wdiff rfc8101.original rfc8101.txt

Network Working Group
Internet Engineering Task Force (IETF) C. Holmberg
Internet-Draft
Request for Comments: 8101 J. Axell
Intended status:
Category: Informational Ericsson
Expires: July 24, 2017 January 20,
ISSN: 2070-1721 March 2017

IANA Registration of New Session Initiation Protocol (SIP) Resource-
Priority
Resource-Priority Namespace for Mission Critical Push To Talk service
draft-holmberg-dispatch-mcptt-rp-namespace-05 Service

Abstract

This document creates an additional Session Initiation Protocol (SIP)
Resource-Priority namespace namespaces to meet the requirements of the 3GPP
defined
3GPP-defined Mission Critical Push To Talk, Talk (MCPTT) and places this namespace these
namespaces in the corresponding IANA registry.

Status of This Memo

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This Internet-Draft will expire on July 24, 2017.
http://www.rfc-editor.org/info/rfc8101.

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Table of Contents

1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Applicability . . . . . . . . . . . . . . . . . . . . . . . . 3
3. New SIP Resource-Priority Namespaces Created . . . . . . . . 3
3.1. Introduction . . . . . . . . . . . . . . . . . . . . . . 3
3.2. The MCPTT namespaces Namespaces . . . . . . . . . . . . . . . . . . 3
4. Security Considerations . . . . . . . . . . . . . . . . . . . 4 5
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 5
6. Acknowledgments . . . Normative References . . . . . . . . . . . . . . . . . . . . 5
7. Change Log . . . . . . . . . . . . . . . . . .
Acknowledgments . . . . . . . 5
8. Normative References . . . . . . . . . . . . . . . . . . . . 5 6
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 6

1. Introduction

The Third Generation Partnership Project (3GPP) has defined a Mission
Critical Push To Talk (MCPTT) over LTE service [TS.3GPP.22.179] . [TS.3GPP.22.179]. The
MCPTT service supports an enhanced PTT service, Push To Talk (PTT) service that is
suitable for mission critical scenarios, scenarios and is based upon 3GPP
Evolved Packet System (EPS) services. The requirements for the MCPTT
service defined within 3GPP can also form the basis for a non-mission critical Push To Talk (PTT)
service. other PTT
services.

The MCPTT service is intended to support communication between
several users (a group call), where each user can gain permission to
talk in an arbitrated manner. However, the MCPTT service also
supports private calls between pairs of users.

MCPTT is primarily targeted to provide a professional Push To Talk PTT service to to,
e.g., public safety, transport companies, utilities or utilities, and industrial
and nuclear plants. In addition to this, a commercial PTT service
for non-professional use (e.g., groups of people on holiday) may be
delivered through an MCPTT system. Based on their operational model,
the performance and MCPTT features in use vary per user organization,
where functionality which that is more mission critical
specific mission-critical-specific (e.g.,
Imminent Peril Call) might not be available to commercial customers.

The MCPTT service provides its users with different priorities for
the access to network resources in order to provide means to
prioritize between calls when resources are scarce. These Among other
things, these priorities take into account among other things the priority and role of
the caller, the priority and type of the group, and the situation in
which the call is made.

The SIP level SIP-level call control procedures using these namespaces are
specified in [TS.3GPP.24.379]. The namespaces defined here will
support a wide range of queuing options. The namespaces correspond
to what can be supported over the 3GPP Rx interface, defined in
[TS.3GPP.29.214]. The usage of the namespaces can be tailored to the
needs of the operator. The mechanism to do this is to configure
which values a specific user is allowed to use. This configuration
is specified in [TS.3GPP.24.384].

High priority

High-priority calls when there is danger (when the life of life, for either the a public safety worker
or any other human, anyone else is in danger) need to be set up
immediately and thus immediately; thus,
they require preemption. Other calls may be less sensitive in call set-up
setup time but have a high priority once established. For these calls
calls, a queueing mechanism is more appropriate. The MCPTT data
transfer service currently under development can benefit from a
queueing mechanism. Another example is video only video-only calls that are not
critical in call set-up time, setup time but where keeping the call is important.

This document creates additional Session Initiation Protocol (SIP) SIP Resource-Priority namespaces to
meet the requirements of the 3GPP
defined Mission Critical Push To Talk, 3GPP-defined MCPTT and places these
namespaces in the IANA registry.

2. Applicability

This document defines namespaces applicable for MCPTT services
defined by 3GPP that use the network services of a 3GPP defined 3GPP-defined LTE
network. The use of this namespace outside such networks is
undefined.

