Network performance and quality of experience of remote access laboratories

Kist, Alexander A. and Maxwell, Andrew D. (2012) Network performance and quality of experience of remote access laboratories. International Journal of Online Engineering , 8 (4). pp. 50-57. ISSN 1868-1646

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Remote Access Laboratories (RAL) have become important learning and teaching tools. This paper presents a performance study that targets a specific remote access architecture implemented within a universities operational environment. This particular RAL system provides globally authenticated and arbitrated remote access to virtualized computers as well as computer controlled hardware experiments. This paper presents system performance results that have been obtained utilizing both a set of automated and human subject tests. Principle objectives of the study were: To gain a better understanding of the nature of network traffic caused by experimental activity usage; to obtain an indication of user expectations of activity performance; and to develop a measure to predict Quality of Experience, based on easily measurable Quality of Service parameters. The study emulates network layer variation of access-bandwidth and round-trip-time of typical usage scenarios and contrasts against user perception results that allow classifying expected user performance. It demonstrates that failure rate is excellent measure of usability, and that round-trip-time predominantly affects user experience. Thin-client and remote desktop architectures are popular to separate the location of users and the actual data processing and use similar structures, hence results of this study to be applied in these application areas as well.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Articles in this journal are published under the Creative Commons Attribution License. iJET is an Open Access Journal. Readers don't have to pay any fee. Only registration is necessary.
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Electrical, Electronic and Computer Engineering
Date Deposited: 17 May 2013 00:30
Last Modified: 12 Feb 2015 01:05
Uncontrolled Keywords: remote access laboratory; performance evaluation; quality of experience
Fields of Research : 13 Education > 1303 Specialist Studies in Education > 130306 Educational Technology and Computing
10 Technology > 1005 Communications Technologies > 100503 Computer Communications Networks
13 Education > 1302 Curriculum and Pedagogy > 130212 Science, Technology and Engineering Curriculum and Pedagogy
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Identification Number or DOI: 10.3991/ijoe.v8i4.2276

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