Thesis (M.S. in Computer Science)--Naval Postgraduate School, December 2002. / Thesis advisor(s): Geoffrey Xie, Burt Lundy. Includes bibliographical references (p. 91-95). Also available online.

Thesis (Ph.D.) - Carleton University, 2007. / Includes bibliographical references (p. 194-2007). Also available in electronic format on the Internet.

Thesis (M. Eng.)--Carleton University, 2001. / Includes bibliographical references (p. 111-113). Also available in electronic format on the Internet.

Thesis (M.S.)--Villanova University, 2007. / Computer Science Dept. Includes bibliographical references.

Magister Scientiae - MSc / Location-based service (LBS) is a geographical location-related service that provides highly personalized services for users. It is a platform for network operators to provide new and innovative ways of increasing profits from new services. With the rapidly growing trend toward LBS, there is a need for standard LBS protocols. This thesis started with introducing the Internet Engineering Task Force GEOPRIV working group, which endeavors to provide standard LBS protocols capable of transferring geographic location information for diverse location-aware applications. Through careful observation, it was found that Session Initiation Protocol (SIP) is well suited to the GEOPRIV requirements. The aim of this research was therefore to explore the possibility of the integration of LBS and the SIP protocol and, to some extent fulfill the GEOPRIV requirements. / South Africa

Orientador: Heloisa Vieira da Rocha / Dissertação (mestrado profissional) - Universidade Estadual de Campinas, Instituto de Computação / Made available in DSpace on 2018-08-06T23:50:55Z (GMT). No. of bitstreams: 1 Nemer_AmarilisCanhada_M.pdf: 3000977 bytes, checksum: 07495bf3e42cd276238a03af7c80c133 (MD5) Previous issue date: 2006 / Resumo: Está havendo uma rápida convergência de tecnologias no que diz respeito ao telefone móvel. A primeira geração de dispositivos móveis foi desenvolvida para satisfazer a mesma necessidade do usuário das linhas telefones fixos: fazer e receber chamadas. Um aumento do número das funções tem ocorrido, tais como mensagem texto/voz/multimídia, conexão Internet, tocador de música, filmadora, câmera, agenda, Bluetooth; se estendendo a uma infinidade de funcionalidades nunca antes imaginadas a esses pequenos dispositivos que estão evoluindo na direção dos telefones inteligentes. Este estudo objetiva analisar a usabilidade tomando como ponto de partida convergência de tecnologias, a multiplicidade de aplicações existentes para telefones celulares e a abrangência em termos de usuários. Buscamos obter respostas sobre alguns problemas que estão se impondo ao usuário a partir dessa convergência, como a complexidade dos dispositivos; a atual dificuldade das funcionalidades existentes e novas em relação à usabilidade / Abstract: lt is happening a fast convergence of technologies regarding mobile phones. The first mobile phone generation was developed to satisfy the users to make and receive calls similarly to fixed phones. However, new functionalities such as messaging, multimedia, internet connection, sound player, video, camera, Bluetooth are being added into these devices, which are becoming smart phones. This study aims to contribute to analysis of the mobile phones usability, considering the convergence of technologies, the variety of functionalities into mobile phones and the vast number of different users. lt aims to reach answers regarding complexity, difficulties in handling existing and new functionalities of the mobile phones / Mestrado / Engenharia de Computação / Mestre em Ciência da Computação

The point of this project is to cover a gap in today’s supply of provisioning systems for VoIP endpoint devices. Today the norm is that every manufacturer of endpoints builds their own system to provision their endpoints, but most operators use a vast verity of products to meet their customers’ needs. This system is based on open source software to allow adaptations to different environments and demands from customers and to require no license fee thus being affordable to the small size and midsized operators. This thesis is mainly an engineering type of thesis and the main bulk of the work has been put in developing the solution.

