ISO/IEC 24792:2010

INTERNATIONAL ISO/IEC
STANDARD 24792
First edition
2010-04-15
Information technology —
Telecommunications and information
exchange between systems — Multicast
Session Management Protocol (MSMP)
Technologies de l'information — Téléinformatique — Protocole de
gestion de session de multidiffusion (MSMP)

Reference number
©
ISO/IEC 2010
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©  ISO/IEC 2010
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ii © ISO/IEC 2010 – All rights reserved

Contents Page
Foreword .iv
Introduction.v
1 Scope.1
2 Normative references.1
3 Terms and definitions .1
3.1 Terms defined in ITU-T Rec. X.601 .1
3.2 Terms defined in ITU-T Rec. X.602 | ISO/IEC 16513 .1
3.3 Terms defined in ITU-T Rec. X.605 | ISO/IEC 13252 .2
3.4 Terms defined in ITU-T Rec. X.606 | ISO/IEC 14476-1.2
3.5 Terms defined in ITU-T Rec. X.606.1 | ISO/IEC 14476-2.2
3.6 Terms defined in this International Standard.2
4 Abbreviated terms.3
4.1 Message types .3
4.1.1 Session Management message types.3
4.1.2 QoS Management message types .4
4.2 Miscellaneous .4
5 Conventions.5
6 Overview.5
6.1 General MSMP .5
6.2 Session Management.5
6.3 QoS Management .6
7 Protocol operations.8
7.1 Session Management.8
7.1.1 Session creation.8
7.1.2 Session registration.8
7.1.3 Session enrollment .9
7.2 QoS Management .9
7.2.1 General QM .9
7.2.2 QoS reporting request and response.10
7.2.3 QoS setting request and response.11
7.2.4 QoS updating request and response .12
7.2.5 QoS value request and response .15
7.2.6 QoS termination request and indication.15
8 MSMP messages .16
8.1 Session Management message types and the format.16
8.2 QoS Management message types .16
8.3 QoS management message format .17
9 MSMP variables .20
9.1 Variables.20
9.2 Timer.20
Annex A (informative) Relationship between MSMP, GMP, and ECTP .21
Annex B (informative) Messages exchange between MSMP server and GMP server .22

© ISO/IEC 2010 – All rights reserved iii

Foreword
ISO (the International Organization for Standardization) and IEC (the International Electrotechnical
Commission) form the specialized system for worldwide standardization. National bodies that are members of
ISO or IEC participate in the development of International Standards through technical committees
established by the respective organization to deal with particular fields of technical activity. ISO and IEC
technical committees collaborate in fields of mutual interest. Other international organizations, governmental
and non-governmental, in liaison with ISO and IEC, also take part in the work. In the field of information
technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of the joint technical committee is to prepare International Standards. Draft International
Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as
an International Standard requires approval by at least 75 % of the national bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights.
ISO/IEC 24792 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology,
Subcommittee SC 6, Telecommunications and information exchange between systems.
iv © ISO/IEC 2010 – All rights reserved

Introduction
Multicast Session Management Protocol (MSMP) will operate over the conventional transport protocols and/or
Enhanced Communications Transport Protocol (ECTP), as shown in Figure 1.

Figure 1 — MSMP Model (MSMP Protocol Stack)

© ISO/IEC 2010 – All rights reserved v

INTERNATIONAL STANDARD ISO/IEC 24792:2010(E)

Information technology — Telecommunications and information
exchange between systems — Multicast Session Management
Protocol (MSMP)
1 Scope
This International Standard provides a specification of a Multicast Session Management Protocol (MSMP),
which is an application-layer control protocol for managing quality of service for group communication. MSMP
consists of QoS management (QM) functions.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ITU-T Rec. X.601 (2000), Information technology — Multi-Peer Communications Framework
ITU-T Rec. X.602 (2004) | ISO/IEC 16513: 2005, Information technology — Group management protocol
ITU-T Rec. X.605 (1998) | ISO/IEC 13252:1999, Information technology — Enhanced communications
transport service definition
ITU-T Rec. X.606 (2001) | ISO/IEC 14476-1:2002, Information technology — Enhanced communications
transport protocol: Specification of simplex multicast transport
ITU-T Rec. X.606.1 (2002) | ISO/IEC 14476-2:2003, Information technology — Enhanced communications
transport protocol: Specification of QoS management for simplex multicast transport
3 Terms and definitions
3.1 Terms defined in ITU-T Rec. X.601
For the purposes of this document, the following terms defined in ITU-T Rec. X.601 apply:
a) multi-peer;
b) multi-peer communication;
c) multicast transmission.
3.2 Terms defined in ITU-T Rec. X.602 | ISO/IEC 16513
For the purposes of this document, the following terms defined in ITU-T Rec. X.602 | ISO/IEC 16513 apply:
a) GMP client;
© ISO/IEC 2010 – All rights reserved 1

b) GMP server;
c) session creator;
d) session client;
e) session participant.
3.3 Terms defined in ITU-T Rec. X.605 | ISO/IEC 13252
For the purposes of this document, the following terms defined in ITU-T Rec. X.605 | ISO/IEC 13252 apply:
a) enrolled group;
b) active group;
c) TC-owner.
3.4 Terms defined in ITU-T Rec. X.606 | ISO/IEC 14476-1
For the purposes of this document, the following terms defined in ITU-T Rec. X.606 | ISO/IEC 14476-1 apply:
a) TO (top owner);
b) LO (local owner);
c) LE (leaf entity).
3.5 Terms defined in ITU-T Rec. X.606.1 | ISO/IEC 14476-2
For the purposes of this document, the following terms defined in ITU-T Rec. X.606.1 | ISO/IEC 14476-2
apply:
a) QoS monitoring;
b) QoS maintenance.
3.6 Terms defined in this International Standard
For the purposes of this document, the following terms and definitions apply.
3.6.1
MSMP server
application program that is responsible for QoS management
NOTE The MSMP server will aggregate the QoS parameter values from all session participants and arbitrate the
QoS parameter values. After arbitration, the MSMP server will announce the arbitrated QoS parameter values to all
session participants. The MSMP server will keep and update the QoS parameter values.
3.6.2
MSMP client
application program that sends and receives MSMP messages
NOTE Clients store and acquire information through a MSMP server. All clients need to log in to the server to acquire
information from the server. Clients are largely divided between a session creator and session participants.
2 © ISO/IEC 2010 – All rights reserved

3.6.3
session creator
client who creates and who may terminate a session
NOTE 1 The session creator is defined in ITU-T Rec. X.602 | ISO/IEC 16513.
NOTE 2 The session creator is the sender and sends the QoS parameter values for the traffic characteristics of the
data that the sender will transmit to receivers.
3.6.4
session participant
client who registers for a session intending to participate in that session, and who, after registration, will join
the session to be an active member
NOTE 1 A session participant may be a sender in the session.
NOTE 2 The session participant has to respond to a QoS Reporting Request message, QRREQ, via a QoS Reporting
Response message, QRRES.
NOTE 3 A session participant may be a TC-participant defined in ITU-T Rec. X.605 | ISO/IEC 13252, ECTS.
4 Abbreviated terms
4.1 Message types
4.1.1 Session Management message types
The session management message types are defined in ITU-T Rec. X.602 | ISO/IEC 16513.
SCREQ Session Creation Request message
SCACC Session Creation Acce
...