Validation of subscriber signals in a cellular radio network

Details Validation of subscriber signals in a cellular radio network Validation of subscriber signals in a cellular radio network

1996-01-25

1997-11-04

Kizou, Hassan

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

370350, 375349, 379 59, 455 331, 455 541, 455 63, H04B 110, H04Q 730

Patent

active

056847947

ABSTRACT:
A relative time offset is measured between transmission of a downlink signal from a cellular radio network base station, and a reference signal (e.g., sync word) included in an uplink signal received at the base station from a network subscriber. If the measured time offset is within a determined range, the uplink signal is judged to originate from a subscriber which is validly assigned to the base station, and the base station will continue to track the valid uplink signal. If the relative time offset is outside the determined range, the uplink signal is judged invalid, e.g., to originate from an interfering co-channel subscriber assigned to a remote base station. The receiving base station will then inhibit tracking of the invalid uplink signal.

REFERENCES:
patent: 5177740 (1993-01-01), Toy et al.
patent: 5319796 (1994-06-01), Grube et al.
patent: 5512908 (1996-04-01), Herrick
patent: 5576717 (1996-11-01), Searle et al.
patent: 5594720 (1997-01-01), Papadopoulos et al.
D.M. Balston, et al., Cellular Radio Systems, Ch. 9, pp. 225-235 (Artech House 1993).
R.C.V. Macario, Cellular Radio Principles and Design, pp. 186-189 (McGraw-Hill 1993).
EIA/TIA-IS-54-B, p. 11.

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