Paolo Bellavista | AICCON - Associazione Italiana per la Promozione della Cultura della Cooperazione e del Non Profit (original) (raw)

Papers by Paolo Bellavista

Research paper thumbnail of Converging Mobile Edge Computing, Fog Computing, and IoT Quality Requirements

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Efficient Exploitation of Mobile Edge Computing for Virtualized 5G in EPC Architectures

To pave the way towards disclosing the full potential of 5G networking, emerging Mobile Edge Comp... more To pave the way towards disclosing the full potential of 5G networking, emerging Mobile Edge Computing techniques are gaining momentum in both academic and industrial research as a means to enhance infrastructure scalability and reliability by moving control functions close to the edge of the network. After the promising results under achievement within the EU Mobile Cloud Networking project, we claim the suitability of deploying Evolved Packet Core (EPC) support solutions as a Service (EPCaaS) over a uniform edge cloud infrastructure of Edge Nodes, by following the concepts of Network Function Virtualization (NFV). This paper originally focuses on the support needed for efficient elasticity provisioning of EPCaaS stateful components, by proposing novel solutions for effective subscribers' state management in quality-constrained 5G scenarios. In particular, to favor flexibility and high-availability against network function failures, we have developed a state sharing mechanism across different data centers even in presence of firewall/network encapsulation. In addition, our solution can dynamically select which state portions should be shared and to which Edge Nodes. The reported experimental results, measured over the widely recognized Open5GCore testbed, demonstrate the feasibility and effectiveness of the approach, as well as its capability to satisfy "carrier-grade" quality requirements while ensuring good elasticity and scalability.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of DRIVE: Discovery seRvice for fully-Integrated 5G enVironmEnt in the IoT

A lot of research is being carried out about Internet of Things (IoT) and in the following years ... more A lot of research is being carried out about Internet of Things (IoT) and in the following years it will emerge more and more in our lives. Furthermore, with the advent of future fully-integrated 5G networks, new constraints need to be satisfied such as ultra-reliability and low-latency. With the help of Fog computing and the Multi-access Edge Computing (MEC) framework, services can be offered to the end users in a fast and practical way. Our work presents DRIVE a framework for service discovery in a 5G environment. However, in order to guarantee dynamic distribution and best management of services, we plan to deploy those services as container (e.g. Docker container). Moreover, we propose distribution of edge services at three different layer of communication: Application, Service, and Communication Layer. Given the above considerations, we propose an edge node, placed at the edge of network, that acts as the "brain" and take over the computation. The main innovative elements of the proposed framework, compared to the existing literature, include the possibility to select the working layer, the dynamic reconfiguration of the edge node and the field experimental results about the performance achieved by our solution over rapidly deployable environments with resourcelimited edge nodes such as Raspberry Pi devices.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of MIINT: Middleware for IIoT Platforms Integration

2021 IEEE Global Communications Conference (GLOBECOM), Dec 1, 2021

In the last recent years Internet of Things has extended its adoption to the industrial manufactu... more In the last recent years Internet of Things has extended its adoption to the industrial manufacturing field. The digitalization of industry brings the new concept of Industry 4.0 to light. In fact, the enormous value for the companies generated from the adoption of Industrial IoT and Edge Computing has led to a vertiginous increments of IIoT platform demands. Therefore, world-wide big IT players and Foundations start to introduce their own flagship IIoT platforms into market. This multitude of platforms presents similar common features, but with different APIs. These platforms are hardly interoperable, and they are frequently bounded to their own vertical solution stack. To overcome these limitations, in this paper, we propose MIINT, a Middleware for IIoT platforms INTegration. MIINT groups the common functionalities of IIoT frameworks, and it integrates different platforms by providing standard access APIs. To prove the feasibility of MIINT, in this paper, we show an integration use case of Azure IoT and EdgeX Foundry IIoT platforms. Moreover, we also thoroughly assess MIINT by executing on the edge a field data reading functionality in the two considered IIoT platforms, by showing their advantages and limitations.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Meeting Stringent QoS Requirements in IIoT-based Scenarios

Bookmarks Related papers MentionsView impact

Research paper thumbnail of The Trap Coverage Area Protocol for Scalable Vehicular Target Tracking

IEEE Access, 2017

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Extensible Orchestration of Elastic IP Multimedia Subsystem as a Service Using Open Baton

