• Modelling and Evaluation of CCN-Caching Trees

    Conference paper
    Networking 2011, Lecture Notes in Computer Science (6640)

    This paper creates a simple mathematical model based on Markov chains which can model (with some simple assumptions) the type of cacheing trees seen in content centric networking. The model is tested with some simulation results.

  • Balancing by PREFLEX: Congestion Aware Traffic Engineering

    Conference paper
    Networking 2011, Lecture Notes in Computer Science (6641)

    This paper considers the problem of balancing traffic across network egresses. It achieves a workable solution using a scalable packet market scheme which couples end-hosts controlling their own connection with an overall controller which can select routes appropriately for each flow.

    The flows are balanced to seek paths which minimise loss.

  • Criticisms of modelling packet traffic using long-range dependence

    Workshop paper
    Performance Modeling and Evaluation of Computer and Telecommunications (PMECT), ICCCN Workshop

    This paper looks at the phenomenon of long-range dependence. It shows that certain long-range dependent models give answers which contain infinities and also that this behaviour will not be detected by a naive modelling approach. The work is extended in the JCCS paper

  • The performance of locality-aware topologies for peer-to-peer live streaming

    Journal Paper
    IET Software 6(3) p. 470--479

    This paper creates software models of how P2P network topologies could wire up. It considers the possible strategies such as connecting to close nodes, connecting to random links and so on. Resilience and delay are considered.

  • LiveShift: Mesh-Pull Live and Time-Shifted P2P Video Streaming

    Conference paper
    36th Annual IEEE Conference on Local Computer Networks

    This paper looks at the implementation of a live streaming peer-to-peer video system. The system is a hybrid which can cope with live streaming and video on demand.

  • A practical system for improved efficiency in frequency division multiplexed wireless networks

    Journal Paper
    IET Communications, Volume 6, issue 4, p. 449-457

    This paper looks at the problem of sending data using a variation on Orthogonal Frequency Division Multiplexing. In this variant frequencies are packed slightly closer. This means the frequencies are no longer orthogonal but more may be packed into a given amount of spectrum.

  • Modelling the Tradeoffs in Overlay-ISP Cooperation

    Conference paper
    Networking 2012, Lecture Notes in Computer Science (7290)

    This paper considers the tradeoffs when ISPs collaborate with content providers for mutual benefit.

  • On the selection of management/monitoring nodes in highly dynamic networks

    Journal Paper
    IEEE Transactions on Computers, vol.62, no.6, pp.1207,1220

    This paper considers the problems of placing management or monitoring nodes in a dynamic network. It trades off:
    1) Selecting long-lived nodes
    2) Selecting optimal nodes for traffic (close to the nodes they manage).