Abstract
IoT-based applications operate in a client–server architecture, which requires a specific communication protocol. This protocol is used to establish the client–server communication model, allowing all clients of the system to perform specific tasks through internet communications. Many data communication protocols for the Internet of Things are used by IoT platforms, including message queuing telemetry transport (MQTT), advanced message queuing protocol (AMQP), MQTT for sensor networks (MQTT-SN), data distribution service (DDS), constrained application protocol (CoAP), and simple object access protocol (SOAP). These protocols only support single-topic messaging. Thus, in this work, an IoT message protocol that supports multi-topic messaging is proposed. This protocol will add a simple “brain” for IoT platforms in order to realize an intelligent IoT architecture. Moreover, it will enhance the traffic throughput by reducing the overheads of messages and the delay of multi-topic messaging. Most current IoT applications depend on real-time systems. Therefore, an RTOS (real-time operating system) as a famous OS (operating system) is used for the embedded systems to provide the constraints of real-time features, as required by these real-time systems. Using RTOS for IoT applications adds important features to the system, including reliability. Many of the undertaken research works into IoT platforms have only focused on specific applications; they did not deal with the real-time constraints under a real-time system umbrella. In this work, the design of the multi-topic IoT protocol and platform is implemented for real-time systems and also for general-purpose applications; this platform depends on the proposed multi-topic communication protocol, which is implemented here to show its functionality and effectiveness over similar protocols.
Highlights
The proliferation of wireless connectivity in Internet of that is widely used for interconnecting devices (Things) (IoT) devices is rapidly expanding.This is leading to the launch and integration of many Internet of Things (IoT) services and applications
Many of the undertaken research works into IoT platforms have only focused on specific applications; they did not deal with the real-time constraints under a real-time system umbrella
message queuing telemetry transport (MQTT) is suitable for embedded real-time systems, the feature of multi-topic messaging is not supported by the protocol
Summary
The proliferation of wireless connectivity in Internet of Things (IoT) devices is rapidly expanding. Despite the limited research into the intelligent IoT field [4], there are many applications of the technology in different directions such as smart homes and cities [5], drone applications [6], agriculture and farming Another IoT domain—called the cognitive domain—adds computing algorithms and mechanisms to IoT platforms so that the system devices can make decisions and actions [7]. We decided to design an IoT platform from scratch to support real-time applications; the simulation and real implementation results are discussed after implementing the IoT protocol based on the proposed architecture. In our research, an IoT platform based on RTOS will be implemented using the proposed multi-topic communication protocol.
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