This paper investigates the topic of QoS provisioning both at the application and network level in an evolutionary scenario consisting of a UMTS multi-tier platform enhanced by a satellite coverage level and suitably thought for supporting multimedia traffic. In this “next-generation” scenario the main objective is the introduction of a distributed QoS control mechanism, with Middleware functio...

1 This work has been partially supported by a grant from the German Ministry for Research and Education (BMB+F) within the project “Communication and Mobility by Cellular Advanced Radio (COMCAR)” and by the European Commission within the IST project “Dynamic Radio for IP-Services in Vehicular Environments (DRiVE)”. Abstract Future wireless communication systems will be characterised by an integ...

Providing support for legacy applications is a crucial component of many overlay networks, as it allows end-users to instantly benefit from the functionality introduced by these overlays. This paper presents the design and implementation of a proxy-based solution to support legacy applications in the context of the i3 overlay [24]. The proxy design relies on an address virtualization technique ...

Synchronization of multiple data streams in time has been recognized as a significant requirement of future multimedia applications utilizing broadband communication technology. Although this requirement has been approached for such single channel media as packetized audio and video, a general solution has not been identified for the provision of synchronization of real-time stream traffic as w...

The need to control information flow to a restricted set of accepted protocols arises from the vulnerabilities that may come from any protocol. Reducing the acceptable protocols to a small set of well-tested standard protocols will reduce the attack surface and provide high confidence in selected communications. These protocols are restricted to specific ports or addresses in the receiving web ...

The networking of active and passive safety (APIA) is the fundamental basis for comprehensive vehicle safety. Situation-relevant information relating to driver reactions, vehicle behaviour and traffic environment are fed into a crash probability calculator, which continually assesses the current crash risk and intervenes when necessary with appropriate measures to avoid a crash and reduce poten...

some formulations of drug in adhesive transdermal drug delivery systems ()tddss)( with different functional and non-functional acrylic pressure sensitive adhesives psas)( were prepared. for this purpose fentanyl was used as a drug component. the effects of psas type on skin permeation and in vitro drug release from devices were evaluated using hydrodynamically well-characterized chien permeatio...

The air/ground voice communication between air traffic controller and aircraft does not provide any means of automatic speaker identification and is therefore susceptible to call sign confusion and originator ambiguity. In the near future the analogue VHF radio will not disappear from avionic communications. With an add-on to the analogue radio it is possible to automatically detect the origina...

MetaNet is a network management system that provides end-to-end communication services with QoS and communication planning support for mission critical applications. It supports immediate and advance resource reservation, and provides information on immediate and future available communication capacity taking into account network configuration and traffic. MetaNet supports these services over m...

The paradigm of service-oriented architectures (SOA) is by now accepted for application integration and in widespread use. As an underlying key-technology of cloud computing and because of unresolved issues during operation and maintenance it remains a hot topic. SOA encapsulates business functionality in services, combining aspects from both the business and infrastructure level. The reuse of ...