Optical network packet error rate due to physical layer coding

Abstract

Abstract-A physical layer coding scheme is designed to make optimal use of the available physical link, providing functionality to higher components in the network stack. This paper presents results of an exploration of the errors observed when an optical Gigabit Ethernet link is subject to attenuation. The results show that some data symbols suffer from a far higher probability of error than others. This effect is caused by an interaction between the physical layer and the 8B/10B block coding scheme. We illustrate how the application of a scrambler, performing datawhitening, restores content-independent uniformity of packetloss. We also note the implications of our work for other (N,K) block-coded systems and discuss how this effect will manifest itself in a scrambler-based system. A conjecture is made that there is a need to build converged systems, with the combinations of physical, data-link, and network layers optimised to interact correctly. In the mean time, what will become increasingly necessary is both an identification of the potential for failure and the need to plan around it.

Relation of OSNR and PLR for nonintrusive fault detection in all-optical IP-Ethernet-WDM networks

“…Future work involves measuring the OSNR and PLR in a real all-optical network [13] to compare the analytical OSNR-PLR relation derived in this paper to the experimental measurement of these performance parameters. This will allow the experimental verification of the analytical relation derived in this work as well as the empirical assessment of some open questions, e.g., whether physical-layer coding has an impact on the BER [22].…”

Multicast traffic filtering for sampled value process bus networks

“…An increase in bit rate requires a proportional increase in transmitter power for the bit error rate (BER) to remain the same, and non-linearity in glass fibre optic cable mean there is a limit to the optical power that can be applied [21]. As a result Fast Ethernet has advantages over Gigabit Ethernet for long cable runs in substation switchyards.…”

Evaluation of BER in Optical Packet Switching Using Various Coding Schemes

“…The increase in bandwidth necessitates proportional increase in power of the transmitter and it is constrained by the non-linearity present in the fiber. In order to function at low power levels, we stress on coding at the bottom most layer [1].…”