Title: The loading-aware energy saving scheme for EPON networks

Authors: Chien-Ping Liu; Ho-Ting Wu; Kai-Wei Ke; Chia-Chih Chien

Addresses: Department of Computer Science and Information Engineering, National Taipei University of Technology, No. 1, Sec. 3, Chung-Hsiao E. Rd., Taipei, 106, Taiwan; Department of Marketing and Logistics Management, Taipei City University of Science and Technology, No. 2, Xueyuan Rd., Beitou, Taipei, 112, Taiwan ' Department of Computer Science and Information Engineering, National Taipei University of Technology, No. 1, Sec. 3, Chung-Hsiao E. Rd., Taipei, 106, Taiwan ' Department of Computer Science and Information Engineering, National Taipei University of Technology, No. 1, Sec. 3, Chung-Hsiao E. Rd., Taipei, 106, Taiwan ' Gigabyte Technology Co., Ltd., No. 6, Baoqiang Rd., Xindian Dist., New Taipei City, 231, Taiwan

Abstract: This paper proposes an energy saving mechanism in Ethernet passive optical networks (EPONs) for the optical network unit (ONU). It measures traffic loading continuously to identify traffic load for each ONU, then classifies such load to either a low or high loading level. The scheme allows ONU to transmit packets only when the system stays in high load conditions, otherwise ONU changes to one of power saving modes. Therefore, ONU can accumulate queued packets in low-load scenario and stay in power saving mode for longer duration. However, in order to avoid long queueing delay of high priority packets, the ONU will not switch to power saving mode, if the queue of high priority packets is not empty. Comparing to a previous proposed tri-mode energy saving scheme which imposed strict restriction on ONU's staying in energy saving modes, the proposed scheme achieves energy saving improvement without suffering noticeable delay performance degradation.

Keywords: Ethernet passive optical network; EPON; energy saving; delay performance; loading aware.

DOI: 10.1504/IJCSE.2019.103809

International Journal of Computational Science and Engineering, 2019 Vol.20 No.2, pp.146 - 156

Received: 29 Mar 2018
Accepted: 23 Jul 2018
Published online: 29 Nov 2019 *

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