A Design of WDM/TDM-PON Provisioning for Future Optical Access Network Upgrade

Sungkuen LEE  Eallae KIM  Yongwon LEE  Sangrok LEE  Daekwang JUNG  Seongtaek HWANG  Yunje OH  Jinwoo PARK  

IEICE TRANSACTIONS on Communications   Vol.E90-B    No.9    pp.2456-2463
Publication Date: 2007/09/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e90-b.9.2456
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Fiber-Optic Transmission for Communications
Passive Optical Network (PON),  Dynamic Bandwidth Allocation (DBA),  Time Division Multiplexing (TDM),  Wavelength Division Multiplexing (WDM),  

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In this paper, we propose a PON-based access network based on conventional TDM-PON architecture for the smooth, economical and effective transition to the future optical access network. We also propose a dynamic MAC protocol for wavelength channel and bandwidth allocation in the TDM-PON subscriber networks, which can provide enhanced network scalability and flexibility, and greater adaptability to the increasing number of subscribers in TDM-PON. In the proposed dynamic MAC protocol, several key functions are manifested, such as multiple wavelength channel utilization and dynamic allocation of multiple time-slots to a user depending on SLA between OLT and ONUs to meet QoS requirements. A dedicated control channel is used for delivering the request and status information between OLT and ONUs. We evaluate the performances of the proposed MAC protocol thru a statistical queuing analysis and numerical simulations. In addition, through simulations using various traffic models we verify the superior performance of the proposed approach by comparing it with conventional TDM-PONs.