Butt, Rizwan AslamFaheem, M.Ashraf, M. WaqarIdrus, Sevia M.2021-04-262021-04-2620181387-974X1572-8188http //doi. org/ 10.1007/s11107-018-0799-zhttps://hdl.handle.net/20.500.12573/678Funding was provided by Higher Education Commision, Pakistan (SRGP Grant No. 1981).In passive optical network (PON), in addition to efficient bandwidth management, a dynamic bandwidth assignment (DBA) scheme can also enhance the energy efficiency performance of the optical networks units (ONUs) during sleep mode. A few such green DBA schemes have been proposed in literature for EPON, however, ITU compliant PONs have not got attention. In this study, the role of a DBA scheme during the cyclic sleep mode for XGPON has been investigated. A sleep assistive (SA)-DBA scheme is proposed that not only improves the energy saving performance of cyclic sleep mode but also reduces the upstream delays and variance for all the type-2 (T2), type-3 (T3) and type-4 (T4) traffic classes. Although, the upstream delay of type-1 (T1) traffic class slightly increases, the average upstream delay of all the traffic classes remains below the set target delay limit of 56ms.enginfo:eu-repo/semantics/closedAccessXGPONPONEnergy efficientBandwidth assignmentBandwidth efficientarticleVolume: 363289300