基于帕累托的LTE小基站PHY-MACAPI时间窗选择方法

A timing window selection method for PHY-MACAPI of LTE small cell based Pareto

针对协议栈子系统Linux的实时性引起协议栈任务运行时间具有抖动性而导致采用选择固定大小时间窗的传统方法降低协议栈处理效率的问题,在中科院计算所LTE协议栈的基础上,按照Femto Forum的应用程序接口(FAPI)提出了一种基于帕累托分布构建模型的方法,从而达到提高下行链路协议栈处理效率的目的。针对不同架构、主频等参数的LTE小基站的设计,根据该方法能够高效地选择适合自身的应用程序接口(API)时间窗。实际测试结果表明,与大多数厂家采用的固定时间窗的方法相比较,这种方法能够明显提升下行链路协议栈处理效率。本研究能够为动态时间窗的实现提供参考。

Considering that using the traditional method of selecting a cessed efficiency due to the jitter of the task runtime of protocol fixed-size timing window reduces the protocol-prostack eaused by the Linux real-time performance of protocol-staek subsystem,a method for constructing model based on Pareto distribution is presented on the basis of LTE（ long term evolution） protocol stack given by the Institute of Computing Technology of Chinese Academy of Sciences aecording to the FAPI （femto forum application programming interface ）to achieve the improvement of downlink protocol-processed efficieney. For the design of small cell of different architeetures, frequency and other parameters, the appropriate timing window could be quickly and aceurately selected according to the method. The test results illustrate that the proposed method works well, bringing an effective improvement of downlink protocol- processed efficiency, compared with the method of selecting a fixed-size timing window used by most manufacturers. This study is of referential significance to realization of dynamic timing window.