1、 I n t e r n a t i o n a l T e l e c o m m u n i c a t i o n U n i o n ITU-T Y.4414/H.623 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (11/2015) SERIES Y: GLOBAL INFORMATION INFRASTRUCTURE, INTERNET PROTOCOL ASPECTS AND NEXT-GENERATION NETWORKS, INTERNET OF THINGS AND SMART CITIES Internet of thi
2、ngs and smart cities and communities Frameworks, architectures and protocols SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMS Broadband, triple-play and advanced multimedia services Advanced multimedia services and applications Web of things service architecture Recommendation ITU-T Y.4414/H.623 ITU-T Y
3、-SERIES RECOMMENDATIONS GLOBAL INFORMATION INFRASTRUCTURE, INTERNET PROTOCOL ASPECTS AND NEXT-GENERATION NETWORKS, INTERNET OF THINGS AND SMART CITIES GLOBAL INFORMATION INFRASTRUCTURE General Y.100Y.199 Services, applications and middleware Y.200Y.299 Network aspects Y.300Y.399 Interfaces and proto
4、cols Y.400Y.499 Numbering, addressing and naming Y.500Y.599 Operation, administration and maintenance Y.600Y.699 Security Y.700Y.799 Performances Y.800Y.899 INTERNET PROTOCOL ASPECTS General Y.1000Y.1099 Services and applications Y.1100Y.1199 Architecture, access, network capabilities and resource m
5、anagement Y.1200Y.1299 Transport Y.1300Y.1399 Interworking Y.1400Y.1499 Quality of service and network performance Y.1500Y.1599 Signalling Y.1600Y.1699 Operation, administration and maintenance Y.1700Y.1799 Charging Y.1800Y.1899 IPTV over NGN Y.1900Y.1999 NEXT GENERATION NETWORKS Frameworks and func
6、tional architecture models Y.2000Y.2099 Quality of Service and performance Y.2100Y.2199 Service aspects: Service capabilities and service architecture Y.2200Y.2249 Service aspects: Interoperability of services and networks in NGN Y.2250Y.2299 Enhancements to NGN Y.2300Y.2399 Network management Y.240
7、0Y.2499 Network control architectures and protocols Y.2500Y.2599 Packet-based Networks Y.2600Y.2699 Security Y.2700Y.2799 Generalized mobility Y.2800Y.2899 Carrier grade open environment Y.2900Y.2999 FUTURE NETWORKS Y.3000Y.3499 CLOUD COMPUTING Y.3500Y.3999 INTERNET OF THINGS AND SMART CITIES AND CO
8、MMUNITIES General Y.4000Y.4049 Definitions and terminologies Y.4050Y.4099 Requirements and use cases Y.4100Y.4249 Infrastructure, connectivity and networks Y.4250Y.4399 Frameworks, architectures and protocols Y.4400Y.4549 Services, applications, computation and data processing Y.4550Y.4699 Managemen
9、t, control and performance Y.4700Y.4799 Identification and security Y.4800Y.4899 For further details, please refer to the list of ITU-T Recommendations. Rec. ITU-T Y.4414/H.623 (11/2015) i Recommendation ITU-T Y.4414/H.623 Web of things service architecture Summary Recommendation ITU-T Y.4414/H.623
10、defines a web of things (WoT) service architecture that can encompass service discovery, accessibility, sharing and mash-up for IoT devices and services with web technologies. It includes an overview of WoT services, the functional architecture of WoT services and WoT service/resource functions. The
11、 WoT service architecture supports accessibility and reusability across IoT resources, and supports portability across heterogeneous network environments. Therefore, this Recommendation is applicable to seamless and interoperable IoT services with information interaction and exchange over physical I
12、oT devices. History Edition Recommendation Approval Study Group Unique ID* 1.0 ITU-T Y.4414/H.623 2015-11-29 16 11.1002/1000/12647 Keywords Web of things, WoT, WoT service architecture. * To access the Recommendation, type the URL http:/handle.itu.int/ in the address field of your web browser, follo
13、wed by the Recommendations unique ID. For example, http:/handle.itu.int/11.1002/1000/11830-en. ii Rec. ITU-T Y.4414/H.623 (11/2015) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication tech
14、nologies (ICTs). The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telec
15、ommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolution 1. In some ar
16、eas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized op
17、erating agency. Compliance with this Recommendation is voluntary. However, the Recommendation may contain certain mandatory provisions (to ensure, e.g., interoperability or applicability) and compliance with the Recommendation is achieved when all of these mandatory provisions are met. The words “sh
18、all“ or some other obligatory language such as “must“ and the negative equivalents are used to express requirements. The use of such words does not suggest that compliance with the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTSITU draws attention to the possibility that the pr
