05101501 is referenced by 754 patents and cites 6 patents.

In a cellular telephone system a system for directing communications between a mobile user and cell-sites as a mobile user changes cell-site service areas. The mobile user includes an apparatus for, while in communication with another system user via one cell-site, determining a transition of the mobile user from the cell-site service area to the service area of another cell-site. The system includes circuitry responsive to the indication for coupling communications between the mobile user and the other system user via the new cell-site while the mobile user also remains in communication with the system user via the first cell-site. The system further includes apparatus responsive to the coupling of the communications between the mobile user and the other system user via the new cell-site for terminating the communications between the mobile user and another system user via cell-site with communications continuing between the mobile user and the system user via the new cell-site.

Title
Method and system for providing a soft handoff in communications in a CDMA cellular telephone system
Application Number
7/433030
Publication Number
5101501
Application Date
November 7, 1989
Publication Date
March 31, 1992
Inventor
Charles E Wheatley III
Del Mar
CA, US
Roberto Padovani
San Diego
CA, US
Klein S Gilhousen
San Diego
CA, US
Agent
Russell B Miller
Assignee
Qualcomm Incorporated
CA, US
IPC
H04M 11/00
H04Q 7/00
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