Wireless energy harvesting is an efficient way to prolong the lifetime of constrained networks. In this paper, a two-way amplify-and-forward (AF) based relay network considered, where two communicating nodes concurrently transmit there information signals node using time switching relaying protocol (TSR). The and therefore it first harvests from received radio frequency (RF) signals. After successful utilizes harvested amplify forward signal its destination. We derive analytical expression...

Accommodating an increasing number of machine‐to‐machine (M2M) devices is one the main issues faced by cellular networks. In a typical M2M setup, several may try to connect network simultaneously. Long‐term evolution advanced (LTE‐A) networks use random access procedure for this purpose, which not sufficient cater large devices. The conventional extended allowing with reduced collisions. Mathematical analysis and simulation results show that proposed scheme increases probability as well...

Relaying is a widely proposed solution for multi-hop communication in PS environments. However, the selected relay energy constrained and cannot go on indefinitely. Energy harvesting can solve this problem make D2D viable services. In paper, selection of has been studied device-to-device (D2D) communications. Public safety environment considered, where some user equipments (UE) are located out coverage area eNodeB (eNB). For UEs, with eNB possible through an intermediate UE those UEs main...

This paper proposes a full duplex relay scheme for ambient backscatter devices which require little or no power operation. The reflect radio signals from sources such as TV tower, FM station, etc. Because of the backscattering signals, have small coverage range. To extend network devices, relaying is most conventional way, previously used extending range networks LTE, WiFi and so on. In this paper, assist other to information their destination nodes. characteristics at node, they can send...

Introduction of Device-to-Device (D2D) communication in public safety (PS) environments has been well investigated by 3rd Generation Partnership Project (3GPP). The main target is to provide services user equipments (UE) the disaster struck area with help ordinary UEs over D2D links. UE-relaying one most important application especially PS environment. While selecting this type relay, several factors have be considered prior selection process. Previously, only transmission rates were for UE...

Abstract In order to enable effective public safety services in challenged environments, 3rd Generation Partnership Program is considering the use of device‐to‐device (D2D) communications. D2D communications can be ideal various emergency situations where conventional network get suspended. We propose a D2D‐based user equipment (UE) relaying process support out‐of‐range isolated UEs. The main idea allow UEs that have active connections with eNB exchange data over direct links. This paper...

Self-compacting concrete (SCC) is a type of that does not require vibration and undergoes compaction under its own self-weight. Cement being the major constituent self-compacting very expensive. Thereby incorporating fly ash, by-product obtained by burning coal in power plants, percentage cement can be reduced. Thus this study, class C ash varying percentages from 0 to 30% has been used as partial replacement cement. The main purpose study effects on mechanical behavior durability properties...

Ambient backscatter is a promising wireless communication technique where low-power users communicate with each other without any dedicated power source. These communicating transmit their information by reflecting ambient radio-frequency (RF) signals. In this paper, we propose an communications-assisted wireless-powered underlay cognitive radio network (CRN). The proposed CRN consists of single primary transmitter (PT) and multiple receivers (PRs), secondary transmitters (STs), (SRs). For...

This paper studies the performance of an intelligent reflecting surface (IRS)-assisted radio frequency (RF)-powered wireless network. In considered network, a multi-antenna base station (BS) communicates with its users (UEs) through downlink transmission and energy-constrained internet-of-things (IoT) devices, which are randomly deployed around cluster head (CH), utilize resources BS for energy harvesting information transmission. IRS, CH, reflects RF signals transmitted by to IoT providing...

In this paper, we propose a simple method to optimize the duty-cycle of an IoT network equipped with energy harvesters. The main objective is achieve Energy Neutral Operation (ENO) so that devices can operate autonomously for longer periods. We use exponentially weighted moving-average (EWMA) filter predict harvested in single duty-cycle, and adjust according required during active As case study, consider carrier sensing medium access (CSMA) Medium Access Control (MAC) protocol data...

This paper proposes the technique which can improve data rate of secondary system in radio frequency (RF) powered backscatter cognitive networks (CRNs). In previous studies, cannot transmit by conventional transmission when a channel is busy. However, our proposed scheme, transmitter (ST) allowed to even though The ST selects harvest-then-transmit or mode based on interference at primary receiver (PR). We obtain maximum optimizing allocated time energy harvesting, transmitting and...

RF energy harvesting is a novel technology which used for from the ambient resources. In harvesting, harvested converted into useful electrical to recharge battery of electronic devices. With scheme, there no need replace battery, and device can be recharged without cable line. Although technique brings convenience recharging devices, amount too small operate supplying wired resource. this paper, we consider Wi-Fi signals as resource, where nodes harvest that are being transmitted by other...

Radio frequency (RF) energy harvesting is a promising solution to increase the lifetime of energy-constrained wireless sensor networks. In this paper, we studied performance simultaneous information and power transfer (SWIPT) based multi-antenna decode forward relay network where destination can have multiple antennas. Energy constraint relay, first harvest from source signal uses harvested destination, employing time switching (TS) receiver architecture. Deploying antennas on investigated...