一种认知无线电的智能电网通信业务数据分组调度机制

A Packet Scheduling Mechanism on Cognitive Radio Networks for Smart Grid

为了合理高效地利用现有无线频谱资源,保障智能电网中重要控制类信息传输质量的同时,尽可能地为其他业务提供相对高质量的服务,提出了一种智能电网认知无线传感器网络基于优先级的数据分组调度机制.该机制基于差异化调度策略的思想,依据智能电力通信网流量的异构特性、业务特点和服务质量要求,为智能电力通信业务划分了优先级,进而对各个优先级设置了不同的策略,并重点考虑信道质量和信道切换造成的影响.通过Matlab软件仿真验证,基于业务优先级的数据分组调度方案有效地提高了较高优先级次级用户数据分组的传输性能,对整个系统的利用率也有所提升.

To achieve rational and efficient usage of radio spectrum, a priority-based packet scheduling mechanism on cognitive radio sensor networks for smart grid was presented. It provides higher priority secondary user packets with relatively high quality of service （QoS） without interfering the transmission of important business for network control. Based on differentiated scheduling method, communication traffic in smart grid was classified into several priority classes according to characteristics and QoS requirements of heterogeneous business. And then, a radio spectrum allocation strategy was formulated which consid- ered the effect of channel quality and the cost of switch. Simulation was implemented to evaluate the mechanism by using Matlab. The simulation results show that the transmission quality of the higher-priori- ty secondary users is improved by adopting the proposed priority-based packet scheduling mechanism and the overall system utilization is increased as well.