Internet Telephony can be defined as real-time voice or multimedia communications over packet switched networks, including the Internet. The advent of third generation, wireless telecommunications networks will make it much more popular by adding the wireless dimension. Millions of end-users will access Internet Telephony services using wireless devices. These end-users will be highly mobile an...

In this paper we discuss the use of the Session Initiation Protocol (SIP) as part of the control plane of an application aware Optical Burst Switching (OBS) network, able to support Grid computing applications. The paper presents the possible alternatives for the architecture of such control plane and reports of an experiment in an existing OBS test-bed where this approach was successfully test...

Mobile users have not been able to exploit spatio-temporal differences between individual mobile networks operators for a variety of reasons. End user network switching and multihoming are two promising mechanisms that could allow such exploitation. However these mechanisms have not been thoroughly explored at a general system level with QoE metrics. Therefore, in this work we analyze these mec...

Article history: Received 18 February 2015 Received in revised form 10 July 2015 Accepted 4 September 2015 Available online 25 September 2015

Abstract. A class of stochastic individual-based models, written in terms of coupled velocity jump processes, is presented and analysed. This modelling approach incorporates recent experimental findings on behaviour of locusts. It exhibits nontrivial dynamics with a “phase change” behaviour and recovers the observed group directional switching. Estimates of the expected switching times, in term...

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