VoIP Availability and Service Reliability through Software Rejuvenation Policies

Koutras, Vasilis P.; Platis, Agapios Ν.

doi:10.1109/depcos-relcomex.2007.54

Cited by 11 publications

(5 citation statements)

References 9 publications

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“…Although the software is debugged and tested before deployment, unpredicted errors also occurs at runtime due to the software aging, unnoticed faults and etc [1,2]. Software rejuvenation, involving releasing unused memories, restarting the software, or rebooting the operating system, has been considered as the main solution to avoid severe or aging-related failures [3].After rejuvenation, the software is generally reset to the initial working state. But the whole process interrupts the normal software operation and introduces performance overhead.…”

Section: Introductionmentioning

confidence: 99%

An Adaptive Reconfiguration Mechanism for Periodic Software Rejuvenation based on Transient Reliability Analysis

Liu

Yuan

2018

MATEC Web Conf.

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While software rejuvenation is used to prevent severe software failures, existing researches generally choose the constant-value periodic policy through steady-state reliability optimization. Since the software reliability declines with the execution time, a steady policy either introduces extra overhead or could not guarantee the reliability constraints. So an adaptive mechanism is proposed to reconfigure the software rejuvenation in the runtime. The transient reliability analysis is used to choose an optimal rejuvenation policy which maintains the software reliability for a certain period of time. A dynamic time series is generated for the reconfiguration process and the optimal rejuvenation policy is re-calculated according to the reconfiguration intervals during the software execution. Experimental studies results show that as the execution time increases, the software reliability drops continuously and the optimal rejuvenation interval should be decreased to maintain the same reliability constraints. This mechanism guarantees the software reliability constraint by resetting the optimal rejuvenation policy dynamically according to a reconfiguration interval time series.

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Section: Introductionmentioning

confidence: 99%

An Adaptive Reconfiguration Mechanism for Periodic Software Rejuvenation based on Transient Reliability Analysis

Liu

Yuan

2018

MATEC Web Conf.

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“…Moreover, the recent advancements on hardware and software aspire to cut down the cost of their phone calls. It is very much evident that this technology has been budding relatively fast in the field of telecommunication in last few years (Karapantazis and Pavlidou, 2009;Koutras and Platis, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…Due to growing number of calls in a VoIP system, resource exhaustion may occur which can result in system failure. In Koutras and Platis (2007), the consequences of implementing software rejuvenation with the purpose of averting such failures in a VoIP system are checked. In Koutras et al (2009), the authors modeled a VoIP system with essential components by means of a Markov chain, and utilized redundancies at component level and software rejuvenation to attain improved reliability and availability.…”

Section: Introductionmentioning

confidence: 99%

An Optimal Rejuvenation Strategy for Increasing Service Reliability of a VOIP System with Multiple Components

Gupta¹,

Kumar²

2017

Int J Math, Eng, Manag Sci

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In this day and age Voice over Internet Protocol (VoIP) has turned out to be a revolutionary technology in the field of telecommunication. Because of the escalating number of users of VoIP, it is essential to intend for a reliable VoIP system providing good quality of service. In this paper a stochastic model based on continuous time Markov chain is developed to analyze the reliability of a server based VoIP system comprising of significant components only. The concurrent breakdown of more than one component is taken into modeling concern. Redundancy at the component level is used with the purpose to boost the system reliability of VoIP. As a defensive course of action, software rejuvenation is implemented to avert or suspend software failures. And an optimal software rejuvenation strategy is proposed which leads to increased system reliability. Numerical results are presented for the quantitative examination of the suggested model.

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“…Research has been done on the area of availability and reliability of VoIP systems. A VoIP system is considered in (Koutras and Platis, 2007) and the effects of performing software rejuvenation in order to prevent system failures caused by resource exhaustion due to the increasing number of calls are examined. An optimal rejuvenation policy to increase the system reliability in the presence of resource degradation is proposed by Koutras and Platis (2006).…”

Section: Introductionmentioning

confidence: 99%

Reliability and performance modelling of VoIP system with multiple component failures

Gupta

Selvamuthu

2013

IJRS

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Nowadays Voice over IP (VoIP) has become an evolutionary technology in telecommunications. Because of the increasing dependencies of people on VoIP for voice communication, it is important to design a reliable and performance oriented VoIP system. In this paper a hierarchical model combining reliability and performance is proposed for a server based VoIP system on a wireless network. The top level reliability model consists of only the basic components of a VoIP system. Simultaneous failure of multiple components is taken into modelling consideration. Component redundancies and software rejuvenation are employed to achieve higher system reliability. Assuming exponential failure and repair times of the components, continuous time Markov chain is used to develop the top level reliability model. In addition, a lower level performance model is constructed to obtain the performance metrics of the system at each state of the top level reliability model. Numerical results are provided for the quantitative analysis of the proposed model.Reference to this paper should be made as follows: Gupta, V. and Dharmaraja, S. (2013) 'Reliability and performance modelling of VoIP system with multiple component failures', Int.

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VoIP Availability and Service Reliability through Software Rejuvenation Policies

Cited by 11 publications

References 9 publications

An Adaptive Reconfiguration Mechanism for Periodic Software Rejuvenation based on Transient Reliability Analysis

An Adaptive Reconfiguration Mechanism for Periodic Software Rejuvenation based on Transient Reliability Analysis

An Optimal Rejuvenation Strategy for Increasing Service Reliability of a VOIP System with Multiple Components

Reliability and performance modelling of VoIP system with multiple component failures

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