無線局域網(wǎng)外文翻譯-其他專業(yè)(編輯修改稿)
2025-02-24 12:15 本頁面
【文章內(nèi)容簡介】 study of the state of the art of WSNs and both standards can be found in [2] and [3]. A WSN consists of tiny sensor nodes, sink nodes, an information transport work and personal puters. Usually, WSN architecture consists of three layers, the physical layer, the MAC layer and the application layer. The standard deals with LowRate Wireless Personal Area Networks(LRWPAN)。 its aim is to standardize the two lower layers of OSI protocol stack, layer and medium access control layer. It only considers star and peertopeer work topologies. On the other hand , ZigBee defines the upper layers, work and application layers, its main contribution is to provide the ability of forming cluster,tree and mesh work topologies to applications As regards the lighting control protocol, it can be chosen between an open protocol,like TCP/IP , BACNet, DMX512,LONWorks,X10, 010 V or DALI, or stands for Digital Addressable Lighting Interface, it was defined by annex of IEC 60929 as a digital signal controller for tubular fluorescent lamp ballasts39。 control interface and modified by IEC 62386, which also integrates other application of DALI apart from lighting and extends the kind of lamp to high intensity discharge (HID), halogens, incandescent, LEDs,etc. This paper focuses on developing a street lighting management system by making use of wireless sensor works and DALI ballasts, materials used in the sy
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