Efficient Channel Utilization and Prioritization Scheme for Emergency Calls in Cellular Network

2014 ◽  
Vol 3 (3) ◽  
pp. 56-69
Author(s):  
K. N. Rama Mohan Babu ◽  
K.N. Balasubramanya Murthy ◽  
G.V. Pavithra ◽  
K.R Mamatha
Keyword(s):  
Cellular Networks ◽  
Cellular Network ◽  
Channel Utilization ◽  
Scheduling Scheme ◽  
Emergency Calls ◽  
Probabilistic Scheduling ◽  
Simulation Results ◽  
Prioritization Scheme ◽  
Better Than

Handling of emergency calls in wireless cellular networks is one of the major issues. The main objective here is to improve quality of service by efficient channel utilization. In this paper, a new scheme called probabilistic emergency prioritization scheme (PEPS) is proposed which provides highest priority for emergency calls. The proposed method minimizes the dropping or blocking of emergency calls even if the number of emergency calls are more than 25% of the calls. Monte Carlo simulation results show that the proposed scheme works better than the existing adaptive probabilistic scheduling scheme (APS).

scholarly journals Spectrum Opportunity Detection in Cellular Networks

2019 ◽  
Vol 9 (2) ◽  
pp. 2395-2399
Keyword(s):  
Cellular Networks ◽  
Fading Channel ◽  
Cellular Network ◽  
Wireless Channels ◽  
Research Work ◽  
Signal Propagation ◽  
Spatial Spectrum ◽  
Primary Users ◽  
Detection Probabilities ◽  
Better Than

The signal propagation over wireless channels cannot be predicted perfectly due to numerous factors such as fading, channel interference and obstacles. An interference footprint is required to be estimated accurately for evaluation of the spatial spectrum opportunity. It is difficult to determine the spatial spectrum opportunities available in uplink bands of cellular networks due to different location of primary users at different times. In this research work, spatial spectrum opportunity in uplink bands of cellular network is determined using an efficient computational geometry tool for realistic scenario. Our results shows that the performance of umbrella footprints based approach is better than that of conventional circular footprints based approach in terms of false alarm and missed detection probabilities.

A Novel Differentiate Weight Algorithm on Heterogeneous Network Selection

2013 ◽  
Vol 709 ◽  
pp. 593-598
Author(s):  
Wei Zhang ◽  
Xin Rong Wu ◽  
Wei Han ◽  
Ting Liu ◽  
Shun Jiang
Keyword(s):  
Heterogeneous Network ◽  
Network Selection ◽  
Average Weight ◽  
Qos Guarantee ◽  
Network Meeting ◽  
Target Network ◽  
Order Preference ◽  
Simulation Results ◽  
Better Than

How to select a target network meeting the needs of Quality of Service (QoS) guarantee in heterogeneous network environment has become a research hotspot. In this paper, a novel differentiate weight algorithm on heterogeneous network selection is proposed. As regard of the different needs of QoS for each class of traffic in heterogeneous network, the QoS parameter weight for each class of traffic is calculated by G1 method, and then the target network is selected by technique for order preference by similarity to ideal solution (TOPSIS). At last, simulation results show that the algorithm proposed in this paper is better than average weight algorithm on selecting target network reasonably and balancing network loads.

scholarly journals Access Channel Selection for WLAN using Fuzzy Expert System

2018 ◽  
Vol 7 (3.7) ◽  
pp. 34
Author(s):  
Bakeel Maqhat ◽  
Mohd Dani Baba ◽  
Ruhani Ab Rahman ◽  
Anwar Saif
Keyword(s):  
Expert System ◽  
Fuzzy Expert System ◽  
Network Scheduling ◽  
System Utilization ◽  
Scheduling Scheme ◽  
Access Channel ◽  
802.11 Wlan ◽  
Simulation Results ◽  
Selection For

The tremendous increase in user demands for multimedia applications with its various quality of service (QoS) requirements has become essential for the operators to accommodate the demand for real-time services in IEEE 802.11 WLAN network. Scheduling mechanism is one of the challenging issues still open for research to fully support the various QoS requirements. In this paper, scheduling scheme is proposed to manage the channel access parameter between competitive nodes. An embedded fuzzy expert system is used to dynamically allocation these parameters to the competitive stations. The simulation results show that the proposed algorithm manages to optimize the overall system utilization.  

