An AWG-based WDM-PON architecture employing WDM/TDMA transmission for upstream traffic with dynamic bandwidth allocation |
| |
Authors: | Kyeong-Eun Han Won-Hyuk Yang Debasish Datta Young-Chon Kim |
| |
Affiliation: | (1) Department of Computer Engineering, Chonbuk National University, Jeonju, Korea;(2) Department of Electronics and Electrical Communication Engineering, IIT Kharagpur, Kharagpur, India |
| |
Abstract: | In this article, we examine a candidate architecture for wavelength-division multiplexed passive optical networks (WDM-PONs) employing multiple stages of arrayed-waveguide gratings (AWGs). The network architecture provides efficient bandwidth utilization by using WDM for downstream transmission and by combining WDM with time-division multiple access (TDMA) for upstream transmission. In such WDM-PONs, collisions may occur among upstream data packets transmitted simultaneously from different optical networking units (ONUs) sharing the same wavelength. The proposed MAC protocol avoids such collisions using a request/permit-based multipoint control protocol, and employs a dynamic TDMA-based bandwidth allocation scheme for upstream traffic, called minimum-guaranteed maximum request first (MG-MRF), ensuring a reasonable fairness among the ONUs. The entire MAC protocol is simulated using OPNET and its performance is evaluated in terms of queuing delay and bandwidth utilization under uniform as well as non-uniform traffic distributions. The simulation results demonstrate that the proposed bandwidth allocation scheme (MG-MRF) is able to provide high bandwidth utilization with a moderately low delay in presence of non-uniform traffic demands from ONUs. |
| |
Keywords: | Wavelength-division multiplexing Passive optical network Dynamic bandwidth allocation Arrayed-waveguide grating |
本文献已被 SpringerLink 等数据库收录! |
|