Research On Autonomous Resource Scheduling Method Of 6TiSCH Network Based On Queue Model

6Ti SCH（IPv6 over the TSCH Mode of IEEE 802.15.4e）is an IPv6 wireless network in IEEE 802.15.4e TSCH mode.TSCH mode supports low power consumption based on precise time synchronization between nodes and high reliability based on channel frequency hopping.6Ti SCH Network resource scheduling Reduces packet delay,node power consumption,and packet loss rate by allocating slot and channel resources.Resource demand calculation and resource selection are the key to 6Ti SCH network resource scheduling.Considering that a large part of the resource consumption in the network comes from the interaction of neighbor information between nodes,this paper studies the autonomous network resource scheduling method based on the node’s own parameters.The main work is as follows:1.For the design of the resource scheduling method,the 6Ti SCH network architecture and key technologies of resource scheduling are analyzed,and the IEEE 802.15.4e TSCH mode and 6top（6Ti SCH Operation Sublayer）protocol of the data link layer related to resource scheduling are mainly studied.2.In view of the possible waste of resources in the exchange of neighbor information between nodes,and the problems of packet loss and resource over-allocation that may be caused by not considering the length of the cache queue.Based on queuing theory,an autonomous node queuing system mathematical model is established for a single node.According to the mathematical model,an autonomous node resource demand calculation method based on the queue model is proposed,and the performance of the method is analyzed and tested.3.For the inter-node interference,delay and traffic bottleneck problems in the 6Ti SCH network.This paper proposes a time slot frame proportional grouping mechanism based on the RPL（IPv6 Routing Protocol for LLNs）Rank value,and then optimizes the grouping selection according to the neighbor density,and proposes a 6Ti SCH network resource selection method based on the time slot frame proportional grouping,and the method was analyzed and tested.4.Combining the resource requirement calculation and resource selection method,a queuing model-based 6Ti SCH network autonomous resource scheduling method is proposed,and the method is tested and analyzed on the simulation platform and the 6Ti SCH experimental platform based on openmote-B.The autonomous resource scheduling method for 6Ti SCH network based on the queue model proposed in this study can accurately calculate the mathematical expectation of the number of node resource requirements,and select local conflict-free time slot resources,thereby effectively reducing the transmission delay,packet loss rate and energy efficiency of data packets.consumption.The test results on the 6Ti SCH hardware experimental platform show that compared with the standard MSF scheduling method,under the same network environment,the transmission success rate of the proposed method is increased by3%on average,and the time spent transmitting 30 application data packets to the destination node is reduced on average.In 39.97s,transmitting 30 application data packets on a two-hop link can reduce energy consumption by 5.94*10^-4J.