What factors have caused the difference between the WirelessHART standard and the OSl model?
* Question
| What factors have caused the difference between the WirelessHART standard and the OSl model? |
* Answer
| (1) Power supply power consumption is a major issue that needs to be considered in embedded systems.WirelessHART field devices are typically battery powered, so supporting a full Layer 7 protocol stack is not the best solution.
(2) Speed and size The processor and memory size of an embedded system is usually small.Therefore, many very complex security technologies have been developed.WirelessHART uses a 128-bit encryption algorithm and a CCM authentication algorithm at both the data link layer and the network layer. (4) Another important requirement in real-time embedded systems is the guaranteed delivery of network data. |
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