Kwang-Roh Park

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T i l id d h t th t ll l i id th h t yp ca v eo oor p one sys ems a a ow peop e ns e e ome o communicate with visitors at the door. To overcome these limitations, we propose an architecture supporting user mobility. The proposed architecture based on the Session Initiation Protocol and a home gateway system connected to a conventional intercom or a video(More)