The thesis investigates the possibility to enrich standard mobile phone calls with cooperative web applications. Originating from the research field know as Computer Supported Cooperative Work (CSCW) this thesis report introduces and describes the implementation of several applications which can be used by the calling parties together during a phone call. Additionally, the report describes a proof-of-concept prototype for the Android platform, and discusses the performance of cooperative web application running on mobile devices in terms of network and CPU use. The conclusions of the thesis describe a prototype application addressing and implementing the requirements as described by the theory of computer supported collaborated work. The performance of the running application showed to be satisfactory, both regarding to network demand and processor use.

Internet telephony has had a tremendous impact on how people communicate. Many now maintain contact using some form of Internet telephony. Therefore the motivation for this work has been to address the quality aspects of real-world Internet telephony for both fixed and wireless telecommunication. The focus has been on the quality aspects of voice communication, since poor quality leads often to user dissatisfaction. The scope of the work has been broad in order to address the main factors within IP-based voice communication. The first four chapters of this dissertation constitute the background material. The first chapter outlines where Internet telephony is deployed today. It also motivates the topics and techniques used in this research. The second chapter provides the background on Internet telephony including signalling, speech coding and voice Internetworking. The third chapter focuses solely on quality measures for packetised voice systems and finally the fourth chapter is devoted to the history of voice research. The appendix of this dissertation constitutes the research contributions. It includes an examination of the access network, focusing on how calls are multiplexed in wired and wireless systems. Subsequently in the wireless case, we consider how to handover calls from 802.11 networks to the cellular infrastructure. We then consider the Internet backbone where most of our work is devoted to measurements specifically for Internet telephony. The applications of these measurements have been estimating telephony arrival processes, measuring call quality, and quantifying the trend in Internet telephony quality over several years. We also consider the end systems, since they are responsible for reconstructing a voice stream given loss and delay constraints. Finally we estimate voice quality using the ITU proposal PESQ and the packet loss process. The main contribution of this work is a systematic examination of Internet telephony. We describe several methods to enable adaptable solutions for maintaining consistent voice quality. We have also found that relatively small technical changes can lead to substantial user quality improvements. A second contribution of this work is a suite of software tools designed to ascertain voice quality in IP networks. Some of these tools are in use within commercial systems today. / <p>Also identified as KTH publication TRITA-EE 2009:025</p> / Real-time router / Vinnova SIBED

The aim of this Masters Thesis is to propose to SYSteam Nät AB, a local Internet Service Provider (ISP) in Uppsala, Sweden, how to implement IP telephony in their existing ITinfrastructure as a service to their customers. Thus the perspective of the thesis will be that of a local Internet Service Provider. Three general areas are covered in the thesis: Market and Business Model, Technology, and Economics. Important issues for SYSteam Nät AB as an established local broadband Internet Service Provider are to both retain present customers and to attract new customers. Some believe that offering value added services such as IP telephony could do this. Implementation of IP telephony can be done in different ways to fulfil SYSteam Nät’s requirements. The analysis leads to a proposal of how SYSteam Nät could implement IP telephony. This involves many multi-faceted business, technical, and financial issues; each aspect is examined in this thesis. / Avsikten med detta examensarbete är att komma med ett förslag till SYSteam Nät AB, en lokal Internetleverantör i Uppsala, om hur de, som en service till sina kunder, kan implementera IP telefoni i sin existerande IT-infrastruktur. Detta betyder att jag behandlar frågeställningen med en Internetleverantörs perspektiv.Tre huvudområden behandlas i examensarbetet: Marknad och Affärsmodell, Teknik och Ekonomi. Som en etablerad lokal leverantör av Internet via bredband är det viktigt för SYSteam Nät AB att både behålla nuvarande kunder och att attrahera nya kunder. En del tror att man skulle kunna åstadkomma detta genom att erbjuda värdehöjande tjänster som IP telefoni. Implementering av IP telefoni, som svarar mot SYSteam Näts krav, kan utföras på olika sätt. Analysen, som leder till ett förslag hur SYSteam Nät skulle kunna implementera IP telefoni, involverar många mångfasetterade frågeställningar av affärs-, teknisk- och ekonomisk natur. Var och en av dessa aspekter behandlas i rapporten.