19、actice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation deve
20、lopment process. As of the date of approval of this Recommendation, ITU had received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementers are cautioned that this may not represent the latest information and are therefore
21、 strongly urged to consult the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2016 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T Y.4414/H.623 (11/2015) iii Table of Contents Page 1 Scope
22、. 1 2 References . 1 3 Definitions 1 3.1 Terms defined elsewhere 1 3.2 Terms defined in this Recommendation . 3 4 Abbreviations and acronyms 3 5 Conventions 4 6 Overview of the WoT service . 4 7 Functional architecture of the WoT service 5 7.1 WoT service functions 6 7.2 Web resource functions 7 7.3
23、 Web client . 7 7.4 Things . 7 8 WoT service functions 8 8.1 Functional entities of the WoT service support functions (WoT-S SF) . 8 8.2 Functional entities of the WoT service control functions (WoT-S CF) . 9 8.3 Functional entities of the WoT resource management functions (WoT RMF) 11 9 Web resourc
24、e functions 13 9.1 WoT broker functions . 13 9.2 RESTful web services 14 Appendix I WoT description model 15 I.1 Physical characteristics in WoT description . 15 I.2 Service characteristics in WoT description 15 Appendix II An example of information flows . 16 II.1 Information flow between web clien
25、t and things . 16 Bibliography. 18 Rec. ITU-T Y.4414/H.623 (11/2015) 1 Recommendation ITU-T Y.4414/H.623 Web of things service architecture 1 Scope The objective of this Recommendation is to define a WoT service architecture. The scope of this Recommendation covers the following: overview of the WoT
26、 applications a functional architecture for the WoT service functional entities for the WoT service 2 References The following ITU-T Recommendations and other references contain provisions, which, through reference in this text, constitute provisions of this Recommendation. At the time of publicatio
27、n, the editions indicated were valid. All Recommendations and other references are subject to revision; users of this Recommendation are therefore encouraged to investigate the possibility of applying the most recent edition of the Recommendations and other references listed below. A list of the cur
28、rently valid ITU-T Recommendations is regularly published. The reference to a document within this Recommendation does not give it, as a stand-alone document, the status of a Recommendation. ITU-T M.3030 Recommendation ITU-T M.3030 (2002), Telecommunications Markup Language (tML) framework. ITU-T Y.
29、2002 Recommendation ITU-T Y.2002 (2009), Overview of ubiquitous networking and of its support in NGN. ITU-T Y.2232 Recommendation ITU-T Y.2232 (2008), NGN convergence service model and scenario using web services. ITU-T Y.4000 Recommendation ITU-T Y.4000/Y.2060 (2012), Overview of the Internet of th
30、ings. ITU-T Y.4400 Recommendation ITU-T Y.4400/Y.2063 (2012), Framework of the web of things. 3 Definitions 3.1 Terms defined elsewhere This Recommendation uses the following terms defined elsewhere: 3.1.1 client b-W3C WACterms: The role adopted by an application when it is retrieving and/or renderi
31、ng resources. A program establishes connections for the purpose of sending requests. 3.1.2 device b-W3C digloss: An apparatus through which a user can perceive and interact with the Web. 3.1.3 Internet of things (IoT) ITU-T Y.4000: A global infrastructure for the information society, enabling advanc
32、ed services by interconnecting (physical and virtual) things based on, existing and evolving, interoperable information and communication technologies. NOTE 1 Through the exploitation of identification, data capture, processing and communication capabilities, the IoT makes full use of things to offe
33、r services to all kinds of applications, whilst ensuring that security and privacy requirements are fulfilled. 2 Rec. ITU-T Y.4414/H.623 (11/2015) NOTE 2 In a broad perspective, the IoT can be perceived as a vision with technological and societal implications. 3.1.4 metadata ITU-T M.3030: Data that
34、describes other data. 3.1.5 resource b-IETF RFC 3986: This specification does not limit the scope of what might be a resource; rather, the term “resource“ is used in a general sense for whatever might be identified by a URI. Familiar examples include an electronic document, an image, a source of inf
