Ciclo di Seminari A+ - Terzo incontro
- Day - Time: 29 April 2020, h.10:00
- Place: Area della Ricerca CNR di Pisa - Room: C-29
Speakers
Referent
Abstract
Alberto Gotta - "TCP-based M2M traffic via random-access satellite links: throughput estimation"
Abstract: Provisioning of Internet of Things/machine-to-machine (M2M) services over satellite has been experiencing a continuous growth in the last few years, which is expected to further increase in the near future so as to meet the demands of users and enterprises. The design of a suitable network architecture is, hence, of paramount importance to properly take into account the requirements imposed by the technology available nowadays and to properly consider the interaction of the so-defined physical layer with transport and application layers. In this light, this paper analyzes the use case of TCP-based M2M services operating over DVB-RCS2 satellite links, where a contention resolution diversity slotted ALOHA access scheme is applied. The main goal of this paper is to provide a thorough understanding of the interactions of TCP and random access schemes, recognized as key elements to enable efficient M2M services over satellite. In this regard, this paper also develops a novel TCP throughput model, which has been validated through extensive simulation campaigns, proving the value of the proposed theoretical framework and its applicability to study the performance of M2M services in more general satellite scenarios. Provisioning of Internet of Things/machine-to-machine (M2M) services over satellite has been experiencing a continuous growth in the last few years, which is expected to further increase in the near future so as to meet the demands of users and enterprises. The design of a suitable network architecture is, hence, of paramount importance to properly take into account the requirements imposed by the technology available nowadays and to properly consider the interaction of the so-defined physical layer with transport and application layers. In this light, this paper analyzes the use case of TCP-based M2M services operating over DVB-RCS2 satellite links, where a contention resolution diversity slotted ALOHA access scheme is applied. The main goal of this paper is to provide a thorough understanding of the interactions of TCP and random access schemes, recognized as key elements to enable efficient M2M services over satellite. In this regard, this paper also develops a novel TCP throughput model, which has been validated through extensive simulation campaigns, proving the value of the proposed theoretical framework and its applicability to study the performance of M2M services in more general satellite scenarios.
Fabio Paternò - "Supporting end-user debugging of trigger-action rules for IoT applications"
Abstract: End users need tools to enable them to control and personalise Internet of Things (IoT) applications, which may involve hundreds of interconnected objects. Trigger-action programming has shown to be a useful support for this purpose because it allows users to easily associate dynamic events with the activation of desired effects. End User Development (EUD) tools aim to allow even users without programming experience to define the behaviour of IoT applications. However, users may define rules triggering various actions that may be in conflict, or may specify rules that do not result in the intended behaviour. Although such situations can often occur, there seems to be a lack of tools able to help users understand whether the specified rules actually bring about the desired behaviour and, if not, the reasons why they fail. We present an original solution for filling this gap, which takes into account the specific aspects of trigger-action rules. We describe the design and implementation of this debugging support, and then discuss the results of a first user test.