An Optimal Switching-off eNB Selection Algorithm in LTE Hyper-dense Networks

2015 ◽  
Vol 7 (4) ◽  
pp. 57-68
Author(s):  
Ding Fei ◽  
Tong En ◽  
Pan Zhiwen ◽  
You Xiaohu ◽  
Song Aigu
Keyword(s):  
Energy Conservation ◽  
Conservation Strategy ◽  
Sleep Mode ◽  
Optimal Switching ◽  
Coverage Area ◽  
Dense Networks ◽  
Network Load ◽  
Simultaneous Switching ◽  
Saving Effect

Although the application of the exhaustive search (ES) algorithm in the energy conservation strategy can realize the simultaneous switching off of multiple eNBs in the existing eNB-based (Evolved Node B) networks, it fails to satisfy the practical requirement of network deployment with the heavy computation burden. On account of this, this paper proposes an optimal switching-off eNB selection (OSS) algorithm in homogeneous networks. By selecting a certain cell within the coverage of multiple eNBs, the OSS algorithm can make an evaluation of the increment of network load caused by the switching off of various eNBs in the coverage area. Then it can sort one by one all of the eNBs that are to be switched off under the condition that the QoS (Quality of service) requirement of all of the users has been met. Afterwards, the OSS algorithm will switch the users according to the principle of least network load increment and eventually find an eNB that shows the optimal energy saving effect in sleep mode. The simulation results reveal that the OSS algorithm can satisfy the requirement of efficient energy conservation in wireless networks. Additionally, with low computational complexity, it also will facilitate network deployment.

Research on Energy Saving in Cellular Networks Based on Dynamic Load Balancing

2014 ◽  
Vol 721 ◽  
pp. 720-723
Author(s):  
Jian Bin Xue ◽  
Feng Jie He ◽  
Bo Liang
Keyword(s):  
Load Balancing ◽  
Cellular Networks ◽  
Blocking Probability ◽  
Dynamic Load Balancing ◽  
Sleep Mode ◽  
Call Blocking ◽  
Call Blocking Probability ◽  
Network Load ◽  
Exchange Information

In this paper, in order to balance the network load and make a part of the stations into the sleep mode, we adopted a load balancing scheme in relay-assisted cellular networks. In the proposed distributed algorithm, relay station only needs to exchange information with its neighboring which bases stations and makes a re-association decision by itself. So it can balance the load and decrease the call blocking probability, and then reduce the network energy consumption. According to the approach of tabu search, we can find the optimal mode combination and ensure the Qos (quality of service) which is presented.

Rack aware scheduling in HPC data centers: an energy conservation strategy

2012 ◽  
Vol 16 (3) ◽  
pp. 559-573 ◽  
Author(s):  
Vikas Ashok Patil ◽  
Vipin Chaudhary
Keyword(s):  
Energy Conservation ◽  
Data Centers ◽  
Conservation Strategy

scholarly journals Cluster-Based Cooperative Cache Deployment and Coded Delivery Strategy in C-V2X Networks

2021 ◽  
Vol 2021 ◽  
pp. 1-19
Author(s):  
Haizhou Bao ◽  
Yiming Huo ◽  
Chuanhe Huang ◽  
Xiaodai Dong ◽  
Wanyu Qiu
Keyword(s):  
High Reliability ◽  
Cluster Head ◽  
Cluster Method ◽  
Response Delay ◽  
Delivery Strategy ◽  
Network Load ◽  
Cooperative Cache ◽  
Dynamic Topology ◽  
Cache Hit Ratio

Cellular vehicle-to-everything- (C-V2X-) based communications can support various content-oriented applications and have gained significant progress in recent years. However, the limited backhaul bandwidth and dynamic topology make it difficult to obtain the multimedia service with high-reliability and low-latency communication in C-V2X networks, which may degrade the quality of experience (QoE). In this paper, we propose a novel cluster-based cooperative cache deployment and coded delivery strategy for C-V2X networks to improve the cache hit ratio and response time, reduce the request-response delay, and improve the bandwidth efficiency. To begin with, we design an effective vehicle cluster method. Based on the constructed cluster, we propose a two-level cooperative cache deployment approach to cache the frequently requested files on the edge nodes, LTE evolved NodeB (eNodeB) and cluster head (CH), to maximize the overall cache hit ratio. Furthermore, we propose an effective coded delivery strategy to minimize the network load and the ratio of redundant files. Simulation results demonstrate that our proposed method can effectively reduce the average response delay and network load and improve both the hit ratio and the ratio of redundant files.

scholarly journals Discussion on the Application of New Photovoltaic Energy in Building Electrical Energy Saving

2020 ◽  
Vol 9 (1) ◽  
pp. 1
Author(s):  
Qian Yang
Keyword(s):  
Energy Conservation ◽  
Construction Industry ◽  
Construction Projects ◽  
Negative Impact ◽  
Rapid Development ◽  
Social Economy ◽  
Green Building ◽  
Electrical Energy ◽  
New Energy

