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Frontiers of Optoelectronics

ISSN 2095-2759

ISSN 2095-2767(Online)

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Front Optoelec Chin    2011, Vol. 4 Issue (2) : 217-222    https://doi.org/10.1007/s12200-011-0216-z
RESEARCH ARTICLE
Design and evaluation of scheduling algorithms for TDM/WDM PON based on RSOA
Kang YANG1,2,3, Minming ZHANG1,2,3(), Deming LIU1,2,3, Lei DENG1,2,3
1. School of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China; 2. National Engineering Laboratory for Next Generation Internet Access System, Huazhong University of Science and Technology, Wuhan 430074, China; 3. Wuhan National Laboratory for Optoelectronics, Wuhan 430074, China
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Abstract

This paper presents a scalable and cost-effective hybrid time division multiplexing (TDM)/wavelength division multiplexing (WDM) passive optical network (PON), in which reflective semiconductor optical amplifiers (RSOAs) are used as optical network units (ONUs) and a shared tunable laser and photoreceiver stack locate at the optical line terminal (OLT). Especially, tunable transmitters are not only shared by all ONUs, but also used for both upstream and downstream transmissions. To solve resource contention problem and provide efficient bidirectional communications between the OLT and the ONUs, two novel algorithms are proposed to manipulate the wavelength accessibility and the burst scheduling. The performance of both algorithms in terms of the average packet end-to-end delay and throughput were simulated and evaluated.
Keywords passive optical network (PON)      wavelength division multiplexing (WDM)      scheduling algorithm      simulation     
Corresponding Author(s): ZHANG Minming,Email:mmz@hust.edu.cn   
Issue Date: 05 June 2011
 Cite this article:   
Deming LIU,Lei DENG,Minming ZHANG, et al. Design and evaluation of scheduling algorithms for TDM/WDM PON based on RSOA[J]. Front Optoelec Chin, 2011, 4(2): 217-222.
 URL:  
https://academic.hep.com.cn/foe/EN/10.1007/s12200-011-0216-z
https://academic.hep.com.cn/foe/EN/Y2011/V4/I2/217
Fig.1  Network architecture
Fig.1  Network architecture
Fig.2  Example of EATS scheduling algorithm
Fig.2  Example of EATS scheduling algorithm
parameterdescriptionvalue
Nnumbers of ONUs16
RUline rate of user to ONU link100 Mbps
Rline rate1000 Mbps
QONUqueue length at each ONU1 MB
QOLTqueue length for each ONU at OLT1 MB
Gguard interval1 μs
Tab.1  System parameters
Fig.3  Upstream delay
Fig.3  Upstream delay
Fig.4  Downstream delay
Fig.4  Downstream delay
Fig.5  Average throughput for upstream
Fig.5  Average throughput for upstream
Fig.6  Average throughput for downstream
Fig.6  Average throughput for downstream
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