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Study Of Routing And Wavelength Assignment Algorithms And Performance Analysis Of WDM Optical Networks With Wavelength Converters

Posted on:2003-09-15Degree:DoctorType:Dissertation
Country:ChinaCandidate:L ZhangFull Text:PDF
GTID:1118360065951238Subject:Communication and Information System
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The information society is now changing many aspects of our life. In this society, the demand and dependence on the information are the main symbols. With the coming of the "INTERNET era", a lot of new information service will be in use and the need for the bandwidth will become more and more. These cause the mismatch between the need and the traditional backbone network in which the SONET/SDH technology is dominant. It is urgent of the service provider to find another technology that has more performance-to-price than ever to overcome this mismatch. The WDM (Wavelength Division Multiplexing) technology is now coming on the "stage" to satisfy the urgent need. Because the WDM technology can fully utilize the enormous bandwidth of the optical fiber, the cost for transfering data can be greatly decreased. This enables WDM technology to be the most attractable technology in wide backbone network. It is predicted that in the near future, the WDM technology will be widely used in other networks.In WDM networks, wavelength conversion is a key technology, but it is always the focus of the contention. Although the wavelength conversion can improve the performance of WDM networks, simplify the control, and so on, it is difficult to manufacture the ideal all-optical wavelength converter due to the limit of the technology. And more the technology is now in the laboratory, when it is on commercial use, the price will be very expensive. How to overcome the disadvantages of the technology? The technology of manufacturing the all-optical wavelength converter with limited-range conversion and the sparse distribution of wavelength converters are under research. This paper is concentrated on the following three aspects:(1) The researches about limited-range wavelength conversion, the contents include: the research about the RWA (Routing and Wavelength Assignment) of XGM (Cross-Gain Modulation) wavelength converters; the performance analysis of WDM network with limited-range wavelength converters, which includes XGM and FWM (Four-Wave Mixing) wavelength converters; the research about the influence of the alternate RWA to the performance of WDM networks with limited-range wavelength converters. The details are from chapter 2 to chapter 4.(2) The researches about survivable WDM networks. The contents include: the influence of wavelength converters and tunable transceivers to the performance of survivable WDM networks under the condition of dynamic traffic; the influence of XGM and FWM wavelength converters to the performance of survivable WDM networks. The details are in chapter 5 and chapter 6.(3) The researches about the sparse distribution of wavelength converters, the contents include: the heuristic algorithm to decide the number and location of wavelength converters; the performance comparison of the two different OXCs (Optical Cross-Connect): Share-per-Link OXC and Share-per-Node OXC. The details are in chapter 7 and chapter 8.The background, status and development of the WDM technology are described in chapter 1. Many key technologies in WDM network, including the technologies of manufacturing the elements, networking and wavelength conversion, are described in this chapter. At the end of thechapter, the development of the future all-optical network and the employment of wavelength converters in the future all-optical network are introduced.The performance of XGM wavelength converters is studied in chapter 2. Three RWA algorithms for XGM wavelength converters are proposed, by simulation in different kinds of networks, the performance of three algorithms are compared, the results show that the performance of the XGM (FF/SW) algorithm is the best and its complexity is not high. At the end of the chapter, the effort to improve the fairness of WDM networks with XGM wavelength converters is performed; the result shows that it is not effective.In chapter 3, the performance of WDM networks with limited-range wavelength converters that include FWM and XGM wavelength converters is deeply in...
Keywords/Search Tags:Wavelength converter, XGM wavelength converter, FWM wavelength converter, Sparse wavelength conversion, OXC
PDF Full Text Request
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