Adaptive Scheduling Mechanism with Variable Bit Rate Traffic in EPON

Abstract

AbstractIn Ethernet Passive Optical Network, with Load Adaptive Polling Sequence Arrangement (LASA) method, the Optical Line Terminal assigns delayed polling sequence arrangement for a set of Optical Network Units (ONUs) over the cycles. This arrangement has resulted in identical cycle time with Constant Bit Rate traffic. In addition, the LASA through its arrangement provides sleep mode to different set of ONUs over the cycles and provides maximum sleep time for ONUs. With these advantages of LASA and keeping the scenario with different cycle times for the ONUs, in this work, the Variable Bit Rate (VBR) based LASA method is analyzed. The variation in the cycle times has resulted in two cases and in each case by varying the maximum (Mxi) and the minimum (Mni) idle times, a maximum of 40.6% reduction in power consumption is observed in LASA with VBR scheduling method than traditional one.