User-Empowered Programmable Network Support for Collaborative Environment

Hladká, Eva; Holub, Petr; Denemark, Jiří

doi:10.1007/978-3-540-30197-4_37

Cited by 12 publications

(5 citation statements)

References 5 publications

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“…9 The distributors are application-level stream routers with data multiplication capability, used to build the overlay network for media streams distribution. Tools like Active Elements [26] or simple UDP packet reflectors [25] may be used as distributors.…”

Section: Problem Descriptionmentioning

confidence: 99%

Data transfer planning with tree placement for collaborative environments

2011

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Latency-sensitive data distribution and media streaming is a part of many network-centric applications. Based on our previous practical experiences with interactive high-quality media distribution and orchestration of network-centric collaborative environments, we have developed an automated planner for media stream distribution in environments where bandwidth of streams is comparable to capacities of network links. We have successfully adopted methods of constraint programming to deal with this problem. We provide a new comprehensive description of the constraint model which builds upon basic algebraic description we have published earlier. To formulate the model, a tree placement problem is proposed and a new corresponding variant of the link-based model for traffic placement problem is applied. We prove correctness of the proposed constraint satisfaction problem to present validity of included constraints with respect to the desired functionality of planning. An evaluation of the implemented solver is presented on a number of experimental problems to show effectiveness of the formulation. Importantly, the solver is a part of an application middleware called CoUniverse, which is pioneering orchestration of component-based interactive collaborative environments in 284 Constraints (2011) 16:283-316 a number of global demonstrations and projects. Both flexibility of the described model as well as generality of other parts of the CoUniverse framework allowed it to be one of very few early adopters of bandwidth-on-demand services for advanced high-bandwidth applications.

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Section: Problem Descriptionmentioning

confidence: 99%

Data transfer planning with tree placement for collaborative environments

2011

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“…The serious problem of the single AE is limited scalability and missing robustness and therefore AE network has been proposed. The first solution were AEs interconnected by predefined static data distribution models [8]. But such a system lacks load-balancing, dynamic recovery capability, and it requires a manual setup.…”

Section: Network Of Active Elementsmentioning

confidence: 99%

Active Element Network with P2P Control Plane

Procházka

Holub

Hladká

2006

Self-Organizing Systems

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Multi-point data distribution for synchronous multimedia communication poses interesting problem for networking environment usually implemented by either native or virtual multicast. In this paper, we describe and evaluate a scalable network of Active Elements (AE) that implements user-empowered virtual-multicast overlay network for synchronous data distribution and processing in the network. The AE network is based on strict separation of control plane and data plane. The control plane is organized as peer-to-peer network in order to achieve robustness and user-empowered approach while sacrificing efficiency to some extent. The data plane which handles the actual data distribution is optimized for efficiency and allows pluggable implementation of different distribution models. We present a prototype implementation with control plane based on JXTA peer-to-peer substrate and evaluate its behavior, robustness, and efficiency. We also describe some pilot applications the AEs network can be used with.

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“…This 2D full-mesh tunneling model was studied and described in detail in [2] Let's assume a 2D full mesh of reflectors, each populated with n r clients. The limiting traffic in this mesh is again the outbound traffic on the AE which scales as out = n 2 r m + n r (m − 2).…”

Section: D Full Meshmentioning

confidence: 99%

“…A simple network of reflectors [2] is a robust solution minimizing additional latency (number of hops within the network), but it still has rather limited scalability. In this paper, we study scalable and robust synchronous multimedia distribution approaches with more efficient application-level distribution schemes.…”

Section: Introductionmentioning

confidence: 99%

Scalability and Robustness of Virtual Multicast for Synchronous Multimedia Distribution

Holub¹,

Hladká²,

Matyska³

2005

Networking - ICN 2005

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Abstract. A simple UDP packet reflector for virtual multicast multimedia transfer is extended to form a distributed system of active elements that solves the scalability problem of otherwise centralistic approach. The robustness of such virtual multicast delivery system is also discussed and shown to be better than the native multicast can offer. The maximum latency, important for multimedia transfer and related to the number of hops through the network of active elements, can be kept bounded. Possible support for synchronized multi-stream transfer is also discussed.

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User-Empowered Programmable Network Support for Collaborative Environment

Cited by 12 publications

References 5 publications

Data transfer planning with tree placement for collaborative environments

Data transfer planning with tree placement for collaborative environments

Active Element Network with P2P Control Plane

Scalability and Robustness of Virtual Multicast for Synchronous Multimedia Distribution

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