Evaluating QoS in a Multi-Access Wireless Network

2010 ◽  
pp. 1-30
Author(s):  
Ronan Skehill ◽  
William Kent ◽  
Dorel Picovici ◽  
Michael Barry ◽  
Sean McGrath
Keyword(s):  
Quality Of Service ◽  
Admission Control ◽  
Control Strategies ◽  
End User ◽  
Ieee 802.11B ◽  
Test Platform ◽  
Tightly Coupled ◽  
Multi Access ◽  
The Impact

This chapter introduces quality of service in multi-access wireless networks. Specifically it demonstrates how QoS is implemented in IEEE 802.11 and UMTS. The chapter explains how these complementary technologies, when coupled together, provide a network that is greater than its individual parts. Combining these networks brings new network management challenges. To this end, the impact of joint admission control strategies on quality of service is evaluated. The evaluation is performed on an advanced test platform that replicates an integrated Release 4 UMTS network and standard IEEE 802.11b network. The results show that when UMTS and WLAN are tightly coupled, the end user enjoys a higher level of quality of service.

Evaluating QoS in a Multi-Access Wireless Network

2010 ◽  
pp. 1538-1568
Author(s):  
Ronan Skehill ◽  
William Kent ◽  
Dorel Picovici ◽  
Michael Barry ◽  
Sean McGrath
Keyword(s):  
Quality Of Service ◽  
Admission Control ◽  
Control Strategies ◽  
End User ◽  
Ieee 802.11B ◽  
Test Platform ◽  
Tightly Coupled ◽  
Multi Access ◽  
The Impact

This chapter introduces quality of service in multi-access wireless networks. Specifically it demonstrates how QoS is implemented in IEEE 802.11 and UMTS. The chapter explains how these complementary technologies, when coupled together, provide a network that is greater than its individual parts. Combining these networks brings new network management challenges. To this end, the impact of joint admission control strategies on quality of service is evaluated. The evaluation is performed on an advanced test platform that replicates an integrated Release 4 UMTS network and standard IEEE 802.11b network. The results show that when UMTS and WLAN are tightly coupled, the end user enjoys a higher level of quality of service.

scholarly journals A Hybrid Approach to Call Admission Control in 5G Networks

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Mohammed Al-Maitah ◽  
Olena O. Semenova ◽  
Andriy O. Semenov ◽  
Pavel I. Kulakov ◽  
Volodymyr Yu. Kucheruk
Keyword(s):  
Artificial Intelligence ◽  
Quality Of Service ◽  
Admission Control ◽  
Mobile Communications ◽  
Communication Systems ◽  
Call Admission Control ◽  
Hybrid Approach ◽  
5G Networks ◽  
Call Admission

Artificial intelligence is employed for solving complex scientific, technical, and practical problems. Such artificial intelligence techniques as neural networks, fuzzy systems, and genetic and evolutionary algorithms are widely used for communication systems management, optimization, and prediction. Artificial intelligence approach provides optimized results in a challenging task of call admission control, handover, routing, and traffic prediction in cellular networks. 5G mobile communications are designed as heterogeneous networks, whose important requirement is accommodating great numbers of users and the quality of service satisfaction. Call admission control plays a significant role in providing the desired quality of service. An effective call admission control algorithm is needed for optimizing the cellular network system. Many call admission control schemes have been proposed. The paper proposes a methodology for developing a genetic neurofuzzy controller for call admission in 5G networks. Performance of the proposed admission control is evaluated through computer simulation.

scholarly journals Evaluasi Kualitas Layanan Website Alumni Menggunakan Metode Webqual 4.0

2019 ◽  
Vol 5 (2) ◽  
pp. 105
Author(s):  
Anisa Yulandari ◽  
Wing Wahyu Winarno ◽  
Asro Nasiri
Keyword(s):  
Quality Of Service ◽  
User Satisfaction ◽  
Information Quality ◽  
Three Dimensions ◽  
Job Seekers ◽  
End User ◽  
Interaction Quality ◽  
Service Interaction

