scholarly journals Assessment of Call Voice Quality of GSM Network Operators in 5 Cities in Kwara State

2019 ◽  
pp. 1-7
Author(s):  
K. O. Kadiri ◽  
Samuel Oluwaseun Lawal ◽  
Olawale Saheed Babatunde
Keyword(s):  
Quality Of Service ◽  
Network Performance ◽  
Positive Impact ◽  
Voice Quality ◽  
Success Rates ◽  
International Telecommunication Union ◽  
Perceptual Evaluation ◽  
Gsm Network ◽  
Set Up

This paper evaluates voice quality of four Global System for Mobile (GSM) Communication providers in five selected cities in Kwara State with thoughtfulness of network performance evaluation and the quality of service (QoS) improvement of GSM network system. Three assessment components/parameters which are network accessibility, service retainability and connection quality for evaluating QoS on the network were mainly adopted. The parameters were applied on four GSM networks in the studied areas using customers’ complaints method. Also, a standard method known as Perceptual Evaluation of Speech Quality (PESQ) — (International Telecommunication Union-Telecommunication Standardization Sector) ITU-T standard P.862, used for measuring call voice quality and Mean Opinion Score (MOS) is adopted. The two methods were therefore compared to assess call voice quality of the four GSM networks. The Key Performance Indicators (KPIs) on which the GSM networks were tested include call set-up success rates (CSSR), call drop rate (CDR), call completion success rates (CCSR), handover success rates (HSR) and traffic channel congestion rate (TCHR). The result of the study shows that the Quality of Service of GSM system in the selected cities is unreliable. The study also shows that the GSM network accessibility and retainability in the country are unsatisfactory. However, the call voice quality was observed to be on the peak in these cities across the four network providers. At the end of this manuscript, suggestions are given on how to advance both the Quality of Service and the positive impact of GSM network in the selected areas and the country as a whole.

Demand of Wireless Network and Security in Current Research

2015 ◽  
Vol 14 (6) ◽  
pp. 5809-5813
Author(s):  
Abhishek Prabhakar ◽  
Amod Tiwari ◽  
Vinay Kumar Pathak
Keyword(s):  
Wireless Networks ◽  
Quality Of Service ◽  
Wireless Network ◽  
Network Performance ◽  
Wireless Security ◽  
Human Intervention ◽  
Unauthorized Access ◽  
Quality Of Service Parameters ◽  
Wireless Infrastructure

Wireless security is the prevention of unauthorized access to computers using wireless networks .The trends in wireless networks over the last few years is same as growth of internet. Wireless networks have reduced the human intervention for accessing data at various sites .It is achieved by replacing wired infrastructure with wireless infrastructure. Some of the key challenges in wireless networks are Signal weakening, movement, increase data rate, minimizing size and cost, security of user and QoS (Quality of service) parameters... The goal of this paper is to minimize challenges that are in way of our understanding of wireless network and wireless network performance.

scholarly journals A Randomized Controlled Trial of Two Semi-Occluded Vocal Tract Voice Therapy Protocols

2015 ◽  
Vol 58 (3) ◽  
pp. 535-549 ◽  
Author(s):  
Mara R. Kapsner-Smith ◽  
Eric J. Hunter ◽  
Kimberly Kirkham ◽  
Karin Cox ◽  
Ingo R. Titze
Keyword(s):  
Quality Of Life ◽  
Vocal Tract ◽  
Controlled Trial ◽  
Voice Quality ◽  
Voice Handicap Index ◽  
Voice Therapy ◽  
Control Group ◽  
Perceptual Evaluation ◽  
Therapy Program

PurposeAlthough there is a long history of use of semi-occluded vocal tract gestures in voice therapy, including phonation through thin tubes or straws, the efficacy of phonation through tubes has not been established. This study compares results from a therapy program on the basis of phonation through a flow-resistant tube (FRT) with Vocal Function Exercises (VFE), an established set of exercises that utilize oral semi-occlusions.MethodTwenty subjects (16 women, 4 men) with dysphonia and/or vocal fatigue were randomly assigned to 1 of 4 treatment conditions: (a) immediate FRT therapy, (b) immediate VFE therapy, (c) delayed FRT therapy, or (d) delayed VFE therapy. Subjects receiving delayed therapy served as a no-treatment control group.ResultsVoice Handicap Index (Jacobson et al., 1997) scores showed significant improvement for both treatment groups relative to the no-treatment group. Comparison of the effect sizes suggests FRT therapy is noninferior to VFE in terms of reduction in Voice Handicap Index scores. Significant reductions in Roughness on the Consensus Auditory-Perceptual Evaluation of Voice (Kempster, Gerratt, Verdolini Abbott, Barkmeier-Kraemer, & Hillman, 2009) were found for the FRT subjects, with no other significant voice quality findings.ConclusionsVFE and FRT therapy may improve voice quality of life in some individuals with dysphonia. FRT therapy was noninferior to VFE in improving voice quality of life in this study.

scholarly journals The Influence of Price, Quality of Service and Promotions on Customer Satisfaction at Bu Rajab Resto Pancing and Cottage

2021 ◽  
Author(s):  
Rabhi Fathan Muhammad ◽  
Tina Melinda
Keyword(s):  
Quality Of Service ◽  
Data Analysis ◽  
Linear Regression ◽  
Data Collection ◽  
Customer Satisfaction ◽  
Service Quality ◽  
Hypothesis Testing ◽  
Positive Impact ◽  
Collection Data

