计算机工程2016，Vol.42Issue(11)：125-130,6.DOI:10.3969/j.issn.1000-3428.2016.11.021
衰落信道数据包传输跨层优化模型改进
Improvement of Cross-layer Optimization Model for Data Packet Transmission over Fading Channels
摘要
Abstract
In a single-input-single-output wireless data packet transmission system,the Markov Decision Process(MDP) model is generally used to obtain an optimal transmission rate control policy to reduce the packet loss rate.But in the existing model,the queue overflow packet loss is ignored,causing that the result obtained by model calculating is inaccurrate compared with the practical result.To resolve this problem,an improved cross-layer MDP model is proposed. In this model,a factor of queue overflow packets loss is introduced in the one-step transition reward function.A new optimal transmission rate control policy is obtained from the improved MDP model.Simulation results show that the optimal transmission rate control policy obtained from the improved MDP model is more accurate compared with the previous one and it reduces the simulation deviation error from 12% to 3% on average,yielding better optimal target value.关键词
有限状态马尔可夫信道/自适应调制和编码/速率控制/马尔可夫决策过程/跨层优化Key words
Finite State Markov Channel (FSMC)/Adaptive Modulation and Coding (AMC)/rate control/Markov Decision Process(MDP)/cross-layer optimization分类
信息技术与安全科学引用本文复制引用
冯正勇..衰落信道数据包传输跨层优化模型改进[J].计算机工程,2016,42(11):125-130,6.基金项目
国家自然科学基金青年基金“基于不确定规划理论的无线网络视频流传输研究”（61302119）；西华师范大学博士科研启动基金“异构无线网络流媒体传输 QOE优化”（13E003）；西华师范大学创新创业训练计划项目“物联网技术”（CXTD2014-12）。 （）
