Telecommunications – Transmitter and receiver at separate stations
Patent
1988-03-11
1991-11-19
Kuntz, Curtis
Telecommunications
Transmitter and receiver at separate stations
379 60, H04Q 704
Patent
active
050671715
ABSTRACT:
A method and apparatus for a hand-off of a call-in-progress according to the present invention is arranged such that both a first ratio of a length of time, in which a measured value of SNR is below a predetermined "threshold" to a total length of the measuring time, and a second ratio of a length of time, in which a measured value of RSSI is below a predetermined "threshold", to a total length of the measuring time are detected and that the first ratio functions mainly when the "threshold" of RSSI is predetermined to a relatively low value; and the second ratio functions mainly when the "threshold" of RSSI is predetermined to a relatively high value, thereby optimizing the hand-off timing.
REFERENCES:
patent: 4485486 (1984-11-01), Webb et al.
patent: 4531235 (1985-07-01), Brusen
patent: 4619002 (1986-10-01), Thro
patent: 4704734 (1987-11-01), Menich et al.
patent: 4718081 (1988-01-01), Brenig
patent: 4751725 (1988-06-01), Bonta et al.
patent: 4759051 (1988-07-01), Han
Title "Cellular Handoff Procedure", Oct. 1984 by Astronet Corp.
Title "Handoff Procedure in Nordic NMT System", published 3/3/83.
Astronet Corp., Cellular Handoff Procedure, Engineering Bulletin 011, Oct. 1984.
Nordic Systems, Handoff Procedure in Nordic NMT System, Mar. 1983.
Kuntz Curtis
Mitsubishi Denki & Kabushiki Kaisha
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