Selective carrier denial for mobile subscribers
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United States of America Patent
Stats
-
Jun 27, 2000
Grant Date -
N/A
app pub date -
Dec 18, 1996
filing date -
Dec 18, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
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.
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