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Mobile Ubiquitous Network (MUN) is an integrated network that consists of cellular network, ad hoc network, as well as local area networks (LAN) and so on. In such heterogeneous environment, the location management is one of the most important problems. It is studied in this paper the location management of the ubiquitous wireless networks. A unified location management framework is proposed which uses the coordinates mapping approach, and in which the location management of the familiar heterogeneous networks and the future networks could be achieved without changing the exiting networking much. The analyzing at the end of the paper shows that it has better performance than that of the architecture in existence.