Modeling in hierarchical mobile IPv6 and intelligent mobility management scheme

Decreasing communication and management cost is a key issue of the research of Internet mobility management. Hierarchical mobile IPv6 (HMIPv6) has been proposed to reduce the number of location registration messages in backbone network by using hierarchy agent, but resources consumption inside the hierarchical domain is increased as expense. In this paper, a concept of integrated optimization is proposed, in which network cost and bandwidth consumption of delivering management messages and data payload is optimized both inside and outside hierarchical domain in a certain degree. Mathematic models of HMIPv6 are built on the viewpoint of entire network resource, and the judgment rule is obtained in result, which determines when HMIPv6 is adopted preferably. Based on the rule, intelligent mobility management scheme (IMMS) is designed, which allows a mobile node to select a suitable mobility management mechanism from mobile IPv6 and HMIPv6 according to its working parameters. Only mobile node's protocol stack needs to be changed in IMMS and co-operation ability is assured.