Research On Service Scheduling Strategy Based On Broadband Micro-power Networks

With the development of the smart grid,the Broadband Micro-power networks using broadband communication technology has become one of the development trends of electricity information acquisition system.Broadband communication technology has the characteristics of high bandwidth and low delay,which can meet more application scenarios and service requirements of the electricity information acquisition system,and this leads to scheduling problems when a large amount of service data is transmitted in the Broadband Micro-power networks.Firstly,this thesis improves the service functions of broadband micro-power networks on the existing basis.secondly,perform unit testing and system integration testing on the improved service functions;finally,the following research is conducted on the scheduling problem of a large amount of service data transmission.The traditional packet scheduling strategy usually only considers a single factor to schedule the packets in the queue,which cannot meet the different requirements of different services for delay and transmission success rate.To solve this problem,first of all,the Analytic Hierarchy Process is used to assign static priorities to services based on their relative importance.Then a packet scheduling strategy based on dynamic priority is proposed.The scheduling strategy adopts a multi-level queue management mechanism to give priority to the transmission of emergency service data and maintain the fairness of transmission among other service data.Finally,the proposed packet scheduling strategy is implemented and verified in the Broadband Micro-power networks.Experimental results show that,compared with the traditional packet scheduling strategies,the proposed strategy improves the success rate of network services,reduces the time spent on emergency services,and ensures the fairness between different priority services.The Broadband Micro-power networks implemented based on the tree topology have a large amount of service data transmitted in the upstream direction,and congestion problems are prone to occur near the sink node.Therefore,a congestion control strategy for Broadband Micro-power networks is proposed.The strategy first evaluates the congestion degree of the node according to the queue length and the change rate of the queue length;then in order to reduce the consumption of air interface resources,an implicit congestion notification mechanism is adopted;finally,the nodes are divided into different congestion states according to the congestion of the next hop node,according to the different congestion states,the congestion is alleviated by optimizing CSMA/CA protocol and controlling the input rate of nodes.Experimental results show that the proposed strategy improves the throughput,reduces the packet loss rate of the network,and ensures the fairness between different nodes.This thesis starts from the service requirements of Broadband Micro-power networks,first,improves the service functions,and then the queuing problems and congestion problems encountered in the service scheduling process are discussed,finally service scheduling strategies are proposed to solve the above problems,which lays the foundation for the further application of Broadband Micro-power networks.