根据现有的IETF移动IP规范,当移动节点驻留在远离归属网络的外地网络时,将会产生严重的注册延迟,从而引起严重的包丢失和通信吞吐量的下降。本文利用改进后的移动IP网络结构,引入routing agent,使得大量的当地注册报文只需要在RA上处理即可,从而减少了注册延迟,改善了移动IP的性能,本文对其中的注册代价进行了深入的分析,并与标准移动IP中的注册代价进行了对比。 According to the existing IETF mobile IP specification, mobile nodes will have serious registration delays when camping on foreign networks far from the home network, causing severe packet loss and decreased throughput of communications. In this paper, the improved mobile IP network structure is introduced and the routing agent is introduced. As a result, a large number of local registration messages only need to be processed on the RA, reducing the registration delay and improving the performance of mobile IP. In this paper, In-depth analysis and comparison with the registration cost in standard mobile IP.