Many recent projects and research activities in the telco sector are adopting the Cloud Computer ... more Many recent projects and research activities in the telco sector are adopting the Cloud Computer paradigm consolidating their infrastructures towards converged and all-IP next generation networks providing typical telco services within LTE (and soon 5G) and also fixed network environments, e.g., often still adopting IP Multimedia Subsystem (IMS) architecture solutions. In this perspective, cloud computing can significantly lower investment risks by implementing telco services with Virtual Network Functions (VNFs) on top of a Network Functions Virtualization (NFV) Infrastructure. Within this general context, this paper presents the implementation and integration work accomplished within the large EU FP7 Mobile Cloud Networking project (MCN, 2013-2016) to achieve cost-effective elasticity of IMS-based multimedia applications. The paper shows how it has been designed and implemented an elastic IMS-compliant solution by exploiting the widespread Asterisk server as media gateway. Quality monitoring and scale in/out triggering are obtained through the interaction between the MCN Monitoring as a Service (MaaS) and OpenBaton, i.e., a novel open-source NFV Orchestrator (NFVO) integrated in MCN and fully compliant with the ETSI NFV Management and Orchestration (MANO) specifications. The collected performance results of the proposed solution, demonstrates the fully feasibility of the approach adopted and explained in this paper.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of MQTT-Driven Node Discovery for Integrated IoT-Fog Settings Revisited: The Impact of Advertiser Dynamicity

The recent advances in telecommunications, wide availability of powerful and always-connected sma... more The recent advances in telecommunications, wide availability of powerful and always-connected smart devices, and the wide adoption of cloud computing services are paving the way towards the concept of fog computing. An outstanding problem in this area is the availability of effective application-layer protocols between service seekers and providers at the Internet of Things (IoT) level because most IoT nodes run on batteries. Hence, IoT-Fog discovery service must be energy efficient to prolong the lifetime of smart objects. This paper presents a thorough study of our previously proposed MQTT-driven IoT-fog integration, namely the Power Efficient Node Discovery (PEND), and investigates the impact of dynamic arrival patterns on its performance. The MQTT broker serves as a fog node to trigger turning on/off the Bluetooth Low Energy (BLE) interfaces of the surrounding objects by monitoring their trajectories. Furthermore it leverages this additional location awareness to significantly reduce the power consumption of the device discovery process for mobile devices. With this motivation, we present a detailed performance study of PEND under various settings and provide in-depth discussions of some lessons about the obtainable energy saving and the effectiveness of the our enhanced BLE device discovery solution. The results we present are valuable for the fog community to design new optimizations and to refine the whole IoT device discovery process to the purpose of better efficiency and scalability.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of A Social-Driven Edge Computing Architecture for Mobile Crowd Sensing Management

IEEE Communications Magazine, Apr 1, 2019

Bookmarks Related papers MentionsView impact

Research paper thumbnail of FlowChain: The Playground for Federated Learning in Industrial Internet of Things Environments

IEEE internet of things magazine, Jun 1, 2022

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Proximity discovery and data dissemination for mobile crowd sensing using LTE direct

Computer Networks, Dec 1, 2017

Bookmarks Related papers MentionsView impact

Research paper thumbnail of MQTT-Driven Sustainable Node Discovery for Internet of Things-Fog Environments

Consolidation of Internet of Things and Fog computing paradigms requires effective and efficient ... more Consolidation of Internet of Things and Fog computing paradigms requires effective and efficient application-layer protocols between service seekers and providers. As most of these nodes run on batteries, discovering service providing devices in an IoT-Fog environment has to be performed in an energy-efficient way. In this paper, we propose Power Efficient Node Discovery (PEND), which is an MQTT-driven IoT-fog integration solution for the sustainability of object discovery in a publish/subscribe environment. By enabling the MQTT broker to serve as a fog node to trigger turning on/off of the Bluetooth interfaces of subscriber objects, Bluetooth Low Energy Scanner (BLE-S), and to monitor the trajectories of publishers/advertisers, Bluetooth low Energy Advertiser (BLE-A), we introduce significant reduction in the Bluetooth, CPU, and process- specific power consumption of the mobile devices. The reduction in the battery drain by the BLE interface under the proposed scheme can be as low as 10%-20% of a naive, locality based discovery benchmark whereas the process specific battery drain of the proposed scheme can be as low as 55%-62% of the node discovery benchmark. Furthermore, with the synchronization of the publishers and subscribers at the fog layer entity, i.e., MQTT broker, 100% node discovery can be achieved by the scanning/service subscriber devices.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Integrated support for handoff management and context awareness in heterogeneous wireless networks

