scholarly journals Performance assessment of VoIP service over different handover mechanisms in UMTS networks

2021 ◽  
Vol 11 (5) ◽  
pp. 4214
Author(s):  
Qusay Jalil Kadhim ◽  
Ali M. Alsahlany ◽  
Ahmed Hassan Hadi
Keyword(s):  
Mobile Networks ◽  
Transition Process ◽  
Mobile Telecommunication ◽  
Telecommunication System ◽  
Soft Handover ◽  
Opinion Score ◽  
The Impact ◽  
The Voice ◽  
Umts Networks

Many researchers have discussed various topics in universal mobile telecommunication system (UMTS) networks: the process of switching from one cell to another for the subscriber and the impact of the quality of the connection during the transition process, quality of services (QoS), the quality of the uplink and downlink carrier line, the various types of code for the voice transmitted through the Internet, especially the research that discussed voice over internet protocol (VoIP) technology as voice travels from cell to cell in mobile networks, depending on the type of delivery. In this paper, a proposed scenario of a UMTS network was implemented to evaluate the multicellular VoIP movement; the proposed UMTS network was simulated using the OPNET 14.5 simulator. The calculation and analysis of the different parameters of the user while moving from one cell to another with different movement speeds considered, the best mean opinion score (MOS) value (3.19) registered for the scenario (soft handover) comparing with another type of handover (3.00).

scholarly journals Impact of After-Sales Service on Customers� Retention of Mobile Telecommunications in Nigeria

2020 ◽  
Vol 3 (2) ◽  
Author(s):  
Fasanmi Olumuyiwa Oladapo
Keyword(s):  
Mobile Networks ◽  
Computer Software ◽  
Sampling Technique ◽  
Simple Random Sampling ◽  
P Value ◽  
Mobile Telecommunication ◽  
Software Packages ◽  
The Impact ◽  
The Relationship

The idea of after-sales services has been adopted globally to provide the consumers after the product or services rendered. The study explored the impact of after-sales services on customers� retention of mobile telecommunication in Nigeria. Survey research was adopted, and the aim of using this design is premised on the fact that the study relied on obtaining information from the field using a questionnaire. The population consist of all the subscribers of MTN, Globacom, Airtel and 9mobile. Four hundred seventy-two (472) subscribers of mobile networks were proportionally drawn from the NCC website. Subsequently, a simple random sampling technique was used to select the respondents from each of the mobile networks. Data collected were analysed using an application of simple percentage method in computer software packages (SPSS), and the regression analysis adopted by the testing of a reported hypothesis. The regression of [t-statistics] value of .01 and [2.63] demonstrates that the relationship between after-sale service and retention of customers is essential because the alpha level of 0.05 is higher than the p-value. Hence, the assumption is that growth in after-sales activities is a significant contributor to customer retention. Management should pay attention to the employee position to the quality of after-sales service, which results in future procurement and further recommendations.

scholarly journals Measuring Key Quality Indicators in Cloud Gaming: Framework and Assessment Over Wireless Networks

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1387
Author(s):  
Oswaldo Sebastian Peñaherrera-Pulla ◽  
Carlos Baena ◽  
Sergio Fortes ◽  
Eduardo Baena ◽  
Raquel Barco
Keyword(s):  
Communication Networks ◽  
Mobile Networks ◽  
Video Game ◽  
Know How ◽  
Fifth Generation ◽  
New Generation ◽  
Graphics Rendering ◽  
The Impact

Cloud Gaming is a cutting-edge paradigm in the video game provision where the graphics rendering and logic are computed in the cloud. This allows a user’s thin client systems with much more limited capabilities to offer a comparable experience with traditional local and online gaming but using reduced hardware requirements. In contrast, this approach stresses the communication networks between the client and the cloud. In this context, it is necessary to know how to configure the network in order to provide service with the best quality. To that end, the present work defines a novel framework for Cloud Gaming performance evaluation. This system is implemented in a real testbed and evaluates the Cloud Gaming approach for different transport networks (Ethernet, WiFi, and LTE (Long Term Evolution)) and scenarios, automating the acquisition of the gaming metrics. From this, the impact on the overall gaming experience is analyzed identifying the main parameters involved in its performance. Hence, the future lines for Cloud Gaming QoE-based (Quality of Experience) optimization are established, this way being of configuration, a trendy paradigm in the new-generation networks, such as 4G and 5G (Fourth and Fifth Generation of Mobile Networks).

scholarly journals A comparative study of the voice-related quality of life among Egyptian elderly with and without voice complaints

2020 ◽  
Vol 36 (1) ◽  
Author(s):  
Nesreen Fathi Mahmoud ◽  
Huda Zahran ◽  
Sherif Abdelmonam
Keyword(s):  
Quality Of Life ◽  
Elderly Population ◽  
Life Quality ◽  
Voice Disorders ◽  
The Elderly ◽  
Different Types ◽  
Related Quality ◽  
The Impact ◽  
The Voice

