پیشرفت های اخیر در استاندارد های مرتبط با اینترنت اشیا: یک دیدگاه oneM2M Recent advancements in the Internet-of-Things related standards: A oneM2M perspective

1. Introduction Internet of Things (IoT) is a technology used to provide smarter services to users by connecting various devices connected to the Internet and allowing these devices to exchange information with each other. IoT has been identified as an emerging technology in many IT trend reports [1], and the number of IoT devices is expected to grow rapidly [2,3]. Some IT trend reports predict that the global IoT market will be worth $14.4 trillion by 2022 [3,4]. As the number of IoT devices are increasing steeply, the interconnection between the different types of IoT devices becomes a key issue for the success of IoT. IoT standards bodies have made various attempts to solve the interconnection issue. For example, the development of a standardized IoT service layer platform interconnecting various industry driven IoT technologies is a most promising activity led by global IoT standards bodies such as oneM2M [5]. Several standards bodies are aiming at the development of IoT markets by transforming the fragmented vertical platforms of the past into a horizontal platform. ITU-T and IEEE P2413 are trying to standardize a high-level architecture framework for IoT whereas industry alliances such as Allseen Alliance,1 Open Connectivity Foundation (OCF),2 and IPSO Alliance3 are focusing on supporting the connectivity of local IoT devices. Among them oneM2M is a standard partnership project founded in 2012 by standards developing organizations (SDOs) of each country including TTA (Korea), ETSI (Europe), TIA, ATIS (USA), TTC, ARIB (Japan), CCSA (China) and India (TDSI) [6]. The main objective of oneM2M is to define a common service platform that can support various IoT application services such as Smart Home, Smart Car, and Smart Healthcare [7,8]. In order to provide interoperability and interworking, oneM2M has been developing various specifications. An interworking proxy entity is introduced to interconnect various local connectivity protocols [9]. Semantics technologies that have been developed for the Semantic Web are introduced as a way to describe the meaning of oneM2M resources. In addition, oneM2M is currently working on developing standard documentations for interoperability and conformance testing. In this paper, we provide an introduction to such standards activities for interoperability in oneM2M together with future directions. In summary, the main contributions of this paper are as follows: – Introduction to a global IoT service layer standards project called oneM2M, and its latest activities related to standards. – New interworking features with other local area connectivity standards to extend the IoT ecosystem. – Testing activities ensuring interoperability between IoT products and conformity to oneM2M specifications. In the following sections, we first provide an introduction to oneM2M and its Release 1 development in Section 2. We then explain interworking standards activities in oneM2M Release 2 in Section 3 followed by introducing oneM2M testing in Section 4. Finally, Section 5 presents the conclusion and future direction of oneM2M.