An efficient networking technique for synchronous e-learning platforms in corporate environments

Granda, Juan C.; García, Daniel; Nuño, Pelayo; Suárez, Francisco J.

doi:10.1016/j.comcom.2010.02.020

Cited by 13 publications

(8 citation statements)

References 14 publications

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“…The platform assumes that IP multicast is available in each site of the organization, so the platform interconnects several multicast islands in an overlay network during the e-training activity to deliver multimedia contents to all the participants. This design has proved to be highly efficient [14].…”

Section: A Synchronous E-training Platformmentioning

confidence: 99%

Towards Resilient Synchronous e-Training Platforms

Granda

Nuño

García

et al. 2011

2011 IEEE 10th International Symposium on Network Computing and Applications

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Synchronous e-training is emerging as an alternative for developing human resources training plans in large organizations. However, synchronous e-training platforms must face many issues affecting their resilience. Self-recovering and self-protection software techniques should be implemented to enable the continuity of e-training activities faced with network failures or entities of the platform going down. In this paper, the resilience issues in synchronous e-training are identified, and those presented in a real e-training platform are analyzed. The platform includes a self-optimizing technique to make efficient use of network resources as participants join and leave. Furthermore, various self-recovering and a self-protection techniques are proposed, making possible the continuity of ongoing e-training activities with reduced functionality until the automatic full system recovery. Most of the proposed techniques are applicable to other real-time communication systems, since the e-training platform is built using standard technologies such as SIP and RTP, commonly used in voice over IP systems.

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Section: A Synchronous E-training Platformmentioning

confidence: 99%

Towards Resilient Synchronous e-Training Platforms

Granda

Nuño

García

et al. 2011

2011 IEEE 10th International Symposium on Network Computing and Applications

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“…Besides, the local network of a corporate site has plenty of resources compared to those available in its link to the Internet. In the case that a participant generates one data stream, the number of unicast data streams sent and received by relay i (θ i ) can be computed using the number of relays (S) and the number of participants served by the relay (n i ) [13]. The number of participants of relay i can be further divided in participants in the multicast island (m i ) and participants outside this, served using unicast (u i ).…”

Section: Refined Self-healing Techniquementioning

confidence: 99%

“…It also forwards streams coming from peer relays to the participants using IP multicast. Therefore, IP multicast is used where available, providing an efficient delivery service [13].…”

Section: Overlay Network Architecturementioning

confidence: 99%

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Resilient overlay network for real-time interactive multimedia sessions in corporate networks

et al. 2015

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“…This design assumes that IP multicast is available in each multicast island, so the overlay interconnects many multicast islands during the activities to deliver multimedia contents to all the participants. The overlay has proved to be highly efficient [25].…”

Section: Overlay Network Architecturementioning

confidence: 99%

A self-managed resilient overlay network for interactive multimedia communications

Granda

Nuño

García

et al. 2014

2014 IEEE Symposium on Computers and Communications (ISCC)

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The use of interactive multimedia communications is widespread in business and education, providing an enriched user experience in teleconferencing, distance learning and online meetings. Overlays networks are the underlying mechanisms enabling multipoint communication in interactive multimedia platforms. They must cope with constraints on heterogeneity, scalability and availability of communications, making their deployment and management a true challenge. Thus, several issues might affect the resilience of overlay networks, threatening ongoing communications. Overlay networks usually use self-organization and self-stabilization techniques to achieve resilient communications. Techniques implementing other self-management properties such as self-regulation also help in improving the resilience of the overlay. In this paper, the resilience of a reflector-based overlay network is improved with a self-regulation technique based on media transcoding. This balances the workloads of the reflectors of the overlay avoiding excessive usage of network links. As a result, the overlay is more resilient to failures. Extensive simulations have been carried out, and various media transcoding schemes have been compared, proving that selfregulation techniques improve the resilience of the reflector-based overlay network.

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An efficient networking technique for synchronous e-learning platforms in corporate environments

Cited by 13 publications

References 14 publications

Towards Resilient Synchronous e-Training Platforms

Towards Resilient Synchronous e-Training Platforms

Resilient overlay network for real-time interactive multimedia sessions in corporate networks

A self-managed resilient overlay network for interactive multimedia communications

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