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Механика. Динамика

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Механика. Динамика
Наименование:

An insight to WiMAX and case study of WiMAX projects in Pakistan and Macedonia WiMAX - survey and case studies.

Формат:      Страниц 112
     мягкая обложка
Автор:
Rida L.    
Издательство:
Книга по Требованию    
Год:2010
Цена:
2008 руб
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The objective of this research is to learn more about WiMAX and contribute in this field. WiMAX is thought to be an efficient solution for providing Internet access in developing countries. WiMAX provides for a variety of transmission modes, such fixed, nomadic and mobile access. Due to the ever-increasing demand for multimedia and Internet applications in today’s modern society, an important technology is thought to be Broadband Wireless Access (BWA), for which the IEEE has produced the 802. 16 group of standards. It is said that WiMAX usage is very cost effective for the last mile access, which is one of the most challenging parts of transmission in the network. The term WiMAX was created by the WiMAX Forum, which actually does the testing and gives the certificates of WiMAX conform equipment. We can say that the relation of the WiMAX term to the IEEE 802. 16 standard is the same as the relation of the term WiFi to the IEEE 802. 11. WiMAX, is a wireless digital communications system, primarily intended for wireless "metropolitan area networks".
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Развертывание сетей WIMAX
Технологии WiMAX позволяют быстро прогрессировать, как мобильным, так и фиксированный операторам, в том числе - новым операторам, начинающим свою деятельность с чистого листа. Сегодня уже развернуто 475 WiMAX сетей в 140 странах. Много операторов в России и в других странах СНГ. Около полумиллиарда человек проживают в зоне действия операторов WiMAX или на территории, где действуют лицензии WiMAX. А через год таких людей будет 800 миллионов. Международная некоммерческая ассоциация WiMAX-форум объединяет более 400 компаний - разработчиков элементной базы, оборудования, операторов связи всех видов, а также «экосистему WiMAX. Системы третьего поколения мобильной связи ЗG реализуются на базе новые радиотехнологии, обеспечивающей высокую скорость передачи мультимедийной информации и беспроводной доступ в Интернет не уступающий сервису провайдеров стационарной сети. Система мобильной связи 3G развиваются в двух направлениях: UM S и cdma 2000. UM S обеспечивает преемственность GPRS и GSM разрабатываются технологии повышения пропускной способности от абонента к базовой станции, направлений передачи информации технологии HSDPA и HSUPA.


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