DocumentCode :
23554
Title :
A Multi-Threaded Dynamic Bandwidth and Wavelength Allocation Scheme With Void Filling for Long Reach WDM/TDM PONs
Author :
Buttaboni, Anna ; De Andrade, Marilet ; Tornatore, Massimo
Author_Institution :
Dept. of Electron. & Inf., Politec. di Milano, Milan, Italy
Volume :
31
Issue :
8
fYear :
2013
fDate :
15-Apr-13
Firstpage :
1149
Lastpage :
1157
Abstract :
Dynamic Bandwidth Allocation (DBA) is a major research challenge in the migration of Passive Optical Networks (PON) systems towards Long Reach PON, especially when hybrid WDM/TDM is used (LR WDM/TDM PON). New solutions for Dynamic Bandwidth and Wavelength Assignment (DBWA) are sought to address two main critical issues of such PON systems: how to schedule the transmissions over multiple wavelengths and how to efficiently exploit the bandwidth in presence of long propagation delays of long reach scenarios. In this work, for the first time, we investigate the Multi-thread polling in a LR WDM/TDM PON. Then, we propose a new DBWA scheme, called EFT-partial-VF Multi-threaded, which effectively combines some of the features of, the Earliest Finish Time with Void Filling (EFT-VF) algorithm, with the Multi-thread algorithm. The two proposed solutions, namely the MT algorithm and the EFT-partial-VF Multi-threaded algorithm, provide significant improvement in terms of average delay, if compared with existing algorithms such as the EFT and the EFT-VF. Besides this, we extend the definition of polling cycle to hybrid WDM/TDM PON and we provide a method to calculate it.
Keywords :
bandwidth allocation; multi-threading; passive optical networks; time division multiplexing; wavelength assignment; wavelength division multiplexing; DBWA scheme; EFT-partial-VF multithreaded algorithm; LR WDM-TDM PON; MT algorithm; earliest finish time with void filling algorithm; hybrid WDM-TDM PON; long reach WDM-TDM PON; multithread polling; multithreaded dynamic bandwidth allocation; passive optical network systems; passive optical networks; polling cycle; wavelength allocation scheme; Algorithm design and analysis; Filling; Message systems; Optical network units; Passive optical networks; Time division multiplexing; Wavelength division multiplexing; Cycle time; dynamic bandwidth allocation; hybrid WDM/TDM PON; long-reach PON;
fLanguage :
English
Journal_Title :
Lightwave Technology, Journal of
Publisher :
ieee
ISSN :
0733-8724
Type :
jour
DOI :
10.1109/JLT.2013.2242045
Filename :
6417938
Link To Document :
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