The Analysis And Design Of FPGA-Based DP-CSMA/CA Protocol Control System With Binary Tree Conflict Resolution Algorithm In WSN

With the development of the "Internet of things","car networking" and "intelligent Home Furnishing network" and the rising and development of intelligent network, transmission task of wireless sensor nodes in all kinds of intelligent network is becoming increasingly complex, rapid growth in the amount of data transmission in sensor networks. Therefore, the application and optimization of the access technology of wireless sensor network becomes more and more realistic significance.The improved binary tree conflict resolution algorithm DP-CSMA/CA protocol in this paper is to explore the optimization of multiple access technology Through the use of probability interception probability sending, improved binary tree conflict resolution algorithm and a series of methods, this protocol achieve the performance optimization of the traditional random multiple access technology, provide the data transmission more efficient. At the same time, high transmission rate, low delay, low power consumption, high real-time and low cost index directly determines the performance of wireless sensor network. The system design of the FPGA is effective in improving the performance, reliability, flexibility based on wireless sensor network, and reduce the system cost, reduce the circuit board area, to ensure that the advanced programmable hardware technology, high performance and design flexibility, is more economical than the ASIC and ASSP design and the design of wireless sensor network for efficient solution. Therefore, improved binary tree conflict resolution algorithm DP-CSMA/CA protocol is the control optimization of wireless sensor networks, and the FPGA design is the hardware optimization of wireless sensor network.In this paper, based on the traditional CSMA multiple access communication technology, this paper proposed and designed a kind of improved multiple access protocol:improved binary tree conflict resolution algorithm of two-dimensional probabilistic DP-CSMA/CA communication protocol, according to the control mode of the protocol, design a kind of sensor network data transmission system with FPGA as carrier multiple access control system, to complete the inter site transport control sensor network. On this basis, this paper presents an implementation scheme of FPGA in the control system, using Altera company’s Cyclone series II FPGA as the core, uses the modular design, are implemented and retransmission detection data transmitting and receiving, the wireless sensor network node collision data frame, channel conflict improved binary tree conflict resolution algorithm and other functions. Finally, in the DE2development environment, each module is respectively the test of hardware and software to complete the system design. The system can transmit data correctly in the site of wireless sensor networks, which verifies the design of improved binary tree conflict resolution algorithm DP-CSMA/CA communication protocol. The design has the advantages of high throughput, low collision probability and the system can detect and decomposition of conflict.