Exploring the Role of Software Architecture in Dynamic and Fault Tolerant Pervasive Systems

Seo, Chiyoung; Malek, Sam; Edwards, George; Popescu, Dorin; Medvidović, Nenad; Petrus, Brad; Ravula, Sharmila

doi:10.1109/sepcase.2007.6

Cited by 13 publications

(11 citation statements)

References 14 publications

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“…Architecture plays a key role in pervasive fault tolerance systems [12]. With respect to wearable computing in healthcare, two common architectures are used which are explained as follows.…”

Section: Related Workmentioning

confidence: 99%

Toward a Fault Tolerant Architecture for Vital Medical-Based Wearable Computing

2015

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Advancements in computers and electronic technologies have led to the emergence of a new generation of efficient small intelligent systems. The products of such technologies might include Smartphones and wearable devices, which have attracted the attention of medical applications. These products are used less in critical medical applications because of their resource constraint and failure sensitivity. This is due to the fact that without safety considerations, small-integrated hardware will endanger patients' lives. Therefore, proposing some principals is required to construct wearable systems in healthcare so that the existing concerns are dealt with. Accordingly, this paper proposes an architecture for constructing wearable systems in critical medical applications. The proposed architecture is a three-tier one, supporting data flow from body sensors to cloud. The tiers of this architecture include wearable computers, mobile computing, and mobile cloud computing. One of the features of this architecture is its high possible fault tolerance due to the nature of its components. Moreover, the required protocols are presented to coordinate the components of this architecture. Finally, the reliability of this architecture is assessed by simulating the architecture and its components, and other aspects of the proposed architecture are discussed.

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Section: Related Workmentioning

confidence: 99%

Toward a Fault Tolerant Architecture for Vital Medical-Based Wearable Computing

2015

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“…In Fig. 4(e), 1,2 DA that has flag 1 is selected to system redeploy. The selected component is still DA are also pruned.…”

Section: A*_d Algorithmmentioning

confidence: 99%

“…Possible reasons include: increase in the speed and capacity of hardware, the emergence of wireless ad hoc networks, proliferation of sensors, and handheld computing devices, and so on. A number of researches have shown that a promising approach to resolve the challenges is to employ the principles of software architectures [1] . Software Architecture (SA) is a collection of models that capture software system principle design decisions in the form of components (location of 1 system computation and data management), connectors (location of component interaction), and configurations (specific arrangements of components and connectors intended to solve specific problems) [2] .…”

Section: Introductionmentioning

confidence: 99%

SA based software deployment reliability estimation considering component dependence

Liu

et al. 2011

J. Electron.(China)

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Reliability is one of the most critical properties of software system. System deployment architecture is the allocation of system software components on host nodes. Software Architecture (SA) based software deployment models help to analyze reliability of different deployments. Though many approaches for architecture-based reliability estimation exist, little work has incorporated the influence of system deployment and hardware resources into reliability estimation. There are many factors influencing system deployment. By translating the multi-dimension factors into degree matrix of component dependence, we provide the definition of component dependence and propose a method of calculating system reliability of deployments. Additionally, the parameters that influence the optimal deployment may change during system execution. The existing software deployment architecture may be ill-suited for the given environment, and the system needs to be redeployed to improve reliability. An approximate algorithm, A*_D, to increase system reliability is presented. When the number of components and host nodes is relative large, experimental results show that this algorithm can obtain better deployment than stochastic and greedy algorithms.

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“…Seo et al have argued that an effective way to ensure fault tolerance in complex software systems is to employ the principles of software architectures [20]. They also argue that the complexity of pervasive software systems creates challenges in maintaining the desired fault tolerance properties and that software architectures, in some way, can help create an abstraction barrier between the functional properties of a software system and the fault tolerance ensuring components.…”

Section: Fault and Adversary Tolerancementioning

confidence: 99%

Fault and adversary tolerance as an emergent property of distributed systems' software architectures

Brun

Medvidović

2007

Proceedings of the 2007 Workshop on Engineering Fault Tolerant Systems

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Fault and adversary tolerance have become not only desirable but required properties of software systems because mission-critical systems are commonly distributed on large networks of insecure nodes. In this paper, we describe how the tile style, an architectural style designed to distribute computation, can inject fault and adversary tolerance. The result is a notion of tolerance that is entirely abstracted away from the functional properties of the software system. The client may specify what fraction of the network is faulty or malicious (e.g., 25%) and the acceptable system failure rate (e.g., 2−10 ), and the system's architecture adjusts automatically to ensure a failure rate no higher than the one specified. The technique is entirely automated and consists of a "smart redundancy" mechanism that brings the failure rate exponentially close to 0 by slowing down the execution speed linearly.

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Exploring the Role of Software Architecture in Dynamic and Fault Tolerant Pervasive Systems

Cited by 13 publications

References 14 publications

Toward a Fault Tolerant Architecture for Vital Medical-Based Wearable Computing

Toward a Fault Tolerant Architecture for Vital Medical-Based Wearable Computing

SA based software deployment reliability estimation considering component dependence

Fault and adversary tolerance as an emergent property of distributed systems' software architectures

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