Mobile multimedia services such as TV-call or video streaming are gradually becoming popular in the 3rd generation mobile network (IMT-2000). Multimedia traffic is expected to continue increasing into the coming years, and IP technology is considered to be capable of efficiently transporting such huge volumes of multimedia traffic. Aimed at ALL-IP mobile networks, we are proposing the IP-based IMT Network Platform (IP2), which represents an evolution from IMT-2000. In this paper, we propose the Edge Intelligent Mobility Management Protocol (EIM) to enable IP mobility in future ALL-IP mobile networks to meet mobile operators' requirements. EIM employs the so-called network-controlled mobility management approach and conceals IP mobility from mobile nodes by processing user packet and mobility control at the edge node, access router. To verify feasibility and scalability, we have implemented EIM on our experimental system and conducted a series of tests. The results showed that processing delays for basic mobility operations are considerably small. It was also confirmed that the EIM is scalable regarding the increase of the number of mobile nodes and correspondent nodes.