Research And Design Of Complementary Nodes Communication Model Based On Internet Of Things

With the development of wireless communication,sensor technology,embedded application and microelectronics technology,wireless sensor network can obtain required information at any time,anywhere and under any environmental conditions,laying a foundation for the rapid response development of the Internet of things.Based on the characteristics of Internet of things communication,this thesis focuses on the design of fast response communication protocol,and proposes a dual protocol operation model of microgrid complementary nodes.The multi-channel MAC protocol and burst alarm protocol of wireless sensor networks under normal transmission The Realize the synergy between the nodes in the micro grid system,and can make a quick response to the system events.Firstly,the existing wireless sensor channel protocol is analyzed,and after negotiation,the parallel negotiation multi-channel MAC protocol is selected to communicate.The multi-channel MAC protocol effectively utilizes the existing channel resources.In the wireless sensor network,multi-channel data exchange between nodes can not only reduce the collision and interference problems in the data exchange process,but also improve the whole wireless sensor network Communication performance.Based on the analysis of the complementary model and the existing parallel negotiation MAC protocol,a parallel negotiation multi-channel MAC protocol,the RTMAC protocol,is designed based on the random time slice.The protocol introduces the time slice mechanism and It is effective to solve the problem of communication collision between traditional multi-channel MAC protocol and unfairness of node communication in network,which has the advantages of low power consumption,high throughput and high reliability.Second,the design of the emergency alarm case based on the CDMA MAC protocol,because the alarm requires a quick response,so do not use any way backwards.In particular,the MAC protocol of the parallel negotiation class avoids the bottleneck of the control channel without ensuring the communication overhead.Based on the background of packet-switched multi-code CDMA system,the CDMA communication model is simulated based on Matlab,and it is assumed that multiple data users can transmit in parallel,and the non-collision CDMA MAC protocol is analyzed.Finally,the transmission time of single-hop network is preliminary simulated.