Title :
IPACT With Grant Estimation (IPACT-GE) Scheme for Ethernet Passive Optical Networks
Author :
Zhu, Yongqing ; Ma, Maode
Author_Institution :
Data Storage Inst., Singapore
fDate :
7/15/2008 12:00:00 AM
Abstract :
Dynamic bandwidth allocation (DBA) is an open and hot topic in the Ethernet passive optical network (EPON), which is regarded as one of the best choices for next-generation access networks. This paper proposes an estimation-based scheme, interleaved polling with adaptive cycle time with grant estimation (IPACT-GE), for effective upstream channel sharing among multiple optical network units (ONUs) in EPONs. By estimating the amount of new packets arriving between two consecutive pollings and granting ONUs with extra estimated amount, the proposed IPACT-GE scheme can achieve shorter waiting delay and less buffer occupancy at the light load than IPACT, a significant DBA scheme in EPONs. Moreover, when combined with the strict priority queue (SPQ) mechanism to provide differentiated services, IPACT-GE can greatly mitigate the light load penalty that is obvious in the IPACT solution combined with SPQ.
Keywords :
DiffServ networks; access protocols; local area networks; optical fibre networks; Ethernet passive optical networks; IPACT-GE; buffer occupancy; differentiated services; dynamic bandwidth allocation; grant estimation; interleaved polling adaptive cycle time; light load penalty; medium access control; next-generation access networks; optical network units; strict priority queue; upstream channel sharing; Channel allocation; Delay estimation; EPON; Ethernet networks; Next generation networking; Optical buffering; Optical fiber devices; Optical fiber networks; Optical network units; Passive optical networks; Differentiated services (DiffServ); Ethernet passive optical network (EPON); dynamic bandwidth allocation (DBA); medium access control (MAC);
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2008.919462