Method for preventing a dropped call during a handoff in a radio

Details Method for preventing a dropped call during a handoff in a radio Method for preventing a dropped call during a handoff in a radio

1994-09-30

1996-12-31

Kuntz, Curtis

Telephonic communications

Audio message storage, retrieval, or synthesis

455 332, 370335, 370332, H04Q 722, H04J 1302

Patent

active

055901778

ABSTRACT:
A method, performed by a mobile station (119), prevents an active call from being dropped when the mobile station (119) suddenly transitions from a first coverage area (121) to a second coverage area (122) in a code division multiple access (CDMA) cellular radiotelephone system (100). The active call is determined (601) to be in danger of being dropped responsive to the mobile station (119) suddenly transitioning from the first coverage area (121) to the second coverage area (122). The first base station (115) is notified (602) that the active call is in danger of being dropped responsive to the step of determining (601). The active call with the first base station (115) is determined (603) to be in the process of being dropped responsive to the step of notifying (602). The active call is established (604) with the second base station (116) in the second coverage area (122) before the active call with the first base station (115) is dropped responsive to the step of determining (603).

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Kerr, Richard et al., "The CDMA Digital Cellular System, an Asic Overview", IEEE 1992 Custom Integrated Circuits Conference, Qualcomm, Inc., pp. 10.1.1-10.1.7.
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