Synchronous Optical Hierarchy
نویسندگان
چکیده
We introduce and describe the problems and challenges for the SOH (synchronous optical hierarchy), which is a form of WRON (wavelength routed optical network) where the signals occupy fractions of a wavelength through the use of timeslots in frames. Using timeslots for transparent optical networks will solve the capacity granularity problem which is present in the WRON. We define the problem of assigning wavelengths and timeslots to traffic demands by mathematical formulations in integer linear programming. By solving the integer linear programs for networks with static traffic assumptions we compare efficiency of SOH networks with WRONs measured in wavelength usage. Further, the influence of the timeslot and frame parameters describing SOH networks is studied. The effect of timeslot and wavelength conversion in SOH networks are also studied, as well as the presence of delay of timeslots.
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تاریخ انتشار 2007