The Experts below are selected from a list of 2715 Experts worldwide ranked by ideXlab platform

Xin Lin - One of the best experts on this subject based on the ideXlab platform.

  • ICWS - Modeling response time of SOAP over Http
    IEEE International Conference on Web Services (ICWS'05), 2005
    Co-Authors: Hui Liu, Xin Lin
    Abstract:

    The response time of SOAP invocation over Http is an important designing factor and evaluating metric for QoS and Web services related computing. This paper presents a novel model to compute response time of SOAP over Http/1.1. It takes several influencing parameters into account, including compression methods, maximum segment size, round trip time, initial value of time-out sequence, the number of packets per ACK, maximum congestion control window size and packet loss rate. How to set these parameters to compute the response time of SOAP over Http/1.1 is illustrated and the model is validated with TPC-H benchmark based simulation data.

David Ros - One of the best experts on this subject based on the ideXlab platform.

  • NTMS - TCP over Low-Power and Lossy Networks: Tuning the segment size to Minimize Energy Consumption
    2011 4th IFIP International Conference on New Technologies Mobility and Security, 2011
    Co-Authors: Ahmed Ayadi, Patrick Maillé, David Ros
    Abstract:

    Low-power and Lossy Networks (LLNs), like wireless networks based upon the IEEE 802.15.4 standard, have strong energy constraints, and are moreover subject to frequent transmission errors, not only due to congestion but also to collisions and to radio channel conditions. This paper introduces an analytical model to compute the total energy consumption in an LLN due to the TCP protocol. The model allows us to highlight some tradeoffs as regards the choice of the TCP maximum segment size, of the Forward Error Correction (FEC) redundancy ratio, and of the number of link-layer retransmissions, in order to minimize the total energy consumption.

  • TCP over low-power and lossy networks: tuning the segment size to minimize energy consumption
    arXiv: Networking and Internet Architecture, 2010
    Co-Authors: Ahmed Ayadi, Patrick Maillé, David Ros
    Abstract:

    Low-power and Lossy Networks (LLNs), like wireless networks based upon the IEEE 802.15.4 standard, have strong energy constraints, and are moreover subject to frequent transmission errors, not only due to congestion but also to collisions and to radio channel conditions. This paper introduces an analytical model to compute the total energy consumption in an LLN due to the TCP protocol. The model allows us to highlight some tradeoffs as regards the choice of the TCP maximum segment size, of the Forward Error Correction (FEC) redundancy ratio, and of the number of link-layer retransmissions, in order to minimize the total energy consumption.

J.p. Aspas - One of the best experts on this subject based on the ideXlab platform.

  • Performance optimisation evaluation of TCP/IP over wireless networks
    1998 IEEE International Performance Computing and Communications Conference. Proceedings (Cat. No.98CH36191), 1
    Co-Authors: A.c. Auge, J.p. Aspas
    Abstract:

    The transmission control protocol (TCP) is a large extended transport protocol, mainly used in fixed networks. It works well in those networks in which the main cause of packet loss is congestion. Some mechanisms included in the TCP optimise their use in this kind of networks. Today, Internet users need access it over wireless links in order to get this service anywhere they are. However, the TCP does not work well in wireless environments where losses are due to high bit error rates (BER). We evaluate the end-to-end throughput of a TCP connection with a wireless link. First, we demonstrate the impact of high BER in the TCP performance. Then, we optimise the throughput of the TCP connection choosing the best MTU (maximum segment size) in each case, and evaluate other aspects of interests.

Polychronis Koutsakis - One of the best experts on this subject based on the ideXlab platform.

  • APCC - An analysis of changing enterprise network traffic characteristics
    2017 23rd Asia-Pacific Conference on Communications (APCC), 2017
    Co-Authors: David Murray, Terry Koziniec, Sebastian Zander, Michael Dixon, Polychronis Koutsakis
    Abstract:

    Studies on the composition and nature of Internet protocols are crucial for continued research and innovation. This study used three different methods to investigate the presence and level of support for various Internet protocols. Internet traffic entering and exiting a university network was passively captured, anonymised and analysed to test protocol usage. Active tests probed the Internet's most popular websites and experiments on the default behaviour of popular client, server and mobile operating systems were performed to reconcile the findings of the passive data collection. These results are valuable to research areas, such as those using emulations and simulations, where realism is dependent on the accuracy of the underlying assumptions about Internet traffic. Prior work is leveraged to explore changes and protocol adoption trends. This study shows that the majority of Internet traffic is now encrypted. There has also been an increase in large UDP frames, which we attribute to the Google QUIC protocol. Support for TCP options such as Selective Acknowledgements (SACK) and maximum segment size (MSS) can now be assumed. Explicit Congestion Notification (ECN) usage is still marginal, yet active measurement shows that many servers will support the protocol if requested. Recent IETF standards such as Multipath TCP and TCP Fast Open have small but measurable levels of adoption.

Hui Liu - One of the best experts on this subject based on the ideXlab platform.

  • ICWS - Modeling response time of SOAP over Http
    IEEE International Conference on Web Services (ICWS'05), 2005
    Co-Authors: Hui Liu, Xin Lin
    Abstract:

    The response time of SOAP invocation over Http is an important designing factor and evaluating metric for QoS and Web services related computing. This paper presents a novel model to compute response time of SOAP over Http/1.1. It takes several influencing parameters into account, including compression methods, maximum segment size, round trip time, initial value of time-out sequence, the number of packets per ACK, maximum congestion control window size and packet loss rate. How to set these parameters to compute the response time of SOAP over Http/1.1 is illustrated and the model is validated with TPC-H benchmark based simulation data.