Abstract
The integrating of wireless cellular network and wireless LAN can take full advantage of each other, and provides consumers with much more comprehensive wireless service. This paper is dead against the scarcity in the current integrating technology of this aspect, and proposes a new mobility management scheme based on Mobile IP technology, for the sake of reducing the handoff delay time, resolving the triangle routing problem rooted in Mobile IP technology, etc. This will bring benefit to the upgrade and development of mobile communication network.