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Toward Privacy-Aware Healthcare Data Fusion Systems

Communications in computer and information science, 2019

Mobile wearable and sensor-enabled devices offer an opportunity for deluging unprecedented amount... more Mobile wearable and sensor-enabled devices offer an opportunity for deluging unprecedented amount of health-related data that is beneficial in health and caregiving research. Fusing data ingested throughout various heterogeneous channels is essential for better provisioning novel healthcare solutions. However, this is typically challenged by privacy-awareness. For example, the European Commission throughout its call-for-proposals always stresses a requirement that provisioned solutions should consider privacy and should boost security- and privacy-awareness in cloud computing environments. Current solutions either do not consider privacy requirements or provide solutions that are mostly ad hoc and patch efforts. In this position paper, we motivate the adoption of Blockchain technologies for providing privacy-awareness to novel healthcare data fusion solutions. Our envisioned solution is proposed on top of current state-of-the-art blockchain and big data representatives, specifically Hyperledger Fabric and Apache Spark.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Fog Node Placement in IoT Scenarios with Stringent QoS Requirements: Experimental Evaluation

Leveraging the Internet of Things (IoT) in intensive domains, such as in the Industrial Internet ... more Leveraging the Internet of Things (IoT) in intensive domains, such as in the Industrial Internet of Things (IIoT) or Internet of Medical Things (IoMT), provides automation and sensing solutions for complex environments through the interconnection of different sensors and actuators. However, these scenarios usually demand to meet stringent Quality of Service (QoS) requirements to work properly. Fog computing, a paradigm that brings computation and storage closer to the edge, and Software-Defined Networking (SDN), a networking paradigm that enables for network scalability and flexibility, can be combined. To do so, fog nodes that integrate both, computation resources and SDN capabilities, are leveraged to meet these stringent needs. Clearly, the placement of such fog nodes plays a key role in the achieved QoS. In this paper, an optimal fog node placement formulation is evaluated in an emulated fog and SDN environment. Results show that an optimal fog node placement can achieve a reduction of up to 59% in the network latency with a minimal jitter compared with other well-known placement methods.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Analysis of Growth Strategies in Social Media: The Instagram Use Case

Social Networking describes the phenomena found in participatory and self-expressive Web sites—su... more Social Networking describes the phenomena found in participatory and self-expressive Web sites—such as YouTube, Facebook and Instagram. Online communities represent a growing class of marketplace communities where participants can provide and exchange information on products, services, or common interests. Exploiting the phenomena, companies, artists, and new professional figures as influencers, youtubers and resellers, are increasingly using online communities to create value for their firms and customers, ensuring that their activities are relevant to the social network audience. However, from a marketing perspective, being able to distinguish a brand or an original work in a sea of competitors is a difficult challenge. From a more economic perspective, having a social media plan and strategy in place is becoming a must. At the same time, from the technical perspective, becoming popular in those platforms it is not so easy. This paper presents a seminal effort to investigate some strategies to growth on Instagram without using promotion tools. In particular, we studied how "Benign" Social Bots, using the provided platform APIs, can affect the Social Media world. Our experimental results assess and benchmark the effectiveness of some approaches, increasing the diffusion of users content on the Social Media and consequentially speeding up growth.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of SpatialSSJP: QoS-Aware Adaptive Approximate Stream-Static Spatial Join Processor

IEEE Transactions on Parallel and Distributed Systems, Dec 31, 2023

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Enhancing the Scalability of IMS-Based Presence Service for LBS Applications

2009 33rd Annual IEEE …, 2009

... rule-based implementation. LBE, instead, sends remote DB queries to update IMS client profile... more ... rule-based implementation. LBE, instead, sends remote DB queries to update IMS client profiles, executes Linux activation bash scripts remotely via SSH, and manages DNS component registrations. For each de-/activated ...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Efficiently managing location information with privacy requirements in Wi-Fi networks: a middleware approach

International Symposium on Wireless Communication Systems, 2005

The growing availability of wireless portable devices is leveraging the diffusion of location bas... more The growing availability of wireless portable devices is leveraging the diffusion of location based services (LBSs) that provide service contents depending on the current position of clients, servers, and involved distributed resources. When a wide public of final users use LBSs, two primary issues are crucial: how to guarantee the proper level of user privacy given the need to disclose,

