ONU Buffer Elimination for Power Savings in Passive Optical Networks
In this paper, the authors examine the effects of a power saving scheme in Passive Optical Networks (PON). Buffers in network equipment have been a cause of concern since they consume significant power. In a PON, the Optical Network Unit (ONU) buffers client node packets before forwarding to the Optical Line Terminal (OLT). They propose a scheme that reduces or eliminates buffers in the ONU thereby providing reduction in power of around 9%. However, this can potentially increase the packet delay due to buffering at the client node. This paper analyzes the delay performance using simulated and theoretical models.