method for providing location-based services for a call on a packet-switched wireless communication network, packet-switched wireless communication network, and method for routing a call from a first network element to a wireless communication network packet switched

摘要

"method for providing location based services for a call on a packet switched wireless communication network, packet switched wireless communication network, and method for routing a call from a first network element to a wireless communication network" packet-switched wires ". An emergency phone call is supported and routed to a public safety answer point (PAP) in an IP-based packet switched wireless communication network. an enable pdp context request message is sent from a user device to the network. a parameter in said pdp context request enable message indicates that the pdp context will be used to transfer an emergency call. a pdp context accept enable message is returned from said support node to said user equipment. said pdp context accept enable message recognizes said pdp context request enable message and provides the address of a call state control function. A call setup request transferred to the call state control function includes the service area identity (exits). the call state control function selects a psap based at least in part on the exit included in the call setup request and forwards the emergency call to the selected psap.