Time-dependent applications using TCP often send thin-stream traffic, characterised by small packets and high inter- transmission-times. Retransmissions after packet loss can result in very high delays for such flows as they often cannot trigger fast retransmit. Redundant Data Bundling is a mechanism that preempts the experience of loss for a flow by piggybacking unacknowledged segments … Continue reading
Category Archives: Publications
Accepted paper in the 7th International Workshop on Quality of Multimedia Experience (QoMEX 2015)
Video users in a multicast group may be highly heterogeneous in terms of individual channel conditions and requirements for video transmission, making it a challenging task for the network to optimally configure the resource management. In this paper, we consider a mathematical model for the choice of the optimum number of transmission opportunities, based on … Continue reading
Two accepted papers at the IAB SEMI Workshop ´15
Two papers were accepted and presented during the last week of January at the IAB SEMI Workshop in Zürich, Switzerland. “Tunneling Through Inner Space” by Bob Briscoe, and “Ossification: a result of not even trying?” by Michael Welzl, Gorry Fairhurst and David Ros. Continue reading
Accepted paper in the 39th IEEE Conference on Local Computer Networks (LCN)
Practical shared bottleneck detection has proved to be a difficult problem. We present a novel passive approach using efficient estimates of time and frequency domain summary statistics. The approach is not CPU nor network intensive, and has numerous potential applications in the Internet. Simulations and tests over the Internet and 3G cellular network show its … Continue reading
Accepted paper in The Nineteenth IEEE Symposium on Computers and Communications (IEEE ISCC)
Data-bundling is a useful technique that decreases the delivery delay of packet streams when they are transmitted over noisy channels and are subject to retransmission-based error control. In this paper, we investigate the packet delay statistics for a fully reliable selective repeat automatic repeat request (SR ARQ) where a data-bundling mechanism is employed. In more … Continue reading
Accepted paper in the Capacity Sharing Workshop (CSWS´14)
Today many end hosts are equipped with multiple interfaces. These interfaces can be utilized simultaneously by multipath protocols to pool resources of the links in an efficient way while also providing resilience to eventual link failures. However how to schedule the data segments over multiple links is a challenging problem, and highly influences the performance … Continue reading
Accepted paper in the Capacity Sharing Workshop (CSWS´14)
Congestion occurs at a bottleneck along an Internet path; multiple flows between the same sender and receiver pairs can benefit from using only a single congestion control instance when they share the same bot- tleneck. These benefits include the ability to control the rate allocation between flows and reduced overall delay (multiple congestion control in- … Continue reading
Accepted paper at Networking 2014
HTTP is a successful Internet technology on top of which a lot of the web resides. However, limitations with its current specification, i.e. HTTP/1.1, have encouraged some to look for the next generation of HTTP. In SPDY, Google has come up with such a proposal that has growing community acceptance, especially after being adopted by … Continue reading
Accepted paper in the Capacity Sharing Workshop (CSWS’13)
For many years Internet routers have been designed and benchmarked in ways that encourage the use of large buffers. When these buffers accumulate a large standing queue, this can lead to high network path latency. Two AQM algorithms: PIE and CoDel, have been recently proposed to reduce buffer latency by avoiding the drawbacks of previous … Continue reading
Accepted paper in the 9th Swedish National Computer Networking Workshop (SNCNW 2013)
The existence of excessively large and too filled net- work buffers, known as bufferbloat, has recently gained attention as a major performance problem for delay-sensitive applications. One important network scenario where bufferbloat may occur is cellular networks. This paper investigates the interaction between TCP congestion control and buffering in cellular networks. Extensive measurements have been … Continue reading
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