Cushman, Darby & Cushman Intellectual Property Group of Pillsbury, Madison & Sutro LLP
Dual mode subscriber terminal and a handover procedure of the dual mode subscriber terminal in a mobile telecommunication network
 A dual mode terminal is provided, in which a mobile station of a mobile radio system and a cordless telephone are combined. This kind of terminal may have a connection with both a base station of the mobile radio system and a fixed part of the cordless telephone system. Handover may imply the transfer of a call from a fixed part of the cordless telephone system having a terminal-initiated handover to a base station of the mobile radio system having a network-initiated handover. In order to carry out a proper handover procedure, the cordless telephone part obtains from the mobile station part of the terminal measurement results relating to received signal strengths of the mobile system base stations in the neighborhood. The cordless telephone part of the terminal forwards these measurement results via a fixed part of the cordless telephone system to the mobile exchange of the mobile system in a handover request message. The mobile exchange selects a proper base station for handover and informs the mobile station part of the terminal about the identity of the selected base station via the cordless telephone part. 
Nokia Mobile Phones Limited Nokia Telecommunications Oy
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inventional additional additional
Teuvo John Sanna
Jarvela Byrne Maenpaa