Abstract Background This study focuses on the self-perception of the voice in the elderly as assessed by the Voice-Related Quality of Life (V-RQOL) questionnaire. This work aimed to compare differences in the voice-related quality of life outcomes between (1) elderly with and without voice disorders, (2) female and male elderly with voice disorders, and (3) different types of voice disorders, and to explore the correlation between the V-RQOL and perceptual analysis done by the clinician. Forty-three dysphonic and 44 non-dysphonic elderly filled out the Voice-Related Quality of Life (V-RQOL) protocol that analyzes the impact of dysphonia on life quality. Vocal perceptual assessment of each subject with dysphonia was made by three voice therapists, followed by a flexible nasofibrolaryngoscope. Results A significant statistical difference was found between the means of total V-RQOL scores and its subdomains for each group (dysphonic and non-dysphonic). No significant differences were found between male and female elderly with dysphonia. The statistical analysis showed a significant correlation with the vocal assessment made by the clinicians and the V-RQOL self-assessment made by the subjects. Conclusions This study provides valuable information regarding the risk factors that contribute to vocal quality in the elderly population. Our results revealed that different types of voice disorders are common among the elderly population with significant negative effects on quality of life. It was observed that the poorest score on the V-RQOL was for functional voice disorders, followed by neoplastic lesions, whereas MAPLs had the best score on the V-RQOL.

scholarly journals A novel method for the codecs’ performance analysis in mobile telephony systems

2020 ◽  
Vol 33 (2) ◽  
pp. 243-259
Author(s):  
Aleksandar Lebl ◽  
Dragan Mitic ◽  
Vladimir Matic ◽  
Mladen Mileusnic ◽  
Zarko Markov
Keyword(s):  
Quality Of Service ◽  
Flow Rate ◽  
Mobile Communications ◽  
Voice Quality ◽  
Mobile Telephony ◽  
Mobile Telecommunication ◽  
Telecommunication System ◽  
Full Rate ◽  
Novel Method

This paper presents a novel method of expressing the quality of service in a mobile telecommunication system when its performance depends on several factors including applied codecs? characteristics (voice quality and data flow rate) and telecommunications traffic service possibilities. The influence of these factors is unified in one variable - quality of service measure. The proposed method is especially applicable in the cases when two-dimensional systems are analyzed - for example when two codecs with different flow rate and different achievable connection quality are used in a system. As an example, we also studied system with full-rate or mixed full-rate and half-rate codec implementation depending on the offered traffic. The system performances - mean dataflow and mean connection quality as a function of offered traffic are presented graphically and also expressed quantitatively by the novel quality of service measure. The systems with different number of available traffic channels may be compared on the base of this novel evaluation value such that the system with the highest value is the most suitable one for the concrete situation. In this way mobile system design is simplified to the great extent. The developed model is applicable generally for mobile telephony systems defining, but in this paper we studied its implementation for Global System for Mobile communications.

Optimizing the Traffic of Voice Core Domain in UMTS Network through RNC Re-Homing

2012 ◽  
pp. 227-240
Author(s):  
Ye Ouyang ◽  
Hosein Fallah
Keyword(s):  
Mobile Networks ◽  
Base Station ◽  
Third Generation ◽  
Core Network ◽  
Core Domain ◽  
Network Controller ◽  
Next Generation Mobile Networks ◽  
The Impact ◽  
Umts Networks

The past few years have seen mobile operators transition to next-generation mobile networks, specifically from third-generation networks (3G) to long term evolution (LTE). This paper describes the basic architecture and topology of UMTS R4 core network and introduces two options in network planning, i.e., flat structure or layered structure. This paper introduces the re-homing of radio network controller (RNC) and base station controller (BSC) and studies the impact on the performance of voice core of UMTS networks. The proposed RNC re-homing models are created and analyzed for voice core of UMTS networks. The paper concludes that the appropriate RNC re-homing optimizes the traffic of voice core in UMTS network.

Radio Resource Management Strategies for HSDPA-Enhanced UMTS Networks

2010 ◽  
pp. 31-54
Author(s):  
Dirk Staehle ◽  
Andreas Mäder
Keyword(s):  
Resource Management ◽  
Resource Sharing ◽  
High Speed ◽  
Radio Resource Management ◽  
Management Strategies ◽  
Mobile Telecommunication ◽  
Radio Resource ◽  
Telecommunication System ◽  
Packet Access ◽  
The Impact