3. New SIP Resource-Priority Namespaces Created

3.1. Introduction

This document introduces the following MCPTT namespaces namespaces: mcpttp and mcpttq, the
name coming
mcpttq. The names of which come from the 3GPP defined Mission Critical Push To Talk 3GPP-defined MCPTT service.

3.2. The MCPTT namespaces Namespaces

The mcpttp namespace uses the priority levels listed below from
lowest to highest priority.

mcpttp.0 (lowest priority)

mcpttp.1

mcpttp.2

mcpttp.3

mcpttp.4

mcpttp.5
mcpttp.6

mcpttp.7

mcpttp.8

mcpttp.9

mcpttp.10

mcpttp.11

mcpttp.12

mcpttp.13

mcpttp.14

mcpttp.15 (highest priority)

The Namespace Numerical Value is 46.

Intended algorithm for mcpttp is preemption.

New Warning code: No.

New SIP response code: No.

The mcpttq namespace uses the priority levels listed below from
lowest to highest priority.

mcpttq.0 (lowest priority)

mcpttq.1

mcpttq.2

mcpttq.3

mcpttq.4

mcpttq.5

mcpttq.6

mcpttq.7

mcpttq.8
mcpttq.9

mcpttq.10

mcpttq.11

mcpttq.12

mcpttq.13

mcpttq.14

mcpttq.15 (highest priority)

The Namespace Numerical Value is 47.

Intended algorithm for mcpttq is queuing.

New Warning code: No.

New SIP response code: No.

4. Security Considerations

This document does not have any impact on the security of the SIP
MCPTT protocol. Its purpose is purely administrative in nature.

5. IANA Considerations

Abiding by the rules established within [RFC4412] and [RFC7134] , [RFC7134], this
is an Informative Informational RFC creating two new namespaces, their associated
priority-values, and intended algorithms.

6. Acknowledgments

The authors would like to thank Bob Fredericks, Baruh Hason, Mary
Barnes and Keith Drage for comments and discussions.

7. Change Log

[RFC EDITOR NOTE: Please remove this section when publishing]

Changes from draft-holmberg-dispatch-mcptt-rp-namespace-04.

o - Editorial changes based on gen-art review. Renderin of authors
name and address fixed.

Changes from draft-holmberg-dispatch-mcptt-rp-namespace-03.

o - Editorial changes based on sec- and opt- directorate reviews.

Changes from draft-holmberg-dispatch-mcptt-rp-namespace-01.

o - Removal of Conventions section.
o - Editorial changes.

Changes from draft-holmberg-dispatch-mcptt-rp-namespace-00.

o - The two namespaces have been spelt out explicitly.
o - The numbering of priority levels is changed from 1-16 to 0-15.
o - Address of one author has changed.

8. Normative References

[RFC4412] Schulzrinne, H. and J. Polk, "Communications Resource
Priority for the Session Initiation Protocol (SIP)",
RFC 4412, DOI 10.17487/RFC4412, February 2006,
<http://www.rfc-editor.org/info/rfc4412>.

[RFC7134] Rosen, B., "The Management Policy of the Resource Priority
Header (RPH) Registry Changed to "IETF Review"", RFC 7134,
DOI 10.17487/RFC7134, March 2014,
<http://www.rfc-editor.org/info/rfc7134>.

[TS.3GPP.22.179]
3GPP, "3rd Generation Partnership Project; Technical
Specification Group Services and System Aspects; Mission
Critical Push To Talk (MCPTT) over LTE; Stage 1", 3GPP
TS 22.179 13.3.0, December 2015.

[TS.3GPP.29.214]
3GPP, "3rd Generation Partnership Project; Technical
Specification Group Core Network and Terminals; Policy and
Charging Control over Rx reference point;", 3GPP TS 29.314 29.214
13.7.0, September 2016.

[TS.3GPP.24.379]
3GPP, "3rd Generation Partnership Project; Technical
Specification Group Core Network and Terminals; Mission
Critical Push To Talk (MCPTT) call control; Protocol
specification;", 3GPP TS 24.379 13.2.0, September 2016.

[TS.3GPP.24.384]
3GPP, "3rd Generation Partnership Project; Technical
Specification Group Core Network and Terminals; Mission
Critical Push To Talk (MCPTT) configuration management;
Protocol specification", 3GPP TS 24.384 13.2.0, September
2016.

Acknowledgments

The authors would like to thank Bob Fredericks, Baruh Hason, Mary
Barnes, and Keith Drage for comments and discussions.

Authors' Addresses

Christer Holmberg
Ericsson
Hirsalantie 11
Jorvas 02420
Finland

Email: christer.holmberg@ericsson.com

Joergen Axell
Ericsson
Groenlandsgatan 31
Stockholm 16480
Sweden

Email: jorgen.axell@ericsson.com