Call hand-off with user selectable site switching

Details Call hand-off with user selectable site switching Call hand-off with user selectable site switching

1990-11-01

1993-06-22

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at separate stations

455 542, 455 561, H04Q 700

Patent

active

052222489

ABSTRACT:
In a trunked communication system with at least two communication sites, a call hand-off mid-call may occur when a mobile radio (109) moves from the coverage area of one site to the coverage area of another site. This second site may not have any communication resources available for this hand-off, and the radio (109) is issued a busy message. With user selectable site switching, the user may enter into the radio (221) the desire to return to the previous site, and the radio moves to the previous channel to continue (229) receiving the call.

REFERENCES:
patent: 3663762 (1972-05-01), Joel, Jr.
patent: 3819872 (1974-06-01), Hamrick
patent: 3896390 (1975-08-01), Wells et al.
patent: 3906166 (1975-09-01), Cooper et al.
patent: 4347625 (1982-08-01), Williams
patent: 4553263 (1985-11-01), Smith et al.
patent: 4556760 (1985-12-01), Goldman
patent: 4736453 (1988-04-01), Schloemer
patent: 4821310 (1989-04-01), Lynk, Jr. et al.
patent: 4885780 (1989-12-01), Gopal et al.

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