在移动IP中,根据子网前缀以及均匀分布于区间[min,max]上的广告间隙,移动节点检测它自身是否移动.因此,区间的长度对于移动检测延时有直接的影响.然而,在移动IP 中,区间的静态配置既不方便也不灵活.根据链路带宽的利用率,提出了一种动态调整区间的新方法,并且进行了理论分析.结果显示,与静态区间相比,动态区间的方法显著地减少了不必要的移动检测延时. In mobile IP, the mobile node detects whether it moves itself according to the subnet prefix and the advertisement gap uniformly distributed in the interval [min, max], therefore, the length of the interval has a direct impact on the movement detection delay In the mobile IP, the static configuration of the interval is neither convenient nor flexible.According to the utilization of the link bandwidth, a new method to dynamically adjust the interval is proposed and the theoretical analysis is carried out.The results show that, compared with the static interval, the dynamic The method of the interval significantly reduces the unnecessary movement detection delay.