Research On Home Intelligent Network Control System Based On Broadband Carrier And Bluetooth Technology

The development of smart home,to a great extent,meets the requirements of comfort,convenience,experience and intelligence.Based on broadband power line carrier technology and ad hoc network technology,a home intelligent networking control system is designed,which makes electrical equipment a reliable communications network.Application of GPRS technology and Bluetooth technology makes the control terminal get rid of the position restriction.So control orders can be issued anywhere and anytime.The control system consists of main equipment,sub-equipment and intelligent switch.The thesis first describes the development of smart home.By comparing the broadband power line carrier communication technology used in this article with the common smart home communication methods,it is concluded that this method is the most economical,fast and reliable communication method.Based on the OSI model,a communication network between the master and slave devices is designed:Based on the comparison of modulation methods,an OFDM method of replacing low-speed sub-data streams with original high-speed data signals is selected;based on AODV routing algorithm,a self-organizing network algorithm is designed to compose tree network topology based on broadcast and unicast.;based on the structure of communication protocol stack,the encapsulation process of message is designed.;based on TDMA and CSMA/CA technology,the channel access mechanism was designed.The multiplexing mechanism of interweaving communication protocol frames into different time periods and cooperating channel monitoring is designed,which realized the maximization of communication quality and efficiency.Based on the overall design scheme of the control system,the hardware part of the system is completed.In Altium Designer,the function modules of the system are drawn,which includes GPRS module,Bluetooth communication module,carrier communication signal processing module,interface conversion module,zero detection module,power conversion module,carrier receiving band pass filter module and power amplifier module.I also make corresponding improvements to the circuit for problems that will occur in practice.By combining these modules,the design of the main equipment,the equipment and the terminal module is completed.Based on the communication scheme of the system,the software part of the control system of the home intelligent network control system is designed,which includes Bluetooth communication between sub-equipment and terminals,carrier communication and the establishment of network between main equipment and sub-equipment,and the GPRS communication between the host computer and the main equipment.According to the functional requirements,the PC part of the system and the control part of the mobile phone are designedFinally,through the analysis of the test waveforms captured by oscilloscope,verify the feasibility of whole home intelligent network control system.Then the paper gives a summary of the control system and the prospect of the next generation of products,which will be more intelligent and have more control forms.