联合包调度频谱切换和功率分配的跨层设计方案  

Joint Packet Scheduling Spectrum Handoff and Power Allocation for Cross-layer Design Scheme

作　　者：杜奕航 王可人[1] 焦传海 

机构地区：[1]解放军电子工程学院,安徽合肥230037 [2]解放军陆军军官学院,安徽合肥230031

出　　处：《探测与控制学报》2017年第1期116-121,共6页Journal of Detection & Control

基　　金：安徽省自然科学基金青年科学基金项目资助(1608085QF143)

摘　　要：针对认知无线网络频谱切换造成系统吞吐量损失和切换延迟较大的问题,提出了联合包调度频谱切换和功率分配的跨层设计方案。该方案根据连续时间马尔科夫链模型预测信道状态信息,调度器采用包调度算法对预繁忙信道次用户进行调度,并重新分配认知节点功率以提升系统吞吐量。仿真结果表明,相对于传统频谱切换算法,该方案可在降低认知用户中断率的同时使系统吞吐量提升约5%。Aiming at the problem of system throughput loss caused by spectrum hand-off and long delay time of switching,the joint packet scheduling spectrum hand-off and power allocation scheme for cross-layer design scheme was proposed.The scheme predicted the channel state based on the continuous-time Markov chain of primary users＇ channels.The scheduler adopted packet scheduling algorithm for scheduling the secondary users of the pre-busy channel and reallocation power of the cognitive nodes to maximize the system throughput.Simulation results showed that the proposed scheme could reduce the cognitive users＇ interruption rate while increasing system throughput by about 5%.

关 键 词：主动频谱切换 认知无线网络 跨层设计 包调度算法 

分 类 号：TN92[电子电信—通信与信息系统]