| Packet loss is one of the common phenomenon in wireless sensor networks. In order to reducethe packet loss rate which caused by various factors in the data acquisition system of the WSNs, thispaper constructs a cooperation framework of the wireless sensor network, and puts forward anapproach of network coding based on the wireless data transmission compensation mechanism. Thismechanism designs a collaboration node, which generates a coding packet through coding the packetsfrom the acquisition nodes. And then sending the coding packet to the base-station is to compensatethe acquisition nodes data loss. To ensure the reliable and real-time data collection, TDMA(TimeDivision Multiple Access) and CSMA/CA(Carrier Sense Multiple Access with Collision Avoidance)have been adopted. Through the simulation, it can verify the stability of this framework and theeffectiveness of the the data transmission compensation mechanism. Then, it should need to programthe cooperation node and the base-station. The experiments show the correctness of this datatransmission compensation mechanism. Finally, it should need to program epistatic machine.Ensuring the PC coding solvability premise, the experiments verify the effectiveness of theframework and data transmission compensation mechanism, and show that, with a high samplingfrequency of the acquisition node and no effect on delay of the framework, adding the cooperationnode can not only raise the utilization rate of the channel, but also improve the reliability of wirelessdata transmission. |
