Analysis of the blocking performance of hybrid OCDM‐WDM transport networks

Abstract

and C for the uniform line and right-angled bend, respectively, for frequencies, namely, 0.7 and 2.1 GHz.Note that as one moves away from the discontinuity, the L and C values naturally tend to those corresponding to the uniform line parameters. The variations of L and C versus frequency are consistent, as the predicted value of Z 0 ϭ ͌ L/C is 49.3°at both of the frequencies mentioned above, which, in turn, agrees well with the Z 0 plot shown in Figure 3. The glitch in L distribution that appears in the MoM solution [2] is not observed here, because it is believed to be a numerical artifact appearing in that solution. CONCLUSIONA simple, FDTD-based approach for extracting the parameters of interconnect transmission lines has been introduced. The validity of the method has been demonstrated by analyzing the right-angled bend. The method is straightforward and it enables the desired frequency characteristics to be computed in a single run. 1. J. Zhao and Z.F. Li, A time-domain full-wave extraction method of frequency-dependent equivalent circuit parameters of multiconductor interconnection lines

Performance analysis of optical code switching router

“…This kind of router is applicable to optimise design of hybrid WDM/OCDM networks and should increase network capacity and flexibility due to its capability of in a straightforward manner switching and routing optical coded information packets, defined in optical code paths. This architecture is a modified (upgrade) scheme of previous proposals in the literature [7][8][9]12]. Our results indicate that our solution is useful in showing the effects of the optimum threshold level in decreasing the BER in the decorrelation phase that affects the PER at the router output.…”

“…In this architecture no wavelength conversion is considered, then it is not possible to switch a coded channel on one wavelength to any other wavelength as the architectures studied in other works [7,8,9].…”

Effects of multiple access interference and PMD on optical code lightpaths

“…This technology is compatible with generalized multiprotocol label switching (GMPLS) [2], and could increase the wavelengthlimited granularity of WDM networks [3]. The optical code path strategy utilizes the OCDM multiplexing methods to establish virtual paths based on optical orthogonal codes.…”

“…In a common channel the interference that may arise between different code-users is known as multiple access interference (MAI) and can limit the number of codeusers utilizing the channel simultaneously. The performance of networks that utilizing OCDM code paths was analyzed in [1], [3], [4] considering the codes like a new degree of freedom, that could be exploited to improve the network performance, but MAI effects were not considered. Considering the MAI effects [5], it is important to define the maximum number of code-users per wavelength in code/wavelength routed networks, and then to choose the code parameters.…”

“…Considering the MAI effects [5], it is important to define the maximum number of code-users per wavelength in code/wavelength routed networks, and then to choose the code parameters. Also, a major physical impairment that must be considered in optical networks is the polarization mode dispersion (PMD), which in contrast to chromatic dispersion is difficult to accurately determine and compensate, because of its dynamic nature [3]. The effects of PMD in optical code paths were considered in [6], where it was demonstrated that PMD effects have significant impact in code parameters.…”