TETRA分组数据业务随机接入延迟计算

Deduction of Random Access Delay of TETRA Packet Data Service

数字集群系统的参数设计和网络负荷对分组数据业务的延迟具有很大的影响。首先详细分析了陆地集群无线通信(TETRA)分组数据业务在空中接口的发送过程,然后分析了TETRA协议的随机接入算法,最后对分组数据采用离散接入帧进行随机接入的延迟进行了推导,得到了随机接入延迟与相关参数的关系表达式,并对接入延迟与参数的关系进行了分析,对TETRA集群系统的设计具有指导意义。

In digital trunked system,the delay performance of packet data service is greatly affected by the design of system’s parameters and the network load.In this paper,we particularly analyze the transmitting process of the TErrestrial Trunked Radio （TETRA） packet data service via the air interface.Then,we analyze the random access algorithm of TETRA protocol.Finally,we deduce the delay of packet data during the random access with discrete access frames.We gain and analyze the relationships of random access delay and correlative parameters.The paper has guiding significance for design of the TETRA trunked system.