Andreas Schieder

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1 Introduction In today's wired and wireless networks, the trends in networking technology very much point to a dominance of Internet technology with all its flavours. IP is the common " lingua franca " to enable the exchange of data across various networks. There is, however, an increasing divergence in the network control layer: different control(More)
The General Packet Radio Service (GPRS) is currently being standardized by the European Telecommunications Standard Institute (ETSI) to extend the services provided by the Global System for Mobile Communications (GSM). GPRS is dedicated to support packet-oriented traffic, e.g. Internet traffic. Packet oriented transmission is by nature better suited to(More)
In this paper we discuss the applicability of GPRS and EGPRS for the transmission of voice packets in an end-toend packet switched scenario. We assume typical Voice over IP (VoIP) applications spanning between a fixed and a mobile terminal. As the transmission delay of the voice packets has most impact on the perceived Quality of Service (QoS), it has been(More)
Providing end-to-end communication in heterogeneous internetworking environments is a challenge. Two fundamental problems are bridging between different internetworking technologies and hiding of network complexity and differences from both applications and application developers. This paper presents abstraction and naming mechanisms that address these(More)
<i>Ambient Networks</i> interconnect independent realms that may use different local network technologies and may belong to different administrative or legal entities. At the core of these advanced internetworking concepts is a flexible naming architecture based on dynamic indirections between names, addresses and identities. This paper gives an overview of(More)
This article presents new concepts for network-supported media delivery in mobile networks. Automatic composition and merging of networks are central parts of these concepts. Media delivery is no longer an end-to-end service that only uses the network as an IP transport. Instead, these concepts create a service-aware network and provide customized delivery(More)
Several different internetworking architectures are being discussed within the Ambient Networks (AN) project. This paper describes the Overlay architecture. Its name is derived from the use of an overlay control plane that allows for internetworking between different network technologies, as well as for control of functionality that is today found in(More)
Description: Distribution of multimedia content is expected to take a leading role in the service portfolio of future communication networks. People are assumed to require access to multimedia content of various nature and format through different end devices and access networks. Especially within the context of cooperative networks, multimedia content(More)
This paper provides a comparative overview of the candidates being discussed as successors for current mobile broadband data networking technologies. The comparison is based on typical network operator requirements that are summarized under the term &#x201C;Next Generation Mobile Networks&#x201D; (NGMN) and governed by a comprehensive approach to technology(More)
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