ISO/IEC 17821:2015 情報技術—チャネルホップTDMAリンクを介した低電力ワイヤレスメッシュネットワークの仕様 | ページ 2

Foreword

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The committee responsible for this document is ISO/IEC JTC 1, Information technology, SC 6, Telecommunications and information exchange between systems.

Introduction

This working draft defines the protocol for the low-power wireless mesh network over channel-hopped TDMA links (LPWMN). The objective of LPWMN is to define a wireless mesh network specification, which is relatively lightweight compared to the legacy WPAN network specifications and can maximize usefulness of the channel-hopped TDMA link which is followed by the deterministic and synchronous multichannel extension (DSME) MAC specified in IEEE 802.15.4e-2012 amendment.

In recent years, there is market demand for applying the low-energy short range communication of the WSN to the networks for mission-critical services or real-time services including remote monitoring and alarming of health devices or medicine equipment, sensing and actuation control of process automation, and voice service over the low-energy short range networks. To provide more reliable link and deterministic delay for the mission-critical services, enhancements of the IEEE 802.15.4-2006 MAC specification was started in March 2008 and the draft of the amendment is approved in February 2012. In the IEEE 802.15.4e-2012 amendment, three types of TDMA and two types of channel diversity function are added as optional MAC features.

These new MAC features introduce two attributes to be managed in the network layer, which includes time slots and radio channels. To employ the new enhanced MAC for the reliable and real-time services in the low-cost, low-power, short-range communication network, the network protocol needs to be designed for managing the network resources including time slots and radio channels. The LPWMN is a network specification over the DSME of IEEE 802.15.4e-2012 amendment. The LPWMN is applicable to industrial applications that require a loss sensitive large wireless network guaranteeing deterministic end-to-end delay with low-power resource-constrained communication nodes.

The International Organization for Standardization (ISO) and International Electrotechnical Commission (IEC) draw attention to the fact that it is claimed that compliance with this document may involve the use of a patent concerning the functional procedure and message structure of LPWMN given in Clauses 5, 6, 7, and 8, and a patent concerning the authentication and key establishment protocols given in Annex B.

ISO and IEC take no position concerning the evidence, validity, and scope of this patent right.

The holder of this patent right has assured the ISO and IEC the willingness to negotiate licences either free of charge or under reasonable and non-discriminatory terms and conditions with applicants throughout the world. In this respect, the statement of the holder of this patent right is registered with ISO and IEC. Information may be obtained from the following:

• Patent holder: Electronics and Telecommunications Research Institute (ETRI)Address: 138 Gajeongno, Yuseong-gu, Daejeon, 305-700, Korea;
• Patent holder: China IWNCOMM Co., LTDAddress: A201, QinFengGe, Xi’an Software Park, No. 68 Keji 2rd, Xi’an Hi-Tech Industrial Development Zone, Xi’an Shaanxi, P.R.China. 710075.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights other than those identified above. ISO and IEC shall not be held responsible for identifying any or all such patent rights.

ISO ( www.iso.org/patents ) and IEC ( http://patents.iec.ch ) maintain online databases of patents relevant to their standards. Users are encouraged to consult the databases for the most up-to-date information concerning patents.

1 Scope

This International Standard defines the network specification for devices, which are operated on IEEE Std. 802.15.4-2011 PHY, capable to support the channel-hopped TDMA links of the DSME MAC of IEEE Std. 802.15.4e-2012, to provide low-cost communication network that allows reliable, deterministic-latency, and scalable wireless mesh connectivity.

This International Standard provides the following:

• DSME MAC link control;
• unbalanced cluster-tree based network formation;
• directional multiple grades mesh connection;
• link-path routing and data forwarding;
• link and link-path maintenance.

2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

IEEE Std 802.15.4-2011, IEEE Standard for Local and metropolitan area networks—Part 15.4: Low-Rate Wireless Personal Area Networks (LR-WPANs)

IEEE Std 802.15.4e-2012, IEEE Standard for Local and metropolitan area networks—Part 15.4: Low-Rate Wireless Personal Area Networks (LR-WPANs), Amendment 1: MAC sublayer

3 Terms and definitions

For the purposes of this document, the following terms and definitions apply.

Bibliography