Survivable Architecture with Dynamic Wavelength and Bandwidth Allocation Scheme in WDM-EPON

Hwang, I‐Shyan; Shyu, Zen-Der; Chang, Chun-Che

doi:10.1007/978-1-4020-9532-0_1

Cited by 2 publications

(2 citation statements)

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“…is the delay time of the EF packet i and N is the total number of EF packets received [15]. Simulation results show that the delay variance for EF traffic increases as the traffic load increases in DQ-DBA.…”

Section: Ef Jittermentioning

confidence: 97%

“…In addition, the high-priority traffic (EF) is modeled on a Poisson distribution and the packet size is fixed to 70 bytes. To show the effectiveness of high-priority traffic, three different EF, AF, and BE traffic ratios are analyzed and compared: scenario 244 (20%, 40%, 40%), scenario 433 (40%, 30%, 30%), and scenario 622 (60%, 20%, 20%) [14,15]. The simulation scenarios are summarized in Table 2.…”

Section: Performance Analysismentioning

confidence: 99%

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A Novel Dynamic Bandwidth Allocation Mechanism for Star-Ring-Based EPON

Hwang

Lee

Shyu

2011

ISRN Communications and Networking

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Ethernet Passive Optical Network (EPON) is proposed as a simple, cost-effective and scalable solution for bandwidth bottlenecks in access networks which can enhance the system performance because it transmits the aggregated high-speed traffic from hundreds of subscribers. Dynamic Bandwidth Allocation (DBA) mechanism has not yet been seriously considered for use in star-ring EPON architecture. In this paper, a distributed QoS-based dynamic bandwidth allocation (DQ-DBA) scheduling mechanism for the star-ring-based EPON architecture including optical line terminal (OLT), Sub-OLT and ONUs has been proposed to improve the system performance of traditional tree-based EPON architecture. In DQ-DBA, the highest-priority traffic of each ONU is directed to the OLT by the tree structure; moreover, the lower-priority traffic on each ONU is transmitted to the Sub-OLT by ring architecture. This approach can effectively resolve the idle period problem and reduce the overloading of OLT in conventional DBA mechanisms. Exhaustive simulation experiments are performed to compare the system performance between the tree and the star-ring architectures and validate the effectiveness of the proposed mechanism. Simulation results show that the proposed DQ-DBA mechanism in star-ring architecture can reduce packet delay and jitter for the high-priority traffic, thus ensuring the quality of service (QoS) regardless of subscriber numbers.

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Section: Ef Jittermentioning

confidence: 97%

Section: Performance Analysismentioning

confidence: 99%