| http://www.w3.org/ns/prov#value | - According to the second embodiment of the present invention, even if the presence server is not provided with the presence information request function relative to HA, the presence server can acquire the Binding information of MN. In particular, since HA notifies the presence server of the MN location information, it is not necessary for MN existing in a network other than the home network to tran
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