ISO/TR 16056-2:2004
(Main)Health informatics — Interoperability of telehealth systems and networks — Part 2: Real-time systems
Health informatics — Interoperability of telehealth systems and networks — Part 2: Real-time systems
ISO/TR 16056-2:2004 builds on the introduction to telehealth described in Part 1: Introduction and definitions, and focuses on the technical standards related to real-time applications (including video, audio, and data conferencing) and interoperability aspects of telehealth systems and networks. Specifically, this document addresses four main areas: Standards for real-time telehealth systems: The document describes the technical standards related to real-time telehealth applications, including audio, video, and data conferencing capabilities. It also identifies gaps, overlaps and inconsistencies in the standards, and provides some guidance about how they need to evolve. Interoperability issues in telehealth applications: The document examines interoperability aspects of real-time multimedia conferencing standards and telehealth products, and identifies areas of concern from the interoperability perspective that need to be resolved. Requirements for interoperable telehealth systems and networks: The document defines interoperability requirements at different levels of interaction between telehealth systems and provides some guidelines on how interoperability can be achieved. Framework for interoperable architectures: The document identifies interoperable building blocks for telehealth solutions and interactions between these building blocks, and explores the possibility of standardization of these building blocks. The scope of the document does not include conformity and interoperability tests or functional specifications for telehealth systems and networks.
Informatique de santé — Interopérabilité des systèmes et des réseaux de télésanté — Partie 2: Systèmes en temps réel
General Information
Standards Content (Sample)
TECHNICAL ISO/TR
REPORT 16056-2
First edition
2004-07-01
Health informatics — Interoperability of
telehealth systems and networks —
Part 2:
Real-time systems
Informatique de santé — Interopérabilité des systèmes et des réseaux
de télésanté —
Partie 2: Systèmes en temps réel
Reference number
©
ISO 2004
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ISO TR 16056-2:2004(E)
Contents Page
Foreword . v
Introduction. vi
1 Scope . 1
2 Normative References. 1
3 Terms and definitions . 2
4 Abbreviations . 12
5 Multimedia Conferencing Standards . 13
5.1 General . 13
5.2 H.320 recommendations . 16
5.3 H.321 and H.310 Recommendations . 17
5.4 H.323 Recommendations . 19
5.4.1 H.323 Terminals . 19
5.4.2 Gateways. 21
5.4.3 Gatekeeper . 21
5.4.4 Multipoint control unit . 21
5.5 H.324 Recommendations . 22
5.6 T.120 Recommendations . 23
5.6.1 T120 Overview. 23
5.6.2 T.120 Layer composition. 23
5.6.3 T.120 Interoperability.24
6 Telehealth applications . 24
6.1 General . 24
6.2 Telelearning . 25
6.3 Teleconsultation . 26
7 Interoperability issues . 28
7.1 General . 28
7.2 Standard-related sources of interoperability issues. 28
7.2.1 Loose adaptation of previous protocols. 29
7.2.2 Loosely defined encoding and decoding methods. 29
7.2.3 Inconsistent definition of mandatory/optional requirements. 29
7.2.4 Gaps in the recommendations. 29
7.2.5 No specifications for data encoding in the H.320/H.323 Recommendations . 30
7.2.6 Evolving T.120 Recommendations. 30
7.2.7 Loosely defined specifications for an MCU. 30
7.2.8 Evolving/undefined specifications for Gateways and Gatekeepers . 30
7.2.9 Loosely defined bandwidth management. 31
7.2.10 Poor standardization of media conferencing . 31
7.3 Product-related Sources of Interoperability Issues . 31
7.3.1 Time delay between the standards (ever-evolving) and products . 31
7.3.2 Implementation of a different subset of the standards. 32
7.3.3 Proprietary solutions. 32
7.4 Implementation-related sources of interoperability issues. 32
7.4.1 Undefined specifications for Gatekeeper Communication. 32
7.4.2 Gateway to Gatekeeper Communication. 32
7.4.3 A decentralized multipoint conference . 33
8 Interoperability requirements. 33
8.1 General . 33
8.2 Call Setup. 34
8.3 Acquisition, processing, and transmission of multimedia data . 35
8.4 Controlling near- and far-end devices .36
ISO TR 16056-2:2004(E)
8.5 Call termination. 36
9 Interoperability in heterogeneous telehealth networks . 36
9.1 General . 36
9.2 Interoperability of H.320 systems over frame relay network. 36
9.3 Interoperability of h.3xx-compliant systems over heterogeneous networks. 37
9.3.1 Gatekeeper functions. 38
9.3.2 MCU functions. 39
9.3.3 Design requirements – Telehealth solutions . 40
10 Framework for interoperable architectures. 41
10.1 General . 41
10.2 Telehealth component boundaries.41
10.2.1 User interface . 41
10.2.2 Medical Devices . 42
10.2.3 Data manager . 42
10.2.4 Processing Manager . 42
10.2.5 Communications Manager . 43
10.2.6 Resource Manager . 43
10.2.7 Integration Manager. 43
Bibliography. 45
List of Figures
Figure 1 - The H.320 Terminal . 16
Figure 2 - A multipoint configuration. 17
Figure 3 - The H.321 Terminal . 18
Figure 4 - The H.323 Terminal . 20
Figure 5 - The H.324 Terminal . 22
Figure 6 - The T.120 Recommendations. 23
Figure 7 - Parties contributing to telehealth interoperability. 28
Figure 8 - Interoperability dimensions for real-time telehealth services . 34
Figure 9 - H.320 video services incorporated into existing data and voice networks over frame relay . 37
Figure 10 - Connectivity in a heterogeneous system and network environment. 38
List of Tables
Table 1 - Summary of the multimedia conferencing standards. 15
Table 2 - Summary of the H.320 Recommendations. 17
Table 3 - The H.323 and T.120 protocol stack . 20
Table 4 - Summary of the H.323 Recommendations. 21
Table 5 - Summary of functionality of a telelearning system . 25
Table 6 - Summary of functionality of a teleconsultation system . 26
iv
ISO TR 16056-2:2004(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main t
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