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Heuristic polling sequence to enhance sleep count of EPON

Frontiers of Optoelectronics 2019年第4期12卷 422-432页

作者： bhargav ram rayapati Nakkeeran RANGASWAMY Department of Electronics Engineering Pondicherry UniversityPondicherry 605014India

Next-generation passive optical networks(PONs)demand power conservation to create a green environment.A reduction in power consumption of the traditional Ethernet passive optical network(EPON)can be achieved by increasing the sleep count in optical network units(ONUs).In this paper,this is accomplished by introducing a first-in-last-out(FILO)polling sequence in the place of a fixed polling sequence to increase the number of ONUs entering sleep mode(sleep count).In a fixed polling sequence,the optical line terminal(OLT)allocates idle time to the ONUs based on the overall load of the *** leads to a situation that whenever the idle time does not meet the wakeup time threshold of sleep mode,the ONUs are put into doze/active mode,which consumes more *** the FILO polling sequence,the first polled ONU in the current cycle is made to be polled last in the following *** continues in this way,and by this rearrangement,the idle time of delayed poll ONUs increases;hence,it helps to reduce the power ***,a modified load adaptive sequence arrangement(MLASA)method is suggested,where the ONUs are categorized into doze ONUs and sleep ONUs.A numerical simulation of the FILO polling sequence with a vertical cavity surface emitting laser(VCSEL)ONU shows a maximum reduction in power consumption of 15.5 W and a 20%improvement in energy savings compared with the traditional fixed polling *** MLASA method results in better power consumption with minimum delay than that of the proposed FILO and existing LASA methods.

关键词： Ethernet passive optical network(EPON) optical network unit(ONU) polling sequence power conservation

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Bridging electrical power and entropy of ONU in EPON

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Optoelectronics Letters 2021年第2期17卷 102-106页

作者： bhargav ram rayapati Nakkeeran Rangaswamy Department of Electronics Engineering School of Engineering and TechnologyPondicherry UniversityPondicherry 605014India

This letter deliberates bridging of overall electricity power requirements of the optical network unit(ONU) with the entropy noted through the ONU state transition models considered in ethernet passive optical network(EPON). The entropy depends on the steady state and transition probabilities of data. On the other hand, the power requirements(consumption) of ONUs depend on the steady sate probability of ONUs. The potential relation derived between the entropy and electrical power reveals that they related exponentially but for their logarithmic reliance. Also, the relation is validated through the numerical simulation. The deduced relation has its importance to understand the nuances of one entity given the other.

关键词： power ONU network

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