Website Portal Alumni Amikom Yogyakarta yang dapat diakses pada alamat domain alumni.amikom.ac.id merupakan bagian dari Universitas Amikom Yogyakarta yang berfungsi sebagai sarana berbagi informasi sekaligus bertindak sebagai penghubung antara perusahaan pencari tenaga kerja dan para pencari kerja khususnya alumni Universitas Amikom Yogyakarta. Selama ini website alumni sudah berjalan belum dilakukan evaluasi terhadap kualitas layanan website yang didasarkan pada persepsi pengguna akhir sebagai umpan balik kepada pengelola website sehingga pengelola dapat mengetahui sejauh mana kepuasan pengguna dan kualitas layanan yang sudah diberikan. Tujuan dari penelitian ini yaitu untuk mengetahui kualitas layanan website alumni menggunakan tiga dimensi yang ada pada metode Webqual 4.0. Tiga dimensi itu sendiri terdiri dari Kegunaan, Kualitas Informasi, dan Kualitas Interaksi Layanan. Pendistribusian kuisioner dilakukan terhadap 200 sampel responden. Kesimpulan dari penelitian ini adalah adanya pengaruh ketiga dimensi Webqual 4.0 terhadap kepuasan pengguna. Dimensi yang paling berpengaruh yaitu Kualitas Informasi dan Kualitas Interaksi Layanan. Hal ini berarti peningkatan dapat dilakukan pada indicator yang memiliki nilai rata-rata terendah. Peningkatan pada dimensi Kualitas Informasi dapat dilakukan perbaruan secara berkala sehingga informasi yang disajikan menjadi lebih relevan. Sedangkan untuk dimensi Kualitas Interaksi Layanan dapat dilakukan dengan meningkatkan pelayanan terhadap keluhan seputar website alumni.Kata Kunci — Kualitas Layanan, Website Alumni, Webqual 4.0The Alumni Amikom Yogyakarta Website which can be accessed at the domain address alumni.amikom.ac.id is part of the Amikom University of Yogyakarta which serves as a means of sharing information while acting as a liaison between the company and job seekers, especially alumni of Yogyakarta Amikom University. So far, the alumni website has been running, yet an evaluation of the quality of website services has been carried out based on the perception of the end user as feedback to the website manager so that the manager can find out how far the user satisfaction is and the quality of the service provided. The purpose of this study is to determine the quality of the alumni website service using three dimensions that exist in the method of Webqual 4.0, there are Usability, Information Quality, and Service Interaction Quality. The conclusion of this study is the influence of the three dimensions of Webqual 4.0 on user satisfaction. The most influential dimensions are Information Quality and Service Interaction Quality. This means that an increase can be made on an indicator that has the lowest average valueKeywords— Quality of Service, Alumni Website, Webqual 4.0

scholarly journals An Adaptive Bitrate Switching Algorithm for Speech Applications in Context of WebRTC

2021 ◽  
Vol 17 (4) ◽  
pp. 1-21
Author(s):  
Mohannad Alahmadi ◽  
Peter Pocta ◽  
Hugh Melvin
Keyword(s):  
Real Time ◽  
Data Exchange ◽  
Quality Of Experience ◽  
End User ◽  
High Quality ◽  
Content Type ◽  
Switching Algorithm ◽  
Wide Range ◽  
The Impact

