Learn More
In this paper a new methodology to evaluate the protection performance of some existing mechanisms for establishing quality of service network paths with protection is presented. In order to evaluate the protection degree of a network, different components, such as protection parameters (packet loss and restoration time), or network parameters and(More)
Minimum interference routing schemes are good options for achieving fewer working-path request rejections. They improve the vast majority of the current QoS routing proposals. However, when backup paths are added there is no guarantee of achieving a similar performance. In this paper, we analyze the suitability of these routing schemes in protected network(More)
* This work has been partially supported by Special Action (Spanish Ministry Science and Technology)TIC2002-10150-E. AbstractIP based networks still do not have the required degree of reliability required by new multimedia services, achieving such reliability will be crucial in the success or failure of the new Internet generation. Most of existing schemes(More)
This paper focuses on QoS routing with protection in an MPLS network over an optical layer. In this multi-layer scenario each layer deploys its own fault management methods. A partially protected optical layer is proposed and the rest of the network is protected at the MPLS layer. New protection schemes that avoid protection duplications are proposed.(More)
We define new quality-of-service (QoS) routing schemes with protection in Internet Protocol (IP)/Multiprotocol Label Switching (MPLS) over optical networks. The novelty of the proposed routing schemes is the use of the knowledge of the logical links already protected by the optical layer. The logical topology defined by the optical layer is given and fixed,(More)
In this paper a novel methodology aimed at minimizing the probability of network failure and the failure impact (in terms of QoS degradation) while optimizing the resource consumption is introduced. A detailed study of MPLS recovery techniques and their GMPLS extensions are also presented. In this scenario, some features for reducing the failure impact and(More)
The paper presents a novel protection methodology for setting protected paths in a multiservice GMPLSbased network scenario. By applying the proposed methods, label switched paths can be protected to obtain small failure probabilities and fast failure recovery time. The presented methodology allows classifying the required protection level depending on the(More)
In the next generation optical internet, GMPLSbased IP-over-optical networks, ISPs will be required to support a wide variety of applications each having their own requirements. These requirements are contracted by means of the SLA. This paper describes a recovery framework that may be included in the SLA contract between ISP and customers in order to(More)
This paper presents a tool, for the analysis and regeneration of web contents, implemented through XML and Java. At the moment, the web content delivery from server to clients is carried out without taking into account clients’ characteristics. Heterogeneous and diverse characteristics, such as user’s preferences, different capacities of the client’s(More)
The next generation backbone networks, optical IP/MPLS networks, enable increasingly higher volumes of information to be transported. In this network architecture, a fiber failure can result in a loss of several terabits of data per second and leads to multiple failures in the upper network layer. Thus, the ability of the network to maintain an acceptable(More)