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O. Bonaventure,
P. Trimintzios,
G. Pavlou,
B. Quoitin,
A. Azcorra,
M. Bagnulo,
P. Flegkas,
A. Garcia-Martinez,
P. Georgatsos,
L. Georgiadis, C. Jacquenet,
L. Swinnen,
S. Tandel,
S. Uhlig
[show abstract]
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ABSTRACT: Traffic engineering encompasses a set of techniques that can be used to control the flow of traffic in data networks. We discuss
several of those techniques that have been developed during the last few years. Some techniques are focused on pure IP networks
while others have been designed with emerging technologies for scalable Quality of Service (QoS) such as Differentiated Services
and MPLS in mind. We first discuss traffic engineering techniques inside a single domain. We show that by using a non-linear
programming formulation of the traffic engineering problem it is possible to meet the requirements of demanding customer traffic,
while optimising the use of network resources, through the means of an automated provisioning system. We also extend the functionality
of the traffic engineering system through policies. In the following, we discuss the techniques that can be used to control
the flow of packets between domains. First, we briefly describe interdomain routing and the Border Gateway Protocol (BGP).
Second, we summarise the characteristics of interdomain traffic based on measurements with two different Internet Service
Providers. We show by simulations the limitations of several BGP-based traffic engineering techniques that are currently used
on the Internet. Then, we discuss the utilisation of BGP to exchange QoS information between domains by using the QOS_NLRI
attribute to allow BGP to select more optimum paths. Finally, we consider the multi-homing problem and analyse the current
proposed IPv6 multi-homing solutions are analysed along with their impact on communication quality.
10/2003: pages 118-179;
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[show abstract]
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ABSTRACT: IP Differentiated Services is widely seen as the framework to provide Quality of Service (QoS) in the Internet in a scalable fashion. However many issues have still not been fully addressed, such as: the way Per-Hop Behaviours can be combined to provide end-to-end services; the specification of admission control and resource reservation mechanisms; and the role of management plane functionality and its integration with the control and data planes. This paper presents the Service Management aspects of an integrated control and management architecture for supporting end-to-end QoS-based IP services in Next Generation Networks. It introduces a two-phased approach for service negotiation, namely, service subscription followed by service invocation, and describes the interworking between service and resource management based on the concept of a resource provisioning cycle.
06/2002;
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[show abstract]
[hide abstract]
ABSTRACT: IP Differentiated Services is widely seen as the framework to provide quality of service (QoS) in the Internet in a scalable fashion. However many issues have still not been fully addressed, such as: the way per-hop behaviours can be combined to provide end-to-end services; the specification of admission control and resource reservation mechanisms; and the role of management plane functionality and its integration with the control and data planes. This paper presents the service management aspects of an integrated control and management architecture for supporting end-to-end QoS-based IP services in next generation networks. It introduces a two-phased approach for service negotiation, namely, service subscription followed by service invocation, and describes the interworking between service and resource management based on the concept of a resource provisioning cycle.
Network Operations and Management Symposium, 2002. NOMS 2002. 2002 IEEE/IFIP; 02/2002
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P. Trimintzios,
I. Andrikopoulos,
G. Pavlou,
P. Flegkas,
D. Griffin,
P. Georgatsos,
D. Goderis,
Y. T'Joens,
L. Georgiadis, C. Jacquenet,
R. Egan
[show abstract]
[hide abstract]
ABSTRACT: As the Internet evolves toward the global multiservice network of
the future, a key consideration is support for services with guaranteed
quality of service. The proposed differentiated services framework is
seen as the key technology to achieve this. DiffServ currently
concentrates on control/data plane mechanisms to support QoS, but also
recognizes the need for management plane aspects through the bandwidth
broker. In this article we propose a model and architectural framework
for supporting DiffServ-based end-to-end QoS in the Internet, assuming
underlying MPLS-based explicit routed paths. The proposed integrated
management and control architecture will allow providers to offer both
quantitative and qualitative services while optimizing the use of
underlying network resources
IEEE Communications Magazine 06/2001; · 3.79 Impact Factor
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P. Trimintzios,
I. Andrikopoulos,
G. Pavlou,
C.F. Cavalcanti,
P. Georgatsos,
D. Griffin, C. Jacquenet,
D. Goderis,
Y. T'Joens,
L. Georgiadis,
R. Egan,
G. Memenios
[show abstract]
[hide abstract]
ABSTRACT: As the Internet evolves, a key consideration is support for
services with guaranteed quality of service (QoS). The proposed
differentiated services (DiffServ) framework, which supports aggregate
traffic classes, is seen as the key technology to achieve this. DiffServ
currently concentrates on control/data plane mechanisms to support QoS
but also recognises the need for management plane aspects through the
bandwidth broker (BB). In this paper we propose a model and
architectural framework for supporting end-to-end QoS in the Internet
through a combination of both management and control/data plane aspects.
Within the network we consider control mechanisms for traffic
engineering (TE) based both on explicitly routed paths and on pure
node-by-node layer 3 routing. Management aspects include customer
interfacing for service level specification (SLS) negotiation, network
dimensioning, traffic forecasting and dynamic resource and routing
management. All these are policy-driven in order to allow for the
specification of high-level management directives. Many of the
functional blocks of our architectural model are also features of BBs,
the main difference being that a BB is seen as driven purely by customer
requests whereas, in our approach, TE functions are continually aiming
at optimising the network configuration and its performance. As such, we
substantiate the notion of the BB and propose an integrated management
and control architecture that will allow providers to offer both
qualitative and quantitative QoS-based services while optimising the use
of underlying network resources
Integrated Network Management Proceedings, 2001 IEEE/IFIP International Symposium on; 02/2001