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Mobile agent middleware for mobile computing

Computer, 2001

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Converging Mobile Edge Computing, Fog Computing, and IoT Quality Requirements

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Efficient Exploitation of Mobile Edge Computing for Virtualized 5G in EPC Architectures

To pave the way towards disclosing the full potential of 5G networking, emerging Mobile Edge Comp... more To pave the way towards disclosing the full potential of 5G networking, emerging Mobile Edge Computing techniques are gaining momentum in both academic and industrial research as a means to enhance infrastructure scalability and reliability by moving control functions close to the edge of the network. After the promising results under achievement within the EU Mobile Cloud Networking project, we claim the suitability of deploying Evolved Packet Core (EPC) support solutions as a Service (EPCaaS) over a uniform edge cloud infrastructure of Edge Nodes, by following the concepts of Network Function Virtualization (NFV). This paper originally focuses on the support needed for efficient elasticity provisioning of EPCaaS stateful components, by proposing novel solutions for effective subscribers' state management in quality-constrained 5G scenarios. In particular, to favor flexibility and high-availability against network function failures, we have developed a state sharing mechanism across different data centers even in presence of firewall/network encapsulation. In addition, our solution can dynamically select which state portions should be shared and to which Edge Nodes. The reported experimental results, measured over the widely recognized Open5GCore testbed, demonstrate the feasibility and effectiveness of the approach, as well as its capability to satisfy "carrier-grade" quality requirements while ensuring good elasticity and scalability.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of DRIVE: Discovery seRvice for fully-Integrated 5G enVironmEnt in the IoT

A lot of research is being carried out about Internet of Things (IoT) and in the following years ... more A lot of research is being carried out about Internet of Things (IoT) and in the following years it will emerge more and more in our lives. Furthermore, with the advent of future fully-integrated 5G networks, new constraints need to be satisfied such as ultra-reliability and low-latency. With the help of Fog computing and the Multi-access Edge Computing (MEC) framework, services can be offered to the end users in a fast and practical way. Our work presents DRIVE a framework for service discovery in a 5G environment. However, in order to guarantee dynamic distribution and best management of services, we plan to deploy those services as container (e.g. Docker container). Moreover, we propose distribution of edge services at three different layer of communication: Application, Service, and Communication Layer. Given the above considerations, we propose an edge node, placed at the edge of network, that acts as the "brain" and take over the computation. The main innovative elements of the proposed framework, compared to the existing literature, include the possibility to select the working layer, the dynamic reconfiguration of the edge node and the field experimental results about the performance achieved by our solution over rapidly deployable environments with resourcelimited edge nodes such as Raspberry Pi devices.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of MIINT: Middleware for IIoT Platforms Integration

2021 IEEE Global Communications Conference (GLOBECOM), Dec 1, 2021

In the last recent years Internet of Things has extended its adoption to the industrial manufactu... more In the last recent years Internet of Things has extended its adoption to the industrial manufacturing field. The digitalization of industry brings the new concept of Industry 4.0 to light. In fact, the enormous value for the companies generated from the adoption of Industrial IoT and Edge Computing has led to a vertiginous increments of IIoT platform demands. Therefore, world-wide big IT players and Foundations start to introduce their own flagship IIoT platforms into market. This multitude of platforms presents similar common features, but with different APIs. These platforms are hardly interoperable, and they are frequently bounded to their own vertical solution stack. To overcome these limitations, in this paper, we propose MIINT, a Middleware for IIoT platforms INTegration. MIINT groups the common functionalities of IIoT frameworks, and it integrates different platforms by providing standard access APIs. To prove the feasibility of MIINT, in this paper, we show an integration use case of Azure IoT and EdgeX Foundry IIoT platforms. Moreover, we also thoroughly assess MIINT by executing on the edge a field data reading functionality in the two considered IIoT platforms, by showing their advantages and limitations.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Meeting Stringent QoS Requirements in IIoT-based Scenarios

Bookmarks Related papers MentionsView impact

Research paper thumbnail of The Trap Coverage Area Protocol for Scalable Vehicular Target Tracking

IEEE Access, 2017

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Extensible Orchestration of Elastic IP Multimedia Subsystem as a Service Using Open Baton

