The LHCb experiment is dedicated to precision measurements of CP violation and rare decays of B hadrons at the Large Hadron Collider (LHC) at CERN (Geneva). The initial configuration and expected performance of the detector and associated systems, as established by test beam measurements and simulation studies, is described.

In this article, a new model to simulate different failure propagation scenarios in GMPLS-based networks is proposed. Several types of failures and malfunctions may spread along the network following different patterns (hardware failures, natural disasters, accidents, configuration errors, viruses, software bugs, etc.). The current literature presents several models for the spreading of failures in general networks. In communication networks, a failure affects not only nodes but also the connections passing through those nodes. The model in this article takes into account GMPLS node failures, affecting both data and control planes. The model is tested by simulation using different types of network topologies. In addition, a new method for the classification of network robustness is also introducedThis work is partially supported by Spanish Ministry of Science and Innovation project TEC 2009-10724 and MTM 200806349-C03, and by the Generalitat de Catalunya research support program SGR-1202 and SGR-345

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Abstract-IP 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 for QoS routing do not take into consideration parameters concerning the quality of the protection, such as packet loss or restoration time.In this paper, we define a new paradigm to develop new protection strategies for building reliable MPLS networks, based on what we have called the Network Protection Degree (NPD). This NPD consists of an a priori evaluation, the Failure Sensibility Degree (FSD), which provides the failure probability and an a posteriori evaluation, the Failure Impact Degree (FID), to determine the impact on the network in case of failure.Having mathematical formulated these components, we point out the most relevant components. Experimental results demonstrate the benefits of the utilization of the NPD, when used to enhance some current QoS routing algorithms to offer a certain degree of protection.