智能配电网WMNs数据分类传输的延时性能评估分析

Delay performance evaluation and analysis of data classification transmission for WMNs applied in smart distribution grid

针对大规模无线先进测量仪表在智能配电网应用时,无法实现对不同类型传输数据的延时性能进行分别评估分析的不足,提出了一种保证实时性需求的射频网状网络(WMNs)数据分类传输的延时性能评估方法。在分析智能配电网WMNs架构基础上,借助马尔科夫链调制手段,建立起前后两个连续时隙起始阶段之间函数关系。为避免在求取稳态解过程中解高阶微分方程的困难,给出了一种基于误差迭代求取稳态工作点的求解方法并给出详细求解流程。在稳态工作点求出的基础之上,进一步建立实时性数据和非实时性数据在上行、下行传输过程中平均延时性能评估分析解析式。为了验证所提出的智能配电网WMNs延时性能评估方法有效性,分别对实时性数据和非实时数据在3种不同的传输率环境下延时性能进行仿真测试。实验仿真和测试结果表明,所提出的方法,能够实现对智能配电网不同类型的通信数据的传输延时进行性能评估分析,而且能够提射频网状网络的传输性能。

A mathematical method is proposed to evaluate the delay performance of RF-Mesh-Networks that can realize data classification transmission and ensure real-time data requirements,for deficiency in evaluating and analyzing the delay performance of different types of transmission data when the large-scale wireless advanced measurement instruments are applied in smart distribution grid.Based on the analysis of the WMNs architecture of the smart distribution grid,the functional relationship between the initiation stages of the two consecutive time slots is established using Markov chain modulation techniques.In order to avoid the difficulty of solving high-order differential equations during the process of obtaining steady-state solutions,the solution method based on error iteration to obtain steadystate operating points is proposed,and the detailed solution process is also provided.On the basis of obtaining the steady-state working point,the analytical formula to evaluate the average delay performance of real-time data and non-real-time data for uplink and downlink transmission.To verify the effectiveness of the proposed delay performance evaluation method for WMNs applied in smart distribution grid,the delay performance of real-time and non-real-time data is simulated and tested,where they are set up three different transmission rates.The experimental simulation and test results show that the proposed method can achieve performance evaluation and analysis of transmission delay for different types of communication data in intelligent distribution networks,and can improve the transmission performance of WMNs.