摘要
目前基于局部信息选择中继节点协作性能不佳,兼顾传输效率无法兼顾能量损耗,或兼顾两者却造成中继节点的碰撞概率大,为此提出一种改进型的认知无线电频谱管理算法。在DTR协议基础上改进传输数据时延,避开所有时延相等且为一个时隙的不符合现实情况的现象;在局部信息协调中引入博弈思想和门限策略,博弈出更优化的信道接入策略,提高传输速率及吞吐量。实验结果表明,与传统的DTR协议算法相比,该算法在数据传输时延方面有明显优势且更稳定,平均吞吐量在一定信噪比条件下远大于传统DTR协议算法,性能优越,实用性强,可有效应用于认知无线电频谱管理。
For the poor collaborative performance of the relaying node based on local information choice,and the energy transfer efficiency and energy losses can not be balanced,or considering both factors causes big collision probability problem of relay nodes,an improved spectrum management algorithm for cognitive radio system was proposed.Data transfer delay based on the protocol of DTR was improved,and the unreal phenomenon of entire equal delay and one slot was avoided.Game ideas and a threshold policy at the local information coordination were introduced,and a more optimal channel access policy was gamed to improve the transmission rate and throughput.Results of simulation show that compared with traditional DTR protocol algorithm,the proposed algorithm has significantly smaller delay and more stable performance on the data transmission,and the average throughput under certain SNR conditions is much larger,the IDTR algorithm has better performance and it is more practical.
出处
《计算机工程与设计》
北大核心
2016年第5期1181-1186,1216,共7页
Computer Engineering and Design
基金
河北省教育厅基金项目(N2014116)
