| 大容量高精度自动车辆定位系统数据链路设计 |
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| 引用本文： | 吴少淳.大容量高精度自动车辆定位系统数据链路设计[J].北京航空航天大学学报,1998,24(2):145-148. |
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| 作者姓名： | 吴少淳 |
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| 作者单位： | 北京航空航天大学 电子工程系 |
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| 摘 要： | 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.
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| 关 键 词： | 定位系统 移动通信 数据传输 GPS DGPS AVLS |
| 收稿时间： | 1996-12-03 |
Data Link Design for Automatic Vehicle Location Systemwith High Capacity and Precision |
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| Wu Shaochun,Li Xianliang,Zhang Qishan.Data Link Design for Automatic Vehicle Location Systemwith High Capacity and Precision[J].Journal of Beijing University of Aeronautics and Astronautics,1998,24(2):145-148. |
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| Authors: | Wu Shaochun Li Xianliang Zhang Qishan |
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| Institution: | Beijing University of Aeronautics and Astronautics,Dept. of Electronic Engineering |
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| Abstract: | The present automatic vehicle location system (AVLS) has some defaults such as smaller capacity,alarm collision and lower precision etc.Based on the characteristic analysis of AVLS and slot ALOHA (SALOHA),a new method of data link design,which is called Broadcast Reserved ALOHA (BRALOHA),is proposed in this paper,consequently the base station broadcasts differential GPS(DGPS) information,and mobile users transmit their location information reservely,and smooth GPS receiver's noise.It has been shown that BRALOHA is satisfied with the design for AVLS with high capacity and precision by its centralized communication scheme,the throughput versus offered load and throughput versus delay performance . |
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| Keywords: | locate systems mobile communication data transmit GPS DGPS AVLS |
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