IGFS: A New MAC Protocol Exploiting Heterogeneous Propagation Delays in the Dynamic Bandwidth Allocation on WDM-EPON

Author

Sarigiannidis, Panagiotis G. ; Petridou, Sophia G. ; Papadimitriou, Georgios I. ; Obaidat, Mohammad S.

Author_Institution

Dept. of Inf., Aristotle Univ., Thessaloniki, Greece

Volume

4

Issue

1

fYear

2010

fDate

3/1/2010 12:00:00 AM

Firstpage

49

Lastpage

56

Abstract

One of the most challenging issues of the Ethernet passive optical networks´ (EPONs) architecture is the bandwidth allocation problem. Various dynamic allocation schemes have been proposed to schedule the subscribers´ demands. However, the performance of all these schemes is significantly degraded when the round-trip times (RTTs) of the optical network units (ONUs) are dissimilar, due to the large number of gaps in the transmission schedule. Unfortunately, in real networks, RTTs are usually dissimilar. In this paper a new medium access control (MAC) protocol for multichannel EPONs, namely the Intelligent Gap Filling Strategy (IGFS) is proposed. The IGFS employs two algorithms: the DissimilarityExploitation algorithm, which exploits the RTTs´ dissimilarities, and the MinimumLatencyScheduling algorithm, which rearranges the ONUs´ service order in order to favor the requests that cause the minimum scheduling latency.

Keywords

access protocols; bandwidth allocation; optical fibre LAN; scheduling; wavelength division multiplexing; Ethernet passive optical networks; IGFS; MAC protocol; WDM-EPON; dissimilarity exploitation algorithm; dynamic bandwidth allocation; heterogeneous propagation delays; intelligent gap filling strategy; minimum latency scheduling; optical network units; round-trip times; transmission schedule; wavelength division multiplexing; Passive optical networks; WDM-EPONs; reservation; scheduling;

fLanguage

English

Journal_Title

Systems Journal, IEEE

Publisher

ieee

ISSN

1932-8184

Type

jour

DOI

10.1109/JSYST.2009.2039886

Filename

5405059