Many recent projects and research activities in the telco sector are adopting the Cloud Computer ... more Many recent projects and research activities in the telco sector are adopting the Cloud Computer paradigm consolidating their infrastructures towards converged and all-IP next generation networks providing typical telco services within LTE (and soon 5G) and also fixed network environments, e.g., often still adopting IP Multimedia Subsystem (IMS) architecture solutions. In this perspective, cloud computing can significantly lower investment risks by implementing telco services with Virtual Network Functions (VNFs) on top of a Network Functions Virtualization (NFV) Infrastructure. Within this general context, this paper presents the implementation and integration work accomplished within the large EU FP7 Mobile Cloud Networking project (MCN, 2013-2016) to achieve cost-effective elasticity of IMS-based multimedia applications. The paper shows how it has been designed and implemented an elastic IMS-compliant solution by exploiting the widespread Asterisk server as media gateway. Quality monitoring and scale in/out triggering are obtained through the interaction between the MCN Monitoring as a Service (MaaS) and OpenBaton, i.e., a novel open-source NFV Orchestrator (NFVO) integrated in MCN and fully compliant with the ETSI NFV Management and Orchestration (MANO) specifications. The collected performance results of the proposed solution, demonstrates the fully feasibility of the approach adopted and explained in this paper.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of MQTT-Driven Node Discovery for Integrated IoT-Fog Settings Revisited: The Impact of Advertiser Dynamicity

The recent advances in telecommunications, wide availability of powerful and always-connected sma... more The recent advances in telecommunications, wide availability of powerful and always-connected smart devices, and the wide adoption of cloud computing services are paving the way towards the concept of fog computing. An outstanding problem in this area is the availability of effective application-layer protocols between service seekers and providers at the Internet of Things (IoT) level because most IoT nodes run on batteries. Hence, IoT-Fog discovery service must be energy efficient to prolong the lifetime of smart objects. This paper presents a thorough study of our previously proposed MQTT-driven IoT-fog integration, namely the Power Efficient Node Discovery (PEND), and investigates the impact of dynamic arrival patterns on its performance. The MQTT broker serves as a fog node to trigger turning on/off the Bluetooth Low Energy (BLE) interfaces of the surrounding objects by monitoring their trajectories. Furthermore it leverages this additional location awareness to significantly reduce the power consumption of the device discovery process for mobile devices. With this motivation, we present a detailed performance study of PEND under various settings and provide in-depth discussions of some lessons about the obtainable energy saving and the effectiveness of the our enhanced BLE device discovery solution. The results we present are valuable for the fog community to design new optimizations and to refine the whole IoT device discovery process to the purpose of better efficiency and scalability.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of A Social-Driven Edge Computing Architecture for Mobile Crowd Sensing Management

IEEE Communications Magazine, Apr 1, 2019

Bookmarks Related papers MentionsView impact

Research paper thumbnail of FlowChain: The Playground for Federated Learning in Industrial Internet of Things Environments

IEEE internet of things magazine, Jun 1, 2022

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Proximity discovery and data dissemination for mobile crowd sensing using LTE direct

Computer Networks, Dec 1, 2017

Bookmarks Related papers MentionsView impact

Research paper thumbnail of MQTT-Driven Sustainable Node Discovery for Internet of Things-Fog Environments

Consolidation of Internet of Things and Fog computing paradigms requires effective and efficient ... more Consolidation of Internet of Things and Fog computing paradigms requires effective and efficient application-layer protocols between service seekers and providers. As most of these nodes run on batteries, discovering service providing devices in an IoT-Fog environment has to be performed in an energy-efficient way. In this paper, we propose Power Efficient Node Discovery (PEND), which is an MQTT-driven IoT-fog integration solution for the sustainability of object discovery in a publish/subscribe environment. By enabling the MQTT broker to serve as a fog node to trigger turning on/off of the Bluetooth interfaces of subscriber objects, Bluetooth Low Energy Scanner (BLE-S), and to monitor the trajectories of publishers/advertisers, Bluetooth low Energy Advertiser (BLE-A), we introduce significant reduction in the Bluetooth, CPU, and process- specific power consumption of the mobile devices. The reduction in the battery drain by the BLE interface under the proposed scheme can be as low as 10%-20% of a naive, locality based discovery benchmark whereas the process specific battery drain of the proposed scheme can be as low as 55%-62% of the node discovery benchmark. Furthermore, with the synchronization of the publishers and subscribers at the fog layer entity, i.e., MQTT broker, 100% node discovery can be achieved by the scanning/service subscriber devices.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Integrated support for handoff management and context awareness in heterogeneous wireless networks

