End-to-end availability considerations for services over IMS

Asthana, Abhaya; Bauer, Eric J.; Sharma, Meenakshi; Zhang, Xuemei

doi:10.1002/bltj.20189

Cited by 5 publications

(5 citation statements)

References 4 publications

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“…An end-to-end view requires synthesis of disparate, voluminous data into a coherent data model. 5. Organizational boundaries encumber support of services that span multiple domains.…”

Section: The Problem Of End-to-end Service Availabilitymentioning

confidence: 99%

“…Thus, different access options can be "snapped-in" as appropriate. Similarly, the network core can be studied with various service options.End-to-end predictive models use a combination of reliability block diagrams and Markov modeling approaches to compute IPTV solution level metrics [3,5,13,17]. This combination models individual solution network elements and end-to-end networklevel metrics.…”

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confidence: 99%

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End-to-end service availability support: Theory and application

Asthana¹,

Blake²,

Jordan³

et al. 2010

Bell Labs Tech. J.

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To ensure that Alcatel-Lucent solutions deliver the end-to-end service availability and quality expected by service providers, new capabilities are required to model, measure, and evaluate the robustness and effectiveness of the solutions over their lifecycles. This paper describes the implementation of a proactive end-to-end service availability support platform that meets the needs above for network technologies and services such as IP Multimedia Subsystem (IMS) and Internet Protocol television (IPTV). Key innovations include a model that predicts end-to-end service availability across an entire solution, near-real time secure collection and centralization of all available network and service data, and a data model that derives the critical end-toend service availability metrics from this data. These three elements were combined and implemented. The platform enables operations staff to receive early warning indications of impending issues with each service. It also helps technical assistance centers to rapidly troubleshoot critical problems. We present lessons learned from practical application of these methods to IPTV solutions. © 2010 Alcatel-Lucent.voice-centric circuit-based networks. In the past, data services have seldom been required to provide the levels of quality and reliability that are required now that services like TV and other applications are carried over them. Subscriber satisfaction depends on a service as a whole working correctly, with high quality and uninterrupted availability. Accordingly, service providers must establish an environment for efficient, entiresolution support, as opposed to maintenance of individual product robustness.In addition to network complexity, lack of experience with next-generation technologies is a major stumbling block for providers planning large-scale IntroductionA significant challenge telecommunications companies face today is management of end-to-end service availability (SA) and quality. Twenty-first century networks are technologically capable of delivering a wide range of Internet Protocol (IP)-based services to subscribers, with few limitations on the types of applications available. Moreover, deployments are expanding impressively in scale: for example, in December 2008, AT&T announced its one-millionth Internet Protocol television (IPTV) subscriber in a 16-state, 79-market offering [6]. The abundance of applications and their explosive growth require a radically different operational approach from that of twentieth century deployments. Problems are difficult to diagnose, and the impact of issues is difficult to assess. Providers often must rely on subscriber calls to detect service problems-even problems deep inside the networkand use various ad hoc, manually intensive methods to address complaints. This approach is unsustainable as services expand to support millions of subscribers.In this paper, as a solution to these problems, we present the concept of end-to-end service availability support (E2E SAS). E2E SAS combines a wide range of techniques th...

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“…An end-to-end view requires synthesis of disparate, voluminous data into a coherent data model. 5. Organizational boundaries encumber support of services that span multiple domains.…”

Section: The Problem Of End-to-end Service Availabilitymentioning

confidence: 99%

mentioning

confidence: 99%

End-to-end service availability support: Theory and application

Asthana¹,

Blake²,

Jordan³

et al. 2010

Bell Labs Tech. J.

Self Cite

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“…They expected the proposed model to be used to determine required design targets such as switchover time and error detection time to achieve a given level of proxy server availability. In view point of end-to-end service reliability, Asthana et al (2006) presented a framework for establishing availability requirements in IMS architecture, which is the heart of NGN. They considered three physical domains: the access network, the IMS core, and application servers consisting of signaling and control plane, bearer plane, and management plane for framing the end-to-end availability analysis.…”

Section: Related Workmentioning

confidence: 99%

“…Earlier studies on reliability mostly focus on how to improve reliability of systems (Bennett, 2001;Gurbani et al, 2005) or how to compute the reliability of service based on dedicated modeling efforts (Vogt et al, 2003;Wang and Trivedi, 2005;Asthana et al, 2006). The purpose of this paper, instead, is to present a guideline to provide the required level of system reliability for satisfying the target service reliability in a converged network environment.…”

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confidence: 95%

Reliable service provisioning in converged multimedia network environment

Choi

Woo

Shim

2011

Journal of Network and Computer Applications

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“…IP Multimedia Subsystem (IMS) (Asthana et al 2006;Camarillo and Garcia-Martin 2004;Zhang and Johnson ''End-to-End Service Reliability Considerations for Converged Telecommunications Networks'', WOCC 2009) defines standard structures and interfaces with a centralized core functions. IP Multimedia Subsystem' open framework makes it possible to serve different access technologies such as different generations of wireline/wireless access, etc.…”

Section: Introductionmentioning

confidence: 99%

Reliability models for systems with internal and external redundancy

Zhang

Pham

Johnson

2010

Int J Syst Assur Eng Manag

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As the rapid development of computer-based systems and networks, more and more applications require non-stop, highly reliable services. To achieve high service availability and reliability, traditional redundancy inside the system may not be sufficient for these applications. External redundancy and recovery strategies are critical to meet the high availability requirements, reduce failure impact and improve survivability. New network infrastructure and protocols made these redundancy structures and recovery strategies feasible. This paper presents an integrated Markov reliability and availability model to estimate and compare the downtime of the different recovery strategies. The model provides quantitative evaluations of reliability for the different architecture options. This can be further combined with other performance and capacity analysis to support architecture design and other decision making.

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End-to-end availability considerations for services over IMS

Cited by 5 publications

References 4 publications

End-to-end service availability support: Theory and application

End-to-end service availability support: Theory and application

Reliable service provisioning in converged multimedia network environment

Reliability models for systems with internal and external redundancy

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