7 research outputs found
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