Call set-up and spectrum sharing in radio communication on syste

Details Call set-up and spectrum sharing in radio communication on syste Call set-up and spectrum sharing in radio communication on syste

1990-10-25

1994-01-04

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at separate stations

455 541, 455 62, 455 63, H04Q 700, H04Q 900

Patent

active

052769089

ABSTRACT:
The call set-up technique of this invention is characterized by the use of channel information from both base station and subscriber terminal in determining the radio traffic channel upon which to set-up a new call. Communication between the base station and subscriber terminal is carried out on a signalling channel until the traffic channel is chosen. Calls are set-up so that they proceed on the radio channel which, of a set of channels under consideration by the subscriber terminal, contains the least amount of interference as measured at the subscriber terminal. The set of channels under consideration by the subscriber terminal is a subset of the entire set of channels allocated to the service. This subset is made up of those channels having little interference, as measured by the base station, and which, additionally, are not reserved exclusively for stationary, fixed-allocation services in the geographic location of the base station. The call set-up technique thereby assures that calls proceed on channels containing little interference from the viewpoints of both base station and subscriber terminal. The technique also facilitates sharing of the radio spectrum with stationary, fixed-allocation services because there is no need to program each subscriber terminal to avoid the spectrum allocated to the fixed service.

REFERENCES:
patent: 4628152 (1986-12-01), Akerberg
patent: 4771448 (1988-09-01), Koohgoli
patent: 5025254 (1991-06-01), Hess
patent: 5034993 (1991-07-01), Sasuta et al.
patent: 5093924 (1992-03-01), Toshiyuki et al.
CCIR Interim Working Paper, IWP 8/13-54, Jul. 3-12, 1990.

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