Quality assessment and usage behavior of a mobile voice-over-IP service

Abstract

Voice-over-IP (VoIP) services offer users a cheap alternative to the traditional mobile operators to make voice calls. Due to the increased capabilities and connectivity of mobile devices, these VoIP services are becoming increasingly popular on the mobile platform. Understanding the user's usage behavior and quality assessment of the VoIP service plays a key role in optimizing the Quality of Experience (QoE) and making the service to succeed or to fail.By analyzing the usage and quality assessments of a commercial VoIP service, this paper identifies device characteristics, context parameters, and user aspects that influence the usage behavior and experience during VoIP calls. Whereas multimedia services are traditionally evaluated by monitoring usage and quality for a limited number of test subjects and during a limited evaluation period, this study analyzes the service usage and quality assessments of more than thousand users over a period of 120 days. This allows to analyze evolutions in the usage behavior and perceived quality over time, which has not been done up to now for a widelyused, mobile, multimedia service. The results show a significant evolution over time of the number of calls, the call duration, and the quality assessment. The time of the call, the used network, and handovers during the call showed to have a significant influence on the users' quality assessments.Keywords usage behavior · user experience · voiceover-ip · mobile · quality assessment 1 Introduction

Modular and deep QoE/QoS mapping for multimedia services over satellite networks

“…Upadhyaya et al proposed a crawling‐based solution to obtain user perception about web service and found the strong positive correlation between QoS and QoE. For VoIP service over mobile networks, De Pessemier et al found that the used network and handovers occurred during the voice call have a significant impact on user QoE. We can see that these models severely depend on service identification in practice and the whole system needs to be retrained to match newly emerging services.…”

“…Bayesian network, artificial neural network, and support vector machines have been exploited to predict QoE for different kinds of multimedia services in different types of networks. By far most studies only focus on one particular service, such as streaming video, voice over internet protocol (VoIP), or web service, and depend on the accuracy of traffic classification in practical system. In addition, the correlation models between QoS parameters and user QoE have been established for internet of thing (IoT) networks, mobile networks, and cellular networks, but the research on satellite networks receives little attention.…”

Grátis não é o suficiente: estudo da adoção individual da telefonia pela internet

“…Adiciona-se que os sistemas VoIP podem proporcionar maior mobilidade dos usuários, além de flexibilizar e diversificar os meios de comunicação interpessoal: alguns sistemas VoIP conseguem estabelecer conferências telefônicas, videochamadas, gravação de recados, entre outros recursos. A inclusão de funcionalidades aos sistemas VoIP é um aspecto que pode favorecer a adoção dessas tecnologias entre os usuários desses sistemas (TOBIN; BIDOLI, 2006): a gama de funcionalidades contidas no sistema VoIP pode proporcionar diversos métodos de transmissão de informações aos destinatários por meio do envio de mensagens instantâneas, imagens ou arquivos (PESSEMIER et al, 2016).…”

“…Pressupõe-se que a escolha da tecnologia que fornece maior conforto ao uso da TI perpassa pelo livre acesso dos recursos computacionais a fim de permitir o uso a qualquer momento ou local (PESSEMIER et al, 2016). Dessa forma, a percepção de conveniência sobre o uso da tecnologia pode promover uma valorização positiva da utilidade percebida da TI ao usuário (KIM et al, 2008;KIM, 2009) e influenciar o hábito de uso da aplicação.…”

“…Entre diversas formas de comunicação digital, a tecnologia de Voz sobre Protocolo de Internet -VoIP -oferece benefícios multifacetados, pela possibilidade de suportar a comunicação por voz sem custo tarifário, além de métodos variados de troca de informações entre destinatários, por exemplo as mensagens instantâneas, imagens ou arquivos (PESSEMIER et al, 2016).…”