Telephonic communications – Audio message storage – retrieval – or synthesis
Patent
1992-03-17
1995-07-11
Kuntz, Curtis
Telephonic communications
Audio message storage, retrieval, or synthesis
455 332, 455 334, H04Q 738
Patent
active
054328420
ABSTRACT:
With respect to a mobile communication system, intelligence learns a cell boundary where the field strength of adjacent base stations becomes equal, by measuring field strength of communications, and from this data determined and stored over a period of time, the intelligence calculates the position and velocity vector of each mobile unit, from which a priority for hand-off can be determined. Hysteresis of the hand-off is determined with respect to hand-off boundaries located a fixed distance from the measured cell boundary, with hand-off preferably being soft hand-off within the narrow hand-off boundaries. Priority is particularly determined using fuzzy logic and calculation of the time estimated for the mobile unit to reach the cell boundary. Battery consumption of the mobile units is improved by prolonging the interval of checking the position of mobile units, when the mobile units are moving slowly or not moving at all. The determination of the cell boundary is updated continuously, to compensate for environment changes affecting field strength.
REFERENCES:
patent: 3764915 (1973-10-01), Cox et al.
patent: 4667202 (1987-05-01), Kammerlander et al.
patent: 4881082 (1989-11-01), Graziano
patent: 5095531 (1992-03-01), Ito
patent: 5161248 (1992-11-01), Bertiger et al.
patent: 5170485 (1992-12-01), Levine et al.
patent: 5235633 (1993-08-01), Dennison et al.
patent: 5239667 (1993-08-01), Kanai
IEEE Communications magazine, "The Cellular Environment of Lightweight Handheld Portables", 1989, pp. 20-29.
Fluhr et al, The Bell System Technical Journal, "Control Architecture", vol. 58, No. 1, Jan. 1979, pp. 43-69.
Chadha et al, The Bell System Technical Journal, "Mobile Telephone Switching Office", vol. 58, No. 1, Jan. 1979, pp. 71-95.
Fujiwara Yukinari
Kinoshita Yasuaki
Kurosawa Michiaki
Nakagoshi Arata
Nakasawa Hideo
Bost Dwayne D.
Hitachi , Ltd.
Kuntz Curtis
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