ժҪ �ڶ�Э�顢���û�GPS(Global Position System)/GSM(Global System for Mobile communications)���ϵͳ��,���ص���ƶ�ϵͳ�����ܡ������ԺͿ���չ������Ҫ����.�������������������Ҫע��ļ����ؼ�����:ͨ��������ͬ����Ϣ�������Ľӿ�Э��,���ʹ��Э�������ʵ�ֶ�Э�����;���������û�ϵͳ��ͨ��ָ���ʽ,�������˵�ַ��ת������.����������ö��̷߳�ʽ����Ϣ����ʵ������ϵͳ���ŵ�,��������һ������ʵ�ֵ���Ϣѭ������.ʵ��֤����������ǿɿ���Ч��.
Gateway design is crucial for developing a GPS/GSM supervisory system with satisfactory system performance, availability and expandability. Several related key techniques for gateway design were dealt with. After analyzing different Short Message Service Center (SMSC) interface protocols, a protocol manager was introduced to achieve multi-protocol capability. Custom communication instruction format was proposed. The address conversion procedure was discussed in detail. Advantages of multi-thread and message driving in software architecture were also presented. The reliability of the gateway design strategy was proved by a practical implementation with the proposed techniques.
TAO Hai-liang, ZHANG Qi-shan.Design and Implementation of Gateway Supporting Multi��Protocol ��and Multi��User for GPS/GSM Supervisory System[J] JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2002,V28(3): 272-275