IEC TR 62343-6-10:2017

Dynamic modules - Part 6-10: Design guide - Intermediate controller for multiple dynamic module systems

IEC TR 62343-6-10:2017(E) which is a Technical Report, discusses the rationale, conceptual definition, and minimum list of functions for an intermediate controller that delivers a dynamic control signal to multiple dynamic modules. These modules are included in an optical-switch-based network node, according to the upper layer controller of software-defined optical networking.

General Information

• Status: Published
• Publication Date: 21-Mar-2017
• ICS: 11.140 - Hospital equipment
• ICS: 33.180.01 - Fibre optic systems in general
• ICS: 33.180.99 - Other fibre optic equipment
• Technical Committee: SC 86C - Fibre optic systems, sensing and active devices
• Drafting Committee: WG 5 - TC 86/SC 86C/WG 5
• Current Stage: PPUB - Publication issued
• Start Date: 22-Mar-2017
• Completion Date: 11-Apr-2017

Overview

IEC TR 62343-6-10:2017 (Edition 1.0, 2017-03) is a Technical Report from the IEC 62343 series that provides a design guide for an intermediate controller that delivers dynamic control signals to multiple dynamic modules inside an optical-switch-based network node. The report frames the rationale and conceptual definition, and specifies a minimum list of functions and shared information needed between the intermediate controller and the SDN (software-defined networking) upper-layer controller for software-defined optical networking.

Key topics and requirements

• Scope and objective
  • Defines the role and design guidance for an intermediate controller in multi-module optical nodes to enable dynamic reconfiguration and SDN-based control.
• Architecture and structure
  • Conceptual block diagrams and structural guidance for controllers that manage several dynamic modules (figures show control interface and internal blocks).
• Functions and interfaces
  • A minimum functional set is described (function coverage, control/configuration vs. connection information), plus the types of shared information exchanged with the network control plane (see Table 1 in the report).
• Background and research context
  • Reviews SDN principles for optical networks, research activities (OpenFlow® use cases, dynamic optical path networks), and control-plane considerations for photonic nodes.
• Examples and use cases
  • Detailed examples of multi-degree ROADM systems, colourless/directionless/contentionless (C/D/C-ROADM) architectures, and transponder aggregator concepts that illustrate controller roles.
• Practical design guidance
  • Emphasis on reliable, scalable, cost- and energy-efficient implementations of controllers that coordinate WDM, WSS, OXC and other dynamic optical modules.

Note: the TR contains no normative references and is intended as guidance rather than prescriptive standard text.

Applications

• Enabling software-defined optical networking by providing the intermediary control layer between SDN controllers and optical hardware.
• Architecting and implementing control subsystems for ROADM nodes, WDM systems, wavelength-selective switches (WSS), and transponder aggregators.
• Supporting dynamic optical path networks where multiple dynamic modules must be coordinated for path setup, restoration, and resource optimization.
• Informing product design, system integration, and R&D for optical network equipment vendors and integrators.

Who should use this

• Network architects and SDN control-plane engineers
• Optical equipment vendors and firmware/hardware designers
• System integrators and operators deploying dynamic optical nodes
• Standards developers and researchers working on photonic-layer control

Related guidance

• Other parts of the IEC 62343 series on dynamic modules
• SDN/Optical control literature such as OpenFlow® use cases and dynamic optical path network research referenced in the report

Keywords: IEC TR 62343-6-10:2017, intermediate controller, dynamic modules, SDN, optical node, ROADM, WDM, WSS, transponder aggregator, control plane.

Standards Content (Sample)

IEC TR 62343-6-10 ®
Edition 1.0 2017-03
TECHNICAL
REPORT
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inside
Dynamic modules –
Part 6-10: Design guide – Intermediate controller for multiple dynamic module
systems
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IEC TR 62343-6-10 ®
Edition 1.0 2017-03
TECHNICAL
REPORT
colour
inside
Dynamic modules –
Part 6-10: Design guide – Intermediate controller for multiple dynamic module

systems
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.180.01, 33.180.99 ISBN 978-2-8322-4127-1

– 2 – IEC 62343-6-10:2017 © IEC 2017

CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms, definitions and abbreviated terms . 6
3.1 Terms and definitions . 6
3.2 Abbreviated terms . 6
4 Background of the software defined networking and its control plane for optical
nodes . 7
5 Research activities on high-performance node systems where intermediate
controller plays key role . 7
5.1 Photonic network with OpenFlow® controller . 7
5.2 Dynamic optical path network with a network controller . 7
5.3 Control interface of the Photonic Layer-2 . 8
6 Intermediate controller for multiple dynamic module systems . 8
6.1 Description of the controller . 8
6.1.1 Controller of multiple dynamic modules for a network node . 8
6.1.2 Structure of the intermediate controller . 9
6.2 Functions . 10
6.3 Shared information between the control interface and the network control
plane . 11
7 Example of multi-degree ROADM systems . 12
8 Conclusion . 14
Bibliography . 15

