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Open AccessArticle

Activation Process of ONU in EPON/GPON/XG-PON/NG-PON2 Networks

Department of Telecommunication, Brno University of Technology, Technicka 12, 616 00 Brno, Czech Republic
Department of Optical Networks, CESNET a.l.e., Zikova 4, 160 00 Prague, Czech Republic
Author to whom correspondence should be addressed.
Appl. Sci. 2018, 8(10), 1934;
Received: 2 October 2018 / Revised: 11 October 2018 / Accepted: 13 October 2018 / Published: 16 October 2018
This article presents a numerical implementation of the activation process for gigabit and 10 gigabit next generation and Ethernet passive optical networks. The specifications are completely different because GPON, XG-PON and NG-PON2 were developed by the International Telecommunication Union, whereas Ethernet PON was developed by the Institute of Electrical and Electronics Engineers. The speed of an activation process is the most important in a blackout scenario because end optical units have a timer after expiration transmission parameters are discarded. Proper implementation of an activation process is crucial for eliminating inadvisable delay. An OLT chassis is dedicated to several GPON (or other standard) cards. Each card has up to eight or 16 GPON ports. Furthermore, one GPON port can operate with up to 64/128 ONUs. Our results indicate a shorter duration activation process (due to a shorter frame duration) in Ethernet-based PON, but the maximum split ratio is only 1:32 instead of up to 1:64/128 for gigabit PON and newer standards. An optimization improves the reduction time for the GPON activation process with current PLOAM messages and with no changes in the transmission convergence layer. We reduced the activation time from 215 ms to 145 ms for 64 ONUs. View Full-Text
Keywords: activation process; EPON; GPON; MATLAB; NG-PON2; timing; transmission convergence layer; XG-PON activation process; EPON; GPON; MATLAB; NG-PON2; timing; transmission convergence layer; XG-PON
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Horvath, T.; Munster, P.; Oujezsky, V.; Vojtech, J. Activation Process of ONU in EPON/GPON/XG-PON/NG-PON2 Networks. Appl. Sci. 2018, 8, 1934.

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