Energy Efficiency in TDMA-Based Next-Generation Passive Optical Access Networks
Next-generation Passive Optical Network (PON) has been considered in the past few years as a cost-effective broadband access technology. With the ever-increasing power saving concern, energy efficiency has been an important issue in its operations. In this paper, the authors propose a novel sleep time sizing and scheduling framework for the implementation of Green Bandwidth Allocation (GBA) in TDMA-PONs. The proposed framework leverages the batch-mode transmission feature of GBA to minimize the overhead due to frequent ONU on-off transitions. The optimal sleeping time sequence of each ONU is determined in every cycle without violating the maximum delay requirement.