Ethernet passive optical network (EPON) has been considered to solve the last mile bottleneck problem. In an effort to accommodate the explosive bandwidth demands from subscribers, the optical line terminal (OLT) efficiently divides and allocates time slots for data upstream to all optical network units (ONUs) in EPON. This technology is expected to be a core in the future fiber-to-the-home/-office/-curb (FTTH/O/C). We study previous algorithms for dynamic bandwidth allocation (DBA) in interleaved polling with adaptive cycle time (IPACT). For effective bandwidth allocation of the uplink channel, we propose an adaptive window-tuning algorithm (AdWin) based on the excessive bandwidth. This algorithm not only satisfies bandwidth demands of ONUs within the possible scope, but also seeks fairness among ONUs. The comprehensive computer simulation results indicate that the proposed scheme is up to 94% and 94% lower than previous schemes in terms of average packet delay and average queue size, respectively. It also demonstrates up to 86% improved performance in regards to packet loss ratio.
[1]
H. T. Mouftah,et al.
Media access control for Ethernet passive optical networks: an overview
,
2005,
IEEE Communications Magazine.
[2]
Glen Kramer,et al.
Ethernet passive optical network (EPON): building a next-generation optical access network
,
2002,
IEEE Commun. Mag..
[3]
Biswanath Mukherjee,et al.
Interleaved Polling with Adaptive Cycle Time (IPACT): A Dynamic Bandwidth Distribution Scheme in an Optical Access Network
,
2004,
Photonic Network Communications.
[4]
Jong-Tae Lim,et al.
Dynamic bandwidth allocation algorithm in Ethernet passive optical networks
,
2003
.
[5]
Walter Willinger,et al.
On the self-similar nature of Ethernet traffic
,
1993,
SIGCOMM '93.