Handover techniques

Details Handover techniques Handover techniques

1991-02-14

1994-01-11

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at separate stations

455 541, 455 561, 379 60, H04Q 702, H04Q 902

Patent

active

052789918

ABSTRACT:
In a cellular radio system having a two layer cell structure comprised by macrocells (1) overlaying microcells (2), handover occurs only via the macrocell layer. Thus when the quality of a call handled by a microcell (2) deteriorates below predetermined criteria the call is handed up rapidly to the umbrella macrocell and is only handed back down to a microcell when the handset has been in that microcell for a predetermined time and the quality of the link thereto exceeds predefined criteria.

REFERENCES:
patent: 4144411 (1979-03-01), Frenkiel
patent: 4398063 (1983-08-01), Hass et al.
patent: 4718081 (1988-01-01), Brenig
patent: 4723266 (1988-02-01), Perry
Ballard, M.; Issenmann, E., "Digital Cellular Mobile-Radio System ECR900", in European Transactions on Telecommunications and Related Techn., vol. 1, No. 1, Jan.-Feb. 1990, pp. 17-30.
Patent Abstracts of Japan, vol. 13, No. 541, (E-854), Dec. 5, 1989, (relates to JP A 12 23 834 (NEC)).
IEEE Communications Magazine, vol. 27, No. 7, Jul. 1989, New York, (U.S.), pp. 20-29, R. Steele, "The Cellular Environment of Lightweight Handheld Portables".

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