Performance improvement on duplicate address detection in IP mobility protocols

When a mobile node moves into a new network, it should get a new care-of address. The new care-of address must be verified to be unique before used. The process of verifying the uniqueness of a care-of address is called the Duplicate Address Detection (DAD) and is estimated to take 1000 milliseconds or more. It is unacceptable for real-time applications. In this paper, the MD5 algorithm is applied on the IPv6 address auto-configuration to generate an IPv6 address and the numerical result shows that generated IPv6 addresses are expected to be uniformly distributed. Consequently the probability of the IPv6 address collision of generating the same IPv6 address is expected to be much less. A simplified DAD is then proposed to reduce the processing time of the DAD and then to improve the handover performance of IP mobility protocols.