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The challenge to provide seamless mobility in the near future emerges as a key topic in various standardization bodies. In this paper, on the basis of an efficient and scalable Locator/ID separation (LIDS) architecture, a mobility management mechanism is designed. There are two contributions of our solution. Firstly, we separate the access network from the core network. Besides, to provide the seamless mobility support, locator/ID separation is used which can provide transparency to the upper layer applications. Then, the performance analysis is presented for both horizontal and vertical handover scenarios. The results show that our LIDS based architecture provides an outstanding network-based mobility management with route optimization support compared with the IP based approaches Mobile IPv6 and Proxy Mobile IPv6).