Dynamic Resource Linking for Constrained RESTful Environments
draft-ietf-core-dynlink-10
CoRE Working Group Z. Shelby
Internet-Draft ARM
Intended status: Informational M. Koster
Expires: January 23, 2020 SmartThings
C. Groves
J. Zhu
Huawei
B. Silverajan, Ed.
Tampere University
July 22, 2019
Dynamic Resource Linking for Constrained RESTful Environments
draft-ietf-core-dynlink-10
Abstract
This specification defines Link Bindings, which provide dynamic
linking of state updates between resources, either on an endpoint or
between endpoints, for systems using CoAP (RFC7252). This
specification also defines Conditional Notification Attributes that
work with Link Bindings or with CoAP Observe (RFC7641).
Editor note
The git repository for the draft is found at https://github.com/core-
wg/dynlink
Status of This Memo
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This Internet-Draft will expire on January 23, 2020.
Shelby, et al. Expires January 23, 2020 [Page 1]
Internet-Draft Dynamic Resource Linking for CoRE July 2019
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Conditional Notification Attributes . . . . . . . . . . . . . 4
3.1. Attribute Definitions . . . . . . . . . . . . . . . . . . 4
3.1.1. Minimum Period (pmin) . . . . . . . . . . . . . . . . 5
3.1.2. Maximum Period (pmax) . . . . . . . . . . . . . . . . 6
3.1.3. Change Step (st) . . . . . . . . . . . . . . . . . . 6
3.1.4. Greater Than (gt) . . . . . . . . . . . . . . . . . . 6
3.1.5. Less Than (lt) . . . . . . . . . . . . . . . . . . . 7
3.1.6. Notification Band (band) . . . . . . . . . . . . . . 7
3.2. Server processing of Conditional Notification Attributes 8
4. Link Bindings . . . . . . . . . . . . . . . . . . . . . . . . 9
4.1. The "bind" attribute and Binding Methods . . . . . . . . 10
4.1.1. Polling . . . . . . . . . . . . . . . . . . . . . . . 11
4.1.2. Observe . . . . . . . . . . . . . . . . . . . . . . . 11
4.1.3. Push . . . . . . . . . . . . . . . . . . . . . . . . 12
4.1.4. Execute . . . . . . . . . . . . . . . . . . . . . . . 12
4.2. Link Relation . . . . . . . . . . . . . . . . . . . . . . 12
5. Binding Table . . . . . . . . . . . . . . . . . . . . . . . . 13
6. Implementation Considerations . . . . . . . . . . . . . . . . 14
7. Security Considerations . . . . . . . . . . . . . . . . . . . 15
8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 15
8.1. Resource Type value 'core.bnd' . . . . . . . . . . . . . 15
8.2. Link Relation Type . . . . . . . . . . . . . . . . . . . 15
9. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 16
10. Contributors . . . . . . . . . . . . . . . . . . . . . . . . 16
11. Changelog . . . . . . . . . . . . . . . . . . . . . . . . . . 16
12. References . . . . . . . . . . . . . . . . . . . . . . . . . 18
12.1. Normative References . . . . . . . . . . . . . . . . . . 18
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