<p>With the rapid development of social economy, the demand for new energy is also increasing, and then the problem of large consumption also has a negative impact on the development of the construction industry. Under the concept of green building, the design and construction units pay more attention to energy conservation and environmental protection, so they actively use photovoltaic new energy in the field of electrical energy conservation of construction projects, so as to improve people's quality of life. Starting from the principles and characteristics of building electrical energy conservation, this paper discusses the methods of building electrical energy conservation, and analyzes how to use photovoltaic new energy in the field of building electrical energy conservation, hoping to better practice the concept of energy conservation.</p>

scholarly journals PENGARUH PENERAPAN TEKNIK KONSERVASI ENERGI DENGAN PEMBERDAYAAN DIRI TERHADAP KUALITAS HIDUP PASIEN GAGAL GINJAL KRONIK

2019 ◽  
Vol 9 (3) ◽  
pp. 219-224
Author(s):  
Nieniek Ritianingsih
Keyword(s):  
Quality Of Life ◽  
Energy Conservation ◽  
Intervention Group ◽  
Control Group ◽  
P Value ◽  
Control Group Design ◽  
Group Design ◽  
Post Test ◽  
Test Control

Penyakit gagal ginjal kronis atau disingkat GGK, saat ini diakui sebagai prioritas kesehatan masyarakat di seluruh dunia. Pasien GGK akan mengalami  gangguan fisik dan psikologis sehingga mempengaruhi kualitas hidupnya. Teknik konservasi energi dengan pemberdayaan diri dapat diberikan pada pasien GGK dengan tujuan dapat meningkatkan energi, mengurangi fatigue dan kualitas hidup dapat meningkat. Penelitian ini bertujuan untuk mengetahui pengaruh penerapan teknik konservasi energi dengan pemberdayaan diri terhadap kualitas hidup pasien gagal ginjal kronik.Hipotesis penelitian ini adalah teknik konservasi energydengan pemberdayaan diridapat meningkatkan kualitas hidup pasien GGK.   Responden penelitian ini berjumlah 47 orang untuk kelompok intervensi dan untuk kelompok kontrol 47 orang responden. Penelitian ini merupakan penelitian kuantitatif menggunakan metoda kuasi eksperimental dengan pendekatan pre test – post test control group design. Hasil uji statistik didapatkan nilai p value 0,000 maka dapat disimpulkan ada perbedaan yang signifikan antara  kualitas hidup  kelompok kontrol dengankualitas hidup kelompok intervensi setelah dilakukan penerapan teknik konservasi energy. Perawat agar menerapkan tehnik konservasi energy sebagai suatu program terstruktur dari intervensi keperawatan bagi pasien GGK   Kata kunci : teknik konservasi energi, kualitas hidup, GGK   THE EFFECT OF THE APPLICATION OF ENERGY CONSERVATION TECHNIQUES WITH SELF-EMPOWERMENT TO THE QUALITY OF LIFE OF PATIENTS WITH CHRONIC RENAL FAILURE   ABSTRACT Chronic kidney failure or abbreviated CRF, is currently recognized as a public health priority throughout the world. GGK patients will experience physical and psychological disorders that affect their quality of life. Energy conservation techniques with self-empowerment can be given to CRF patients with the aim of increasing energy, reducing fatigue and quality of life can be increased. This study aims to determine the effect of the application of energy conservation techniques with self-empowerment to the quality of life of patients with chronic renal failure. The hypothesis of this study is conservation techniques of energy with empowerment can improve the quality of life of patients with CRF. The respondents of this study were 47 people for the intervention group and for the control group 47 respondents. This research is a quantitative research using a quasi-experimental method with a pre test - post test control group design approach. The statistical test results obtained p value 0,000, it can be concluded that there is a significant difference between the quality of life of the control group and the quality of life of the intervention group after the application of energy conservation techniques. The nurse is to apply energy conservation techniques as a structured program of nursing interventions for CRF patients   Keywords: energy conservation techniques, quality of life, CRF

scholarly journals Differential Evolution in Wireless Communications: A Review

2019 ◽  
Vol 15 (11) ◽  
pp. 29
Author(s):  
Hilary I Okagbue ◽  
Muminu O Adamu ◽  
Timothy A Anake
Keyword(s):  
Wireless Communications ◽  
Differential Evolution ◽  
Computational Method ◽  
Biological Processes ◽  
Search Region ◽  
Coverage Area ◽  
Related Field ◽  
Research Areas ◽  
Scientific Fields

