Electrical and Electronic Engineering - Research Publications
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ItemModeling the Total Energy Consumption of Mobile Network Services and Applications(MDPI, 2019-01-07)Reducing the energy consumption of Internet services requires knowledge about the specific traffic and energy consumption characteristics, as well as the associated end-to-end topology and the energy consumption of each network segment. Here, we propose a shift from segment-specific to service-specific end-to-end energy-efficiency modeling to align engineering with activity-based accounting principles. We use the model to assess a range of the most popular instant messaging and video play applications to emerging augmented reality and virtual reality applications. We demonstrate how measurements can be conducted and used in service-specific end-to-end energy consumption assessments. Since the energy consumption is dependent on user behavior, we then conduct a sensitivity analysis on different usage patterns and identify the root causes of service-specific energy consumption. Our main findings show that smartphones are the main energy consumers for web browsing and instant messaging applications, whereas the LTE wireless network is the main consumer for heavy data applications such as video play, video chat and virtual reality applications. By using small cell offloading and mobile edge caching, our results show that the energy consumption of popular and emerging applications could potentially be reduced by over 80%.
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ItemData storage energy efficiency in the zettabyte era(Telecommunications Association, 2014-10)Data storage has become an increasingly significant issue with the widespread availability of cheap storage technology and the development of global data centres for cloud storage. This paper reports a study of energy consumption for data storage in data centres. Unlike previous estimates, which have been extrapolations of broad energy usage within the data centre, we take a bottom-up approach. Firstly, we describe the technologies that can be used for data storage. Then we build up a model of energy consumption in data centres based on tiers of data storage. Based on published forecasts of data storage growth and assumptions about improving energy efficiency in technology and data centres, we then estimate the energy consumption for data storage in data centres in 2020. We show that energy consumption will rise substantially if a “business as usual” approach is adopted. We further show that the growth in energy consumption can be mitigated somewhat by adopting a more aggressive policy of data archiving on long-term, low-energy, “cold” storage; or more ideally purging data of little or no future value. This, however, would require a change in the popular assumption that data will be available readily online and forever.
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ItemConvergence in action: the founding of the computer society of South Australia(Telecommunications Association, 2014-06)This article describes the key events leading up to the formation in 1960 of the Computer Society of South Australia, the first State-based computer society in Australia. It proposes that an understanding of the convergence of requirements (between administration, academia, industry and to some extent the military) was important in identifying the opportunity and bringing the main contributors together. It suggests that such an approach may be useful in similar circumstances today. The key role played by Professor Ren Potts of the University of Adelaide is emphasised. Some of Professor Potts’s other activities of relevance to telecommunications are outlined.