The Internet of Things (IoT) enables the number of connected devices to be increased rapidly based on heterogeneous technologies such as platforms, frameworks, libraries, protocols, and standard specifications. Based on the connected devices, various applications can be developed by integrating domain-specific contents using the service composition for providing improved services. The management of the information including devices, contents, and composite objects is necessary to represent the physical objects on the Internet for accessing the IoT services transparently. In this paper, we propose an integrated service composition approach based on multiple service providers to provide improved IoT services by combining various service objects in heterogeneous IoT networks. In the proposed IoT architecture, each service provider provides web services based on Representational State Transfer (REST) Application Programming Interface (API) that delivers information to the clients as well as other providers for integrating the information to provide new services. Through the REST APIs, the integration management provider combines the service result of the IoT service provider to other contents to provide improved services. Moreover, the interworking proxy is proposed to bridge heterogeneous IoT networks for enabling transparent access in the integrated services through proving protocol translating on the entry of the device networks. Therefore, the interworking proxy is deployed between the IoT service provider and device networks to enable clients to access heterogeneous IoT devices through the composited services transparently.

中文翻译：

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基于透明接入多个服务提供商的异构物联网网络的综合服务组合方法

物联网 (IoT) 使基于平台、框架、库、协议和标准规范等异构技术的连接设备数量快速增加。基于连接的设备，可以通过使用服务组合集成特定领域的内容来开发各种应用程序，以提供改进的服务。对包括设备、内容和复合对象在内的信息的管理是必要的，以透明地表示互联网上的物理对象以透明地访问物联网服务。在本文中，我们提出了一种基于多个服务提供商的集成服务组合方法，通过组合异构物联网网络中的各种服务对象来提供改进的物联网服务。在提议的物联网架构中，每个服务提供者提供基于具象状态传输 (REST) 应用程序编程接口 (API) 的 Web 服务，该接口将信息传递给客户端以及其他提供者以集成信息以提供新服务。通过REST API，集成管理提供者将物联网服务提供者的服务结果与其他内容相结合，以提供改进的服务。此外，还提出了互通代理来桥接异构物联网网络，通过在设备网络入口处证明协议转换来实现集成服务中的透明访问。因此，在物联网服务提供商和设备网络之间部署互通代理，使客户端能够通过组合服务透明地访问异构物联网设备。