基于电力无线专网的海量数据并发接入性能分析

Massive Access Performance Analysis for Electric Dedicated Cellular Networks

摘要: LTE系统随机接入是电力无线专网海量数据并发采集的主要瓶颈。随着配网、计量自动化终端数量的迅速增加，无线接入延时、阻塞等因素势必影响数据的实时有效传输。介绍了LTE随机接入流程，分析了针对智能电网应用场景下的局限性。建立随机接入仿真平台，评估随着终端数量增加阻塞率、接入延时、平均重传次数三个主要指标的变化，得到接入系统的参数配置原则。

Abstract: LTE-based random access process becomes the bottleneck for tremendous increase of distribution/metering terminals in smart grid, since the access delay and block probability may degrade the real-time effective data collections. This paper introduces the main process of random access in LTE, then the limitation in smart grid is analyzed. The simulation platform for random access is established to evaluate the performance with the key indicators, such as block probability, access delay, the average number of preamble retransmissions. Finally, the principle for parameter configuration is proposed.