In this study, we propose a novel spectrum and core allocation scheme that incorporates both intra-core physical layer impairments and inter-core crosstalk. We demonstrate that accounting for the latter increases spectral efficiency by at least 50% when crosstalk is significant.

It has been widely recognized that physical-layer impairments, including power losses, must be taken into account when optical connections are routed in transparent networks. We study the problem of constructing light-trees under optical-layer power budget constraints, with a focus on algorithms that can guarantee a certain level of quality for the signals received by the destination nodes. We ...

The continuous growth of traffic demand driven by the brisk increase in number of Internet users and emerging online services creates new challenges for communication networks. The latest advances in Wavelength Division Multiplexing (WDM) technology make it possible to build Transparent Optical Networks (TONs) which are expected to be able to satisfy this rapidly growing capacity demand. Moreov...

Current implementations of GMPLS protocol suite are unaware of optical signal physical impairments and quality of transmission. In this paper, we present an overview of different approaches for implementing QoT estimation and QoT measurements in transparent networks and for encompassing sparse regeneration information in translucent networks.

The Internet traffic is constantly growth and the applications of type unicast/multicast with different Quality of Service (QoS) requirements. The increase of internet traffic over the last couple of years is well known (the rate of increase is reported to be 60% to 100% per year (Malik, 2011). Applications like multicast are used more frequently than ever (for example HDTV, videoconferencing, ...

In this paper, we study physical layer security (PLS) of wireless networks in presence of one eavesdropper. Assume that the channel state information (CSI) of the eavesdropper cannot be obtained at the transmitter, such as CSI can be then estimated through the CSI of a torch node. In addition, a practical issue of wireless nodes, i.e., hardware impairment (HI), is considered at the source node ...

S.A. Charles, J.K. Pollard and T.H. Whittaker 1. Telecommunications Research Group, EE Dept, UCL, Torrington Place, London WC1E 7JE 2. Cambridge Consultants Ltd, Milton Road, Cambridge CB4 0DW [email protected] ABSTRACT This paper investigates the application of the ETSI HIPERLAN/2 and IEEE 802.11a physical layer standards to the wireless local loop. Simulation results are presented. A sim...

Latest advances in Wavelength Division Multiplexing (WDM) technology make it possible to build all-optical transparent networks, which are considered to be able to satisfy the rapidly growing capacity demand. However, in a transparent WDM network the optical signal transmitted from a source to a destination node might be degraded due to physical layer impairments induced by transmission through...