Browsing by Author "Wang, Ya-Shian"

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A novel medium access control and processing system for a packet-switched WDM metro ring network
(2008)
Yuang, Maria C.
;
Wang, Ya-Shian
;
Lin, Yu-Min
;
資訊工程學系
;
Department of Computer Science
We present the design/experimentation of a medium-access control and processing system (MACOPS) for an optical packet-switched WDM network. MACOPS enables optical parallel headers to be efficiently received/modified via wavelength-time conversion, and achieves exceptional throughput/delay/fairness performance. (C) 2008 Optical Society of America.
A Novel Optical-Header Processing and Access Control System for a Packet-Switched WDM Metro Ring Network
(2009-11-01)
Yuang, Maria C.
;
Lin, Yu-Min
;
Wang, Ya-Shian
;
資訊工程學系
;
Department of Computer Science
Optical packet switching (OPS) has been considered to be a promising paradigm to support a wide range of applications with different time-varying and high bandwidth demands for future optical metropolitan area networks (MANs). In this paper, we present the design of an experimental optical-header processing and access control system (OPACS) for an OPS wavelength-division multiplexing metro slotted-ring network. On the slotted ring, each control header is in-band time-division-multiplexed with its corresponding payload within a slot. OPACS enables the optical headers across all parallel wavelengths to be efficiently received, modified, and retransmitted by means of a wavelength-time conversion technique. Moreover, OPACS embodies a versatile medium access control (MAC) scheme, referred to as the distributed multigranularity and multiwindow reservation (DMGWR) mechanism, which is particularly advantageous for traffic of high and varying loads and burstiness. Basically, DMGWR requires each node to make reservation requests prior to transmissions while maintaining a distributed queue for ensuring fair access of bandwidth. By "multigranularity," each node can make a reservation of multiple slots at a time. By "multiwindow," each node is allowed to have multiple outstanding reservations within the window size. From simulation results that pit the OPACS network against two other existing networks, we show that the OPACS network outperforms these networks with respect to throughput, access delay, and fairness under various traffic patterns. Experimental results demonstrate that all optical headers are removed and combined with the data in a fully synchronous manner, justifying the viability of the system.
Design and Experimentation of an Optical-Header Processing and Access Control System for a Packet-Switched WDM Metro Ring Network
(2009)
Yuang, Maria C.
;
Wang, Ya-Shian
;
Lin, Yu-Min
;
資訊工程學系
;
Department of Computer Science
In this paper, we present the design of an experimental optical-header processing and access control system (OPACS) for an optical packet switched (OPS) WDM metro slotted-ring network. Each control header is in-band time-division-multiplexed with its payload. OPACS enables the optical headers across all parallel wavelengths to be efficiently received, modified, and re-transmitted based on a wavelength-time conversion technique. Bandwidth access in OPACS is governed by a versatile access control scheme, called the distributed multi-granularity and multi-window reservation (DMGWR) mechanism. With DMGWR, the OPACS network is shown to outperform two existing networks with respect to throughput, access delay, and fairness under various traffic patterns. Experimental results demonstrate that all optical headers are removed and combined with the data in a fully synchronous manner, justifying the viability of the system.