scholarly journals A NEW SPEECH ENHANCEMENT TECHNIQUE USING PERCEPTUAL CONSTRAINED SPECTRAL WEIGHTING FACTORS

2012 ◽  
pp. 212-217
Author(s):  
T. Muni Kumar ◽  
M.B.Rama Murthy ◽  
Ch.V.Rama Rao ◽  
K.Srinivasa Rao
Keyword(s):  
Speech Enhancement ◽  
Weighting Factor ◽  
Wiener Filtering ◽  
Noise Masking ◽  
Enhancement Technique ◽  
Enhancement Method ◽  
Simulation Results ◽  
Spectral Weighting ◽  
Better Than

This paper deals with musical noise result from perceptual speech enhancement type algorithms and especially wiener filtering. Although perceptual speech enhancement methods perform better than the non perceptual methods, most of them still return annoying residual musical noise. This is due to the fact that if only noise above the noise masking threshold is filtered then noise below the noise masking threshold can become audible if its maskers are filtered. It can affect the performance of perceptual speech enhancement method that process audible noise only. In order to overcome this drawback here proposed a new speech enhancement technique. It aims to improve the quality of the enhanced speech signal provided by perceptual wiener filtering by controlling the latter via a second filter regarded as a psychoacoustically motivated weighting factor. The simulation results shows that the performance is improved compared to other perceptual speech enhancement methods

scholarly journals A Multidepth Load-Balance Scheme for Clusters of Congested Cells in Ultradense Cellular Networks

2020 ◽  
Vol 2020 ◽  
pp. 1-15
Author(s):  
Wei-Kuang Lai ◽  
Ya-Ju Yu ◽  
Pei-Lun Tsai ◽  
Meng-Han Shen
Keyword(s):  
Load Balancing ◽  
Cellular Networks ◽  
Load Balance ◽  
Small Cells ◽  
Radio Resource Allocation ◽  
Radio Resource ◽  
Fifth Generation ◽  
Simulation Results ◽  
Data Requirements

Densely deploying small cells will be a solution to provide explosive data requirements in fifth-generation networks. Because users often cluster together in popular locations of an urban area, congested small cells in the popular sites are also gathered. Traditional load balancing schemes generally only consider neighboring cells when offloading users are not suitable for clusters of overloaded cells. This paper considers groups of overloaded cells in the load balancing problem. The objective is to maximize the quality-of-service satisfaction ratio. To solve the problem, we propose a multidepth offloading algorithm with the consideration of the radio resource allocation. The proposed multidepth offloading algorithm can be applied no matter that congested small cells are gathered or not. Compared with a previous offloading algorithm and a baseline, the simulation results show that our proposed algorithm can increase 16% QoS satisfaction ratio in a real user distribution and 13% QoS satisfaction ratio in a clustered user placement.

scholarly journals Interference Mitigation Method in Hybrid D2D and Cellular Network

2017 ◽  
Vol 1 (3) ◽  
Author(s):  
Mohammed Hyder Mekki Sadig ◽  
Amin Babiker A/Nabi Mustafa
Keyword(s):  
Cellular Networks ◽  
Hybrid System ◽  
Cellular Network ◽  
Interference Mitigation ◽  
Frequency Allocation ◽  
Device To Device ◽  
Noise Ratio

This paper studies the effect of Device-to-Device interference in cellular networks. The focus of this study is the underlay inband interference resulting from sharing the same frequency. We propose a new mechanism that alleviates the effect of the additional interference in this hybrid system. Utilizing this interference mitigation method does not violate the frequency allocation of the cellular network. The quality of the studied network is evaluated using signal to interference plus noise ratio (SINR). The proposed approach reduces the interference levels in the uplink mode by 55%.

scholarly journals Optimization of a gating system by means of simulation software to eliminate cold shut defects in casting

2021 ◽  
Vol 5 (1) ◽  
pp. 1-4
Author(s):  
Vladimír Šabík ◽  
Peter Futáš ◽  
Alena Pribulová ◽  
Petra Delimanová
Keyword(s):  
Computer Technology ◽  
Cellular Network ◽  
Software Verification ◽  
Current Trend ◽  
Simulation Software ◽  
Main Task ◽  
Gating System ◽  
Simulation Results ◽  
Wheel Casting

The current trend in foundries is to achieve the production of high quality and competitive cast components. The innovation and optimization of current processes is a necessary element to achieve this goal. With the help of numerical simulations, it is possible to replace financially demanding and time-consuming experiments in real conditions with simulations that can reliably represent foundry process using computer technology. By a detailed analysis of the simulation results, we can predict various risks that could negatively affect the production process. This article monitors the influence of changes in the design of the gating system on the surface quality of a clutch wheel casting made of ductile iron, in the production of which two models of the gating system for casting were constructed in CAD software. Verification of gating systems was performed using the simulation software NovaFlow & Solid. The aim of the design change of the gating system is to reduce the amount of liquid metal used per casting, which can have a significant economic impact on industrial production. For this purpose, several simulations of the gating system of the casting were performed, while 2 which are the most representative for the mentioned problem were selected for the needs of the article. The main task of the simulation was to set the cellular network and conditions as close as possible to the reality of casting and the subsequent design and modification of the gating system.

