System and method for effecting information transm

专利名称：System and method for effecting

information transmission and soft handoffbetween frequency division duplex and timedivision duplex communications systems

发明人：Ari Hottinen,Marko Teittinen,M. Oguz Sunay申请号：US093523申请日：19990730公开号：US06611507B1公开日：20030826

专利附图：

摘要：A system and method for controlling information transmission and

communication handoff between frequency division multiplexing (FDD) and time divisionmultiplexing (TDD) communication systems using any multiple access scheme is provided.The mobile unit transmits information via a current one of the FDD and TDD

communication systems while it moves toward the other, or targeted one of the FDD andTDD communication systems. A pilot search signal is generated by the targetedcommunication system, where the pilot search signal corresponds to a transmissionrange of the targeted communication system. A communication handoff is initiated fromthe current communication system to the targeted communication system when themobile unit recognizes a predetermined threshold level of the pilot search signal.Concurrent communications are synchronized and temporarily maintained between themobile unit and both the current and targeted communications systems using anincreased data rate for each of the communications links. When the handoff is complete,transmission between the mobile unit and the current communication system isterminated, while communication between the mobile unit and the targetedcommunication system is maintained when the handoff is complete.

申请人：NOKIA CORPORATION

代理机构：Squire, Sanders & Dempsey LLP

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