Managing adaptive presentation executions in distributed multimedia database systems

Thimm, Heiko; Klas, Wolfgang; Walpole, Jonathan; Pu, Calton; Cowan, Crispin

doi:10.1109/mmdbms.1996.541866

Cited by 10 publications

(6 citation statements)

References 14 publications

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“…Examples of QoS-aware MCs are Self-adapting components [21] and QoS-mechanistic components [16]. QoS mechanisms contained in QoS-aware MCs are servicespecific algorithms for maintaining QoS contracts held by that component.…”

Section: Managed Componentsmentioning

confidence: 99%

Towards scalable and affordable content distribution services

Plagemann

Goebel²,

Mathy

et al. 2003

Proceedings of the 7th International Conference on Telecommunications, 2003. ConTEL 2003.

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Content Distribution Networks (CDNs) are based on a static infrastructure, and caching and replication in CDNs are performed in a static manner. We argue that it is necessary to design future CDNs in such a way that they are scalable to reach enough customers, their costs are kept low, and they provide a Quality-of-Service that satisfies the client requirements. To reach these goals, more flexibility is needed in CDNs. Flexibility will enable CDNs to perform faster and better decisions for caching and replication, and it will reduce the amount of manual intervention that is necessary to manage and maintain the CDN. In this paper, we discuss the application of Peer-to-Peer mechanisms in CDNs that support advanced caching and replication strategies and their combination with a dynamic QoS management hierarchy to reach the needed flexibility in CDNs.

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Section: Managed Componentsmentioning

confidence: 99%

Towards scalable and affordable content distribution services

Plagemann

Goebel²,

Mathy

et al. 2003

Proceedings of the 7th International Conference on Telecommunications, 2003. ConTEL 2003.

View full text Add to dashboard Cite

show abstract

“…vices is an open problem: QoS work in file systems and storage systems has focused on scheduling disk bandwidth and allocating buffer space [10,17], leaving richer DBMS services unmanaged. For example, DBMS transactions must lock logical objects to assure data consistency.…”

Section: • Qos Management In Mmdbmss and Other Complex Ser-mentioning

confidence: 99%

“…Examples of QoS-aware MCs are self-adapting components [10] and QoSmechanistic components [12]. QoS mechanisms contained in QoS-aware MCs are service-specific algorithms for establishing and maintaining QoS contracts held by that component.…”

Section: Managed Componentsmentioning

confidence: 99%

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Dynamic end-to-end QoS management middleware for distributed multimedia systems

et al. 2002

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Abstract. In this paper, we present a separable, reusable middleware solution that provides coordinated, end-to-end QoS management over any type of service component, and can use existing (legacy) QoS management solutions (by using wrappers) in a distributed multimedia system. Our middleware solution incorporates strategic and tactical QoS managers, and supports protocols and messages between tactical managers and managed application components, and between QoS managers in the management hierarchy. Strategic QoS managers take a global view of QoS provided by a set of application components within the manager's policy domain. Tactical QoS managers provide local control over application components. We introduce the concept of QoS policy domains to scope the authority of a strategic QoS manager. We describe how the management hierarchy is dynamically configured and reconfigured based on runtime needs of the application.

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“…This is why multimedia presentations have near real-time requirements. The permitted deviations of the actual presentation quality from the specified presentation quality is captured by means of QoS parameters, such as average delay, speed ratio, utilization, jitter and skew [12]. However, different application domains may have different QoS requirements.…”

Section: Introductionmentioning

confidence: 99%

Modeling with enhanced prioritized Petri nets: EP-nets

Guan

Lim

2002

Computer Communications

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Recently, many researchers have their attention focused on interactive temporal models, like the extended finite state machines or the extended Petri net models. One of the recent mechanisms proposed for synchronization is known as the Prioritized Petri net, P-Net, which is implemented in the Distributed Object Composition Petri Net, DOCPN. The development of DOCPN has achieved media synchronization in distributed multimedia environments. This P-Net mechanism holds a powerful property: if the deadline is due, it forces firing events regardless whether they are ready or not. A side effect might occur, which is known as premature/late arriving tokens. This paper addresses the key issue of providing flexible multimedia presentation with user interaction and suggests improved P-Net models, which handles premature/late arriving tokens, accommodates dynamic event mechanisms and can specify user interactions in real time during presentation. To demonstrate the concepts are feasible, a prototype with runtime support has been developed and used to construct several interactive multimedia applications, including skip, freeze and restart, reverse, speed scaling, and multicasting.

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Managing adaptive presentation executions in distributed multimedia database systems

Abstract: The

Cited by 10 publications

References 14 publications

Towards scalable and affordable content distribution services

Towards scalable and affordable content distribution services

Dynamic end-to-end QoS management middleware for distributed multimedia systems

Modeling with enhanced prioritized Petri nets: EP-nets

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