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Survivability Analysis of Next-Generation Passive Optical Networks and Fiber-Wireless Access Networks

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3 Author(s)
Ghazisaidi, N. ; Opt. Zeitgeist Lab., Inst. Nat. de la Rech. Sci. (INRS), Montreal, QC, Canada ; Scheutzow, M. ; Maier, M.

Passive optical networks (PONs) are currently evolving into next-generation PONs (NG-PONs) which aim at achieving higher data rates, wavelength channel counts, number of optical network units (ONUs), and extended coverage compared to their conventional counterparts. Due to the increased number of stages and ONUs, NG-PONs face significant challenges to provide the same level of survivability like conventional PONs without exceeding the budget constraints of cost-sensitive access networks. Toward this end, partial optical protection, in combination with interconnecting a subset of ONUs through a wireless mesh network (WMN) front-end, are promising solutions to render NG-PONs survivable in a cost-effective manner. In this paper, we present a probabilistic analysis of the survivability of NG-PONs and hybrid fiber-wireless (FiWi) access networks, taking both optical and wireless protection into account. In addition, we propose different selection schemes to wirelessly upgrade a subset of ONUs, and investigate their performance for a wide range of fiber link failure scenarios and different NG-PON topologies.

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Reliability, IEEE Transactions on  (Volume:60 ,  Issue: 2 )