scholarly journals A New Green Prospective of Non-orthogonal Multiple Access (NOMA) for 5G

Information ◽  
2020 ◽  
Vol 11 (2) ◽  
pp. 89 ◽  
Author(s):  
Vishaka Basnayake ◽  
Dushantha Nalin K. Jayakody ◽  
Vishal Sharma ◽  
Nikhil Sharma ◽  
P. Muthuchidambaranathan ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Wireless Networks ◽  
Energy Efficient ◽  
Multiple Access ◽  
Performance Metrics ◽  
High Energy ◽  
Performance Comparison ◽  
Mobile Cellular ◽  
Access Scheme ◽  
Data Rates

Energy efficiency is a major concern in the emerging mobile cellular wireless networks since massive connectivity is to be expected with high energy requirements from the network operators. Non-orthogonal multiple access (NOMA) being the frontier multiple access scheme for 5G, there exists numerous research attempts on enhancing the energy efficiency of NOMA enabled wireless networks while maintaining its outstanding performance metrics such as high throughput, data rates and capacity maximized optimally.The concept of green NOMA is introduced in a generalized manner to identify the energy efficient NOMA schemes. These schemes will result in an optimal scenario in which the energy generated for communication is managed sustainably. Hence, the effect on the environment, economy, living beings, etc is minimized. The recent research developments are classified for a better understanding of areas which are lacking attention and needs further improvement. Also, the performance comparison of energy efficient, NOMA schemes against conventional NOMA is presented. Finally, challenges and emerging research trends, for energy efficient NOMA are discussed.

scholarly journals Multistage Energy Efficient Cooperative Routing Technique for Wireless Ad-Hoc Networks

2019 ◽  
Vol 8 (3) ◽  
pp. 5034-5038
Keyword(s):  
Energy Efficiency ◽  
Wireless Networks ◽  
Wireless Ad Hoc Networks ◽  
Energy Efficient ◽  
Ad Hoc ◽  
Performance Metrics ◽  
Energy Utilization ◽  
Energy Balancing ◽  
Cooperative Model ◽  
Cooperative Routing

In the recent years cooperative communication and routing has drawn the attention of the researchers primarily on the energy efficacy aspect in a general wireless networks. The lifetime of the network and energy utilization need to be improved in wireless communication network. The cooperative model has proved to be one of the best techniques for enhancement of network lifetime and also energy balancing among the nodes in wireless networks. In this research article proposes a novel multistage energy efficient cooperative routing technique which enhances the lifetime and energy efficiency. The multistage cooperative model is designed to find the set of neighboring nodes which cooperatively participate for transmission. Later the cost of link matrix is calculated for those set of cooperative nodes. The multistage cooperative routing mechanism is proposed based on multistage cooperative model and optimal link cost to minimize the routing cost. The simulation results of the proposed scheme shows that, it has enhanced energy efficiency and the lifetime of network for various number of performance metrics. The results obtained may be compared with the existing techniques.

scholarly journals Review of the existing energy labelling systems and a proposal for rail vehicles

2020 ◽  
pp. 095440972092636
Author(s):  
Zhendong Liu ◽  
Mats Berg ◽  
Tohmmy Bustad
Keyword(s):  
Energy Efficiency ◽  
Energy Efficient ◽  
High Energy ◽  
Rail Transport ◽  
Transport Sector ◽  
Rail Vehicles ◽  
Low Emission ◽  
Energy Labelling ◽  
Efficiency Indicators ◽  
Labelling System

Improving energy efficiency and reducing CO2 emissions are becoming very essential worldwide. To encourage the development and application of energy-efficient and low-emission technologies and to increase people's awareness of energy-saving, many energy labelling systems are developed and utilized in most countries. Since energy labelling systems have a significant impact, more and more sectors are developing their energy labelling systems to have their products included. Globally, the transport sector consumes a great proportion of energy and is responsible for considerable CO2 emissions. Although rail vehicles have relatively high energy efficiency, a labelling system has not been developed in the railway sector, whereas other modes of transport have developed energy efficiency indicators or energy labelling systems. Therefore, it is necessary to develop an energy labelling system for rail vehicles to promote rail transport and develop the technology of rail vehicles. First, this paper gives a review of the existing energy labelling systems. Second, it summarizes the rail needs and rail stakeholders’ interests regarding energy efficiency and corresponding labelling. Last but not least, a proposal for an energy labelling system for rail vehicles is given.

scholarly journals High Energy Efficient Heterogeneous Networks: Cooperative and Cognitive Techniques

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Heng Wang ◽  
Jiamo Jiang ◽  
Jian Li ◽  
Manzoor Ahmed ◽  
Mugen Peng
Keyword(s):  
Energy Efficiency ◽  
Cognitive Radio ◽  
Cooperative Communication ◽  
High Energy ◽  
Performance Comparison ◽  
System Capacity ◽  
Small Cells ◽  
Communication Techniques ◽  
High Spectral Efficiency ◽  
Efficiency Performance

Heterogeneous network (HetNet) is considered as the main and eminent future communication technology, since it achieves high spectral efficiency per unit area and saves energy due to low transmission power. Mass deployment of small cells in cochannel mode increases overall system capacity, but it is also coupled with greater risk of cochannel interference. This paper overviews the interference model based on the Poisson point process (PPP) and analyzes the performance in terms of energy efficiency in multitier HetNet. As the promising solution for improving the performance of HetNet, both the cooperative communication and cognitive radio techniques to mitigate the interference in HetNet are surveyed. As one example of cooperative communication techniques, a hierarchical cooperation scheme on the spectrum allocation is presented and its energy efficiency performance is analyzed and evaluated. Meanwhile, the energy efficiency increases from the cognitive radio technique are demonstrated as well. The energy efficiency performance comparison between the presented cooperative communication and cognitive radio techniques is emphasized, which suggests that the cooperation communication technique is preferred to suppress the interference and increase the energy efficiency in HetNets.

