The incorporation of cognitive radio (CR) and energy harvesting (EH) capabilities in wireless sensor networks enables spectrum energy-efficient heterogeneous CR (HCRSNs). new networking paradigm HCRSNs consists EH-enabled sensors battery-powered data sensors. Spectrum can cooperatively scan the licensed for available channels, whereas monitor an area interest transmit sensed to sink over those channels. In this paper, we propose a resource-allocation solution HCRSN achieve sustainability...

In this paper, we study resource management and allocation for energy harvesting cognitive radio sensor networks (EHCRSNs). these networks, supplies the network with a continual source of to facilitate self-sustainability power-limited sensors. Furthermore, enables access underutilized licensed spectrum mitigate spectrum-scarcity problem in unlicensed band. We develop an aggregate utility optimization framework design online management, algorithm based on Lyapunov optimization. The captures...

Utilizing the intelligence at network edge, edge computing paradigm emerges to provide time-sensitive services for Internet of Things. In this paper, we investigate sustainable computation offloading in an edge-computing system that consists energy harvesting-enabled mobile devices (MDs) and a dispatcher. The dispatcher collects tasks generated by IoT with limited power, offloads them resourceful MDs exchange rewards. We propose online Rewards-optimal Auction (RoA) optimize long-term...

In this paper, we focus on the resources allocation for OFDMA based two-hop relay network which consists of a single base station, dedicated fixed stations and subscriber stations. Subscriber are allocated subcarriers that required to satisfy their minimum rate requirements in either non-cooperative mode (i.e., direct communication with station) or cooperative one available The cooperation is limited station reduce complexity incurred by need synchronization multiple relays at PHY layer....

<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> This paper presents a novel scheme for the allocation of subcarriers, rates, and power in orthogonal frequency-division multiple-access (OFDMA) networks. The addresses practical implementation issues resource OFDMA networks: inaccuracy channel-state information (CSI) available to unit (RAU) diversity subscribers' quality-of-service (QoS) requirements. In addition embedding effect CSI imperfection...

An acoustic vector-sensor (a.k.a. vector-hydrophone) is composed of three velocity-sensors, plus a collocated pressure-sensor, all in space. The velocity-sensors are identical, but orthogonally oriented, each measuring different Cartesian component the three-dimensional particle-velocity field. This offers an azimuth-elevation response that invariant with respect to source's center frequency or bandwidth. adopted here for recursive least-squares (RLS) adaptation, track single mobile source,...

Due to the limited battery power of sensor nodes and harsh deployment environment, it is fundamental importance a great challenge achieve high energy efficiency strong robustness in large-scale wireless networks (LS-WSNs). To this end, we propose two self-organizing schemes for LS-WSNs. The first scheme energy-aware common neighbor scheme, which considers neighborhood overlap link establishment. second low potential-degree (ELDCN) both topology formation potential degrees neighbors. Both...

<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> A comprehensive and integrative overview (excluding ultrawideband measurements) is given of all the empirical data available from open literature on various temporal properties indoor radiowave communication channel. The concerned frequency range spans over 0.8–8 GHz. Originally, these were presented in about 70 papers journals, at diverse conferences, different books. Herein overviewed are...

Fair weights have been implemented to maintain fairness in recent resource allocation schemes. However, designing fair for multiservice wireless networks is not trivial because users' rate requirements are heterogeneous and their channel gains variable. In this paper, we design opportunistic scheduling of traffic orthogonal frequency division multiple access (OFDMA) networks. The determine each user's share maintaining a utility notion fairness. We then present scheme which enforces long...

In this paper, the problem of joint subcarrier assignment and global energy-efficient power allocation (J-SA-GEE-PA) for energy-harvesting (EH) two-tier downlink non-orthogonal multiple-access (NOMA) heterogeneous networks (HetNets) is considered. Particularly, HetNet consists a macro base-station (MBS) number small base-stations (SBSs), which are solely powered via renewable-energy sources. The aim to solve J-SA-GEE-PA maximization subject quality-of-service (QoS) per user as well other...

Summary Software‐defined networking is a promising paradigm for achieving programmability and centralized control in communication networks. These features simplify network management enable innovation applications services such as routing, virtual machine migration, load balancing, security, access control, traffic engineering. The routing application can be optimized power efficiency by flows coalescing them that the least number of links activated with lowest link rates. However,...

In this article, we consider a scenario of decode-and-forward (DaF) wireless system supporting the communication an unmanned aerial vehicle (UAV) with ground-control-station (GCS) through intelligent reflecting surface (IRS). Particularly, UAV moves according to three-dimensional (3D) random way point model at low altitude in complex urban environment. However, stationary relay-station (RS) decodes and forwards UAV’s signal over IRS-aided virtual line-of-sight (LoS) link GCS. The highly...

Traffic offloading through heterogenous small-cell networks (HSCNs) has been envisioned as a cost-efficient approach to accommodate the tremendous traffic growth in cellular networks. In this paper, we investigate an energy-efficient dual-connectivity (DC) enabled HSCNs, which small cells are powered hybrid manner including both conventional on-grid power-supply and renewable energy harvested from environment. To achieve flexible offloading, emerging DC-enabled 3GPP specification allows each...

Power consumption and CO2 emission have become a major concern over the last few years. Several recent studies shown that servers network equipments consume up to 45% of energy data centers [1]. Software-defined networking is new paradigm decouples control functionalities; thus, makes networks easily manageable programmable. In software-defined (SDNs), central controller has global view topology, traffic matrices QoS requirements, which allows it optimize through energy-aware routing. this...

In this paper, we present three network evolution models for generating fault-tolerant and energy- efficient large-scale peer-to-peer wireless sensor networks (WSNs) based on complex theory. Being scale-free is one of the intrinsic features networks-based that generates fault- tolerant topologies. work, argue topologies are not necessarily energy efficient. The proposed energy-aware common neighbors (ECN), aware large degree promoted (ELDP) demoted (ELDD). ECN considers neighborhood overlap,...

We consider the problem of minimizing routing power consumption in software-defined networks. The network is composed networking (SDN) nodes and a central controller where decisions are centralized. More specifically, minimizes by flows on minimum number active links with lowest discrete link rates. Thus, it maximizes inactive level rates, which reflects significant saving consumption. This mixed-integer programming known to be NP-hard. Therefore, we propose low-complexity greedy heuristic...

This paper addresses practical implementation issues of resource allocation in OFDM A networks: inaccuracy channel state information (CSI) available to the unit (RAU) and diversity subscribers' quality service (QoS) requirements. The problem considered point-to-multipoint (PMP) network is modeled as a utility maximization (NUM) that allocates subcarriers, rate power while satisfying orthogonal frequency division multiple access (OFDMA) constraints QoS defined level agreement. Performance...