Voice over IP - Considerations for a Next Generation Architecture

Hillenbrand, M.; Götze, Joachim; Müller, Paul

doi:10.1109/euromicro.2005.66

Cited by 13 publications

(6 citation statements)

References 14 publications

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“…Skype, MSN, Google Talk and Yahoo Messenger are examples of popular programmes with VoIM capabilities, allowing users to send instantaneous text and voice messages over the internet. VoIM offers new unique benefits (Hillenbrand, Götze & Müller, 2005) by combining the benefits of Voice over Internet Protocol (cost savings, flexibility, ease of installation, ability to record conversations and multiple connections) with the benefits of instant messaging (private messaging, text‐based format and asynchronous capabilities). However, the effectiveness and impact on training for oral proficiency have not been sufficiently documented for this technology.…”

Section: Introductionmentioning

confidence: 99%

Voice over instant messaging as a tool for enhancing the oral proficiency and motivation of English‐as‐a‐foreign‐language learners

Yang

Gamble

Tang

2011

Brit J Educational Tech

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The challenge of providing authentic experiences and interactions for fostering oral proficiency and motivation in foreign languages is an opportunity for innovation in educational technology and instructional design. Although several recent innovations have received the attention of scholars, empirical investigation and validation is often lacking, as is the case with voice over instant messaging (VoIM). The goal of this study was to empirically test the effectiveness of VoIM for enhancing students' oral English proficiency and learning motivation. Different types of online discussions were examined-unstructured, structured without the facilitation of English teaching assistants (ETAs) and structured with the facilitation of ETAs. A pre-test and post-test quasiexperimental design was employed to achieve this goal. The participants, 90 students enrolled in three sections of a freshman English course at a large university in Asia, participated in eight VoIM discussions in addition to their regular coursework. The results provide empirical support for the importance of structured discussions and the facilitation of ETAs in improving both oral English proficiency and learning motivation. These findings highlight the role of facilitation in VoIM discussions, and recommend prompt feedback, modelling and encouragement for fostering oral proficiency and learning motivation in foreign language classes. Based on the results of this study, recommendations for future research are provided. Practitioner NotesWhat is already known about this topic • Authentic language experiences are crucial for fostering oral proficiency and motivation in English language learning. • Computer-mediated communication (CMC), in both synchronous and asynchronous forms, offer opportunities for learners to enhance their English reading, writing, listening and speaking skills in an environment that overcomes the limits of distance.• Social constructivism offers language educators many useful strategies for fostering language proficiency and student motivation, including peer collaboration, scaffolding of learning activities, and peer and instructor facilitation.What this paper adds• This paper examines a relatively new technology, Voice over Instant Messaging (VoIM), as an instructional tool for fostering oral proficiency (one of the most difficult areas of language acquisition) and student motivation (which is critical for all areas of language learning). • The data demonstrates that with the facilitation of English teaching assistants, structured online discussions were successful in fostering student oral proficiency and English learning motivation (as compared with structured online discussions with peer facilitation or unstructured online discussions), contributing to the growing body of literature on the use of technology to enhance English language learning. • The quasi-experimental design adopted for this research is particularly robust, especially in terms of the internal validity of the findings, providing clear and substantiated insights...

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Section: Introductionmentioning

confidence: 99%

Voice over instant messaging as a tool for enhancing the oral proficiency and motivation of English‐as‐a‐foreign‐language learners

Yang

Gamble

Tang

2011

Brit J Educational Tech

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“…The forward is done via the Notification Service (indicated by the dotted line), as there is no possibility for Client Manager B to directly send messages to Client B. Client B decides to take the call and submits an accept(6) message, which is propagated (7,8) Figure 4: Transformation from Automaton to BPEL method, both clients submit their current IP-address and in turn receive the IP-address of their communication partner (sendIP will block until the IP-address of the partner is received).…”

Section: Methodsmentioning

confidence: 99%

“…The Venice [7] project proposes a Web services based framework for VoIP applications. By using a service oriented architecture, the authors aim at easing the integration of supplementary services, the compatibility between different signaling layer protocols for call control and the installation of software updates on client devices.…”

Section: Related Workmentioning

confidence: 99%

WS-AMUSE - web service architecture for multimedia services

Scholz

Buckl

Kemper

et al. 2008

Proceedings of the 13th International Conference on Software Engineering - ICSE '08

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Recently, a move from traditional, network specific multimedia services to IP-based solutions could be observed. Although many of these applications have similar requirements and address the same issues, individual solutions based on specialized protocols are commonly used. This specialization prohibits the extraction and reuse of common services and hinders the interoperability between services and the integration with external components.A promising approach to overcome these disadvantages is the adoption of the service-oriented paradigm in communication protocols and a modularization into cooperating services. In this paper, we present a generic framework for multimedia applications consisting of a set of reusable Web service components, a modeling language based on finite state automata and a compiler. The results of a BPEL based prototypical implementation of a Voice-over-IP application show that the service oriented approach and the automaton based modeling language can satisfy the above mentioned criteria and ease application development through a higher level of abstraction. On the other hand our benchmarks indicate that current Web service technologies can lead to an insufficient performance, depending on the application scenario. Possible solutions to circumvent these deficiencies are presented at the end of the paper.

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“…This section provides an overview of this approach and the resulting architectural design. Details and related work will not be discussed in detail, they have been published previously and can be gleaned in [7,8,9,10,11,12]. Basically, the benefits of the architecture compared to existing H.323 or SIP-based solutions or products like Skype [13] are the open and service-oriented approach and the migration from client code into distributed services.…”

Section: Venice Architecturementioning

confidence: 99%

Web Services Directory Based on Peer-to-Peer Technology

Götze

Hillenbrand

Müller

32nd EUROMICRO Conference on Software Engineering and Advanced Applications (EUROMICRO'06)

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Service-oriented architectures foster the interaction of a multitude of different services. In order to ensure flawless service interaction a directory service is needed that can be used to find suitable services for a desired task. A centralized solution for local services might be suitable for small systems, but on a larger scale -when systems start to interact via Federations of Trust -the need for an highly available and easily maintainable directory service arises.

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Voice over IP - Considerations for a Next Generation Architecture

Abstract: Abstract

Cited by 13 publications

References 14 publications

Voice over instant messaging as a tool for enhancing the oral proficiency and motivation of English‐as‐a‐foreign‐language learners

Voice over instant messaging as a tool for enhancing the oral proficiency and motivation of English‐as‐a‐foreign‐language learners

WS-AMUSE - web service architecture for multimedia services

Web Services Directory Based on Peer-to-Peer Technology

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