Abstract
Although numerous consumer devices use Transmission Control Protocol/Internet Protocol (TCP/IP) protocol stack to connect and communicate over the Internet, their integration into a single Internet of Things (IoT) solution represents a challenge, primarily due to the lack of the standardized interoperability framework on the application layer. Devices produced by different manufacturers cannot operate together out of the box, thus raising the cost of system setup and maintenance. In this paper, a novel protocol is proposed that aims to bridge this gap. It is based on Message Queuing Telemetry Transport (MQTT) protocol and allows the seamless integration of different kinds of IP devices into the connected system. The proposed protocol is complete as it covers the aspects of device discovery and association in the IoT network. It provides mechanisms for IoT network maintenance and defines the abstract device model and communication patterns to enable system-wide device interoperability. The other goal of the protocol is to be portable to resource-constrained platforms. To validate the proposed protocol, it was integrated into the existing smart home hub, and for testing and validation purposes, prototype devices were developed.
Highlights
Complex Internet of Things (IoT) solutions, such as smart homes, fitness and health tracking systems, or assisted living systems, usually comprise of a number of heterogeneous devices
The technology presented in this paper aims to bridge this gap by providing a scalable, universal protocol, covering the entire life cycle of a connected device
This paper proposes a WISE protocol stack, designed to be a complete solution for IP device integration into the IoT system, and yet lightweight enough to be used on resourceconstrained platforms
Summary
Complex IoT solutions, such as smart homes, fitness and health tracking systems, or assisted living systems, usually comprise of a number of heterogeneous devices. There is already a number of specialized wireless IoT protocol stacks, which are adopted by consumer electronics manufacturers, and which provide the device abstraction on the application layer, define the uniform representation of device capabilities, and the standardized format of messages exchanged between the devices [2]–[4]. Some device developers choose to use IP due to the availability of existing home or corporate infrastructure, communication modules, and their familiarity with the technology. Such solutions rely on the WiFi connection to communicate with the rest of the network, as it requires no network cabling and provides the mobility of the end device.
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