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通信仿真平臺(tái)設(shè)計(jì)學(xué)士學(xué)位論文-資料下載頁(yè)

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The first and most important development is the growth of the global Internet traffic. Summary of important trends in the global Internet traffic growth in the global geographic regions and their Internet penetration. The second part of the supporting hardware necessary to realize the wireless munication backbone network technology development. The third part is the central issue of wireless munications, in particular, local individuals, and the fourth and final part of the concluding remarks.The development of many technologies is clearly through the realization of wireless munications in order to meet the environmental requirements of the social background of this technology development. For example, Internet traffic per year doubled, and this rapid growth in Internet traffic and WWW (WWW) as the backbone network to configure the wireless does not necessarily require huge bandwidth of the vital, but for local wireless munications. Backbone network depends mainly on the technical development of fiberoptic cable and related ancillary technical support to support the run. This and other supporting technologies including information processing and WDM (Wavelength Division Multiplexing) and achieved efficient wireless munications bee possible. Wireless munication, wireless Internet, in particular, wireless Internet focus, even moving a short distance within the scope of local individual users is very important. The IEEE wireless LAN for and cooperation with media access control protocol of the general principles can be extended to other types of wireless networks, such as wireless personal area network (WPAN). The scope of the service area to bee smaller, to allow local individuals to take full advantage of wireless munication media.For wireless Internet traffic. Wireless munication is the most convenient wireless Internet transmission medium, the effective use of the wireless transmission medium is critical. Reliable access to dozens of MHz geographic area across fairly large in which the wireless Internet will require ten times more cells in the voice system, the small size of each of monocles will measure dozens of square meters is about percent the size of the conventional cell. Than traditional batteries, it can acmodate more for a given data rate of the active device. In order to make this possible, the radio spectrum spatial reuse is necessary, in order to allow individual users access closer to the lowpower transmission point.The overall munication system for the rapid growth of Internet traffic can be supported by three key areas of technology development, 1) hardware technology needs of individual users wireless transmission of highdensity implementation, 2) supporting hardware technology of fiberoptic cable, 3 ) the overall munication system operation and maintenance of software technology, we reviewed the first two parts of the hardware aspects.The highest Internet penetration rate highest in 24 countries. The highest penetration rate (% of the population) is % ( million Internet users in Sweden), Han Hong Kong, the second % ( million), the third Danish % (370 million), followed by Norway % ( million) and percent ($ 2,010,000). The world39。s total penetration rate of % ( million Internet users). This growth rate will have several important implications, but a clear bandwidth abundant in the foreseeable future, neither, nor is insufficient bandwidth will be a more expected to balance the situation, parable rates, supply and demand will continue to grow. In addition, puter and network architecture will be strongly influenced by software programs will play an increasingly important role, because most of the data will stay local. file transfer will likely continue to dominate the flow through the media with realtime transmission more limited.Internet users in Asia and the population. Estimated the total population in the Asian region in 2003,6112 million (56%), 302 million Internet users, users increased by 164% (2000
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