数字无中心系统中数据传输的设计与实现

DESIGN AND REALIZATION OF DATA TRANSMISSION IN DIGITAL CENTRELESS SYSTEM

根据数字无中心多信道选址移动通信的原理,结合欧洲ETSI的DPMR协议标准,设计了一套适合900MHz无中心系统链路层数据传输模型。以低速数据(短消息)的传输过程为例,详细阐述了系统模型中数据传输的随路信令及数据传输的设计思路和实现过程。模块已通过测试,并取得了良好的效果。设计模块可广泛应用于公安、机场、医院及建筑工地等有无线对讲和低速数据传输业务要求的工作群体中。

This paper introduces the rationale of land mobile communication system requirements using multi-channel access techniques without a central controller. Combining the DPMR （Peer-to-Peer Digital Private Mobile Radio） protocol standard of European ETSI, a new model for link layer data transmission which is suitable for the 900MHz land mobile communication centreless system is designed. Then taking the transmission of low speed data （text massage） as example,the channel signalling of data transmission in the system model and the design schemes and implementation process of data transmission are described in detail. The module has passed the test and was performed well. This module can be widely used in the workgroups where the wireless communication and low speed data transmission services are required, such as the police, aerodrome, hospital, construction site and so on.