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In this paper, Principal Component Analysis (PCA) techniques are introduced in the context of Cognitive Radio to enhance the Spectrum Sensing performance. PCA step increases the SNR of the Primary User's signal and, consequently, enhances the Spectrum Sensing performance. We applied PCA as a combination scheme of a multi-antenna Cognitive Radio system. Analytic results will be presented to show the...
In this paper, we present a new detector for cognitive radio system based on the Canonical Correlation Significance Test (CCST). Unlike existing CCST approaches, which can only be applied on Multi-Antenna System (MAS), our algorithm can be extended for both Single Antenna System (SAS) and MAS. For SAS, the proposed algorithm exploits the time diversity of cyclostationary signals in order to detect...
Spectrum Sensing problem is a major problem in any smart radio transmission system (i.e. Cognitive or Smart Radio). This manuscript deals with this problem by proposing two major contributions: At first, a new contribution, consists on a new developing of setting of the comparison threshold basing on new decision criterion. In second contribution we use the Waveform techniques in order to detect the...
This paper proposes fast reroute extensions to RSVP-TE in order to support the protection of multipoint to multipoint (MP2MP) MPLS TE-tunnels. To protect an element (link or node) of a primary MP2MP TE-tunnel, we propose to use an MP2MP bypass TE-tunnel connecting a set of nodes around the protected element. During failure the primary MP2MP TE-tunnel is encapsulated into the MP2MP bypass TE-tunnel...
The MPLS-TE technology, relying on the signaling protocol RSVP-TE, ensures traffic engineering (TE) features for point-to-point (P2P) and point-to-multipoint (P2MP) applications with strong bandwidth and availability needs. This paper defines the concept of multi-point to multi-point (MP2MP) TE-LSP that connects a group of nodes called leaves, acting as senders and/or receivers, with potentially distinct...
This paper proposes fast reroute extensions to RSVP-TE in order to support the protection of multipoint to multipoint (MP2MP) MPLS TE-tunnels. To protect an element (link or node) of a primary MP2MP TE-tunnel, we propose to use an MP2MP bypass TE-tunnel connecting a set of nodes around the protected element. During failure the primary MP2MP TE-tunnel is encapsulated into the MP2MP bypass TE-tunnel...
Resource ReSerVation Protocol-Traffic Engineering (RSVP-TE), and Label Distribution Protocol (LDP) may be used to set up Point to Multi Point (P2MP) trees in MPLS. RSVP-TE performs better in optimizing network resources, while LDP is simpler but has no guarantee on resource optimization. This paper presents a comparative study between RSVP-TE and LDP in regards of resource optimization and the resulting...
Scheutzow et al. have presented an analytical model to evaluate the capacity of the unidirectional and bidirectional TT-FR packet-switched ring network under multicast traffic (i.e., a ring where each node is equipped with one tuned transmitter, TT, and one fixed receiver, FR). In this paper, we investigate the impact of multicast on the access delay of the bidirectional TT-FR, by means of an analytical...
A simple analytical model is presented to evaluate the effective multicast capacity of unidirectional multi-channel slotted ring networks where each node is equipped with one fixed or tuned transmitter and an array of fixed receivers (i.e., FT-FR w and TT-FR w systems). Furthermore, an approximate approach is developed to compare the mean access delay of a multicast packet between these networks and...
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