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If low-rate VoIP is transmitted over congested links, both the coding and the packet rate need to be adapted to achieve the best conversational quality: On an Ethernet network it is better to jointly change packet rate and speech coding rate; in WLAN networks it is sufficient to change the packet rate. We also study whether TCP-friendly rate control(More)
We present a novel mobility management scheme for the Long Term Evolution (LTE) networks, where a part of mobility management tasks is transferred from the mobile core network (i.e., Evolved Packet Core (EPC)) to the backhaul network. In this approach, a part of inter-eNodeB handovers of user equipments (UEs) are managed by control nodes in the backhaul in(More)
The virtual optical bus (VOB) is presented as a novel architecture for packet-based optical transport networks. The VOB is an evolutionary networking architecture based on the optical burst/packet switching (OBS/OPS) paradigm with a higher performance-in terms of packet loss rate and network throughput. The achieved gain comes at a cost of a marginal(More)
We study the design of virtual optical bus (VOB) network, which has been recently proposed as a packet-oriented all-optical solution for transport networks. Design of a VOB network consists of grouping all edge-to-edge flows in the network into clusters called VOBs and that has to be done with the objective of minimizing packet collision rate in the optical(More)
Currently there is no standard test collection for evaluation of Farsi information retrieval systems. In this paper we introduce Mahak, the first complete test collection generally available for evaluating Farsi information retrieval systems. We also discuss our construction process in detail. As a goal, we hope that Mahak will foster the development of(More)
This paper is an introduction to the "Future IKEA Catalogue", enclosed here as an example of a design fiction produced from a long standing industrial-academic collaboration. We introduce the catalogue here by discussing some of our experiences using design fiction` with companies and public sector bodies, giving some background to the catalogue and the(More)
Designing for interactive performances is challenging both in terms of technology design, and of understanding the interplay between technology, narration, and audience interactions. Bio-sensors and bodily tracking technologies afford new ways for artists to engage with audiences, and for audiences to become part of the artwork. Their deployment raises a(More)
In developing countries where Internet is not readily accessible and literacy sometimes low, Interactive Voice Response (IVR) systems have been shown to provide opportunities in a variety of civic activities. In this way, such systems can give the opportunity to more easily influence and participate in public affairs. However the lack of an efficient system(More)
Designing for mixed-reality performances is challenging both in terms of technology design, and in terms of understanding the interplay between technology, narration, and (the outcomes of) audience interactions. This complexity also stems from the variety of roles in the creative team often entailing technology designers, artists, directors, producers,(More)