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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/8201


    Title: 支援跳頻之IEEE 802.15.4 ZigBee無線隨身網路機制設計與實現;The Implementation and Design of Frequency Hopping Mechanism for IEEE 802.15.4 ZigBee Wireless Personal Area Networks
    Authors: 黃鴻翔;Hung-Hsiang Huang
    Contributors: 通訊工程研究所
    Keywords: IEEE 802.15.4;個人無線網路;跳頻;ZigBee;Wireless Personal Area;IEEE 802.15.4;ZigBee;Frequency Hopping
    Date: 2007-07-09
    Issue Date: 2009-09-22 11:20:52 (UTC+8)
    Publisher: 國立中央大學圖書館
    Abstract: 近年來, Zigbee 網路的硬體通訊相關技術不斷的發展及日趨成熟,新的應用也如雨後春筍般不斷被提出,如、保全系統、醫療照護、家庭自動化等,然而在這些應用之中使用最為頻繁的頻段就是 ISM 的2.4GHz,但隨之而來問題卻是在同樣來自於2.4GHz其他網路之間的干擾,像是 Wi-Fi 、 Bluetooth 與微波爐等,這些設備因其功率與特性問題都會對 Zigbee 網路造成不同大小的干擾,其中又以目前使用最為廣泛的Wi-Fi對 Zigbee 的干擾最為嚴重。 在 Zigbee 標準與 IEEE802.15.4 的協定裡面並無明確的說明該如何解決其他異質網路的干擾問題,而面對功率強大的 Wi-Fi 網路,常常會造成 Zigbee 網路的 Throughput 的嚴重降低與 Access delay 的上升問題,進而使得整個網路必須被迫跳離原來的頻道,甚至更嚴重的重新建立網路。 然而在許多 Zigbee 網路的應用之中,如醫療照護與保全系統,這種情況往往是應用的致命傷,因此如何能過使 Zigbee 網路能夠不被其他的網路干擾變成為一個非常值得去研究與實作的問題,此時跳頻的理念就在此時顯得格外的重要了。 The development of ZigBee is to grow up day by day. The new application was produce constantly such as, Security system, Healthy caring system, Home automation etc. The band used most of this application is 2.4GHz ISM band. But the problem of Zigbee is the interference from other system at 2.4GHz. such as Wi-Fi, Bluetooth, Microwave oven and etc. One of the most interference is Wi-Fi. There is no mechanism of frequency hopping in the ZigBee specification when suffered from the interference of Wi-Fi. The result of ZigBee interfered by Wi-Fi result in throughput degrade and access delay increase. And force change the original channel and rebuild a PAN. . This problem is A fatal wound in many application of ZigBee. For this reason, how to make the ZigBee network was not be inference by other system is a good object for research and implement. The concept of frequency hopping is important.
    Appears in Collections:[Graduate Institute of Communication Engineering] Electronic Thesis & Dissertation

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