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目前自动车辆定位系统存在容量少，报警碰撞和精度低等缺陷．因此，对自动车辆定位系统和时隙ＡＬＯＨＡ（ＳＡＬＯＨＡ）的特点进行了分析研究，提出了广播预约ＡＬＯＨＡ（ＢＲＡＬＯＨＡ）这一新的数据链路设计方法，即基站广播差分信息，子站预约传输位置等信息和平滑接收机噪声等．其集中控制策略，吞吐量负载性能以及时延吞吐量性能表明，它适宜于设计大容量高精度自动车辆定位系统．
At present, the existence of automatic vehicle positioning system with less capacity, alarm collision and low accuracy defects. Therefore, the characteristics of automatic vehicle location system and time slot ALOHA (SALOHA) are analyzed and studied, and a new data link design method of broadcast reservation ALOHA (BRALOHA) is proposed, that is, the base station broadcasts differential information, and the substation reservation transmission location And other information and smooth receiver noise. Its centralized control strategy, throughput load performance and latency throughput performance indicate that it is suitable for the design of large-capacity high-precision automatic vehicle positioning system.