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�������պ����ѧѧ�� 2005, Vol. 31 Issue (01) :98-101    DOI:
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����GPRS�ij�����Ϣƽ̨��������ؼ�����
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In-vehicle information platform based on GPRS
Zhang Zhengxuan, Zhang Qishan*
School of Electronics and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

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ժҪ ��ͨ�����߷���ҵ��GPRS(General Packet Radio Service)���䷽ʽ����������,����˵�������Ķ����ŵ�,��Ƴ�һ������߽�ͨ�ִ����̶�ΪĿ�ĵ����ͳ�����Ϣƽ̨,�����ʵ�ʲ��������ϵͳ�����幦�ܡ���Ӳ��ʵ�ַ����ȶ෽�����������,�Ե�¼GPRS����Ĺؼ������������ص����,�������ϵͳ���ܵķ���������ϸ����.ʵ��������:�����Ƶ�ϵͳ���ݶ�ʧ����5%~6%֮��,�����ӳ��ʵ���1%,�����൱��ʵ�ü�ֵ,��Ϊ�������ؼ��ϵͳ�����ƿ����ṩ�˾���һ���ο���������ۺ�ʵ���о����.
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Abstract�� Many outstanding advantages of GPRS transmission mode was analyzed, and a novel type of in-vehicle information platform was put forward, which focused on improving modernization degree of city traffic. Also, based on the actual test status, function of the system, the frame of hardware and the implementation of software and so on were elaborated. The key technique which used to log on GPRS network were emphasized, the ways and means on how to improve the performance of system were detailed . The test result shows the data lost rate is between 5%~6% and the data delay rate is less than 1% after consummating the system. It possesses high practical value, and provides some significative theory and test results for other in-vehicle monitoring system development.
Keywords�� integrated communication/navigation/identification system   data transmission   monitoring control   packet switching   PPP   embedded system     
Received 2003-08-15;
About author: ������(1976-),��,ɽ��̫ԭ��,��ʿ��, zhangzhengxuan@263.net.
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����, ������.����GPRS�ij�����Ϣƽ̨��������ؼ�����[J]  �������պ����ѧѧ��, 2005,V31(01): 98-101
Zhang Zhengxuan, Zhang Qishan.In-vehicle information platform based on GPRS[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2005,V31(01): 98-101
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http://bhxb.buaa.edu.cn//CN/     ��     http://bhxb.buaa.edu.cn//CN/Y2005/V31/I01/98
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