In this paper, a survey of the literature past 15 years involving machine learning (ML) algorithms applied to self-organizing cellular networks is performed. order for future overcome current limitations and address issues systems, it clear that more intelligence needs be deployed so fully autonomous flexible network can enabled. This paper focuses on perspective (SON) solutions provides, not only an overview most common ML techniques encountered in but also manages classify each terms its...

We analyze the physical layer (PHY) security of a communication scheme consisting multiple antenna transmitter with single radio frequency (RF) chain using transmit selection (TAS) and receiver, in presence sophisticated eavesdropper. develop closed-form expressions for analysis secrecy outage probability, we show that PHY can be considerably enhanced when antennas are available at legitimate transmitter. Moreover, RF reduces cost, complexity, size power consumption expense slight loss...

Recent advances on wireless energy transfer (WET) make it a promising solution for powering future Internet-of-Things (IoT) devices enabled by the upcoming sixth-generation (6G) era. The main architectures, challenges and techniques efficient scalable are overviewed in this article. Candidates enablers, such as beamforming (EB), distributed antenna systems (DASs), devices' hardware programmable medium, new spectrum opportunities, resource scheduling, ledger technology outlined. Special...

Due to the unpredictability of natural disasters, whenever a catastrophe happens, it is vital that not only emergency rescue teams are prepared, but also there functional communication network infrastructure. Hence, in order prevent additional losses human lives, crucial operators able deploy an infrastructure as fast possible. In this sense, deployment intelligent, mobile, and adaptable network, through usage drones-unmanned aerial vehicles-is being considered one possible alternative for...

Low power wide area network (LPWAN) technologies are increasingly catching the attention of Internet-of-Things market and have brought need for reliable knowledge about performance such networks. This paper is concerned with scalability LoRa networks, a leading LPWAN technology. Several recently published articles analyzed ability networks to scale, i.e., their support increased traffic number nodes. proposes employ message replication gateways multiple receive antennas achieve,...

We compare the energy efficiency of some transmission schemes in wireless sensor networks. By constraining system to end-to-end throughput requirements, we assume that nodes multi-hop and cooperative operate at a spectral which is twice single-hop transmission. taking into account consumption RF circuitry, show cooperation may be considerably more efficient than non-cooperative even small ranges, specially if feedback channel available.

We analyze and optimize a wireless system with energy transfer in the downlink information uplink, under quasi-static Nakagami-m fading. consider ultrareliable communication scenarios representative of fifth generation systems, strict error latency requirements. The probability delay are investigated, an approximation for former is given validated through simulations. numerical results demonstrate that there optimum numbers channels uses both message length.

We analyze a cooperative wireless communication system with finite block length and battery energy, under quasi-static Rayleigh fading. Source relay nodes are powered by energy transfer process, while using the harvested to feed their circuits, send pilot signals estimate channels at receivers, for information transmission. Other power consumption sources beyond data transmission considered. The error probability is investigated perfect/imperfect channel state information, reaching accurate...

Machine Type Communications (MTC) is a main use case of 5G and beyond wireless networks. Moreover, due to the ultra-dense nature massive MTC networks, Random Access (RA) optimization very challenging. A promising solution machine learning methods, such as reinforcement learning, efficiently accommodate devices in RA slots. In this sense, we propose distributed method based on Non-Orthogonal Multiple (NOMA) Q -Learning dynamically allocate slots devices. Numerical results show that proposed...

Radio frequency wireless energy transfer (WET) is a promising solution for powering autonomous Internet of Things (IoT) deployments. In this work, we leverage beamforming multiple user equipments (UEs) with stringent harvesting (EH) demands in an indoor distributed massive multiple-input multiple-output system. Based on semi-definite programming, successive convex approximation (SCA), and maximum ratio transmission (MRT) techniques, derive optimal sub-optimal precoders aimed at minimizing...

This work considers the problem of radio resource sharing between enhanced mobile broadband (eMBB) and ultra-reliable low latency communications (URLLC), two heterogeneous 5G services. More specifically, we propose use a max-matching diversity (MMD) algorithm to properly allocate channels eMBB users, considering both orthogonal multiple access (H-OMA) non-orthogonal (H-NOMA) network slicing strategies. Our results indicate that MMD can simultaneously improve achievable rate URLLC reliability...

Wireless energy transfer (WET) is emerging as a potential solution for powering small energy-efficient devices. We propose strategies that use multiple antennas at power station, which wirelessly charges large set of single-antenna The proposed operate without channel state information (CSI), and we attain the distribution main statistics harvested under Rician fading channels with sensitivity saturation energy-harvesting (EH) impairments. A switching antenna strategy, where single full...

Low Power Wide Area Networks (LPWAN) are wireless connectivity solutions for Internet-of-Things (IoT) applications, including industrial automation. Among the several LPWAN technologies, LoRaWAN has been extensively addressed by research community and industry. However, reliability scalability of still uncertain. One techniques to increase is message replication, which exploits time diversity. This paper proposes a novel hybrid coded replication scheme that interleaves simple repetition...

The recent extra-large scale massive multiple-input multiple-output (XL-MIMO) systems are seen as a promising technology for providing very high data rates in user-density scenarios. Spatial non-stationarities and visibility regions (VRs) appear across the XL-MIMO array, since its large dimension is of same order distances to user-equipments (UEs). Due increased density UEs typical applications scarcity pilots, design random access (RA) protocols scheduling algorithms become challenging. In...

Orthogonal Frequency Division Multiplexing (OFDM) is the modulation technology used in Fourth Generation (4G) and Fifth (5G) wireless communication systems, it will likely be essential to Sixth (6G) systems. However, OFDM introduces a high Peak Average Power Ratio (PAPR) time domain due constructive interference among multiple subcarriers, increasing complexity cost of amplifiers and, consequently, 6G networks. Therefore, development new solutions reduce PAPR systems crucial The application...

The exponential growth of Internet Things (IoT) applications led to the deployment IoT devices in remote areas beyond reach terrestrial networks, calling for satellite network solutions. Indeed, Low-Earth Orbit (LEO) satellites can provide global connectivity direct-to-satellite (DtS)-IoT applications, with remarkable impact several areas, as environmental monitoring, precision agriculture, and disaster prevention. One key challenges DtS-IoT is supporting energy spectral efficient multiple...

Wireless Energy Transfer (WET) combined with Simultaneously Transmitting and Reflecting Reconfigurable Intelligent Surface (STAR-RIS) technology offers a promising approach to optimize the recharging of Internet Things (IoT) devices. In this work, we propose use STAR-RIS in WET context enable efficient IoT devices, goal minimizing total system time while ensuring that each device meets its minimum energy requirement. The optimization is performed using Particle Swarm Optimization (PSO)...