further study on architecture and simulation mechanism of the large scale simulation platform COOJA, pleted accepting strength prediction, packet error rate calculation and some other functions. Integrate the channel model into the original channel in COOJA simulation platform, there exits large difference to the original channel prediction model prediction.We established wireless sensor network scenario covering 500 nodes. Because of the calculation complexity of the designed channel is higher; the overall simulation efficiency is slightly lower. But the channel predictionmodel is more rationality, and it can be one of choices of the channel models for COOJA wireless work simulation.Keywords:COOJA,Contiki OS,WSN,Rice distribution,Plane-Earth
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