基于加权队列的无线智能电网通信网采集数据流量调度算法
doi: 10.3724/SP.J.1146.2013.01050
Traffic Scheduling Algorithm Based on Weighted Queue for Meter Data Collection in Wireless Smart Grid Communication Network
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摘要: 智能电网的关键技术之一是为电力数据采集提供一个高效、可靠、安全的双向通信系统。使用具有通信能力的先进电力计量设备(智能电表)组成无线mesh网络采集数据,存在应用层数据流量对网络通信性能的挑战,当大量数据流量突发时,与本地局域网关较近的智能电表将面临较大的通信压力,可能产生严重的数据拥塞。为此,该文基于多网关联合的思想,提出一个新的基于加权队列的流量调度算法以缓解拥塞。首先,对多网关联合网络进行分析,确定影响网络性能的主要因素。其次采用队列加权的方法,提出新的流量调度算法。最后进行网络仿真,相对其它算法,该文所提算法能够极大缓解数据突发时刻的系统拥塞,有效地降低时延,同时在系统各网关吞吐量之间取得良好的平衡,能够提高采集网络的通信性能。Abstract: One of the key technologies in smart grid is an efficient, reliable and secure two-way communication system for meter data collection. Forming wireless mesh network with advanced electricity devices (smart meters), which have the communication capabilities for meter data collection, faces challenge on network communication performance caused by application layer data traffic. When a large number of data occur in emergence, the smart meter near the local LAN gateway faces great communicaton pressure, and it probably leads to extreme data congestion. Therefore, a new traffic scheduling algorithm is proposed based on the idea of the joint of muti-gateway to release the congestion of system. First, the muti-gateway mesh network is analyzed to study the main factors affecting network performance. Second, a new traffic scheduling algorithm is proposed with the idea of weighted queue of node. Simulation data show that compared with other algorithms, the new algorithm can release significantly the congestion of burst data, and it reduces effectively the latency and obtains a good balance among the throughput of the system gateways, which can improve the network communication performance.
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