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Research on Technologies of the Carrier Reused and Multicast Transmission in WDM-PON

Author: GeLingZhi
Tutor: XiaoShiLin
School: Shanghai Jiaotong University
Course: Communication and Information System
Keywords: Passive Optical Network WDM Passive Optical Network Carrier reuse Multicast / broadcast Reduced Swing Differential Signaling
CLC: TN929.1
Type: Master's thesis
Year: 2010
Downloads: 115
Quote: 0
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Abstract


With the rapid development of video-on-demand, high-definition TV, Internet telephony (VoIP) business, increasing broadband access network requirements, traditional digital subscriber line (xDSL) access methods can not meet these new business demand, there is an urgent need for new technology to solve this problem. Therefore, the passive optical network (PON) become the hotspot of current research, including time division multiplexing passive optical network (TDM-PON) technology has been commercially available. TDM-PON using time-division multiplexing access by multiple users share bandwidth resources, a user bandwidth is very limited and can not meet the needs of future high-bandwidth multi-service. Further, since the TDM-PON requires strict control on the slot, so that brought the management complexity. Thus, the wavelength division multiplexing passive optical network (WDM-PON) has become the next-generation fiber-optic broadband access network, one of the major programs. This paper around the carrier reuse WDM-PON and multicast transmission technology to expand the system. The first introduces the basics of the access network, the WDM-PON system architecture, clear the significance of the research work. WDM-PON uplink carrier re-modulation technique and system simulation study, conducted in-depth research program using intensity modulation format gives the best performance point for the realization of low-cost, \ONU) provides a good theoretical reference, a good guide value. Secondly, in a passive optical network, with users increasing business, multicast / broadcast is an urgent problem. This paper the analysis of existing multicast scheme based on the proposed multicast scheme dynamic switching based NRZ / Manchester yds., type, and by means of a the Dynamic switch to select the the downlink unicast data using the modulation format, so as to realize the multicast technology . The program can be flexible multicast / broadcast business, and has a simple clock recovery. In order to further enhance the capacity of the high-speed data processing node in the optical network, Reduced Swing Differential Signaling (LVDS) technology. LVDS technology is the core of a very low voltage amplitude of high-speed differential transmission data, point-to-point or point-to-multipoint connections can be achieved. This article uses the Verilog language a the LVDS key technology clock generation, data transmission and data reception modules, and to use ModelSim6.2C simulation software unit testing and system verification of these modules, thus confirming the above system functions correctness, provides a good reference for the future to resolve the problem of high-speed data processing.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Wireless communications > Lightwave communications, laser communications
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