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Toward Privacy-Aware Healthcare Data Fusion Systems

Communications in computer and information science, 2019

Mobile wearable and sensor-enabled devices offer an opportunity for deluging unprecedented amount... more Mobile wearable and sensor-enabled devices offer an opportunity for deluging unprecedented amount of health-related data that is beneficial in health and caregiving research. Fusing data ingested throughout various heterogeneous channels is essential for better provisioning novel healthcare solutions. However, this is typically challenged by privacy-awareness. For example, the European Commission throughout its call-for-proposals always stresses a requirement that provisioned solutions should consider privacy and should boost security- and privacy-awareness in cloud computing environments. Current solutions either do not consider privacy requirements or provide solutions that are mostly ad hoc and patch efforts. In this position paper, we motivate the adoption of Blockchain technologies for providing privacy-awareness to novel healthcare data fusion solutions. Our envisioned solution is proposed on top of current state-of-the-art blockchain and big data representatives, specifically Hyperledger Fabric and Apache Spark.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Fog Node Placement in IoT Scenarios with Stringent QoS Requirements: Experimental Evaluation

Leveraging the Internet of Things (IoT) in intensive domains, such as in the Industrial Internet ... more Leveraging the Internet of Things (IoT) in intensive domains, such as in the Industrial Internet of Things (IIoT) or Internet of Medical Things (IoMT), provides automation and sensing solutions for complex environments through the interconnection of different sensors and actuators. However, these scenarios usually demand to meet stringent Quality of Service (QoS) requirements to work properly. Fog computing, a paradigm that brings computation and storage closer to the edge, and Software-Defined Networking (SDN), a networking paradigm that enables for network scalability and flexibility, can be combined. To do so, fog nodes that integrate both, computation resources and SDN capabilities, are leveraged to meet these stringent needs. Clearly, the placement of such fog nodes plays a key role in the achieved QoS. In this paper, an optimal fog node placement formulation is evaluated in an emulated fog and SDN environment. Results show that an optimal fog node placement can achieve a reduction of up to 59% in the network latency with a minimal jitter compared with other well-known placement methods.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Analysis of Growth Strategies in Social Media: The Instagram Use Case

Social Networking describes the phenomena found in participatory and self-expressive Web sites—su... more Social Networking describes the phenomena found in participatory and self-expressive Web sites—such as YouTube, Facebook and Instagram. Online communities represent a growing class of marketplace communities where participants can provide and exchange information on products, services, or common interests. Exploiting the phenomena, companies, artists, and new professional figures as influencers, youtubers and resellers, are increasingly using online communities to create value for their firms and customers, ensuring that their activities are relevant to the social network audience. However, from a marketing perspective, being able to distinguish a brand or an original work in a sea of competitors is a difficult challenge. From a more economic perspective, having a social media plan and strategy in place is becoming a must. At the same time, from the technical perspective, becoming popular in those platforms it is not so easy. This paper presents a seminal effort to investigate some strategies to growth on Instagram without using promotion tools. In particular, we studied how "Benign" Social Bots, using the provided platform APIs, can affect the Social Media world. Our experimental results assess and benchmark the effectiveness of some approaches, increasing the diffusion of users content on the Social Media and consequentially speeding up growth.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of SpatialSSJP: QoS-Aware Adaptive Approximate Stream-Static Spatial Join Processor

IEEE Transactions on Parallel and Distributed Systems, Dec 31, 2023

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Enhancing the Scalability of IMS-Based Presence Service for LBS Applications

2009 33rd Annual IEEE …, 2009

... rule-based implementation. LBE, instead, sends remote DB queries to update IMS client profile... more ... rule-based implementation. LBE, instead, sends remote DB queries to update IMS client profiles, executes Linux activation bash scripts remotely via SSH, and manages DNS component registrations. For each de-/activated ...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Efficiently managing location information with privacy requirements in Wi-Fi networks: a middleware approach

International Symposium on Wireless Communication Systems, 2005

The growing availability of wireless portable devices is leveraging the diffusion of location bas... more The growing availability of wireless portable devices is leveraging the diffusion of location based services (LBSs) that provide service contents depending on the current position of clients, servers, and involved distributed resources. When a wide public of final users use LBSs, two primary issues are crucial: how to guarantee the proper level of user privacy given the need to disclose,

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Mobile agent middleware for mobile computing

Computer, 2001

Bookmarks Related papers MentionsView impact