Handover arrangement for mobile station moving across the boundary of wireless cell-site stations of adjacent PBXs
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United States of America Patent
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-
Dec 11, 2001
Grant Date -
N/A
app pub date -
Apr 16, 1999
filing date -
Apr 16, 1998
priority date (Note) -
In Force
status (Latency Note)
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Abstract
In a PBX network, a global database is provided in each PBX node for storing shared data for verification of authorized mobile stations when accessing the network via a wireless cell-site station. During a wireless mode, a mobile station monitors the strength of its downlink signal from a first cell-site station of a first PBX node. If it falls below a threshold, the mobile station begins a scan across the spectrum. If a strong signal is detected, it stops the scan and transmits a handover request message to a second cell-site station transmitting that strong signal. The second node receives the message via the second cell-site station to establish the mobile's verification. If the mobile station is an authorized user, the second node transmits a handover grant message to the second cell-site station, transmits a command message to the first node for a switchover to a link between the first and second nodes, and connects the link to the second cell-site station.
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