This study was conducted to analyze the influence of price (X1), service quality (X2) and promotions (X3) on customer satisfaction at Bu Rajab Resto Pancing and Cottage. The study used a quantitative approach and was conducted from March to June 2020. Purposive sampling was used. 120 people were included in the research and 97 people were selected as samples. Participants were customers of Bu Rajab Resto Pancing and Cottage who had visited at least 2 times. A questionnaire was used for data collection. Data analysis involved linear regression, hypothesis testing and classical assumption tests, using the SPSS program. Price and service quality had a significantly positive impact on customer satisfaction, but promotions did not. Keywords: price, service quality, promotion, customer satisfaction

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.

scholarly journals Virtual Link Aggregation Network Performance Using MikroTik Bonding

2020 ◽  
Vol 2 (2) ◽  
pp. 131-139
Author(s):  
Firmansyah Firmansyah ◽  
Mochamad Wahyudi ◽  
Rachmat Adi Purnama
Keyword(s):  
Quality Of Service ◽  
Transfer Rate ◽  
Network Performance ◽  
Data Packet ◽  
Virtual Link ◽  
Interface Bonding ◽  
Data Packets ◽  
Bandwidth Optimization ◽  
Network Link

Quality of Service in a network is a big thing that must be resolved and dealt with as best as possible. The limitation of the maximum transfer rate in network devices creates an obstacle in the process of transferring data packets. To maximize the transfer rate in network devices, you can use Virtual Link Aggregation which can offer bandwidth optimization and failover in the network. Link aggregation is a solution in combining several physical links into one logical link. The method used in this research is to consider the allocation of bandwidth, load balancing and failover in the link aggregation. From the results of the link aggregation test using two (2) interface bonding, the results of the bandwidth averages when there is a UPD data packet transfer to 0 bps / 184.9 Mbps, which was previously around 0 bps / 91.6 Mbps. While the result of the bandwidth averages when the TCP data packet transfer occurs is 0 bps / 105.5 Mbps, which was previously around 0 bps / 93.8 Mbps. Link Aggregation using a Mikrotik Router is a solution to produce a larger Throughput Bandwidth by combining two (2) Ethernet Physical Links into one logical link.

Voice and Video over Gigabit Ethernet and ATM Backbone Networks

2014 ◽  
pp. 174-184
Author(s):  
Nurul I. Sarkar ◽  
Yash Dole
Keyword(s):  
Quality Of Service ◽  
Network Performance ◽  
Performance Metrics ◽  
Asynchronous Transfer Mode ◽  
Atm Networks ◽  
Gigabit Ethernet ◽  
Corporate Networks ◽  
Backbone Networks ◽  
Network Technologies

This chapter aims to report on the performance of voice and video traffic over two popular backbone network technologies, namely Gigabit Ethernet (GbE) and Asynchronous Transfer Mode (ATM). ATM networks are being used by many universities and organizations for their unique characteristics such as scalability and guaranteed Quality of Service (QoS), especially for voice and video applications. Gigabit Ethernet matches ATM functionality by providing higher bandwidth at much lower cost, less complexity, and easier integration into the existing Ethernet technologies. It is useful to be able to compare these two technologies against various network performance metrics to find out which technology performs better for transporting voice and video conferencing. This chapter provides an in-depth performance analysis and comparison of GbE and ATM networks by extensive OPNET-based simulation. The authors measure the Quality of Service (QoS) parameters, such as voice and video throughput, end-to-end delay, and voice jitter. The analysis and simulation results reported in this chapter provide some insights into the performance of GbE and ATM backbone networks. This chapter may help network researchers and engineers in selecting the best technology for the deployment of backbone campus and corporate networks.

The Effects of Endoscopic Sinus Surgery on Voice Characteristics in Chronic Rhinosinusitis Patients

2019 ◽  
Vol 128 (12) ◽  
pp. 1129-1133
Author(s):  
Danny B. Jandali ◽  
Ashwin Ganti ◽  
Inna A. Husain ◽  
Pete S. Batra ◽  
Bobby A. Tajudeen
Keyword(s):  
Quality Of Life ◽  
Chronic Rhinosinusitis ◽  
Endoscopic Sinus Surgery ◽  
Tertiary Care ◽  
Voice Quality ◽  
Upper Airway ◽  
Sinus Surgery ◽  
Perceptual Evaluation ◽  
Snot 22

Objectives: Functional endoscopic sinus surgery (FESS) is a standard treatment modality for patients with chronic rhinosinusitis (CRS) who have failed appropriate medical therapy. However, FESS entails modification of the upper airway tract that may alter phonatory resonance and produce voice changes. The effects of FESS on postoperative voice characteristics in patients with CRS have yet to be quantitatively assessed. Methods: Patients with severe CRS who underwent FESS at a tertiary care referral center between May and October 2017 were prospectively enrolled. The Consensus Auditory-Perceptual Evaluation of Voice (CAPE-V) and the Voice Handicap Index (VHI) were used to quantitatively evaluate voice characteristics and quality of life, respectively. Preoperative and postoperative CAPE-V and VHI scores were compared with postoperative scores for each patient. Sino-Nasal Outcome Test (SNOT-22) scores were also obtained to assess changes in patient symptoms. Results: 18 CRS patients undergoing FESS were enrolled. The average preoperative Lund-Mackay score was 14, indicating baseline severe CRS. Postoperative assessments demonstrated a statistically significant decrease in CAPE-V (45-27, p = .005) and VHI (10-4.7, p < .001) scores. These correlated with a statistically significant decrease in SNOT-22 scores (42-13, p < .001). Conclusions: Patients with CRS experience a significant improvement in voice characteristics and vocal quality of life following FESS. Furthermore, this appears to correlate with a significant decrease in self-reported disease severity. These findings may augment the discussion of potential benefits of FESS to a new potential domain for voice quality.

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