Selective carrier denial for mobile subscribers

Details Selective carrier denial for mobile subscribers Selective carrier denial for mobile subscribers

1996-12-18

2000-06-27

Trost, William G.

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

455411, H04Q 720

Patent

active

060817313

ABSTRACT:
Selective carrier denial in a cellular system restricts some or all carrier-handled calls from a given cellular subscriber while simultaneously allowing other cellular calls. A restriction flag or indicator in a Visitor Location Register (VLR) of the cellular system is set by a Home Location Register (HLR) which contains a list of those carriers denied to subscribers. When the restriction flag is set, the HLR is interrogated to determine if the call is restricted. Alternatively, the restriction flag may reside within the subscriber's mobile phone. Further, the VLR or mobile phone may, respectively, contain a list of denied carriers and internally determine if carrier denial applies without resort to the HLR.

REFERENCES:
patent: 4908848 (1990-03-01), Hanawa
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patent: 5689548 (1997-11-01), Maupin et al.
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patent: 5815808 (1998-09-01), Valentine
patent: 5845211 (1998-12-01), Roach, Jr.
patent: 5884193 (1999-03-01), Kaplan
patent: 5950125 (1999-09-01), Buhrmann et al.

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