高速光通信系統與元件之研究─子計劃一： 高速光交換與接取網路之研究(1/3)
Date Issued
2003-07-31
Date
2003-07-31
Author(s)
吳靜雄
DOI
912213E002106
Abstract
With the explosive growth of Internet traffic, demands for network capacity expand
rapidly. Electrical packet switches have faced the limits in handling tremendous
traffic. Optical packet switch (OPS) incorporating with wavelength division
multiplexing (WDM) technology, which has high-speed switching capability and data
rate/format transparency, seems to be an alternative in the near future. Only the
simplest mechanisms, such as passive schemes, are promising to perform the
functions for OPS. Some simple priority strategies for OPS have been reported in the
literatures [1]-[3]. However, those proposed approaches are only discussed under
short-range dependent traffic. Real Internet traffic has shown the self-similar nature,
which can cause serious performance degradation [4]. The influence of long-range
dependent (LRD) traffic on buffer management should be investigated. This paper
presents the performance analysis of several simple priority strategies under LRD
traffic and recommends the most efficient priority strategy.
On the other hand, Passive optical network (PON) is considered to be a
solution to realize full-service access networks (FSAN). It is a point-to- multipoint
optical network with no active devices through the signal transmission. Combining
Ethernet frame with PON (EPON) is a promising candidate for next-generation
broadband access networks. We proposed an EPON configuration using optical code
division multiple access (OCDMA) in its upstream direction. We also propose a
synchronization circuit to eliminate the effect of jitter. Numerical results show that the
proposed synchronization circuit can make the system robust against jitter. The
proposed system can achieve the goal of future broadband access networks.
Publisher
臺北市：國立臺灣大學電信工程學研究所
Type
report
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