In a conventional wireless cellular system, signal processing is performed on per-cell basis; out-of-cell interference treated as background noise. This paper considers the benefit of coordinating base-stations across multiple cells in multi-antenna beamforming where may jointly optimize their respective beamformers to improve overall system performance. Consider multicell downlink scenario are equipped with transmit antennas employing either linear or nonlinear dirty-paper coding, and...

Given the increasing number of space-related applications, research in emerging space industry is becoming more and attractive. One compelling area current design miniaturized satellites, known as CubeSats, which are enticing because their numerous applications low design-and-deployment cost. The new paradigm connected through CubeSats makes possible a wide range such Earth remote sensing, exploration, rural connectivity. further provide complementary connectivity solution to pervasive...

This paper surveys the optimization frameworks and performance analysis methods for large intelligent surfaces (LIS), which have been emerging as strong candidates to support sixth-generation wireless physical platforms (6G). Due their ability adjust behavior of interacting electromagnetic (EM) waves through manipulations reflections phase shifts, LIS shown promising merits at improving spectral efficiency networks. In this context, researchers recently exploring technology in depth a means...

Terahertz (THz)-band communications are currently being celebrated as a key technology that could fulfill the increasing demands for wireless data traffic in 6G communications. Many challenges, such high propagation losses and power limitations, which result short communication distances, have yet to be addressed this realized. Ultramassive multiple-input, multiple-output (UMMIMO) antenna systems emerged practical means combatting distance problem, thereby system capacity. Toward end,...

The rapid pace of demand for mobile data services and the limited supply capacity in current wireless access networks infrastructure are leading network operators to increase density base station deployments improve performance. This densification, made possible by small-cell deployment, also brings a novel set challenges, specifically related cost ownership, which backhaul is primary concern. article proposes cost-effective hybrid RF/free-space optical (FSO) solution combine advantages RF...

The deluge of date rate in today's networks imposes a cost burden on the backhaul network design. Developing cost-efficient solutions becomes an exciting, yet challenging, problem. Traditional technologies for networks, including either radio-frequency (RF) backhauls or optical fibers (OF). While RF is cost-effective solution as compared with OF, it supports lower data requirements. Another promising free-space optics (FSO) offers both high and relatively low cost. FSO, however, sensitive to...

This paper surveys the literature on point-to-point (P2P) links for integrated satellite-aerial networks, which are envisioned to be among key enablers of sixth-generation (6G) wireless networks vision. The first outlines unique characteristics such large-scale complex often denoted by spatial and focuses two particular space-air infrastructures, namely, satellites high-altitude platforms (HAPs). then classifies connecting P2P communications as satellite-to-satellite at same layer (SSLL),...

In a conventional wireless cellular system, signal processing is performed on per-cell basis; out-of-cell interference treated as background noise. This paper considers the benefit of coordinating base-stations across multiple cells in multi-antenna beamforming where may jointly optimize their respective beamformers to improve overall system performance. focuses downlink scenario each remote user equipped with single antenna, but users be active simultaneously cell. The design criterion...

Despite the promising high-data rate features of visible light communications (VLC), they still suffer from unbalanced services due to blockages and channel fluctuation among users. This paper introduces evaluates a new transmission scheme which adopts cooperative non-orthogonal multiple access (Co-NOMA) in hybrid VLC/radio-frequency (RF) systems, so as improve both system sum-rate fairness. Consider network consisting one VLC point (AP) strong weak users, where each user is paired with...

Cloud-radio access networks (C-RAN) help in overcoming the scarcity of radio resources by enabling dense deployment base-stations (BSs) and connecting them to a central-processor (CP). This paper considers downlink C-RAN, where cloud is connected BSs via limited-capacity backhaul links. We propose optimize C-RAN transmission scheme that combines rate splitting, common message decoding, beamforming vectors design clustering. To this end, optimizes splitting (RS), decoding (CMD), clustering...

Despite the growing interest in interplay of machine learning and optimization, existing contributions remain scattered across research board, a comprehensive overview on such reciprocity still lacks at this stage. In context, paper visits one particular direction between learning-driven solutions further explicates subject matter with clear background summarized theory. For instance, its offsprings are trending because their enhanced capabilities automating analytical modeling. realm,...

This paper addresses the joint coordinated scheduling and power control problem in cloud-enabled networks. Consider downlink of a cloud-radio access network (CRAN), where cloud is only responsible for policy, control, synchronization transmit frames across single-antenna base-stations (BS). The frame consists several time/frequency blocks, called power-zones (PZs). considers users to PZs determining their levels (PLs), by maximizing weighted sum-rate under practical constraints that each...