<p class="0abstract">Differential Evolution (DE) is an evolutionary computational method inspired by the biological processes of evolution and mutation. DE has been applied in numerous scientific fields. The paper presents a literature review of DE and its application in wireless communication. The detailed history, characteristics, strengths, variants and weaknesses of DE were presented. Seven broad areas were identified as different domains of application of DE in wireless communications. It was observed that coverage area maximisation and energy consumption minimisation are the two major areas where DE is applied. Others areas are quality of service, updating mechanism where candidate positions learn from a large diversified search region, security and related field applications. Problems in wireless communications are often modelled as multiobjective optimisation which can easily be tackled by the use of DE or hybrid of DE with other algorithms. Different research areas can be explored and DE will continue to be utilized in this context.</p>

Crash Safety and Light Quality of Automobile Bumper Made of Tube Filled with Foam Aluminum

2012 ◽  
Vol 619 ◽  
pp. 168-171
Author(s):  
Ying Hua Yu ◽  
Hai Nan Tan ◽  
Kun Yang ◽  
Ping Ping Wang
Keyword(s):  
Finite Element ◽  
Energy Conservation ◽  
Light Quality ◽  
Steel Tube ◽  
Vehicle Safety ◽  
Metal Tube ◽  
Foam Aluminum ◽  
Crash Safety ◽  
Collision Condition

Taking hollow steel tube bumper as the prototype, the structure of steel bumper filled with foam aluminum was simplified preliminary. Then the finite element deformations of two bumper structures were analyzed in the same collision condition. And the quality of two bumper structures were calculated and compared. The results show that automobile bumper made of metal tube filled with foam aluminum can improve the cash safety and reduce the quality of the car significantly. This research provides a new way to improve vehicle safety, energy conservation and environmental protection.

Effect of Prismatic Skylight on the Power Consumption and Air-Conditioning Loads

2011 ◽  
Author(s):  
Sebastian Munera ◽  
Yong X. Tao
Keyword(s):  
Energy Consumption ◽  
Energy Conservation ◽  
Residential Buildings ◽  
Commercial Buildings ◽  
Conservation Strategy ◽  
Electromagnetic Spectrum ◽  
Base Line ◽  
Humid Climate ◽  
Big Box ◽  
Hot And Humid Climate

The use of Prismatic Skylights and its effects as a passive Energy Conservation Strategy in “Residential” and “Big Box Commercial Buildings” in hot and humid climate has been evaluated throughout this project. The potential benefits of using skylights reside in the fact that it reduces electrical lighting necessities but at the same time it contributes to an upsurge of the Cooling Loads of the conditioned space. Acknowledging the impact of skylights is fundamental to elaborate an optimized design of a building’s energy efficient mechanical system. To reach a sound conclusion, the evaluated buildings were modeled and their performance was simulated using the Department of Energy Simulation Program “Energy Plus”. To be able to compare the Energy Conservation Measure case (Using Skylights) with the Base Line (No Skylights), a photometric sensor was modeled to ensure that both cases sourced the same amount of light visible in the electromagnetic spectrum. Considering the Heating, Cooling and lighting energy consumption as variables, the variance between the ECM and the Base line for the residential case was 5% more energy consumption with skylights. For the Big Box Commercial Building there was a 5% deduction in energy consumption in the ECM case using 5% roof area covered with skylights. The results obtained from this investigation reveal a very promising effect in the implementation of skylights in “Big Box Commercial Buildings”, but not so optimistic in the case of “Residential Buildings” for hot and humid climate as shown by the simulation and monitoring data from the experimental case.

scholarly journals Integrating Satellite-Derived Data as Spatial Predictors in Multiple Regression Models to Enhance the Knowledge of Air Temperature Patterns

Urban Science ◽  
2019 ◽  
Vol 3 (4) ◽  
pp. 101 ◽  
Author(s):  
Lucille Alonso ◽  
Florent Renard
Keyword(s):  
Remote Sensing ◽  
Air Temperature ◽  
Urban Areas ◽  
Land Development ◽  
Explanatory Variables ◽  
Dense Networks ◽  
Urban Heat ◽  
Derived Data ◽  
Computer Resources

With the phenomenon of urban heat island and thermal discomfort felt in urban areas, exacerbated by climate change, it is necessary to best estimate the air temperature in every part of an area, especially in the context of the on-going rationalization weather stations network. In addition, the comprehension of air temperature patterns is essential for multiple applications in the fields of agriculture, hydrology, land development or public health. Thus, this study proposes to estimate the air temperature from 28 explanatory variables, using multiple linear regressions. The innovation of this study is to integrate variables from remote sensing into the model in addition to the variables traditionally used like the ones from the Land Use Land Cover. The contribution of spectral indices is significant and makes it possible to improve the quality of the prediction model. However, modeling errors are still present. Their locations and magnitudes are analyzed. However, although the results provided by modelling are of good quality in most cases, particularly thanks to the introduction of explanatory variables from remote sensing, this can never replace dense networks of ground-based measurements. Nevertheless, the methodology presented, applicable to any territory and not requiring specific computer resources, can be highly useful in many fields, particularly for urban planners.

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