End-to-end QoS architecture for 4G scenarios

This paper describes the QoS architecture and the corresponding QoS signalling protocols to be developed inside the IST project Daidalos. We address the main results achieved in terms of the definition of the QoS components and its interfaces, the description of the application and network services, definition of the signalling scenarios for the integration of the QoS signalling with the application signalling and with mobility approaches, and specification of the intra- and inter- domain QoS control approaches. We also describe the QoS management of the system, through the Policy–based Management System, and a Real-time Network Monitoring system able to aid in admission control with the results of active and passive measurements. All the elements, interfaces and functionalities take into account multicast services and inherent broadcast networks

TCP-friendly Bandwidth-on-Demand Scheme for Satellite Networks

The Bandwidth-on-Demand (BoD) issue is becoming crucial in the next generation satellite systems, since it addresses the problem of providing the data traffic with the access to the network while guaranteeing a high exploitation of the valuable satellite bandwidth. This paper presents BoD scheme specifically tailored for transporting TCP traffic over geostationary satellite networks. The scheme uses an equation-based algorithm for TCP burst prediction coupled with a control-theoretic scheme to provide the necessary robustness to prediction errors and to network congestions. Comprehensive simulation results shows the effectiveness of the proposed BoD scheme. The work underlying this paper has been performed in the context of the SATIP6 project belonging to the fifth framework Information Society and Technology (IST) programme of the European Union

A control theoretic approach to DVB-H bandwidth management using content adaptation node

Broadcast networks based on IP multicast are quickly growing due to the next commercialization of DVBH services. The objective of the work presented in this paper is to outline the potentiality of the control of content adaptation nodes and transrater, exploiting IP layer measurements and the access node, to optimize the resource management. The followed approach is based on controltheoretic methodologies; in particular, the Smith Predictor scheme is proposed. Numerical simulations validated the performance of the system

Support for Multicast-Aware QoS in NGNs: the DAIDALOS Approach

Spreading of traditional and novel broadcast applications in the Internet, such as messaging and video conferencing has, in the last few years, considerably increased the interest in support for broadcast applications within research community. In general broadcast poses several challenges at network and application/session levels ranging from efficient use of bandwidth, reliability of content delivery to security and authentication, spontaneous activation of multiparty sessions, and flexible support for renegotiation of session parameters. In addition, when considering the Internet, support for broadcast has to be engineered so as to assure full integration of broadcast technology in a heterogeneous infrastructure and high-scalability with respect to the number of potential users of a multicast session. State-ofthe-art of broadcast technology comprises a vast number of proposed protocols, algorithms and network technologies with native-support for broadcast. This paper presents the approach followed by the DAIDALOS project, sponsored by the EU within the Sixth framework Research Programme, for multicast-aware QoS in a heterogeneous end-to-end TCP/IP infrastructure

Modelling of integrated broadcast and unicast networks with content adaptation support

Convergence of one-way broadcast and bidirectional unicast networks can be leveraged for efficient delivery of on-demand broadband contents in future telecommunication systems. In this work we are modelling an integrated broadcast and unicast bidirectional network with transcoding capabilities and addressing optimization of on demand content delivery under alternative approaches. Two alternatives are considered which maximize the efficiency of the integrated network providing a compromise between the efficiency and QoS respectively. The approaches are validated through simulations and assessed again a broadcast network without transcoding facilities

Access Control with QoS Provision in the SATIP6 Project

This paper deals with QoS provision for broadband access via TCP/IP over a DVB/RCS satellite network. The paper presents both the satellite terminal proposed algorithms and the simplified ones, required for the actual implementation in the SATIP6 demonstrator. Both of them are organized into two main modules, the Traffic Control and Bandwidth on Demand (BoD) modules, operating jointly with the aim of providing proper regulation and differentiation of the IP flows and efficient utilization of the uplink bandwidth. OPNET simulations were used as analysis tool, in order to compare their performances in terms of queuing delay and link utilization efficiency