摘要
设计了基于GPRS的流量计量仪器。该仪器由传感器、单片机和GPRS模块组成。着重论述软件设计部分,通过拨号建立物理层连接,介绍PPP(点对点协议)协议,并将该协议用于数据链路层,应用层采用UDP协议。着重论述了PPP协议的程序设计,包括LCP、NCP和PAP协议的软件设计与实现,并给出了部分测试结果。
The flows meter is designed based on GPRS.The apparatus consists of sensors,MCU and GPRS module.The part of software is discussed by emphasized.Physical layer connection is established by dialing number,PPP（point to point protocol） is used in Data link layer,and UDP protocol in Application layer.The software is introduced the PPP and mainly focused on design and implementation method of PPP,including LCP（Linking configuration protocol）,NCP（Network configuration protocol） and PAP（PPP authentication protocol）.Some test data is given out.
出处
《科学技术与工程》
2011年第1期25-28,34,共5页
Science Technology and Engineering
