Method and system for using basic service set identifiers (BSSIDs) for emergency services routing
First Claim
1. A method for emergency services call routing in a network that includes a voice-over-packet (VoP) network and a plurality of public safety answering points (PSAPs), said method comprising:
- a mobile node obtaining a first indicator of its location by a first method;
said mobile node obtaining a second indicator of its location by a second method, wherein said first and second methods are distinct;
a wireless access point of said VoP network receiving from said mobile node at least one message relating to an emergency services call originating from said mobile node, wherein said at least one message includes a Session Initiation Protocol (SIP) INVITE message that requests establishment of said emergency services call and includes said first and second indicators; and
routing said call to a particular PSAP, from among said plurality of PSAPs, based on at least one of said first and second indicators.
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Accused Products
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.
243 Citations
18 Claims
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1. A method for emergency services call routing in a network that includes a voice-over-packet (VoP) network and a plurality of public safety answering points (PSAPs), said method comprising:
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a mobile node obtaining a first indicator of its location by a first method; said mobile node obtaining a second indicator of its location by a second method, wherein said first and second methods are distinct; a wireless access point of said VoP network receiving from said mobile node at least one message relating to an emergency services call originating from said mobile node, wherein said at least one message includes a Session Initiation Protocol (SIP) INVITE message that requests establishment of said emergency services call and includes said first and second indicators; and routing said call to a particular PSAP, from among said plurality of PSAPs, based on at least one of said first and second indicators. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for emergency services call origination, said method comprising:
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a mobile node associating with a wireless access point of a voice-over-packet (VoP) network; said mobile node storing a basic service set identifier (BSSID) of said wireless access point; said mobile node receiving a request from a user to originate an emergency services call; and in response to said request, said mobile node; (a) determining a mobile node position using a wireless positioning technology; and (b) wirelessly transmitting a Session Initiation Protocol (SIP) INVITE message to said wireless access point, said SIP INVITE message including said BSSID and said mobile node position. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A system for emergency services call routing in a network that includes a voice-over-packet (VoP) network and a plurality of public safety answering points (PSAPs), said system comprising:
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a plurality of wireless access points communicatively coupled to said VoP network, each of said wireless access points being associated with a respective basic service set identifier (BSSID); an access point database, said access point database storing BSSIDs and locations of said wireless access points; an automatic location information (ALI) database, said ALI database storing information regarding areas served by each of said PSAPs; and a proxy server communicatively coupled to said VoP network, access point database, and said ALI database, wherein said proxy server consults said access point database and said ALI database to selectively route an emergency services call from one of said wireless access points to an appropriate one of said PSAPs. - View Dependent Claims (18)
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Specification