Fast channel zapping with destination oriented multicast for ip video delivery
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This document discusses a destination-oriented multicast assisted zapping acceleration (DAZA) scheme for IP video delivery. It aims to improve channel zapping time, which is an important quality metric. The DAZA scheme uses time-shifted subchannels to ensure fast zapping within a delay bound while maintaining picture quality. It analyzes the optimal subchannel data rate and addresses a startup effect issue. DAZA implements scalable destination-oriented multicast instead of traditional IP multicast. Simulation results demonstrate that DAZA validates the analysis and improves robustness and messaging overhead in distributed environments.
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Dotnet fast channel zapping with destination-oriented multicast for ip video...
This document summarizes a research paper about improving channel zapping time for IP video delivery systems like IPTV. It proposes using time-shifted subchannels and destination-oriented multicast. The paper first analyzes the properties of time-shifted subchannels, showing there is an optimal data rate to minimize redundant traffic. It also identifies a potential start-up effect issue and proposes a solution. Second, it introduces a destination-oriented multicast assisted zapping acceleration scheme that allows subscribers to seamlessly switch channels without control messages and is robust to signaling delays. Simulations demonstrate the validity of the analysis and proposed scheme.
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This document summarizes a research paper about improving channel zapping time for IP video delivery systems like IPTV. It proposes using time-shifted subchannels and destination-oriented multicast. The paper first analyzes the properties of time-shifted subchannels, showing there is an optimal data rate to reduce redundant traffic. It also identifies a potential issue where zapping delays could be violated and proposes a solution. Second, it introduces a destination-oriented multicast assisted zapping acceleration scheme that allows subscribers to seamlessly switch channels without control messages and is robust to signaling delays. Simulations implementing this scheme demonstrate its effectiveness.
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Mazharul Islam Khan (063457056)
1. The document discusses how Multi-Protocol Label Switching (MPLS) can improve Voice over Internet Protocol (VoIP) services by enabling traffic engineering and quality of service controls.
2. MPLS allows traffic to be forwarded at layer 2 for faster routing and makes it easier to manage networks for quality of service. This helps meet the low latency and jitter requirements of real-time VoIP traffic.
3. The document analyzes VoIP performance over an MPLS network connecting three branch offices using a network monitoring tool. It finds that while MPLS provides better connectivity than the public Internet, additional steps may be needed to deliver business-quality VoIP.
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WebRTC DataChannels demystified
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- Data channels use SCTP over DTLS for transport, providing reliability, security, and NAT traversal. They have a WebSocket-like API.
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This document summarizes a study that simulated voice communication over wired networks using the NS-2 network simulator. The study modeled VoIP traffic between nodes using the SCTP protocol and added background traffic to evaluate its effects. Key findings from the simulation included:
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2) Average jitter (packet delay variation) was calculated to be 0.006 seconds, showing instability in the network with changing traffic patterns.
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