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Due to the increasing deployment of conversational real-time applications like VoIP and videoconferencing, the Internet is today facing new challenges. Low end-to-end delay is a vital QoS requirement for these applications, and the best effort Internet architecture does not support this natively. The delay and packet loss statistics are directly coupled to(More)
The integration of communication and computation technologies, the availability of pocket mobile computers, and the widespread penetration of mobile radio access networks will enable a range of new context-aware mobile services to be offered to the users. Research on methods and technologies for the development of such services requires the involvement of(More)
The NNN-UTS project (Nordområdenes Nye Nervesystem – Undervanns Trådløst Sensornettverk) has aimed to develop wireless network technology for underwater sensor networks, employing acoustic communication to realize wireless functionality in water. Research and development has been carried out in 2006-2009. A final sea(More)
This paper presents an Active Queue Management (AQM) design based on a Proportional control system, which is shown to provide good conditions for rate adaptive real-time applications. Simulation results show that rate adaptive media sources over RTP/UDP achieve an aggregate core link utilization in the region 97.5–99.9%, with controlled delay and stochastic(More)
Abstract: This paper compares the performance of two algorithms for congestion control of streaming media. The two methods are Datagram Congestion Control Protocol (DCCP) over RED, and a solution based on an Active Queue Management (AQM) combined with explicit feedback of congestion level experienced at routers. DCCP relies on binary congestion metrics,(More)
Routing for low latency underwater acoustic network-communication is investigated. The application is monitoring of ice-threats to offshore operations in the Arctic to provide warnings that enable operators to react to such threats. The scenario produces relatively high traffic load, and the network should favour low delay and adequate reliability rather(More)
Modern patient monitoring systems are designed to put the individual into the centre of the system architecture. In this paradigm, the patient is seen as a source of health-relevant data that are processed and transferred. Patient monitoring systems are used in health care enterprises as well as in paramedic, mobile, and home situations to foster ambient(More)
This paper shows the design and performance of an AQM (Active Queue Management) enabled router. The design is based on a classical proportional control system. The application of such a router is to enhance streaming media over IP performance by avoiding bursty packet drop situations, control the router queue delay, and balancing packet drop, delay, and(More)
In order to meet the demand for increased capacity in wireless networks, incorporating femtocells within the coverage of macrocells constitutes one of the strategies that currently receives most attention from both industry and academia. Femtocells may either be part of a HetNet as standardised within 3GPP, or constitute the secondary system in cognitive(More)