Delivering an immersive experience to virtual reality (VR) users through wireless connectivity offers the freedom engage from anywhere at any time. Nevertheless, it is challenging ensure seamless that delivers real-time and high-quality videos VR users. This paper proposes a field of view (FoV) aware caching for mobile edge computing (MEC)-enabled network. In particular, FoV each user cached/prefetched base stations (BSs) based on strategies tailored BS. Specifically, decentralized...

Conventional wireless cellular systems treat out-of-cell interference as noise. This paper proposes methods and examines the benefit of designing decodable signals, whereby a transmitter may split its message into common private part, be decoded subtracted by users in adjacent cells. considers downlink scenario, where base-stations are equipped with multiple antennas, mobile single antenna, active simultaneously via spatial multiplexing. The network optimization problem consists jointly...

Service providers are considering the use of unmanned aerial vehicles (UAVs) to enhance wireless connectivity cellular networks. To provide connectivity, UAVs have be backhauled through terrestrial base stations (BSs) core network. In particular, we consider millimeter-wave (mmWave) backhauling in downlink a hybrid aerial-terrestrial network, where backhaul links subject beamforming misalignment errors. proposed model, user equipment (UE) can connect either ground BS or UAV, differentiate...

Integration of renewable energy systems emerges as a key enabler for future low-carbon electricity supply. To maintain secure and effective supply, the design operation these must carefully account influence weather variability on availability resources demand. This study examines impact optimal office buildings in Saudi Arabia. The building demand is supplied by photovoltaic/wind/battery storage system, with an additional connection to grid. optimization process then aims at finding...

Visible light communications (VLC) have emerged as a strong candidate for meeting the escalating demand high data rates. In this paper, we consider VLC network, where multiple access points (APs) serve both energy-harvesting users (EHUs), i.e., who harvest energy from emitted by diodes and information (IUs), gather information. order to jointly balance achievable sum rate at IUs harvested EHUs, paper considers maximizing network-wide utility, which consists of weighted EHUs energy, subject...

This paper analyzes the integration of Non-Orthogonal Multiple Access (NOMA) in a Fog Radio Network (FRAN) architecture with limited fronthaul capacity. More precisely, it proposes methods for optimizing resource allocation downlink NOMA-based FRAN multiple blocks (RB). The problem is formulated as mixed-integer optimization problem, which determines user-to-RB assignment, power allocated to each RB, and split levels NOMA users served by RB. maximizes network-wide rate-based utility function...

This letter proposes and optimizes a cooperative non-orthogonal multiple-access (Co-NOMA) scheme in the context of multicell visible light communications (VLC) networks to mitigate inter-cell interference. Consider network where each access-point (AP) serves two users. In cell, weak user (cell-edge user) can be served either directly by VLC AP, or through strong that decodes message forwards it radio-frequency (RF) link. The paper then considers problem maximizing sum-rate under...

Augmenting ground-level communications with flying networks, such as the high-altitude platform system (HAPS), is among major innovative initiatives of next generation wireless systems (6G). Given HAPS quasi-static positioning at stratosphere, HAPS-to-ground and HAPS-to-air connectivity frameworks are expected to be prolific in terms data acquisition computing, especially given mild weather quasi-constant wind speed characteristics stratospheric layer. This paper explores opportunities...

This paper proposes, and evaluates the benefits of, a hybrid central cloud (CC) mobile edge computing (MEC) platform, especially introduced to balance network resources for joint communication computation. The transmission is further empowered by splitting users' messages into private common parts, mitigate interference within CC MEC platforms. While several power-hungry, computationally-limited unmanned aerial vehicles (UAVs) are deployed at cell-edge boost connectivity relieve part of its...

This article proposes, and evaluates the benefit of, one particular hybrid satellite-high-altitude-platform-station (HAPS)-ground network, where HAPS connected to geo-satellite assists ground base stations (BSs) at serving ground-level users. The paper assumes that is using free-space-optical backhaul links. HAPS, equipped with multiple antennas, aims transmitting data users via radio-frequency (RF) links spatial-multiplexing. Each BS, on other hand, but directly serves through RF then...

Underwater engineering significantly increases the liveability and sustainability of our planet's ecosystems. Enhancing connectivity ocean-based systems ensuring its digital resilience is, therefore, indispensable for reaping benefits underwater systems. To this end, work proposes augmenting with cloud platforms as a paradigm shift upscaling communication networks applications. The envisioned cloud-assisted network (UCAN) provides joint computing, processing, communication, acquisition while...