Smart grid with latest technologies provides solid foundation for the implementation of energy management systems at home premises. This paper proposes an autonomous management-based cost reduction solution peak load times using a system (HEMS). Within environment, both real time and schedulable appliances are connected smart meter through HEMS. We formulate optimization problem under various practical constraints, which is shown to be mixed integer programming that can solved step-wise...

Non-orthogonal multiple access (NOMA) holds the promise to be a key enabler of 5G communication. However, existing design NOMA systems must optimized achieve maximum rate while using minimum transmit power. To do so, this paper provides novel technique based on multi-objective optimization efficiently allocate resources in multi-user supporting downlink transmission. Specifically, our unique jointly improves spectrum and energy efficiency satisfying constraints users quality services (QoS)...

Recently, non‐orthogonal multiple access (NOMA) has been considered as a promising radio technique for the upcoming fifth generation networks. In this study, authors consider downlink multi‐cell multi‐user cellular network, where base station (BS) located in centre of each cell intends to communicate with random distributed user equipments (UEs) using NOMA protocol. They formulate an optimisation problem increase sum network capacity under various practical constraints. Especially,...

In this letter, we study the problem of resource allocation in amplify-and-forward (AF) based multiuser two-way relay network that is operated under orthogonal frequency division multiple access (OFDMA) modulation. We formulate an end-to-end throughput maximization subject to limited power constraint at individual user and relay. The optimization targets find best sub-carrier each user, pairing relay, as well all nodes, which turns out be a mixed integer programming problem. then derive...

Vehicular communication is gradually evolving from the rudimentary data exchange techniques to innovative, efficient, and large-scale platform. The future vehicular networks aim offer new services achieve massive connectivity with aid of advanced wireless techniques. In this regard, one emerging paradigms non-orthogonal multiple access (NOMA) which holds promise meet resource-intensive demands networks. Due reason, applications NOMA are being investigated by researcher academia industry...

In this paper, we present a joint power allocation and adaptive link selection protocol for an orthogonal frequency division multiplexing (OFDM)-based network consists of one source node i.e., base station (BS), destination (MU) buffer aided decode forward (DF) relay node. Our objective is to maximize the average throughput system via loading over different subcarriers at nodes. A separate budget assumed each transmitting make more practical. order form our solution tractable, decomposition...

To support the massive connectivity in Internet of Things (IoT), several promising techniques like cognitive radio (CR) and non-orthogonal multiple access (NOMA) enables user to share spectrum resources. This work aims achieve fairness among secondary users (SUs) IoT cooperative NOMA-based CR transmission. We design a power allocation algorithm, an independent battery constraint at each node is considered, gap transmissions two NOMA applied for successive interference cancellation. The...

In this paper, we investigate the resource allocation problem in a single-user relay-aided cognitive radio (CR) underlay network. Both CR network and primary operate under orthogonal frequency-division multiplexing (OFDM) scheme. Different from conventional problem, relay node here is capable of performing subcarrier permutation over two hops such that signal received particular forwarded via different subcarrier. The objective to maximize throughput subject limited power budget at secondary...

The issue of spectrum scarcity in wireless networks is becoming prominent and critical with each passing year. Although several promising solutions have been proposed to provide a solution scarcity, most them many associated tradeoffs. In this context, one the emerging ideas relates utilization cognitive radios (CR) for future heterogeneous (HetNets). This paper provides marriage two candidates (i.e., CR HetNets) beyond fifth generation (5G) networks. More specifically, joint power...

The future generation of wireless communication networks demands for high spectral efficiency to accommodate a large number devices over the limited available frequency spectrum. Device device (D2D) systems exploit channel reuse offer and reduce burden on infrastructure by facilitating between without involving base station. We can further enhance D2D employing non-orthogonal multiple access (NOMA) transmission signals. In NOMA signals users are transmitted same channel, simultaneously....

Abstract Nonorthogonal multiple access (NOMA) has been recognized as a key solution to fulfill the demands of 5G wireless communication. In this paper, our aim is maximize fairness in data rates different users multiuser NOMA system. We optimize downlink transmission subject minimum rate requirement each user, limited power budget at transmitter, and successive interference cancelation constraint. First, we solve problem for two‐user scenario where nonconvex transformed into standard convex...

