Operating system issues for continuous media

Schulzrinne, Henning

doi:10.1007/s005300050028

Cited by 16 publications

(4 citation statements)

References 62 publications

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“…There are however, several QoS controlled operating systems [Leslie96, Mosberger97, Nakajima98] which provide facilities for fine grain resource management. Therefore, similarly to others [Engler95,Schulzrinne96], we expect the new generation of operating systems that are being developed to provide this type of support.…”

Section: Resource Allocatormentioning

confidence: 66%

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User centric QoS management framework and its implementation

Seneviratne

Cho²

2000

ICA

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There have been numerous proposals for managing the end-to-end Quality of Service of multimedia applications. These approaches can be categorised into two groups, namely schemes that attempt to provide service guarantees, and schemes that provide best effort service. The schemes that attempt to provide service guarantees, only have limited applicability as they require apriori knowledge of all resource requirements. In contrast, the approaches, which provide best effort service cannot provide predictable services, and use application adpativity to deal with variation in service levels. However, neither of these approaches facilitate user participation in the decision making process except at the start of the session. In this paper, we present a new QoS management framework, which is user centric, and integrates the adaptability of the application and the resource management of the system. It presents the architecture of the proposed framework, and describes the design requirements of each of these architectural components. Then the viability of the proposed framework is demonstrated through a prototype implementation of the QoS management architecture Linux, and the use of an adaptive MPEG based video on demand application.

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Section: Resource Allocatormentioning

confidence: 66%

“…We believe that the type of support required by the QoS management framework presented in this paper will become readily available in the near future [Schulzrinne96]. When this support become widely available the proposed scheme can be realized with considerable ease, and will able to provide even richer functionality.…”

Section: Discussionmentioning

confidence: 96%

User centric QoS management framework and its implementation

Seneviratne

Cho²

2000

ICA

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“…It has been recognized that to support end-to-end QoS guarantees not only network aspects must be considered, but the end-system and OS-resources must also be taken into account [26]. This requirement holds especially for continuous media applications as they have the most stringent resource requirements [36], [34]. In step with advances in resource guarantee provision in both fields, researchers identified the need for resource orchestration and developed methods that allow for meeting the user's QoS requirements on an end-to-end basis [25], [6].…”

Section: A Reservationmentioning

confidence: 99%

A framework based approach to the development of network aware applications

Bolliger

Gross

1998

IIEEE Trans. Software Eng.

121

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Modern networks provide a QoS (quality of service) model to go beyond best-effort services, but current QoS models are oriented towards low-level network parameters (e.g., bandwidth, latency, jitter). Application developers, on the other hand, are interested in quality models that are meaningful to the end-user and therefore struggle to bridge the gap between network and application QoS models. Examples of application quality models are response time, predictability, or a budget (for transmission costs). Applications that can deal with changes in the network environment are called network-aware. A network-aware application attempts to adjust its resource demands in response to network performance variations. This paper presents a framework-based approach to the construction of networkaware programs. At the core of the framework is a feedback loop that controls the adjustment of the application to network properties. The framework provides the skeleton to address two fundamental challenges for the construction of network-aware applications: (i) how to find out about dynamic changes in network service quality and (ii) how to map applicationcentric quality measures (e.g., predictability) to network-centric quality measures (e.g., QoS models that focus on bandwidth or latency). Our preliminary experience with a prototype network-aware image retrieval system demonstrates the feasibility of our approach. The prototype illustrates that there is more to network-awareness than just taking network resources and protocols into account and raises questions that need to be addressed (from a software engineering point of view) to make a general approach to network-aware applications useful.

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“…CM [1] is characterized by a timing relationship between source and sink, that is, the sink has to reproduce the timing relationship that existed at the source. It can be videoconference or streaming, where the relationship is stricter in videoconference.…”

Section: Introductionmentioning

confidence: 99%

The SIP-CMI platform-an open testbed for advanced integrated continuous media services

Hurtado

Oller

Segura

2006

2nd International Conference on Testbeds and Research Infrastructures for the Development of Networks and Communities, 2006. TR

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We introduce the design an implementation of the SIPbased Continuous Media Integration (SIP-CMI) platform, an open, flexible, scalable testbed to support a wide and extensible set of next-generation continuous media services. SIP-CMI employs a modular architecture and is built using commodity hardware. This platform follows the principle that any continuous media service can be accessed by using the SIP protocol, regardless of the nature of the service; i, e, videoconference or streaming,. Furthermore, we explain how different ongoing projects are using this testbed to prototype and validate its advanced services.

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Operating system issues for continuous media

Abstract: Continuous media such as audio and video pose new challenges to all parts of multipurpose operating systems. We discuss issues related to CPU scheduling, memory allocation, system support and application environments and summarize some of the solutions proposed in the literature

Cited by 16 publications

References 62 publications

User centric QoS management framework and its implementation

User centric QoS management framework and its implementation

A framework based approach to the development of network aware applications

The SIP-CMI platform-an open testbed for advanced integrated continuous media services

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