Web Real-Time Communication (WebRTC) combines a set of standards and technologies to enable high-quality audio, video, and auxiliary data exchange in web browsers and mobile applications. It enables peer-to-peer multimedia sessions over IP networks without the need for additional plugins. The Opus codec, which is deployed as the default audio codec for speech and music streaming in WebRTC, supports a wide range of bitrates. This range of bitrates covers narrowband, wideband, and super-wideband up to fullband bandwidths. Users of IP-based telephony always demand high-quality audio. In addition to users’ expectation, their emotional state, content type, and many other psychological factors; network quality of service; and distortions introduced at the end terminals could determine their quality of experience. To measure the quality experienced by the end user for voice transmission service, the E-model standardized in the ITU-T Rec. G.107 (a narrowband version), ITU-T Rec. G.107.1 (a wideband version), and the most recent ITU-T Rec. G.107.2 extension for the super-wideband E-model can be used. In this work, we present a quality of experience model built on the E-model to measure the impact of coding and packet loss to assess the quality perceived by the end user in WebRTC speech applications. Based on the computed Mean Opinion Score, a real-time adaptive codec parameter switching mechanism is used to switch to the most optimum codec bitrate under the present network conditions. We present the evaluation results to show the effectiveness of the proposed approach when compared with the default codec configuration in WebRTC.

scholarly journals HOSPITALITY MANAGEMENT AS A PREREQUISITE OF EFFECTIVE TOURISM DEVELOPMENT IN UKRAINE

2021 ◽  
Author(s):  
Olena Khytra
Keyword(s):  
Quality Of Service ◽  
Corporate Culture ◽  
Management System ◽  
Hospitality Industry ◽  
Professional Competence ◽  
Tourism Industry ◽  
Hospitality Management ◽  
Social Orientation ◽  
The Impact

The hospitality industry acquires the features of an integrative industry, which combines material resources and intangible factors to meet the needs of modern man for comfortable travel and recreation. Hospitality is interpreted as a complex economic, social, cultural, psychological phenomenon, the impact of which on the development of the tourism industry determines the effect of synergy from the combination of tourist resources and quality of service. The author of article proposes to consider hospitality management as a multilevel dynamic management system for the process of providing services to tourists and vacationers, based primarily on the principles of humanism, tolerance, personalization of hospitality, respect for cultural diversity, priority to meet human needs for quality recreation and physical strength as well as cultural self-development. The social orientation of this system to some extent balances the commercial, purely pragmatic aspect of managing the development of tourism enterprises. A holistic model of hospitality management is based on a harmonious combination of four concepts. They are humanitarian, technological, functional and commercial. The system-forming component of the hospitality sector is a mechanism for managing consumer behaviour, which ensures an optimal balance of supply and demand in the market of hospitality services. The specifics of service in the hospitality industry is that the quality of service affects the emotional perception of tourists in the area and, accordingly, affects the image of the state. Therefore, the mechanism for implementing the service policy should be established through public administration measures. Among the key areas of hospitality management development is the formation of a rational organizational structure, improvement of hospitality marketing and support of corporate culture, the values of which are adequate to the socio-cultural environment of the hospitality industry. The specificity of the hospitality industry is also that an important role in ensuring competitiveness is played by an attractive brand, which stipulates the allocation in the management system of such a component as brand management. Considerable attention should be paid to the innovative development of hospitality enterprises and the constant improvement of professional competence of managers of socio-cultural activities.

scholarly journals Introducing a Mobility Access Category for IEEE 802.11e

2020 ◽  
Vol 9 (5) ◽  
pp. 1610-1614
Keyword(s):  
Quality Of Service ◽  
Wireless Network ◽  
Ieee 802.11E ◽  
Network Simulator ◽  
Mobile Nodes ◽  
Mobile Stations ◽  
Simulation Scenario ◽  
Simulation Results ◽  
The Impact

With traffic increase in a wireless network beyond its capacity and as the number of connected devices continue to grow, the quality of service (QoS) degrades. In this paper we study the impact of mobility on throughput in the case of an infrastructure wireless network using IEEE 802.11 Wi-Fi standard. Since we found in the literature that the mobility of stations can have an impact on the quality of service, we try to remedy to this by implementing a new access category reserved for mobile stations. First we compare the throughput between static and mobile nodes, both connected to a QoS station. Then we propose our new model that consists of adding a new access category used by mobile nodes regardless of their traffic category. The study was made by simulating different scenarios using Network Simulator-3 (NS-3). We found that the throughput may vary depending on the simulation scenario. The simulation results show that with the proposed solution the mobile nodes can have a better throughput.

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