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  • Communications and Radar  (4)
  • METALLIC MATERIALS
  • 2000-2004  (4)
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Year
  • 1
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    Achieving QoS for TCP Traffic in Satellite Networks with Differentiated Services (2001)
    In:  CASI
    Details
    Publication Date: 2018-06-06
    Description: Satellite networks play an indispensable role in providing global Internet access and electronic connectivity. To achieve such a global communications, provisioning of quality of service (QoS) within the advanced satellite systems is the main requirement. One of the key mechanisms of implementing the quality of service is traffic management. Traffic management becomes a crucial factor in the case of satellite network because of the limited availability of their resources. Currently, Internet Protocol (IP) only has minimal traffic management capabilities and provides best effort services. In this paper, we presented a broadband satellite network QoS model and simulated performance results. In particular, we discussed the TCP flow aggregates performance for their good behavior in the presence of competing UDP flow aggregates in the same assured forwarding. We identified several factors that affect the performance in the mixed environments and quantified their effects using a full factorial design of experiment methodology.
    Keywords: Communications and Radar
    Type: Quality of Service for Real-Time Applications Over Next Generation Data Networks; 47-74; NASA/TM-2001-210904
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
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    QoS for Real Time Applications over Next Generation Data Networks (2001)
    In:  CASI
    Details
    Publication Date: 2018-06-06
    Description: This viewgraph information provides information on establishing Quality of Service (QoS) for satellite communication networks.
    Keywords: Communications and Radar
    Type: Quality of Service for Real-Time Applications Over Next Generation Data Networks; 101-158; NASA/TM-2001-210904
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 3
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    Improving Explicit Congestion Notification with the Mark-Front Strategy (2001)
    In:  CASI
    Details
    Publication Date: 2018-06-06
    Description: Delivering congestion signals is essential to the performance of networks. Current TCP/IP networks use packet losses to signal congestion. Packet losses not only reduces TCP performance, but also adds large delay. Explicit Congestion Notification (ECN) delivers a faster indication of congestion and has better performance. However, current ECN implementations mark the packet from the tail of the queue. In this paper, we propose the mark-front strategy to send an even faster congestion signal. We show that mark-front strategy reduces buffer size requirement, improves link efficiency and provides better fairness among users. Simulation results that verify our analysis are also presented.
    Keywords: Communications and Radar
    Type: Quality of Service for Real-Time Applications Over Next Generation Data Networks; 75-92; NASA/TM-2001-210904
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 4
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    Quality of Service for Real-Time Applications Over Next Generation Data Networks (2001)
    In:  CASI
    Details
    Publication Date: 2019-07-11
    Description: This project, which started on January 1, 2000, was funded by NASA Glenn Research Center for duration of one year. The deliverables of the project included the following tasks: Study of QoS mapping between the edge and core networks envisioned in the Next Generation networks will provide us with the QoS guarantees that can be obtained from next generation networks. Buffer management techniques to provide strict guarantees to real-time end-to-end applications through preferential treatment to packets belonging to real-time applications. In particular, use of ECN to help reduce the loss on high bandwidth-delay product satellite networks needs to be studied. Effect of Prioritized Packet Discard to increase goodput of the network and reduce the buffering requirements in the ATM switches. Provision of new IP circuit emulation services over Satellite IP backbones using MPLS will be studied. Determine the architecture and requirements for internetworking ATN and the Next Generation Internet for real-time applications.
    Keywords: Communications and Radar
    Type: NASA/TM-2001-210904
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
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