The characteristics of embedded systems based on 8bit or 16bit MCU are analysed. The system framework of TCP/IP protocol stack for embedded systems is researched. A method to choose TCP/IP protocols and a strategy to cut out functions are presented. For implementing TCP/IP protocols in an embedded system, the key problems need to be solved and the flow chart for protocol processing are described. Based on an indepth analysis of control field for protocols, from the points of program and applications, the detailed solution schemes and implementation techniques are given. The experimental results show that the scheme and techniques have some reference value for the design of embedded internet systems.

embedded system； Internet； TCP/IP protocol