Method and system for using basic service set identifiers (BSSIDs) for emergency services routing
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United States of America Patent
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Jul 17, 2007
Grant Date -
N/A
app pub date -
Aug 24, 2005
filing date -
Aug 24, 2005
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A plurality of public safety answering points (PSAPs) are accessible via a voice-over-packet (VoP) network. Each wireless access point of the VoP network is identified by a basic service set identifier (BSSID). A mobile node associates with a wireless access point and stores the wireless access point's BSSID as an indicator of the mobile node's location. A user of the mobile node dials digits for an emergency services call. In response, the mobile node transmits a SIP INVITE message that includes the BSSID and an additional indicator of the mobile node's location, e.g., determined using GPS or tower triangulation. A SIP proxy server receives the SIP INVITE message and attempts to determine the appropriate PSAP to answer the call based on the BSSID. If the attempt is unsuccessful, the SIP proxy server determines the appropriate PSAP based on the additional indicator.
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