MobileTI

Wu, Weifeng; Rivas, Raoul; Arefin, Ahsan; Shi, Shu; Sheppard, Renata M.; Bui, B.D.; Nahrstedt, Klara

doi:10.1145/1631272.1631437

Cited by 12 publications

(3 citation statements)

References 10 publications

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“…The TAM model argues that perceived usefulness is directly related to the user's intention of use. It is the main factor that induces a user to adopt a given system to perform a desired task . Moreover, the model suggests that ease of use is a factor that can contribute to the system utilization by a user; however, the decisive factor is the level of utility (or usefulness) perceived.…”

Section: Proposed Modelmentioning

confidence: 99%

A QoC‐based model for performance and QoE trade‐off in distributed systems

D'Amato

Dantas

2017

Concurrency and Computation

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Summary This paper proposes a quality of context (QoC)–based model to enhance trade‐off between system performance and users quality of experience (QoE) in distributed systems. The QoE considers the users subjective perceptions of quality on technology services and depends on context attributes related to the users expectations. In addition, context information can be used to improve performance in context‐aware systems. Therefore, the QoC‐based model proposed in this paper aims to establish performance and QoE trade‐off for resource allocation in distributed systems. With the massive data growth over the past years, the demand for computing capacity has been notably growing in a proportional way. In view of that, the demand for distributed systems has also increased significantly due to the advantages of distributed computing such as cost‐benefit gains, large processing capacity, and an extensive capability for resources sharing. In this sense, the large‐scale utilization of distributed systems has generated problems concerning resource allocation because of the heterogeneous characteristics and continuous evolution of distributed computational devices, resulting in several challenges in terms of environment performance and users' satisfaction trade‐off. The model conceived in this paper provides for an experimental evaluation considering performance and QoE trade‐off by means of simulations. Simulations were performed in order to study complex distributed systems scenarios. Experimental results showed that the proposed QoC model policy has an enhanced performance in comparison with classical approaches.

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Section: Proposed Modelmentioning

confidence: 99%

A QoC‐based model for performance and QoE trade‐off in distributed systems

D'Amato

Dantas

2017

Concurrency and Computation

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“…System-level solutions to maximize operational time have already been proposed in the literature [3] [4][5] [6]. However, despite the fact that degradations of perceived multimedia quality prevent technology user adoption [7], this performance parameter has usually been discarded as an optimization goal.…”

Section: Introductionmentioning

confidence: 99%

Energy consumption estimation of an OMAP-based Android operating system

González

Juárez

Castro

et al. 2011

VLSI Circuits and Systems V

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System-level energy optimization of battery-powered multimedia embedded systems has recently become a design goal. The poor operational time of multimedia terminals makes computationally demanding applications impractical in real scenarios. For instance, the so-called smart-phones are currently unable to remain in operation longer than several hours.The OMAP3530 processor basically consists of two processing cores, a General Purpose Processor (GPP) and a Digital Signal Processor (DSP). The former, an ARM Cortex-A8 processor, is aimed to run a generic Operating System (OS) while the latter, a DSP core based on the C64x+, has architecture optimized for video processing.The BeagleBoard, a commercial prototyping board based on the OMAP processor, has been used to test the Android Operating System and measure its performance. The board has 128 MB of SDRAM external memory, 256 MB of Flash external memory and several interfaces. Note that the clock frequency of the ARM and DSP OMAP cores is 600 MHz and 430 MHz, respectively. This paper describes the energy consumption estimation of the processes and multimedia applications of an Android v1.6 (Donut) OS on the OMAP3530-Based BeagleBoard. In addition, tools to communicate the two processing cores have been employed. A test-bench to profile the OS resource usage has been developed.As far as the energy estimates concern, the OMAP processor energy consumption model provided by the manufacturer has been used. The model is basically divided in two energy components. The former, the baseline core energy, describes the energy consumption that is independent of any chip activity. The latter, the module active energy, describes the energy consumed by the active modules depending on resource usage.

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“…Some systems offer a free viewpoint on the observed user, enabling only the visual presence of the user [9]. Other systems compute a partial 3D model based on a depth map [10,6,3,13]. It provides a partial visual and geometrical presence (thickness of modeled objects is unknown for instance).…”

Section: Introductionmentioning

confidence: 99%

A 3d data intensive tele-immersive grid

Petit

Dupeux

Bossavit

et al. 2010

Proceedings of the 18th ACM International Conference on Multimedia

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Networked virtual environments like Second Life enable distant people to meet for leisure as well as work. But users are represented through avatars controlled by keyboards and mouses, leading to a low sense of presence especially regarding body language. Multi-camera real-time 3D modeling offers a way to ensure a significantly higher sense of presence. But producing quality geometries, well textured, and to enable distant user tele-presence in non trivial virtual environments is still a challenge today.In this paper we present a tele-immersive system based on multi-camera 3D modeling. Users from distant sites are immersed in a rich virtual environment served by a parallel terrain rendering engine. Distant users, present through their 3D model, can perform some local interactions while having a strong visual presence. We experimented our system between three large cities a few hundreds kilometers apart from each other. This work demonstrate the feasibility of a rich 3D multimedia environment ensuring users a strong sense of presence.

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MobileTI

Cited by 12 publications

References 10 publications

A QoC‐based model for performance and QoE trade‐off in distributed systems

A QoC‐based model for performance and QoE trade‐off in distributed systems

Energy consumption estimation of an OMAP-based Android operating system

A 3d data intensive tele-immersive grid

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