Results 211 to 220 of about 836,778 (261)
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Service-level availability estimation of GPRS
IEEE Transactions on Mobile Computing, 2003The General Packet Radio Service (GPRS) extends the Global System Mobile Communication (GSM), by introducing a packet-switched transmission service. This paper analyses the GPRS behavior under critical conditions. In particular, we focus on outages, which significantly impact the GPRS dependability.
Stefano Porcarelli +4 more
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End-to-end WAN service availability
IEEE/ACM Transactions on Networking, 2003This paper seeks to understand how network failures affect the availability of service delivery across wide-area networks (WANs) and to evaluate classes of techniques for improving end-to-end service availability. Using several large-scale connectivity traces, we develop a model of network unavailability that includes key parameters such as failure ...
Michael Dahlin +3 more
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Automatic service availability management
Proceedings ISAD 93: International Symposium on Autonomous Decentralized Systems, 2002A new kind of distributed system service called availability management service is introduced. It is responsible for ensuring that the critical services of a distributed system remain continuously available to users despite arbitrary numbers of concurrent node removals and node restarts caused by failures, maintenance, and growth.
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Availability and reliability of switched services
IEEE Communications Magazine, 1993The emerging customer-oriented definition of switched service availability, including how this definition is useful for a customer comparing a switched service with a dedicated service, is discussed. The ways in which a user of a switched service can evaluate the service's availability without having access to network internal information are described.
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In Computer-Supported Cooperative Work, respecting themutual availability in teams to reduce disturbinginterruptions while keeping team members in touch is veryimportant. Detecting team members' availability ispossible, but complex. In this paper we present theAvailability-as-a-Service microservice that provides ageneric interface to eye trackers ...
Lang, Marius, Gross, Tom
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Lang, Marius, Gross, Tom
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Analytical Availability Assessment of IT Services
2008The often neglected problem in the service availability analysis is mapping between ICT-infrastructure and service-level availability. We present an approach which allows to map ICT-infrastructure elements to services, and to analytically assess steady-state, interval and user-perceived service availability, based on failure distributions of ICT ...
Miroslaw Malek +2 more
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Managing Availability of web services in service oriented systems
2015 Asia-Pacific Software Engineering Conference (APSEC), 2015In real world Service Oriented Software Systems, changes to web services infrastructure are not an exception but a rule. Timely detection and a fast reaction to handle these changes are important to reduce the impact. This paper proposes an agent based framework to manage the situation when third party web services become unavailable.
Navinderjit Kaur Kahlon +3 more
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Towards continuous availability of Internet services through availability domains
Proceeding International Conference on Dependable Systems and Networks. DSN 2000, 2000The increasing number of Internet users has caused a dramatic increase in electronic commerce. This growth is outpacing technologies for dependability, causing traditional views of high availability to come under question. In particular, Internet failures are a phenomenon external to the owner of a commerce site that must be dealt with, and therefore ...
Nicholas S. Bowen +2 more
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TTA Supported Service Availability
2005The Time-Triggered Architecture (TTA) is a distributed architecture for high-dependability real-time applications. In this paper the mechanisms that guarantee a high availability of TTA services are presented. The paper starts with a deliberation on the fault-hypothesis of the TTA and discusses the partitioning of a TTA system into independent fault ...
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Service availability quantification in datacommunication networks
2011 34th International Conference on Telecommunications and Signal Processing (TSP), 2011The aim of this work is to propose a novel methodology for quantification of datacommunication network availability. Currently used reliability calculation model is not very suitable for networking environment with many-to-many type of communication. In this paper we propose a novel method to quantify service availability in datacommunication networks.
Karel Slávicek +2 more
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