Downstream-based Scheduling for Energy Conservation in Green EPONs
Type
ArticleKAUST Department
Computer Science ProgramComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Networks Laboratory (NetLab)
Date
2012-05-01Permanent link to this record
http://hdl.handle.net/10754/348537
Metadata
Show full item recordAbstract
Maximizing the optical network unit’s (ONU) sleep time is an effective approach for achieving maximum energy conservation in green Ethernet passive optical networks (EPONs). While overlapping downstream and upstream ONU transmissions can maximize the ONU sleep time, it jeopardizes the quality of service (QoS) performance of the network, especially for downstream traffic in case the overlapping is based on the upstream time slot. In this paper, we study the downstream traffic performance in green EPONs under the limited service discipline and the upstream-based overlapped time window. Specifically, we first derive the expected mean packet delay, and then present a closed-form expression of the ONU sleep time, setting identical upstream/downstream transmission cycle times based on a maximum downstream traffic delay re-quirement. With the proposed system model, we present a novel downstream bandwidth allocation scheme for energy conservation in green EPONs. Simulation results verify the proposed model and highlight the advantages of our scheme over conventional approaches.Citation
Downstream-based Scheduling for Energy Conservation in Green EPONs 2012, 7 (5) Journal of CommunicationsPublisher
Engineering and Technology PublishingJournal
Journal of CommunicationsAdditional Links
http://www.jocm.us/index.php?m=content&c=index&a=show&catid=37&id=76ae974a485f413a2113503eed53cd6c53
10.4304/jcm.7.5.400-408