z wave basics

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z-wave frame structure

z-wave frame types 
As shown in the fig-1, z-wave frame consists of a preamble part, SOF(Start of Frame), Frame data and EOF(End of Frame) symbol. The data part is manchester codes or NRZ coded based on data rate. MAC layer controls the RF spectrum. Data part comes from the upper layers and z-wave frame as mentioned in formed at the MAC/PHY layers. After this is done the z-wave frame as depicted is transmitted by the RF antenna after necessary radio frequency conversion as desired using RF Transceiver. For details on z-wave frame structure as well as various z-wave MAC layer frame types,
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z-wave protocol stack

The z-wave protocol stack consists of PHY layer, MAC layer, Transport layer, Network layer and application layer. Other than servicing their peers all the layers have their own tasks. 
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z-wave Physical layer(zwave PHY)

The z-wave Physical layer takes care of preamble insertion in the z-wave frame. It takes care of modulation and demodulation as well as RF channel selection. It takes care of data frame transmission and reception. 
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z-wave security

As z-wave open protocol architecture does not specify security layer specifications it is implementation specific. z-wave security layer provides secured communication between nodes as well as between controllers and nodes. 

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z wave basics

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