CoRE Z. Shelby
Internet-Draft Sensinode
Intended status: Standards Track S. Krco
Expires: August 29, 2013 Ericsson
C. Bormann
Universitaet Bremen TZI
February 25, 2013
CoRE Resource Directory
draft-shelby-core-resource-directory-05
Abstract
In many M2M applications, direct discovery of resources is not
practical due to sleeping nodes, disperse networks, or networks where
multicast traffic is inefficient. These problems can be solved by
employing an entity called a Resource Directory (RD), which hosts
descriptions of resources held on other servers, allowing lookups to
be performed for those resources. This document specifies the web
interfaces that a Resource Directory supports in order for web
servers to discover the RD and to register, maintain, lookup and
remove resources descriptions. Furthermore, new link attributes
useful in conjunction with an RD are defined.
Status of this Memo
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This Internet-Draft will expire on August 29, 2013.
Copyright Notice
Copyright (c) 2013 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Shelby, et al. Expires August 29, 2013 [Page 1]
Internet-Draft CoRE Resource Directory February 2013
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Architecture and Use Cases . . . . . . . . . . . . . . . . . . 4
3.1. Use Case: Cellular M2M . . . . . . . . . . . . . . . . . . 5
3.2. Use Case: Home and Building Automation . . . . . . . . . . 6
4. Simple Directory Discovery . . . . . . . . . . . . . . . . . . 6
4.1. Finding a Directory Server . . . . . . . . . . . . . . . . 7
5. Resource Directory Function Set . . . . . . . . . . . . . . . 8
5.1. Discovery . . . . . . . . . . . . . . . . . . . . . . . . 8
5.2. Registration . . . . . . . . . . . . . . . . . . . . . . . 10
5.3. Update . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.4. Validation . . . . . . . . . . . . . . . . . . . . . . . . 13
5.5. Removal . . . . . . . . . . . . . . . . . . . . . . . . . 15
6. Group Function Set . . . . . . . . . . . . . . . . . . . . . . 16
6.1. Register a Group . . . . . . . . . . . . . . . . . . . . . 16
6.2. Group Removal . . . . . . . . . . . . . . . . . . . . . . 17
7. RD Lookup Function Set . . . . . . . . . . . . . . . . . . . . 18
8. New Link-Format Attributes . . . . . . . . . . . . . . . . . . 23
8.1. Resource Instance 'ins' attribute . . . . . . . . . . . . 23
8.2. Export 'exp' attribute . . . . . . . . . . . . . . . . . . 23
9. Security Considerations . . . . . . . . . . . . . . . . . . . 24
10. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 24
11. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 24
12. Changelog . . . . . . . . . . . . . . . . . . . . . . . . . . 24
13. References . . . . . . . . . . . . . . . . . . . . . . . . . . 26
13.1. Normative References . . . . . . . . . . . . . . . . . . . 26
13.2. Informative References . . . . . . . . . . . . . . . . . . 26
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