Delay-aware sleep control of optical network unit in EPONs using disturbance observer

• Kikuchi Takahiro

  Department of Electronics and Electrical Engineering, Keio University

• Kubo Ryogo

  Department of Electronics and Electrical Engineering, Keio University

Abstract

Recently, quality-of-service (QoS)-aware cyclic sleep controllers for optical network units (ONUs) have been proposed to guarantee the QoS and energy efficiency in passive optical networks (PONs). Proportional-integral-derivative (PID)-based cyclic sleep controllers can maintain the average downstream queueing delay in an optical line terminal (OLT) at a constant level. However, conventional PID-based controllers generate errors between a target queueing delay and an actual delay because of the nonlinear characteristics of the cyclic sleep mechanism. This letter proposes a feedback controller with a disturbance observer (DOB) that includes a linearized cyclic sleep model to improve the QoS in terms of the average downstream queueing delay. Simulations confirm that the proposed DOB-based controller can reduce errors effectively compared with a PID-based controller.

Journal

• IEICE Communications Express

  IEICE Communications Express 6 (11), 615-620, 2017

  The Institute of Electronics, Information and Communication Engineers

Keywords

• passive optical network
• optical access network
• cyclic sleep
• energy efficiency
• quality of services

Details

• CRID: 1390282680391687936
• NII Article ID: 130006192306
• DOI: 10.1587/comex.2017xbl0112
• ISSN: 21870136
• Web Site: https://www.jstage.jst.go.jp/article/comex/6/11/6_2017XBL0112/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed