An analytical model for all-optical packet switching networks with finite FDL buffers

Chou, Kun Hsien; Lin, Woei

doi:10.1007/s11107-013-0398-y

Cited by 1 publication

(2 citation statements)

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“…Note that this expression for the LP is tightly related to the one of continuous time (7). To see this, we rewrite the continuous-time expression for ρ = 1 as LP = (1 − ρ)ρ e µτ e −λτ − ρ 2 , ρ = 1 .…”

Section: Discussionmentioning

confidence: 99%

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Heuristic performance model of optical buffers for variable length packets

et al. 2013

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Optical switching (Optical Packet Switching, Optical Burst Switching, and others) provides alternatives to the current switching in backbone networks. To switch optically, also packet buffering is to be done optically, by means of Fiber Delay Lines (FDLs). Characteristic of the resulting optical buffer is the quantization of possible delays: only delays equal to the length of one of the FDLs can be realized.An important design challenge is the optimization of the delay line lengths for minimal packet loss. To this end, we propose a heuristic based on two existing queueing models: one with quantization and one with impatience. Combined, these models yield an accurate performance modeling heuristic. A key advantage of this heuristic is that it translates the optical buffer problem into two well-known queueing problems, with accurate performance expressions available in the literature. This paper presents the heuristic in detail, together with several figures, comparing the heuristic's output to existing approaches, validating its high accuracy.

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Section: Discussionmentioning

confidence: 99%

“…These can be used in a feed-forward setup (as opposed to a feed-back setup, see, e.g., [7]), where each line provides the delay that corresponds to its length. The lengths in a feed-forward setup are usually assumed multiples of a basic delay unit called granularity [8].…”

Section: Introductionmentioning

confidence: 99%