Figure 1 – Conceptual block of the control interface for multiple dynamic modules and
network devices . 8
Figure 2 – Basic block of the control interface for multiple dynamic modules. 9
Figure 3 – Difference between connection information and configuration information . 10
Figure 4 – Function coverage of the intermediate controller . 11
Figure 5 – Example of a multiple dynamic module system . 12
Figure 6 – Example of 4-degree ROADM node architecture . 13
Figure 7 – 3-degree ROADM node with colourless, non-directional add/drop ports . 13
Figure 8 – Compact PLC-based transponder aggregator for colourless and
directionless ROADM . 14

Table 1 – Shared information in the intermediate controller . 12

IEC 62343-6-10:2017 © IEC 2017 – 3 –

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
DYNAMIC MODULES –
Part 6-10: Design guide – Intermediate controller
for multiple dynamic module systems

FOREWORD
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example "state of the art".
IEC TR 62343-6-10, which is a technical report, has been prepared by subcommittee 86C:
Fibre optic systems and active devices, of IEC technical committee TC 86: Fibre optics.
The text of this technical report is based on the following documents:
Enquiry draft Report on voting
86C/1381/DTR 86C/1422/RVC
– 4 – IEC 62343-6-10:2017 © IEC 2017

Full information on the voting for the approval of this technical report can be found in the
report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 62343 series, published under the general title Dynamic modules,
can be found on the IEC website.
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IEC 62343-6-10:2017 © IEC 2017 – 5 –

INTRODUCTION
Software defined networking (SDN) technology is widely recognized as a promising solution
for flexible and efficient provisioning of networks by virtualizing their infrastructures, which
results in cost-effective realization of high capacity, low energy consumption and even low
latency. SDN technology will remain highly influential over global industries, societies, and the
environment for many years to come.
Optical fibre communication technology has offered sufficient transport capacity with a fixed
physical topology. However, recent technological progress in optical networking enables
physical reconfiguration of optical paths by controlling multiple dynamic modules such as
wavelength division multiplexing (WDM) devices and switching devices. Here, the key is to
have an intermediate controller that controls and maintains the multiple dynamic modules in
an integrated fashion, according to the upper layer controller of the SDN.
In order to realize such a reconfigurable and/or dynamically switchable optical network
infrastructures at a hardware level in a cost-effective, reliable, scalable and low-carbon
manner, it is important to initiate, in a timely manner and to a wide extent, conceptual and
technical discussions, particularly on the intermediate controller for future standardization.
It is very important for industries to identify requirements for network architecture and
devices/components in a timely manner, and to improve the technology development and
investment efficiencies.
The objective of this part of IEC 62343 is to contribute to the standardization of basic
requirements of the dynamic optical path networks using the intermediate controller.

– 6 – IEC 62343-6-10:2017 © IEC 2017

DYNAMIC MODULES –
Part 6-10: Design guide – Intermediate controller
for multiple dynamic module systems

1 Scope
This part of IEC 62343, which is a Technical Report, discusses the rationale, conceptual
definition, and minimum list of functions for an intermediate controller that delivers a dynamic
control signal to multiple dynamic modules. These modules are included in an optical-switch-
based network node, according to the upper layer controller of software-defined optical
networking.
2 Normative references
There are no normative references in this document.
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.2 Abbreviated terms
AWG arrayed waveguide grating
C/D/C-ROADM colourless/directionless/contentionless reconfigurable optical add-drop
multiplexing
I/F interface
IP internet protocol
mI/F module side interface
MCOS multicast optical switch
OCM optical channel monitor
ODU optical data unit
OXC optical cross connect
PLC planar lightwave circuit
ROADM reconfigurable optical add-drop multiplexing
Rx receiver
SDN software defined networking
TPA transponder aggregator
Tx transmitter
Tx/Rx transceiver
IEC 62343-6-10:2017 © IEC 2017 – 7 –

WDM wavelength division multiplexing
WSS wavelength selective switch
WXC wavelength cross connect
4 Background of the software defined networking and its control plane for
optical nodes
Optical networks are evolving from static link services to flexible link services to provide
future dynamic transport services. Software defined networking (SDN) is one of the network
architectures that enable flexible and dynamic network control. The basic idea of SDN is to
separate the control plane from the data plane, allowing consolidation of hardware
infrastructure to save the overhead associated with per-service deployment of a closed set of
resources such as computation, storage, and network. For optically switched networks such
as colourless/directionless/contentionless reconfigurable optical add-drop multiplexing
(C/D/C-ROADM) based mesh networks to be dynamically controlled through SDN, the control
scheme should be designed to be as simple as possible, as they associate with complex
configurations of multiple dynamic modules. In particular, common control interface is a key
for realizing the control plane for such an optically switched node; thus, these interfaces
should be properly defined from not only the software, but also the hardware aspect. Such an
interface enables qu
...