Method of effecting handover in a mobile multilayer cellular rad

Details Method of effecting handover in a mobile multilayer cellular rad Method of effecting handover in a mobile multilayer cellular rad

1992-06-19

1995-02-21

Urban, Edward F.

Telecommunications

Transmitter and receiver at separate stations

455 542, 455 561, 379 59, 379 63, H04B 700, H04Q 702, H04Q 900

Patent

active

053924533

ABSTRACT:
A method of effecting handover in a mobile telephone system comprising fixed base stations and mobile stations. The system includes several layers of radio cells, where a cell in a given layer covers several cells in a nearest underlying or subordinate layer. A mobile station moving in a microcell may find it difficult to handover to another microcell in the same cell layer, when the signal strength of the established connection in the first microcell is rapidly weakened. No information concerning the target base station can be transmitted. According to the proposed method, handover is effected to a cell in the nearest overlying cell layer, a so-called umbrella cell, either permanently (the mobile is moving quickly) or temporarily (the mobile is moving slowly). In the latter case, handover is made back to a microcell. The handover command is either transmitted from the base station of the microcell having elevated power, or from the target base station.

REFERENCES:
patent: 4144411 (1979-03-01), Frenkiel
patent: 4144496 (1979-03-01), Cunningham et al.
patent: 4613990 (1986-09-01), Halpern
patent: 4797947 (1989-01-01), Labedz
patent: 4811380 (1989-03-01), Spear
patent: 5189734 (1993-02-01), Bailey et al.
patent: 5278991 (1994-01-01), Ramsdale et al.
H. Eriksson et al. "Development of Radio Access in Cellular Systems--the Basis of Personal Telephony" Ericsson Review, pp. 2-9 (1992).
H. Jansson et al. "The Future of Cellular Telephony" Ericsson Review, pp. 42-52 (1990).
United, Idle Mode Cell Reselection For Microcells, Sep. 1991.

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