Kepuasan Masyarakat Terhadap Pelayanan Kelurahan Setelah Pemekaran Di Tangerang Selatan

Liquidity ◽  
2018 ◽  
Vol 2 (2) ◽  
pp. 151-159
Author(s):  
Pitri Yandri
Keyword(s):  
Public Perception ◽  
Service Personnel ◽  
Urban Services ◽  
Hospitality Workers ◽  
Care Workers ◽  
Before And After ◽  
Cartesian Diagram ◽  
Better Than

The purpose of this study is (1) to analyze public perception on urban services before and after the expansion of the region, (2) analyze the level of people's satisfaction with urban services, and (3) analyze the determinants of the variables that determine what level of people's satisfaction urban services. This study concluded that first, after the expansion, the quality of urban services in South Tangerang City is better than before. Secondly, however, public satisfaction with the services only reached 48.53% (poor scale). Third, by using a Cartesian Diagram, the second priority that must be addressed are: (1) clarity of service personnel, (2) the discipline of service personnel, (3) responsibility for care workers; (4) the speed of service, (5) the ability of officers services, (6) obtain justice services, and (7) the courtesy and hospitality workers.

Femtocell Selection Scheme for Reducing Unnecessary Handover and Enhancing Downlink QoS in Cognitive Femtocell Networks

2017 ◽  
Author(s):  
Hoang Nhu Dong ◽  
Hoang Nam Nguyen ◽  
Hoang Trong Minh ◽  
Takahiko Saba
Keyword(s):  
Cellular Networks ◽  
Estimation Methods ◽  
Mobility Prediction ◽  
Capacity Estimation ◽  
Femtocell Networks ◽  
Selection Scheme ◽  
Indoor Communications ◽  
Performance Results ◽  
Cognitive Femtocell

Femtocell networks have been proposed for indoor communications as the extension of cellular networks for enhancing coverage performance. Because femtocells have small coverage radius, typically from 15 to 30 meters, a femtocell user (FU) walking at low speed can still make several femtocell-to-femtocell handovers during its connection. When performing a femtocell-to-femtocell handover, femtocell selection used to select the target handover femtocell has to be able not only to reduce unnecessary handovers and but also to support FU’s quality of service (QoS). In the paper, we propose a femtocell selection scheme for femtocell-tofemtocell handover, named Mobility Prediction and Capacity Estimation based scheme (MPCE-based scheme), which has the advantages of the mobility prediction and femtocell’s available capacity estimation methods. Performance results obtained by computer simulation show that the proposed MPCE-based scheme can reduce unnecessary femtocell-tofemtocell handovers, maintain low data delay and improve the throughput of femtocell users. DOI: 10.32913/rd-ict.vol3.no14.536

Implementasi Voip Server Berbasis IPV6 Dengan Raspberry PI

2019 ◽  
Vol 9 (01) ◽  
pp. 47-54
Author(s):  
Rabbai San Arif ◽  
Yuli Fitrisia ◽  
Agus Urip Ari Wibowo
Keyword(s):  
Internet Protocol ◽  
Wireless Transmission ◽  
Raspberry Pi ◽  
Test Results ◽  
Average Delay ◽  
Ipv6 Network ◽  
Ip Network ◽  
Selection Of ◽  
Better Than

Voice over Internet Protocol (VoIP) is a telecommunications technology that is able to pass the communication service in Internet Protocol networks so as to allow communicating between users in an IP network. However VoIP technology still has weakness in the Quality of Service (QoS). VOPI weaknesses is affected by the selection of the physical servers used. In this research, VoIP is configured on Linux operating system with Asterisk as VoIP application server and integrated on a Raspberry Pi by using wired and wireless network as the transmission medium. Because of depletion of IPv4 capacity that can be used on the network, it needs to be applied to VoIP system using the IPv6 network protocol with supports devices. The test results by using a wired transmission medium that has obtained are the average delay is 117.851 ms, jitter is 5.796 ms, packet loss is 0.38%, throughput is 962.861 kbps, 8.33% of CPU usage and 59.33% of memory usage. The analysis shows that the wired transmission media is better than the wireless transmission media and wireless-wired.

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