Abstract: To improve the performance of inter-domain handoff in mobile IP，this paper proposes a macro-mobility management scheme.It’s a new scheme based on MAP selected beforehand.MN can select the new MAP in terms of the routers advertisements when MN moves into EAR which belongs to the old MAP region.CN can delivery the data through two MAPs.At the same time，the new MAP will buffer the arrived packages，which can deduce the latency of the inter-domain handoff and the loss of the packages.

Key words: Mobility Anchor Point（MAP）, Edge Access Router（EAR）, two paths, macro mobility

摘要： 为了提升移动IP域间切换的性能，提出了基于MAP的提前选择的宏移动管理方式。在这种方式下，移动主机在移动到旧的MAP边缘路由器（EAR）上时，根据收到的路由公告消息提前进行MAP的选择；对端节点可以通过两个MAP进行转发数据，同时利用在新选择MAP处缓存到达的分组，可以有效减少域间切换带来的延迟同时也降低了分组的丢失。

关键词: 移动锚点, 边缘接入路由器, 双路径, 宏移动