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This research provides a concise answer to how to organize a strong infrastructure of information technologies for high availability based on open source software, it's necessary for large organizations to provide high availability, the work will focus on explaining the procedures to provide services for users 24 hours the 365 days. Centralization is a major weakness today because is the only source...
Various players in the field of energy give a lot of importance to the evaluation of reliability of their electrical networks. Following our literature review, several limitations need to be pointed out. In this paper, we will present an accurate method of decision making based on constraint programming. Our main contributions are i) to propose a new generalized constraint based formalization of the...
Aiming at the problem of reliability redundancy design algorithm, this paper presents an adaptive particle swarm optimization algorithm with foraging behavior. In this method, the bacterial foraging process is introduced into the adaptive particle swarm optimization algorithm, which can give the function of particle movement and turning, improve the ability of local search and avoid premature behavior...
Scaling the CMOS devices deep into the nanorange reduces their reliability margins significantly. Consequently, accurately calculating the reliability of digital nanocircuits is becoming a necessity for investigating design alternatives to optimize the trade-offs between area-power-delay and reliability. However, accurate reliability calculation of large and highly connected circuits is complex and...
With ever-decreasing CMOS transistor sizes, integrated circuits are becoming more and more susceptible to errors. A commonly used approach to improve the reliability of digital circuits is triple modular redundancy (TMR). TMR instantiates three copies of a circuit plus additional voter circuits to take majority decisions on the output values. Prior research has studied variations in TMR voting structures...
Error correction code (ECC) and built-in self-repair (BISR) schemes have been wildly used for improving the yield and reliability of memories. Many built-in redundancy-analysis (BIRA) algorithms and ECC schemes have been reported before. However, most of them focus on either BIRA algorithms or ECC schemes. In this paper, we propose an ECC-Enhanced Memory Repair (EEMR) scheme for yield improvement...
The aggressive advent in VLSI manufacturing technology has made dramatic impacts on the dependability of devices and interconnects. In the modern manycore system, mesh based Networks-on-Chip (NoC) is widely adopted as on chip communication infrastructure. It is critical to provide an effective fault tolerance scheme on mesh based NoC. A faulty router or broken link isolates a well functional processing...
Triple modular redundancy (TMR) is a well-known technique for building fault-tolerant systems. In TMR, a module unit is triplicated, and the outputs of these three units are compared by a voter. In this paper we consider systems that consist of multiple TMR units in series. Only recently has it been found that even such simple systems can be configured into various structures. We propose (i) a method...
In this work we design retransmission schemes for broadcast networks which use simple network coding techniques. In particular we consider a wireless system with a shared feedback channel, wherein the number of transmission errors can be estimated by polling or voice-vote mechanisms. As a result, the feedback bandwidth is independent of the users in the system. We then develop analytical models to...
In energy constrained wireless sensor networks, it is important that a routing protocol provides network redundancy and reliability at a minimum energy consumption cost. To satisfy these conflicting constraints, wireless sensor networks (WSN) routing protocols generally employ a clustering algorithm in which the entire network does not have to be active at all times. In this paper, we propose a novel...
The system reliability which applies redundant style of reservoir is studied aiming at the fuzziness of reliability parameter. Firstly, fuzzy chance constrained model of redundant system reliability optimization is given. Then the solution strategy of ant colonies algorithm with fuzzy simulated is studied, and the detailed steps of hybrid intelligent algorithm is given. At last, an instance is given,...
With reducing feature size of transistors and increasing number of cores on a single chip, fault tolerance and reliability have become two significant challenges for IC designers. Since chip design is extremely cost-sensitive, the fault tolerance redundancy must be provided at a reasonable cost. In this paper, a fault tolerant NoC architecture with cores linked to two switches instead of one, is proposed...
Dependability is a broad concept which covers such aspects of computer systems like reliability, maintainability, and availability. Also because of this broadness, researches came up with related yet more focused notions such as self-healing and robustness. In this article, I discuss robustness in relation to dependability and make a distinction between these two. I outline the state of the art of...
For the parameters of product reliability design are uncertain, based on the Liu's fuzzy chance constrained theory, provides a fuzzy chance constrained programming module of product reliability design that has N sub-systems and several designs can be chosen in every sub-system. The detailed processes of genetic algorithm and ant colonies algorithm are given respectively, checking fuzzy simulation...
To improve the efficiency of reliable broadcast/multicast MAC protocol in wireless multi-hop network, a location aid algorithm to eliminate redundant nodes was brought forward. Using the neighbor geographical location information, according to the principle of equivalent collision region, the algorithm could reduce redundant nodes from receivers, which is unnecessary for acknowledgement. Thus, the...
Grid systems consist of a large number of resources with different reliabilities. This paper addresses the problem of reducing the cost of using a grid system provided that a prescribed level of reliability is achieved. An O(n2ldrk) time algorithm is presented for choosing resources from available ones so that the above mentioned target is realized. In the algorithm, n stands for the total number...
Sets of Pairs of Functions to be Distinguished (SPFD) is a functional flexibility representation method that was recently introduced in the logic synthesis domain, and promises superiority in exploring the flexibility offered by a design over all previous representation methods. In this work, we illustrate how the SPFD of a particular wire reveals information regarding the number of potential transient...
The problem of detection of control flow errors in software has been studied extensively in literature and many detection techniques have been proposed. These techniques typically have high memory and performance overheads and hence are unusable for real-time embedded systems which have tight memory and performance budgets. This paper presents two algorithms by which the overheads associated with...
In this paper a BISR architecture for embedded memories is presented. The proposed scheme utilises a multiple bank cache-like memory for repairs. Statistical analysis is used for minimisation of the total resources required to achieve a very high fault coverage. Simulation results show that the proposed BISR scheme is characterised by high efficiency and low area overhead, even for high defect densities...
Networks on chips (NoCs) provide a mechanism for handling complex communications in the next generation of integrated circuits. At the same time, lower yield in nano-technology, makes self repair communication channels a necessity in design of digital systems. This paper proposes a reliable NoC architecture based on specific application mapped onto an NoC. This architecture is capable of recovering...
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