Abstract
Providing Internet of Things (IoT) environments with service level guarantee is a challenging task for improving IoT application usage experience. We specify in this paper an IoT architecture enabling an IoT Service Level Agreement (iSLA) achievement between an IoT Service Provider (IoT-SP) and an IoT Client (IoT-C). In order to guarantee the IoT applications’ requirements, Quality of Service (QoS) mechanisms should be implemented within all the layers of the IoT architecture. Thus, we propose a specific mechanism for the lowest layer of our service level based IoT architecture (i.e., sensing layer). It is an adaptation of the IEEE 802.15.4 slotted CSMA/CA mechanism enabling to take into consideration the requirements of real-time IoT services. Our access method called QBAIoT (QoS based Access for IoT) extends IEEE 802.15.4 systems by creating a new contention access period for each specified traffic class in the iSLA. Furthermore, due to the huge number of IoT connected devices, self-configuring capability provisioning is necessary for limiting human intervention and total cost of ownership (TCO). Thus, we integrate a self-configuring capability to the QBAIoT access method by implementing the MAPE-K closed control loop within the IoT High Level Gateway (HL-Gw) of our proposed QoS based IoT architecture.
Highlights
Internet of Things (IoT) is nowadays evident in our everyday life
We aim to present the design details and performance evaluation of our proposed QBAIoT access method and its usage in an IoT architecture in order to satisfy the requirements of an e-health service according to a proposed IoT Service Level Agreement (iSLA)
We consider an e-health service belonging to the real-time mission-critical class and we describe how to establish the corresponding iSLA within our IoT architecture in order to satisfy the requirements of such application
Summary
Internet of Things (IoT) is nowadays evident in our everyday life. We estimate the economic impact of the IoT to be between $3.9 and $11 trillion dollars by 2025 [1]. We consider in this paper the QoS part of a service level and we specify a QoS mechanism enabling the guarantee of a service level prior to the IoT service subscription In this context, the IEEE 802.15.4 standard is used as a base for different communication technologies in the IoT environment and in the e-health application domain. We aim to present the design details and performance evaluation of our proposed QBAIoT access method and its usage in an IoT architecture in order to satisfy the requirements of an e-health service according to a proposed iSLA. We specify in the same section our proposed method enabling QoS based access for IoT environments and the corresponding self-configuring capability.
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