User migration in Time and Wavelength Division Multiplexed PON (TWDM-PON)

Abstract

Power consumption in our communication networks is increasing rapidly, making energy efficiency one of the key considerations in developing next generation passive optical networks state 2 (NG-PON2). Considering the fact that wavelength utilization is quite low for most of the time due to the bursty nature of the traffic and the fluctuation of the bandwidth demand, we propose a novel user migration mechanism for the Time and Wavelength Division Multiplexed PON (TWDM-PON). With the proposed migration mechanism, one can minimize the active wavelength up to theoretical lower bound under typical ONU online profiles. We investigate how the user Service Level Agreement (SLA) is affected by the migration interval and migration delay. Our results show that 99.999% SLA can be guaranteed when the migration delay is less than 10 milliseconds.