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This paper presents comparative results on Hierarchical Mobile IPv6 and Proxy Mobile IPv6. The two mobility support protocols have similar hierarchical mobility management architectures but there are, however, clearly different perceptions: Hierarchical Mobile IPv6 has specific properties of a host-based mobility support protocol, whereas Proxy Mobile IPv6 is based on a network-based mobility support protocol. Thus, it is important to reveal their mobility characteristics and performance impact factors. In this paper, a cost based evaluation model is developed that evaluates the location update cost, the packet delivery cost, and the wireless power consumption cost based on the protocol operations used. Then, the numerical results are presented in where impacts of the various system parameters are evaluated. The results demonstrate that Proxy Mobile IPv6 always outperforms Hierarchical Mobile IPv6 due to its ability to avoid the mobility signaling sent by the A preliminary version of this paper has been published in

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