(November 2005; No errata)
|
|
Last updated |
|
2015-10-14
|
|
Stream |
|
IETF
|
|
Formats |
|
plain text
pdf
html
bibtex
|
| Stream |
WG state
|
|
(None)
|
|
Document shepherd |
|
No shepherd assigned
|
| IESG |
IESG state |
|
RFC 4190 (Informational)
|
|
Consensus Boilerplate |
|
Unknown
|
|
Telechat date |
|
|
|
Responsible AD |
|
Jon Peterson
|
|
Send notices to |
|
<kimberly.s.king@saic.com>
|
Network Working Group K. Carlberg
Request for Comments: 4190 G11
Category: Informational I. Brown
UCL
C. Beard
UMKC
November 2005
Framework for Supporting
Emergency Telecommunications Service (ETS) in IP Telephony
Status of This Memo
This memo provides information for the Internet community. It does
not specify an Internet standard of any kind. Distribution of this
memo is unlimited.
Copyright Notice
Copyright (C) The Internet Society (2005).
Abstract
This document presents a framework for supporting authorized,
emergency-related communication within the context of IP telephony.
We present a series of objectives that reflect a general view of how
authorized emergency service, in line with the Emergency
Telecommunications Service (ETS), should be realized within today's
IP architecture and service models. From these objectives, we
present a corresponding set of protocols and capabilities, which
provide a more specific set of recommendations regarding existing
IETF protocols. Finally, we present two scenarios that act as
guiding models for the objectives and functions listed in this
document. These models, coupled with an example of an existing
service in the Public Switched Telephone Network (PSTN), contribute
to a constrained solution space.
Carlberg, et al. Informational [Page 1]
RFC 4190 IP Telephony Framework November 2005
Table of Contents
1. Introduction ....................................................2
1.1. Emergency Related Data .....................................4
1.1.1. Government Emergency Telecommunications
Service (GETS) ......................................4
1.1.2. International Emergency Preparedness Scheme (IEPS) ..5
1.2. Scope of This Document .....................................5
2. Objective .......................................................7
3. Considerations ..................................................7
4. Protocols and Capabilities ......................................7
4.1. Signaling and State Information ............................8
4.1.1. SIP .................................................8
4.1.2. Diff-Serv ...........................................8
4.1.3. Variations Related to Diff-Serv and Queuing .........9
4.1.4. RTP ................................................10
4.1.5. GCP/H.248 ..........................................11
4.2. Policy ....................................................12
4.3. Traffic Engineering .......................................12
4.4. Security ..................................................13
4.4.1. Denial of Service ..................................13
4.4.2. User Authorization .................................14
4.4.3. Confidentiality and Integrity ......................15
4.5. Alternate Path Routing ....................................16
4.6. End-to-End Fault Tolerance ................................17
5. Key Scenarios ..................................................18
5.1. Single IP Administrative Domain ...........................18
5.2. Multiple IP Administrative Domains ........................19
6. Security Considerations ........................................20
7. Informative References .........................................20
Appendix A: Government Telephone Preference Scheme (GTPS) .........24
A.1. GTPS and the Framework Document ..........................24
Appendix B: Related Standards Work ................................24
B.1. Study Group 16 (ITU) .....................................25
Acknowledgements ..................................................26
1. Introduction
The Internet has become the primary target for worldwide
communications in terms of recreation, business, and various
imaginative reasons for information distribution. A constant fixture
in the evolution of the Internet has been the support of Best Effort
as the default service model. Best Effort, in general terms, implies
that the network will attempt to forward traffic to the destination
as best as it can, with no guarantees being made, nor any resources
reserved, to support specific measures of Quality of Service (QoS).
Show full document text