Abstract: RMIPv6, proposed by IETF, is an improved mobility management scheme to Mobile IP, which features employing the dynamic regional anchor points to carry out the micro mobility management inside domains. This paper analyzes the advantages and disadvantages of RMIPv6, and improves the scheme by using a method based on region discovery. Benefited from the anchor points' region advertisement and the given cost constraints, the mobile nodes can start the proper handover routine in advance, so reducing the cost effectively when mobile nodes moving from one region to another. The amended scheme can be implemented by extending the OSPF's packet header. The simulation result shows the advantage of the improved scheme in the cost of location update compared with the original RMIPv6.