基于TD-LTE系统的VoIP业务容量研究

VoIP capacity based on TD-LTE system

从AMR编码、LTE协议架构、半静态调度等多个方面,完整介绍Vo IP业务在TD-LTE网络中的数据包封装处理实现方式,并且较为详细地阐述TD-LTE系统中限制Vo IP业务容量的若干因素。在此基础上,提出了TD-LTE系统中语音业务容量在特定条件下的计算公式,建立了一套与之相应的容量模型,并以20M系统带宽为例进行了简单计算。力求在LTE无线网络规划中为解决Vo IP业务容量问题提供参考依据。

This paper introduces the whole process of data unit of voice over Internet protocol（ Vo IP） in LTE systems from several aspects,including adaptive multi-rate（ AMR） speech codec,LTE protocol frame and semi-persistent scheduling transmission. Moreover,it demonstrates a few factors which will restrict Vo IP capacity. It proposes a calculate formula of Vo IP capacity in special condition in TD-LTE system,and builds a corresponding capacity model,in which an example of 20 M band is calculated. All these content can be used to solve the problem of Vo IP capacity in TD-LTE network planning.