Multimedia teleconferencing over international packet switched networks

Crowcroft, Jon; Kirstein, Peter T.; Timm, D.

doi:10.1109/tricom.1991.152872

Cited by 2 publications

(3 citation statements)

References 7 publications

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“…Streaming resources are reserved for media streams, but control traffic is served based on the best-effort service model. 4 The middleware considers the links as point-to-point connections for duplex communication between adjacent pairs of nodes. .…”

Section: Mechanismmentioning

confidence: 99%

“…on the one hand and introduction of effective encoding techniques, such as MPEG-4, that allow streaming of continuous media (e.g., video and audio) with reasonably low bandwidth requirements on the other hand enabled the emergence of an enormous number of multimedia applications such as video-on-demand (VOD) [1], [2], [3], teleconferencing [4], distance learning [5], and interactive TV [6]. Researchers in academia and industry have been struggling for more than a decade to design highperformance centralized continuous media servers (CCMSs) [7], [8], [9], [10] and provide facilities to support specific QOS requirements of continuous media communications on the network [11], [12], [13], [14], all motivated by a desire to realize wide-spread use of these applications.…”

Section: Introductionmentioning

confidence: 99%

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Decentralized resource management for a distributed continuous media server

Shahabi¹,

Banaei-Kashani²

2002

IEEE Trans. Parallel Distrib. Syst.

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AbstractÐDistributed continuous media server (DCMS) architectures are proposed to minimize the communication-storage cost for those continuous media applications that serve a large number of geographically distributed clients. Typically, a DCMS is designed as a pure hierarchy (tree) of centralized continuous media servers. In an earlier work, we proposed a redundant hierarchical topology for DCMS networks, termed RedHi, which can potentially result in higher utilization and better reliability over pure hierarchy. In this paper, we focus on the design of a resource management system for RedHi that can exploit the resources of its DCMS network to achieve these performance objectives. Our proposed resource management system is based on a fully decentralized approach to achieve optimal scalability and robustness. In general, the major drawback of a fully decentralized design is the increase in latency time and communication overhead to locate the requested object. However, as compared to the typically long duration and high resource/ bandwidth requirements of continuous media objects, the extra latency and overhead of a decentralized resource management approach become negligible. Moreover, our resource management system collapses three management tasks, 1) object location, 2) path selection, and 3) resource reservation, into one fully decentralized object delivery mechanism, reducing the latency even further. In sum, decentralization of the resource management satisfies our scalability and robustness objectives, whereas collapsing the management tasks helps alleviate the latency and overhead constraints. To achieve a high resource utilization, the object delivery scheme uses our proposed cost function, as well as various object location and resource reservation policies to select and allocate the best streaming path to serve each request. The object delivery scheme is designed as an application layer resource management middleware for the DCMS architecture to be independent of the underlying telecommunication infrastructure. Our experiments show that our resource management system is successful in realization of the higher resource utilization for the DCMS networks with the RedHi topology.Index TermsÐDistributed continuous media servers, decentralized resource management, distributed multimedia systems, content delivery networks, distributed information systems, video-on-demand.

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Section: Mechanismmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Decentralized resource management for a distributed continuous media server

Shahabi¹,

Banaei-Kashani²

2002

IEEE Trans. Parallel Distrib. Syst.

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Decentralized resource management for a distributed continuous media server

Shahabi

Banaei-Kashani

2002

IEEE Trans. Parallel Distrib. Syst.

View full text Add to dashboard Cite

Distributed continuous media server (DCMS) architectures are proposed to minimize the communication-storage cost for those continuous media applications that serve a large number of geographically distributed clients. Typically, a DCMS is designed as a pure hierarchy (tree) of centralized continuous media servers. In an earlier work, we proposed a redundant hierarchical topology for DCMS networks, termed RedHi, which can potentially result in higher utilization and better reliability over pure hierarchy. In this paper, we focus on the design of a resource management system for RedHi that can exploit the resources of its DCMS network to achieve these performance objectives. Our proposed resource management system is based on a fully decentralized approach to achieve optimal scalability and robustness. In general, the major drawback of a fully decentralized design is the increase in latency time and communication overhead to locate the requested object. However, as compared to the typically long duration and high resource/ bandwidth requirements of continuous media objects, the extra latency and overhead of a decentralized resource management approach become negligible. Moreover, our resource management system collapses three management tasks, 1) object location, 2) path selection, and 3) resource reservation, into one fully decentralized object delivery mechanism, reducing the latency even further. In sum, decentralization of the resource management satisfies our scalability and robustness objectives, whereas collapsing the management tasks helps alleviate the latency and overhead constraints. To achieve a high resource utilization, the object delivery scheme uses our proposed cost function, as well as various object location and resource reservation policies to select and allocate the best streaming path to serve each request. The object delivery scheme is designed as an application layer resource management middleware for the DCMS architecture to be independent of the underlying telecommunication infrastructure. Our experiments show that our resource management system is successful in realization of the higher resource utilization for the DCMS networks with the RedHi topology.Index Terms-Distributed continuous media servers, decentralized resource management, distributed multimedia systems, content delivery networks, distributed information systems, video-on-demand. ae 710

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Multimedia teleconferencing over international packet switched networks

Cited by 2 publications

References 7 publications

Decentralized resource management for a distributed continuous media server

Decentralized resource management for a distributed continuous media server

Decentralized resource management for a distributed continuous media server

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