Analysis of electronic buffers in optical packet/burst switched mesh networks

Evaluation of throughput and protection in optically switched metropolitan network architectures

“…1 is an MS-type (Manhattan Street) topology [9,10], consisting of 2×2 optical network nodes interconnected unidirectionally; with toroidal closure this ensures that an optical packet starting at a given node does not return to it. The indicated higher node is the one that allows connection to other sub-networks in a WDM environment, with details given in another study [5]. Figure 2 shows a diagram of the optical switching node, with (optical) add-drop functionalities.…”

“…The use of electronic buffering at the (external) client interface with the optical node is considered elsewhere [5], and does not affect the results of the present study.…”

“…We suppose that the present network proposal and analysis are best suited for application in the metro-access network range, implemented on a single wavelength. For larger distances or higher capacity demands, multiple wavelengths can be considered in a WDM network [5,7,8], with each wavelength having the internal OPS/OBS network dynamics as proposed here.…”

“…For core optical networks, WDM solutions are well established. However, at the metropolitan access level, a tendency to use optical packets for transport and switching following today's (electronic) packet-based optical networks environment are being proposed and tested [1][2][3][4][5], carrying high bandwidths and running over single wavelengths.…”

Traffic analysis and network protection in photonic switched optical metro-access networks

“…These node architectures allow for the use of deflection routing (DR) as the protocol to resolve contentions and avoid collisions [5][8], with the advantage of no need for buffering at the optical layer, which contributes to cost reduction and much lower latency. Electronic buffering at the (external) client interface of the optical node is considered elsewhere [6], and does not affect the results of the present work. An optical packet/burst arriving at the optical node blocks the switch to its preferred route; another packet/burst arriving within the same blocking duration will be deflected to the available outport.…”