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Inter-cell Interference can be seen as a huge challenge towards meeting the high capacity and coverage targets, as envisioned in 5G era. To this end, factors like the expected high density of access nodes reusing the same spectrum, the diverse sources of interference from heterogeneous access technologies, flexible wireless backhauling and the consideration of multiple 5G services with different KPIs...
As a profound and evident future trend in the field of mobile communication technologies development, heterogeneous networks became one of the crucial points of interests in wireless networks industry and academic research societies. Considering heterogeneous networks as an inseparable concept from LTE networks nowadays, which remain at position of advanced cellular system, the researchers aim to...
Some Energy Efficiency Programs (EEP) considers Energy Use Intensity (EUI) as an unreliable indicator due to its variation, i.e. the EUI values are dropping when production increases. Currently used Energy Conservation Measures — ECMs (supported by governmental and utility programs) are proven by energy savings (ES) recorded at revenue meter (or system boundary meter) considering energy use or energy...
This paper proposes QoS-constrained energy-efficiency (EE) maximization scheme in a multi-antenna wireless powered network. Specifically, considering full CSI at the users, we optimize energy transmit covariance at the power transmitter, the power allocation at the users and the time allocation for energy and information transfer. The EE optimization problem is first converted into its equivalent...
In current LTE deployments, the unsupervised and unilateral installation of home or localized base stations, so called eNodeBs, may easily lead to excessive energy consumption and over-provisioning of network infrastructure. In this paper, we propose an energy efficient framework, which dynamically adjusts the power requirements of the system and performs Resource Block (RBs) allocation based on needs...
This work motivates and details the concept of QoE-aware sustainable throughput in the area of video streaming. Sustainable throughput serves as a mean to compare video streaming solutions in terms of Quality of Experience (QoE) and energy efficiency (EE). It builds upon the QoE Provisioning-Delivery Hysteresis (PDH) and denotes the maximal throughput at which QoE deteriorations can be kept below...
In this paper, a high-flexibility and energy-efficient reconfigurable symmetric cryptographic processor architecture is presented, which is based on very-long instruction word (VLIW) structure. By analyzing basic operations and storage characteristics of symmetric ciphers, the application-specific instruction-set system for symmetric ciphers is proposed. Eleven kinds of reconfigurable cryptographic...
Recent advancement in wireless communications and electronics has enabled the development of low-cost sensor networks. The sensor networks can be used for various application areas (e.g., health, military, home). Wireless sensor networks consist of small nodes with sensing, computation, and wireless communications capabilities. Many routing, power management, and data dissemination protocols have...
Data gathering in an energy efficient and timely manner is the fundamental task of Wireless Sensor Network (WSN). The battery operated sensor nodes are of limited energy and it is necessary to preserve their battery power to elongate the lifetime of WSN. In Hierarchical Routing Protocol (HRP) some nodes transmit data to BS which is more energy intensive task while others are engaged in local communications...
The continuous demands on increased spectral efficiency, higher throughput, lower latency and lower energy in communication systems imposes large challenges on appropriate channel coding schemes and their efficient hardware implementation. Consequently, channel coding is not only a matter of information theory but also more and more knowledge on efficient parallel hardware architectures and underlying...
In this paper, we propose two novel physical layer aware adaptive network coding schemes for time variant channels, one aiming to maximize the energy efficiency, the other exploiting also the variable modulation order, in an adaptive way. The proposed schemes have been applied to different satellite communications scenarios with different Round Trip Times (RTT). Compared to adaptive network coding,...
This paper analyzes the outage probability, energy efficiency, energy efficiency-spectral efficiency trade-off, through-put performance, energy efficiency-throughput gain trade-off and derives the optimal transmission power of Single-hop, Multi-hop, Decode-and-Forward (DF) and Incremental Decode-and-Forward (IDF) schemes in order to find out what extent collaborative communication can save energy...
In this paper, we investigate a user-centric Coordinated Multiple Point (CoMP) transmission scheme to improve Energy Efficiency (EE) in dense Heterogeneous Network (HetNet), which takes advantage of both Dynamic Point Reduced Power (DPRP) and Joint Transmission (JT). DPRP with a user voting method rather than Dynamic Point Blanking (DPB) is introduced to fully use the power while reducing energy consumption...
Energy Efficiency in wireless communication is very important due to the slow progress in battery technology with improvement in technology. In this paper, we applied energy efficient link adaptation using Machine learning techniques in Orthogonal Frequency Division Multiplexing (OFDM). We sounding the channel condition periodically and observing the channel parameters. Our aim is to select the optimal...
In this paper, an energy efficient, interference and route aware (EEIRA) protocol is proposed for underwater wireless sensor networks (UWSNs). The protocol combines the direct and relay forwarding mechanisms in transmitting the packets from source to destination. The relaying process involves selection of the best relay from a set of relay nodes. A relay node having the least distance from source...
Various types of small cell base stations (SBSs) are deployed randomly in heterogeneous small cell network to meet the soaring growth in traffic, which leads to more and more complex network topological structure and resource management. In this paper, we analyze the coverage performance and energy efficiency of a two tier heterogeneous network which is composed of micro tier and pico tier. With the...
This paper addresses an energy efficient network topology management strategy which exploits the path diversity in a dual-hop backhaul network in order to lessen the power consumption by switching as many underutilized base stations as possible to a dormant mode. This scheme dynamically tunes the various states of the relay nodes and aggregation points in a dual-hop setup to meet a trade-off between...
The emerging traffic demand has triggered an impressive deployment of network infrastructure, including macro Base Stations (BSs) and Small Cells (SCs), leading to increased energy consumption and expenditures. However, the network underutilization during low traffic periods (e.g., night zone) enables the Mobile Network Operators (MNOs) to save energy by having their traffic served by third-party...
Spectrum scarcity together with high capacity demands make the use of millimeter wave (mmWave) frequencies an interesting alternative for next generation, i.e., fifth generation (5G), networks. Although mmWave is expected to play a key role for both access network and backhaul (BH), its initial use in the BH network seems more straight-forward. This stems from the fact that, in the BH case, its deployment...
The advancements in emerging interconnects for Networks-on-Chip (NoCs) brings with it promising solutions to integrate single-hop long-range high-bandwidth on-chip links to achieve enhanced network performance. The use of these lie in the design of modern heterogeneous systems with increasing number of processing blocks, which may include application specific unconventional topologies. In this work,...
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