智能配电网中异构无线网络负载均衡算法

Load Balancing Algorithm in Heterogeneous Wireless Networks for Smart Distribution Grid

为提高智能配电通信业务的服务质量,在智能配电通信网接入层建立了异构网络模型,并对智能配电通信业务进行优先级划分,进而提出一种基于物元分析的异构无线网络负载均衡算法。构造了待评价物元模型,并结合熵权法得到的各指标权重,获取各备选网络关于各个等级的关联度,选择关联度最大的等级描述当前网络质量。针对不同优先级业务,按照优先级从高至低依次将其接入到当前网络等级最优的网络,为不同优先级业务提供有差别的服务。仿真结果表明,该算法在有效均衡异构网络间负载的同时,能够降低配电通信业务的阻塞率,为智能配电通信业务提供可靠、经济、高效的服务。

To improve communication services in the quality of service （QoS） of smart distribution grid （SDG）, a heterogeneous network model in the access layer of SDG was presented, and the priorities of communication services in SDG were divided by their different QoS requirements. Accordingly, a load balancing algorithm based on the matter-element analysis in heterogeneous wireless networks was proposed. The matter-element model to be evaluated was constructed and the evaluation index weight was obtained combining with using entropy weight method, and the correlation degrees of candidate networks about different grades were calculated. The maximum correlation degree of each network about different grades was selected to describe the network quality. In accordance with the priorities which are ranged from high to low, new communication services in SDG were accessed to the network with the optimal quality in turn, therefore the services with different priorities were differently served. Simulation results show that the algorithm can effectively balance the loads among the overall heterogeneous system, and simultaneously can decrease the service ＇blocking probability. Consequently, the proposed algorithm can provide reliable, economical and efficient communication service for various services in SDG.