This chapter gives an overview of the background and functionality of the high speed downlink packet access (HSDPA), and provides insights into the radio resource management of integrated UMTS/HSDPA networks. The high speed downlink packet access (HSDPA) is part of the evolution of the universal mobile telecommunication system (UMTS). It is often referred to as 3.5G system, in contrast to UMTS, which is a third generation system. The authors introduce aspects of radio resource management specific to the HSDPA like channel-aware scheduling and radio resource sharing strategies. Furthermore, the impact of radio resource management on the quality of service is analyzed and it is shown that the selection of an RRM strategy is an integral part of the network planning and deployment process

scholarly journals Open-Source Based Testbed for Multioperator 4G/5G Infrastructure Sharing in Virtual Environments

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Ricardo Marco Alaez ◽  
Jose M. Alcaraz Calero ◽  
Qi Wang ◽  
Fatna Belqasmi ◽  
May El Barachi ◽  
...  
Keyword(s):  
Open Source ◽  
Mobile Networks ◽  
Fourth Generation ◽  
Mobile Telecommunication ◽  
Significant Saving ◽  
Design And Implementation ◽  
Fifth Generation ◽  
The Impact ◽  
Telecommunication Operators

Fourth-Generation (4G) mobile networks are based on Long-Term Evolution (LTE) technologies and are being deployed worldwide, while research on further evolution towards the Fifth Generation (5G) has been recently initiated. 5G will be featured with advanced network infrastructure sharing capabilities among different operators. Therefore, an open-source implementation of 4G/5G networks with this capability is crucial to enable early research in this area. The main contribution of this paper is the design and implementation of such a 4G/5G open-source testbed to investigate multioperator infrastructure sharing capabilities executed in virtual architectures. The proposed design and implementation enable the virtualization and sharing of some of the components of the LTE architecture. A testbed has been implemented and validated with intensive empirical experiments conducted to validate the suitability of virtualizing LTE components in virtual infrastructures (i.e., infrastructures with multitenancy sharing capabilities). The impact of the proposed technologies can lead to significant saving of both capital and operational costs for mobile telecommunication operators.

QUALITY OF SERVICE ISSUES IN WIRELESS VOICE OVER INTERNET PROTOCOL

2017 ◽  
Vol 7 (10) ◽  
pp. 57
Author(s):  
Oladunni Abosede Daramola
Keyword(s):  
Quality Of Service ◽  
Internet Protocol ◽  
Voice Over Internet Protocol ◽  
Traffic Data ◽  
Voice Traffic ◽  
The Mean ◽  
The Impact ◽  
The Voice ◽  
Model Technique

Voice over Internet Protocol (VoIP) is a significant application of the converged network principle where the voice traffic is routed over Internet Protocol shared traffic networks. VoIP traffic was modelled over wireless network and a simulation of the traffic was transmitted over the network. E-model technique was used to analyze the traffic data and also to rate VoIP QoS parameters.  The result achieved was mapped to the Mean Opinion Scale to determine the Quality of Service of VoIP over wireless networks. The results shows that QoS in the VoIP communications is significantly impacted by these parameters and the impact varies according to the parameters and also the communication aspects selected for the VoIP traffic analysis.Keywords: VoIP, QoS, E-Model and Mean Opinion Scale  

THE INVESTIGATION OF VOICE HANDICAP INDEX IN TEACHERS WITH AND WITHOUT SELF-RATED VOICE DISORDERS

2018 ◽  
Vol 3 ◽  
pp. 169-178
Author(s):  
Baiba Trinite
Keyword(s):  
Daily Activity ◽  
Voice Disorders ◽  
Voice Handicap Index ◽  
Voice Disorder ◽  
Control Group ◽  
Physical Comfort ◽  
The Impact ◽  
The Voice ◽  
Emotional Condition

Voice disorders restrict daily activity and impact the quality of life. The purpose of the study was to find out the impact of voice disorders on  functional, physical and emotional condition of teachers with and without self-reported voice disorders. Two hundred thirty-five teachers with self-reported voice problems (Voice disorder group) and 174 teachers with no voice problems (Control group) in anamnesis completed Latvian version of Voice Handicap Index-30 (VHI-30). Teachers with voice disorders demonstrated higher median scores in VHI-30 total scale and functional, physical, and emotional subscales (P<0.001). In teachers, voice disorders have a more significant impact on their physical comfort and have a smaller impact on their emotional sphere. 76.4% of the voice disorder group respondents acquired the total score within 12 to 33 points. In the control group, 75.3% of teachers had the VHI score of up to 17 points. Conclusions: In teacher population of Latvia mild voice disorders are encountered more often. Activity and participation in everyday life situations are limited in teachers with voice disorders. Voice disorders mostly impact physical comfort in teachers.

An Analysis of the Impact of the Quality of Mobile Networks on the Use of Cloudlets

2014 ◽  
Author(s):  
Philipp B. Costa ◽  
Paulo A.L. Rego ◽  
Emanuel F. Coutinho ◽  
Fernando A.M. Trinta ◽  
Jose N. de Souza
Keyword(s):  
Mobile Networks ◽  
The Impact
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