Delay- and Disruption Tolerant Networks (DTNs) are based on an overlay protocol the store-carry-forward paradigm. In practice, each DTN node can store information for a long time before forwarding it. DTNs particularly suited to cope with challenges imposed by space environment. This paper is focused routing in DTNs, particular contact graph (CGR) its most representative enhancements, available literature, which briefly surveyed this work. Moreover, applicability obtained performance of...

Satellite communications are characterized by long delays, packet losses, and sometimes intermittent connectivity link disruptions. The TCP/IP stack is ineffective against these impairments even dedicated solutions, such as performance enhancing proxies (PEPs), can hardly tackle the most challenging environments, create compatibility issues with current security protocols. An alternative solution arises from delay- disruption-tolerant networking (DTN) architecture, which specifies an overlay...

The envisioned 5G ecosystem will be composed of heterogeneous networks based on different technologies and communication means, including satellite networks. latter can help increase the capabilities terrestrial networks, especially in terms higher coverage, reliability, availability, contributing to achievement some KPIs. However, technological changes are not immediate. Many current proprietary hardware, which hinders integration with future as well adoption new protocols algorithms. On...

Multiple distributed controllers have been used in software-defined networks (SDNs) to improve scalability and reliability, where each controller manages one static partition of the network. In this paper, we show that dynamic mapping between switches can efficiency managing traffic load variations. particular, propose balanced (BalCon) BalConPlus, two SDN switch migration schemes achieve balance among with small cost. BalCon is suitable for scenarios network does not require a serial...

Summary The space environment is still challenging but becoming more and attractive for an increasing number of entities. In the second half 20th century, a huge amount funds was required to build satellites gain access space. Nowadays, it no longer so. advancement technologies allows producing very small hardware components able survive strict conditions outer Consequently, can be designed wide set missions keeping low design times, production costs, deployment costs. One widely used type...

The rate of traffic generated by MTC is growing at a very fast pace, putting strong pressure on existing network infrastructures. One the most challenging tasks today being able to support M2M/IoT data exchanges providing connectivity between any pair M2M devices all over world. For this reason, we analyze role SINs in supporting work. Horizontal solutions are analyzed herein order allow interworking acting as relay entities among different protocol stacks and services, vertically...

Mega-LEO satellite constellations are becoming a concrete reality. Companies such as SpaceX, Virgin Orbit, and OneWeb have already started launching hundreds of LEO satellites turning their services on. Even if the aim is just, for now, to offer worldwide Internet access equality, deployment proves feasibility suggests usefulness further purposes. In this article, we shed some light on possible integration in-network computing paradigm in mega-LEO constellations. Terrestrial and/or...

Indoor localization of targets by using electromagnetic waves has attracted a lot attention in the last few years. Thanks to wide availability sources deployed for various applications (e.g., WiFi), nowadays it is possible perform this task low-cost mobile devices, such as smartphones. To end, order achieve high positioning accuracy and reduce computational resources used position estimation, fingerprinting approaches are usually employed. However, case, time-consuming training phase, where...

This paper proposes a system that allows recognizing person's emotional state starting from audio signal registrations. The provided solution is aimed at improving the interaction among humans and computers, thus allowing effective human-computer intelligent interaction. able to recognize six emotions(anger, boredom, disgust, fear, happiness, sadness) neutral state. set of states widely used for emotion recognition purposes. It also distinguishes single versus all other possible ones, as...

Summary Intrusion detection systems (IDS) are aimed at analyzing and detecting security problems. The IDS may be structured into misuse anomaly detection. former often signature/rule that detect malicious software by inspecting the content of packets or files looking for a “signature” labeling malware. They very efficient, but their drawback stands in weakness information to check (eg, signature), which quickly dated, computation time because each packet file needs inspected. based on and,...

Recently, random access protocols have acquired a new wave of interest, not only from the satellite communication community, but also researchers active in fields, such as Internet Things and machine-to-machine. Asynchronous (slot- frame-wise) ALOHA-like protocols, are very attractive for applications, enabling low complexity transmitters avoiding time synchronization requirements. Evolutions ALOHA employ diversity through proactive replication packets, is fully exploited at receiver....

The way of generating and distributing energy throughout the electrical grid to all users is evolving. concept Smart Grid (SG) took place enhance management infrastructure its functionalities from traditional system an improved one. To measure consumption one these that, in some countries, has already evolved a periodical manual reading more frequent automatic one, leading Metering (SM). Technology improvement could be applied SM systems allow, on hand, efficient collect data each user, and,...

This paper proposes a new location recognition algorithm for automatic check-in applications (LRACI), suited to be implemented within Smartphones, integrated in the Cloud platform and representing service end users. The algorithm, performance of which is independent employed device, uses both global hybrid positioning systems (GPS/HPS) and, an opportunistic way, presence Wi-Fi access points (APs), through definition FingerPrint (FP), proposed this paper. FP considers order relation among...

Summary Heart failure is a chronic disease that alternates intense and weak phases requires repeated frequent hospital treatments. The use of automatic instruments for remote ubiquitous monitoring biological parameters relevant to heart pathophysiology offers new perspectives improve the patients' quality life efficacy treatment. platform described in this paper represents an implementation tool where smartphones play crucial role. They are not employed just communicate through traditional...

Scalability and reliability are among the main concerns in large-scale Software Defined Networking (SDN) application scenarios. A common approach is to use multiple distributed controllers, each managing one static partition of network. In this paper, we show that dynamic mapping can improve efficiency traffic load variations. We then propose BalCon (Balanced Controller): an algorithmic solution designed tackle reduce imbalance SDN controllers through proper switch migrations. Simulations...

Recently, patients suffering from a set of physical and mental limitations, called co-morbidities, are often treated at home. In this environment, modern communication systems represent great support to implement Ambient Assisted Living platforms aimed monitoring home because they enable the seamless integration heterogeneous sensing units, medical devices, ubiquitous access data. This article describes specific smartphone-centric architecture where smartphones employed not only as hubs...

Intrusion Detection Systems (IDS) are aimed at analyzing and detecting security problems. IDS based on anomaly detection and, in particular, statistical analysis, inspect each traffic flow order to get its characterization, which represents the fingerprint of flow. Software Defined Networking (SDN) is revolutionizing networking industry by enabling programmability, easier management faster innovation. These benefits made possible centralized control plane architecture allows network be...

This paper presents a novel network architecture for an integrated nanosatellite (nSAT)-5G system operating in the millimeter-wave (mmWave) domain. The is realized adopting delay/disruption tolerant networking (DTN) approach allowing end users to adopt standard devices. A buffer aware contact graph routing algorithm designed account occupancy of nSATs and connection planning derived from their visibility periods. At terrestrial uplink, coded random access employed realize high-capacity...

The problem of bandwidth allocation may be simply stated, independently the target allocation: an amount must shared among different entities. Each entity receives a portion overall bandwidth. Bandwidth formalized as Multi-Objective Programming (MOP) where constraint is maximum available objectives such loss and power modelled through group objective functions possibly contrasting with each other. It quite intuitive that using more will reduce losses, but also transmitted increase Which...