RE-STORM: REAL-TIME ENERGY EFFICIENT DATA ANALYSIS ADAPTING STORM PLATFORM

2016 ◽  
Vol 78 (10) ◽  
Author(s):  
Rizwan Patan ◽  
Rajasekhara Babu M.
Keyword(s):  
Energy Efficiency ◽  
Big Data ◽  
Response Time ◽  
Energy Efficient ◽  
Data Stream ◽  
High Performance ◽  
High Energy ◽  
Streaming Data ◽  
Stream Computing ◽  
High Energy Efficiency

It is necessary to model an energy efficient and stream optimization towards achieve high energy efficiency for Streaming data without degrading response time in big data stream computing. This paper proposes an Energy Efficient Traffic aware resource scheduling and Re-Streaming Stream Structure to replace a default scheduling strategy of storm is entitled as re-storm. The model described in three parts; First, a mathematical relation among energy consumption, low response time and high traffic streams. Second, various approaches provided for reducing an energy without affecting response time and which provides high performance in overall stream computing in big data. Third, re-storm deployed energy efficient traffic aware scheduling on the storm platform. It allocates worker nodes online by using hot-swapping technique with task utilizing by energy consolidation through graph partitioning. Moreover, re-storm is achieved high energy efficiency, low response time in all types of data arriving speeds.it is suitable for allocation of worker nodes in a storm topology. Experiment results have been demonstrated the comparing existing strategies which are dealing with energy issues without affecting or reducing response time for a different data stream speed levels. Finally, it shows that the re-storm platform achieved high energy efficiency and low response time when compared to all existing approaches.

DSF studies towards energy efficiency for a tall building design in the Mediterranean climate

2020 ◽  
pp. 165-179
Author(s):  
T Saroglou ◽  
T Theodosiou ◽  
I. A. Meir
Keyword(s):  
Energy Efficiency ◽  
Thermal Comfort ◽  
Energy Efficient ◽  
Mediterranean Climate ◽  
Tall Buildings ◽  
Building Design ◽  
High Energy ◽  
Tall Building ◽  
Energy Demands ◽  
The Mediterranean

Tall buildings around the world are increasing at an accelerating pace. However, this fast-pace development is not in tandem with today’s environmental considerations towards reducing high carbon emissions, mainly relating to the building sector (close to 50% of carbon dioxide (CO2) emissions). The vast scale and energy demands of tall buildings call for an in-depth study of this building typology towards improving energy efficiency. An important consideration for lowering energy demands is the configuration of the building envelope that acts as the mediator between indoor and outdoor conditions, according to the climate and microclimate of the building’s location. Current architectural practices of fully glazed curtain wall envelopes make this relationship problematic, by resulting in high-energy loads for achieving thermal comfort. Over the last few years, a step forward towards energy efficiency is the use of a double-skin façade (DSF). Its application, however, is lacking consideration of the specific climatic conditions that will essentially result in an energy efficient design. Previous research revealed that the most energy efficient DSF in the Mediterranean climate is with LowE glazing as the outside DSF layer. Further studies on DSF cavity width for a hot climate, were in favour of wider cavities, as these reduce the high cooling loads that are associated with this climate. Additionally, simulations of an office building in the Mediterranean climate, confirmed that cooling energy is also present during winter (airtight DSF), suggesting for a more active DSF envelope design throughout the year. A further study is then conducted through simulations, where the DSF design alternates between an open / closed DSF, and comparisons are made in relation to DSF width, building height above ground, outdoor environmental conditions and interior thermal comfort, for further improving the energy efficiency of tall building design.

A Network Coding-Based Energy-Efficient Multicast Routing in Multi-Hop Wireless Networks

2013 ◽  
Vol 765-767 ◽  
pp. 1775-1779
Author(s):  
Ding De Jiang ◽  
Ya Li ◽  
Wei Han Zhang ◽  
Wen Pan Li ◽  
Chun Ping Yao
Keyword(s):  
Energy Efficiency ◽  
Wireless Networks ◽  
Network Coding ◽  
Energy Efficient ◽  
Multicast Routing ◽  
Routing Algorithm ◽  
Performance Improvements ◽  
And Performance ◽  
Multicast Routing Algorithm ◽  
New Generation

In this paper, an energy-efficient multicast routing algorithm in multi-hop wireless networks is proposed aiming at new generation wireless communications. Different from the previous methods, this paper targets maximizing the energy efficiency of networks. In order to get the optimal energy efficiency to build the network multicast route, our proposed method tries to maximize the network throughput and minimize the network energy consumption by exploiting network coding and sleeping scheme. Simulation results show that the proposed algorithm has better energy efficiency and performance improvements comparing with the existing methods.

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