The increasing complexity of wireless standards has shown that protocols cannot be designed once for all possible deployments, especially when unpredictable and mutating interference situations are present due to the coexistence heterogeneous technologies. As such, flexibility (re)programmability devices is crucial in emerging scenarios technology proliferation conditions. In this paper, we focus on possibility improve performance WiFi ZigBee networks by exploiting novel programmable...

Programmable wireless platforms aim at responding to the quest for access flexibility and adaptability. This paper introduces notion of MAC processors. Instead implementing a specific protocol stack, Wireless processors do support set Medium Access Control "commands" which can be run-time composed (programmed) through software-defined state machines, thus providing desired operation. We clearly distinguish from related work in this area as, unlike other works rely on dedicated DSPs or...

In recent years, we have assisted with an impressive advance in augmented reality systems and computer vision algorithms, based on image processing artificial intelligence. Thanks to these technologies, mainstream smartphones are able estimate their own motion 3D space high accuracy. this paper, exploit such technologies support the autonomous mobility of people visual disabilities, identifying pre-defined virtual paths providing context information, reducing distance between digital real...

In this paper we propose LoRaSyNc (LoRa receiver with SyNchronization and Cancellation), a second generation LoRa that implements Successive Interference Cancellation (SIC) time synchronization to improve the performance of gateways.Indeed, chirp spread spectrum modulation employed in experiences very high capture probability, cancelling strongest signal case collisions can significantly cell capacity.An important feature is ability track frequency clock drifts between transmitter receiver,...

We introduce MAClets, software programs uploaded and executed on-demand over wireless cards, devised to change the card's real-time medium access control operation. MAClets permit seamless reconfiguration of MAC stack, so as adapt it mutated context spectrum conditions perform tailored performance optimizations hardly accountable by an once-for-all protocol stack design. Following traditional active networking principles, can be directly conveyed within data packets on hard-coded devices...

In this paper, we present Overgrid, a fully distributed peer-to-peer (P2P) architecture designed to automatically control and implement demand response (DR) schemes in community of smart buildings with energy generation storage capabilities. As overlay networks communications establish logical links between peers regardless the physical topology network, Overgrid is able apply some power balance criteria its system buildings, as they belong virtual microgrid, their location. We exploit an...

This work analyzes human behavior recognition approaches using WiFi channel state information from the perhaps less usual point of view training and calibration needs. With help selected literature examples, as well with more detailed experimental insights on our own Doppler spectrum-based approach for physical motion/presence/cardinality detection, we first classify diverse forms so far employed into three main categories (trained, trained-once, training-free). We further discuss under...

By 2030, it is expected that a trillion things will be connected. In such scenario, the power required for nodes would necessitate using trillions of batteries, resulting in maintenance challenges and significant management costs. The objective this research to contribute sustainable wireless sensor through introduction an energy-autonomous node (EAWSN) designed energy-autonomous, self-sufficient, maintenance-free device, suitable long-term mass-scale internet (IoT) applications remote...

Today bike sharing systems are becoming popular in many cities as short-distance transit vehicles. More than 18 million bicycles available worldwide for public use and one of the main problems that afflicts such is loss bikes, which can be stolen or simply left unknown locations. Thus, bikes docked tracked using GPS costly cellular connections. In this paper, we consider emerging Long Range (LoRa) technology systems. LoRa exploits free ISM bands has been conceived low power data rate...

According to IoT Analytics, NB-IoT, LoRaWAN, and Sigfox are today the most popular technologies for low-power wide-area networks (86% of market), both in terms end-user adoption as well ecosystem support. While NB-IoT utilizes licensed bands, LoRaWAN employ sub-GHz ISM potentially interfering with each other.In this paper, we present a thorough coexistence study between Sigfox, realistic urban scenarios, different duty cycles traffic conditions. The choice such scenarios simulation...

In this work we show how to detect ZigBee interference on commodity WiFi cards by monitoring the reception errors, such as synchronization invalid header formats, too long frames, etc., caused transmissions. Indeed, in presence of non-WiFi modulated signals, occurrence these types errors follows statistics that can be easily recognized. Moreover, duration error bursts depends transmission interval source, while spacing receiver implementation. On basis considerations, propose adoption hidden...

Ambient energy-powered sensors are becoming increasingly crucial for the sustainability of Internet-of-Things (IoT). In particular, batteryless a cost-effective solution that require no battery maintenance, last longer and have greater weatherproofing properties due to lack access panel. this work, we study adaptive transmission algorithms improve performance IoT based on LoRa protocol. First, characterize device power consumption during sensor measurement and/or events. Then, consider...

In this letter, we show how cross-technology interference can be exploited to set up a low-rate bidirectional communication channel between heterogeneous WiFi and ZigBee networks. Because of the environment noise receivers' implementation, severely affected by insertions deletions symbols, whose effects need taken into account coding scheme protocol.

The need for massive content delivery is a consolidated trend in mobile communications, and will even increase next years. Moreover, while 4G maturity evolution driven by video contents, generation (5G) networks be dominated heterogeneous data additional diffusion of Internet Things (IoT). current network architecture not sufficient to cope with such traffic, which terms latency QoS requirements, variable space time. This paper proposes architectural advances endow the necessary flexibility...

5G networks will have to offer extremely high volumes of content, compared those today's. Moreover, they support heterogeneous traffics, including machine-to-machine, generated by a massive volume Internet-of-Things devices. Traffic demands be variable in time and space. In this work, we argue that all can achieved cost-effective way if the network is flexible reconfigurable. We present Flex5Gware architecture, designed meet above requirements. discuss links between flexibility...

In this paper, we show that inter-technology interference can be recognized using commodity WiFi devices by monitoring the statistics of receiver errors. Indeed, while for standard frames error probability varies during frame reception in different fields (PHY, MAC headers, and payloads) protected with heterogeneous coding, errors may appear randomly at any point time demodulator is trying to receive an exogenous interfering signal. We thus detect identify cross-technology on off-the-shelf...

In this paper we show how inter-technology interference can be exploited to set-up a low-rate bi-directional communication channel between heterogeneous technologies, which coexist in ISM bands. particular, focus on WiFi and ZigBee networks, whose high density deployments make coexistence critical issue. We monitor the transmission duration of and, after recognizing from off-the-shelf receivers, precisely measure busy intervals map time symbols. A similar approach is used receivers for...