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 Energy Conservation Protocols for Wireless Data Networks. Techniques and Algorithms
Наименование:

Energy Conservation Protocols for Wireless Data Networks. Techniques and Algorithms

автор John S. издательство Книга по Требованию Механика. Динамика
Cтраниц 196        мягкая обложка       
Аннотация:In the former, it compares methods of scheduling, methods of announcing schedules, and various access techniques. First, MAC protocols should put nodes not participating in data exchanges into a low energy state. This thesis studies the use of wireless medium access control (MAC) protocols to conserve energy in wireless portable radios, in both centrally controlled and ad hoc networks. SCR assumes nodes are synchronized and thus can contend simultaneously. The predictability of SCR simplifies the implementation of energy conservation mechanisms. It concludes that there are two primary objectives. Second, information that enables these nodes to enter these states must be provided quickly. As a result, we created a new MAC protocol called Synchronous Collision Resolution (SCR). These objectives are not easily applied in ad hoc networks because most ad hoc MAC protocols rely on temporally random access techniques. Additionally, SCR orchestrates spatial reuse of spectrum, enables the effective use of multiple channels, arbitrates access based on priority and enables reservations for streaming. A collision resolution signaling mechanism resolves contentions.
Автор: John S.
Издательство: Книга по Требованию
Год:2009
Цена:
2783 руб
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Поиск: Energy Conservation Protocols for Wireless Data Networks. Techniques and Algorithms
НОВЫЙ ГОД СИМВОЛ 2013 ГОДАУКРАШЕНИЯ
КАРНАВАЛ НА НОВЫЙ ГОД РАСПРОДАЖА
Ортомолекулярная медицина Orthomol Устрание причин заболеваний. Ортомоль это новый метод для лечения и профилактики болезней. Orthomol - ортомолекулярная медицина.
Электромагнитная совместимость сотовых сетей связи

Прежде всего, следует упомянуть приложения так называемой "беспроводной последней мили" (Wireless Local Loop, WLL). Такое приложение реализуется в "фиксированных" сетях, не поддерживающих мобильных абонентов. Следует, впрочем, подчеркнуть, что совершенно неподвижными абоненты таких сетей быть не обязаны, - допускается, например, перемещение с места на место в пределах территории, на которой развернута сеть. Наибольший интерес к фиксированным сетям проявляют компании-операторы из развивающихся стран, где необходимо быстро обеспечить связь на большой территории, и на прокладку разветвленной кабельной сети просто нет времени. Помимо недостаточно развитой коммуникационной инфраструктуры, существует и еще одна причина интереса к беспроводным технологиям "последней мили" - большие расстояния. Этот фактор не зависит от уровня экономического развития страны - проложить кабель к удаленному ранчо в Соединенных Штатах ничуть не дешевле (а скорее всего, значительно дороже), чем к какой-нибудь глухой российской деревушке на десять домов.
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