35、ormation with a consistent purpose (e.g., “todays weather report for Los Angeles“), a service (e.g., an HTTP-to-SMS gateway), and a collection of other resources. A resource is not necessarily accessible via the Internet; e.g., human beings, corporations, and bound books in a library can also be res
36、ources. Likewise, abstract concepts can be resources, such as the operators and operands of a mathematical equation, the types of a relationship (e.g., “parent“ or “employee“), or numeric values (e.g., zero, one, and infinity). 3.1.6 server b-W3C WACterms: The role adopted by an application when it
37、is supplying resources. 3.1.7 service provider ITU-T Y.2232: An entity that provides services. 3.1.8 SOAP b-W3C SOAP 1: The formal set of conventions governing the format and processing rules of a SOAP message. These conventions include the interactions among SOAP nodes generating and accepting SOAP
38、 messages for the purpose of exchanging information along a SOAP message path. 3.1.9 SOAP intermediary b-W3C SOAP 1: A SOAP intermediary is both a SOAP receiver and a SOAP sender and is targetable from within a SOAP message. It processes the SOAP header blocks targeted at it and acts to forward a SO
39、AP message towards an ultimate SOAP receiver. 3.1.10 the World Wide Web (WWW, or simply web) b-W3C webarch: An information space in which the items of interest, referred to as resources, are identified by global identifiers called Uniform Resource Identifiers (URI). 3.1.11 thing ITU-T Y.4000: In the
40、 Internet of things, object of the physical world (physical things) or of the information world (virtual things), which is capable of being identified and integrated into the communication networks. 3.1.12 URI b-IETF RFC 3986: A URI is an identifier consisting of a sequence of characters matching th
41、e syntax rule named in Section 3 of b-IETF RFC 3986. It enables uniform identification of resources via a separately defined extensible set of naming schemes (Section 3.1 of b-IETF RFC 3986). How that identification is accomplished, assigned, or enabled is delegated to each scheme specification. 3.1
42、.13 web of things ITU-T Y.4400: A way of realization of the IoT where (physical and virtual) things are connected and controlled through the World Wide Web. 3.1.14 web resource b-W3C WACterms: A resource, identified by a URI. 3.1.15 web services ITU-T Y.2232: Web services is a service provided using
43、 web services systems. 3.1.16 web services gateway (WSG) ITU-T Y.2232: A gateway which handles the web services message between the WSP and WSR. 3.1.17 web services provider (WSP) ITU-T Y.2232: A service provider that exposes a capability for use to create web services. 3.1.18 web services registry
44、ITU-T Y.2232: An entity that stores web services information (e.g., WSDL). 3.1.19 Web services requester (WSR) ITU-T Y.2232: Client software that makes use of the services provided by a WSP. Rec. ITU-T Y.4414/H.623 (11/2015) 3 3.1.20 web services system ITU-T Y.2232: A web services system is a softw
45、are system designed to support interoperable machine-to-machine interaction over a network using web services standards. NOTE It has an interface described in a machine-processable format (specifically WSDL). Other systems interact with the web services in a manner prescribed by its description usin
46、g SOAP-messages, typically conveyed using HTTP with an XML serialization in conjunction with other web-related standards. 3.1.21 WSDL b-W3C WSDL 1: Web services description language Version 2.0 (WSDL 2.0) provides a model and an XML format for describing web services. WSDL 2.0 enables one to separat
47、e the description of the abstract functionality offered by a service from concrete details of a service description such as “how“ and “where“ that functionality is offered. 3.2 Terms defined in this Recommendation None. 4 Abbreviations and acronyms This Recommendation uses the following abbreviation
48、s and acronyms: API Application Programming Interface CPU Central Processing Unit DPWS Device Profile for Web Services GPU Graphics Processing Unit HTML Hypertext Markup Language HTTP Hypertext Transport Protocol ID Identification IoT Internet of Things IP Internet Protocol JSON JavaScript Object No
49、tation NFC Near Field Communication QoS Quality of Service RDFa Resource Description Framework in attributes REST Representational State Transfer SOAP Simple Object Access Protocol TCP Transmission Control Protocol UI User Interface URI Uniform Resource Identifiers Web-RM FE Web Resource Management Functional Entity WoT Web of Things WoT-BM FE WoT Broker Management Functional Entity WoT-DM FE WoT Description Management Functional Entity WoT-EN FE WoT Enrolmen
