Proxy Mobile IPv6 has been developed from the concept of network-based mobility support protocol in the IETF. The recently published specification of Proxy Mobile IPv6 only focuses on the mobility support. Then, route optimization issues are left in the basket for further works. In this paper, we provide the performance analysis in where the recently proposed route optimization is evaluated in terms of signaling cost and packet delivery cost. Through the provided analysis results, we demonstrate that route optimization solves the ineffective routing path problem during the mobile host communicates with its corresponding host and argue that the scalability of Proxy Mobile IPv6 architecture is improved due to the distributed routing path. In addition, the cost model developed in this paper would be a reference model in order to facilitate decision-making for further route optimization design.
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