Browsing by Author "Lin, Shih-Hsuan"

Now showing 1 - 7 of 7

2.1-Tb/s.km OFDM Long-Reach PON Transmission using a Cost-Effective Electro-Absorption Modulator
(2011-01-01)
Hsu, Dar-Zu
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Wei, Chia-Chien
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Chen, Hsing-Yu
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Chen, Jyehong
;
Yuang, Maria C.
We experimentally demonstrate a superior performance of 2.1-Tb/s.km OFDM-signal transmission over 100-km long-reach PONs, which is achieved by using an EAM and direct-detection, and adopting the 128-QAM format and adaptive subcarrier power weighting.
21 Gb/s after 100 km OFDM long-reach PON transmission using a cost-effective electro-absorption modulator
(2010-12-20)
Hsu, Dar-Zu
;
Wei, Chia-Chien
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Chen, Hsing-Yu
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Chen, Jyehong
;
Yuang, Maria C.
We experimentally demonstrate a superior performance of 2.1-Tb/s.km OFDM signal transmission over 100-km long-reach PONs. While the bandwidth of a 100-km SMF transmission system is limited to 4.3 GHz due to positive chirp, we successfully achieve spectrally-efficient 21-Gb/s signaling by using a cost-effective and low-chirp EAM, and adopting the 128-QAM format and adaptive subcarrier pre-emphasis. (C)2010 Optical Society of America
A 40-Gb/s OFDM PON System Based on 10-GHz EAM and 10-GHz Direct-Detection PIN
(2012-01-01)
Chen, Hsing-Yu
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Wei, Chia Chien
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Hsu, Dar-Zu
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Yuang, Maria C.
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Chen, Jyehong
This letter demonstrates a 40-Gb/s optical double-sideband (ODSB) orthogonal frequency-division multiplexing passive optical network (OFDM-PON) system using a cost-effective 10-GHz-bandwidth electroabsorption modulator (EAM). By employing a subcarrier-adaptive modulation format and pre-emphasis, we successfully achieve 20-km EAM-based single-mode-fiber (SMF) transmission.
A QoS Optical Packet Switching System: Architectural Design and Experimental Demonstration
(2010-05-01)
Yuang, Maria C.
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Lin, Yu-Min
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Shih, Ju-Lin
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Tien, Po-Lung
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Chen, Jason J.
Optical packet switching has been considered a prominent paradigm for future WDM networks to efficiently support a multitude of applications with diverse quality of service requirements. In this article we present the architectural design and experimental demonstration of a 10 Gb/s QoS optical packet switching system (QOPSS) for WDM networks. It embodies a set of many-to-one space switches, each of which handles the switching solely for a cluster of wavelengths. With the cluster-based optical switch design, QOPSS trades off limited statistical multiplexing gains for higher system scalability. By many-to-one, multiple packets that are carried by different internal wavelengths are scheduled to switch to the same output port but receive different delays afterward. QOPSS adopts downsized feed-forward optical buffers, yielding drastic reduction in packet loss probability in an economical manner. Significantly, through using four-wave-mixing wavelength converters at the output section, QOPSS permits optical packet preemption, thus achieving effectual QoS differentiation. The article presents both simulation and experimental testbed results to demonstrate the feasibility and superior packet loss/QoS performance of the system.
Demonstration of a Novel PON System with Distributed Real-Time Bandwidth Allocation
(2009)
Yuang, Maria C.
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Lin, Shih-Hsuan
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Lee, Steven S. W.
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Shih, Julin
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Lin, Yu-Min
This paper demonstrates a novel distributed control PON system (DCPON). Equipped with a distributed adaptable DBA algorithm that enables real-time precise bandwidth allocation, DCPON achieves high utilization, fairness, low request/response time, and superior service differentiation. (C)2009 Optical Society of America
gamma-TBSC: Time-Bound Signaling Control with gamma-Percent Soft Guarantee in IEEE 802.11 Wireless LANs
(2010)
Shih, Ju-Lin
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Yuang, Maria C.
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Lin, Shih-Hsuan
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資訊工程學系
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Department of Computer Science
Signaling control schemes for wireless multimedia services are expected to maximize the number of newly-accepted mobile terminals (MTs), i.e., system throughput, while maintaining the quality of service (QoS) requirements for the existing MTs in the system. In this paper, we propose a gamma-percent time-bound signaling control (gamma-TBSC) scheme that resolves a maximum number of MTs mostly within a given bounded time, subject to assuring gamma-percent soft guarantee for existing MTs. The gamma-TBSC scheme performs signaling control in two phases: the call-invitation phase, and the contention-resolution phase. In the first phase, an access point invites a number of so-called potential MTs to make reservations during a call invitation interval (CII). If any collision occurs, gamma-TBSC performs contention resolution in the second phase until all potential MTs are resolved successfully. Most importantly, prior to the two-phase operation, gamma-TBSC analytically and statistically determines the potential MT number and the CII length such that the system throughput is maximized and the QoS is soft guaranteed. From simulation results that pit gamma-TBSC against several variants of carrier sense multiple access with collision avoidance (CSMA/CA) schemes, we delineate that gamma-TBSC outperforms these schemes with respect to throughput and delay performance.
Pseudo-Banyan Optical WDM Packet Switching System With Near-Optimal Packet Scheduling
(2009-08-01)
Yuang, Maria C.
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Tien, Po-Lung
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Lin, Shih-Hsuan
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資訊工程學系
;
電信工程研究所
We present a novel pseudo-Banyan optical packet switching system (SBOPSS) for optical wavelength division multiplexing (WDM) networks. The system includes a group of pseudo-Banyan space switches together with single-stage downsized fiber-delay-line-based optical buffers. SBOPSS is scalable, with the result that each pseudo-Banyan space switch performs packet switching only for a cluster of wavelengths. The downsized optical buffers that are shared by output ports via the use of a small number of internal wavelengths result in efficient reduction in packet loss. Essentially, SBOPSS employs a packet scheduling algorithm, referred to as the parallel and incremental packet scheduler (PIPS). Given a set of newly arriving packets per time slot, PIPS determines a maximum number of valid paths (packets) to be scheduled with the current buffers' state taken into account. The algorithm aims at maximizing the system throughput subject to satisfying three constraints, which are switch-contention free, buffer-contention free, and sequential delivery. Significantly, we prove that PIPS is incremental in the sense that the computed-path sets are monotonically non-decreasing over time. We then propose a hardware parallel system architecture for the implementation of PIPS. As is shown, PIPS achieves a near-optimal solution with an exceptionally low computational complexity, O, (|P| X log(2), NMW)), where P is the newly-arriving-packet set, N the number of input ports, and M and W the numbers of internal and external wavelengths, respectively. From simulation results that pit the PIPS algorithm against four other algorithms, we show that PIPS outperforms these algorithms on both system throughput and computational complexity.