Research On Resource Scheduling Algorithm In Industrial IoT Application Using IEEE802.15.4e TSCH

Industrial wireless sensor network applications need to face the following challenges.Firstly,the industrial environment is complex,the external interference and multipath fading phenomenon is more obvious.Secondly,industrial applications have stringent requirements on real-time(influenced by end to end delay).Thirdly,the node energy in wireless sensor networks is limited.And efficient resource scheduling strategy can improve network reliability through the rational allocation of time slots,channel resources,to reduce data transmission delay,reduce the sensor node energy consumption.Therefore,the study of resource scheduling policy has important practical significance for the application of industrial wireless sensor networks.In this paper,in order to reduce power consumption and delay during data transmission,and increase network capacity.We make a research of resource scheduling in industrial wireless sensor network,especially for the data with different sample rate.The main contributions of this thesis are as follows.1.Have a deep study of IEEE802.15.4e TSCH-a low power consumption and high reliability MAC layer mechanism.And give the detailed analysis of time synchronization,channel hopping principle,and TSCH deterministic scheduling mechanism.2.Considering the problem of scheduling delay-constrained periodic heterogeneous traffic in industrial wireless network.Combined with TSCH mode,we propose a traffic aware Multiple Slotframes scheduling algorithm.In order to meet the requirement of real-time of different sampling period,the algorithm based on the faster scan rate fisrt policy to schedule the network transmissions.In order to solve the problem of network interference and conflict,graph theory methods of matching and coloring are adopted to achieve deterministic communication resource allocation problems.Simulation results show that the algorithm can guarantee the reliability of data transmission and the performance of real-time.This can make full use of limited resources,increase the capacity of the network.3.Give the resource scheduling algorithm implementation.Described the TSCHnetwork architecture and the design of terminal node and gateway node.Based on the existing platform(MSP430 + CC2420)implements the network synchronization,join of equipments and resource scheduling.Comparison of experimental tests verified that multiple slotframes in a network to solve the problem of heterogeneous data resource scheduling can reduce power consumption and extend the network life;packet loss rate test show that the algorithm for the network can provide high reliability.In summary,this paper has a deep research on TSCH scheduling for industrail Io T applocations,and resource scheduling algorithm is proposed for different sample rate data in a same network.Simulation and experimental tests show that the algorithm can make full use of communication resources to increase network capacity,ensure the performance of real-time during date transmission,and the algorithm has high reliability and low power consumption.