SYSTEM AND METHOD FOR PROVIDING EMERGENCY SERVICE IN AN IP-BASED WIRELESS NETWORK

摘要

An E-CSCF receives a Session Initiation Protocol (“SIP”) invitation message initiating an emergency communication session from a calling device. The E-CSCF generates an information request message based on the received SIP message and sends the information request message to a location server. The location server determines a geographical location of the calling device and uses the geographical location to determine a destination emergency response center, such as a Public Safety Access Point (PSAP). The location server provides location information for the destination PSAP to the E-CSCF. The E-CSCF generates a modified SIP invitation message using the presence information and sends the modified SIP invitation message to an emergency services network where it is routed to the emergency response center.

主权项

1. A system for providing emergency communication services in a wireless network implementing an IP Multimedia Subsystem (IMS) architecture, the system comprising:
a first communication component configured to:
receive a session initiation protocol (SIP) message from a calling device,
wherein the SIP message includes a request to initiate an emergency communication session, a device identifier, anda geographical location of the calling device; andsend an emergency response center information request based on the received SIP message and including the calling device location; and a second communication component configured to:
receive the emergency response center information request;determine a destination emergency response center proximate to the calling device,
wherein the destination emergency response center is determined by identifying an emergency response center that has a geographical coverage area encompassing the geographical location of the calling device; andprovide the destination emergency response center to the first communication component in response to the emergency response center information request; wherein the first communication component is further configured to:
modify the received SIP message to generate a modified SIP message containing routing information associated with the destination emergency response center; andsend the modified SIP message to the destination emergency response center.