基于短距无线的低压用户停电事件突发上报拥塞规避机制研究

低压用户侧停电事件的精准分析依赖于表计设备停电上报的实时性与可靠性。文章介绍了一种适用于多用户停电事件突发上报的自组网微功率无线拥塞规避机制。该机制运行于自组网子网代理协调器媒介访问控制协议之上,在电能表停电事件报文上传初期设置等待期,充分接收电能表及其他子网内设备停电事件报文,并在等待期后通过比特映射方式将接收的停电事件统一上报给集中器;该机制的等待期参数设置能够充分适应突发报文所需的媒介竞争时间,从而降低了报文的丢包率和等待时延;通过仿真分析可知,提出的拥塞机制可以有效提高系统本地通信网数据传输的时效性和可靠性。

Research on congestion avoidance mechanism for burst report of power failure based on short distance wireless communications

The accurate analysis of low-voltage user-side power failure events relies on the real-time and reliable reception of associated reports from metering devices.Therefore,this paper introduces an ad-hoc micro-power wireless congestion avoidance mechanism which is suitable for the burst reports of multi-user power failure event.The mechanism runs on the top of media access control protocol in the agent coordinator of subnet of an ad-hoc network.It proposes to set a waiting period at the initial stage of reporting the power failure event to gather the packets of meters,following by which forwarding the received packets to the concentrator in a bitmap manner during a transmission period.The waiting period enables the agent coordinator fully adapt to the media competition time required by the burst packets from the metering devices,and thus can reduce the packet loss rate and waiting delay.The simulation results show that the proposed congestion avoidance mechanism can effectively improve the timeliness and reliability of local communication network.