The energy harvesting cognitive radio networks (EH-CRNs) are expected to play a key role in satisfying the demands of next generation wireless communications. In underlay CRN, secondary base station (SBS) is prohibited transmit at high power keep interference temperature within acceptable limits. Thus, transmission user (SU) located far away from SBS may not be possible. this paper, we investigate cooperative EH-CRNs where an SU close harvests and helps relaying data distant SU. aim maximize...

In recent years, the concept of non-orthogonal multiple access (NOMA) has gathered much attention due to its potential offer high spectral efficiency, present user fairness and grant free sixth generation (6G) vehicular networks. This paper proposes a new optimization framework for NOMA-enabled cooperative network. particular, we jointly optimize vehicle paring, channel assignment, power allocation at source relaying vehicles. The objective is maximize sum rate system subject allocation,...

Abstract In this paper, we study the physical layer security problem in dual‐hop orthogonal frequency division multiplexing–based wireless communication system. First, consider a single‐user single‐relay system and joint power optimization at source relay subject to individual constraint 2 nodes. The aim is maximize end‐to‐end secrecy rate with optimal allocation over different subcarriers. Later, more general multiuser multirelay scenario. Under high signal‐to‐noise ratio approximation for...

The modern cellular technologies are expected to provide high data rates and massive connectivity in fifth generation (5G) systems; however, this may be impossible through traditional radio access techniques. Recently, non-orthogonal multiple (NOMA) has emerged as one of the promising techniques for communications with its ability users network over same system resources. This paper studies resource management problem downlink transmission multiuser NOMA system. Our objective is optimize...

The fifth generation (5G) wireless communication systems promise to provide massive connectivity over the limited available spectrum. Various new transmission paradigms such as non-orthogonal multiple access (NOMA) and cognitive radio (CR) have emerged potential 5G enabling technologies. These techniques offer high spectral efficiency by allowing users communicate on same frequency channel, simultaneously. A combination of both may further enhance performance system. This work aims maximize...

In this paper, we consider the Physical Layer Security (PLS) problem in orthogonal frequency division multiple access (OFDMA) based dual-hop system which consists of users, amplify and forward relays, an eavesdropper. The aim is to enhance PLS entire by maximizing sum secrecy rate secret users through optimal resource allocation under various practical constraints. Specifically, sub-carrier different relay assignments, power loading over sub-carriers at transmitting nodes are optimized....

The cooperative communication with simultaneous wireless information and power transfer can provide a potential solution to meet the demands of next-generation green transmission. In this paper, we consider system where each user has capability energy harvesting (EH) from radio frequency relays data other users. Our target is minimize overall consumption while satisfying quality service constraints in terms minimum required rate. time division scheme adopted for transmission relaying...

Microgrids provide promising solution for integration of renewable energy sources in the electrical grid. To exploit key benefits, achieving economical operation aided microgrids has become necessary and is a challenging task. This paper presents an efficient optimization model to minimize operational cost solar integrated microgrid. We formulate joint mixed integer problem appropriate modeling system under various practical constraints. An obtained with distributed approach such that...

In this paper, we consider the power-allocation problem in orthogonal frequency-division multiplexing (OFDM)-based bidirectional cognitive radio (CR) relay networks. A joint optimization under amplify-and-forward (AF) relaying protocol is formulated to maximize throughput of secondary users (SUs) via power loading over different subcarriers at three (two transceivers and a relay) nodes. For compatibility with practical systems, separate constraints are considered each transmitting node....

This paper presents energy efficient resource allocation schemes for multi-user cognitive radio networks. The aim is to achieve the fairness in power consumption of different secondary users. A binary integer programming problem formulated jointly allocate sub-carriers users and loading over sub-carriers. Energy achieved subject individual constraints at nodes, interference constraint primary network, minimum required rate system. Dual decomposition based approach used find a joint...

Device to device (D2D) communication has emerged as a potential candidate for next-generation networks support higher data rates and minimize power consumption. The spectral energy efficiency of D2D can further be improved using cognitive radio (CR) frequency harvesting (RF-EH) technologies. Therefore, in this paper, sum throughput maximization problem CR assisted network is modeled considering the RF-EH mechanism. A joint optimization formulated sum-rate cellular users by allocation,...