Hard handoff method using the dummy pilot
Patent 6070075 Issued on May 30, 2000. Estimated Expiration Date: 
November 6, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
November 6, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMethod for generating dummy frequencies for frequency hard handover in code division multiple access mobile communication system Patent #: 5982759 InventorAssigneeApplicationNo. 964145 filed on 11/06/1997US Classes:455/437, Mobile assisted or initiated370/331, Hand-off control455/442Soft handoffExaminersPrimary: Vo, NguyenAttorney, Agent or FirmInternational ClassH04Q 007/20Foreign Application Priority Data1997-06-30 KRAbstractA hard handoff method is provided whereby a mobile station communicates with a base station to execute the handoff over a CDMA channel using only a pilot channel. The method does not require the use of a sync, paging, access, or traffic channel to carry out the handoff procedure. Unlike the conventional handoff in which a base station detects the signal strength of a mobile station continuously and performs a handoff if the signal strength falls below a predetermined threshold, the "Dummy Pilot" method requires the mobile station to provide the base station with handoff information, and the base station performs the handoff in accordance with the provided information.Field of SearchHandoffMobile assisted or initiated Soft handoff Base station selection Serving site initiated Handoff initiated by another source (e.g., target, user initiated, mobile switching center (MSC), or mobile telephone switching office (MTSO), etc.) Hand-off control Based upon a particular signal quality measurement Combining or distributing information via code word channels using multiple access techniques (e.g., CDMA) Combining or distributing information via code word channels using multiple access techniques (e.g., CDMA) | |
