Method, communication system and apparatus for switching calls o

Details Method, communication system and apparatus for switching calls o Method, communication system and apparatus for switching calls o

1998-08-28

2000-07-25

Eisenzopf, Reinhard J.

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

455509, H04Q 700

Patent

active

060945826

ABSTRACT:
The invention relates to a method, a communication system and a switching apparatus which perform a switching of calls to another channel (CC2) when two or more calls simultaneously attempt to use a channel (CC1). According to the invention, each channel is first set (S3, S4, S5, S8) to a first call state when first attempting to use a channel. In the first call state, first predetermined transmission conditions must be satisfied (S5) in order that the call proceeds to a second call state (S9, S10, S11, S14) in which second predetermined transmission conditions (S11) must be satisfied. Due to this progression of the call through a first, second and possibly higher order call states, it can ensured that always a new call will always accomplish a hand-over to a new channel (CC2). The invention finds particular application when a channel may be used several times by several calls in a communication network of a channel re-use type and a substantial interference of the at least two calls occur when they use the same channel in close proximity, e.g. when handing over a mobile telephone of a GSM system to a GSM-based cordless telephone system.

REFERENCES:
patent: 4965850 (1990-10-01), Schlomer
D. Mosimann, P. R. Cabestre: Mobilitat in privaten Telekommunikations-netzen (PTN) in: TEC Mar. 1995 (Das technische Magazin von ASCOM), Seiten 14-20 (w/English Excerpt).

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