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为了对长期演进项目LTE(Long Term Evolution)中引入的节能机制进行系统性能分析与参数优化,针对基于活动状态下的非连续接收机制DRX(Discontinuous Reception),考虑移动终端与基站之间的多个逻辑信道,建立一个多重同步休假排队模型.采用离散时间方法构造状态转移概率矩阵.基于系统的稳态分析结果,进行能量节省率,系统阻塞率和数据帧响应延迟等指标的性能研究.数值实验的结果表明,不同的性能指标之间存在着折中关系.通过建立利润函数,给出逻辑信道个数,休眠间隔及逻辑信道传输率等系统参数的优化设置方案.
In order to analyze the system performance and optimize the parameters of the energy-saving mechanism introduced in Long Term Evolution (LTE), aiming at DRX (Discontinuous Reception) based on DRX (Active Discontinuous Reception), considering the relationship between multiple mobile stations and base stations Logic channel and set up a model of multiple simultaneous vacation leave queues.The discrete-time method is used to construct the state transition probability matrix.The performance of energy saving rate, system blocking rate and data frame response delay are studied based on the steady-state analysis results of the system.Numerical experiments The results show that there are tradeoffs between different performance indexes.According to the profit function, the optimal settings of system parameters such as the number of logical channels, dormancy interval and logical channel transmission rate are given.